Panasonic UF-5500, Service Manual

Page: 54 / 365

54
UF-5500 / 4500
6.12.1. Drum Detection
DRUM SENSOR is not arranged.
DRUM cartridge is detected when HVERR SENSOR arranged in H.V.P.S becomes effective.
6.12.2. Pickup Sensor
Paper SENSOR is not arranged.
Paper is detected when PICKUP SENSOR described as follows becomes effective.
This Switch detects whether a recording paper is picked up or not, and whether Rear Cover is opened or closed.
When there is a recording paper at the position of the switch, the input signal of IC300-AE20pin becomes low level.
When there is no recording paper at the position of the switch, the input signal of IC300-AE20pin becomes high level.
High Voltage ERROR Status Drum sensor Signal (IC300-P26)
Abnormal DRUM can not be detected Low level
Normal DRUM can be detected High level
Pickup status Idling status Signal (IC300-AE20pin)
A paper exists Rear Cover opened Low level
No papers Rear Cover closed High level
IC300
R520
P26
Main Board
CN1
H.V.P.S
C511
2
2
+3.3V
R519
[HVERR Sensor]
High Voltage
ERROR DETECT
CN505
IC300
CN508
R580
AE20
Main Board
CN51
Pickup & FAN2 Board
C563
SW50
7
2
+3.3V
R578
CN64
Toner Board
7
2
CN67