MDC-5000 Series
Chapter 5 Troubleshooting and on board repair
0092653004-00
5-21
TP_PLUSE_W shape
Yes
No
RF module (RFM-100) failure
Control PCB failure
No manual tuning
Is J1-1 pin +24V of RF
module normal?
Failure of wiring in Antenna
unit, or failure of Processor
unit power
Is RF module Pin J1-8
voltage varied within 6 to
9 volt by manual
adjustment?
No
Yes
No transmission
Pulse length A(us) B(ms)
L2
1.4
1.5 to 1.6
Magnetron failure
Failure of wiring in
Antenna unit, or failure of
Processor unit power
Modulator PCB failure
Check connecting cable
between Processor unit
and Antenna unit.
Modulator PCB failure
Modulator PCB failure
Yes
No
Is 6.3 V applied to a
magnetron heater?
No
Yes
Is transmitter TXHV fuse
blown?
No
Yes
Is +250 V (J1-1) on
modulator PCB normal?
No
Yes
Is trigger signal
(TP_PLUSE_W) on
modulator PCB normal?
No
Yes
Is there any abnormal
sound from pulse
transformer?
A
B
5 V
0 V
Содержание MDC-5004
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Страница 151: ...0092653004 00 A 1 INTER CONNECTION DIAGRAM RB806 ...
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Страница 155: ...0092653004 00 A 5 INTER CONNECTION DIAGRAM MRM 110 MRO 110 ...
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