- 20 -
4. No Raster
(1) Symptom
¯
Does’t minute discharge at module.
¯
It maintains the condition where the front LED is green.
(2) Check following
Is the Power Board
normal?
Replace the
Power Board.
Is output the normality Low/High
voltage except Stand-by 5V?
Yes
No
No
Is the each connector
normal?
Replace the
connector.
Replace
Y-Board.
After connecting well each connector,
the normality it operates?
Yes
No
No
Is the
Ctrl Board normal?
Replace
X-Board.
Is the output voltage normal after
remove P1, 2, 4, 9, 10 connector of
Ctrl-B/D?
Yes
No
Yes
Is the Y-Board
normal?
Is the output voltage
normal after remove
P5, P6 connector of
Y-B/D?
Is the Fuse(FS2) normal on Y-B/D?
(In case of open is replace)
Yes
No
Yes
Yes
Replace
Z-Board.
Is the
Z- Board normal?
Is normal the output
voltage after remove
P1 connector of
Z-B/D?
Is the Fuse(FS1, FS2) normal on
Z-B/D? (In case of open is replace)
Yes
No
Yes
Is the
X- Board normal?
Is the output voltage normal after
remove P1, 2, 3, 4, 5 connector of
X-B/D?
After remove P1, P2, P3 output voltage
normality: Replace Right X-B/D
After remove P4, P5 output voltage
normality: Replace the Left X-B/D
Yes
No
Yes
Is the
VSC Board normal?
Is the output voltage normal after
remove P1001, P1100?
After crisis COF of each board, check the normality operates.
If in case normality operates, correspondence COF Fail is
replace the module.
After remove P1001, P1100 normal
operation: Replace the VSC Board
Yes
No
Is the COF of X, Y, Z
normal?
No
Yes
Yes
Summary of Contents for 42PX4RV/RVA
Page 24: ... 24 BLOCK DIAGRAM cable ...
Page 25: ...MEMO 25 ...
Page 33: ......
Page 34: ......
Page 35: ......
Page 36: ...PRINTED CIRCUIT BOARD MAIN TOP MAIN BOTTOM SIDE A V BOTTOM CONTROL TOP CONTROL BOTTOM ...
