JRC JMA-5212-4, Service Manual

Page: 125 / 172

6-9
TXRX(Video)
Description
This message indicates that the radar video signal from the scanner is faulty.
If TXRX(MHV) or TXRX(Heater) is displayed, handle the error first.
Since this message is displayed even when the transmitter is not operating, first check the
magnetron current on the test menu of the display system, and check if the transmission function
is normal.
If the transmission function is abnormal, the modulation circuit CPA-264, the power circuit
CBD-1682A, or the T/R control circuit CMC-1205R may be faulty.
If the transmission function is normal, the receiver NRG-162A/NRG-229 may be faulty.
Location of cause
o
Procedure
CPA-264 in the
scanner unit
x
Check the insertion of connectors J2102 and J2103 on the
modulation circuit CPA-264.
x
Replace the CPA-264.
CMC-1205R in the
scanner unit
x
Check the insertion of P1111 and J1103 on the CMC-1205R.
x
Replace the CMC-1205R.
CBD-1682A in the
scanner unit
x
Check the insertion of connector J1003 on the power circuit
CBD-1682A.
x
Replace the CBD-1682A.
NRG-162A or
NRG-229 in the
scanner unit
x
Check the insertion of the connector J101 on the receiver
NRG-162A or NRG-229.
x
Check the insertion of J1109 and J1110 on the CMC-1205R.
x
Replace the receiver NRG-162A or NRG-229.
Cables in the scanner
unit
x
Check the cables in the scanner unit.
W003, W005, W104, and W001
TXRX(Trigger)
Description
This message indicates that the trigger signal from the scanner is faulty.
The T/R control circuit CMC-1205R may be faulty.
Location of cause
o
Procedure
CMC-1205R in the
scanner unit
x
Replace the CMC-1205R.