3-11
4. Y/C CIRCUIT
(1) No Video in EE Mode,
No Video in EE Mode
Does the Video signal
appear at IC301 Pin15?
Check the IC802 Pin31.
Is REG 5.0V applied to
IC301Pins4, 22, 47, 50, 52,
60, 84, 92?
Does the Video signal
appear at IC301 Pin29?
Does the Video signal
appear at the PVM02
Pin12?
Does the Video signal
appear at the PVM02
Pin25?
Check the 5.0V, 5.3VA
Line. (Power Circuit)
Is I
2
C BUS signal applied to
the IC301 Pins73, 74?
Check C361. (AGC)
Replace IC301.
Check the Video Buffer
Q905.
Check the DVD Board
Video path.
Check the System Circuit.
(Refer to ‘SYSTEM I
2
C BUS
CHECK Trouble Shooting’)
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Does the Video signal
appear at the IC802
Pin29?
IC802 Pins2, 4(Vcc),
Pins32, 33(I
2
C BUS)
YES
NO
NO
Does the Video signal
appear at the IC901
Pin6?
Does the 12VT, 5.3VA
appear at the IC901 Pin5,6.
Check the 12V, 5.4VA
Line. (Power Circuit)
Replace IC901.
YES
NO
NO
VCR ELECTRICAL TROUBLESHOOTING GUIDE
Содержание RC-185
Страница 1: ...SERVICE MANUAL LG RC 185 MODEL ...
Страница 41: ...3 34 3 35 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 2 TUNER CIRCUIT DIAGRAM ...
Страница 42: ...3 36 3 37 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 3 A V CIRCUIT DIAGRAM ...
Страница 43: ...3 38 3 39 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 4 Hi Fi CIRCUIT DIAGRAM ...
Страница 44: ...3 40 3 41 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 5 SYSTEM CIRCUIT DIAGRAM ...
Страница 46: ...3 44 3 45 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 7 KEY CIRCUIT DIAGRAM ...
Страница 52: ...3 56 3 57 PRINTED CIRCUIT DIAGRAMS 1 VCR P C BOARD TOP VIEW ...
Страница 53: ...3 58 3 59 2 VCR P C BOARD BOTTOM VIEW ...
Страница 54: ...3 60 3 61 3 SMPS P C BOARD 4 HDMI P C BOARD HDMI MODEL ONLY TOP VIEW BOTTOM VIEW ...
Страница 55: ...3 62 3 63 5 KARAOKE P C BOARD KARAOKE MODEL ONLY ...
Страница 56: ...3 64 3 65 6 KEY P C BOARD 8 TOOL 9 TOOL 7 TOOL ...
Страница 57: ......
Страница 84: ...3 100 3 101 PRINTED CIRCUIT DIAGRAMS 1 VDR P C BOARD TOP VIEW ...
Страница 85: ...3 102 3 103 2 VDR P C BOARD BOTTOM VIEW ...
Страница 117: ......
Страница 134: ...5 17 2 DISC SPECIFICATION 3 DISC MATERIALS 1 DVD ROM Single Layer Dual Layer ...
Страница 159: ......
Страница 160: ...5 42 5 43 CIRCUIT DIAGRAMS 1 DSP CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Страница 161: ...5 44 5 45 2 RF CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Страница 162: ...5 46 5 47 3 DRIVE CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Страница 164: ...5 50 5 51 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP VIEW ...
Страница 165: ...5 52 5 53 2 MAIN P C BOARD BOTTOM VIEW ...