Service manual

Bulletin #R56/7A continued
2-WAY AES CIRCUIT BOARDS
RM2602 AND
RM2802
Check the old circuit board before installing a
new one.
If damages as shown below are found,
the defects causing the circuit board breakdown
must be corrected before the new one is Installed.
The following paragraph numbers relate to the
corresponding numbered items highlighted at the
circuit board.
/’
2 4.
-1
-1
-2
If this area is burned, the lead between
the
circuit board and the control
circuit board must be checked for
short circuits.
If soldering at board rear is burned,
the interior light lead is likely to be
shorted to ground.
If
X5A, X5B, X5C, and/or K1 are burned
(either side of the board),
the AC
voltage has been too high (over
l2OV
AC +- 10%). Also check the heater in
this case.
If V12 is burned, the solenoid leads can
be reversed.
A-ll-5