Service manual

OTHER KINDS OF CONTROL
2-P-3
2 UNIT EXPLANATION
[3] Cooling Fan Control
1. Operation
A 24V DC motor is used for each cooling fan.
a. FM1
(1) ON timing
Held ON during copy operation.
(2) OFF timing
Turned OFF at specified time after copying com-
plete.
b. FM3, FM4, and FM6
(1) ON timing
• Turned ON after completion of the first warm-
up after power-ON.
• During warm-up, turned ON when the drum
starts rotating.
• During idling, rotates at high speed when the
drum temperature exceeds specified temper-
ature.
• Always rotates at high speed during copying,
switching to low speed rotation at specified
time after copy completes.
(2) OFF timing
• During warm-up, turned OFF when the drum
stops rotating.
• After completion of warm-up, held ON until the
power is turned OFF.
c. FM5, FM8
(1) ON timing
Turned ON after power-on.
• Always rotates at low speed during idling.
• During copying, always rotates at high speed.
(2) OFF timing
Not turned OFF until the power is turned OFF.
d. FM7
(1) ON timing
Turned ON when L1 has been lit for at least 80
seconds.
(2) OFF timing
Turned OFF when L1 is turned OFF.
e. FM9
(1) ON timing
Turned ON in sync with M17 (polygon).
(2) OFF timing
Turned OFF in sync with M17).
f. FM10, FM11
(1) ON timing
Turned ON in sync with M8 (ADU conveyance).
(2) OFF timing
Turned OFF in sync with M8.
g. FM12
(1) ON timing
Turned ON in sync with M1 (main).
(2) OFF timing
Turned OFF in sync with M1.
PRCB
ADUSDB
SCDB
DCPS2
ACDB
FM7
FM1
FM7 DRIVE FM7 EM PGND
24VDC
PGND
FM7 EM
FM7 CONT
FM1 DRIVE
FM1 EM
PGND
FM10 FM11
FM10 DRIVE
FM10 EM
PGND
FM11 DRIVE
FM10 EM
PGND
FM3
FM3 H/L
FM3 EM
FM3 DRIVE PGND
FM4
FM4 H/L
FM4 EM
FM4 DRIVE PGND
FM6
FM6 H/L
FM6 EM
FM6 DRIVE PGND
FM12
FM12 H/L
FM12 EM
FM12 DRIVE PGND
FM5
FM5/FM8 H/L
FM5 EM
FM5/FM8 DRIVE PGND
FM8
FM8 EM
FM9
FM9 EM
FM3 CONT FM4 CONT FM6 CONT
FM9 DRIVE PGND FM3/FM4 FEM FM6 FEM FM5 FEM FM9 FEM
FM12 CONT
FM5 CONT FM9 CONT
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