SERVICE MANUAL (BSV-4251 BSV-4251A )
MODEL NAME
DOCUMENT NO
REVISION NO
REVISION DATE
PAGE
- It’s out of order a panel
PC attached panel
ed panel
(2) It may cause followings.
- Open or short of SCAN F
- It’s out of order a SCAN IC attach
(3) Replace Y DRV B/D
2-10. The screen displays input signal pattern but the brightness is dar
(2) Check the power cord of Z B/D.
B/D.
/D.
-1
r partially on full white screen or happens
discharge partially on full black screen.
(1)
e.
(2) Check the declination of Z B/D
¢«
ramp wave.
200MHz) and compare the data with below
:F/G[
¥
s/
¥
s]) declination by changing VR1/VR2/VR3.
-
k
(1) In this case, Z B/D operation isn’t complete.
(3) Check the connector of Z B/D and Controller
(4) Replace the Controller B/D or Z B
2 1. The screen displays other colo
Check the declination of Y B/D set up, set down wav
(3) Measure each output wave with oscilloscope(more than
figure data.
Adjust the Y B/D set up(Test-up:B/C[
¥
s/
¥
s])/setdown(Testdown: D[
¥
s]) and Z B/D
ramp(Tramp
- Measuring Point of Y B/D : P4 (Connector P4 36 pin)
Measuring Point of Z B/D : B37 (SUS_OUT)
. A center of screen is darker than a edge of screen at full white pattern.
(2) Check the connection cable of Z B/D and CTRL B/D.
2-12
(1) In this case, it’s a problem about Z B/D ramp wave.
BSV-4251/4251A RD(1)
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03/10/23
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