3-2
ELECTRICAL TROUBLESHOOTING GUIDE
No 5V_A .
No 5.2VA.
Is 5.2VA section working?
Is 5.2V present at emitter
of Q107?
Replace Q107.
Is there a DC voltage At
(+) terminal of BD101?
Is there a DC voltage at
R101?
Replace IC101.
Check F101
1. Power check flow
No VF+
Is 5.2VA section working?
Replace D109.
Check F102
NO
NO
YES
YES
YES
YES
Replace R101.
YES
Replace BD101.
YES
YES
A.
B.
NO
NO
NO
NO
Summary of Contents for SD-4900
Page 1: ...SERVICE MANUAL DVD VIDEO PLAYER FILE NO 810 200327 DOCUMENT CREATED IN JAPAN Jul 2003 SD 4900 ...
Page 69: ......
Page 72: ...3 33 3 34 3 RF SERVO CIRCUIT DIAGRAM CD DVD LD will not on 02 12 26 R14601A TOSHIBA ...
Page 77: ...3 43 3 44 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE 5600AD ...
Page 78: ...3 45 3 46 2 KEY P C BOARD 3 TIMER P C BOARD LOCATION GUIDE Solder Side Solder Side ...
Page 85: ......
Page 87: ......
Page 102: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN ...