JRC JMA-5212-4, Service Manual

Page: 124 / 172

6-8
TXRX(Reverse)
Description
In circumstances where the antenna is subjected to "external force due to strong wind (equivalent
to wind speed 51.5 m/s) that exceeds the capacity for driving the scanner, the scanner unit enters
the protection mode and does not drive the motor. If the motor is reversed by strong wind under
such circumstances, this error message is displayed. If transmission can be restarted normally
when the wind has died down, there is no failure. If transmission cannot be restarted, a scanner
driving system error is suspected. In this case, check the items below.
Location of cause
o
Procedure
CSC-656 in the
scanner unit
x
Check the scanner motor power line.
x
If it is faulty, replace the CSC-656.
CBD-2000/CBD-2001
in the scanner unit
x
Check the scanner motor power line.
x
If it is faulty, replace the CBD-2000/2001.
Motor in the scanner
unit
x
Check the motor cabling.
x
Replace the motor B101.
(The type of motor B101 varies depending on the scanner unit.)
TXRX(Heater)
Description
This message indicates that the magnetron heater power supply in the scanner unit is faulty.
The power circuit CBD-1682A, the T/R control circuit CMC-1205R, or the modulation circuit
CPA-264 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.
CBD-1682A in the
scanner unit
x
Check the insertion of connector J1003 on the power circuit
CBD-1682A.
Replace the CBD-1682A.
CMC-1205R in the
scanner unit
x
Check the insertion of P1111 and J1103 on the CMC-1205R.
x
Replace the CMC-1205R.
Cables in the scanner
unit
x
Check the cables in the scanner unit.
W003, W005, and W104