TX-SR308/ /508/ 578/ 608 HT-R280/ 380/ 538/ 580/ 680/ 980/ C230/ C260 DTR-20.2/ 30.2
TROUBLE SHOOT- 2
No Display
A
1
2
3
4
5
B
C
D
E
F
G
H
FLD_CLK
FLD_SDD(DATA) FLD_CS
V:1V/cm
H:02Msec/cm
V:1V/cm
H:10µsec/cm
V:1V/cm
H:1µsec/cm
No Display
YES
YES
NO
NO
NO
NO
YES
YES
NO
YES
Timing of Serial Communication
This is just for general reference and does not include every single case.
The above waveforms are got by Oscilloscope of Maximum Horizontal Sensitivity: 100MHz.
The results depend on the oscilloscope.
Fluorescent Display Tube
is not working?
Replace Fluorescent
Display Tube or
BADIS-0373/0387(Display
Board).
BAPS-0342/0349/0356(-VP Board)
JL953 between 2pin-4pin: AC3.3V
BAPS-0342/0349/0356
(-VP Board)
JL951 1pin-2pin AC3.3V
BAPS-0342/0349/0356
(-VP Board)
R950(8.2 ) is disconnected?
BAPS-0342/0349/0356 (-VP Board)
Replace R950 (8.2 ) or -VP Board
Replace Power transformeror
Repair its peripheral circuit.
BAPS-0342/0349/0356
(-VP Board)
Replace -VP Board or
Check for signal line
damage etc. and fix any
damages.
BAPS-0342/0349/0356 (-VP Board)
JL953 3pin -33V
1pin and 5pin +3.3V
BAPS-0342/0349/0356(-VP Board)
JL951 3pin-4pin AC40V
BAPS-0342/0349/0356 (-VP Board)
Replace -VP Board or Repair
Q960/D960/D962/R961 and
their peripheral circuit.
BADIS-0373/ 0387
(Display Board)
P701
26pin FLD_SDD
27pin FLD_CLK
28pin FLD_CS
Transmission of each
of the signals is correct?
BADG-0413(MPU Board)
Replace
or Repair Q701 and
their peripheral circuit.
MPU Board.
Replace Display Board
or repair Q7003 and
their peripheral circuit.
1 byte data
address data
1 byte data
data to be
YES
BADIS-0373/ 0387
(Display Board)
NO
NO
YES
