Sharp QD-101MM Service Manual
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Sharp QD-101MM Service Manual

Tft display unit
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1. INTRODUCTION .........................................................................1
2. SPECIFICATIONS .......................................................................2
3. ADJUSTMENT OF PWB .............................................................5
4. CIRCUIT DESCRIPTION.............................................................8
5. TROUBLESHOOTING CHART.................................................21
6. CIRCUIT DIAGRAM & PWB .....................................................38
7. REPLACEMENT PARTS LIST.................................................54
8. ASSEMBLY DRAWINGS .........................................................60
9. INFORMATION..........................................................................64
SERVICE MANUAL
TFT DISPLAY UNIT
MODEL
• In the interests of user-safety the set should be restored to it's
original condition and only parts identical to those specified be
used.
CONTENTS
SHARP CORPORATION
QD-101MM
QD-101MM
SZ545QD-101MM

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  • Page 1: Table Of Contents

    QD-101MM SERVICE MANUAL SZ545QD-101MM TFT DISPLAY UNIT QD-101MM MODEL • In the interests of user-safety the set should be restored to it's original condition and only parts identical to those specified be used. CONTENTS 1. INTRODUCTION .................1 2. SPECIFICATIONS ...............2 3.

  • Page 2: Introduction

    1. INTRODUCTION The QD-101MM is a liquid crystal display monitor. It employs a high contrast, high response, 10.4-inch TFT liquid crystal display panel,which can generate a maximum of 16,000,000 different colors. It offers a computer graphic screen which responds in real time.

  • Page 3: Specifications

    2. SPECIFICATIONS 1.SPECIFICATIONS OF MAIN BODY 1.Display unit :10.4-inch TFT color LCD (Amolphous silicone active matrix type : a Si TFT) 2.Display color :Approx.16,000,000 colors 3.Display area :211.2(W)X158.4(H)mm 4.Number of pixels :640X(RGB)X480 pixels (pixel = R+G+B dots) 5.Input video signal :TTL level R,G,B,r,g,b, Hsync, Vsync TTL level...
  • Page 4 2.SPECIFICATIONS OF INTERFACE 2.1.Computer signal input section Signal layout Pin No. Analog Signal Digital Signal Analog Red N.C. Analog Green Digital Green Analog Blue Digital Blue N.C. Digital Secondary Red(r) N.C. Digital Red Analog Red Return Digital Red Return(GND) Analog Green Return Digital Green Return(GND) Analog Blue Return Digital Blue Return(GND)
  • Page 5 3.SPECIFICATIONS OF ENVIRONMENT Basically, these environment specifications apply to the main body and its accessories. Item Specification Remark Type Single-phase 2-wire type, 1 ground line Frequency 50 / 60 Hz Special AC adaptor accessory is Power used. Input voltage AC 100~240V Output voltage DC 11.5 ~ 13.8V 0 ~ 35 °C...

  • Page 6: Adjustment Of Pwb

    3. ADJUSTMENT OF PWB The QD-101MM has a Main printed-wiring board (PWB) that needs to be adjusted. The following paragraphs describe how to adjust the Main PWB. Correct adjustments are essential for the unit to operate properly. After repair or maintenance, it is necessary to readjust them.
  • Page 7 7) Turn on the power. Observing the oscilloscope, adjust the TP305 level to be equal to TP300 level by turning VR302 with the flat-tipped screwdriver. 2.3.VCO adjustment 1) Connect the + lead of the DC voltmeter to TP207, and the - lead to TP10. 2) Input the video timing of Fig.
  • Page 8 Video Hsync 1H=800dot=31.777557µs (1/H=31.468881KHz) Video Vsync 1V=525H=16.683217ms (1/V=59.94Hz) Fig. 1-B IBM VGA 480-line Black-solid Video 0.7V 640dot Hsync 1H=800dot=31.777557µs (1/H=31.468881kHz) Video 0.7V 480H Vsync 1V=525H=16.683217ms (1/V=59.94Hz) Fig. 1-C IBM VGA 480-line...

  • Page 9: Circuit Description

    4. CIRCUIT DESCRIPTION 1. GENERAL Circuit will be described in reference to the QD-101MM block diagram in Fig. 2. Composite video signal which enters via pin jack connector is converted into the digital RGB in the composite video input circuit by the control signal from the I C bus controller.
  • Page 11 2.2.Computer analog signal input circuit IBM computer and APPLE computer output the following analog signals at the load of 75Ω. Table 2 Computer Analog Signal 0.7Vp-p 0.7Vp-p 0.7Vp-p 1.0Vp-p APPLE 0.7Vp-p (Synchronization signal 0.7Vp-p overlapped) The signals are converted into 8-bit digital signals by the A/D converter(IC315~317). The computer analog signals are given to Pin 21 of the A/D converter, are divided by 256 between the voltages given to Pin 18(VRT) and Pin 24(VRB), and are digitally converted.
  • Page 12 3.VIDEO INPUT CIRCUIT Fig. 4 shows the block diagram. Circuit diagram is shown in VIDEO CIRCUIT. This unit automatically switches the circuit corresponding to the composite video signals of NTSC, PAL and SECAM. The composite video signal and S-Video signal input to the decoder are first converted into the 8-bit digital Y,UV signal, and is output as the 8-bit digital RGB from the RGB converter(IC601).
  • Page 13 SMUTE MUTE SW VOLUME PHONE JACK STEREO INPUT AUDIO LEVEL CONTOROLLER CN502 IC500 TA8184F IC503 TDA1905 SPEAKER AMPLIFIER SP500 SPEAKER AMPLIFIER VR501 ADJUST Fig. 5 Audio Input Circuit Block Diagram 5. PLL CIRCUIT The dot clock (VCOIN) is generated by the PLL circuit shown in Fig.6. The dot clock is necessary to sample the video signal from the computer and change it into the suitable dot data.
  • Page 14 Fig.6 PLL Circuit 6. MEMORY CIRCUIT BLOCK DIAGRAM is shown in Fig.2. 6.1.Field memory writing When data sent from the signal selector is written into the field memory(IC103~105), FWCK (clock slightly later than CLK) generated from the memory controller in IC100 is used. 6.2.Field memory reading The clock (FRCK) and control signals which are generated in the field memory reading signal generating circuit in IC100 are used to read data from the field memory.
  • Page 15 7.2.EEPROM control function The EEPROM(IC413, 414) area is provided to write the timing set values of each computer when it is connected to QD-101MM. The timing set values are written into EEPROM under the following four conditions. 1. All resetting 2.
  • Page 16 HYS1 (15mV) (4.5V) RESET signal Fig.8 HYS2 (200mV) (4.15V) POWER OFF DETECTION signal Fig.9 When the power is turned on, V and V rise. If V exceeds V , the RESET HYS1 signal is shifted to “High” level at the timing shown in Fig. 10. The reset operation of IC400 is canceled and executes the program.
  • Page 17 CPU) POWER OFF DETECTION signal RESET Fig.10 5.0V (4.5V) 4.0V POWER OFF DETECTION signal RESET Fig.11...
  • Page 18 8. LCD CONTROL CIRCUIT LCD control signal is slower than the video signal of the computer. While the video signal is serial data, the LCD display data is given as 4-bit parallel data for each RGB. In order to display the bit signal of the computer in LCD, it is necessary to store the data of one screen in the memory and read out the image data of one screen at the drive timing of LCD.
  • Page 19 9.2.Sequence circuit of LCD panel In QD-101MM, it is necessary to conform the power ON/OFF sequence of the LCD panel as shown Fig.12. Signal 0 T1 0 T2 Fig. 12 Power ON/OFF sequence Fig. 13 shows the panel sequence generation circuit.
  • Page 20 10.1. +5V power (V IC1 in Fig. 14 is a controller for a fixed frequency pulse width modulation(PWM) switching regulator and has two constant voltage controllers. One controller is used to generate a 5V power supply(V ) from the input power supply VIN(12VDC). The other one is for V IC1 has a saw-tooth wave oscillator built in whose oscillating frequency is determined by capacitor C30 connected to pin 1 and resister R29 connected to pin2.
  • Page 21 10.2. +10V power Fig. 15 shows the +10V power supply. +10V is generated from the input power supply of 12V by the 3-terminal regulator of IC7. Fig.15 +10V Power Circuit 11. INVERTER CIRCUIT The Inverter circuit board supplies the high voltage AC to the cold-cathode fluorescent tube used as backlight illumination for the TFT panel.

  • Page 22: Troubleshooting Chart

    5. TROUBLESHOOTING CHART START POWER ON Is the LED illuminated? Is the backlight Is CN20 12V? illuminated? Push the RESET button. Is the voltage at the both side of fuse on the Inverter circuit board 12V? Inverter circuit board Backlight failure. failure.
  • Page 23 Power Source Circuit Check POWER OFF Is the voltage between 1-pin and 2-pin of J1 approx.12V? AC adaptor failure. (2-pin is GND) POWER ON Is D2 cathode F1 failure. approx.12V? Is TP203(V CPU ) Is D7 anode D7 failure. approx.5.5V? approx.5.15V? Is TP202(V CC ) D8,D9,D10 failure.
  • Page 24 Digital Signal Display Check Input a digital video signal. (CGA 14.318MHz) Check IC206-6. Is clock pulse inputted approx.14.318MHz to IC100-pin116 (VCOIN)? Is proper video signal at IC100? Are J2-pin 9(MAC) and 10(A/D) at a high level? Disconnect the signal cable from J2.
  • Page 25 Is IC100-pin119(PVOL) at a high level? Is IC100-pin 120(PVOH) at a low level? IC100 failure. Is Q101-collector at a low level? Is Q102-collector at a high level? Q101 or Q102 failure. Is TP207 approx.2.5V? Can TP207 be adjusted to approx.2.5V with L200 (LOW BAND)? Adjust TP207 to approx.2.5V Low band VCO circuit...
  • Page 26 Analog Video Signal Display Check Input an analog video signal. (VGA,25.175MHz) Check IC206-pin6. Is clock pulse(25.175MHz) inputted to IC100-pin 116 (VCOIN)?. Disconnect the signal cable from J2. Are proper video signals at a signal cable-pin1,2,3 (A-R,G,B)? Is the signal cable- pin9(MAC) open? Is the signal cable-pin10 (A/D) GND level?
  • Page 27 Is TP300(VRT) approx.2.8V? Is TP301(VRB) approx.1V? Maximize the CONTRAST. Is TP300 approx.4.8V? Is TP301 approx.1V? Failure of threshold level setting circuit. Push RESET switch to set the CONTRAST to center. Are amplified video signals generated from TP303,304, and 305? (IC300,301,302 output)? Adjust again or failure of IC300,301,302 or their...
  • Page 28 Is IC100-pin119(PVOL) at a low level? Is IC100-pin120(PVOH) at a high level? IC100 failure. Is TP207 approx.4.1V? Can TP207 be adjusted to approx.4.1V with L201 (High Band)? High band VCO circuit failure. Adjust TP207 to approx.4.1V with L201.
  • Page 29 Composite Sync. Signal Display Check. Input a composite sync. signal. (MAC II type: 30.24MHz) Check IC206-pin6. Is clock pulse of approx.30.24MHz inputted to IC100-pin116 (VCOIN)? Is Hsync inputted to IC100- pin109? Is Vsync inputted to IC100- pin110? Is IC100-pin108 at a low level? Failure of signal cable or input circuit.
  • Page 30 MPU Circuit Check Press the RESET switch. Is clock pulse of 7.987MHz oscillating circuit approx.7.987MHz at failure. IC400-pin2? Does IC400-pin7 changed the level Failure of reset circuit or its from "L" to "H" after power is turned peripheral circuits. IC400 failure. Failure of power off detection Is IC400-pin5 and pin64 always circuit or its peripheral circuits.
  • Page 31 LCD Display Circuit Check Input a digital video signal. (CGA type; 14.318MHz) Is clock pulse of approx.25.00MHz at OSC1 failure. IC100-pin19? Is clock pulse of approx.14.318MHz at IC206- pin6(VCOIN)? Is Hsync inputted to IC100- pin109? Is Vsync inputted to IC100- pin110? Failure of Hsync/ Vsync input circuit or signal cable...
  • Page 32 Are signals at IC100- pin82(LHsync), 83(LVsync),and 79(LCDCK) normal? Disconnect the panel. Are signals at IC100- pin82,83,and 79 normal? Panel failure. IC100 failure. Are digital video signals inputted to IC100- pin5,6,95~98(B),3,4,90~93(G),and 1,2,85~88(R)? Video signal input circuit failure. Failure of IC100(Gate Array), 400(MPU),103~105(Field Memory).
  • Page 33 Is output level from IC100- pin140(RESET) high? Are proper signals at IC100- pin132~139(KA0~7), 147~154(KD0~7)? Failure of signal line between IC100 and IC400. Is IC100-pin119(PVOL) at a high level? Is IC100-pin120(PVOH) at a low level? IC100 failure. Is Q102-collector at a low level? Is Q101-collector at a high level?
  • Page 34 Video Circuit Check Input NTSC video signal to CN600. Are video signals inputted Input cable failure. to IC600-pin21? Input connector failure. Is a video signal outputted Check IC107 and 400. from TP600? Are Hsync or Vsync outputted from IC600- IC600 failure. pin38 and pin41? Are digital video signals outputted from IC601-...
  • Page 35 Audio Circuit Check Input a 500mV(RMS) sine-wave to audio input terminal. Set the volume to maximize and mute off. Is the signal outputted from IC500 failure IC500-pin7? Are the signals outputted from IC507- pin2 and IC508-pin2? IC507,508 failure. Does the signals change 0V when mute off? Is the signal inputted to IC503 failure.
  • Page 36 1 IC400-2 1V/div 50ns/div GND/ Fig.16 ...2V/div IC400-7...2V/div 5ms/div GND/ IC400-7 GND/ Fig.17 3 Vcc...2V/div IC400-5,64 2V/div 10ms/div GND/ IC400-5,64 GND/ Fig.18 4 IC400-15...1V/div 50ns/div GND/ Fig.19...
  • Page 37 5 IC100-19 1V/div 10ns/div Fig.20 6 IC100-110...2V/div 500ns/div GND/ Fig.21 7 IC100-110...2V/div IC206-6...2V/div 50ns/div IC100-110 GND/ IC206-6 GND/ Fig.22 8 IC100-109...2V/div IC206-6...2V/div 20ns/div IC100-109 GND/ IC206-6 GND/ Fig.23...
  • Page 38 9 IC100-79 1V/div IC100-79(LCDCK) 5ns/div GND/ Fig.24 10 IC100-82 1V/div 2.5µs/div IC100-82(LHsync) GND/ Fig.25 11 IC100-83 1V/div IC100-83(LVsync) 2.5ms/div GND/ Fig.26...

  • Page 39: Circuit Diagram & Pwb

    6. CIRCUIT DIAGRAM & PWB Fig.27 CIRCUIT DIAGRAM(MAIN CIRCUIT No.1)
  • Page 40 Fig.27 CIRCUIT DIAGRAM(MAIN CIRCUIT No.1)
  • Page 41 Fig.28 CIRCUIT DIAGRAM(MAIN CIRCUIT No.2)
  • Page 42 Fig.28 CIRCUIT DIAGRAM(MAIN CIRCUIT No.2)
  • Page 43 Fig.29 CIRCUIT DIAGRAM(MAIN CIRCUIT No.3)
  • Page 44 Fig.29 CIRCUIT DIAGRAM(MAIN CIRCUIT No.3)
  • Page 45 Fig.30 CIRCUIT DIAGRAM(MAIN CIRCUIT No.4)
  • Page 46 Fig.30 CIRCUIT DIAGRAM(MAIN CIRCUIT No.4)
  • Page 47 Fig.31 CIRCUIT DIAGRAM(POWER CIRCUIT)
  • Page 48 Fig.31 CIRCUIT DIAGRAM(POWER CIRCUIT)
  • Page 49 Fig.32 CIRCUIT DIAGRAM(VIDEO CIRCUIT)
  • Page 50 Fig.32 CIRCUIT DIAGRAM(VIDEO CIRCUIT)
  • Page 51 Fig.33 CIRCUIT DIAGRAM(AUDIO CIRCUIT)
  • Page 52 Fig.33 CIRCUIT DIAGRAM(AUDIO CIRCUIT)
  • Page 53 (FRONT-SIDE) Fig.34 PWB PATTERN(MAIN PWB)
  • Page 54 (REAR-SIDE) Fig.34 PWB PATTERN(MAIN PWB)

  • Page 55: Replacement Parts List

    7. REPLACEMENT PARTS LIST "HOW TO ORDER REPLACEMENT PARTS" To have your order filled promptly and correctly, please furnish the following information. 1.MODEL NUMBER 2.REF.NO. 3.PART NO. 4.DESCRIPTION REF.No. PART CODE DESCRIPTION QTY PRICE 1. MAIN PWB ASSEMBLY(DPWB-2146YAZZ) 1-1. IC RH-IX1234PAZZ uPC1100GS(T) IC4,407...
  • Page 56 REF.No. PART CODE DESCRIPTION QTY PRICE 1-3. TRANSISTER Q8,11 VS2SA1182-Y-1 2SA1182-Y Q9,10 VS2SA1293Y/1E 2SA1293Y Q101,102,500 VS2SC3913//-1 2SC3913-TB Q200 VSHN1C01FY/-1 HN1C01F-Y(T) Q201,702 VS2SA1162SY-1 2SA1162-SY Q202,203 VSFP1A3M///-1 FP1A3M(T) Q204 VS2SA1204RY-1 2SA1204RY Q205 VS2SC2884PY-1 2SC2884PY Q701 VSDTC-144WK-1 DTC144WK Q800,801 VS2SC2712LY-1 2SC2712 LY 1-4. COIL L7,10,13 RCILZ3877PAZZ RCR-875D 22MH...
  • Page 57 REF.No. PART CODE DESCRIPTION QTY PRICE 1-12. JUMPER, JACK, CONNECTOR JAG1.JDG1 QJUM-3001CEFW 5M/M-JUMPER QSOCZ0115PAZZ DC JACK QPLGJ2731YAZZ D-SUB 15P CN20 QPLGJ2755YAZZ DF13-5P-1.25DSA CN100 QCNCW0034KAZZ IL-FPR-33S-VF CN201 QCNCW0050PAZZ DF3A-2P-2DSA CN400 QPLGJ2702YAZZ 53047-1110 CN401,501 QPLGZ0370PAZZ B2B-PH-K-S CN402 QPLGJ2701YAZZ DF13-6P-1.25DSA CN403 QPLGJ2754YAZZ 53048-1110 CN502 QSOCZ2042YAZZ JPJ1125-01-030...
  • Page 58 REF.No. PART CODE DESCRIPTION QTY PRICE R208 VRN-CY1JS680D (CY)1/16W-68D R211,218,224,225,FB2 RCORF2028YAZZ BLM32A06 01,203 R214,251,426-429,602 VRS-CY1JD472J (CY)1/16W-4.7KJ R215,403 VRS-CY1JD681J (CY)1/16W-680J R216,217 VRS-CY1JD222J (CY)1/16W-2.2KJ R220 VRN-CY1JQ181D (CY)1/16W-180D R221 VRN-CY1JR334D (CY)1/16W-330KD R222,223 VRS-CY1JD823J (CY)1/16W-82KJ R227 VRS-TW2AD105J (TW)1/10W-1MJ R303,311,319,516,555, VRN-CY1JQ103D (CY)1/16W-10KD R304,312,320,502,503, VRN-CY1JQ223D (CY)1/16W-22KD 506,507 R305,313,321 VRS-TW2AD221J...
  • Page 59 REF.No. PART CODE DESCRIPTION QTY PRICE C121,124,129- 142,145,147,149,151,1 52,154,158,208,209,21 214,216,217,219,221,2 22,224-226,232- 234,237,244,251,260,3 03-307,309-315,317- VCKYCY1EF104Z F/0.1uF/Z/25V 323,325,326,345- 348,350-353,355- 358,363-370,400- 403,406- 415,423,424,426,427,4 432,434,435,531,540,5 558-560,563,600,609- 617,619-625,627,628 C122,125- 128,220,227,235,246,2 52,300- VCEAPH1CC106M (WX)10uF/16V 302,344,349,354,504,5 06,509,513,524,532,53 5,802 C123,250,374-376 VCKYBT1CX332M X/3300pF/M/16V C143,144,223,231,404, VCKYCY1HB103K B /0.01uF/K/50V 405,507,601,630,631 C146,148,150,155,157, VCKYTQ1CF105Z F/1uF/Z/16V 505,700...
  • Page 60 REF.No. PART CODE DESCRIPTION QTY PRICE No.3-2 GCABA2055YASA FRONT CABINET(CABNET A) No.3-3 GCABB2056YASA REAR CABINET(CABINET B) No.3-4 DANGK2063YASA STAND ARM ASSEMBLY No.3-5 GCOVH2037YASA STAND ARM COVER No.3-6 JBTN-2098YASA KEY BLOCK No.3-7 JKNB-2016YAZZ VR KNOB No.3-8 LANGK2064YASA CONNECTOR ANGLE No.3-9 LANGK2065YASA SHIELD BOARD A No.3-10 LANGK2066YASA...

  • Page 61: Assembly Drawings

    3-25 3-36 3-15 3-24 3-22 3-39 3-27 3-38 3-23 3-25 3-15 3-26 3-17 3-15 3-34 3-17 3-15 3-10 3-21 3-35 3-15 3-31 3-14 3-33 3-17 3-11 3-17 3-18 3-17 3-18 3-18 3-18 3-13 3-18 3-15 3-15 3-19 QD-101MM CABINET PARTS...
  • Page 62 A C AD AP TO R P ROTE CT E R P ACKI NG ADD VGA S IGN A L C A BLE AC CODE M A C S IG N A L C AB LE QD-101MM PACKING OF THE SET...
  • Page 63 QD-101MM DISASSEMBLY AND REASSEMBLY...
  • Page 64 *You should remove the LCD unit(DUNTL2125YAZZ) after removing the Inverter PWB(DUNT-2126YAZZ). <Disassembling method> Please disassemble the QD-101MM according to the following procedure. (1)Remove four rear cabinet screws. (2)Disconnect the FPC cable from the LCD panel. (3)Disconnect the Inverter PWB connector from the Inverter PWB.

  • Page 65: Information

    9. INFORMATION There are some special modifications made to the MAIN PWB. Applied serial number is shown below. From 5AG00011 to 5AG00453 for SEEG. 1. The Diode(VHD1SS226//-) is mounted between the pattern for CN201 and the pattern for 12V-line. (CN201: Connector for Fan motor) [MAIN PWB(FRONT SIDE)] CN201 12V line...
  • Page 66 PRINTED IN GERMANY...

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