Panasonic KX-MB1900UCB / KX-MB2020UCB (serv.man2) Service Manual ▷ View online
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KX-MB1900UCB/KX-MB2020UCB
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KX-MB1900UCB/KX-MB2020UCB
6.12. Sensors and Switches Section
All of the sensor and switches are shown below.
Note:
See TEST FUNCTIONS - SENSOR CHECK SECTION for the sensor test.
(#815 of Service Mode test. Refer to Test Functions (P.88).
Sensor Name
Sensor Location
Reference number
Message Error
Pickup sensor
Pickup & Fan2 PCB
SW50
[PAPER JAMMED] [CHECK REAR CVR]
[WRONG PAPER & PRESS START]
[WRONG PAPER & PRESS START]
Exit sensor
Fuser PCB
PS50
[PAPER JAMMED]
Home sensor
CIS Home PCB
PS55
[SCANNER POSITION ERROR]
Registration & Manual paper sen-
sor
sor
Registration & PTOP
PCB
PCB
PS51
[PAPER JAMMED]
Print timing sensor
Registration & PTOP
PCB
PCB
PS52
[PAPER JAMMED]
Top cover sensor
H.V.P.S
SW1
[TOP COVER OPEN]
Toner sensor
TONER PCB
IC51
[TONER EMPTY]
[TONER LOW]
[CHECK DRUM]
[TONER LOW]
[CHECK DRUM]
Handset hook switch (KX-MB2020
ONLY)
ONLY)
Handset PCB
SW940
-
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KX-MB1900UCB/KX-MB2020UCB
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.
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.
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
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KX-MB1900UCB/KX-MB2020UCB
6.12.3. Exit Sensor
This sensor detects whether the recording paper exits or not.
When there is a recording paper at the position of the sensor, the input signal of IC300-AD20pin becomes low level.
When there is no recording paper at the position of the sensor, the input signal of IC300-AD20pin becomes high level.
When there is a recording paper at the position of the sensor, the input signal of IC300-AD20pin becomes low level.
When there is no recording paper at the position of the sensor, the input signal of IC300-AD20pin becomes high level.
6.12.4. Home Sensor
This sensor detects whether the carriage is at its home position or not.
When the carriage is at its home position, a shelter plate closes the sensor light.
So the photo-transistor turns off and the input signal of IC300-V23pin becomes high level.
When the carriage is not at its home position, a shelter plate lets the sensor light pass.
So the photo-transistor turns on and the input signal of IC300-V23pin becomes low level.
When the carriage is at its home position, a shelter plate closes the sensor light.
So the photo-transistor turns off and the input signal of IC300-V23pin becomes high level.
When the carriage is not at its home position, a shelter plate lets the sensor light pass.
So the photo-transistor turns on and the input signal of IC300-V23pin becomes low level.
Signal (IC300-AD20pin)
A paper exists
Low level
No papers
High level
Photo-transistor
Signal (IC300-V23pin)
A carriage is at home
OFF
High level
A carriage is not at home
ON
Low level
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