Fuser (2515) Rap - Xerox 2510 Service Manual

F -'Fuser (251 5) RAP
This RAP is used if there is a problem with
Fuser overtemperature or fuser warmup.
Also, a constant L8 or L9 is displayed.
WARNING
The heat rod and tho fusor roll may bo hot.
Be careful when working in this area.
Initial Actions
Ensure that the Thermistor Pad i s
free of contamination.
8
W/ TAG 5, Check connectors P/J 2, 6,
9, 17, 37, 38, 39, 40, 43, and 44 for
damage and proper seating.
Ensure that the Thermistor Pad i s
contacting the fuser roll.
DANGERO\)S VOI. TACIE,
E
Procedure
CAUTION
WIO TAGS 2 , 7,0r 89: To prevent
damage to the drive gears; before
entering any diagnostic test which
requires the use o f the main drive
motor (A); always enter the codes (g)
fuser and
(1)
cooling fans first, and then
allow the copier to operate for at least
2 minutes. Then press code (A) to start
the main drive motor.
The ovcrlreat
LED
will
be l i t i f
the
fuser temperature i s more than 3904
(200oC). The o v e r t e m p e r a t u r e
thermostat w i l l open when the
temperature i s more than 5500 F
(290.C).
Enter the diagnostic codes
Ig
and J
I,
W/
TAGS 2,7, or 89 enter the code[Al
.
Wait 3
minutes.
The Fuser Heat Rod is on.
Y N
Open the transport latching cover and
observe the overheat
LED
through tlis
hole i n the frame.
The overheat
LED
i s off.
N
(An overheat condition exists i f the
overheat LED is lit.)
Switch off and unplug the copier.
Check the fuser triac for a short
circuit between MT1 and MT2. (This
could have caused the overheat relay
to open.) Replace the triac i f there i s
a short circuit.
If there
i s
no short circuit, go to FLAG
4 and check the wiring for a short
circuit to frame. I f the problem
persists replace the Thermistor
Assembly PWB (A10).
Switch o f f and unplug the copier,
Measure the resistance between P2-1 of
the LVPS and terminal 3 of the Line Filter.
There is less than 5 ohms between the
pins.
.
Check the Fuser Heat Rod for an
open circuit. If there i s no open
circuit go to FLAG
4
and check the
wiring for an open circuit. If the
Fuser Heat Rod still does not turn on,
check the Over Temperature
Thermostat (A9) for an open circuit.
The Over Temperature Thermostat
(A9)
i s open.
Y
N
A B C D
A B C D
Go to FLAGS 1 and 3 and check
the wiring for an open circuit. If
no open circuit is found, replace
the Fuser Triac. If the problem
persists, replace the LVPS PWB
(PSI), I f
tho problotn persisls,
replace the Controller
PWB (A3).
Replace the Over Temperature
Thermostat A9
.
Disconnect
P/J 44
and check
R
f l
1 or a cold resistance
of between lOOK and l5OK ohms. If
not i n Specification re lace the
Thermistor assembly
PWB
t b ~
9.3). 11
resistance i s OK o t o FLAG 2 and
?
check the wiring ,or an open circuit.
If no open circuit
IS
found, check the
follow~ng:
If the fans are not turning, go to
the 1.3 Cooling Fan RAP.
Remove the xerographic mo$ule
and check the air flow man~fold
i n order to ensure that i t
IS
not
distorted or cracked,
Remove the right side cover. Switch
on the copier and press start. Within
60 seconds after ready, the fuser
heat rod should begin to
cycle. If
not, turn off immediately and
replace the Fuser Triac. If the
problem persists, replace the
LVPS
PWB (A2). If the problem persists,
replace the Controller PWB (A3).
Go to FLAGS
1
and 3 and check the
wiring for a short circuit. If no short
circuit
is
found, replace the Fuser Triac. If
the problem persists, replace the
LVPS
P W B
(PSI). If the roblem persists,
F
replace the Corllroller WU (A3).
Disconriecl
P/J 44
and check
R'fl
for n cold
resistance of between lOOK and 150K ohms.
If not in Specification replace the Thermistor
assembly
PWB (PL 9.3).
If resistance
is OK
go
to FLAG 2 and check the wiring for an open
circuit. If no open circuit i s found, replace
the Contoller PWB,
6/93
F
-
Fuser (251 5) RAP
2.22 251 5