Service Manual
Page 1
The contents are subject to be used for after sales service only. ######### LCD COLOR TELEVISION MODEL LC-26SH10U In the interests of user-safety (Required by safety regulations in some countries) the ...8226; SERVICE MODE LIST ...C-1 • WHEN REPLACING EEPROM (MEMORY) IC C-2 • RE-WRITE FOR DIGITAL SOFT FIRMWARE C-3 • ELECTRICAL ADJUSTMENTS D-1~D-3 • TROUBLESHOOTING GUIDE E-1~E-7 • BLOCK DIAGRAM ...F-1~F-10 • PRINTED CIRCUIT BOARDS G-1~G-14 • SCHEMATIC DIAGRAMS ...H-1~H-52 • WAVEFORMS ...I-1~I-3 • MECHANICAL EXPLODED VIEWS J-1~J-4 ...
The contents are subject to be used for after sales service only. ######### LCD COLOR TELEVISION MODEL LC-26SH10U In the interests of user-safety (Required by safety regulations in some countries) the ...8226; SERVICE MODE LIST ...C-1 • WHEN REPLACING EEPROM (MEMORY) IC C-2 • RE-WRITE FOR DIGITAL SOFT FIRMWARE C-3 • ELECTRICAL ADJUSTMENTS D-1~D-3 • TROUBLESHOOTING GUIDE E-1~E-7 • BLOCK DIAGRAM ...F-1~F-10 • PRINTED CIRCUIT BOARDS G-1~G-14 • SCHEMATIC DIAGRAMS ...H-1~H-52 • WAVEFORMS ...I-1~I-3 • MECHANICAL EXPLODED VIEWS J-1~J-4 ...
Service Manual
Page 19
YES NO IS THERE VOLTAGE NO AT PIN 4 OF IC503 20.5V ? YES IS THERE VOLTAGE NO AT PIN 2 OF IC3804 AT3.3V ? CHECK IC503 AND PERIPHERAL CIRCUIT. CHECK IC506 AND PERIPHERAL CIRCUIT. TROUBLESHOOTING GUIDE POWER DOES NOT TURN ON IS F501 BROKEN ? OR CHANGE POWER PCB. YES CHANGE SCALER PCB. OR CHANGE AV PCB. E-1 YES IS THERE VOLTAGE NO AT PIN 4 OF IC506 AT5V ? CHECK IC3804 AND PERIPHERAL CIRCUIT. CHANGE F501.
YES NO IS THERE VOLTAGE NO AT PIN 4 OF IC503 20.5V ? YES IS THERE VOLTAGE NO AT PIN 2 OF IC3804 AT3.3V ? CHECK IC503 AND PERIPHERAL CIRCUIT. CHECK IC506 AND PERIPHERAL CIRCUIT. TROUBLESHOOTING GUIDE POWER DOES NOT TURN ON IS F501 BROKEN ? OR CHANGE POWER PCB. YES CHANGE SCALER PCB. OR CHANGE AV PCB. E-1 YES IS THERE VOLTAGE NO AT PIN 4 OF IC506 AT5V ? CHECK IC3804 AND PERIPHERAL CIRCUIT. CHANGE F501.
Service Manual
Page 20
NO YES IS THERE VOLTAGE AT NO PINS 1, 2, 3, 4 AND 5 OF CP505 24V ? YES IS THERE SIGNAL AT CP7203 ? NO YES IS THERE SIGNAL NO AT IC7201 ? CHANGE IC7201. OR CHANGE SCALER PCB. E-2 YES CHECK IC502, T502 AND PERIPHERAL CIRCUIT. NO IS CD7204 CONNECTED ? CHANGE V2301. CONNECT CD7204. TROUBLESHOOTING GUIDE THE PICTURE DOES NOT APPEAR (1). DOSE BACK LIGHT SHINE ? YES CHECK IC801.
NO YES IS THERE VOLTAGE AT NO PINS 1, 2, 3, 4 AND 5 OF CP505 24V ? YES IS THERE SIGNAL AT CP7203 ? NO YES IS THERE SIGNAL NO AT IC7201 ? CHANGE IC7201. OR CHANGE SCALER PCB. E-2 YES CHECK IC502, T502 AND PERIPHERAL CIRCUIT. NO IS CD7204 CONNECTED ? CHANGE V2301. CONNECT CD7204. TROUBLESHOOTING GUIDE THE PICTURE DOES NOT APPEAR (1). DOSE BACK LIGHT SHINE ? YES CHECK IC801.
Service Manual
Page 21
YES CHECK IC801 AND PERIPHERAL CIRCUIT. CHECK IC4201 AND PERIPHERAL CIRCUIT. E-3 YES IS CD4203 CONNECTED NO AND IS THERE SIGNAL ? CONNECT CD4203. IS THERE SIGNAL NO AT IC4201 ? TROUBLESHOOTING GUIDE THE PICTURE DOES NOT APPEAR (2). CHECK IC4201 AND PERIPHERAL CIRCUIT.
YES CHECK IC801 AND PERIPHERAL CIRCUIT. CHECK IC4201 AND PERIPHERAL CIRCUIT. E-3 YES IS CD4203 CONNECTED NO AND IS THERE SIGNAL ? CONNECT CD4203. IS THERE SIGNAL NO AT IC4201 ? TROUBLESHOOTING GUIDE THE PICTURE DOES NOT APPEAR (2). CHECK IC4201 AND PERIPHERAL CIRCUIT.
Service Manual
Page 22
IS CD301 AND CD303 NO CONNECTED ? YES IS THERE SIGNAL CD301 AND CD303 ? CHECK IC904 AND PERIPHERAL CIRCUIT. YES CHANGE AV PCB. CHECK IC301 AND PERIPHERAL CIRCUIT. TROUBLESHOOTING GUIDE THE PICTURE APPEARS, BUT THE AUDIO DOES NOT APPEAR. NO YES IS THERE SIGNAL NO AT PINS 27 AND 28 OF IC904 ? E-4 CONNECT CD301 AND CD303. NO YES IS THERE SIGNAL AT PINS 11 AND 15 OF IC301 ? CHANGE SP301 AND SP302.
IS CD301 AND CD303 NO CONNECTED ? YES IS THERE SIGNAL CD301 AND CD303 ? CHECK IC904 AND PERIPHERAL CIRCUIT. YES CHANGE AV PCB. CHECK IC301 AND PERIPHERAL CIRCUIT. TROUBLESHOOTING GUIDE THE PICTURE APPEARS, BUT THE AUDIO DOES NOT APPEAR. NO YES IS THERE SIGNAL NO AT PINS 27 AND 28 OF IC904 ? E-4 CONNECT CD301 AND CD303. NO YES IS THERE SIGNAL AT PINS 11 AND 15 OF IC301 ? CHANGE SP301 AND SP302.
Service Manual
Page 23
YES IS DIGITAL PCB NO CONNECTED ? CONNECT CD3806. CONNECT DIGITAL PCB. CHECK Q512, IC509 AND PERIPHERAL CIRCUIT. YES CHANGE DIGITAL PCB. THE STOP PICTURE "PLEASE WAIT". YES IS THERE VOLTAGE NO AT PINS 1 AND 2 OF CD3806 5V ? E-5 TROUBLESHOOTING GUIDE NO IS CD3806 CONNECTED ?
YES IS DIGITAL PCB NO CONNECTED ? CONNECT CD3806. CONNECT DIGITAL PCB. CHECK Q512, IC509 AND PERIPHERAL CIRCUIT. YES CHANGE DIGITAL PCB. THE STOP PICTURE "PLEASE WAIT". YES IS THERE VOLTAGE NO AT PINS 1 AND 2 OF CD3806 5V ? E-5 TROUBLESHOOTING GUIDE NO IS CD3806 CONNECTED ?
Service Manual
Page 24
YES IS THERE SIGNAL NO AT IC7201 ? E-6 RECEIVE THE COLOR SIGNAL. CHECK IC801 AND PERIPHERAL CIRUCUIT. IS SETTING OF NO COLOR NORMAL ? YES IS THERE SIGNAL NO AT IC801 ? YES IS THE COLOR NO SIGNAL RECEIVED ? CHANGE THE SETTING OF COLOR. YES CHANGE SCALER PCB. TROUBLESHOOTING GUIDE THE COLOR DOES NOT APPEAR. CHECK IC7201 AND PERIPHERAL CIRUCUIT.
YES IS THERE SIGNAL NO AT IC7201 ? E-6 RECEIVE THE COLOR SIGNAL. CHECK IC801 AND PERIPHERAL CIRUCUIT. IS SETTING OF NO COLOR NORMAL ? YES IS THERE SIGNAL NO AT IC801 ? YES IS THE COLOR NO SIGNAL RECEIVED ? CHANGE THE SETTING OF COLOR. YES CHANGE SCALER PCB. TROUBLESHOOTING GUIDE THE COLOR DOES NOT APPEAR. CHECK IC7201 AND PERIPHERAL CIRUCUIT.
Service Manual
Page 25
YES CHANGE SCALER PCB. E-7 TROUBLESHOOTING GUIDE ON SCREEN DISPLAY DOES NOT APPEAR. IS THERE SIGNAL AT NO PINS 2, 3, 4 AND 5 OF IC101 ? CHECK IC801AND PERIPHERAL CIRCUIT. CHECK IC101 AND PERIPHERAL CIRCUIT. YES IS THE COLOR SIGNAL NO AT PINS 57, 58, 59 AND 60 OF IC801 ?
YES CHANGE SCALER PCB. E-7 TROUBLESHOOTING GUIDE ON SCREEN DISPLAY DOES NOT APPEAR. IS THERE SIGNAL AT NO PINS 2, 3, 4 AND 5 OF IC101 ? CHECK IC801AND PERIPHERAL CIRCUIT. CHECK IC101 AND PERIPHERAL CIRCUIT. YES IS THE COLOR SIGNAL NO AT PINS 57, 58, 59 AND 60 OF IC801 ?