Konica Minolta SRX-101A Service Manual page 80

CHECKING CIRCUIT BOARDS, SENSORS AND ELECTRICAL LOADS
7-5. Dev. Temp. Correction
When a difference is noted between the Dev. temperature indicated by the 7seg.LED and actually
measured Dev. temperature, correct the difference according to the procedure detailed below.
(1) Adjust the VR for Dev. Temp. setup (VR2) located on the board to 34: on a scale.
(2) Turn on the [Power] breaker, and start operation.
· Drying heater temperature is indicated by the 7seg.LED.
(3) Press the [Repl.] SW.
· Dev. temperature is indicated by the 7seg.LED.
(4) Wait for 5 minutes after "READY" lamp lights, and place a thermometer in the Dev. tank to
measure the actual Dev. temperature.
(5) If there is a difference between the temperature indicated by the 7seg.LED and that actually
measured, rotate VR5 to adjust the value of 7seg.LED so that it shows the same as the
actual temperature.
· When the thermometer indicates higher than the reading of the 7seg.LED
· When the thermometer indicates lower than the reading of the 7seg.LED
(6) When the reading of the 7seg.LED becomes equal to and stable at the set temperature, check
the temperature reading of the thermometer placed in the Dev. tank.
· Adjustment should be made so that the difference in temperature becomes as small as
possible. (±0.2:)
If it does not fall within the allowance, make a fine adjustment of VR5.
Note
Changing the reading of 7seg.LED by rotating VR5 activates the temp. control circuit, and the reading
of 7seg.LED starts changing. Therefore, adjustment of VR5 should be quickly carried out.
Example of Correction)
· Set Temperature
· 7seg.LED Display
· Reading of Thermometer
(1) Wait for 5 minutes after "READY" lamp lights, rotate VR5 counterclockwise to adjust the
reading of 7seg.LED to 35.5.
(2) After the 7seg.LED is stabilized at about 34:, check the temperature of the thermometer in
the Dev. tank.
: 34:
: 34.0 (5 minutes after "READY" lamp has lit)
: 35.5:
7seg.LED
VR5
VR for Dev. Temp. correction
VR2
VR for Dev. Temp. setup
: turn VR5 counterclockwise.
: turn VR5 clockwise.
SERVICE MANUAL 75