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31 December 1992
2. SERVICE TABLES
2.1 TEST POINTS
Main Board
NUMBER
TP101
TP102
TP103
TP104
TP105
TP106
TP107
TP108
2.2 VARIABLE RESISTORS
Main Board
NUMBER
VR101
VR102
VR103
VR104
VR105
Original registration sensor
Adjusts the voltage to +2.6 ± 0.1 volts by VR101
ID sensor (Vsg)
Adjusts the voltage to +4.0 ± 0.1 volts by VR104
Toner density sensor
Adjusts the voltage to +4.0 ± 0.1 volts by VR105
Auto image density sensor (ADS)
Adjusts the voltage to +3.0 ± 0.1 volts by VR103
Light sensor
Adjusts the voltage by VR102
GND
Vcc (+5 volts)
V
(+24 volts)
AA
Adjusts original registration sensor voltage
(+2.6 ± 0.1 volts)
Adjusts light sensor voltage
Adjusts ADS reference voltage (+3.0 ± 0.1 volts)
Adjusts Vsg (+4.0 ± 0.1 volts)
Adjusts toner density sensor voltage
(+4.0 ± 0.1 volts)
4-11
FUNCTION
FUNCTION
SERVICE TABLES
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