Ricoh A151 Field Service Manual page 39

Lamps
SYMBOL NAME
L1 Exposure Lamp
L2 Fusing Lamp
L3 Quenching Lamp
L4 Erase Lamp
Power Packs
SYMBOL NAME
Power Pack
P1
–CC/Grid/Bias
Power Pack
P2
–TC/SC
Counter
SYMBOL NAME
CO1 Total Counter
Others
SYMBOL NAME
Fusing
TH1
Thermistor
Optics
TH2
Thermistor
Fusing
TS
Thermoswitch
Optics
TF
Thermofuse
Main Motor
C
Capacitor
TR Fusing Triac
FSM
FUNCTION
Applies high intensity light to the original for
exposure.
Provides heat to the hot roller.
Neutralizes any charge remaining on the drum
surface after cleaning.
Discharge the drum outside of the image area.
Provides leading/trailing edge erase and side
erase.
FUNCTION
Provides high voltage for the charge corona, grid,
and development roller.
Provides high voltage for the transfer and
separation corona.
FUNCTION
Keeps track of the total number of copies made.
FUNCTION
Monitors the fusing temperature.
Monitors the optics temperature.
Provides back-up overheat protection in the fusing
unit.
Provides back-up overheat protection around the
exposure lamp.
Start capacitor.
Switches the fusing lamp on and off. (115 V only)
Note: In the 220V-230V/240V version, the triac
is built-in the ac drive board
2-5
INDEX
NO.
21
12
11
9
INDEX
NO.
26
7
INDEX
NO.
10
INDEX
NO.
20
24
15
18
32
28
A151/A152