Ricoh FT 4015 - TEST POINTS (Main Control Board); VARIABLE RESISTORS

4. SERVICE TABLES
4.1 TEST POINTS (Main Control Board)
Number Label Monitored Signal
TP101 (HET) Fusing thermistor output
TP102 (ADS) Auto image density sensor output
TP103 (ETH) Optics thermistor output
TP104 (T. CON) Toner density sensor target control voltage output
TP105 (TV) Toner density sensor output
4.2 VARIABLE RESISTORS
Number Location Function
VR101 Main Control Board Changes the ADS voltage
(2.5
±
0.1 V)
VR1(VRC) High Voltage Supply Board - C/G/B/T/S Changes the charge corona voltage
VR51(VRT) High Voltage Supply Board - C/G/B/T/S Changes the transfer corona
voltage
VR152(VRB) High Voltage Supply Board - C/G/B/T/S Changes the standard
development bias (base bias
voltage)
VR21(VRG) High Voltage Supply Board - C/G/B/T/S Changes the charge grid voltage
VR101(VRD) High Voltage Supply Board - C/G/B/T/S Changes the discharge plate
voltage
Service
Tables
20 December 1996 SERVICE TABLES
4-27