25
TROUBLESHOOTING
Is there voltage change on
pin 7,8 of RF101 during
operating by remote control
NO
Working well.
Is there voltage change
same as above on pin
60,61 of IC107?
NO
Check the R124,R125,R193,
R194,R129,R130,R163,R164,
R111,R112,R684,R685
YES
Check the main IIC.
YES
Is there voltage change
same as above on pin
53,98,99 of IC107?
NO
Check the IC107 and Power.
YES
Is there voltage change
same as above on pin 2
of Q108,Q109
NO
Check the Q103,Q104,R169,
R170,R612,R613
YES
When RF sound doesn't come out.
Summary of Contents for DHD-4000D
Page 30: ...29 BLOCK DIAGRAM VIDEO BLOCK ...
Page 32: ...31 BLOCK DIAGRAM TUNER BLOCK ...
Page 40: ...39 SCHEMATIC DIAGRAM ...
Page 44: ...43 SCHEMATIC DIAGRAM SCHEMATIC DIAGRAM ...
Page 45: ...44 COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW ...
Page 49: ......
Page 66: ...686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA DAEWOO ELECTRONICS Corp ...
