Page 1: Service Manual
SERVICE MANUAL Color Inkjet Printer EPSON STYLUS PHOTO 925 ® SEOT02006...
Page 2 T The contents of this manual are subject to change without notice. T All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.
Page 3 2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/ RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.
Page 4: About This Manual
Provides Epson-approved methods for adjustment. CHAPTER 6.MAINTENANCE Provides preventive maintenance procedures and the lists of Epson-approved lubricants and adhesives required for servicing May indicate an operating or maintenance procedure, practice or the product. condition that is necessary to accomplish a task efficiently. It may...
Page 5 Revision Status Revision Date of Issue Description June 21, 2002 First release...
Page 6: Table Of Contents
PRODUCT DESCRIPTION FEATURES ....................12 SPECIFICATIONS..................13 Physical Specification................13 Printing Specifications ................13 Paper Feeding..................13 General Specifications for Cutter Mechanism ......... 13 Input Data Buffer ..................13 Electric Specification ................14 Environmental Condition ................. 14 Reliability ....................15 Safety Approvals ..................
Page 7 Icons......................20 LEDs......................21 Error/Warning Display (LCD)..............21 Error 21 Warning 22 Warning Display at Initial Ink Charge 22 Button Functions ..................22 Power Button 22 Roll Paper Button 23 Maintenance Button 23 Print Button 23 Cancel Button 23 Up/Down Arrow Buttons 23 Select Button 23 Back Button 23 Custom Buttons 1 and 2 24...
Page 8 ASF/Pump Motor Drive Circuit 47 Cutter Motor Drive Circuit 47 Sensor Circuit 48 Troubleshooting Overview....................... 51 Troubleshooting with LED Error Indications and EPSON Status Monitor 3 Messages 52 Unit Level Troubleshooting................58 Disassembly and Assembly Overview....................... 74 Precautions ..................... 74 Tools......................
Page 9 Housing Lower Cover Right Rear and Front removal 83 Print Head removal.................. 85 CR Unit removal ..................87 CR Encoder Board removal ..............90 LD Roller removal..................91 PE Sensor removal ................. 94 ASF Unit removal ..................95 Waste Drain Ink Pad Unit removal ............98 CR Motor removal ...................
Page 10 The number of the cutting operation ............. 133 EEPROM backup data ................134 A4 normal paper printing ............... 135 EEPROM data..................136 Maintenance Overview..................... 138 ROM Replacement................138 Cleaning ....................138 Service Maintenance................139 Appendix Connector Summary................... 147 Major Component Unit ................147 ASP List......................
Page 11: Product Description
C H A P T E R PRODUCT DESCRIPTION...
Page 12: Features
EPSON Stylus Photo 925 Revision A 1.1 FEATURES The major features of EPSON color inkjet printer EPSON Stylus PHOTO 925 are: High quality and high speed standalone print (max. 1440 x 720 dpi in standalone printing) Three built-in card slots for Compact Flash, Smart Media and Memory Stick...
Page 13: Specifications
EPSON Stylus Photo 925 Revision A 1.2 SPECIFICATIONS Control Code ESC/P Raster command This section describes specifications of the printer. EPSON Remote command Character Tables 1.2.1 Physical Specification 1 international character sets Weight: 6.4 kg (with paper support and roll paper folder installed)
Page 14: Electric Specification
EPSON Stylus Photo 925 Revision A 1.2.6 Electric Specification 1.2.7 Environmental Condition Temperature <120 V version> Operating: 10 ~ 35°C Rated voltage: AC 120 V (See Figure 1-2 below for conditions) Input voltage range: AC 99 - 132 V Non-operating: -20 ~ 40°C...
Page 15: Reliability
EPSON Stylus Photo 925 Revision A 1.2.8 Reliability Total print volume: 16000 pages (A4, Letter) or 5 years, whichever comes first Print Head Life: 3000 million dots/nozzle or 5 years, whichever comes first 1.2.9 Safety Approvals <120 V version> Safety standards: UL1950 CSA22.2 No.950...
Page 16: Built-In Card Slots
EPSON Stylus Photo 925 Revision A 1.3 Built-in Card Slots 1.3.4 Multiple Slots Operation This section defines the specifications for the memory card types and card adapter • Only one media can be accessed at a time for PC connection or for C H E C K which can be used at standalone printing with this printer.
Page 17: External Storage Device Connecting Port
EPSON Stylus Photo 925 Revision A 1.4 External Storage Device Connecting Port 1.4.1 Compatibility Universal Serial Bus Specifications Revision 1.1 Bit rate: 12 Mbps (Full Speed Device) Data encoding: NRZI Adaptable connector: USB Series A Recommended cable length: 2 meters 1.4.2 Specifications for Devices Available...
Page 18: Standalone Printing Function
The full-pass of the file names are sorted in ASCII order. Enhanced frame file (*.EFF) Frame data file format defined for standard use of EPSON products. Only files in NOTE: Correct sorting of the files whose full-pass names are identical is not the “\MISC\FRAME\”...
Page 19: Date Data Capture Rule
EPSON Stylus Photo 925 Revision A 1.5.7.2 Date Data Capture Rule Date and time are captured in the following order of priority: Date and time information in accordance with the digital camera standard format (Exif). Data and time information of the file system supported in DOS (timestamp of the file).
Page 20: Control Panel
EPSON Stylus Photo 925 Revision A 1.6 Control Panel 1.6.2 Icons Table 1-3. Icons 1.6.1 Switches Name Icon Conditions This icon reflects the status of the first image (a file to which the Print Image Matching smallest number is assigned after sorting) in the card.
Page 21: Leds
EPSON Stylus Photo 925 Revision A Table 1-3. Icons 1.6.4 Error/Warning Display (LCD) Name Icon Conditions At the occurrence of any of the errors or warning listed below, the LCD shows the details of the error or warning and corrective actions to be taken.
Page 22: Warning
EPSON Stylus Photo 925 Revision A Table 1-5. Error (continued) 1.6.4.2 Warning Source Error Display Other Table 1-6. Warning Color ink cartridge not correctly Source Error Display Other Depends on the installed. result of the Printer Ink low Ink icon blinks...
Page 23: Roll Paper Button
EPSON Stylus Photo 925 Revision A 1.6.5.2 Roll Paper Button 1.6.5.6 Up/Down Arrow Buttons • While holding down this button, turn the power on to perform Status (nozzle check • Press the Up/Down arrow button to move the cursor (at the highlighted area) on the pattern) printing (nozzle check pattern).
Page 24: Custom Buttons 1 And 2
EPSON Stylus Photo 925 Revision A 1.6.5.9 Custom Buttons 1 and 2 1.7 Initial Setting Values This printer can store up to two desired set values for each setting item for direct Initial setting values during the initial operation are as follows.
Page 25: Paper
EPSON Stylus Photo 925 Revision A 1.8 PAPER Japanese Chokei 4 (90mm x 205mm) Japanese Yokei 1 (120mm x 176mm) Japanese Yokei 2 (114mm x 162mm) 1.8.1 Paper Handling Japanese Yokei 3 (98mm x 148mm) Japanese Yokei 4 (105mm x 235mm) Do not perform reverse feed more than 1.8mm (0.07”).
Page 26: Printing Area
EPSON Stylus Photo 925 Revision A 1.8.3 Printing Area 1.8.3.2 Envelopes 1.8.3.1 Cut Sheet See the figure below and tables on the right for printable areas. Left Margin Right Margin Top Margin Printable Area A Printable Area Figure 1-5. Printable Area for Envelopes...
Page 27: Operating Principles
C H A P T E R OPERATING PRINCIPLES...
Page 28: Overview
2.1 Overview Loop Scale Photo-interrupter (Encoder) This section describes the operating principles of the printer mechanism and electrical PF Motor circuit boards. The Stylus PHOTO 925 has the following boards: Cutter Motor Main board: C475 MAIN Timing Belt Paper Eject...
Page 29: Print Head
EPSON Stylus Photo 925 Revision A 2.1.2 Print Head The following explains print head basic components. As the print head, this printer employs the same U-CHIPS head as is used with Stylus PZT is an abbreviation of Piezo Electric Element. A certain level of voltage expands Photo 810/820, which permits multiple shot printing and variable printing.
Page 30: Printing Process
EPSON Stylus Photo 925 Revision A Ink Cavity 2.1.2.1 Printing Process The ink absorbed from the ink cartridge goes through the filter and then is stored This chapter explains the process in which the print heads of On-Demand inkjet temporarily in this tank called “cavity” until PZT is driven.
Page 31: Printing Method
2.1.2.2 Printing Method 2.1.3 Carriage Mechanism For print dot system, Stylus Photo 925 has the following two kinds of printing modes. The carriage mechanism consists of Carriage motor (CR motor), Carriage unit (CR unit), CR guide shaft, platen gap adjustment mechanism, parallelism adjustment Multiple shot printing mechanism etc.
Page 32: Carriage Home Position Detection
EPSON Stylus Photo 925 Revision A 2.1.3.3 Platen Gap Adjustment Mechanism & Parallelism Parallelism Adjustment Adjustment Mechanism Bushing The adjust lever (PG Lever) is mounted on the right end of the carriage guide shaft. CR Motor The carriage guide shaft is an eccentric shaft and is rotated by operating the adjust lever, and thus narrows (1.2 mm) or widens (2.1 mm) the gap (platen gap;...
Page 33: Paper Feeding Mechanism
EPSON Stylus Photo 925 Revision A 2.1.4 Paper Feeding Mechanism Figure 2-7 below shows the transmission path of the driving force from the PF Motor and the names of parts on the path. The paper feeding mechanism consists of the Paper Feed Motor (PF Motor), Paper Feed Roller (PF Roller), Driven Roller, Paper Eject Roller and Star Wheel Roller.
Page 34: Cutter Mechanism
EPSON Stylus Photo 925 Revision A 2.1.5 Cutter Mechanism Cutter Motor CT Sensor (Home-0) CT Sensor (Home-80) This printer is equipped with a cutter mechanism to cut the ejected paper automatically after printing on roll paper. The cutter consists of a combination of the fixed cutting...
Page 35: Paper Loading Mechanism
EPSON Stylus Photo 925 Revision A 2.1.6 Paper Loading Mechanism Figure 2-9 below shows the switching route concerning the driving force from the ASF/Pump Motor to the ASF Unit. The paper loading mechanism, located in the rear of the printer body, load paper from the ASF Unit to the PF Roller.
Page 36 EPSON Stylus Photo 925 Revision A When the ASF/Pump motor torque is switched to the ASF unit side by the clutch mechanism, the function of the ASF mechanism varies depending on the rotational direction of the ASF/Pump motor, as shown in the table below.
Page 37: Epson Stylus Photo
EPSON Stylus Photo 925 Revision A Figure 2-11 below shows paper loading from the ASF Unit and operation of each mechanism. Step 1 Step 2 LD Roller Hopper LD Roller Shaft When the paper is advanced When the ASF/Pump motor is...
Page 38: Ink System Mechanism
EPSON Stylus Photo 925 Revision A 2.1.7 Ink System Mechanism Table 2-8.ASF/Pump Motor Rotational Direction & Ink System Mechanism Ink system mechanism consists of pump unit (include the CR lock lever) and capping (*1) Directions Functions mechanism.The capping mechanism is placed in close contact with the print head and Counterclockwise •...
Page 39: Capping Mechanism
EPSON Stylus Photo 925 Revision A 2.1.7.2 Capping Mechanism 2.1.7.3 Cap Unit The capping mechanism comes in close contact with the head surface so that it ensures This printer does not use absorbing pads. To ensure the same effect as absorbing pads,...
Page 40: Electrical Circuit Operating Principles
2.2 Electrical Circuit Operating Principles 2.2.1 C408 PSB/PSE board The power supply boards of Stylus Photo 925 use a RCC (Ringing Chalk Converter) The electric circuit of the Stylus Photo 925 consists of the following boards. circuit, which generates +42VDC for drive line and +5VDC, +3.3VDC for logic line to...
Page 41 EPSON Stylus Photo 925 Revision A ZC-RCC Converter • Over current protective +42VDC function • Over voltage protective function 5V Chopper +5VDC Circuit • Secondary side SW function with delay circuit • Power saving mode applied 3.3V Chopper +3.3VDC Circuit...
Page 42: C475 Main Board
EPSON Stylus Photo 925 Revision A 2.2.2 C475 MAIN Board The printer mechanism is controlled by C475 MAIN. See Figure for the C475 MAIN board block diagram. C475 MAIN Printer section Printer section DRAM P-ROM Address CPU V833 Data (IC10)
Page 43: Main Elements
EPSON Stylus Photo 925 Revision A 2.2.2.1 Main Elements Table 2-11.Main Elements (Printer section) Following table provides the description of main element functions on the C475 main Location Function board. • USB storage class target V833 • Control of various cards Table 2-10.Main Elements (Printer section)
Page 44: Motor Driver Circuit
EPSON Stylus Photo 925 Revision A 2.2.2.2 Motor Driver Circuit DC motors are used. The ASF/Pump Motor employed for exclusive use with the paper loading mechanism controls the paper loading system and the pump system. Phase A CR Motor runs forward...
Page 45 EPSON Stylus Photo 925 Revision A Home Position Detection The home position is detected based on the pulse output from the linear scale and the DC motor drive current. The basic sequence for home position detection is as follows: Phase A The linear encoder pulse counter in the CPU is reset by initialization executed at power on.
Page 46 EPSON Stylus Photo 925 Revision A PF MOTOR DRIVER CIRCUIT Figure below shows the outline of the PF motor drive circuit. Phase A PF Motor runs forward Phase B (Rotor rotates clockwise) +42V PF Encoder (CN12) Phase A PF Motor runs backward...
Page 47: Asf/Pump Motor Drive Circuit
EPSON Stylus Photo 925 Revision A 2.2.2.3 ASF/Pump Motor Drive Circuit 2.2.2.4 Cutter Motor Drive Circuit The ASF/Pump Motor is a 4-phase 48-pole PM type stepping motor. The Motor Driver Like for the CR Motor and PF Motor, a DC motor is used as the motor for the cutter IC (12 IC) drives the ASF/Pump Motor.
Page 48: Sensor Circuit
EPSON Stylus Photo 925 Revision A 2.2.2.5 Sensor Circuit PE Sensor This sensor, using a photo-interrupter system, consists of the photo-interrupter This printer is equipped with some types of sensors to detect various printer conditions. components and detection lever. This sensor outputs the LOW signal when there is The major sensors are as follows: paper in the paper path.
Page 49 EPSON Stylus Photo 925 Revision A PF Encoder The PF Encoder consists of the loop scale mounted at the left end of the PF roller shaft and a transmission type photosensor. It has the maximum resolution of 1/180 inch and outputs to the CPU the High signal through a black slit on the loop scale and the Low signal through a transparent slit.
Page 50: Troubleshooting
C H A P T E R TROUBLESHOOTING...
Page 51: Overview
EPSON Stylus Photo 925 Revision A 3.1 Overview Table 3-1 Motor, Coil Resistance Motor Location Check Points Resistance This chapter describes how to identify troubles in two levels: unit level repair and Ω± component level repair. Refer to the flowchart in this chapter to identify the defective...
Page 52: Troubleshooting With Led Error Indications And Epson Status Monitor 3 Messages
3.2 Troubleshooting with LED Error Indications and EPSON Status Monitor 3 Messages This section describes the LCD indications and EPSON Status Monitor 3 messages which can appear when the corresponding errors are detected during operation of the printer (turning power on, paper loading/paper feeding or ink suction operation). This section also describes the conditions under which an error detection occurs.
Page 53 EPSON Stylus Photo 925 Revision A Table 3-3. LED Error Indications and EPSON Status Monitor 3 Messages Printer Status LED Indication LCD Indication EPSON Status Monitor 3 Condition for Error Detection Paper jam or Roll paper Blink Roll paper has been backed out of the printer...
Page 54 EPSON Stylus Photo 925 Revision A Table 3-3. LED Error Indications and EPSON Status Monitor 3 Messages Printer Status LED Indication LCD Indication EPSON Status Monitor 3 Condition for Error Detection Cutter error (position) Cutter error. Turn the printer off, and remove This error display occurs in either of the following any jammed paper.
Page 55 EPSON Stylus Photo 925 Revision A Table 3-3. LED Error Indications and EPSON Status Monitor 3 Messages Printer Status LED Indication LCD Indication EPSON Status Monitor 3 Condition for Error Detection Ink out (black) Ink icon (black) Black ink out.
Page 56 EPSON Stylus Photo 925 Revision A Table 3-3. LED Error Indications and EPSON Status Monitor 3 Messages Printer Status LED Indication LCD Indication EPSON Status Monitor 3 Condition for Error Detection Communication error This error display occurs when the printer can not communicate with the PC.
Page 57 EPSON Stylus Photo 925 Revision A Table 3-3. LED Error Indications and EPSON Status Monitor 3 Messages Printer Status LED Indication LCD Indication EPSON Status Monitor 3 Condition for Error Detection Ink cartridge recognition Blink This error display occurs if any abnormal ink cartridge error before initial ink has been detected at initial ink cartridge.
Page 58: Unit Level Troubleshooting
CR Motor. There are three possible causes of breakdown of the CR Motor. using the check list below. When an EPSON Status Monitor 3 message appears with the printer connected to the PC, the total repair time can be shortened by consulting the message.
Page 59 EPSON Stylus Photo 925 Revision A Table 3-4 Check Points for Fatal Errors (continued) Unit/part in Observation LCD Indication Check Points Remedy Question CR Unit hits against the right or General error. Turn CR Encoder 1. Check to see if the CR Encoder Board has been 1.
Page 60 EPSON Stylus Photo 925 Revision A Table 3-5 Check Points for “Paper Jam” Error Unit/part in Observation LCD Indication Check Points Remedy Question By judging that there is paper, paper Roll paper has LD Roller Shaft 1. Check to see if the torsion spring 0.22 comes off on the 1.
Page 61 EPSON Stylus Photo 925 Revision A Table 3-5 Check Points for “Paper Jam” Error (continued) Unit/part in Observation LCD Indication Check Points Remedy Question Paper is not ejected completely and Roll paper has Front Frame 1. Check to see if the Star Wheel Roller is out of position.
Page 62 EPSON Stylus Photo 925 Revision A Table 3-6 Check Points for “Paper Out” Error Unit/part in Observation LCD Indication Check Points Remedy Question Although the LD Roller rotates Paper is not set ASF Unit 1. During paper feed operation, check to see if the Hopper 1.
Page 63 EPSON Stylus Photo 925 Revision A Table 3-6 Check Points for “Paper Out” Error(continued) Unit/part in Observation LCD Indication Check Points Remedy Question Although the ASF Motor runs, the Paper is not set Clutch Mechanism 1. Check to see if the tension spring 0.143 comes off in the 1.
Page 64 EPSON Stylus Photo 925 Revision A Table 3-6 Check Points for “Paper Out” Error(continued) Unit/part in Observation LCD Indication Check Points Remedy Question LD Roller attempt to load the Paper is not set LD Roller 1. Check to see if paper dust is adhering to the surface of 1.
Page 65 EPSON Stylus Photo 925 Revision A Table 3-7 Check Points for Cutter Error Unit/part in Observation LED Indication Check Points Remedy Question Abnormal sound is heard “Unable to cut. Turn the printer Cutter Unit 1. Check to see if the fixed cutting edge is damaged.
Page 66 PC. the PC. to the printer. Printer driver 1. Check to see if the Stylus Photo 925 printer driver is 1. Install the Stylus Photo 925 printer driver. used. Troubleshooting Unit Level Troubleshooting...
Page 67 1. Replace the Ink Cartridge with a new one. Printer does not execute ink installing it in another printer. replacement CL and error display by LED and EPSON Status Monitor 3 occurs. [“No Ink” error] Ink Cartridge 1. Check to see if ink is remaining in the ink cartridge.
Page 68 EPSON Stylus Photo 925 Revision A Table 3-11 Check Points for Abnormal Sound Unit/part in Observation LCD Indication Check Points Remedy Question Although printing operation is CR Unit 1. Check to see if grease has been applied sufficiently to 1. Wipe the grease from the CR Guide Shaft and carried out normally, abnormal the CR Guide Shaft.
Page 69 EPSON Stylus Photo 925 Revision A Table 3-12 Check Points for Poor Print Quality Unit/Part in Observation Check Points Remedy Indication Question [Observation 1] Cap Unit 1. Check to see if there is any foreign material around the seal 1. Remove the foreign material around the seal In the CL sequence, the Pump Unit seems rubber parts on the cap assembly.
Page 70 EPSON Stylus Photo 925 Revision A Table 3-12 Check Points for Poor Print Quality (continued) Unit/Part in Observation Check Points Remedy Indication Question [Observation 6] Cap Unit 7. Check to see if the Slider Lock Lever is damaged. 7. Replace the Cap Unit with a new one.
Page 71 EPSON Stylus Photo 925 Revision A Table 3-12 Check Points for Poor Print Quality (continued) Unit/Part in Observation Check Points Remedy Indication Question Ditto Front Frame 1. Check to see if grease has been applied sufficiently to the 1. Clean the surface of the CR Guide Shaft with Front Frame.
Page 72 EPSON Stylus Photo 925 Revision A Table 3-12 Check Points for Poor Print Quality (continued) Unit/Part in Observation Check Points Remedy Indication Question Printing operation is carried out normally. LD Roller Unit 1. Check to see if paper dust is adhering to the surface of the Set a cleaning sheet in the ASF up side down.
Page 73: Disassembly And Assembly
C H A P T E R DISASSEMBLY AND ASSEMBLY...
Page 74: Overview
EPSON Stylus Photo 925 Revision A 4.1 Overview 4.1.1 Precautions See the precautions given under the handling “WARNING” and “CAUTION” in the This section describes procedures for disassembling the main components of the following column when disassembling or assembling the product.
Page 75 EPSON Stylus Photo 925 Revision A Avant de commencer, assurez vous que l’imprimante soit eteinte To protect sensitive microprocessors and circuitry, use static W A R N I N G C A U T I O N et que le cordon d’alimentation soit debranche.
Page 76: Tools
EPSON Stylus Photo 925 Revision A 4.1.2 Tools Table 4-2. Screws (continued) Description Appearance Use only specified tools to avoid damaging the printer. C.B.S.-TITE (P4), 3x6, F/ZN Table 4-1. Tools Name Supplier Parts No. C.B.P.-TITE SCREW, 3x6, F/ZN Phillips Screw Driver (No.1)
Page 77: Work Completion Check
EPSON Stylus Photo 925 Revision A 4.1.3 Work Completion Check Table 4-3. Completion Check (continued) Category Item Check Point Status If any service is made to the printer, use the checklist shown below to confirm all works are completed properly and the printer is ready to be returned to the user.
Page 78: Disassembly
EPSON Stylus Photo 925 Revision A 4.2 Disassembly The flowchart below shows step-by-step disassembly procedures. When disassembling each unit, refer to the page number shown in the figure. Housing removal page 79 Panel Unit CR Unit removal Housing Lower Cover...
Page 79: Housing Removal
EPSON Stylus Photo 925 Revision A 4.2.1 Housing removal Remove the three screws (C.B.S SCREW, 3x6, F/ZN) securing the Housing at the rear of the printer. Open the printer cover and remove the two screws (C.B.S TITE-R SCREW, 3x6, F/UC) securing the Housing in the front of the printer body.
Page 80 EPSON Stylus Photo 925 Revision A Remove the four screws (C.B.P-TITE SCREW, 3x8, F/ZN) securing the Housing Tightening torque for screws Cover and remove the Housing Cover. • Two screws in the front of housing: C.B.S TITE-R SCREW, 3x6, F/UC: 5 ~ 7 kgf.cm •...
Page 81: Panel Unit Removal
EPSON Stylus Photo 925 Revision A 4.2.2 Panel Unit removal The buttons will come off when the Panel Unit is removed from Remove the Housing from the printer. (Refer to 4.2.1 “Housing removal”) the Housing. In installation, locate the buttons as shown below.
Page 82: Housing Lower Covers Removal
EPSON Stylus Photo 925 Revision A 4.2.3 Housing Lower Covers removal Remove the three screws (C.B.P-TITE SCREW, 3x8, F/ZN) securing the Housing Lower Cover Left Rear and remove the Housing Lower Cover Left Rear. There are two housing lower covers on each of the right and left sides of the printer to protect the printer mechanism.
Page 83: Housing Lower Cover Right Rear And Front Removal
EPSON Stylus Photo 925 Revision A 4.2.3.2 Housing Lower Cover Right Rear and Front removal Tightening torque for screws Remove the Housing from the printer. (Refer to 4.2.1 “Housing removal”) • Five screws securing the Housing Lower Cover Left Rear/Front: C.B.P-TITE SCREW, 3x8, F/ZN...
Page 84 EPSON Stylus Photo 925 Revision A Remove the four screws (C.B.S SCREW, 3x6, F/ZN and C.B.S SCREW, 3x4, F/ Install the Housing Lower Cover Right Front so that the ZN) securing the Housing Lower Cover Right Front. projection as shown below is positioned inside.
Page 85: Print Head Removal
EPSON Stylus Photo 925 Revision A 4.2.4 Print Head removal Remove the two screws (C.B.P.-TITE SCREW, 3x8, F/ZN and B-TITE SEMS W2 2.5x5, F/ZB) securing the Print Head to the CR Unit. Remove the Housing from the printer. (Refer to 4.2.1 “Housing removal”) Set the PG Lever in the rear position.
Page 86 EPSON Stylus Photo 925 Revision A When installing the Print Head on the CR Unit, make sure that Tightening torque for screws A D J U S T M E N T the Head Grounding Plate is installed on the CR Unit properly R E Q U I R E D •...
Page 87: Cr Unit Removal
EPSON Stylus Photo 925 Revision A 4.2.5 CR Unit removal Driven Pulley Holder Remove the Housing from the printer. (Refer to 4.2.1 “Housing removal”) Disconnect the Print Head FFC from the CR unit. (See steps 2 ~ 7 in 4.2.4 “Print Head removal”)
Page 88 EPSON Stylus Photo 925 Revision A Disengage the hooks which fasten the PG Lever Complement to the CR Guide Although removing the CR Guide Shaft only is possible, never Shaft, and take out the PG Lever Complement and belleville spring.
Page 89 EPSON Stylus Photo 925 Revision A Once the Print Head has been removed from the CR Unit, make When installing the PG Lever on the Main Frame, set the certain at reinstallation that the Head Grounding Plate has been Torsion Spring in the position as shown below properly.
Page 90: Cr Encoder Board Removal
EPSON Stylus Photo 925 Revision A 4.2.6 CR Encoder Board removal Tightening torque for screws Remove the Housing from the printer. (Refer to 4.2.1 “Housing removal”) • One screw securing the Parallelism Adjusting Bush: C.B.S.-TITE (P4), 3x6, F/ZN : 6 ~ 8kgf.cm Remove the CR unit from the printer.(Refer to 4.2.5 “CR Unit removal”)
Page 91: Ld Roller Removal
EPSON Stylus Photo 925 Revision A 4.2.7 LD Roller removal While placing the ASF Hopper in the ASF Frame, disengage the hooks of the LD Roller Shaft Holder by pulling them up and remove it. Remove the Housing from the printer. (Refer to 4.2.1 “Housing removal”) Take the Head FFC off from the Head FFC holder located along the LD roller shaft holder.
Page 92 EPSON Stylus Photo 925 Revision A When connecting the cable to the connector of the PE Sensor, Before installing the LD Roller, make certain that the projection fasten the cable to the LD Roller Shaft Holder as shown below. of the LD Roller is fit in the round hole of the clutch as shown below.
Page 93 EPSON Stylus Photo 925 Revision A When installing the LD Roller Shaft Holder on the printer Tightening torque for screws mechanism, take care not to damage the teeth of the spur gear • One screw securing the Head FFC Grounding Plate: 35.2 or spur gear 23.2.
Page 94: Pe Sensor Removal
EPSON Stylus Photo 925 Revision A 4.2.8 PE Sensor removal Make sure that the Torsion spring 0.22 is hung to the following C H E C K Remove the Housing from the printer. (Refer to 4.2.1 “Housing removal”) suitable position.
Page 95: Asf Unit Removal
EPSON Stylus Photo 925 Revision A 4.2.9 ASF Unit removal Pull off the spur gear 23.2 mounted at the right side of the ASF Unit. Remove the Housing from the printer. (Refer to 4.2.1 “Housing removal”) Remove the LD roller shaft holder from the printer. (Refer to 4.2.7 “LD Roller Spur Gear 23.2...
Page 96 EPSON Stylus Photo 925 Revision A Align the cut portions found at the rear of the ASF Unit, and separate the ASF 10. Remove the Pad holder (Paper return plate) from the ASF frame Frame and ASF Hopper. Pad Holder...
Page 97 EPSON Stylus Photo 925 Revision A When installing the Torsion Spring 32.7, make sure that the spring is set properly in the grooves of the ASF Frame and Pad Holder and the Pad Holder moves smoothly. To secure the ASF Unit to the printer body, tighten the screws in the numerical order as shown below.
Page 98: Waste Drain Ink Pad Unit Removal
EPSON Stylus Photo 925 Revision A 4.2.10 Waste Drain Ink Pad Unit removal The Waste Drain Ink Pad is composed as shown below. In Remove the one screw (C.B.P-TITE SCREW, 3x8, F/ZN) found at the button of installation, take care not to confuse the positions of the Waste the printer body, and remove the Waste Drain Ink Pad Unit.
Page 99: Cr Motor Removal
EPSON Stylus Photo 925 Revision A 4.2.11 CR Motor removal Remove the two screws (C.P. SCREW, 3x4, F/ZN) while holding the CR Motor, and remove the CR Motor. Remove the Housing from the printer. (Refer to 4.2.1 “Housing removal”) Disconnect the CR motor connector cable from the CN14 on the Main board with tweezers C.P.
Page 100: Asf Motor Removal
EPSON Stylus Photo 925 Revision A 4.2.12 ASF Motor removal 4.2.13 Cutter Unit removal 1. Remove the housing from the printer. (Refer to 4.2.1 “Housing removal”) Remove the housing from the printer. (Refer to 4.2.1 “Housing removal”) Disconnect the ASF motor connector cable from the CN11 on the Main board with Remove the housing lower cover from the printer.
Page 101 EPSON Stylus Photo 925 Revision A Remove the five screws (C.B.S SCREW, 3x4, F/ZN and C.B.S SCREW, 3x6, F/ Move the CR Unit to the left end, and remove the Cutter Unit in the numerical order as ZN) securing the Cutter Unit.
Page 102: Circuit Board Unit Removal
EPSON Stylus Photo 925 Revision A 4.2.14 Circuit Board Unit removal Remove the 17 screws (C.B.S-TITE SCREW, 3x6, F/ZN) securing the Shield Plate to the Circuit Board Unit, and remove the Shield Plate. Remove the housing from the printer. (Refer to 4.2.1 “Housing removal”) Remove the housing lower cover from the printer.
Page 103 EPSON Stylus Photo 925 Revision A Remove the three screws (C.P SCREW, 3x6, F/ZN and C.P SCREW, 2.5x6 F/ZN) Remove the four screws (C.B.S. SCREW, 3x6, F/ZN) securing the Power Supply securing the Main Board to the Shield Plate. Board to the Shield Plate, and remove the Power Supply Board.
Page 104 EPSON Stylus Photo 925 Revision A When replacing the Main board with a new one, perform the A D J U S T M E N T Tightening torque for screws following service items: R E Q U I R E D •...
Page 105: Ink System Unit Removal
EPSON Stylus Photo 925 Revision A 4.2.15 Ink System Unit removal Remove the four screws (C.B.S. SCREW, 3x6, F/ZN and C.B.S. SCREW, 3x4, F/ UC) securing the Ink System Frame to the Main Frame. Remove the Housing from the printer. (Refer to 4.2.1 “Housing removal”) Remove the Housing lower cover from the printer.
Page 106 EPSON Stylus Photo 925 Revision A When installing the Cap Unit on the Ink System Frame, insert When replacing the cleaner head built in the Pump unit, be C A U T I O N the ink tube into the Cap Unit properly and pass the ink tube careful of the following points.
Page 107 EPSON Stylus Photo 925 Revision A Make certain that all the gears have been installed on the shaft of the Ink System Frame, and rotate the combination gear 9.6, 24 to check for smooth motion of the CR Lock Lever.
Page 108: Pf Motor Removal
EPSON Stylus Photo 925 Revision A 4.2.16 PF Motor removal PF Scale Remove the Housing from the printer. (Refer to 4.2.1 “Housing removal”) Remove the three screws (C.B.P-TITE SCREW, 3x8, F/ZN) securing the Housing Lower Cover Left Rear and remove the Housing Lower Cover Left Rear.
Page 109 EPSON Stylus Photo 925 Revision A Remove the two screws (C.P. SCREW, 3x4, F/ZN) securing the PF Motor, and Install the PF Scale on the PF Roller Gear properly by referring remove the PF Motor. to 4.2.18.1 “PF Scale installation”.
Page 110: Paper Eject Roller Removal
EPSON Stylus Photo 925 Revision A 4.2.17 Paper Eject Roller removal 10. Turn upward the left bush to unfasten the Paper Eject Roller from the Main Frame. 1. Remove the Housing from the printer. (Refer to 4.2.1 “Housing removal”) Bush Remove the CR unit from the printer.
Page 111 EPSON Stylus Photo 925 Revision A 12. Remove the Paper Eject Roller from the hooks on the Paper Guide Front. When installing the Front Frame, tighten the screws in the numerical order as shown below. Hooks Figure 4-80. Removing the Paper Eject Roller Figure 4-81.
Page 112: Pf Roller Removal
EPSON Stylus Photo 925 Revision A 4.2.18 PF Roller removal Release the PF Grounding Spring at the left side of the Paper Guide Front from the Main Frame, and lift the left side of the Paper Guide Front and remove it.
Page 113 EPSON Stylus Photo 925 Revision A 11. Position the left bush of the PF Roller in the cut area of the Main Frame as shown below, and pull off the PF Roller, together with the left bush, to the left.
Page 114 EPSON Stylus Photo 925 Revision A Install the Paper Guide Top on the Main Frame by the 2. Install the Paper Guide Top on the Main Frame by following procedure described below: the steps as shown below with arrows, and release the torsion spring from the hook.
Page 115: Pf Scale Installation
EPSON Stylus Photo 925 Revision A 4.2.18.1 PF Scale installation After installing the Paper Guide Front on the Main Frame, make This section describes the installation procedures for the following parts: certain that the hook and projections at the right side of the Paper Guide Front are fixed at the correct positions.
Page 116 EPSON Stylus Photo 925 Revision A With the characters-readable side down, stick the PF Scale on the Scale Mounting Peel the backing paper off the D50 tape and stick the tape on the PF Scale. Plate. D50 Tape Protective backing...
Page 117 EPSON Stylus Photo 925 Revision A Align the projections of the spur gear 73.6 with the round holes in the PF Scale, and put the PF Scale on the PF Scale Shaft with care not to slant the PF Scale. At Make sure that the two projections of the spur gear 73.6 are...
Page 118: Adjustment
C H A P T E R ADJUSTMENT...
Page 119: Outline
This section describes the adjustments that are required after repair or replacement of 2. Initial Charge specific parts of Stylus Photo 925. Some adjustments must be performed by specified 3. Bi-D adjustment procedures. Therefore, observe the instructions given in “CAUTION” below and 4.
Page 120: Adjustment
EPSON Stylus Photo 925 Revision A 5.2 Adjustment Make setting so that the marking on the Left/Right Parallelism Adjustment Bushing is This section describes the procedure for each adjustment. positioned at the projection on the frame. 5.2.1 Parallel adjustor Mark...
Page 121 EPSON Stylus Photo 925 Revision A Move the carriage to the center of the printer and place a thickness gauge for 1.2 mm as Turn the Right Parallelism Adjustment Bushing toward you to a position where the shown below: print head comes in contact with the thickness gauge. Then turn the Parallelism Adjustment Bushing rearward (in the direction of widening the platen gap) by one tooth and set it there.
Page 122: Adjustment Program
None p.125 Select the model name. Bi-D adjustment A4 normal paper p.126 Select the number of the port to which the Stylus Photo 925 is connected to the USB ID input None p.128 computer. First dot position adjustment A4 plain paper p.129...
Page 123: Eeprom Initialization
EPSON Stylus Photo 925 Revision A 5.3.3 EEPROM initialization It is required to write the initial setting values into EEPROM when the Main Board is replaced. Figure 5-4. Main Menu Do not start up the adjustment program before connecting the C A U T I O N USB cable to the printer.
Page 124: Head Id
EPSON Stylus Photo 925 Revision A 5.3.4 Head ID This adjustment writes the ID numbers for the Print Head into the EEPROM, and enables the current settings to be confirmed. Click on the item to be adjusted, and then click on the [OK] button.
Page 125: Cr Motor Drive Dispersion
EPSON Stylus Photo 925 Revision A 5.3.5 CR Motor drive dispersion Adjustment by executing the CR Motor drive dispersion sequence When not only any of the CR Motor, Main Board and Power Supply Board but also the This function is to make adjustment for the CR Motor once you have replaced any of CR Shaft have been replaced, make adjustment by executing the CR Motor drive the CR Motor, Main Board and Power Supply Board.
Page 126: Bi-D Adjustment
EPSON Stylus Photo 925 Revision A 5.3.6 Bi-D adjustment The Bi-D adjustment pattern includes the items as shown in the sample below: This adjustment prints out a pattern and makes the necessary adjustments to ensure that the pattern is printed correctly. The adjustment is implemented in a print → confirm →...
Page 127 EPSON Stylus Photo 925 Revision A If the lines on the print result of the Bi-D adjustment pattern are out of alignment as If you select “Checking present Bi-D parameter”, you can check the Bi-D adjusted shown below, you must make the adjustment again.
Page 128: Usb Id Input
USB ID] has been selected, the value will be displayed in the center of the screen at the The Stylus Photo 925 is equipped with a USB interface as a standard procedure. As the bottom. If [Input USB ID] has been selected, the following screen will be displayed to USB ID is stored in the EEPROM on the main circuit board, it is necessary to enter the enable the USB ID to be entered.
Page 129: First Dot Position Adjustment
EPSON Stylus Photo 925 Revision A 5.3.8 First Dot Position Adjustment 5.3.9 Cut Position Adjustment With this function, you can adjust the first dot position. This adjustment is not With this function, you can adjust the cut position. necessary for repair, as a rule. However, make this adjustment on user's request.
Page 130: Memory Card Drive Confirmation
EPSON Stylus Photo 925 Revision A 5.3.10 Memory card drive confirmation The error messages in checking the memory card drive and the possible cause of each error are as follows: It is possible to check whether the memory card drive is normal when the Main Board is replaced.
Page 131: Head Cleaning
EPSON Stylus Photo 925 Revision A 5.3.11 Head cleaning 5.3.12 Initial ink charge This function enables the heads to be cleaned forcibly from the operation panel. The This function implements the initial ink replenishment process. execution of this function will improve missing dots.Unused 1/8 ink cartridge The following ink is to be used for ink replenishment.
Page 132: Refurbishment For Doa
EPSON Stylus Photo 925 Revision A 5.3.13 Refurbishment for DOA Click the “EXCHANGE SEQUENCE” in the Transportation Liquid Exchange menu. Exchange sequence 1 If you clean the cavity of the Print Head and cap assembly, this function will be useful.
Page 133: Protection Counter
EPSON Stylus Photo 925 Revision A 5.3.14 Protection counter This function enables the protection counter to be confirmed and to be cleared. Figure 5-29. Clear the protection counter 5.3.15 The number of the cutting operation Figure 5-27. Protection counter With this function, you can check the cutter operation count.
Page 134: Eeprom Backup Data
EPSON Stylus Photo 925 Revision A 5.3.16 EEPROM backup data Upon completion of successful backup, “EEPROM parameter backup is completed” will be displayed in the central lower area on the screen. With this function, when replacing the Main Board, you can read all the information from the old board and write it on the new board.
Page 135: A4 Normal Paper Printing
EPSON Stylus Photo 925 Revision A 5.3.17 A4 normal paper printing This function prints several test patterns on A4 paper. Figure 5-34. A4 normal paper printing For check pattern printing, use one sheet of A4 normal paper. Set a sheet of A4 normal paper on the printer and click the [OK] button, and printing of the check pattern will be started.
Page 136: Eeprom Data
EPSON Stylus Photo 925 Revision A 5.3.18 EEPROM data This function enables the EEPROM data to be checked and data written by specifying the EPPROM address directly, even when an error has been triggered. (However, this function cannot be used when the CPU in the main logic circuit, the I/F receiver, the RAM or the EEPROM have been damaged.) The following menu will be displayed...
Page 137 C H A P T E R MAINTENANCE...
Page 138: Maintenance Overview
EPSON Stylus Photo 925 Revision A 6.1 Overview 6.1.2 Cleaning This printer has no mechanical components which require regular cleaning except the This section provides information to maintain the printer in its optimum condition. Print Head. Therefore, when returning the printer to the user, check the following parts and perform appropriate cleaning if stain is noticeable.
Page 139: Service Maintenance
EPSON Stylus Photo 925 Revision A 6.1.3 Service Maintenance Lubrication The characteristics of the grease have great affects on the mechanical function and If print irregularity (missing dot, white line, etc.) has occurred or the printer indicates durability, especially does the characteristics about temperature environment. The type “Maintenance Error”, take the following actions to clear the error.
Page 140 EPSON Stylus Photo 925 Revision A Table 6-2.Lubrication Point (continued) Table 6-2.Lubrication Point Lubrication Type/Point Remarks Lubrication Type/Point Remarks <Lubrication Point> • Apply grease <Lubrication Point> • Apply with a properly to the dropping pipet. Part of the gear (spur gear 35.2) of the clutch mechanism •...
Page 141 EPSON Stylus Photo 925 Revision A Table 6-2.Lubrication Point (continued) Table 6-2.Lubrication Point (continued) Lubrication Type/Point Remarks Lubrication Type/Point Remarks <Lubrication Point> • Lubricate with a <Lubrication Point> • Apply with a brush. dropping pipet. • Shaft for the combination gear 9.6, 24 on the ink system •...
Page 142 EPSON Stylus Photo 925 Revision A G-26 G-26 Figure 6-4. Lubrication point 3 Figure 6-2. Lubrication point 1 G-56 G-26 Figure 6-5. Lubrication point 4 Figure 6-3. Lubrication point 2 Maintenance Overview...
Page 143 EPSON Stylus Photo 925 Revision A G-26 G-26 Figure 6-6. Lubrication point 5 Figure 6-8. Lubrication point 7 G-26 G-26 Figure 6-7. Lubrication point 6 Figure 6-9. Lubrication point 8 Maintenance Overview...
Page 144 EPSON Stylus Photo 925 Revision A G-26 G-26 Figure 6-10. Lubrication point 9 Figure 6-12. Lubrication point 11 G-26 G-26 Figure 6-11. Lubrication point 10 Figure 6-13. Lubrication point 12 Maintenance Overview...
Page 145 EPSON Stylus Photo 925 Revision A G-26 Figure 6-14. Lubrication point 13 G-26 Figure 6-15. Lubrication point 14 Maintenance Overview...
Page 146: Appendix
C H A P T E R APPENDIX...
Page 147: Connector Summary
EPSON Stylus Photo 925 Revision A 7.1 Connector Summary See Table 7-1 below for the connector summary for the C475 MAIN board and each connector's pin alignment. 7.1.1 Major Component Unit Table 7-1.Connector Summary for C475 MAIN The Major component units of this printer are as follows.
Page 148: Asp List
EPSON Stylus Photo 925 Revision A 7.2 ASP List Table 7-2.ASP List (continued) Ref No. Part Name Table 7-2 below lists the After-sale Service Parts: BUTTON,CANCEL;B BUTTON,PS;B Table 7-2.ASP List BUTTON,MEMORY;B Ref No. Part Name OPTECAL TUBE,PANEL INDIVIDUAL CARTON BOX FOR EUROPE COVER,COLOR,LCD;C...
Page 149 EPSON Stylus Photo 925 Revision A Table 7-2.ASP List (continued) Table 7-2.ASP List (continued) Ref No. Part Name Ref No. Part Name LEVER,CHANGE ROLLER EJ ASSY,. COMPRESSION SPRING,2.94;B FRAME,FRONT MOTOR ASSEMBLY,ASF STARWHEEL ASSY,.FRONT BUSHING,PARALLELISM ADJUST,LEFT STARWHEEL ASSY,.REAR SHAFT,PULLEY,DRIVEN SPUR GEAR,19.2...
Page 150 EPSON Stylus Photo 925 Revision A Table 7-2.ASP List (continued) Table 7-2.ASP List (continued) Ref No. Part Name Ref No. Part Name ASF ASSY,. PLATE SPRING,COVER,CARTRIDGE GROUNDING PLATE,P/B,UPPER +.BIND B-TITE SEMS W2,2.5x5,F/ZB CLEANER,HEAD,ASP FRAME,ROLL PAPER,LEFT;E ASSY SHIELD PLATE,P/B,UPPER FRAME,ROLL PAPER,RIGHT;E ASSY...
Page 151: Exploded Diagrams
EPSON Stylus Photo 925 Revision A 7.3 Exploded Diagrams Exploded diagrams for Stylus Photo 925 are shown on the following pages. Appendix Exploded Diagrams...
Page 152 EPSON Stylus Photo 925 Revision A EPSON STYLUS PHOTO 925 No.1 Rev.01 C475 C475-CASE-003 Appendix Exploded Diagrams...
Page 153 EPSON Stylus Photo 925 Revision A EPSON STYLUS PHOTO 925 No.2 Rev.01 C475 C475-CASE-004 Appendix Exploded Diagrams...
Page 154 EPSON Stylus Photo 925 Revision A EPSON STYLUS PHOTO 925 No.3 Rev.01 C475 C475-ELEC-001 Appendix Exploded Diagrams...
Page 155 EPSON Stylus Photo 925 Revision A EPSON STYLUS PHOTO 925 No.4 Rev.02 C475 C475-MECH-0011 Appendix Exploded Diagrams...
Page 156 EPSON Stylus Photo 925 Revision A EPSON STYLUS PHOTO 925 No.5 Rev.02 C475 C475-MECH-0021 Appendix Exploded Diagrams...
Page 157 EPSON Stylus Photo 925 Revision A EPSON STYLUS PHOTO 925 No.6 C475-MECH-003 Rev.01 C475 Appendix Exploded Diagrams...
Page 158 EPSON Stylus Photo 925 Revision A 723 741 EPSON STYLUS PHOTO 925 No.7 Rev.02 C475 C475-MECH-0041 Appendix Exploded Diagrams...
Page 159 EPSON Stylus Photo 925 Revision A EPSON STYLUS PHOTO 925 No.8 Rev.01 C475 C475-MECH-005 Appendix Exploded Diagrams...
Page 160 EPSON Stylus Photo 925 Revision A EPSON STYLUS PHOTO 925 No.10 Rev.01 C475 C475-POWE-001 Appendix Exploded Diagrams...
Page 161 EPSON Stylus Photo 925 Revision A EPSON STYLUS PHOTO 925 (EAI Specitication) No.9 C475-PACK-002 Rev.01 C475 Appendix Exploded Diagrams...
Page 162 EPSON Stylus Photo 925 Revision A 400 without ETT(AC110V) EPSON STYLUS PHOTO 925 (All branches except EAI) No.9 C475-PACK-003 Rev.01 C475 Appendix Exploded Diagrams...
Page 163: Electrical Circuits
EPSON Stylus Photo 925 Revision A 7.4 Electrical Circuits The electrical circuit diagrams for the following circuit boards are shown on the following pages. C475 MAIN control circuit board C408 PSB/PSE circuit board C475 PNL Panel circuit board Appendix Electrical Circuits...

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