3N0/3NK/3PD/3PG
1-4-46
(9)
DF shift release
motor does not
operate.
1. Defective connector
cable or poor con-
tact in the connector.
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
DF shift release motor and DF main PWB (YC14)
2. Defective drive trans-
mission system.
Check if the rollers and gears rotate smoothly. If not,
grease the bushes and gears. Check for broken gears and
replace if any.
3. Defective motor.
Replace the DF shift release motor.
4. Defective PWB.
Replace the DF main PWB and check for correct operation.
(see page 1-5-2)
(10)
DF shift motor 1,2
does not operate.
1. Defective connector
cable or poor con-
tact in the connector.
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
DF shift motor 1,2 and DF main PWB (YC14)
2. Defective drive trans-
mission system.
Check if the rollers and gears rotate smoothly. If not,
grease the bushes and gears. Check for broken gears and
replace if any.
3. Defective motor.
Replace the DF shift motor 1,2.
4. Defective PWB.
Replace the BR PWB and check for correct operation. (see
page 1-5-2)
(11)
DF staple motor
does not operate.
1. Defective connector
cable or poor con-
tact in the connector.
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
DF staple motor and DF main PWB (YC17)
2. Defective drive trans-
mission system.
Check if the rollers and gears rotate smoothly. If not,
grease the bushes and gears. Check for broken gears and
replace if any.
3. Defective motor.
Replace the DF staple unit.(see page 1-5-5)
4. Defective PWB.
Replace the DF main PWB and check for correct operation.
(see page 1-5-2)
(12)
DF slide motor
does not operate.
1. Defective connector
cable or poor con-
tact in the connector.
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
DF slide motor and DF main PWB (YC12)
2. Defective drive trans-
mission system.
Check if the rollers and gears rotate smoothly. If not,
grease the bushes and gears. Check for broken gears and
replace if any.
3. Defective motor.
Replace the DF slide motor
4. Defective PWB.
Replace the DF main PWB and check for correct operation.
(see page 1-5-2)
(13)
DF feedshift sole-
noid 1,2,3 does not
operate.
1. Defective connector
cable or poor con-
tact in the connector.
Reinsert the connector. Also check for continuity within the
connector cable. If none, replace the cable.
DF feedshift solenoid 1,2,3 and DF main PWB (YC18)
2. Defective solenoid.
Replace the DF feedshift solenoid 1,2,3.
3. Defective PWB.
Replace the DF main PWB and check for correct operation
(see page 1-5-2).
Problem
Causes
Check procedures/corrective measures
Summary of Contents for AK 740
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Page 2: ...Service Manual RFXPHQW LQLVKHU D 07 3 LUVW GLWLRQ Date 2 0 20 3 SM06 ...
Page 4: ...Revision history Revision Date Pages Revised contents ...
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Page 17: ...3N0 3NK 3PD 3PG 1 1 4 2 Mail box option Figure 1 1 2 1 2 1 Trays 1 7 2 Mailbox cover ...
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Page 45: ...3N0 3NK 3PD 3PG 1 3 16 This page is intentionally left blank ...
Page 129: ...3N0 3NK 3PD 3PG 2 2 9 This page is intentionally left blank ...
Page 155: ...1 1 INSTALLATION GUIDE DF 791 3000 sheet finisher Installation Guide ...
Page 170: ...AK 740 Bridge unit Installation Guide ...
Page 172: ...MT 730 B Mail box Installation Guide ...