Oki B4100 - Manual (Page 439)

40055101TH Rev.4 439 /
Figure A3.6.1 Block Diagram of PWU (power supply unit)
Filter
ACIN
SW1
Filter
Heater control circuit
F1
F2
+30V power supply circuit
+5V power supply circuit +/- 8V power supply circuit
0V
+5V
IOGA
+30V 0VP +5V 0V +8V -8V
CVONV-N
HEAT-N
+30V 0VP +5V 0V +8V -8V
HEATON
CVOPN-N
DBPWM DB1ENB/DB2ENB TR1PWM/TR2PWM CHPWM
TONER-N PAPER-N
PSIN1-N/PSIN2-N
WRSNS-N PSIN2-N THERM
TNRSNS-N
PAPER-N
PSIN1-N/PSIN2-N
WRSNS-N PSIN2-N THCHK
CN3
CN1
A15, B15 A16, B16 B11-B13, A13 A8-A10, B8, B9
A14 B14 B7 A7 A5 A4, B4
A11, B5, A6, B10
B6 A2 A1 B2 B1 B3 A12
M17
1VP(120V), 2VP(230V)
PC1
SW2
DS1
T1: see note
ACOUT(L) ACOUT(N)
SB DB CB TR CH
+5V
TH1 TH2
D10. D11. C13, C14 etc.
IC1, Q1, C10 etc.
D6, C7, R53 etc.
L101, R1
L1, C3, VR2
PC1, C4, D1, L2, R2, R3
Note: The T1 (transformer 1) is mounted on the base plate.
(Toner supply roller)
(Developing roller)
(Cleaning roller) (Transfer roller)
(Charging roller)
IC2
Driver Driver Driver Driver Driver
To IOGA
ISEN/VSEN