Toshiba SD-2715 - Setting Your Password; Changing or Clearing Password

3-3
Replace Main B/D
Refer to Front Part
Replace IC502
Reconnect it.
2. µ-COM Circuit
A. No Power
Does Logo appear
on the screen?
Is oscillation of
X501 normal?
Are IC501 Pins 193, 808
and 81 normal?
Do “DV 50” Bars appear?
Do “Hello” appear at FLD?
Is P3901
connected normally?
Is P3901 Pin 8, 9, 18 normal?
The waveform
on 3, 5, 7 pin of IC502
normal?
Check the oscillation
Check short.
OK
Replace IC501
or IC306.
Check power.
(Refer to power)
If power is
normal
OK
POWER ON
1
1
YES
YES
YES
YES
NO
YES
YES
YES
A
NO
NO
NO
NO
NO
NO
NONO
YES
A