PDP-507CMX
92
1
2
3
4
1
2
3
4
C
D
F
A
B
E
No
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
Please replace the connector wire.
No
Troubleshooting of the M+7V output abnormal operation.
Check of M+7V power supply line
Can you hear the power relay
operation sound?
No
Yes
Yes
In this case, the M+7V DD Assy
part is normally operating.
Check the MAIN Assy.
Yes
In this case, the M+7V DD Assy
part is normally operating.
Check the MAIN Assy.
Is the STB3.3V input of CN304 (pins 5-7) normally 3.3V ?
Please check the voltage.
Is the M+7V output of CN305 pin1
normally about 7V?
Please check the voltage.
Please check the loose contact
about CN304 connector wire.
Is this contact OK?
In this case,
It's possibblity of the AC-DC P.S.
unit out of order.
Please replace of the unit.
Please check the FU301 protector
opened. Is this protector opened?
Check the Q301 FET drain
terminal (pin 5-8) waveform.
Can you see the same waveform?
Waveform 55
Please replace these capacitor.
No
In this case, IC301 is broken.
Please replace of this IC.
No
Please check the C302
erectrolytic capacitor and D302
TVS. shorten.
Are these parts OK?
No
After remove the CN305
connector wire, Please check the
M+7V output line is shorten or not
by using the D.M.M.
Is this line shorten?
Please replace the connector wire.
Is this connector wire contact OK?
No
No
Check the Q301 FET gate
terminal (pin4) waveform.
(3.3V rectangular pulse)
Can you see the waveform?
Please replace Q301 FET, IC301
and D301.
In this case, any of IC301 (M+7V
power supply control IC) or Q301
or D301 is fault.
In this case, Q301 FET is broken.
Please replace Q301 and FU301.
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 ...