Ricoh A212, Service Manual

Page: 17 / 92

Symbol Name Function Index No.
L3
Secondary Fusing Provides heat to both ends of the hot roller.
✽
Modified - see the "Fusing" section for
details.
60
L4
Pre-transfer Reduces the charge remaining on the
drum surface before transfer.
4
L5
Quenching Neutralizes any charge remaining on the
drum surface after cleaning.
5
L6
Erase After exposure, this eliminates the charge
on areas of the drum that will not be used
for the image.
2
Heaters
H1
Drum Turns on when the main switch is off to
keep the temperature around the drum
charge roller at a certain level. Also
prevents moisture from forming around the
drum.
33
H2
Optics Anti-condensation
(option) Turns on when the main switch is off to
prevent moisture from forming on the
optics.
40
H3
Lower Tray (option) Turns on when the main switch is off to
keep paper dry in the lower paper tray.
32
Thermistors
TH1
Main Fusing Monitors the temperature at the central
area of the hot roller.
63
TH2
Secondary Fusing Monitors the temperature at the ends of the
hot roller.
64
TH3
Optics Monitors the temperature of the optics
cavity.
41
TH4
Drum Charge Monitors the temperature of the drum
charge roller.
43
Thermofuses
TF1
Main Fusing Provides back-up overheat protection in
the fusing unit.
62
TF2
Secondary Fusing Provides back-up overheat protection in
the fusing unit.
61
TF3
Exposure Lamp Opens the exposure lamp circuit if the 1st
scanner overheats.
17
Counters
CO1
Total Keeps track of the total number of copies
made.
35
ELECTRICAL COMPONENT DESCRIPTIONS 13 October 1997
14