Xerox 3050 Service Manual page 280

11.42 Thermal Control RAP
A B
(61
1
192)
I
Replace the Thermal Controller PWB
This
RAP
is used to locate certain problems in
(A23A1).
the therinal control circuitry in the Fuser
~ e p l a c e t ~ e ~ o n t r o ~ l e r
pWB(A3).
area.
NOTE: The component locator drawings and
the circuit diagram are on the following
pages.
Initial Actions
Switch off, then switch on the copier.
If
the
problem still
exists, perform the
procedure below.
Procedure
Switch off the copier, and disconnect the
Power Cord. Disconnect the wire to the G
lead on Trlac 01. Connect the Power Cord
and switch on the copier. Wait 10 seconds.
After
5 seconds,
the
Fuser Heat Rod i s off.
I
Replace Triac
(91).
switch off the copier. Disconnect
A23AlP1.
Set
the DMM to read 100 ohms. Connect
the
(
+
)
lead to A23A1J1-2. Connect the
(-)
lead
toA23AlJ1-1.
The resistance is greater than I00 ohms.
LL.42 Thermal Control Fault RAP