Service Manual
Page 1
... original condition and only parts identical to change without notice. LCD COLOR TELEVISION/ DVD VIDEO PLAYER MODEL LC-26AD22U In the interests of user-safety (Required by safety regulations in some countries) the set should be used... DVD FIRMWARE C-2 • RE-WRITE FOR DIGITAL SOFT FIRMWARE C-3 • WHEN REPLACING EEPROM (MEMORY) IC C-4 • ELECTRICAL ADJUSTMENTS D-1~D-5 • TROUBLESHOOTING GUIDE E-1~E-10 • BLOCK DIAGRAM ...F-1~F-8 • PRINTED CIRCUIT BOARDS G-1~G-10 • SCHEMATIC DIAGRAMS ...H-1~H-48 • WAVEFORMS ...I-1, I-2 • MECHANICAL EXPLODED...
... original condition and only parts identical to change without notice. LCD COLOR TELEVISION/ DVD VIDEO PLAYER MODEL LC-26AD22U In the interests of user-safety (Required by safety regulations in some countries) the set should be used... DVD FIRMWARE C-2 • RE-WRITE FOR DIGITAL SOFT FIRMWARE C-3 • WHEN REPLACING EEPROM (MEMORY) IC C-4 • ELECTRICAL ADJUSTMENTS D-1~D-5 • TROUBLESHOOTING GUIDE E-1~E-10 • BLOCK DIAGRAM ...F-1~F-8 • PRINTED CIRCUIT BOARDS G-1~G-10 • SCHEMATIC DIAGRAMS ...H-1~H-48 • WAVEFORMS ...I-1, I-2 • MECHANICAL EXPLODED...
Service Manual
Page 30
No No Is there voltage at pin No 1 of IC401 19V? Yes Change DIGITAL PCB. Check IC402 and peripheral circuit. Yes Yes Is R412 broken? Check IC401 and peripheral circuit. Yes No Is there voltage at pin 10 of IC402 6V? Change R412. TROUBLESHOOTING GUIDE (LCD SECTION) POWER DOES NOT TUNER ON Is F401 broken? Change F401. E-1
No No Is there voltage at pin No 1 of IC401 19V? Yes Change DIGITAL PCB. Check IC402 and peripheral circuit. Yes Yes Is R412 broken? Check IC401 and peripheral circuit. Yes No Is there voltage at pin 10 of IC402 6V? Change R412. TROUBLESHOOTING GUIDE (LCD SECTION) POWER DOES NOT TUNER ON Is F401 broken? Change F401. E-1
Service Manual
Page 31
No Yes Is there signal at pins 28 and 30 of IC701? No Yes Is there signal at pins 1 and 20 of CP1001? TROUBLESHOOTING GUIDE THE PICTURE APPEARS, BUT THE AUDIO DOES NOT APPEARS. (ATRFMODE) No Is CP1001 connected? No Yes Is there signal at pins Yes 1 and 4 of ...
No Yes Is there signal at pins 28 and 30 of IC701? No Yes Is there signal at pins 1 and 20 of CP1001? TROUBLESHOOTING GUIDE THE PICTURE APPEARS, BUT THE AUDIO DOES NOT APPEARS. (ATRFMODE) No Is CP1001 connected? No Yes Is there signal at pins Yes 1 and 4 of ...
Service Manual
Page 32
No No Is there signal at pins 7, Yes 8, 10, 11, 13, 14, 16, 17, 19 and 20 of CD7201? Check Q3410 and peripheral circuit. E-3 TROUBLESHOOTING GUIDE THE PICTURE DOES NOT APPEAR (1) No Does backlight shine? Change IC2405. Yes Check DIGITAL PCB. Yes Is there signal at IC2405? Check D436, D437 and peripheral circuit. Yes No Is CD7201 connected? Yes Connected CD7201. Is there voltage at pin No 28,29,30 and 31 of CP406 12V? Yes Is there voltage at pins No 1, 2,3, 4and 5 of CP2407 12V? Change V2301(PANEL).
No No Is there signal at pins 7, Yes 8, 10, 11, 13, 14, 16, 17, 19 and 20 of CD7201? Check Q3410 and peripheral circuit. E-3 TROUBLESHOOTING GUIDE THE PICTURE DOES NOT APPEAR (1) No Does backlight shine? Change IC2405. Yes Check DIGITAL PCB. Yes Is there signal at IC2405? Check D436, D437 and peripheral circuit. Yes No Is CD7201 connected? Yes Connected CD7201. Is there voltage at pin No 28,29,30 and 31 of CP406 12V? Yes Is there voltage at pins No 1, 2,3, 4and 5 of CP2407 12V? Change V2301(PANEL).
Service Manual
Page 33
No Yes Is there signal at pins 33 and 35 of IC2401? Check IC2401 and peripheral circuit. Check IC701 and peripheral circuit. TROUBLESHOOTING GUIDE THE PICTURE DOES NOT APPEAR (2) No Is there signal at C2528 and C2532? Check IC2401 and peripheral circuit. Yes Yes Is there signal at pins A9 and A13 of IC701? E-4 No Check C2528, C2532 and peripheral circuit.
No Yes Is there signal at pins 33 and 35 of IC2401? Check IC2401 and peripheral circuit. Check IC701 and peripheral circuit. TROUBLESHOOTING GUIDE THE PICTURE DOES NOT APPEAR (2) No Is there signal at C2528 and C2532? Check IC2401 and peripheral circuit. Yes Yes Is there signal at pins A9 and A13 of IC701? E-4 No Check C2528, C2532 and peripheral circuit.
Service Manual
Page 34
TROUBLESHOOTING GUIDE THE COLOR DOES NOT APPEAR Is setting of IC701? Check Q701,Q702 and peripheral circuit. Receive the color signal. Yes Check IC701 and peripheral circuit. Change DIGITAL PCB. E-5 No Is there color signal at Yes pins A9 and A13 of IC2401? Yes No Is the color signal received? Yes Is there color signal at No pins 33 and 35 of color No normal? Adjust the color.
TROUBLESHOOTING GUIDE THE COLOR DOES NOT APPEAR Is setting of IC701? Check Q701,Q702 and peripheral circuit. Receive the color signal. Yes Check IC701 and peripheral circuit. Change DIGITAL PCB. E-5 No Is there color signal at Yes pins A9 and A13 of IC2401? Yes No Is the color signal received? Yes Is there color signal at No pins 33 and 35 of color No normal? Adjust the color.
Service Manual
Page 35
Change IC4001. Check the disc. E-6 No Does IC4001 gets Yes P.CON+3.3V and P.CON+1.8V? Check pins 12 and 16 of IC4001? No Check P.CON+3.3V and P.CON+1.8V line. (DVD SECTION) DOES NOT DISPLAY DVD PICTURE TROUBLESHOOTING GUIDE Does this have signal Yes at pins 149 and 151 of CP8501 and peripheral circuit. No Does this display Yes logo picture?
Change IC4001. Check the disc. E-6 No Does IC4001 gets Yes P.CON+3.3V and P.CON+1.8V? Check pins 12 and 16 of IC4001? No Check P.CON+3.3V and P.CON+1.8V line. (DVD SECTION) DOES NOT DISPLAY DVD PICTURE TROUBLESHOOTING GUIDE Does this have signal Yes at pins 149 and 151 of CP8501 and peripheral circuit. No Does this display Yes logo picture?
Service Manual
Page 36
Yes Change IC4001. TROUBLESHOOTING GUIDE DISC DOES NOT EJECT Does OSD appear No on the screen? Yes Is remote key set No effectively? Does this have signal at No pins 1 and 2 of CP2302? Yes Does this eject disc at No pins 4 and 5 of CP2302? Check IC2301 and peripheral circuit. E-7 Yes Change DVD DECK. Does this have signal at No change DVD DECK? Check pins AD18 and AF19 of IC4001 and peripheral circuit. Change IC2301. Yes Check pins 138 and 139 of IC2401 and peripheral circuit.
Yes Change IC4001. TROUBLESHOOTING GUIDE DISC DOES NOT EJECT Does OSD appear No on the screen? Yes Is remote key set No effectively? Does this have signal at No pins 1 and 2 of CP2302? Yes Does this eject disc at No pins 4 and 5 of CP2302? Check IC2301 and peripheral circuit. E-7 Yes Change DVD DECK. Does this have signal at No change DVD DECK? Check pins AD18 and AF19 of IC4001 and peripheral circuit. Change IC2301. Yes Check pins 138 and 139 of IC2401 and peripheral circuit.
Service Manual
Page 37
Change DVD DECK. Yes Change IC4001. Change DVD DECK. No Is the voltage between JG017 and JG018 less than 0.6V? E-8 Change IC4001. No Connect CD2301. Yes No Does disc rotate? TROUBLESHOOTING GUIDE DOES NOT PLAY DVD Does this display No reading mark? No Does CD2001 connect Yes with CP2301 correctly? Yes Does this display Yes "INCORRECT DISC"?
Change DVD DECK. Yes Change IC4001. Change DVD DECK. No Is the voltage between JG017 and JG018 less than 0.6V? E-8 Change IC4001. No Connect CD2301. Yes No Does disc rotate? TROUBLESHOOTING GUIDE DOES NOT PLAY DVD Does this display No reading mark? No Does CD2001 connect Yes with CP2301 correctly? Yes Does this display Yes "INCORRECT DISC"?
Service Manual
Page 38
No Connect CD2301. Yes Does this display Yes "INCORRECT DISC"? E-9 No Does CD2001 connect Yes with CP2301 correctly? No Is the voltage between JG019 and JG018 less than 0.6V? Change DVD DECK. Change DVD DECK. Change IC4001. Yes No Does disc rotate? Yes Change IC4001. TROUBLESHOOTING GUIDE DOES NOT PLAY CD Does this display No reading mark?
No Connect CD2301. Yes Does this display Yes "INCORRECT DISC"? E-9 No Does CD2001 connect Yes with CP2301 correctly? No Is the voltage between JG019 and JG018 less than 0.6V? Change DVD DECK. Change DVD DECK. Change IC4001. Yes No Does disc rotate? Yes Change IC4001. TROUBLESHOOTING GUIDE DOES NOT PLAY CD Does this display No reading mark?
Service Manual
Page 39
... Yes pins 113, 114, 115 and 116 of IC4001? Check IC4001 and peripheral circuit. Does this have signal Yes at pins 8 and 10 of CP8501? TROUBLESHOOTING GUIDE NO SOUND DVD/CD ANALOG AUDIO Does this have signal Yes at pin1 of CP8501? No Does this have signal at Yes pins 1 and...
... Yes pins 113, 114, 115 and 116 of IC4001? Check IC4001 and peripheral circuit. Does this have signal Yes at pins 8 and 10 of CP8501? TROUBLESHOOTING GUIDE NO SOUND DVD/CD ANALOG AUDIO Does this have signal Yes at pin1 of CP8501? No Does this have signal at Yes pins 1 and...