Setting the Developer Temperature
981088 – September 1995
59
[6] Check the voltage between TEST POINT TP30 and GROUND TP14 on the 100 CIRCUIT BOARD.
• A reading of 1.17 V DC provides a developer setpoint temperature of approximately 33.9
°
C (93.0
°
F).
• The higher the voltage reading across TEST POINTS TP14 and TP30, the higher the developer setpoint
temperature.
– Rotate POTENTIOMETER R25 clockwise
to increase the voltage across TEST POINTS TP14 and
TP30.
– Rotate POTENTIOMETER R25 counterclockwise
to decrease the voltage across TEST POINTS
TP14 and TP30.
Note
A 40 mV change between TP14 and TP30 equals a 0.1
°
F change in temperature.
Figure 51
Checking the Voltage Between TP30 and TP14
[7] After the READY LIGHT comes on, check the temperature reading on the calibrated THERMOMETER again.
(a) If necessary, adjust POTENTIOMETER R25 until you obtain a developer temperature reading of 33.9
°
C
(93.0
°
F).
[8] For the M43 and M43A PROCESSORS Only - if the temperature shown on the DEVELOPER
TEMPERATURE DISPLAY matches the temperature shown on the calibrated THERMOMETER, then the
DEVELOPER TEMPERATURE DISPLAY is calibrated correctly. If the temperature shown on the
DEVELOPER TEMPERATURE DISPLAY does not match the temperature shown on the THERMOMETER,
then you need to calibrate the DEVELOPER TEMPERATURE DISPLAY. See the calibration procedure in
the Service Manual, Publication No. 981090.
[9] Close the COVER on the ELECTRICAL BOX.
[10] Disconnect your ESD wrist strap.
[11] Slide the ELECTRICAL BOX and the SUPPORT SHELF into the PROCESSOR.
U4
U5
U6
U20
U26
P102
TP28
TP30
P107
P106
TP4
1
7
1
2
10
9
TP1
TP2
30
29
TP3
TP5
TP6
TP7
TP8
TP12
TP15
GND
TP36
21
P105
P104
21
21
87
16
15
TP22
TP23
TP25
TP41
TP26
R43
R31
R34
P103
TP32
20V RTN
1
3
C35
C46
TP9
TP10
TP11
TP27
TP14
TP40
P15V
VCC
P5AD
N15V
TP35
TP31
TP33
TP34
15
2
6
P101
C42
C44
U31
P108
S1
E5
E4
E1
E2
GND
N5AD
100 BD.
5
1
20V
R42
R25
H130_0146HA
N
C
F
F
13
OFF
ON
13
TP14
TEST POINT
H130_0146HCB
POTENTIOMETER
R25
TEST POINT TP30