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Only for training and service purposes
TROUBLESHOOTING
1. No video (Main IC Block)
Check Audio (Speaker out)
Audio OK
Next page (Back-end block)
Audio NG
Check stand-by voltage 3.5V
P401/P402 5,7,8 pin
NG
Check Power connector
(24pin/28pin)
NG
Short check
stand-by voltage 3.5V
NG
Replace Power board.
Check stand-by voltage 3.5V
L400,L401,ZD400,C400,C407
NG
Replace
L400,L401,ZD400,C400,C407
OK
Check X-TAL X101
NG
Replace X101
OK
Check POWER ON signal
P401/P402 1 pin
Low
Download software (Main)
NG
Replace IC101
or Main Board
Check multi voltage 12V, 24V
P401/P402 11,12,13,14,15p : 12V
P401/P402 18,19,20,21p : 24V
NG
Check Power connector
(24pin/28pin)
NG
Short check
multi voltage 12V, 24V
NG
Replace Power board.
OK
High
Check Main IC power block
IC404 : 1.5V , Q406 : 3.3V
IC403 : 1.1V
Replace IC404, Q406, IC403
OK
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