Ricoh FT7770 Service Manual page 47

30 April, '89
6. Power Packs
Bias (P-4)
Charge/PCC (P-2)
Cleaning Bias (P-6)
PQC (P-5)
PTC (P-3)
TC/SC (P-1)
PTL stabilizer (P-7)
7. Heaters
Anti-condensation (H-4)
Drum (H-1)
Lower Tray (H-3)
Upper Tray (H-2)
8. Lamps
Exposure (L-1)
Erase (L-4)
Fusing (1,100 W) (L-2) 96
Fusing (550 W) (L-3)
Quenching (L-5)
Pre-transfer (L-6)
Provides power for the development bias.
108
131 Provides power for the charge and pre-
cleaning coronas.
133 Provides power for the cleaning bias.
65 Provides power for the pre-quenching
corona.
32 Provides power for the pre-transfer
corona.
29 Provides power for transfer and separation
coronas.
Provides power for the pre-transfer
61
lamp.
102 Prevents moisture from forming on
the optics.
Warms the drum when it gets too cool.
62
72
Removes humidity from the paper in the
lower tray.
85 Removes humidity from the paper in the up-
per tray.
11 Exposes the original with high intensity
light.
15 Dissipates the surface charge of sections
that are outside the image area.
Provides heat to the hot roller.
the hot roller temperature at 185°C.
90 Provides heat to the hot roller during
warm-up.
19 Electrically neutralizes the drum surface
prior to charging.
137 Removes excessive positive charge
from the drum surface prior to the
transfer and separation processes.
1-30
Keeps