Service Tables; Test Points; Variable Resistors - Ricoh FW780 Service Manual

2.

SERVICE TABLES

2.1

TEST POINTS

Main Board
Number
TP101 V (+24V)
AA
TP102 Vcc (+5V)
TP103 GND
TP104 Toner density sensor (CN104-A10)
TP105 Light sensor output (CN104-B1)
Charge/Bias/Grid Power Pack
Number
TP1 Development Bias Voltage
TP2 Grid Voltage
2.2

VARIABLE RESISTORS

Charge/Bias/Grid Power Pack
Number
VR1 Charge Corona Voltage
Caution: VR1 should not be changed in the field. Charge corona can be
adjusted using SP #--10.
T&S Power Pack
Number
VRT Transfer Corona Voltage
VRD (DC) Separation Corona Voltage (DC)
VRD (AC) Separation Corona Voltage (AC)
Caution: VRT, VRD (DC), and VRD (AC) should not be changed in the field.
They can be adjusted using SP #--12 to --17.
SM
Function
Function
Function
Function
4-7 A163