3-10
4. OSD CIRCUIT
(1) I
2
C BUS CHECK
Keys do not work
Is 5V applied to IC501
Pin78?
Does FLD change when
a function button is
pressed?
No I
2
C bus communication
Does Power appear at the
Pull up impedence
(R569, R507)?
Replace IC501.
Refer to “SMPS 5.3VA
Trouble Shooting”.
Replace the defective
switches.
Refer to “SMPS 5.3VA
Trouble Shooting”.
YES
YES
NO
NO
NO
2. SERVO CIRCUIT
(4) Keys do not work
VCR ELECTRICAL TROUBLESHOOTING GUIDE
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: ......