MDC-3560P/3510P Series
Chapter 8
TROUBLE SHOOTING AND ON BOARD SERVICING
93142002-01
8-13
8. Others
9. Antenna unit
Y
Y
IF PCB is faulty
N
N
N
Modulator PCB is faulty
Y
Y
Main Logic PCB is faulty
N
N
CRT monitor unit is faulty
Main Logic PC B is faulty
Are the following sync signals present at J708-8 and 9 in Main
Logic PCB.
Finished
Y
The display synchronization
is unstable.
Is the fault corrected?
In the CRT Drive PCB, reset the H-HOLD
(VR302) for horizontal sync or V-HOLD (VR202)
for vertical sync to make the display stable.
+12V line is shorted.
Disconnect P6(J6) from the
Modulator PCB. Is the fault
removed?
Disconnect P5(J5) from the
Modulator PCB. Is the fault
removed?
Disconnect P1(J1) from the
Modulator PCB. Is the fault
removed?
Performance Monitor is faulty
Internal wirings in the
Antenna unit or Display unit
is faulty
Texts and graphics displays are erratic.
32.9
µ
s
4.8
µ
s
[J708-8]
[J708-9]
18.29 ms
0.13 ms
5 V
0 V
5 V
0 V