3-60
VDR ELECTRICAL TROUBLESHOOTING GUIDE
When playing DISC,
no audio output
Check IC2078 power
and other circuits
IC7601-1 : HIGH
DAC RESET status
Check IC7601 power
And Other circuits
IC7601-8, 9 I
2
C sig-
nal normal
NO
NO
Check R110, R109,
R7637, R7638
YES
YES
No OPTICAL /
DIGITAL output
Check VCR PART
IC7401-1
signal normal
Check FFC Cable
Signal flow
NO
YES
No TUNER
audio output
<when playing DISC,
no audio output> check
Audio output even
When playing DISC
PN7401-6, 7 :
6, 7 Low
NO
Check IC2076 power and
R2602, R2603 signal
Check FFC Cable
and VCR part
Check IC6904 power
and other circuits
Check IC2078 – 15
and power, other circuits
NO
NO
NO
NO
YES
PN7601-19~22
Check audio signals
IC6904 – 1, 7
Check audio signals
IC6905-16
Check High?
Check IC6905 power
And Other circuits
YES
YES
YES
YES
Содержание LGXBR342
Страница 10: ...OVERALL WIRING DIAGRAM 3 2 ...
Страница 36: ...3 36 3 37 EE MODE VIDEO TU MODE AUDIO 2 TU IF CIRCUIT DIAGRAM ...
Страница 38: ...3 40 3 41 4 JACK CIRCUIT DIAGRAM ...
Страница 44: ...3 52 3 53 PRINTED CIRCUIT DIAGRAMS 1 VCR P C BOARD ...
Страница 45: ...3 54 3 55 3 TIMER P C BOARD 2 POWER P C BOARD ...
Страница 46: ...3 56 3 57 4 KEY P C BOARD 5 JACK P C BOARD ...
Страница 47: ......
Страница 60: ...3 70 3 71 CIRCUIT DIAGRAMS 1 E5_BGA POWER UART2 CIRCUIT DIAGRAM ...
Страница 61: ...3 72 3 73 2 DDR_SDRAM FLASH CIRCUIT DIAGRAM ...
Страница 62: ...3 74 3 75 3 RST CONTROL STATUS_REG ATAPI HOST_CPLD LATCH CIRCUIT DIAGRAM ...
Страница 63: ...3 76 3 77 4 1394 ETHERNET_CONNECTOR CIRCUIT DIAGRAM ...
Страница 64: ...3 78 3 79 5 VIDEO_IN OUT CIRCUIT DIAGRAM ...
Страница 65: ...3 80 3 81 6 AUDIO IN OUT NON STD_VIDEO CIRCUIT DIAGRAM ...
Страница 66: ...3 82 3 83 7 AUDIO DAC VIDEO_Y MIXER CIRCUIT DIAGRAM ...
Страница 67: ...8 FRONT A V 1934 JACK CIRCUIT DIAGRAM 3 84 3 85 ...
Страница 72: ...3 94 3 95 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP VIEW ...
Страница 73: ...3 96 3 97 2 MAIN P C BOARD BOTTOM VIEW ...
Страница 103: ...3 127 4 IC302 uPD76f0047 MICOM Pin Assignment ...
Страница 108: ...3 132 3 Main Clock2 for IC302 20MHz GND LEVEL X301 IC302 PIN 13 4 SDRAM Clock GND LEVEL MCLK IC201 PIN 35 ...
Страница 125: ......
Страница 127: ...3 151 3 152 2 DSP CIRCUIT DIAGRAM No Power No operation DSP IC RESET IC SDRAM R259 0Ω ...
Страница 129: ...3 155 3 156 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE ...
Страница 152: ...MAINTENANCE INSPECTION PROCEDURE 4 22 GEAR F R GEAR AY P2 P3 F R Lever Tension Base Boss CAM ...
Страница 161: ...MEMO ...
Страница 163: ......