Pioneer KRP-500P - Page 49

49
KRP-500P
5
6 7 8
5
6 7 8
A
B
C
D
E
F
No
Y DRIVE Assy
Is the waveform normal when the
voltage is applied to the panel?
(See the oscilloscope photos.)
Are all the connectors properly
connected?
Reconnect the connectors.
No
To "8.4. Adjustment when the Service
Panel Assy is Replaced"
No
Set the VH voltage correctly.
X DRIVE Assy
Y DRIVE Assy / SCAN Assy
ADDRESS Assy
Is the adjustment value of each
voltage within the appropriate range?
Abnormality across the whole
screen such as luminescent spots.
B
D
C
Ye s
Ye s
No
Is the VH set voltage (140 V)
correctly set?
Ye s
Is the output value of each voltage
from the Y DRIVE Assy appropriate?
Another Assy may
be in failure.
No
Replace the FFC cables.
Replace the DIGITAL Assy.
Replace the Y DRIVE Assy.
Replace the SCAN IC.
NG
Ye s
Ye s
Ye s
No
Is the input signal normal?
(See the oscilloscope photos.)
No
Is the waveform of the control
signal from the SCAN Assy normal?
(See the oscilloscope photos.)
Failure analysis for the
drive system => DR2
Because it is difficult to identify which drive is in failure, follow the flowchart below to check each Assy.
* Using ADJ1 on the Panel Factory menu or the QAJ
command, check if the adjustment value is within the
range described in the table below.
When go forward to the section "8.4 Adjustment when the service panel Assy
is replaced" from this step, please be careful to the following items.
• Do not clear hour meter and pulse meter.
(for readjustment in the panel non-replacement)
• Input a setting value of label mention example as preparations.
(because a product panel does not have a label)
• 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.