Pioneer PDP-5020FD Service Manual page 54

1
A
D
B
Another Assy may
be in failure.
C
D
E
F
54
1
2
B
X DRIVE Assy
No
Are all the connectors properly
connected?
Yes
Is the output value of each voltage
from the X DRIVE Assy appropriate?
Yes
Is the waveform normal when the
voltage is applied to the panel?
(See the oscilloscope photos.)
No
Is the input signal normal?
(See the oscilloscope photos.)
No
Replace the FFC cables.
NG
Replace the DIGITAL Assy.
C
ADDRESS Assy
No
Are all the connectors properly
connected?
Yes
No
Is the TCP control signal normal?
(See the oscilloscope photos.)
Yes
Replace the panel chassis.
PDP-5020FD
2
3
Reconnect the connectors.
No
• Compare the measurement value at the last output stage of each
voltage against the value calculated using the measurement value
of the DAC output voltage. (See the table below.)
• There may be a case where the setting of a Adjustable resistor on
the Assy is out of range.
Yes
Replace the X DRIVE Assy.
Reconnect the connectors.
Is the input signal normal?
(See the oscilloscope photos.)
Replace the FFC cables.
Replace the DIGITAL Assy.
3
4
No
Yes No
NG
* Waveform such as the
signal is OK for an
LVDS signal.
4