Panasonic FP-7718 User manual

Service Manual
ORDERNO.OED9609343C1
Plain Paper Copier
FP-7718/7722
FP-7728/7735
© 1996 Matsushita Electric Industrial Co., Ltd.
All rights reserved. Unauthorized copying and
distribution is a violation of law.
FP-7718/7722/7728/7735 Service Manual

This service information is designed for experienced repair technicians only and
is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of
potential dangers in attempting to service a product.
Productspoweredbyelectricityshouldbeservicedorrepairedonlybyexperienced
professionaltechnicians. Any attempt toservice or repairthe product orproducts
dealt with in this service information by anyone else could result in serious injury
or death.
For U.S.A
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC Rules. These limits are designed
toprovidereasonableprotection against harmful interferencewhentheequipment
is operated in a commercial environment. This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and used in accordance
with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be required to correct the
interference at his/her own expense.
Any unauthorized changes or modifications to this equipment would void the
users authority to operate this device.
This manual was developed and is supplied to authorized servicing dealers by
Panasonic Communications & System Co. for the sole purpose of providing
information necessary for the equipment's proper support. It is intended that this
informationbeconfidentialandmaynotbereproducedwithoutpriorwritten consent
from Panasonic Communications & Systems Co. Panasonic Communications &
SystemsCo.reserves the righttochangeany information enclosedhereinwithout
prior notification.
*WARNING

NOTE:
This supplement explains in detail the new functions introduced in the
FP-7718/7722/7728/7735. This manual dose not contain descriptions
of functions which are already described and unchanged in the FP-
7750/7742 service manual. For those items not covered in this supple-
ment, please refer to the FP-7750/42 Service Manual.

This service information is designed for experienced repair technicians only and
is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of
potential dangers in attempting to service a product.
Productspoweredbyelectricityshouldbeservicedorrepairedonlybyexperienced
professionaltechnicians. Any attempt toservice or repairthe product orproducts
dealt with in this service information by anyone else could result in serious injury
or death.
For U.S.A
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC Rules. These limits are designed
toprovidereasonableprotection against harmful interferencewhen theequipment
is operated in a commercial environment. This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and used in accordance
with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be required to correct the
interference at his/her own expense.
Any unauthorized changes or modifications to this equipment would void the
users authority to operate this device.
This manual was developed and is supplied to authorized servicing dealers by
Panasonic Communications & System Co. for the sole purpose of providing
information necessary for the equipment's proper support. It is intended that this
informationbeconfidentialandmaynotbereproducedwithoutpriorwritten consent
from Panasonic Communications & Systems Co. Panasonic Communications &
SystemsCo.reserves the righttochangeany information enclosedhereinwithout
prior notification.
*WARNING

NOTE:
This supplement explains in detail the new functions introduced in the
FP-7718/7722/7728/7735. This manual dose not contain descriptions
of functions which are already described and unchanged in the FP-
7750/7742 service manual. For those items not covered in this supple-
ment, please refer to the FP-7750/42 Service Manual.

Introduction
Supplement Unpacking/
Installation
Troubleshooting
PCB Connector and
Signal Information
Component
Location
Preventive
Maintenance
Contents / Index
I. Introduction
1.1 Specifications.................................................................................... 1-1
1.2 Features............................................................................................ 1-3
1.3 System Configuration ....................................................................... 1-4
1.4 Operation .......................................................................................... 1-5
1.5 Outer view......................................................................................... 1-8
II. Component Location
2.1 Inner View.......................................................................................... 2-1
2.2 Fan/Motor Location............................................................................ 2-2
2.3 Sensor Location................................................................................. 2-3
2.4 Solenoid/Clutch/Discharge Lamp Location ........................................ 2-4
2.5 PCB Location..................................................................................... 2-5
III. Preventive Maintenance
3.1 Maintenance Chart ............................................................................ 3-1
IV. PCB Connector and Signal Information
4.1 Main CPU PCB .................................................................................. 4-1
4.2 Control Panel PCB............................................................................. 4-3
4.3 Low Voltage Power Supply PCB ....................................................... 4-7
V. Troubleshooting
5.1 Service Mode..................................................................................... 5-1
(1) F4 mode Input/Output check ................................................... 5-1
(2) F5 mode copier function programming ................................. 5-10
(3) F6 mode adjustment and programming ................................ 5-12
(4) F7 mode electronic counter................................................... 5-14
(5) F8 mode copier operation adjustment................................... 5-16
(6) F9 mode Telephone number program .................................. 5-17
5.2 Self-diagnostics/Machine Malfunctions............................................ 5-18
(1) User error .............................................................................. 5-18
5.3 User Preset Mode............................................................................ 5-20
VI. Unpacking/Installation
6.1 Installation Requirements .................................................................. 6-1
6.2 Unpacking.......................................................................................... 6-1
6.3 Installation Procedure ........................................................................ 6-2
6.4 White Density Adjustment................................................................ 6-10

Supplement
1. Electrical Schematic Diagram
(1) Schematic Diagram
(2) Main CPU PCB
(3) Control Panel PCB
(4) Low Voltage Power Supply PCB
2. Description of circuit
(1) Paper feed unit
(2) Fuser temperature coutrol circuit
(3) Fuser abnormal detecting circuit
(4) Copy density sensor
(5) Waste toner bottle sensor
(6) Toner density sensor
(7) Hopper unit
(8) Recycle solenoid
(9) Automatic Duplex Unit

Caution:
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the manufacturer.
Dispose of used batteries according to the manufacture's instructions.

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1-1
Introduction
Section I
Introduction
1. 1 Specifications
1.Type Desk Top
2.Copy process Electrostatic photographic method
3.Development process Two component magnetic brush
4.Maximum original size Ledger(11"x17") / A3(297 x 420mm)
5.Copy speed FP-7718 FP-7722 FP-7728 FP-7735
Ledger/A3 : 10 cpm 11 cpm 17 cpm 18 cpm
Legal/B4,FLS : 11 cpm 12 cpm 19 cpm 21 cpm
Letter-R/A4R : 15 cpm 19 cpm 23 cpm 27 cpm
Letter/A4 : 18 cpm 22 cpm 28 cpm 35 cpm
Invoice/A5 : 18 cpm 22 cpm 28 cpm 35 cpm
6.First copy time [FP-7718] 4.8 sec.(Letter/A4 size/Without Auto mode)
6.2 sec.(Letter/A4 size/With Auto mode)
[FP-7722/7728/7735]
4.0 sec.(Letter/A4 size/Without Auto mode)
5.1 sec.(Letter/A4 size/With Auto mode)
7.Copy ratio Enlargement(fixed) : 2.00, 1.55, 1.29, 1.21
Reduction (fixed) : 0.79, 0.77, 0.65, 0.61, 0.50
Zoom : 50%-200% (1%step)
8.Copy size Ledger/A3–Invoice/A5
9.Paper capacity Cassette : 550 sheets
Multi-feed bypass : 50 sheets
10.Paper feed Front loading universal paper cassette
Multi-feed bypass tray
11.Paper exit tray capacity 250 sheets
12.Paper weight Cassette : 16–24 lbs ( 60–90g/m2)
Bypass : 15–30 lbs(55–130g/m2)
13.Special paper OHP,Label paper, Tracing paper
(Through multi-feed bypass)
14.Continuous copying 1-999 reset to 1 (1–99 reset to 1: FP-7718)

1-2
15.Fusing system Heat and Pressure
16.Photoreceptor Organic Photo Conductor(OPC)
17.Exposure control 7 step digital+Photo/Auto button
18.Warm up time Approximately 40sec.(FP-7718)
Approximately 50sec.(FP-7722)
Approximately 70sec.(FP-7728/7735)
19.Power consumption Less than 1.5 kW
20.Power source AC120V 60Hz / AC220 - 240V 50Hz
21.Dimensions(W)(D)(H) 23.9" ×26.0" ×22.9" / 606 ×661 ×582 mm
23.9" ×26.0" ×18.9" / 606 ×661 ×479 mm : FP-7718
22.Weight 159 lbs/71 kg (141 lbs/64 kg FP-7718)
23.Ambient conditions Temperature : 50–86F/10–30 °C
Relative humidity : 30–80%
* Specifications are subject to change without notice.

1-3
Introduction
1. 2 Features
• Introducing QuantumTM Technology copy density control
With QuantumTM Technology used for copy density control, optimum copies are
maintained for a long time in variable environmental conditions.
• Enhancements in serviceability
If trouble happens, the self diagnosis mechanism illustrates the area for easy
service.
• Functional expansion through optional accessories
Equipping with the system stand and LCC allows a high copy volume
*(maximumfeed paper capacity5800 sheets: fivedrawers + LCC+ multiple sheet
bypass).
ADF and sorter can be connected with the main system easily by using exterior
connectors.
* : FP-7718 maximum feed paper capacity 2250 sheets: 4 drawers + multiple
sheet bypass
* : FP-7722 maximum feed paper capacity 2800 sheets: 5 drawers + multiple
sheet bypass
• Environmental considerations
We remember the environment by reducing machine noise for quieter offices,
designing for lower power consumption, and the ETPTM System(-Evaluative Toner
Processing System), utilizing toner recycling and increased plastic recycleables.
(FP-7728/7735).

1-4
1. 3 System Configuration
System Console FA-DS72: Storage tray,Cover ×1
( 2 drawers drive mechanism )
Accessories FP-7718 FP-7722 FP-7728 FP-7735
FA-DS72 \\\\
LCC ( FA-MA301 ) ✕✕\\
Number of drawer 1222
Auto Duplex unit FA-MADM6 ✕Option Option Option
ADF FA-A505 \\\\
i-ADF FA-A888 ✕✕\\
10bin sorter FA-S280 \\\✕
10bin staple sorter FA-S615 \\\✕
20bin sorter FA-S575 ✕\\\
20bin staple sorter FA-S680 ✕\\\
Key: \ = OK ✕= N/A
ADF
System
console
Sorter
Copier
paper feed

1-5
Introduction
LEDGER
LEGAL
LETTER
INVOICE
1
1 2 3 4
2 3
4 5 6
7 8 9 0
1. 4 Operation
Control Panel
NO. Contents Function
1Energy Saver Key ●Press to select the energy saver mode while the copier
is not in use.
●Press Energy Saver key again, to cancel and make
copies.
2Interrupt Key ●Press Interrupt key, then indicator will light.
Make other copy job.
●Press interrupt key again to continue original job.
3Reset Key Press to reset all features to initial power-on state.
4Clear/Stop key Press to stop copy run or clear copy count in display.
Print Key
Recall Key
To recall the number
of copies selected
during a copy run.
Quantity Keys
Communications
Monitor
Copy Size Keys
Original Size Keys
Special Effects Panel

1-6
(1) Special Effects Panel
No. Keys
1Multi-Size Feeding
●Using i-ADF
2Original Count
(FP-7722/7728/7735)
●Using i-ADF and ADU 2 in 1
mode
3Access
4User Preset
5OHP interleaving mode
6Zoom
7Margin Shift Mode
No. Keys
8Edge Mode
9Book Mode
AT Memory In/Job programs
AK Duplexing mode selection
(FP-7722/7728/7735)
●Using ADU
AL 2:1 Copy
●Using i-ADF
AM 2-Page copy/2 in 1 mode selection
2
2
1
1
2
M
M1 M2
OHPOHP
OHPOHP
1 2 3
4
5
6
7
8
9
1011
12
13
321

1-7
Introduction
%
mm
FP-7718/22
FP-7728/35
LEDGER
LEGAL
LETTER
LETTER
INVOICE
FP-7718
STAPLE
SORT
STACK
STAPLE
SORT
STACK
1 12 3 4 5 6 7
13
14
15
16
9 81710111812
(2) Communications Monitor
No. Indicator
1Adding
Paper
Toner
Staple (FP-7718/7722)
Replacing
Waste Toner Bottle
2Reduction
3Enlargement
4Service Call
• Flashes for routine maintenance.
• Lights steadily for duplex
maintenance
5Paper Misfeed
6Copy Count Display
Indicates number of copies, zoom
ratio and error code.
No. Indicator
7Message Display
(FP-7728/7735)
Indicates procedures, functions
maintenance, etc.,
8Exposure Indicator
9Paper Size Indicator
AT Paper Drawer/Tray Indicator (–)
AK Paper misfeed location (•)
AL Mode Select Indicator
Staple Sort
Sort
Group
No. Keys
AM Manual Key
AN PHOTO/AUTO
AO Exposure Control (DARK)
No. Keys
AP Exposure Control (LIGHT)
AQ Paper Drawer/Tray
AR Mode Select Key
FP7718/7722
FP7728/7735

1-8
1. 5 Outer view
FP-7718
FP-7722/7728/7735
Sorter
Bypass
Control Panel
ADF i-ADF
System console LCC
Sorter

2-1
Component
Location
II. Component Location
2. 1 Inner View
12 3456
78910111213
1. Fuser area cover
2. Toner bottle
3. Drum unit
4. Developer unit
5. Toner hopper unit
6. Developer release lever
7. Waste toner bottle
8. Total counter
9. Manual paper feed knob
(Feed unit)
10. Paper transport handle
11. Transfer/Separation corona
12. Paper transport unit
13. Manual paper feed knob
(Fuser unit)

2-2
2. 2 Fan/Motor Location
Mirror stepping
motor
Optics drive
motor
Lens stepping
motor
Developer cooling
fan (except FP-7718)
Toner bottle
motor
Dust collecting fan
(except FP-7718/
7722)
Optics fan
Optics fan
Main motor
Optics fan
(except FP-7718)
Exhaust fan *1
Lifting motor *2
(Upper/lower
stages)
Suction/Ozone
fan
*1 2 Exhaust Fan for FP-7718/7722
*2 Upper stage only for FP-7718

2-3
Component
Location
2. 3 Sensor Location
Mirror home position
Exposure lamp
home position
Platen cover
open/close
Platen cover
angle
AE (Automatic original
density sensor)
Original size
Toner density
Copy density
Paper exit
Lens home
position
Front cover
open/close
Paper level *
(Upper/lower stage)
Registration
roller paper pass Paper detection *
(Upper/lower stage)
Waste toner
bottle
Total counter
Bypass paper
detection
Bypass paper size
Toner level
Toner bottle
home position
Paper feed cover
open/close
*Upper stage only for FP-7718
Bottom plate upper limit *
sensor (Upper/lower stage)
Middle roller paper pass *
(upper/lower stage)