3-3
Replace IC506.
Refer to Front Part
Check short
Reconnect it.
2. µ-COM Circuit
A. No Power
Does Logo appear
on the screen?
Is oscillation of
X501 normal?
Are IC503 Pins 14, 28
8
and 29 normal?
Does no DISC appear?
Does Hello
appear at FLD?
Is P5901
connected normally?
Is P5901 Pin 23 normal?
The
waveform on A[00:21]
and D[00:15] of IC501
normal?
Are IC506 Pins 7, 8 normal?
Replace Main B/D.
Check the oscillation
Check short.
OK
Replace IC501
or IC503.
Check power.
(Refer to power)
If power is
normal
OK
POWER ON
1
1
YES
YES
YES
YES
YES
YES
YES
YES
A
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
A
Summary of Contents for T531AH
Page 39: ...3 37 3 38 9 JACK CIRCUIT DIAGRAM S VIDEO C AUDIO L AUDIO R OPTICAL COMP VIDEO S VIDEO Y NAD ...
Page 44: ...3 47 3 48 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE Solder Side ...
Page 45: ...3 49 3 50 2 Power A V Front P C BOARD LOCATION GUIDE ...
Page 46: ...3 51 3 KEY P C BOARD 4 Power LED P C BOARD Solder Side Solder Side ...
