Olivetti d-Copia 1600 Service Manual Download

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2HA/2HB

1-4-26

1-4-4 Electric problems

Problem

Causes

Check procedures/corrective measures

(1)
The machine does
not operate when the
power switch is
turned on.

No electricity at the power
outlet.

Measure the input voltage.

The power cord is not
plugged in properly.

Check the contact between the power plug and the outlet.

The front cover or left cover
is not closed completely.

Check the front cover and left cover.

Broken power cord.

Check for continuity. If none, replace the cord.

Defective power switch.

Check for continuity across the contacts. If none, replace the
power switch.

Blown fuse in the power
source PWB.

Check for continuity. If none, remove the cause of blowing and
replace the fuse.

Defective front or left cover
safety switch.

Check for continuity across the contacts of each switch. If none,
replace the switch.

Defective power source
PWB.

With AC present, check for 24 V DC at YC1-1 and 5 V DC at YC1-
7 on the power source PWB. If none, replace the power source
PWB.

(2)
The drive motor, reg-
istration motor or exit
motor does not oper-
ate

Poor contact in the connec-
tor terminals.

Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.

Broken the gear.

Check visually and replace the gear if necessary.

Defective the motor.

Run maintenance item U030 and check if the motor operates
when the following terminals on the PWB goes low. If not, replace
the corresponding motor.
Drive motor: YC7-5 on the engine PWB
Registration motor: YC2-1,2,4,5 on the registration motor PWB
Exit motor: YC14-1,2,3,4 on the engine PWB

Defective engine PWB.

Run maintenance item U030 and check if following terminals on
the engine PWB goes low. If not, replace the engine PWB.
Drive motor: YC7-5 on the engine PWB
Registration motor: YC4-4 on the engine PWB
Exit motor: YC14-1,2,3,4 on the engine PWB

(3)
The scanner motor,
cooling fan motor 1
or 2 does not oper-
ate.

Broken the motor coil.

Check for continuity across the coil. If none, replace the motor.

Poor contact in the connec-
tor terminals.

Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.

(4)
The paper feed
clutch or MP paper
feed clutch does not
operate.

Broken the clutch coil.

Check for continuity across the coil. If none, replace the clutch.

Poor contact in the connec-
tor terminals.

Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.

Defective engine PWB.

Run maintenance item U032 and check if following terminals on
the engine PWB goes low. If not, replace the engine PWB.
Paper feed clutch: YC8-3 on the engine PWB
MP paper feed clutch: YC8-5 on the engine PWB

(5)
The cleaning lamp
does not turn on.

Poor contact in the connec-
tor terminals.

Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.

Defective cleaning lamp.

Check for continuity. If none, replace the cleaning lamp.

Defective engine PWB.

If the cleaning lamp turns on when YC3-12,13 on the engine PWB
is held low, replace the engine PWB.