Sharp FO-DC600 User manual

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FO-DC600U
No. 00ZFDC600USME
Parts marked with " " is important for maintaining the safety of the set. Be sure to replace these parts with specified ones for
maintaining the safety and performance of the set.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
SHARP CORPORATION
SERVICE MANUAL
Laser Wave Length : 770-795 nm
Laser Pulse Times : 51.3 ns
Laser Output Power : 5 mW
CAUTION
This laser printer is a class 1 laser product that complies with 21CFR 1040.10 and 1040.11 of the CDRH or IEC60825-1 standard. This
means that this machine does not produce a hazardous laser radiation. The use of controls, adjustments or performance of procedures
other than those specified herein may result in hazardous radiation exposure.
This laser radiation is not a danger to the skin, but when an exact focusing of the laser beam is achieved on the eyes retina, there is
danger of spot damage to the retina.
The following cautions must be observed to avoid exposure of the laser beam to your eyes at the time of servicing.
1) When a problem in the laser optical unit has occurred, the whole optical unit must be exchanged as a unit.
2) Do not look into the machine with the Main Switch turned on after removing the Toner/Developer unit and Drum Cartridge.
3) Do not look into the laser beam exposure slit of the Laser Optical Unit with the connector connected when removing and installing
the Optical Unit.
4) The cover of Laser Printer Unit contains the Safety Interlock Switch.
Do not defeat the safety interlock by inserting wedges or other items into the switch slot.
MODEL SELECTION CODE DESTINATION
FO-DC600 U U.S.A./Canada
OPTION
Toner cartridge: FO-50ND
Drum cartridge: FO-47DR
Option memory: FO-8MK
Verification stamp: FO-45VS
Paper cassette: FO-CS1
LAN Network interface kit: FO-LN1
Network printer kit: FO-NP1
Network scanner kit: FO-NS2
Dual line kit: FO-60DL
NOTE:
• FO-NP1 (Network Printer Kit) and FO-60DL (Dual Line Kit) can not
be mounted simultaneously.
• FO-LN1 (LAN Network Interface Kit) and FO-60DL (Dual Line Kit)
can be mounted simultaneously. However, multi-operation of
2 line communication and network scan is not possible.
FACSIMILE
FO-DC600
MODEL
Chapters 1, 2, 3, 7 and 8 of this manual are omitted because they are partly common to the FO-4400U/
FO-DC500U. Please refer to previous service manual (00ZFO4400USME) / (00ZFODC500SME) for these
chapters.

1 –2
FO-DC600U CONTENTS
• CAUTION FOR BATTERY REPLACEMENT
• PRECAUTIONS FOR USING LEAD-FREE SOLDER
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
[2] Life of consumable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
[3] Operation panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
[4] Refer to the service manual of FO-DC500U.
[5] Refer to the service manual of FO-DC500U.
[6] Refer to the service manual of FO-DC500U.
[7] Installing the Dual Line Kit (FO-60DL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
[8] Installing the Third Paper Cassette (FO-CS1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
CHAPTER 2. ADJUSTMENTS
[1] Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
[2] Diagnostics and service soft switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
[3] Refer to the service manual of FO-4400U.
[4] Refer to the service manual of FO-4400U.
[5] Refer to the service manual of FO-4400U.
[6] Refer to the service manual of FO-4400U.
CHAPTER 3. MECHANICAL DESCRIPTION
[1] Refer to the service manual of FO-DC500U.
[2] Refer to the service manual of FO-DC500U.
[3] Disassembly and assembly procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
[4] Refer to the service manual of FO-4400U.
CHAPTER 4. DIAGRAMS
[1] Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
[2] Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
[3] Point-to-point diagram and connector signal name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
CHAPTER 5. CIRCUIT DESCRIPTION
[1] Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
[2] Circuit description of control PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
[3] Circuit description of CIS unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
[4] Circuit description of LIU PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
[5] Circuit description of operation panel PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
[6] Circuit description of power supply PWB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19
[7] Circuit description of Dual Line Kit (FO-60DL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT
[1] Control PWB circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
[2] LIU PWB circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18
[3] Printer PWB circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21
[4] Power supply PWB circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25
[5] Operation panel PWB circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27
[6] LCD Relay PWB circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31
CHAPTER 7. OPERATION FLOWCHART
[1] Refer to the service manual of FO-4400U.
[2] Refer to the service manual of FO-4400U.
[3] Refer to the service manual of FO-4400U.
CHAPTER 8. OTHERS
[1] Service Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
[2] Refer to the service manual of FO-4400U.
PARTS GUIDE

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FO-DC600U
(Danish) ADVARSEL !
Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandoren.
(English) Caution !
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type
recommended by the equipment manufacturer.
Discard used batteries according to manufacturer’s instructions.
(Finnish) VAROITUS
Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan
tyyppiin. Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
(French) ATTENTION
Il y a danger d’explosion s’ il y a remplacement incorrect
de la batterie. Remplacer uniquement avec une batterie du
même type ou d’un type recommandé par le constructeur.
Mettre au rébut les batteries usagées conformément aux
instructions du fabricant.
(Swedish) VARNING
Explosionsfare vid felaktigt batteribyte.
Använd samma batterityp eller en ekvivalent
typ som rekommenderas av apparattillverkaren.
Kassera använt batteri enligt fabrikantens
instruktion.
(German) Achtung
Explosionsgefahr bei Verwendung inkorrekter Batterien.
Als Ersatzbatterien dürfen nur Batterien vom gleichen Typ oder
vom Hersteller empfohlene Batterien verwendet werden.
Entsorgung der gebrauchten Batterien nur nach den vom
Hersteller angegebenenAnweisungen.
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11
1 Employing lead-free solder
The Power supply PWB of this model employs lead-free solder. This is indicated by the “LF” symbol printed on the PWB
and in the service manual.
The suffix letter indicates the alloy type of the solder.
Example:
Indicates lead-free solder of tin, silver and copper.
22
22
2 Using lead-free solder
When repairing a PWB with the “LF” symbol, only lead-free solder should be used. (Using normal tin/lead alloy solder may
result in cold soldered joints and damage to printed patterns.)
As the melting point of lead-free solder is approximately 40ºC higher than tin/lead alloy solder, it is recommended that a
dedicated bit is used, and that the iron temperature is adjusted accordingly.
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33
3 Soldering
As the melting point of lead-free solder (Sn-Ag-Cu) is higher and has poorer wettability (flow), to prevent damage to the land
of the PWB, extreme care should be taken not to leave the bit in contact with the PWB for an extended period of time.
Remove the bit as soon as a good flow is achieved.
The high content of tin in lead free solder will cause premature corrosion of the bit.
To reduce wear on the bit, reduce the temperature or turn off the iron when it is not required.
Leaving different types of solder on the bit will cause contamination of the different alloys, which will alter their
characteristics, making good soldering more difficult.
It will be necessary to clean and replace bits more often when using lead-free solder. To reduce bit wear, care should be
taken to clean the bit thoroughly after each use.
CAUTION FOR BATTERY REPLACEMENT
PRECAUTIONS FOR USING LEAD-FREE SOLDER

FO-DC600U
<IMPORTANT PLEASE READ FIRST>
To avoid problems with supplies, please don’t use supplies from other units. Please use new supplies, when supply changes are required.
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications
• GENERAL
Automatic dialing: Conventional Auto Dialing:
Rapid Key Dialing: 59 numbers
Speed Dialing: 200 numbers
Personal Auto Dial Books: 40 books
(59 Rapid Keys, 16 Speed Dial
numbers per book)
Memory size* : 16 MB (approx. 1,000 pages)
Optional memory: FO-8MK (8 MB;
approx. 500 pages)
Modem speed: 33,600 bps (max.) with automatic
fallback to lower speeds
Transmission time* : Approx. 2 seconds
Toner cartridge yield: Initial starter cartridge (included with
(continuous printing, fax machine): Approx. 3000 pages
4% page coverage, Replacement cartridge (FO-50ND):
letter paper) Approx. 6000 pages
Drum cartridge yield: Initial starter cartridge (included with
fax machine): 20,000 pages (avg.)
Replacement cartridge (FO-47DR):
20,000 pages (avg.)
Resolution: Standard: 203 x 98 lines/inch
(8 x 3.85 lines/mm)
Fine/Halftone: 203 x 196 lines/inch
(8 x 7.7 lines/mm)
Super fine: 203 x 391 lines/inch
(8 x 15.4 lines/mm)
Ultra fine: 406 x 391 lines/inch
(16 x 15.4 lines/mm)
Halftone (grayscale): 64 levels
Automatic document feeder: Letter paper (20 lb): Max. 50 pages
Legal paper: Max. 20 pages
(Note: 11” x 17” paper must be loaded
one page at a time.)
Paper capacity: 750 sheets (20 lb)
(500-sheet cassette available as option)
Compression scheme: MMR, MR, MH, Sharp (H2), JBIG
Applicable telephone line: Public switched telephone network
Compatibility: ITU-T (CCITT) G3 mode, Super G3
mode
Printing resolution: Horizontal: 406 dots/inch (16 dots/mm)
Vertical: 391 lines/inch (15.4 lines/mm)
600 x 600 dpi (Network Print: FO-NP1)
Input document size: Automatic feeding:
Width: 5.8 to 10.1” (148 to 256mm)
Length: 5.0 to 14.3” (128 to 364 mm)
Manual feeding:
Width: 5.8 to 11.0” (148 to 279 mm)
Length: 5.0 to 19.0” (128 to 483 mm)
Effective scanning width: 10.1” (256 mm) max.
Effective printing width: 8.0” (203 mm) max.
Printing speed: 16 ppm
Reception modes: Auto/Manual
Instascan speed: 1.3 sec/page (letter paper; scan time
only, excludes document feeding time)
Full Dual Access: Yes
Copy function: Single/Multi/Sort (99 copies/page)
Power requirements: 120 VAC, 60 Hz
Operating temperature: 50 - 86°F(10 - 30°C)
Humidity: 20 to 85 % RH
Power consumption: Stand-by: 9 W
Stand-by(all options installed: 16W
Maximum: 800 W
Dimensions: Width: 21.5” (546 mm)
Depth: 16.2” (412 mm)
Height: 17.0” (431 mm)
(Not including paper tray or attachments)
Weight: Approx. 48.5 lbs. (22.0 kg)
(Not including supplies paper tray or
attachments)
* Based on ITU-TTest Chart #1 at standard resolution, excluding time for
protocol signals (i.e., ITU-T phase C time only).
1 – 1
Toner cartridge Replacement cartridge 6,000 prints User
(FO-50ND) (at Letter/4% chart)
Drum cartridge Replacement cartridge 20,000 prints User
(FO-47DR) (at Letter/4% chart)
Paper feed Transfer roller (Refer to the P/G No. 10-8) 50,000 prints Service Engineer
(0KW4127410302)
Fuser Fusing unit (Refer to the P/G No. 9-14) 50,000 prints Service Engineer
(0KW4127035501)
Paper transport Paper transfer roller (Refer to the P/G No. 8-6) Cleaning as needed ———————
(0KW4127300101)
[2] Life of consumable
Section Part Estimated Life Replaced by

FO-DC600U
[3] Operation panel (1)
Display
This displays messages and prompts to help you operate
the machine.
TONER indicator
This blinks when the toner cartridge nears empty, and lights
steadily when the toner cartridge needs replacement.
ALARM indicator
This blinks when one of the paper sources is empty or the
drum cartridge is near the end of its life (printing is still
possible). This lights steadily when the drum cartridge has
reached the end of its life, all paper sources are empty, the
print compartment cover is open, or a paper jam has
occurred (printing is not possible). A message will appear in
the display to indicate the problem.
1
2
3
Q / ! W / " E / # R / $ T / % Y / & U / ' I / ( O / ) P / =
SYMBOL A / |S D F G / { H / } J / [ K / ] L / +
Caps Lock Z / < X / > C V B N / * M / ? @ .com
SHIFT / ^ / / \ ; / : Space _- . / , DEL
Q / ! W / " E / # R / $ T / % Y / & U / ' I / ( O / ) P / =
SYMBOL A / |S D F G / { H / } J / [ K / ] L / +
Caps Lock
PAGE COUNTER CONFIDENTIAL TIMER COVER SHEET LIFE MEM.STATUS REPORT DOCUMENT
Z / < X / > C V B N / * M / ? @ .com
SHIFT / ^ / / \ ; / : Space _- . / , DEL
01 02 03 04 05 06 07 08 09 10
11 12 13 14 15 16 17 18 19 20
40 41 42 43 44 45 46 47 48 49
50 51 52 53 54 55 56 57 58 59
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39
JKL
ABC
1
DEF
WXYZ
9
GHI
45
MNO
6
PQRS
7
TUV
8
0
2 3
OPER
PERSONAL
BOOK
SPEED DIAL
REDIAL
SPEAKER
JOB STATUS DUPLEX SCAN PRIORITY BROADCAST
MENU
UP
ZA
DOWN
START/
ENTER
COPY/HELP
STOP
22 2923 24 25 30
31 35 3632 34
28
33
2726
DATAlight
This blinks when the machine is receiving a print job over
the network (only when the network printer option is
installed).
FAX 1 / FAX 2 lights
When the dual line option is installed, FAX 1 lights when
Line 1 is being used and FAX 2 lights when Line 2 is being
used. When the dual line option is not installed, only FAX 1
lights when the telephone line is being used (the FAX 2
light does not operate).
4
5
ON LINE light
When this light is on, the machine can receive data (print
jobs) over the network. The light is turned on or off with the
ON LINE key. (Only available when the network printer
option is installed).
CONTRAST key
Press this key to adjust the contrast before sending or
copying a document.
E-mail key
Press this key to send a scanned document to an e-mail
recipient. (Only available when the network scanner option
is installed).
RESOLUTION key
Press this key to adjust the resolution before sending or
copying a document. An indicator will light next to the
selected setting (HALFTONE, STANDARD, FINE, SUPER
FINE or ULTRA FINE).
ON LINE key
Press this key to select whether the machine is online or
off-line (the ON LINE light is on when the machine is
online). The machine must be online to receive print
jobs over the network. (Only available when the network
printer option is installed).
6
10
9
8
7
11
Rapid Dial Keys
Press one of these keys to dial a fax number automatically,
or specify an e-mail recipient if the network scanner option
is installed. Note that you must attach the Rapid Key labels.
When navigating through the display menu, a Rapid Key
can also be pressed in place of the numeric keys to enter
a two-digit number (for example, you can press Rapid Key
01 to enter the number "01").
SYMBOL key
When entering a name, press this key to enter the symbol
on a letter key (the character to the right of the slash).
Press the key again to turn off symbol entry mode.
PAGE COUNTER key
Press this key to include a slash and the total number of
pages after each page number on the pages of a
transmitted document.
CONFIDENTIAL key
Press this ke
y
to send or
p
rint out a confidential document.
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12
13
SUPER FINE
DOCUMENT COMMUNICATION SYSTEM
HALF TONE
CONTRAST RESOLUTION e-mail ON LINE
STANDARD
FINE
ULTRA FINE
DATA
ON LINE
Network
FAX2FAX1
ALARM
TONER
1 3 4 5 62
7 98 10
LINE
11
11 14 15 16 17 18 19 2012 13 21
1 –2

FO-DC600U
1 –3
15
TIMER key
Press this key to set a fax operation to be performed
automatically at a later time.
COVER SHEET key
Press this key to include a cover sheet when sending a fax.
LIFE key
Press this key, followed by , to check the total number of
pages printed by the fax machine. (Press to return to the
data and time display.
MEM. STATUS key
Press this key to check the status of fax transmission jobs,
copy jobs, and fax receptions. This key can also be used to
cancel a job.
REPORT key
Press this key to print out a report on the most recently
completed transmission or reception.
DOCUMENT key
Press this key to transmit a document directly from the feeder
without reading it into memory.
16
18
19
17
20
23
22
START/
ENTER
STOP
JOB STATUS key
Press this key to display the FAX-STATUS screen, which
shows information on the fax job that is currently in progress.
If the dual line option is installed, the fax status will appear
separately for each line. If the network printer option is
installed, the NETWORK PRINT STATUS screen showing
information on current printer activity will appear following
the FAX STATUS screen (note that "IDLE" will appear if a
print job has been executed but is not yet being printed).
To cancel a job that is in progress, display the job in the
status screen and then press . To move through each of
the screens and return to the date and time display, press
one or more times as needed.
DUPLEX SCAN key
Press this key to transmit or copy a two-sided document.
PRIORITY key
Press this key when you need to transmit a document ahead
of other documents waiting in memory for transmission.
BROADCAST key
Press this key to send a document to a group of fax
machines, or to a group of e-mail recipients if the network
scanner option is installed.
24
25
26
27
STOP
JOB STATUS
PERSONAL BOOK
Press this key to use or store an auto-dial number in a
personal book. If the book has a passcode, enter the
passcode; otherwise, select the book with or and
press .
SPEED DIAL key
Press this key to dial a Speed Dial number.
MENU key
Press this key to select special functions and setting.
UP and DOWN arrow keys
Volume setting: Press these keys to change the speaker
volume when the SPEAKER key has been pressed, or the
ringer volume at any other time.
MENU key settings: Press these keys after pressing the
MENU key to scroll through the MENU key settings.
29
28
START/
ENTER
Dial keypad (numeric keys)
Use these keys to dial and program fax numbers.
REDIAL key
Press this key to automatically redial the last number dialed.
SPEAKER key
Press this key when transmitting a document by Normal
Dialing to listen to the line and verify the response of the
receiving fax machine.
START/ENTER key
Press this key to begin fax transmission when using Speed
Dialing, Direct Keypad Dialing, or Normal Dialing. This key is
also used to select settings in the MENU key menu and
complete entries when storing names and numbers.
Left and right arrow keys
Auto-dial numbers: Press these keys to search for an
auto-dial number when sending a fax.
STOP key
Press this key to cancel an operation before it is completed.
31
32
33
34
35
36
COPY/HELP key
When a document is in the feeder, press this key to make a
copy of a document. At any other time, press this key to print
out the Help List, a quick reference guide to the operation of
your fax machine.
30
LINE key
When the dual line option has been installed, press this key
before dialing to select the line.
21
Operation panel (2)
[4] Transmittable documents
Refer to the service manual of FO-DC500U.
[5] Installation
Refer to the service manual of FO-DC500U.
[6] Quick reference guide
Refer to the service manual of FO-DC500U.

FO-DC600U
[7] Installing the Dual Line Kit (FO-60DL)
Note: The FO-60DL Dual Line Kit cannot be installed if the FO-NP1
Network Printer Kit is installed.
Important! The following procedure is to be performed only by a quali-
fied service technician. Be sure to turn off the power, unplug the power
cord,andunplugthetelephone line before proceeding. In addition, touch
a grounded piece of metal to discharge any static electricity that may be
on your body. Make sure that an extension phone is not connected to
the machine.
1 Press the cover release to open the print compartment cover.
2 Remove 6 screws from the rear cover.
(Remember which screw secures the small cover on the left side of
the rear cover, as it must be replaced in the same position).
Remove the small cover, and then remove the screw underneath.
Remove the rear cover.
3 Remove 6 screws and then remove the metal plate.
4 Remove the screw that holds the small side plate to metal plate that
was removed Step 3. Slide the small side plate up and remove it
from the metal plate. (Note: The small side plate is not no longer
needed, however, the screw is used again in “b” of Step 5.)
6 Replace the metal plate and secure with screws in the order shown.
7 Attach the dual line control board.
a. Insert the bushing into the hole in the dual line control board from
the outer side and secure it with the collar on the inner side.
b. Insert the winged end of the pin spacers into the metal plate, with
wings extended out vertically.
c.Attach the board so that the connector inserts into the connector in
the metal plate. Make sure that the pin spacers go into the holes
in the board. Secure the board with the 18 mm screw (which goes
into the bushing) and the remaining 6 mm screw. Tighten the
screws in the order shown.
1 – 4
8
Fasten the band to the core as shown and cut off the excess end.
Insert the cable through the core and wind it around the core twice.
5 a. Attach the LIU board to the metal plate, positioning the modular
jacks as shown. The bottom edge of the board should fit into the
slots indicated by the arrows. Secure the LIU board with two of the
6 mm screws.
b. Attach the provided metal side plate.
a
b
1
2
3
4
b
a
c
1
2

FO-DC600U
[8] Installing the Third Paper Cassette (FO-CS1)
Important! Be sure to turn off the power and unplug the power cord
before proceeding.
1 Removethe packing material and tapefrom the third papercassette.
2 Remove the covers from the sides of the second cassette (the cas-
settealreadyinstalled on the machine), using a flat-headscrewdriver
to pry each of the catches at the bottom of the covers free (2 on the
right cover, 3 on the left cover).
1 –5
F
Replace the rear cover.
(Be sure to replace the screw that secures the small cover in the
same position, as it is for plastic.)
9 Connect the cable to the LIU board and the dual line control board.
Secure the core band with the 10 mm screw.
For plastic
G Affix the “”LINE 2”label above the new jack.
LINE 2
3 Insert the green gear into the third cassette as shown. The side of
the gear that has the small thirdly gear should face the inside of the
cassette, and should fit onto the metal shaft. Push the gear in until
the tab on the outer side goes into the slot on the metal shaft. (Note:
The gear is only used in the third cassette.)
4 Place the machine on top of the third cassette, and remove the small
cover from the rear of the second cassette. Connect the 10-pin cable
as shown, and insert it behind the guide indicated by the white arrow.
5 Change the positions of the connectors on the circuit board of the
third cassette as shown (do not change the connectors on the sec-
ond cassette). Replace the small cover on the rear of the second
cassette, and attach the provided small cover on the rear of the third
cassette.
6 Attach the large support plate and then the small support plate to the
right side of the cassettes. Use 6 mm screws for the holes marked
with “A”, and 10 mm screws for the holes marked with “P”. Secure
the screws in the order indicated by the numbers.
A2A2 A1A1
P3P3A3A3
A3A3
A4A4 P4P4
A4A4
2
1
7 Attach the support plate to the left side of the cassette. Use 6 mm
screwsforholesmarkedwith“A”,and10mmscrewsforholesmarked
with “P”, securing the screws in the order indicated by the numbers.
(Note that the top hole on the right does not require a screw.)
A1
A3
A4
A2
P6 P5

FO-DC600U
Output Voltage limits Note
+5V MAIN 4.947V~5.25V CN5 7pin ↔8pin
+24V SUB 23.04V~24.96V CN5 1pin ↔2pin
CHAPTER 2. ADJUSTMENTS
[1] Adjustments
General
Sincethefollowingadjustments and settings are provided for this model,
make adjustments and/or setup as necessary.
1. Adjustments
Adjustments of output voltage (FACTORY ONLY)
1. Install the power supply unit in the machine.
2. Set the recording paper and document.
3. When the document is loaded, power is supplied to the output lines.
Confirm that outputs are within the limits below.
Output voltage settings
Fig. 1
POWER
SUPPLY
PWB
CONTROL PWB
PRINTER PWB
HIGH VOLTAGE
PWB
CN5 CN1
CNPW1 CNPRT1
1
112 130
CN1
130
12
CN1
VR51
[DO NOT TOUCH!]
1
10
CN7 CN4
1
8
1
10
1
8
2
DISPLAY:
KEY:
22: DIAL MODE
1=TONE, 2=PULSE
(step 2) Select "DIAL MODE".
2
2
(step 1) Select "OPTIONAL SETTING".
DISPLAY:
DISPLAY:
DISPLAY: TONE SELECTED
KEY:
MENU 4
KEY:
4:OPTIONAL SETTING
ENTER #(01-36, , )
KEY:
22: DIAL MODE
KEY:
KEY:
DISPLAY:
(step 4) End, using the "STOP" key.
(step 3) Select, using "1" or "2".
(step 2) Select "DIAL MODE".
1
2
PULSE SELECTED
2
STOP
1
DISPLAY:
KEY:
1: LINE-1
1=TONE, 2=PULSE
Select line using "1" or "2"
2
DISPLAY:
KEY:
2: LINE-2
1=TONE, 2=PULSE
<With optional line unit>
22: DIAL MODE
1=LINE-1, 2=LINE-2
2. IC protectors replacement
ICPs (IC Protectors) are installed to protect the CIS unit, panel PWB
unit,TX motor drive circuit and verification stamp drive circuit. ICPs pro-
tect various ICs and electronic circuits from an overcurrent condition.
The location of ICPs are shown below:
(1) F1 (ICP-S0.5) F2 (ICP-S1.0) is installed in order to protect IC’s from an
overcurrent generated in the CIS unit. If F1 or F2 are open, replace it with a
new one.
(2) F5 (ICP-S1.0) is installed in order to protect IC’s from an overcurrent gener-
ated in the panel PWB unit. If F5 is open, replace it with a new one.
(3) F100 (ICP-S1.0) is installed in order to protect IC’s from an overcurrent gen-
erated in the verification stamp drive circuit. If F100 is open, replace it with a
new one.
(4) F101 (ICP-S1.8) is installed in order to protect IC’s from an overcurrent gen-
erated in the TX motor drive circuit. IfF101 is open, replace itwith a new one.
(5) F102 (ICP-S0.7) is installed in order to protect IC’s from an overcurrent gen-
erated in the LCD drive circuit. If F102 is open, replace it with a new one.
In addition to the replacement of F1, F2, F5, F100, F101 andF102 the factor
causing F1, F2, F5, F100, F101 and F102 to open must also be repaired. If
not, F1, F2, F5, F100, F101 and F102 will open again.
Replacement parts
ICP-S0.5 (Sharp code: VHViCPS05//-1)
ICP-S0.7 (Sharp code: VHViCPS07//-1)
ICP-S1.0 (Sharp code: VHViCPS10//-1)
ICP-S1.8 (Sharp code: VHViCPS18//-1)
Fig. 2
CONTROL PWB
(TOP SIDE)
CNLIU1
CNSP1
CNSEN1
CNCIS1 CNPN1
CNSTP1 F1/F2/F5:Top side
F100/F101/F102:Bottom side
CNTXM1
IC3
1
1
8
10 1 11214
27
228
F1 F2 F5 F100 F101
2
CNPW1
12 1
F102
2 – 1
Connector CN4
No.
Pin No. CN1
1 11 +5V
2 10 CH LREM
39TVR
4 8 T MON V
5 7 T MON I
6 6 B VR
7 5 V REM
8 4 C MON
93MG
10 2 +24V
Connector CN1
No.
Pin No. CN7
1 +24V MAIN
2MG
3DG
4DG
5 +5V MAIN
6 +5V MAIN
7 HEATER ON
8 H-RELAY OFF
Connector CN5
No.
Pin No. CNPW1
1 +24V SUB
2MG
3MG
4MG
5 +24V MAIN
6 +24V MAIN
7 +5V MAIN
8DG
9DG
10 DG
11 +5V MAIN
12 +5V MAIN
3. Settings
(1) Dial mode selector
OPTION SETTING: DIAL MODE (Soft Switch No. SW2 DATANo. 1 for
Line-1 and SW24 DATA No.1 for Line-2 with Optional Dual Line Kit)
Use this to set the fax machine to the type of telephone line you are on.
• The factory setting is "TONE".

FO-DC600U
[2] Diagnostics and service soft switches
1. Operating procedure
Two kinds of diagnoses are supported.
1-1. Fax diagnosis
This diagnosis is concerned with the main body of fax which is used for
production and service support.
Entering the diagnostic mode
1-2. Print diagnosis
This diagnosis is concerned with the print which is used for production
and service support.
Entering the diagnostic mode
Memory clear when power is turned on
Pressing the START and STOP keys, turn on the main power, and the
following message will be displayed.
1 =All the data will be deleted including initially registered data.
2 = Delete the image file to be used in transmission. This will delete all
thedata related to communicationsuch as reserved transmission or
intercepting. However, the data initially registered will not be de-
leted.
3 = Memory will not be cleared and the machine enters stand-by mode.
Press , and the following
display will appear.
MENU
9 8 6
PCU ROM VER.:
(Diag • specifications)
MENU
986
START 01 AREA PRINT MODE 1
START 02 CHECK PATTERN 1
START 03
CHECK PATTERN 2
START04
CHECK PATTERN 3
START05
CHECK PATTERN 4
START06
PAPER FEED AGING 1
START07
PAPER FEED AGING 2
START
START
08
BIAS ADJUST MODE2
START
09
LIFE SET MODE
START
START
Then press the key. Select the desired item with the
key and the key or select with the rapidkey.
Enter the mode with the key.
START10
LIFE ALL CLEAR
START11
LIFE ENTRY MODE
PCU ROM Ver.:
START12
LIFE CLEAR MODE
MEMORY CLEAR ?
1 = ALL , 2 = IMAGE , 3 = NO
MENU
9 8 7
STARTA SOFT SWITCH MODE
START
B PRINT AREA
START
C ROM & RAM CHECK
START
D AUTO FEEDER MODE
STARTE AGING MODE
START
F PANEL CHECK MODE
START
G OPTICAL ADJUST MODE
START
H PRODUCT CHECK
START
ISIGNAL SEND MODE
START
JCOMM. CHECK MODE
START
KMEMORY CLEAR MODE
START
LFLASH MEMORY CHECK
START
MALL FAX/TEL. ENTRY MODE
START
START
N
O CONF. PASSCODE
START
PSIGNAL SEND MODE 2
START
Q
TA70
START
DEPT. PASSCODE
MENU
9 8 7
Press , and the following
display will appear.
START
Then press the key. Select the desired item with the key
and the key or select with the rapid key.
Enter the mode with the
START key.
(Diag •specifications)
MEMORY SET MODE
START
RSTAMP AGING MODE
START
SDIAL TEST MODE
START
T
U
COPY DIAG MODE
LCD CHECK MODE
VPERSONAL BOOK LIST
START
WFONT LIST PRINT MODE(*)
START
START
XNO FUNCTION
START
1st Line
2
nd
Line
3rd
Line F/W version
4th
Line NIC board version
5th
Line PCL board version
6th
Line
7th
Line Memory size
8th
Line GATE arrayA/B version
9th
Line
FAX : TA70
NIC : x.xxx
PRN : xxxx
PRN MEMORY SIZE = 16(MB)
GAA : ESx GAB : ESx
*: FONT LIST PRINT MODE can be used only when the
network function is effective.
2 –2