3-2
ELECTRICAL TROUBLESHOOTING GUIDE
No 5V_D
or 5V_A .
No 5.2VA.
Is 5.2VA section working?
Is oscillation present at the
Base of Q108?
Replace Q108.
Check L103.
Replace BD101.
(Bridge rectifier)
Check Fuse(F101).
Is 5.2V applied to IC102
Pin 1?
Is there a DC voltage at the
(+) terminal of BD101?
Replace IC101.
Check R127, 128.
(SHUTDOWN CKT)
1. Power(SMPS) Circuit
No VF+
Is 5.2VA section working?
Replace D109.
Is oscillation present at the
anode of D109?
NO
NO
NO
YES
YES
YES
YES
YES
YES
A.
B.
NO
NO
NO
Содержание T512C
Страница 29: ...3 19 3 20 TRACKING LOOP FOCUS LOOP SLED LOOP SPINDLE LOOP WAVEFORM 5 6 5 2 DVD DSP CIRCUIT DIAGRAM...
Страница 30: ...3 21 3 22 3 DRIVE RF CIRCUIT DIAGRAM TRACKING LOOP FOCUS LOOP SLED LOOP SPINDLE LOOP WAVEFORM 1 6 2 3...
Страница 31: ...3 23 3 24 4 MPEG CIRCUIT DIAGRAM Optical Coaxial out CVBS Y Pb Pr Componet Y C S VHS WAVEFORM...
Страница 36: ...3 33 3 34 8 A V JACK CIRCUIT DIAGRAM S VIDEO C AUDIO L AUDIO R OPTICAL COMP VIDEO S VIDEO Y...
Страница 39: ...PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE 3 39 3 40...
Страница 40: ...3 41 3 42 2 POWER A V FRONT P C BOARD LOCATION GUIDE...
Страница 41: ...3 43 3 44 3 KEY P C BOARD LOCATION GUIDE...
Страница 48: ...MEMO MEMO...
Страница 64: ...MEMO...
