DOWNLOAD Sharp 66FW-54H Service Manual ↓ Size: 6.05 MB | Pages: 80 in PDF or view online for FREE

Model
66FW-54H
Pages
80
Size
6.05 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / CTR / DA100 Repair Notes
File
66fw-54h.pdf
Date

Sharp 66FW-54H Service Manual ▷ View online

DA100 (50Hz) and DA50W Chassis – Repair Notes 
 
Page 3 of 80 
Sharp Electronics (UK) Limited - May 2003 
 
Control and Communication .................................................................... 50 
Revision 3
Faults in the East/West Circuit................................................................................. 35 
CRT PWB ....................................................................................... 36 
Faults on the CRT PWB.......................................................................................... 36 
Class D Output Stages ........................................................................ 37 
Pins 8 and 9 – Frequency ......................................................................................................................................................37 
Pin 12 – Standby/Mute Control Pin ....................................................................................................................................37 
Vertical Stage ................................................................................. 38 
Circuit Operation ................................................................................................. 38 
Vertical Fly-Back ................................................................................................ 38 
Faults in the Vertical Stage..................................................................................... 42 
Audio ........................................................................................... 43 
On Board Circuit Operation ..................................................................................... 43 
Mute Circuit Operation ........................................................................................................................................................43 
Centre Speaker PWB ............................................................................................................................................................44 
Faults in the Audio Circuit...................................................................................................................................................45 
Dolby Pro-Logic Circuit Operation .............................................................................. 47 
Faults in the Dolby Pro-Logic Circuit ................................................................................................................................49 
Communication Lines.............................................................................................. 50 
Parallel Bus ..............................................................................................................................................................................50 
I2C Bus.....................................................................................................................................................................................50 
M3 Bus......................................................................................................................................................................................50 
Slave ......................................................................................................................................................................................... 51 
Reset In ................................................................................................................................................................................... 51 
Reset Out (1)........................................................................................................................................................................... 51 
Reset Out (2).......................................................................................................................................................................... 51 
Reset Operation .................................................................................................. 51 
Protection - Microprocessor..................................................................................... 52 
Audio Output...........................................................................................................................................................................52 
Beam Current ..........................................................................................................................................................................52 
Horizontal Mute .....................................................................................................................................................................52 
AV Link............................................................................................................ 53 
Faults Connected with the Microprocessor ..................................................................... 53 
EPROM’s and NVM’s.............................................................................................. 54 
Blanking the NVM ................................................................................................ 54 
NVM Programming Jig ........................................................................................... 55 
Video and Synchronisation Processor......................................................... 56 
Analogue Front End .............................................................................................. 56 
Input Selector.................................................................................................... 57 
Clamping........................................................................................................... 57 
Automatic Gain Control .......................................................................................... 57 
DA100 (50Hz) and DA50W Chassis – Repair Notes 
 
Page 4 of 80 
Sharp Electronics (UK) Limited - May 2003 
 
Revision 3
Analogue to Digital Converters .................................................................................. 57 
Digitally Controlled Clock Oscillator ............................................................................ 57 
Analogue Video Output........................................................................................... 57 
Average Beam Current Limiting ................................................................................. 57 
Protection Circuitry .............................................................................................. 57 
Scan Velocity Modulation Output ............................................................................... 58 
Protection – Video/Sync Processor.............................................................................. 58 
Safety.......................................................................................................................................................................................58 
Vertical Protection (VPROT)...............................................................................................................................................58 
Faults Connected to the VDP.................................................................................... 59 
Picture Rotation................................................................................ 60 
Circuit Description ............................................................................................... 60 
Scan Velocity Modulator ...................................................................... 61 
Circuit Description ............................................................................................... 61 
Faults in the Picture Rotation and Scan Velocity Modulator Circuit ......................................... 62 
Preventative Maintenance ..................................................................... 63 
Servicing Tips .................................................................................. 64 
Error Codes....................................................................................................... 67 
Part Changes ................................................................................... 68 
Remote Control Battery Covers ................................................................................. 68 
CRT Types ........................................................................................................ 68 
Service Mode .................................................................................. 69 
Entering the Service Mode ...................................................................................... 69 
Geometry Adjustments........................................................................................... 70 
G2 Setting ........................................................................................................ 70 
G2 Adjustment ................................................................................................... 70 
Grey Scale Adjustment .......................................................................................... 71 
Voltage Tables ................................................................................. 72 
IC1001 – Microprocessor ........................................................................................ 73 
IC801 – Video Sync Processor (VDP) ........................................................................... 74 
IC305 – Multiple Sound Processor (MSP)....................................................................... 75 
IC1801 – Cathode Drive Amplifier (CDA) ...................................................................... 76 
IC301 / IC302 - Audio Amplifiers ............................................................................. 77 
IC702 - Primary Control ........................................................................................ 77 
IC501 - Vertical Output ........................................................................................ 78 
IC1003 - NVM ................................................................................................... 78 
IC2401 - Megatext.............................................................................................. 79 
IC201 - IF ....................................................................................................... 80 
 
DA100 (50Hz) and DA50W Chassis – Repair Notes 
 
Page 5 of 80 
Sharp Electronics (UK) Limited - May 2003 
 
Revision 3
Figures 
Figure 1: DA100 (50Hz) Chassis – model 56FW53H .................................................................................................................7 
Figure 2: Power Supply Layout (Component Side).................................................................................................................... 13 
Figure 3: Power Supply Component Locations (Print Side) .................................................................................................... 13 
Figure 4: Location of Supply Measurement Points................................................................................................................... 14 
Figure 5: Power Supply Schematic Diagram.............................................................................................................................. 15 
Figure 6: Q701 Gate Waveform................................................................................................................................................... 16 
Figure 7: Standby Power Supply .................................................................................................................................................. 17 
Figure 8: Degauss Circuit .............................................................................................................................................................. 18 
Figure 9: +5V Generation Circuit ................................................................................................................................................. 19 
Figure 10: 3.3V Regulation Circuit............................................................................................................................................... 19 
Figure 11: Location of R792 ..........................................................................................................................................................20 
Figure 12: Location of R623..........................................................................................................................................................20 
Figure 13: Power Factor Circuit (56FW53H)............................................................................................................................ 21 
Figure 14: Power Factor Correction PWB – 66 and 76cm Models (PWB on left)..............................................................22 
Figure 15: 56FW53H Power Factor Correction PWB..............................................................................................................22 
Figure 16: Location of 56FW53H Power Factor PWB.............................................................................................................22 
Figure 17: Location of D735 .........................................................................................................................................................23 
Figure 18: Location of Audio Stage components (Main PWB) ...............................................................................................23 
Figure 19: Location of Centre Speaker PWB ............................................................................................................................24 
Figure 20: Location of Components on the CRT PWB .............................................................................................................24 
Figure 21: Location of SMD Capacitor on IC708 .....................................................................................................................25 
Figure 22: Horizontal Output Stage...........................................................................................................................................27 
Figure 23: Location of Horizontal Stage Components ............................................................................................................28 
Figure 24: Q601 Base Drive Waveform .....................................................................................................................................28 
Figure 25: GF Focus Modulator Circuit ......................................................................................................................................29 
Figure 26: Picture of the FW Focus Modulator PWB .............................................................................................................29 
Figure 27: FW Focus Modulator Circuit.....................................................................................................................................30 
Figure 28: Location of Link Wire JL2 ........................................................................................................................................ 31 
Figure 29: East West Circuit .......................................................................................................................................................32 
Figure 30: East/West Circuit – Print Side................................................................................................................................33 
Figure 31: East/West Circuit - Component Side......................................................................................................................33 
Figure 32: East/West Drive Waveform - Pin 32 of IC801....................................................................................................34 
Figure 33: 66cm and 76cm CRT PWB .........................................................................................................................................36 
Figure 34: 56FW53H CRT PWB...................................................................................................................................................36 
Figure 35: Vertical Output Amplifier.........................................................................................................................................38 
Figure 36: Vertical Fly-back Circuit ...........................................................................................................................................39 
Figure 37: Vertical Protection Signal (VPROT - Pin 11 of IC801) ........................................................................................39 
Figure 38: Vertical Scan Coil Waveform - Top of Coil ...........................................................................................................40 
Figure 39: Vertical Scan Coil Waveform - Bottom of Coil.....................................................................................................40 
Figure 40: Vertical Stage - Component Side ............................................................................................................................ 41 
Figure 41: Vertical Stage - Print Side........................................................................................................................................ 41 
Figure 42: Audio Amplifier Circuit (left channel)....................................................................................................................43 
DA100 (50Hz) and DA50W Chassis – Repair Notes 
 
Page 6 of 80 
Sharp Electronics (UK) Limited - May 2003 
 
Revision 3
 Figure 43: Centre Speaker PWB Location................................................................................................................................44 
Figure 44: Centre Speaker Circuit Diagram..............................................................................................................................44 
Figure 45: Centre Speaker Modification 1 ................................................................................................................................45 
Figure 46: Centre Speaker PWB Modification 2......................................................................................................................46 
Figure 47: Pro-Logic PWB..............................................................................................................................................................47 
Figure 48: Dolby Pro-Logic Circuit Diagram (66GF64H)........................................................................................................48 
Figure 49: Dolby Pro-Logic PWB Connector ..............................................................................................................................49 
Figure 50: Communication Block Diagram ..................................................................................................................................50 
Figure 51: Reset Timing ................................................................................................................................................................. 51 
Figure 52: Audio Protection Circuit ............................................................................................................................................52 
Figure 53: Horizontal Mute Circuit.............................................................................................................................................52 
Figure 54: AV Link Schematic Diagram......................................................................................................................................53 
Figure 55: Internal Architecture of IC801 (VDP 3120) ........................................................................................................56 
Figure 56: VDP Protection Circuits .............................................................................................................................................58 
Figure 57: Position of C824 ..........................................................................................................................................................59 
Figure 58: Picture Rotation Circuit (located on CRT PWB) ...................................................................................................60 
Figure 59: Scan Velocity Modulator Circuit.............................................................................................................................. 61 
Figure 60: SVM and Tilt Coil Connectors...................................................................................................................................62 
Figure 61: CRT Base PWB Modification (66cm and 76cm sets only) ...................................................................................63 
Figure 62: Fault Finding Flow Chart 1.........................................................................................................................................65 
Figure 63: Fault Finding Flow Chart 2 ........................................................................................................................................66 
Figure 64: LED Fault Code Table.................................................................................................................................................67 
Figure 65: HW OPC LED Error Code Jig ...................................................................................................................................67 
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Sharp 66FW-54H Service Manual ▷ Download

  • DOWNLOAD Sharp 66FW-54H Service Manual ↓ Size: 6.05 MB | Pages: 80 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp 66FW-54H in PDF for free, which will help you to disassemble, recover, fix and repair Sharp 66FW-54H CTR. Information contained in Sharp 66FW-54H Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.