PDP-507CMX
91
5
6
7
8
5
6
7
8
C
D
F
A
B
E
No
Yes
Yes
Yes
Yes
Yes
Please replace the connector wire.
No
No
No
Please replace the connector wire.
No
No
No
Flowchart of Failure Analysis for The DD Assy
Note:
When you confirm the operation of the power supply supplied to MAIN ASSY and AUDIO ASSY, please follow the below procedure.
As to the relation between the state of the set and the voltage of each part, please refer to "4.17 CONNECTION PIN DESCRIPTION".
Troubleshooting of the S+12V output abnormal operation
Check of S+12V power supply line
Please replace these capacitors.
No
No
Refer to "Flowchart of Failure
Analysis for the AUDIO Assy".
Is the normal voltage output after
CN309 is disconnected ?
Yes
In this case, it's possibility of the
AC-DC P. S. Unit out of order.
Please replace of the unit.
Yes
In this case, the S+12V P.S. is
normally operating.
Please check the AUDIO Assy,
speaker units, speaker cord and
audio signal source input.
Is the S+12V output of CN309
(pins 1-3) normally 12.0V?
Please check the voltage.
Please check the loose contact
about CN301 connector wire.
Is this contact OK?
Please replace IC305 or C326 or
C327 or C328 or C337.
In this case, S+12V power supply
control IC305 or any of C326,
C327, C328, C337 capacitors of
the VCC16.5V input line is broken.
Please check the FU302 protector
opened. Is this protector opened?
Please check the waveform of
IC305 pins11-14 (MD3222N)
control IC.
Can you see the same waveform?
Waveform 53
Is the VCC16.5V input of CN301 (pin 1) normally between 15.7V and
17.3V? Please check this voltage.
Check the S+12V output (CN309 pins 1-3).
Please check the loose contact
about CN309, connector wire.
Is this contact OK?
After remove the CN309 connctor
wire, Please check the S+12V
output line is shorten or not by
using the D.M.M.
Is this line shorten?
Yes
Please check the C334 and C335
electrolytic capacitor shorten.
Are these capacitor OK?
Please replace IC305 or D306 or
D307. In this case, any of S+12V
power supply control IC305 or
D306 or D307 or C334 is broken.
In this case, the S+12V P.S. is
normally operating.
Please check the AUDIO ASSY,
speaker units, speaker cord and
audio signal source input.
Yes
Summary of Contents for PDP 507CMX
Page 44: ...PDP 507CMX 44 1 2 3 4 1 2 3 4 C D F A B E 4 2 OVERALL CONNECTION DIAGRAM 2 2 ...
Page 45: ...PDP 507CMX 45 5 6 7 8 5 6 7 8 C D F A B E ...
Page 84: ...PDP 507CMX 84 1 2 3 4 1 2 3 4 C D F A B E 500ns div 500ns div 200ns div ...
Page 104: ...PDP 507CMX 104 1 2 3 4 1 2 3 4 C D F A B E ...