Sharp UX-B20 Service Manual

Hide thumbs Also See for UX-B20:

Operation manual (104 pages)

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

Table of Contents

Quick Links

Summary of Contents for Sharp UX-B20

Page 1: Table Of Contents
UX-B20U/UX-B20C/B25C SERVICE MANUAL No. 00ZUXB20U/SME FACSIMILE UX-B20 UX-B25 MODEL MODEL SELECTION CODE DESTINATION UX-B20 U.S.A. UX-B20/B25 Canada Illustration: UX-B20U CONTENTS CHAPTER 1. GENERAL DESCRIPTION Circuit description of control PWB ....5-2 Specifications ..........1-1 Circuit description of LIU PWB ....5-15 Operation panel........
Page 2 UX-B20U/UX-B20C/B25C – i –...
Page 3: Chapter 1. General Description
(i.e., ITU-T phase C time only). As a part of our policy of continuous improvement, SHARP reserves the right to make design and specification changes for product improvement without prior notice. The performance specifications figures indicated are nominal values of production units. There may be some deviations from these values in individual units.
Page 4: Operation Panel
UX-B20U/UX-B20C/B25C [2] Operation panel RESOLUTION/ RECEPTION 8 9 10 11 12 13 Illustration: UX-B20U 1. Display 8. POLL key This displays messages and prompts to help you operate the Press this key after dialing another fax machine to receive a document (previously loaded in the other machine's feeder) machine.
Page 5: Transmittable Documents
UX-B20U/UX-B20C/B25C [3] Transmittable documents 5. Automatic Document Feeder Capacity Number of pages that can be placed into the feeder at anytime is as 1. Document Sizes follows: Normal size: max. ADF 10 pages Normal size Width 148 - 216 mm Special size: single sheet only (manual feed) Length 140 - 279 mm...
Page 6: Installation
UX-B20U/UX-B20C/B25C [4] Installation 2) Open the print compartment cover. 1. Site selection Take the following points into consideration when selecting a site for this model. ENVIRONMENT • The machine must be installed on a level surface. • Keep the machine away from air conditioners, heaters, direct sun- light, and dust.
Page 7: Connecting The Power Cord
UX-B20U/UX-B20C/B25C 4. Attaching the paper tray 2) Insert the stack of paper into the tray, PRINT SIDE UP. • If paper remains in the tray, take it out and combine it into a sin- 1) Attach the paper tray. gle stack with the new paper. •...
Page 8: Installing The Print Cartridge
7. Installing the print cartridge 3) Open the print compartment cover. Follow these steps to install or replace the print cartridge. • When replacing the print cartridge, be sure to use a SHARP UX- C70B cartridge. Print cartridge yield (at 4% coverage) Initial cartridge Quality mode OFF: Approx.
Page 9 UX-B20U/UX-B20C/B25C 6) Insert the new print cartridge into the cartridge holder. 10)Press to make the print cartridge holder return to its home position. CHANGE CARTRIDGE 1=NEW, 2=OLD 11)Press (NEW) if the cartridge you installed is new. Press (OLD) if the cartridge you installed is old. 7) Place your index finger on the tab as shown and close the cartridge holder cover with your thumb.
Page 10: Setting The Paper Size
UX-B20U/UX-B20C/B25C 15)Press the number keys to enter the number of the straightest line. 10. High-quality fax print setting (fast/slow printing of faxes) Example: The high-quality fax print setting controls the speed at which faxes are printed. If you prefer a higher quality image at a slower printing speed, •...
Page 11 UX-B20U/UX-B20C/B25C 12. Clearing a jammed document 13. Clearing jammed printing paper If the original document doesn’t feed properly during transmission or Gently pull the jammed paper out of the machine, taking care not to copying, or DOCUMENT JAMMED appears in the display, first try tear it.
Page 12: Quick Setup Guide
UX-B20U/UX-B20C/B25C [5] Quick setup guide 2. Open the print 3. Remove the 4. Close the print 5. Close the 1. Open the packing tape. compartment cover. compartment cover. operation panel. operation panel. IMPORTANT!! Should you require any assistance setting up or operating your product, please Connect the handset.
Page 13: Quick Reference Guide
UX-B20U/UX-B20C/B25C [6] Quick reference guide 3. Storing Auto Dial Numbers 1. Sending Faxes 1. Press once and twice. Place your document (up to 10 pages) face down in the document 2. Enter the full fax number. feeder. 3. Press START/ MEMORY 4.
Page 14: Volume Adjustments
UX-B20U/UX-B20C/B25C UX-B20U/UX-B20C/B25C Service Manual Service Manual Market CHAPTER 2. ADJUSTMENTS 4. Settings 4.1. Dial mode selector [1] Adjustments DIAL mode (Soft Switch No. SW-B4 Data No. 3) 1. General (step 1) Select "OPTION SETTING". Since the following adjustments and settings are provided for this KEY : FUNCTION model, make adjustments and/or setup as necessary.
Page 15: Diagnostics And Service Soft Switch
UX-B20U/UX-B20C/B25C [2] Diagnostics and service soft switch 1. Entering the diagnostic mode Press FUNC → 9 → → 8 → # → 7 , and the following display will appear. After 2 sec: DIAG MODE ROM Ver. TC25 or TC44 TC25 (UX-B20U) TC44...
Page 16 UX-B20U/UX-B20C/B25C 3. Diagnostic items description 3.6. Signal send mode This mode is used to send various signals to the circuit during FAX 3.1. Soft switch mode communication. Every push of START key sends a signal in the follow- Used to change the soft switch settings. ing sequence.
Page 17 UX-B20U/UX-B20C/B25C 4. Entering the printer diagnostic mode Press FUNC 6 , and the following display will appear. PRINT DIAG MODE Then press the START key. Select the desired item with the up key or the down key or select with the rapid key. Enter the mode with the START key. (Diag·...
Page 18 UX-B20U/UX-B20C/B25C 6.6. IJP list mode Maintenance data of the printer is output. [Details of maintenance data] Item Clear timing Update timing Dot counter At the replacement cartridge After printing Page counter At the replacement cartridge After printing Number of head cleaning (Wiping of cartridge) At the initial cartridge setting At the maintenance Replacement counter of the cartridge...
Page 19 UX-B20U/UX-B20C/B25C 7. How to make soft switch setting To enter the soft switch mode, press the following key entries in sequence. Press FUNCTION START START DATA No. 1 2 3 4 5 6 7 8 S F T SW-A1 = 0 0 0 0 0 0 0 0 Press FUNCTION key.
Page 20 UX-B20U/UX-B20C/B25C 8. Soft switch description 8.1. Soft switch Switch setting and function Initial setting DATA ITEM Remarks Protect from echo Forced 4800 BPS reception Footer print Length limitation of copy/send/ No limit Copy/send: 60 cm receive Receive: 1 m CSI transmission No transmitted Transmitted DIS receive acknowledgement dur-...
Page 21 Equalizer freeze control 7200 BPS only CNG transmission in manual TX mode Initial compression scheme for MR mode H2 mode sharp fax in TX mode Modem speed automatic fallback when RX level is under -40dBm Recall interval Binary input No. = 8 EX 0 eg.
Page 22 UX-B20U/UX-B20C/B25C DATA Switch setting and function Initial setting ITEM Remarks DTMF signal transmission level (Low) Binary input No. = 16 8 4 2 1 2 3 4 5 (n x 0.5dBm) EX 0 0 1 1 0 eg. Signal transmission level is set to -3dBm. Reserved Reserved Reserved...
Page 23 UX-B20U/UX-B20C/B25C DATA Switch setting and function Initial setting ITEM Remarks Cl off detection timer (0-1550ms set- ting by 50ms step) Binary input No. = 16 8 4 2 1 2 3 4 5 (n x 50ms) EX 0 1 1 1 0 eg.
Page 24 UX-B20U/UX-B20C/B25C DATA Switch setting and function Initial setting ITEM Remarks CNG detection in STAND-BY mode OPTION Reserved Reserved Number of CNG detect (STAND-BY 1pulse 2pulses 3pulses 4pulses mode) No. 4 No. 5 Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved...
Page 25 UX-B20U/UX-B20C/B25C DATA Switch setting and function Initial setting ITEM Remarks Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved...
Page 26 UX-B20U/UX-B20C/B25C DATA Switch setting and function Initial setting ITEM Remarks Reserved Reserved Sender’s phone number setting Cannot change Change allowed Reserved Reserved Summer time setting OPTION Ringer volume Middle High OPTION No. 7 No. 8 Speaker volume (3 stages) Middle High OPTION No.
Page 27 UX-B20U/UX-B20C/B25C DATA Switch setting and function Initial setting ITEM Remarks Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved...
Page 28 UX-B20U/UX-B20C/B25C DATA Switch setting and function Initial setting ITEM Remarks Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved...
Page 29 UX-B20U/UX-B20C/B25C DATA Switch setting and function Initial setting ITEM Remarks Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Ink save mode OPTION Half tone copy ink save mode print- ing fixed Reserved Reserved Reserved Reserved...
Page 30 UX-B20U/UX-B20C/B25C 8.2. Soft switch function description SW-A2 No. 5 Sender’s information transmit (SENDER’S INFORMATION TRANSMISSION) is a switch to set the SW-A1 No. 1 Protect from echo function to print the content of HEADER PRINT described in the pass- Used to protect from echo in reception. code list at the front end of receiver’s original when original is sent to the remote machine.
Page 31 SW-A6 No. 7 Initial compression scheme for sharp fax in TX mode When set to "0", if the other fax is Sharp model, fax transmit the docu- DIAL DATA ment by H2 mode. When set to "1", even if the other fax is Sharp...
Page 32 UX-B20U/UX-B20C/B25C SW-B4 No. 5 Dial pulse make/break ratio (%) SW-C1 No. 8 Reserved When using the 33% make ratio pulse dial, set to "0". Set to "0". When using the 40% make ratio pulse dial, set to "1". SW-D1 No. 1 ~ No. 4 Number of rings for auto receive SW-B4 No.
Page 33 UX-B20U/UX-B20C/B25C SW-D3 No. 1 ~ No. 5 CI off detection timer (0-1550ms setting by 50ms step) Set the minimum time period of CI signal interruption which affords to be judged as a CI OFF section with 50ms steps. (Example). 400msec 2000msec 01110 (50ms ~ 14): 700ms (CI interruption>700ms:Judged as a CI OFF section)
Page 34 UX-B20U/UX-B20C/B25C SW-F2 No. 1 CNG detection in STAND-BY mode SW-J2 No. 3 Reserved When setting to "1", the CNG signal detection function during stand-by Set to "0". stops. SW-J2 No. 4, No. 5 Handset receiver volume SW-F2 No. 2, No. 3 Reserved Used to adjust sound volume from a handset receiver volume.
Page 35 UX-B20U/UX-B20C/B25C SW-O1 No. 1 ~ No. 8 Reserved Set to "0". SW-O2 No. 1 ~ No. 8 Reserved Set to "0". SW-O3 No. 1 ~ No. 8 Reserved Set to "0". SW-O4 No. 1 ~ No. 8 Reserved Set to "0". SW-O5 No.
Page 36: Troubleshooting
UX-B20U/UX-B20C/B25C [3] Troubleshooting • Apply line equalization SOFT SWITCH A2-1, 2, 3, 4. May be used in case [1] [2] [3] [4]. Refer to the following actions to troubleshoot any of the problems • Slow down the transmission speed SOFT SWITCH A2-1, 2, 3, 4. mentioned in 1-4.
Page 37: Error Code Table
UX-B20U/UX-B20C/B25C [4] Error code table 1. Communication error code table 1.1. G3 Transmission Code Final received signal Error Condition (Receiver side) Incomplete signal frame Cannot recognize bit stream after flag NSF, DIS Cannot recognize DCS signal by echo etc. Cannot recognize NSS signal (FIF code etc.) Disconnects line during reception (carrier missing etc.) Disconnects line by fall back Disconnects line during reception of multi page...
Page 38: General Description
UX-B20U/UX-B20C/B25C UX-B20U/UX-B20C/B25C Service Manual Service Manual Market CHAPTER 3. MECHANISM BLOCKS 3.2. Automatic document feed 1) Use of the paper feed roller and separate plate ensures error-free transport and separation of documents. The paper feed plate [1] General description spring presses the document to the paper feed roller to assure smooth feeding of the document.
Page 39 UX-B20U/UX-B20C/B25C 4. Document release Back of document 4.1. General Last page of document Paper feed plate To correct a jammed document or to clean the document running sur- Separate rubber face, pull the insertion side of document center of the operation panel. Separate plate To open the upper document guide, the operation panel must be Sub feed plate...
Page 40: Ink Jet Printer
IC, located on the Ink PWB, also connected back to the ASIC, on Con- trol PWB. Approx.yield 300 letter pages at 4%coverage Replacement cartridge:SHARP UX-C70B 4.7. Ink cartridge carrier Approx.yield 600 letter pages at 4%coverage The carriage connects via a FPC on the Ink PWB. The ink cartridge * When Ink Save mode is enabled.
Page 41 UX-B20U/UX-B20C/B25C 5. Overall troubleshooting of Printer • BOTH CARRIER MOTOR AND FEED MOTOR ARE NG. REPLACE FU101 FUSE "FU101" OPEN CHECK RESISTANCE CHECK +30V PATTERN +30V CNHEAD1(8PIN) BETWEEN +30V AND GND. SHORT OR NOT SHORT REPLACE CONTROL PWB CHECK IC10 REPLACE IC10 REPLACE CONTROL PWB •...
Page 42 UX-B20U/UX-B20C/B25C • MISSING NOZZLES (RESULT OF CHECK PATTERN OR CLEAN NOZZLES) CLEAN NOZZLES REPLACE ANOTHER CARTRIDGE CHECK IC AND CONNECTOR MISSING MANY NOZZLES CHECK THE SOLDER CORRECT SOLDER CNHEAD1,2 (CONTROL PWB) CHECK RESISTANCE BETWEEN CHECK +11.82V (CNHEAD1-5,6PIN) +11.82V AND GND, SHORT OR NOT. SHORT CHECK +11.82V PATTERN REPLACE CONTROL PWB...
Page 43: Disassembly And Assembly Procedures
UX-B20U/UX-B20C/B25C [3] Disassembly and assembly procedures • This chapter mainly describes the disassembly procedures. For the assembly procedures, reverse the disassembly procedures. • Easy and simple disassembly/assembly procedures of some parts and units are omitted. For disassembly and assembly of such parts and units, refer to the Parts List.
Page 44 UX-B20U/UX-B20C/B25C Main frame unit/Operation panel unit/ Parts list (Fig. 2) Speaker Part name Part name Mechanism unit Speaker spring Connector Speaker NOTE: For disassembly of the inside of the unit, Screw (3x10) Screw (3x10) refer to the exploded view in the parts Screw (3x10) Operation panel unit guide.
Page 45 UX-B20U/UX-B20C/B25C PWB's Parts list (Fig. 3) Part name Part name NOTE: For disassembly of the inside of the unit, Mechanism unit Power supply PWB unit Screw (3x10) Screw (3x6) refer to the exploded view in the parts Screw (3x6) Sheet guide.
Page 46 UX-B20U/UX-B20C/B25C Wire treatment Parts list (Fig. 4) Part name Band (100mm) Wire holder Screw (4x6) Screw (3x6) Core (F2147) Core (F0049) Feed motor cable FPC flat cable Carrier motor cable Filament tape Panel cable Speaker cable Feed motor cable CIS cable CIS cable Speaker cable Control PWB...
Page 47: Block Diagram
UX-B20U/UX-B20C/B25C UX-B20U/UX-B20C/B25C Service Manual Service Manual Market CHAPTER 4. DIAGRAMS [1] Block diagram 4 – 1...
Page 48: Wiring Diagram
UX-B20U/UX-B20C/B25C [2] Wiring diagram 4 – 2...
Page 49: Point-To-Point Diagram
UX-B20U/UX-B20C/B25C [3] Point-to-point diagram LIU PWB UNIT CONTROL CNCIS CNLIU CNLIU +24V +24V UNIT CISVDD CISVDD øT øT CISCLK CISCLK RHS- RHS- GLED GLED TELIN TELIN +24V +24V TELMUTE TELMUTE RXIN RXIN TXOUT TXOUT SPEAKER CNSP SPD- SPD- MICMUTE MICMUTE DOWNLOAD cable CNPRG INK PWB UNIT...
Page 50: Circuit Description
UX-B20U/UX-B20C/B25C UX-B20U/UX-B20C/B25C Service Manual Service Manual Market CHAPTER 5. CIRCUIT DESCRIPTION [1] Circuit description 3. Operational description Operational descriptions are given below: 1. General description • Transmission operation The compact design of the control PWB is obtained by using CONEX- When a document is loaded in stand-by mode, the state of the doc- ANT fax engine in the main control section and high density printing of ument sensor is sensed via the 1 chip fax engine (SCE209L).
Page 51: Circuit Description Of Control Pwb
UX-B20U/UX-B20C/B25C [2] Circuit description of control PWB 2.2.2 DRAM Controller The CX06835 includes a DRAM controller with signal and page mode 1. General description access support which supports fast, normal, or slow refresh time. DRAM memory space is provided in one block up to 4 MB. A maxi- Fig.
Page 52 UX-B20U/UX-B20C/B25C 2.2.10 Scanner and Video Control 2.2.17 Watchdog Timer Five programmable control and timing signals support common CCD The Programmable Watchdog Timer is intended to guard against firm- and CIS scanners. The video control function provides signals for con- ware lockup on the part of either executive-controlled background trolling the scanner and for processing its video output.
Page 53 UX-B20U/UX-B20C/B25C SCE209L (IC5) Terminal descriptions Input Output Pin List Pin Description Type Type VDDPLL — — — PLL Power VSSPLL — — — PLL GND ROMCSn — — 13Xs — SYNC/GPO[20] — 13Xs — — 13Xs — — 13Xs — DEBUGn —...
Page 54 UX-B20U/UX-B20C/B25C SCE209L (IC5) Terminal descriptions Input Output Pin List Pin Description Type Type PCLK/DMAACK — — — — — Digital Power GPIO[11]/BE/SERINP/SR4IN 13Xs — GPIO[19]/RDY/SEROUT 13Xs — START — — CLK1n/GPO[25] — 13Xs — CLK2/GPO[24] — 13Xs — — — —...
Page 55 UX-B20U/UX-B20C/B25C SCE209L (IC5) Terminal descriptions Input Output Pin List Pin Description Type Type A[10] 13Xs CPU Address Bus A[11] 13Xs CPU Address Bus A[12] 13Xs CPU Address Bus A[13] 13Xs CPU Address Bus A[14] 13Xs CPU Address Bus A[15] 13Xs CPU Address Bus A[16] 13Xs...
Page 56 UX-B20U/UX-B20C/B25C 2.3. Panel control block The following controls are performed by the SCE209L. • Operation panel key scanning • Operation panel LCD display 2.4. Mechanism/recording control block • Recording control block diagram TEST[1:0] OPO[4:0]* BATRSTN OPERATOR OPI[3:0]* RESETN PANEL, KEYPAD, TONE LCDCS* ALTTONE...
Page 57 UX-B20U/UX-B20C/B25C 2.5. Modem block (CX06835) 2.5.1 Integrated Analog Control Resisters for CX06835 The CX06835 IA can be used as a Primary Integrated Analog (PIA) codec or as a Secondary Integrated Analog (SIA) codec, depending on the signal connection with the SCE Controller ASIC device. In the SCE100 product, both the PIA and the SIA are packaged external to the SCE Controller device, whereas in the SCE209, the PIA is packaged with the SCE209 Controller and the SIA is external.
Page 58 This circuit reads data from the input buffer and enlarges or reduces after the sensor is switched, which has made it possible to identify its image data dot by dot. Based on SHARP’s conversion algorithm (over- position at the time of initialization.
Page 59 UX-B20U/UX-B20C/B25C 2.6.11 Fax Engine Bus Interface 2.6.14 SDRAM Controller This interface has a bridging function for connecting the external bus This controller accesses the memory by controlling the read cycle, of Fax Engine LSI and the internal bus of ASIC. Due to the system write cycle, and AUTO refresh cycle of a 16-bit wide 16Mbit Synchro- clock condition, 1WAIT or more must be set to activate Fax Engine.
Page 60 UX-B20U/UX-B20C/B25C µPD65945 (IC4) Pin descriptions SYMBOL PIN NO. DESCRIPTION PAD CELL. NOTE System Operation Signals (3 pin) X’tal in OSI1 32.256 MHz XOUT X’tal out OSO1 ASICRES Reset FIS1 Schmitt L: Operate H: Reset SYMBOL PIN NO. DESCRIPTION PAD CELL. NOTE Fax Engine Bus Interface (21 pin) SYSCLK...
Page 61 UX-B20U/UX-B20C/B25C µPD65945 (IC4) Pin descriptions SYMBOL PIN NO. DESCRIPTION PAD CELL. NOTE Sensor Signals (2 pin) Home position Sensor Input FIS1 Schmitt L: No Position H: Home Position PIN_N Paper-in Sensor Input FIS1 Schmitt L: Paper Exist H: No Paper SYMBOL PIN NO.
Page 62 UX-B20U/UX-B20C/B25C µPD65945 (IC4) Pin descriptions SYMBOL PIN NO. DESCRIPTION PAD CELL. NOTE SDRAM Bus Interface (33 pin) Address bus FO09 L: Logic-0 FO09 H: Logic-1 FO09 FO09 FO09 FO09 FO09 FO09 FO09 FO09 RA10 FO09 Black select FO09 L: Bank-0 H: Bank-1 Data bus B00U...
Page 63 UX-B20U/UX-B20C/B25C 2.7. IC10 (PLCC44) Hardware description PLCC44 (IC10) Pin descriptions This specfication describes a multifunction analog ASIC to be used in PIN NAME PIN DESCRPTION inkjet printer applications. This ASIC integrates two Switching Voltage Regulator circuits, two motor drive circuits and a Reset circuit in a sin- (Capacitor VBULK) gle IC.
Page 64: Circuit Description Of Liu Pwb
UX-B20U/UX-B20C/B25C [3] Circuit description of LIU PWB 1. LIU block operational description 1.1. Block diagram LIU PWB CONTROL PWB (20438 I/A) IC4 UPD65945 RTLoop ASIC IC101A OP AMP OP AMP SPKRP SIGTX LINE SPKRN TXOUT SP Out Enable Mic Enable IC101B OP AMP OP AMP...
Page 65 UX-B20U/UX-B20C/B25C 6. Signal/DTMF transmission level & receiving level • Signal transmission level setting: ATT -8 dB Circuit output: -11.5 dBm. • DTMF transmission level setting: HF -2.5 dBm SLF -4.0 dBm Thus, set the level. 7. Power supply and bias circuit •...
Page 66: Circuit Description Of Power Supply Pwb
UX-B20U/UX-B20C/B25C [4] Circuit description of power supply PWB 1. Block diagram This power supply unit has the function to convert the AC 120 V (60 Hz) to DC 5 V, and provide these outputs to the equipment. The following explains the function of each block. TRANSFORMER +30V CIRCUIT +30V...
Page 67: Control Pwb Circuit
UX-B20U/UX-B20C/B25C UX-B20U/UX-B20C/B25C Service Manual Service Manual Market CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT [1] Control PWB circuit 1. Main Control Block (1/8) 6 – 1...
Page 68 UX-B20U/UX-B20C/B25C 2. Memory Block (2/8) 6 – 2...
Page 69 UX-B20U/UX-B20C/B25C 3. FAX Modem Block (3/8) 6 – 3...
Page 70 UX-B20U/UX-B20C/B25C 4. ASIC Block (4/8) 6 – 4...
Page 71 UX-B20U/UX-B20C/B25C 5. Thunderbolt Block (5/8) 6 – 5...
Page 72 UX-B20U/UX-B20C/B25C 6. Video/Sensor/Power Supply Block (6/8) 6 – 6...
Page 73 UX-B20U/UX-B20C/B25C 7. Analog Signal Block (7/8) 6 – 7...
Page 74 UX-B20U/UX-B20C/B25C 8. Connector Block (8/8) 6 – 8...
Page 75 UX-B20U/UX-B20C/B25C 9. Control PWB parts layout (Top side) The CONTROL PWB of the model employs lead-free solder. 6 – 9...
Page 76 UX-B20U/UX-B20C/B25C 10. Control PWB parts layout (Bottom side) The CONTROL PWB of the model employs lead-free solder. 6 – 10...
Page 77: Liu Pwb Circuit
UX-B20U/UX-B20C/B25C [2] LIU PWB circuit 1. LIU PWB Circuit (1/3) 6 – 11...
Page 78 UX-B20U/UX-B20C/B25C 2. LIU PWB Circuit (2/3) 6 – 12...
Page 79 UX-B20U/UX-B20C/B25C 3. LIU PWB Circuit (3/3) 6 – 13...
Page 80 UX-B20U/UX-B20C/B25C 4. LIU PWB parts layout (Top side) The TEL/LIU PWB of the model employs lead-free solder. 6 – 14...
Page 81 UX-B20U/UX-B20C/B25C 5. LIU PWB parts layout (Bottom side) The TEL/LIU PWB of the model employs lead-free solder. 6 – 15...
Page 82: Power Supply Pwb Circuit
UX-B20U/UX-B20C/B25C [3] Power Supply PWB circuit 1. Power Supply PWB circuit 6 – 16...
Page 83 UX-B20U/UX-B20C/B25C 2. Power Supply PWB parts layout (Top side) P101 CNPW C104 IC101 AC250V 2.5A VR101 R107 C101 C111 D101 BEA1 C102 CNAC NTC1 D106 The POWER PWB of the model employs lead-free solder. 3. Power Supply PWB parts layout (Bottom side) The POWER PWB of the model employs lead-free...
Page 84: Operation Panel Pwb Circuit
UX-B20U/UX-B20C/B25C [4] Operation Panel PWB circuit 1. Operation Panel PWB circuit 6 – 18...
Page 85 UX-B20U/UX-B20C/B25C 2. Operation Panel PWB parts layout (Top side) The OPERATION PANEL PWB of the model employs lead-free solder. Note: Since the parts of PWB cannot be supplied, change it as a unit. 6 – 19...
Page 86 UX-B20U/UX-B20C/B25C 3. Operation Panel PWB parts layout (Bottom side) The OPERATION PANEL PWB of the model employs lead-free solder. Note: Since the parts of PWB cannot be supplied, change it as a unit. 6 – 20...
Page 87: Ink Pwb Circuit
UX-B20U/UX-B20C/B25C [5] Ink PWB circuit 1. Ink PWB Circuit 6 – 21...
Page 88 UX-B20U/UX-B20C/B25C 2. Ink PWB parts layout (Top side) 3. Ink PWB parts layout (Bottom side) 6 – 22...
Page 89: Chapter 7. Operation Flowchart
UX-B20U/UX-B20C/B25C UX-B20U/UX-B20C/B25C Service Manual Service Manual Market CHAPTER 7. OPERATION FLOWCHART [1] Protocol Receive side Transmitter side G3 communication (Document inserted into document sensor during standby) To recording position Document inserted to the reading position (DCS) (DCS) 1st page Next page insert command Cut line printed Cut line printed...
Page 90: Power On Sequence
UX-B20U/UX-B20C/B25C [2] Power on sequence START CPU initialized MODEM initialized "WAIT A MOMENT" display STOP key ? "MEMORY CLEAR ?" display 3 sec ? STAND-BY START key ? COPY key ? STOP key ? "MEMORY CLEARED" display "MEMORY CLEARED" display 3 sec ? Memory clear Memory clear...
Page 91: Chapter 8. Other
UX-B20U/UX-B20C/B25C UX-B20U/UX-B20C/B25C Service Manual Service Manual Market CHAPTER 8. OTHER [1] Service tools 1. List PRICE PARTS CODE DESCRIPTION RANK CPWBX3439SC01 Extension board unit PSHEZ3579SCZZ Shading wave memory standard paper LBNDJ2006XHZZ Band(100mm) QCNWG223CSCZZ CIS EXTENSION CABLE (7PIN) [CNCIS/CNCIS-2] QCNWG224CSCZZ PANEL EXTENSION CABLE (16PIN) [CNPN/CNPN-2] QCNWG225CSCZZ SPEAKER EXTENSION CABLE (2PIN) [CNSP/CNSP-2] QCNWG232CSCZZ...
Page 92 UX-B20U/UX-B20C/B25C 2. Relay board unit 2.1. Relay board unit 1. Remove the LIU, Control PWB and Power Supply PWB from this unit, and mount the board unit instead. Before connecting the wiring to the relay board unit, set the test PWB switches to the fixed position.
Page 93 UX-B20U/UX-B20C/B25C 3. Shading paper • The white and black basis is applied to remember the shading waveform. Be sure to perform this operation when replacing the battery or replacing the control PWB. Execute in the shading mode of DIAG mode. SHADING WAVE MEMORY STANDARD PAPER (PSHEZ3579SCZZ) 8 –...
Page 94: Changing The Record Paper Size
UX-B20U/UX-B20C/B25C [2] Changing the record paper size 1. How to change the A4 size and letter size of the record papers 1) It becomes the record paper of the A4 size by installing A4 paper guide (PGiDM2673XHZZ) which shows in the drawing. Remove A4 paper guide when you use the record paper of the letter size.
Page 95: Rewriting Version Up The Flash Rom
UX-B20U/UX-B20C/B25C [3] Rewriting version up the FLASH ROM 1. Step 1 File setting (1) Execute “FAX_LOADER.EXE” and extract the compressed file. File contents: 2. Step 2 File setting (2) Copy the downloaded file ( .VER) to ¥FAX_LOADER¥DATA¥FAX¥ in the default directory (given directory). 3.
Page 96 UX-B20U/UX-B20C/B25C FRONT PANEL BACK PANEL MAIN SW CALIBRATION BAT SW PARK SW RS-232C DSUB 9PN FUSE MODE CALIBRATION Voltage Cordless MAIN CALIBRATION DOWNLOAD DOWNLOAD 3.3V CORD Fig. 2. Program loader BOX (1) Before connecting the PC (2) After connecting the PC (3) Power supply to the FAX (4) Connect Program loader and Program loader BOX...
Page 97 UX-B20U/UX-B20C/B25C 4. Using software for the PC (Tera Term) Uncompress the compressed file of Tera Term. Execute the “SETUP.EXE” from compressed files to install Tera Term. Execute the “ttermpro.exe” to start Tera Term. 1. Select “New connection” from the pull-down menu of “File”. 1) Check “Serial”.
Page 98 UX-B20U/UX-B20C/B25C 2. Select “Serial port” from the pull-down menu of “Setup”. Select the port number which the RS-232C cable is connected to. Set the other parameters as follows and click “OK” for confirmation. ↓ Proceed to 3. 8 – 8...
Page 99 UX-B20U/UX-B20C/B25C 3. Perform procedures described in Table 3. (1) Before connecting the PC (2) After connecting the PC (3) Power supply to the FAX (4) Connect Program loader and Program loader BOX and Program loader BOX machine. BOX and the with RS-232C cable.
Page 100 UX-B20U/UX-B20C/B25C 4. Select “Send file” from the pull-down menu of “File”. Enable the Binary in “Option” and open “Atl0. cmd”. ↓ Proceed to 5. 8 – 10...
Page 101 UX-B20U/UX-B20C/B25C If the description above does not appear, return to 4. If the description above appears, proceed to 6. 8 – 11...
Page 102 UX-B20U/UX-B20C/B25C 6. Select “Send file” from the pull-down menu of “File”. Enable the Binary in “Option” and open “ta.ver”. (Select a file you want to download here.) ↓ Proceed to 7. 8 – 12...
Page 103 UX-B20U/UX-B20C/B25C If the description above appears, return to 4. If the description above appears, downloading was completed normally. ↓ Proceed to 8. 8 – 13...
Page 104 UX-B20U/UX-B20C/B25C 1. To go on to download FLASH ROM, perform the following procedures. 1-1. Only perform procedures (1) and (2) described in Table 4. 1-2. Return to 3. 2. To complete downloading FLASH ROM, perform the following procedures. 2-1. Perform procedures (1) through (3) described in Table 4. 2-2.
Page 105: Parts Guide
UX-B20U/UX-B20C/B25C PARTS GUIDE UX-B20 UX-B25 MODEL MODEL SELECTION CODE DESTINATION UX-B20 U.S.A. UX-B20/B25 Canada CONTENTS [5] LIU PWB unit [1] Cabinet,etc. [6] Power supply PWB unit [2] Operation panel unit/Document guide upper [7] Operation panel PWB unit [3] Packing material & Accessories...
Page 106 UX-B20U/UX-B20C/B25C [1] Cabinet,etc. OPERATION PANEL UNIT/ DOCUMENT GUIDE UPPER EARTH CABLE EARTH CABLE...
Page 107 UX-B20U/UX-B20C/B25C PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [1] Cabinet,etc. LIU PWB unit DCEKL253DXH01 Ink PWB unit with FPC DCEKI256DXH01 Control PWB unit(Within ROM) [20U] DCEKC284TXHZZ Control PWB unit(Within ROM) [20C/25C] DCEKC386TXHZZ Top cabinet GCABA2440XHSA Download cover GCOVA2502XHSA Hook switch lever MLEVP2395XHSA Hook switch lever spring MSPRC3469XHZZ...
Page 108 UX-B20U/UX-B20C/B25C PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [1] Cabinet,etc. ASF gear,22/23Z NGERH2633XHZZ Insulation sheet PSHEZ3829XHZZ Exit roller ass'y CROLP2517XH01 Feed roller ass'y CROLR2516XH01 Roller bearing LBSHP2157XHZZ Frame chassis LCHSM2078XHZZ Main frame LFRM-2257XHZZ Idler Holder LHLDZ2291XHZZ Press roller holder LHLDZ2275XHZZ FFC clamper LHLDZ2288XHZZ...
Page 109 UX-B20U/UX-B20C/B25C [2] Operation panel unit/Document guide upper PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [2] Operation panel unit/Document guide upper Panel case GCASP2187XHSA 12 key JBTN-2463XHSA Start key JBTN-2464XHSA Stop key JBTN-2465XHSA Copy key JBTN-2466XHSA Function key JBTN-2467XHSA Cursol key JBTN-2468XHSA Ink set key JBTN-2469XHSA...
Page 110 UX-B20U/UX-B20C/B25C [3] Packing material & Accessories TAPE TAPE AC CORD TAPE TAPE TAPE TAPE PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [3] Packing material & Accessories CPAKC448FXH01 Packing case with label [20U] SPAKC482FXHTZ Packing case [20C] CPAKC202GXH01 Packing case with label [25C] LPLTP3318XHZZ Paper tray...
Page 111 UX-B20U/UX-B20C/B25C PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [4] Control PWB unit Battery(CR2032T23) [BAT1] UBATL2049SCZZ Capacitor(50WV 22µ F) [C3] VCEAGA1HW226M Capacitor(50WV 0.1µ F) [C4] VCKYCY1HF104Z Capacitor(10WV 1µ F) [C5] VCKYCY1AF105Z Capacitor(10WV 1µ F) [C6] VCKYCY1AF105Z Capacitor(10WV 1µ F) [C7] VCKYCY1AF105Z Capacitor(50WV 0.1µ...
Page 112 UX-B20U/UX-B20C/B25C PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [4] Control PWB unit Capacitor(50WV 0.1µ F) [C163] VCKYCY1HF104Z Capacitor(50WV 0.1µ F) [C164] VCKYCY1HF104Z Capacitor(50WV 1000PF) [C165] VCKYCY1HB102K Capacitor(50WV 0.1µ F) [C166] VCKYCY1HF104Z Capacitor(50WV 0.1µ F) [C167] VCKYCY1HF104Z Capacitor(50WV 0.1µ F) [C168] VCKYCY1HF104Z Capacitor(10WV 1µ...
Page 113 UX-B20U/UX-B20C/B25C PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [4] Control PWB unit Capacitor(50WV 100PF) [C288] VCCCCY1HH101J Resistor(1/16W 0Ω ± 5%) [C289] VRS-CY1JB000J Capacitor(10WV 1µ F) [C290] VCKYCY1AF105Z Resistor(1/16W 0Ω ± 5%) [C291] VRS-CY1JB000J Capacitor(50WV 220PF) [C292] VCCCCY1HH221J Resistor(1/16W 0Ω ± 5%) [C294] VRS-CY1JB000J Capacitor(50WV 0.1µ...
Page 114 UX-B20U/UX-B20C/B25C PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [4] Control PWB unit Resistor(2W 11Ω ± 5%) [R1] VRS-HT3DA110J Resistor(1/16W 100Ω ± 5%) [R2] VRS-CY1JB101J Resistor(1/16W 200Ω ± 5%) [R3] VRS-CY1JB201J Resistor(1W 0.91Ω ± 5%) [R7] VRS-HT3AAR91J Resistor(1W 0.91Ω ± 5%) [R8] VRS-HT3AAR91J Resistor(1W 0.91Ω...
Page 115 UX-B20U/UX-B20C/B25C PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [4] Control PWB unit Resistor(1/16W 33Ω ± 5%) [R200] VRS-CY1JB330J Resistor(1/16W 33Ω ± 5%) [R201] VRS-CY1JB330J Resistor(1/16W 33Ω ± 5%) [R202] VRS-CY1JB330J Resistor(1/16W 100Ω ± 5%) [R203] VRS-CY1JB101J Resistor(1/16W 100Ω ± 5%) [R204] VRS-CY1JB101J Resistor(1/16W 3.9KΩ...
Page 116 UX-B20U/UX-B20C/B25C PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [5] LIU PWB unit Capacitor(50WV 1000PF) [C115] VCKYCY1HB102K Capacitor(10WV 1µ F) [C116] VCKYCY1AF105Z Resistor(1/16W 0Ω ± 5%) [C122] VRS-CY1JB000J Capacitor(50WV 33PF) [C123] VCCCCY1HH330J Capacitor(50WV 1000PF) [C124] VCKYCY1HB102K Capacitor(50WV 220PF) [C125] VCCCCY1HH221J Capacitor(16WV 0.1µ...
Page 117 UX-B20U/UX-B20C/B25C PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [6] Power supply PWB unit Connector(8pin) [CNPW] 0KYK2148LS002 Diode(1SS133) [D3] 0KYD2051AQ002 Diode(1SS133) [D4] 0KYD2051AQ002 Zener diode(HZS9) [D5] 0KYD4066AQ060 Diode(1SS133) [D6] 0KYD2051AQ002 Zener diode(HZS30) [D8] 0KYD4066AQ105 Diode(ERA15-06) [D10] 0KYD1057AQ006 Diode(ERA15-06) [D11] 0KYD1057AQ006 Diode(ERA15-06) [D12] 0KYD1057AQ006...
Page 118 UX-B20U/UX-B20C/B25C PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [8] Ink PWB unit Resistor(1/16W 5.1KΩ ± 5%) [R108] VRS-CZ1JB512J Resistor(1/16W 120Ω ± 5%) [R109] VRS-CZ1JB121J C1 sheet [SHEET1] PSHEP3680XHZZ FPC tape [TAPE1] PTPEH2098XHZZ FFC tape 1 [TAPE2] PTPEH2086XHZZ FFC tape 1 [TAPE3] PTPEH2086XHZZ FPC tape 2...
Page 119 UX-B20U/UX-B20C/B25C INDEX INDEX PRICE PART PRICE PART PARTS CODE PARTS CODE RANK MARK RANK RANK MARK RANK [ C ] [ M ] CCNWN202CXH01 1-14 MARMP2036XHZZ 1-98 CMOTZ2192XH01 1-80 MARMP2037XHZZ 1-99 CPAKC202GXH01 MLEVP2377XHZZ 1-62 CPAKC448FXH01 MLEVP2395XHSA CPLTP3222XHR3 MLEVP2396XHZZ 1-100 CROLP2499XH01 1-32 MLEVP2397XHZZ 1-101...
Page 120 UX-B20U/UX-B20C/B25C PRICE PART PRICE PART PARTS CODE PARTS CODE RANK MARK RANK RANK MARK RANK PSHEZ3842XHZZ 1-30 RUNTZ2080XH02 2-13 PSPO-2022XHZZ 1-48 RUNTZ2145XHZZ 1-42 PSPO-2023XHZZ [ S ] PTPEH2086XHZZ 8-25 SPAKA446FXHZZ " 8-26 SPAKA447FXHZZ PTPEH2096XHZZ 8-27 SPAKA450FXHZZ PTPEH2098XHZZ 8-24 SPAKA451FXHZZ 3-10 PTPEH2114XHZZ 1-50 SPAKC482FXHTZ...
Page 121 UX-B20U/UX-B20C/B25C PRICE PART PRICE PART PARTS CODE PARTS CODE RANK MARK RANK RANK MARK RANK " 4-57 " " 4-59 " 4-23 " 4-60 " 4-34 " 4-61 " 4-36 " 4-62 " 4-37 " 4-63 " 4-38 " 4-65 "...
Page 122 UX-B20U/UX-B20C/B25C PRICE PART PRICE PART PARTS CODE PARTS CODE RANK MARK RANK RANK MARK RANK " " 5-25 " " 5-61 " " 5-67 " " 5-72 VCKYCY1HF473Z VRSCY1JB1000F 4-347 VCKYPA1HB103K VRS-CY1JB100J 4-324 VCKYTV1AF106Z 4-14 " 4-368 " 4-145 " 4-369 "...
Page 123 UX-B20U/UX-B20C/B25C PRICE PART PRICE PART PARTS CODE PARTS CODE RANK MARK RANK RANK MARK RANK " 4-342 0KYC1384QL472 " 4-370 " " 4-371 0KYC2131QS104 " 4-372 0KYC30A0BQ121 6-13 VRS-CY1JB332J 4-265 0KYC30A0BQ471 6-12 " 4-357 0KYC30A0EQ101 6-11 " 4-362 0KYC3126KS121 " 5-66 0KYD1057AQ006 6-22...
Page 124 © COPYRIGHT © XXXX BYSHARP CORPORATION COPYRIGHT 2004 BY SHARP CORPORATION ALL RIGHTS RESERVED. ALL RIGHTS RESERVED. No part of this publication may be reproduced, No part of this publication may be reproduced, stored in a retrieval system, or transmitted in...

This manual is also suitable for:

Ux-b25

Sharp UX-B20 Service Manual

Chapter 1. General Description

Chapter 2. Adjustments

Chapter 3. Mechanism Blocks

CHAPTER 4. DIAGRAMS 1] Block Diagram

Chapter 5. Circuit Description

Chapter 7. Operation Flowchart

Chapter 8. Other

Quick Links

Related Manuals for Sharp UX-B20

Summary of Contents for Sharp UX-B20

This manual is also suitable for:

Table of Contents