Ricoh FW830, Service Manual

Page: 15 / 227

Name Function Index. No.
Fusing Provides heat to the fusing unit. 53
Pre-Transfer
(PTL) Reduces the charge on the drum surface prior
to image transfer. 31
Power Packs
Charge/Bias/Grid
Power Pack Provides high voltage power for the charge
corona, charge grid, and development bias. 49
Transfer/
Separation Provides high voltage power for the transfer
corona and separation. 54
Thermistors
Hot Roller Monitors the hot roller’s surface temperature. 56
Pressure Roller Monitors the pressure roller’s surface
temperature.
58
Exposure Lamp Monitors the fluorescent lamp’s temperature. 44
Thermofuses
Fusing Protects against fusing overheat. (Two
thermofuses in parallel.) 59
Exposure Lamp Protects against exposure lamp overheat. 44
Heaters
Exposure Lamp Warms the scanning lamp. 44
Anticondensa-
tion Keeps moisture from forming inside the copier. 47
Others
Total Counter Keeps track of the total length of copies made. 66
Noise Filter Filters electrical noise on the ac power input
lines. 62
Transformer Steps down the line voltage to 100 Vac. 69
Development
Motor Capacitor Motor start capacitor. 2
Main Motor Ca-
pacitor Motor start capacitor. 3
Circuit Breaker Guards against voltage surges in the input
power. 61
ELECTRICAL COMPONENT DESCRIPTIONS 31 December 1992
1-12