Chapter 8
RA83/84/85/93/94/95 Series
Trouble Shooting And On Board Servicing Operation
Manual
8. Others
Y
Main Logic PCB is faulty.
N
Y
0 V
46.9us
The display synchronization
is unstable.
Are the following sync signals present at TP12 and TP13 in Main
Logic PCB.
5 V
[TP13]
0 V
5 V
16.66 ms
[TP12]
1.04
µ
s
15.6
µ
s
LCD monitor unit is faulty.
N
Main Logic PCB is faulty.
Is the RGB signal presented at
the J218 and J219 connector?
Texts and graphics displays are erratic.
Main Logic PC B is faulty.
9. Antenna unit
Y
Disconnect P6 (J6) from the
Modulator PCB. Is the fault
removed?
+12V line is shorted.
Y
N
Y
Disconnect P1 (J1) from the
Modulator PCB. Is the fault
removed?
N
Disconnect P5 (J5) from the
Modulator PCB. Is the fault
removed?
IF PCB is faulty.
N
Performance Monitor is faulty.
Internal wirings in the Antenna
unit or Processor unit is faulty.
Modulator PCB is faulty
8-12
93142105-02