3-3
Replace Main B/D
Refer to Front Part
Replace IC503
Reconnect it.
2. µ-COM Circuit
A. No Power
Does Logo appear
on the screen?
Is oscillation of
X501 normal?
Are IC501 Pins 193, 80
8
and 81 normal?
Do “Hello” appear at FLD?
Is P3901
connected normally?
Is P3901 Pin 7, 8, 9 normal?
The waveform
on 3, 5, 7 pin of IC503
normal?
Check the oscillation
Check short.
OK
Replace IC501
or IC3F1.
Check power.
(Refer to power)
If power is
normal
OK
POWER ON
1
1
YES
YES
YES
NO
YES
YES
YES
A
NO
NO
NO
NO
NO
NO
NO
YES
A
Summary of Contents for SD-2815
Page 87: ......
Page 95: ...3 31 3 32 7 A V CIRCUIT DIAGRAM ...
Page 96: ...3 33 3 34 8 JACK CIRCUIT DIAGRAM ...
Page 99: ...3 39 3 40 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP VIEW LOCATION GUIDE ...
Page 100: ...3 41 3 42 2 MAIN P C BOARD BOTTOM VIEW LOCATION GUIDE ...
Page 121: ...4 20 ...
Page 141: ...4 40 ...
Page 161: ...4 60 ...
Page 179: ...4 78 ...
Page 180: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN ...