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3. NO RASTER (OSD IS NOT DISPLAYED) – MST9131B
NO RASTER
(OSD IS NOT DISPLAYED)
U201
POWER PIN 72,
82, 94(3.3V)
PIN 64, 85 (2.5V)?
YES
U501
PIN11, 12
OSCILLATE AS
12MHZ?
YES
U501
PIN41 IS 48KHz H-SYNC?
PIN42 IS 60Hz V-SYNC?
IS PULSE APPEARED
AT SIGNAL PINS?
AT MODE 12?
YES
TROUBLE IN CABLE
OR LCD MODULE
NO
NO
NO
- 17 -
CHECK U803
(2.5V REGULATOR),
CHECK U804
(3.3V REGULATOR)
1. CHECK PIN11, 12
SOLDERING CONDITION
2. CHECK X501
3. TROUBLE IN U501
CHECK CONNECTION LINE
FROM D-SUB TO U501
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