3-4
VCR ELECTRICAL TROUBLESHOOTING GUIDE
1. Power(SMPS) CIRCUIT
NO 5.3VA.
Replace the F101
(Use the same Fuse)
Is the F101 normal?
Is the TH01
Normal?
Is the BD101
Normal?
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Replace the BD101
Replace the TH01
Is the D102
normal?
Check or Replace
the D102
Replace the D121
Replace the IC103
Replace the D126
Replace the D129
Replace the D130
Replace the D127
Replace the D128
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Is the Vcc (11V - 18V)
supplied to IC101 Pin2?
NO
Is the D121
normal?
Is there about 2.5V
at the IC103 Pin1?
Is the D126
normal?
Is the D129
normal?
Is the D130
normal?
Is the D127
normal?
Is the D128
normal?
YES
Power Line of Main
PCB(VCR) is short
Summary of Contents for LGXBR342
Page 10: ...OVERALL WIRING DIAGRAM 3 2 ...
Page 36: ...3 36 3 37 EE MODE VIDEO TU MODE AUDIO 2 TU IF CIRCUIT DIAGRAM ...
Page 38: ...3 40 3 41 4 JACK CIRCUIT DIAGRAM ...
Page 44: ...3 52 3 53 PRINTED CIRCUIT DIAGRAMS 1 VCR P C BOARD ...
Page 45: ...3 54 3 55 3 TIMER P C BOARD 2 POWER P C BOARD ...
Page 46: ...3 56 3 57 4 KEY P C BOARD 5 JACK P C BOARD ...
Page 47: ......
Page 60: ...3 70 3 71 CIRCUIT DIAGRAMS 1 E5_BGA POWER UART2 CIRCUIT DIAGRAM ...
Page 61: ...3 72 3 73 2 DDR_SDRAM FLASH CIRCUIT DIAGRAM ...
Page 62: ...3 74 3 75 3 RST CONTROL STATUS_REG ATAPI HOST_CPLD LATCH CIRCUIT DIAGRAM ...
Page 63: ...3 76 3 77 4 1394 ETHERNET_CONNECTOR CIRCUIT DIAGRAM ...
Page 64: ...3 78 3 79 5 VIDEO_IN OUT CIRCUIT DIAGRAM ...
Page 65: ...3 80 3 81 6 AUDIO IN OUT NON STD_VIDEO CIRCUIT DIAGRAM ...
Page 66: ...3 82 3 83 7 AUDIO DAC VIDEO_Y MIXER CIRCUIT DIAGRAM ...
Page 67: ...8 FRONT A V 1934 JACK CIRCUIT DIAGRAM 3 84 3 85 ...
Page 72: ...3 94 3 95 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP VIEW ...
Page 73: ...3 96 3 97 2 MAIN P C BOARD BOTTOM VIEW ...
Page 103: ...3 127 4 IC302 uPD76f0047 MICOM Pin Assignment ...
Page 125: ......
Page 127: ...3 151 3 152 2 DSP CIRCUIT DIAGRAM No Power No operation DSP IC RESET IC SDRAM R259 0Ω ...
Page 129: ...3 155 3 156 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE ...
Page 152: ...MAINTENANCE INSPECTION PROCEDURE 4 22 GEAR F R GEAR AY P2 P3 F R Lever Tension Base Boss CAM ...
Page 161: ...MEMO ...
Page 163: ......