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- CWX2389 LCD module troubleshooting
1
No images with the composite signal
No images with the
composite signal
NO
Back light turns ON?
YES
Circuit current flows normally?
Video signal is obtained at R654 (75 ohms)?
Video signal is obtained at Q653 (TR)?
Chroma signal is obtained at
Pin-9 of Q201 (NJW1300A)?
Y-signal is obtained at Pin-
24 of Q201 (NJW1300A)?
TE
L 13942296513
5V is obtained at Pin-23 and Pin-61 of Q201 (NJW1300A)?
7V is obtained at Pin-2 of Q201 (NJW1300A)?
POLC signal is obtained at Pin-46
of Q201 (NJW1300A)?
Sync pulses in synchronization with the input signal are
obtained at Pin-62 and Pin-63 of Q201 (NJW1300A)?
(-5)V is obtained at Pin-7
of Q201 (NJW1300A)?
Normal V-COM signal is obtained at TP13?
www
.
http://www.xiaoyu163.com
NO
Go to Item 2 Back light doesn't turn ON.
NO
Go to Item3 No power.
Check Delay line (Z601) and its periphery.
Check Delay line (Z603) and its periphery.
Check CN003 (30-pin flexible connector) and its periphery.
Go to Item3 No power.
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ao
u163
y
i
http://www.xiaoyu163.com
2 9
8
Check the input connecting flexible cables and its periphery.
Check Sync SW (Q651) and its periphery.
Q Q
3
6 7
1 3
1 5
Go to Item3 No power.
Go to Item4 Out of Sync
Check Q202, Q203 (Buffer), and their periphery.
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.
AVX-P7000CD,AVX-7000
9 4
2 8
0 5
8
2 9
9 4
2 8
m
9 9
9 9
13