Service manual

3.1 No Raster Generated
When the LED blinks in ORANGE
→
Check for “3.4.9 Self-Diagnostic Functions”.
The LED is lit in
ORANGE
Check the HS and VS lines.
Measure the voltage between Pins 6 (HS)
and 5 (VS) of CN103 on the MAIN PWB.
OK
NG
Horizontal period (HS)
Vertical period (VS)
Expected failure point
1
) CN103, CN212 on VIDEO PWB or FFC cable
2) IC216 on the VIDEO PWB, (HS) (VS) line, or
peripheral circuits
3) Signal cable
Check the 5.15V line (C971+ electrode on the POWER PWB).
No LED is lighting.
The LED is lit in GREEN.
Check the Pin 39 of IC102 in 5V line.
OK
NG
Expected failure point
IC102, IC105 on the MAIN PWB or peripheral circuits
OK
NG
Expected failure point
The
p
ower circuits
(
See Item 3.4.1
)
Expected failure point
CN9A1 on the MAIN PWB, cable or peripheral circuits
Expected failure point
IC102, IC100 or peripheral circuits
Check the AFC line.
OK
NG
Expected failure point
Horizontal oscillation/deflection circuits (See Item 3.4.2)
NG
Check Pin 10 of CN601 on the MAIN PWB and Pin 8 of IC701.
Expected failure point
The high-voltage circuits (See Item 3.4.4)
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This judgement should be based on the sound generated when the powe
r
switch is turned on or in terms of electrostatic char
g
es.
Check high-voltage operation.
Check the LED (Power-On Indicator).
OK
3-2