Sharp FO-1850 User manual

SERVICE MANUAL
No. 00ZF1850THSME
FACSIMILE
MODEL FO-1850
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
SHARP CORPORATION
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.
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications . . . . . . . . . . . . . . . . . . . . .1-1
[2] Operation panel . . . . . . . . . . . . . . . . . . . .1-2
[3] Transmittable documents . . . . . . . . . . . .1-3
[4] Installation . . . . . . . . . . . . . . . . . . . . . . . .1-4
[5] Quick reference guide . . . . . . . . . . . . . . .1-9
CHAPTER 2. ADJUSTMENTS
[1] Adjustments . . . . . . . . . . . . . . . . . . . . . . .2-1
[2] Diagnostics and service soft switch . . . . .2-2
[3] Troubleshooting . . . . . . . . . . . . . . . . . . .2-19
[4] Error code table . . . . . . . . . . . . . . . . . . .2-20
CHAPTER 3. MECHANISM BLOCKS
[1] General description . . . . . . . . . . . . . . . . .3-1
[2] Disassembly and assembly
procedures . . . . . . . . . . . . . . . . . . . .3-4
CHAPTER 4. DIAGRAMS
[1] Block diagram . . . . . . . . . . . . . . . . . . . . .4-1
[2] Wiring diagram . . . . . . . . . . . . . . . . . . . .4-2
[3] Point-to-pointdiagram . . . . . . . . . . . . . . .4-3
CHAPTER 5. CIRCUIT DESCRIPTION
[1] Circuit description . . . . . . . . . . . . . . . . . .5-1
[2] Circuit description of control PWB . . . . . .5-2
[3] Circuit description of TEL/LIU PWB . . . . .5-9
[4] Circuit description of
power supply PWB . . . . . . . . . . . . .5-11
[5] Circuit description of CCD PWB . . . . . .5-11
CHAPTER 6. CIRCUIT SCHEMATICS AND
PARTS LAYOUT
[1] Control PWB circuit . . . . . . . . . . . . . . . . .6-1
[2] TEL/LIU PWB circuit . . . . . . . . . . . . . . .6-10
[3] Power supply PWB circuit . . . . . . . . . . .6-12
[4] CCD PWB circuit . . . . . . . . . . . . . . . . . .6-14
[5] Operation panel PWB circuit . . . . . . . . .6-15
[6] Joint PWB circuit . . . . . . . . . . . . . . . . . .6-17
[7] Multifunction interface PWB circuit . . . .6-19
CHAPTER 7. OPERATION FLOWCHART
[1] Protocol . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
[2] Power on sequence . . . . . . . . . . . . . . . . .7-2
CHAPTER 8. OTHERS
[1] Service tools . . . . . . . . . . . . . . . . . . . . . .8-1
[2] IC signal name . . . . . . . . . . . . . . . . . . . . .8-4
PARTS GUIDE
CONTENTS
FO-1850TH

(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 angegebenen Anweisungen.
CAUTION FOR BATTERY REPLACEMENT
FO-1850TH

CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications
Applicable telephone line: Public switched telephone network
Compatibility: ITU-T (CCITT) G3 mode
Configuration: Half-duplex, desktop transceiver
Memory size*: 512 KB (approx. 39 average pages
with no voice messages or OGMs re-
corded)
1 MB add-on available as option
Compression scheme: MH, MR, MMR
Scanning method: Flat-bed, solid-state CCD
Resolution: Horizontal:
8 dots/mm
Vertical:
Standard: 3.85 lines/mm
Fine/Halftone: 7.7 lines/mm
Super fine: 15.4 lines/mm
Recording system: Thermal transfer recording
Display: 7 x 5 dots, 1 line by 16-digit display
Reception modes: FAX/TEL/ANS
Modem speed: 14400 bps with automatic fallback to
12000, 9600, 7200, 4800, or 2400
bps
Transmission time* : Approx. 6 seconds (Memory trans-
mission)
Effective recording width: 203 mm (average)
Input document size: Auto feeding:
Width: 148 to 216 mm
Length: 128 to 356 mm
Manual feeding:
Width: 148 to 216 mm
Length: 128 to 1000 mm
Effective scanning width: 210 mm max.
Automatic document feeder: 20 sheets max.
Halftone (gray scale): 64 levels (for photo transmission)
Contrast control: Automatic/Dark selectable
Copy function: Single/Multi-copy/Sort-copy (99 cop-
ies/page)
Telephone function: Standard
(cannot be used if power fails)
Power requirements: 230 to 240 V AC, 50 Hz
Operating environment: 5 to 35°C, 20 to 80 % RH
Power consumption: Stand-by: 11 W
Maximum: 110 W
Dimensions: Width: 363 mm
Depth: 488 mm
Height: 188 mm (Without attach-
ments)
Weight: Approx. 5.9kg
* Based on ITU-T (CCITT) Test Chart #1 at standard resolution in
MMR (Memory Transmition), excluding time for protocol signals
(i.e., ITU-T phase C time only).
As a part of our policy of continuous improvement, SHARP reserves the right to make design and specification changes for procduct
improvement without prior notice. The performance specifications figures indicated are nominal values of production units. There may be some
deviation from these values in individual units.
FO-1850TH
1 – 1

[2] Operation panel
12
ABC 3 DEF
4
GHI 5 JKL 6 MNO
7
PQRS 8 TUV 9 WXYZ
0
SPEED DIAL
VOLUME
START
REDIAL
HOLD/SEARCH
SPEAKER
RECEPTION
MODE
FUNCTION MEMORY RESOLUTION
01 02 03 04 05
06 07 08 09 10
11 12 13 14 15
16/P1 19/G2
20/POLL 17/P2 18/G1
DOWN UP
COPY/HELP STOP
Number keys
Use these keys to dial
numbers, and enter
numbers and letters
during number/name
storing procedures.
HOLD/SEARCH key
Press this key to search
for an automatic dialing
number, or, during a
phone conversation,
press this key put the
other party on hold.
SPEAKER key
Press this key
to dial a number
without picking
up the handset.
REDIAL key
Press this key to
automatically redial
the last number dialed.
SPEED DIAL key
Press this key to
dial a 2-digit
Speed Dial
number.
Display
This displays various
messages during operation
and programming.
Rapid Dial Keys
Press one of these
keys to dial a fax or
voice number
automatically. ( Note
that you must attach
the Rapid Key labels.)
START key
Press this key to
send or receive a
document.
COPY/HELP key
When a document is
in the feeder, press
this key to make a
copy. At any other
time, press this key
to print out the Help
List, a quick reference
guide to the operaion
of your fax.
STOP key
Press this key to stop
operations before
they are completed.
VOLUME keys
Press these keys to
adjust the volume of
the speaker when the
SPEAKER key has
been pressed,or the
volume of the ringer at
all other times.
RECEPTION MODE key
Press this key to select the
mode of reception.
FUNCTION key
Press this key to select
various special functions.
RESOLUTION key
Press this key to adjust
the resolution and
contrast before sending or
copying a document.
MEMORY key
Press this key to
scan a document
into memory before
transmitting it.
REC/MEMO
••• REPEAT ••• PLAY/SKIP ••• DELETE ••• REMINDER
•••
FAST PLAY key
Press this key to
increase the speed
of message playback.
SLOW PLAY key
Press this key to
reduce the speed
of message playback.
REPEAT key
Press this key to
repeat playback of a
message.
REC/MEMO key
Press this key to
record a phone
conversation or a
message.
REMINDER key
Press this key to send a
fax and/or voice message
to another party or yourself
at a preset time.
DELETE key
Press this key to
erase recorded
messages.
PLAY/SKIP key
Press this key to play
recorded messages.
During playback, press
it to skip forward to the
next message.
FO-1850TH
1 – 2

[3] Transmittable documents
1. Document Sizes
Normal size width 148 – 216 mm
length 128 – 297 mm
* With special sizes, only one sheet can be fed into the machine at
a time. Insert next page into feeder as current page is being
scanned.
2. Paper Thickness & Weight
Normal size
ADF 10
sheets
Thickness 0.06–0.12 mm
Weight 52–104g/m2
14–28lbs
ADF 20
sheets
Thickness 0.06–0.09 mm
Weight 52–74.3g/m2
14–20lbs
Special size Thickness 0.12–0.20 mm
Weight 52–157 g/m2
3. Document Types
•Normal paper
Documents handwritten in pencil (No. 2 lead or softer), fountain
pen, ball-point pen, or felt-tipped pen can be transmitted.
Documents of normal contrast duplicated by a copying machine
can also be transmitted.
•Diazo copy (blue print)
Diazo copy documents of a normal contrast may be transmitted.
•Carbon copy
A carbon copy may be transmitted if its contrast is normal.
4. Cautions on Transmitting Documents
•Documents written in yellow, greenish yellow, or light blue ink
cannot be transmitted.
•Ink, glue, and correcting fluid on documents must be dry before the
documents can be transmitted.
•All clips, staples and pins must be removed from documents be-
fore transmission.
•Patched (taped) documents should be copied first on a copier and
then the copies used for transmission.
•All documents should be fanned before insertion into the feeder to
prevent possible double feeds.
5. Automatic Document Feeder Capacity
Number of pages that can be placed into the feeder at anytime is as
follows:
Normal size: max. ADF 20 sheets
Special size: single sheet only (manual feed)
NOTES: •When you need to send or copy more pages than the
feeder limit, place additional pages in feeder when last
page in feeder is being scanned.
•Place additional pages carefully and gently in feeder.
If force is used, double-feeding or a document jam may
result.
6. Readable Width & Length
The readable width and length of a document are slightly smaller than
the actual document size.
Note that characters or graphics outside the effective document scan-
ning range will not be read.
•Readable width
210 mm, max.
•Readable length
This is the length of the document sent minus 4 mm from the top and
bottom edges.
(Min.) (Max.)
A4 size
(Max.)
128mm
297mm 1000mm
148mm 216mm
[Normal size] 216mm [Special size]
Use document carrier sheet for smaller documents.
4mm
4mm
Readable length
Readable width
FO-1850TH
1 – 3

7. Use of Document Carrier Sheet
A document carrier sheet must be used for the following documents.
•Those with tears.
•Those smaller than size 148 mm (W) x 128 mm (L).
•Carbon-backed documents
NOTE: To transmit a carbon-backed document, insert a white sheet
of paper between the carbon back of the document and the
document carrier.
•Those containing an easily separable writing substance (e.g., trac-
ing paper written on with a soft, heavy lead pencil).
NOTES: •When using the document carrier, carefully read the in-
structions written on the back.
•If the document carrier is dirty, clean it with a soft, moist
cloth, and then dry it before using for transmission.
•Do not place more than one document in the carrier at a
time.
[4] Installation
1. Site selection
Take the following points into consideration when selecting a site for
this model.
ENVIRONMENT
•The machine must be installed on a level surface.
•Keep the machine away from air conditioners, heaters, direct sun-
light, and dust.
•Provide easy access to the front, back, and sides of the machine.
In particular, keep the area in front of the machine clear, or the
original document may jam as it comes out after scanning.
•The temperature should be between 5°and 35°C.
•The humidity should be between 30% and 85% (without conden-
sation).
ELECTRICITY
230-240V, 50 Hz, grounded (2-prong) AC outlet is required.
Caution!
•Connection to a power source other than that specified will cause
damage to the equipment and is not covered under the warranty.
•If your area experiences a high incidence of lightning or power
surges, we recommend that you install a surge protector for the
power and telephone lines. Surge protectors can be purchased at
most telephone specialty stores.
If the machine is moved from a cold to a warm place...
If the machine is moved from a cold to a warm place, it is possible
that the reading glass may fog up, preventing proper scanning of
documents for transmission. To remove the fog, turn on the power
and wait approximately 2 hours before using the machine.
TELEPHONE JACK
A standard RJ11C telephone jack must be located near the machine.
This is the telephone jack commonly used in most homes and offices.
•Plugging the fax machine into a jack which is not an RJ11C jack
may result in damage to the machine or your telephone system. If
you do not know what kind of jack you have, or needed to have
one installed, contact the telephone company.
2. Installing the imaging film (FO-16CR)
1 Grasp the finger hold on the right side of the printing compartment
cover, and pull up to open the cover.
2 Push back the green levers on each side of the printing compart-
ment, and rotate the printing head frame up and to the rear.
•Caution! The printing head (the strip of metal on the under-
side of the frame) applies heat to the printing film. It
may be hot if a document has just been printed.
3 If you are replacing the imaging film, take the old film out of the
printing compartment and remove the three (3) green gears and
the green flange from the ends of the spools.
DO NOT DISCARD THE GREEN GEARS AND THE GREEN
FLANGE!
Direction of insertion
Make print straight
across paper
E.G.
Place the document
carrier in the document
feeder with the clear film
side down
FO-1850TH
1 – 4

4 Take the new film out of its package, and insert two of the gears
provided with the fax into the ends of the spool with film.
Make sure that the two tabs on the gears fit properly into the slots
in the ends of the spool.
•Do not yet remove the band which holds the spools together.
5 Hold the empty spool so that the end with only one slot is on the
left, and lower the spools into the front of the printing compart-
ment. The gears in the ends of the spool with film should fit into
the slots on each side of the printing compartment.
6 Cut the band which holds the spools together with scissors, and
remove it. Insert the remaining gear into the right end of the empty
spool and the flange into the left end of the empty spool. Make
sure the tabs on the gear and the flange fit into the slots in the
ends of the spool (the gear has two tabs and the flange has one
tab.)
7 Pull the empty spool toward the back of the compartment, unwind-
ing the film as you pull.
8 Insert the empty spool into the back of the compartment so that
the gear and the flange fit into the slots on the sides of the
compartment.
•Make sure that the gear engages with the gear below it.
9 Wind the film slightly (rotate the gear on the right side of the
empty spool) so that there is no slack in the film. Make sure that
both edges of the film wind onto the spool evenly.
F Rotate the printing head frame back down, and press down on the
"PUSH" mark in the center of the frame until the frame clicks into
place. Close the printing compartment cover.
G If you replaced the film, initialise the new film by pressing the
FUNCTION key, the "6" key, and the "#" key on the operation
panel. Make sure that "INITIALISE FILM" appears in the display,
and then press the START key. (Do not perform this step if you
installed the initial sample roll of film.)
•You must initialise FO-16CR film to make it wind to the starting
position for printing. If this is not done, the first pages you print
will come out blank.
Note that initialisation will not be possible if the paper tray is not
in the fax.
2 tabs
2 slots
1 tab 1 slot
Flange
Gear
2 slots
2 tabs
6
FUNCTION
START
FO-1850TH
1 – 5

3. Assembly and connections
1 Plug the power lead into a standard voltage, earthed AC outlet.
•The fax does not have a power on/off switch, so the power is
turned on and off by simply plugging or unplugging the power
lead.
2 Connect the handset lead to the handset and the fax as shown.
•The ends of the handset lead are identical, so they will go into
either socket.
Place the handset on the handset rest.
3 Attach the received document tray by inserting the tabs into the
holes in the rear of the fax.
4 Insert one end of the telephone line cord into the socket on the
back of the fax marked "TEL. LINE". Insert the other end into the
telephone socket on the wall.
◆Be sure to plug the line cord into the TEL. LINE socket on the
fax. Do not plug it into the TEL. SET socket.
4. Loading printing paper
The paper tray holds the paper on which received documents and
copies are printed. Up to 300 sheets of A4 size paper from 60 to 90
g/m2can be loaded in the tray. For the best results, we recommend
that you use Sharp FO-16NC (A4 size) or paper.
1 If the paper tray is in the fax machine, remove the cover. Grasp
the end of the paper tray, lift it slightly, and pull it out of the fax
machine.
•Important: You must remove the paper tray from the fax ma-
chine to add paper.
2 Push the pressure plate down until it locks into position.
3 Fan the paper and then place it in the paper tray, print side up.
Make sure the corners of the paper go under the holders, and
then shake the tray gently to straighten the paper.
Use the handset to make ordinary
phone calls, or to transmit and
receive documents manually.
TEL.
SET TEL.
LINE
FO-1850TH
1 – 6

4 Insert the paper tray into the fax machine, making sure it clicks
into place.
5 Replace the paper tray cover.
•The paper tray cover also serves as a tray for original docu-
ments which come out of the fax after scanning for transmis-
sion or copying. You can pull out the cover as needed to en-
sure that it catches the documents.
6 Your fax has been set at the factory to print on regular paper. If
you have loaded Sharp FO-16NC paper, you must change this
setting to "HIGH QUALITY". Press the "FUNCTION" key, the "6"
key, the " " key two times, and then press "1" to select regular,
or "2" to select Sharp high quality paper. When finished, press the
STOP key. Be sure to change this setting again if you change
back to regular paper.
5. Clearing paper jams
If a document doesn’t feed properly during transmission or copying,
or DOCUMENT JAMMED appears in the display, first try pressing the
START key. If the document doesn’t feed out, open the operation
panel (grasp the front edge at the "PANEL RELEASE" mark and pull
up) and pull it out gently.
1 Grasp the finger hold on the right side of the printing compartment
cover, and pull up to open the cover.
2 Push the green levers back on each side of the printing compart-
ment, and rotate the printing head frame up and to the rear.
•Caution! The printing head (the strip of metal on the under-
side of the frame) applies heat to the printing film. It
may be hot if a document has just been printed.
3 Remove the imaging film from the printing compartment and set it
on a sheet of paper.
4 Remove the paper tray from the fax.
6
FUNCTION
1
or
2
STOP
FO-1850TH
1 – 7

5 Gently pull the jammed paper out of the printing compartment.
6 Replace the imaging film, making sure that the flange goes into
the rear slot on the left side of the printing compartment. Also,
make sure that the right, rear gear engages with the gear below it.
7 Wind the film slightly (rotate the gear on the right side of the rear
spool) so that there is no slack in the film. Make sure that both
edges of the film wind onto the spool evenly.
8 Rotate the printing head back into place. Close the printing com-
partment cover and replace the paper tray.
ABC DEF
GHI JKL MNO
PQRS TUV WXYZ
123
456
789
0
SPEED DIAL
REDIAL
HOLD/
SEARCH
SPEAKER
Space
Press this key twice
to enter a space.
Letters and numbers
To enter a letter or number, press
the appropriate key repeatedly until
the desired number/letter appears
in the display (the number appears
first, then the letters in the order
shown above the key).
Delete
Press this key to delete the letter
highlighted by the cursor (if the
cursor is to the right of the last
letter entered, it will backspace
and delete the last letter).
Shift
Press this key once to change
case (press it again to change
back).
Cursor left
Press this key to move the cursor
to the left.
Cursor right
Press this key to move the cursor
to the right.
Symbols
Press either key repeatedly until the
desired symbol appears (see the
symbol list on the following page).
FO-1850TH
1 – 8

6. Connecting the Multifunction interface box
The Multifunction Interface kit which comes with your fax machine
allows you to use your fax as a printer and scanner, and lets you
perform fax operations from your computer via the fax modem in your
fax machine. Follow the steps below to connect the Multifunction
Interface box and cables.
♦To install the Multifunction Interface software, see the instructions
in your Multifunction Interface operation manual.
Important:
Use only the provided interface cable and modular plug cable.
1. Make sure that your fax is unplugged and the power switch is
turned off on your computer.
2. Insert the female end of the interface cable into the serial
(RS232C) port on your computer. Tighten the screws with a
screwdriver.
3. Insert the male end of the interface cable into the port on the
Multifunction Interface box. Tighten the screws with a screwdriver.
4. Insert one end of the modular plug cable into the socket on the
Multifunction Interface box, and the other end into the socket on
your fax as shown (the ends of the cable are identical).
Modular
plug cable
Multifunction
interface box
Interface cable
Computer
Cover Sheet
Cover Sheet
Header
Timer Mode
Send Mode
Poll Mode
Listing Mode
Activity Report
Timer List
Telephone Number
List
Passcode List
Option Setting List
Anti Junk Fax
Number List
A.M. Program List
Message List
Program and Group
List
Print Set Up List
Entry Mode
Fax/Tel Numbers
for Auto Dialing
Own Number and
Name Set
Polling Security
Select
Passcode Numbers
for Polling
Date and Time Set
Store Junk Fax
Number
Optional Settings
Fine Resolution
Priority
Number of Rings in
Auto Mode
5 rings MAN. answer
Recall Interval
Recall Times
Tel/Fax Remote
Number
Remote Reception
Select
Transaction Report
Print Select
1
FUNCTION
23456 7
Print Set-up
Initialize Film
Reception Ratio
2 in 1 Print
Paper Type Set
Copy Cut-off
Program/Group
Program Entry
Mode
Group Entry
Mode
0
A.M. Settings
OGM Recording
Toll Saver
ICM Record Time
Remote Code
Overried Code
Transfer Number
Transfer On/Off
Fax Box
ICM Confirmation
On A.M. Failure
Box Passcode
Dial Mode
Tel/Fax Auto
Changeover
Pseudo Ringing
Fax Signal
Receive
Junk Number
Check
Polling
Autocover Sheet
Activity Report
ECM
[5] Quick reference guide
FUNCTION key menu
The following chart shows the layout of the functions and settings accessed by pressing the FUNCTION key. First press the FUNCTION key, the
appropriate numeric key as shown, and then "#" or " " until the desired item appears.
Instructions for making each setting appear in the display. If you have any difficulty, refer to the detailed instructions on the page shown below the
setting.
FO-1850TH
1 – 9

INSTALLATION
1. Connect the handset as shown.
2. Plug the power cord into an earthed, standard voltage outlet.
3. Plug one end of the telephone line into the "TEL. LINE" jack on the rear of
the fax, and the other end into your telephone wall jack.
INSTALLATION WITH AN EXTENSION TELEPHONE
4. Remove the seal covering the "TEL. SET" jack on the rear of the fax.
Connect an extension telephone to the "TEL. SET" jack.
ENTERING YOUR NAME AND NUMBER
1. Press the FUNCTION key and then press "3":
"ENTRY MODE" will appear in the display.
2. Press the "#" key twice:
"OWN NUMBER SET" will appear in the display.
3. Press the START key:
4. Enter your fax number (max. of 20 digits) by pressing the number keys.
♦If you make a mistake, press the HOLD/SEARCH key to move the cursor
back to the mistake, then enter the correct number or letter. (To move the
cursor forward, press the SPEAKER key.)
5. Press the START key:
6. Enter your name by pressing the appropriate number keys as shown below.
Press each key one or more times until the desired letter appears in the
display.
Press either key one or more times to select and enter a symbol.
♦Enter a space with the "1" key.
♦To enter two letters in succession which require using the same key, press
the SPEAKER key after entering the first letter.
Example: To enter "ABZ Co.", press:
"2" twice for the letter A,
Press SPEAKER to move the cursor to the right,
"2" three times for the letter B,
"9" five times for the letter Z,
"1" twice for a space,
"2" four times for the letter C,
Press REDIAL for a lower case letter,
"6" four times for the letter O,
"#" once for a period.
7. When finished, press the START key and then the STOP key.
TEL
.
SETTEL
.
LINE
ABC DEF
GHI JKL MNO
PQRS TUV WXYZ
123
456
789
0
SPEED DIAL
REDIAL
HOLD/SEARCH
SPEAKER
Deletes high-
lighted letter
Upper/lower
case shift key
Moves cursor
to the left.
Moves cursor
to the right.
SETTING THE DATE & TIME
To set date and time, press the following sequence of keys:
"DATE & TIME SET" will appear.
Press the START key:
Enter two digits for the Date (01 through 31).
Enter two digits for the Month (01 through 12).
Enter two digits for the Year (00 through 99).
Enter two digits for the Hour (00 through 23).
Enter two digits for the Minute (00 through 59).
When finished, press the START key and then the STOP key:
STORING & CLEARING NUMBERS FOR AUTOMATIC DIALING
To store a new number or change an existing number, press the following
sequence of keys:
"FAX/TEL # MODE" will appear.
1. Press the "1" key:
2. Enter a 2-digit number (from "01" to "99") by pressing the number keys. This
will be the Speed Dial number. Enter the fax/voice number by pressing the
number keys (max. of 32 digits).
3. Press the START key:
4. Enter the name of the location by pressing number keys (max. of 20 charac-
ters).
5. Press the START key:
6. Return to Step 2 to store another number, or press STOP to exit.
To clear a Speed Dial number, press the following sequence of keys:
Press "2" and then enter the 2-digit Speed Dial number.
Press:
SENDING DOCUMENTS
Normal Dialing
1. Lift the handset or press
2. Dial the fax number by pressing the number keys.
3. Wait for the reception tone (if a person answers, ask them to press their
Start key).
4. Press your START key and then replace the handset.
Rapid Key Dialing
Press the appropriate Rapid Key. Transmission will begin.
Speed Dialing
1. Press the SPEED DIAL key:
2. Enter the Speed Dial number by pressing the number keys.
3. Press:
Direct Keypad Dialing
1. Enter the fax number by pressing the number keys.
2. Press:
FUNCTION
3
Place your document (up to 20 pages)
face down in the document feeder.
FUNCTION
3
START
STOP
START
FUNCTION
3
START
1
SPEAKER
SPEED DIAL
STOP
START
STOP
START
FUNCTION
3
START
START
START
START
START
FO-1850TH
1 – 10

RECORDING AN OUTGOING MESSAGE
The answering machine in your fax has four boxes for recording incoming voice
messages when it is set to ANS reception mode. The General Box is for general
messages, and Box 1, Box 2, and Box 3 are each for personal messages. To
leave a message in a personal box, your caller must press the number of that
box on his or her telephone before speaking. If a number isn’t pressed, the
message will be recorded in the General Box.
Note: To use ANS mode, you must record a General outgoing message. To
use a personal box, you must also record an outgoing message for that
box.
Record an outgoing message for a box as follows:
1 Press the following sequence of keys:
2. Press a number key to select the outgoing message you want to record:
Generaloutgoing message
Box 1 outgoing message
Box 2 outgoing message
Box 3 outgoing message
Transferoutgoing message
3. Pick up the handset and speak into it.
4. When finished, press the STOP key, or replace the handset.
5. Go back to Step 2 to record an outgoing message for another box, or press
the STOP key to exit.
PROGRAMMING A PASSCODE
If desired, you can program a 3-digit passcode for a box. If this is done, the
passcode must be entered before messages in the box can be listened to or
erased.
Note: The numbers 1, 2, and 3 cannot be selected for the first digit of the
passcode.
1. Press the following sequence of keys:
2. Press "1" to enter a passcode, or "2" to clear a previously programmed
passcode.
3. Enter the number of the box for which you want to enter or clear a passcode.
If you are clearing a passcode, go to Step 5.
4. Enter a 3-digit passcode by pressing the number keys.
5. Press:
LISTENING TO MESSAGES
1. Press:
2. If you want to listen to the messages in a personal box, enter the number of
that box.
3. Enter the passcode for the box if it has one.
FUNCTION
0
START
FUNCTION
0
DELETINGMESSAGES
Erasing a single message:
Press the DELETE key white the message is being played.
Erasing all messages in the general box:
Hold down the DELETE key for at least 2 seconds. If the general box has a
passcode, press the DELETE key and then enter the passcode.
Erasing all messages in a personal box:
Press the DELETE key (do not hold it down), enter the box number, and then
enter the passcode if the box has one.
SETTING THE RECEPTION MODE
Press the RECEPTION MODE key until
"ANS", "FAX", or "TEL" appears in the
display.
ANS mode:
Select this mode when you go out and want the built-in answering machine to
record voice messages from callers. Both voices messages and faxes will be
received.
FAX mode:
The fax will automatically answer after four rings and receive the incoming
document.
TEL mode:
Lift the handset when the fax rings. If you hear a fax tone, press the START key.
If the calling party talks to you, press your START key to begin reception.
0
STOP
START
PLAY/SKIP
RECEPTION
MODE
FUNCTION RESOLUTION
1
3
2
4
FO-1850TH
1 – 11

CHAPTER 2. ADJUSTMENTS
[1] Adjustments
General
Since the following adjustments 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
Output Voltage limits
+5V 4.75V ∼5.25V
VM (+24V) 23.3V ∼24.7V
2. IC protectors replacement
ICPs (IC Protectors) are installed to protect the motor driver circuit.
ICPs protect various ICs and electronic circuits from an overcurrent
condition.
The location of ICPs are shown below:
(1) F100 (ICP-S07) is installed in order to protect IC’s from an over-
current generated in the motor drive circuit. If F100 is open, re-
place it with a new one.
3. Settings
(1) Dial mode selector
DIAL mode (Soft Switch No. SWB4 DATA No. 3)
CNSP
CNTH
CNPW
CNPN
CNCVR CNMT CNCCD
CNRBN
CNLIUA CNLIUA
CNLIUB CNLIUB
TEL/LIU PWB
CONTROL PWB POWER
SUPPLY
PWB
CNLIUA
CNLIUB
F100
CONTROL
PWB(TOP SIDE)
(step 1) Select "OPTION SETTING".
DISPLAY:
DISPLAY:
DISPLAY: TONE SELECTED
KEY:
FUNCTION 4
KEY:
OPTION SETTING PRESS OR #
KEY:
DIAL MODE 1=TONE, 2=PULSE
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
STOP
#### # # #
Cursor
When initially registering,
the mode shows 1=TONE.
When registering again, the
mode which was registered
formerly is shown.
Connector
No. CNPW
Pin No.
1MG
2MG
3MG
4VM
5VM
6DG
7DG
8 +5V
FO-1850TH
2 – 1

[2] Diagnostics and service soft switch
2. Diagnostic items
ITEM
No. RAPID key Contents Function
1 01 Soft switch setting mode Display soft SW contents, and changes the setting.
2 02 ROM&RAM check mode Checks program ROM (128KByte) and work RAM (32KByte).
3 03 Aging mode Prints the check pattern at the speed of 1 sheet/5 minutes.
4 04 Panel check mode Displays the name of key depressed on the operation panel.
5 05 Check pattern mode Prints 1 sheets of check pattern.
6 06 Signal send mode Sends modem signals sequentially.
7 07 Memory clear mode Clears the backup memory contents to reset it to the initial state.
8 08 CCD adjust mode Used for CCD adjustment. Executes copy operation. When the STOP key is pressed, the unit goes
into the wait state. When the START key is pressed again, the unit starts operation again.
9 09 All black copy mode Performs all-dot printing (approx. 3 sheets). (Check thermal head operation)
10 10 Auto feeder mode Feeds the original documents.
11 11 Entry data send Sends telephone list, own telephone number list and option set list contents in DTMF signal.
12 12 Entry data receive Receives telephone list, own telephone number list and option set list contents.
13 13 Flash memory check Checks flash memory write/read.
14 14 Flash memory clear Checks flash memory clearing.
15 15 RS232C check Checks RS232C interface box.
1. Operating procedure
(1) Entering the diagnostic mode
Press FUNC →9 →→8 →# →7 , and the following display will appear.
ROM Ver. FAZ0 After 2 sec: DIAG MODE
FAZ0
Then press the START key and country name selected by country select will appear. Select the desired item with the key or the # key
or select with the rapid key. Enter the mode with the START key.
(Diag•specifications)
FUNC Ver. FAZ0 DIAG MODE 987
START 01Soft switch setting mode
START 02ROM & RAM check mode
START 03Aging mode
START 04Panel check mode
START 05Check pattern mode
START 06Signal send mode
START
START
KEY
STOP
KEY +
+
"Power ON"
Memory clear
(Work + Backup)
"Power ON" and keep the STOP key pressed
while "WAIT A ...." is indicated.
Press the START key when "MEMORY CLEAR?" appears.
START12
START11
All black copy
START
10 Auto feeder mode
START
09
Entry data send
Entry data receive
START
14
START13 Flash memory check
Flash memory clear
START 07Memory clear mode CCD adjust mode
START
08
START15 RS232C check
If the diag mode cannot be set, repeat the diag mode operation,
performing the following operation.
After the power is turned on and "WAIT A MOMENT" is indicated,
press the STOP key.
FO-1850TH
2 – 2

3. Diagnostic items description
3. 1. Soft switch setting mode
Used to change the soft switch settings.
The soft switch which is stored internally is set by using the keys.
The available soft switches are SW-A1 to SW-M2.
The content of soft switches is shown in page 2-5 to 2-18.
The contents are set to factory default settings.
3. 2. ROM & RAM check mode
ROM executes the sum check, and RAM executes the matching test.
The result will be notified with the number of short sounds of the
buzzer as well as by printing the ROM & RAM check list.
Number of short sounds of buzzer 0 →No error
1 →ROM error
2 →RAM error
3. 3. Aging mode
If any document is first present, copying will be executed sheet by
sheet. If no document is present, the check pattern will be printed
sheet by sheet. This operation will be executed at a rate of one sheet
per 5minutes, and will be ended at a total of 10 sheets.
3. 4. Panel check mode
In this mode, whether each key operates properly or not is checked.
Press a key on the operation panel, and the corresponding key will be
displayed. In this mode, press the STOP key, and the list of the keys
pressed in this mode will be printed with the mode ended.
Whether all keys are pressed in this mode or not will be judged when
the list is printed, and the result will be printed.
3. 5. Check pattern mode
This mode is used to check the status of print head. Two sheets of
check pattern are printed. The following information of check pattern
is printed.
1 Vertical stripes (alternate white and black lines) Approx. 30 mm
2 Fullblack Approx.30mm
3. 6. Signal send mode
This mode is used to send various signals to the line.
FAX signals are sent in the level set by the soft switch.
[1] No signal [8] V.29 9600bps
(CML signal turned on) [9] V.29 7200bps
[2] V.33 14400bps [10] V.27 ter 4800bps
[3] V.33 12000bps [11] V.27 ter 2400bps
[4] V.17 14400bps [12] 300bps (FLAG)
[5] V.17 12000bps [13] 2100Hz (CED)
[6] V.17 9600bps [14] 1100Hz (CNG)
[7] V.17 7200bps [15] END
The signal can be checked by plugging the handset into the TEL line
connector on the rear of the machine.
3. 7. Memory clear mode
This mode is used to clear the backup memory and reset to the
default settings.
3. 8. CCD adjust mode
This mode is used to adjust the optical system. Since the copy is
function performed, set the original. To abort the copy operation,
press the STOP key. To restart press the START key. When the copy
is completed or when the STOP key is pressed in the interruption
state, exit from this mode occurs.
3. 9. All black copy mode
This mode is used to check the print head.
All-dot print is executed unconditionally until 2(m) is obtained except
when any trouble occurs (recording paper has run out, recording
paper jam, thermal protect).
3. 10. Auto feeder mode
In this mode, a document is inserted and discharged to check the
auto feed function.
After this mode is started, set a document, and the document feed
will be automatically tested.
3. 11. Entry data send
This mode is used to send the registered data to the remote machine
and make the remote machine copy the registered information. When
this mode is used for sending, the remote machine must be set to the
entry data receive mode.
The information to be sent is as follows.
1. Telephone book data
2. Transmitter registration data
3. Optional setting content
4. Soft switch content
5. Junk FAX number
6. Timer reservation data
(for models in which timer reservation is possible)
7. Pass code number
(only for models with polling function)
8. Program group information
1
2
FO-1850TH
2 – 3

3. 12. Entry data receive
This mode is used to receive the registered data which is sent from
the remote machine and to register the received data in the machine.
When this mode is used to receive the information, the remote ma-
chine must be set to the entry data send mode.
The information to be sent is as follows.
1. Telephone book data
2. Transmitter list
(The pass code is also printed on the polling type.)
3. Optional setting list
4. Soft switch list
5. Junk FAX number list
6. Timer reservation list
(for models in which timer communication is possible)
7. Pass code number
(only for models with polling function)
8. Program group information
3. 13. Flash memory check
Data is written into and read from the flash memory to check the data
conformity. When the unit enters this mode, the check is started.
3. 14. Flash memory clear
Data in the flash memory is cleared (memory clear). When the unit
enters this mode, the check is started.
* Operation of hardware and signal in the flash memory check mode
and flash memory clear mode, and the result of check
The result is announced by the buzzer beeps. The result of check is
printed.
Beeps
0 →No error
1 →Memory error
3. 15. RS232C check
The RS232C interface box is checked.
The result is printed after completion of check.
Press FUNCTION 9 8 7 STARTSTART
Press FUNCTION key.
Press key.
Press key.
Bit1 - 8 are set.
Soft SW-A2 - SW-M2 are set.
S F T SW-A1 = 1 0 0 0 0 0 0 0
S F T SW-A1 = 1 0 0 0 0 0 0 0
S F T SW-A1 = 1 0 0 0 0 0 0 0
S F T SW-A1 = 1 0 0 0 0 0 0 0
S F T SW-A2 = 0 0 0 0 0 0 0 0
S F T SW-M2 = 0 0 0 0 0 0 0 0
Press key during setting.
To finish the settings halfway between
SW-A1 and SW-M2, press the STOP
key. In this case, the setting being done
to the SW No. on display will be nullified
while settings done to the preceding
SW Nos. remain in effect.
The soft switch mode is terminated.
S F T SW-A1 = 0 0 0 0 0 0 0 0
START
DATA No. 1 2 3 4 5 6 7 8
When the COPY key is pressed, the
contents of soft switches are printed.
4. How to make soft switch setting
To enter the soft switch mode, make the following key entries in
sequence.
FO-1850TH
2 – 4

5. Soft switch description
•Soft switch
SW
NO. DATA NO. ITEM Switch setting and function Initial setting Remarks
10
SW
l
A1
1 Protect from echo No Yes 0
2 Forced 4800 BPS reception Yes No 0
3 Footer print Yes No 0
4 Length limitation of copy/send/receive No limit Copy/send: 1m
Receive: 1.5m 0
5 CSI transmission No transmitted Transmitted 0
6 DIS receive acknowledgement during G3
transmission Twice NSF: Once DIS: Twice 0
7 Non-modulated carrier for V29 transmission
modem Yes No 0
8 EOL detect timer 25s 13s 0
SW
l
A2
Modem speed V. 33 V. 17 V. 29 V. 27 ter
14400 12000 14400 12000 9600 7200 9600 7200 4800 2400
1 0011110000 1
2 1100000000 0
3 0101010110 0
4 0000111100 0
5 Sender’s information transmit No Yes 0
6 Reserved 0
7 Communication error treatment in RTN
sending mode (reception) No communication error Communication error 0
8 CNG transmission No Yes 0
SW
l
A3
CED tone signal interval 1000ms 750ms 500ms 75ms
1 No. 1 1 1 0 0 0
2 No. 2 1 0 1 0 0
3 MR coding No Yes 0
4 ECM mode No Yes 0 OPTION
5 ECM MMR mode No Yes 0
6 Reserved 0
7 Reserved 0
8 Reserved 0
SW
l
A4
1 Signal transmission level Binary input 0
2 No. = 16 8 4 2 1 0
3 123450
4 0 0 0 1 0 1
5 0
6 Protocol monitor (Error print) Printed at com. error Not printed 0
7 Protocol monitor Yes No 0
8 Line monitor Yes No 0
SW
l
A5
Digital line equalization setting (Reception) 7.2km 3.6km 1.8km 0km
1 No. 1 1 1 0 0 0
2 No. 2 1 0 1 0 1
Digital line equalization setting (Transmitter) 7.2km 3.6km 1.8km 0km
3 No. 3 1 1 0 0 0
4 No. 4 1 0 1 0 0
5 Reserved 0
6 Reserved 0
7 Error criterion 10 ~ 20% 5 ~ 10% 0
8 Anti junk fax check Yes No 0 OPTION
FO-1850TH
2 – 5

SW
NO. DATA NO. ITEM Switch setting and function Initial setting Remarks
10
SW
l
A6
1 Auto gain control (MODEM) Enable Disable 1
2 End Buzzer Yes No 1
3 Disconnect the line when DIS is received in
RX mode No Yes 1
4 Equalizer freeze control (MODEM) On Off 0
5 Equalizer freeze control 7200 BPS only No Yes 0
6 Reserved 0
7 Reserved 0
8 Reserved 0
SW
l
B1
1 Recall interval Binary input 0 OPTION
2 No. = 8 4 2 1 1
3 1234 0
4 0101 1
5 Recall times Binary input 0 OPTION
6 No. = 8 4 2 1 0
7 5678 1
8 0010 0
SW
l
B2
1 Dial pausing (sec/pause) 4sec 2sec 0
2 Reserved 0
3 Reserved 0
4 Reserved 0
5 Reserved 0
6 Reserved 0
7 Reserved 0
8 Reserved 0
SW
l
B3
1 Reserved 0
2 Reserved 0
3 Reserved 0
4 Reserved 0
5 Reserved 0
6 Reserved 0
7 Reserved 0
8 Reserved 0
SW
l
B4
1 Auto Dial Mode Delay timer of before line
connect 3sec 0sec 1
2 Auto Dial Mode Delay timer of after line
connect 3.6sec 3sec 0
3 Dial mode Tone Pulse 1 OPTION
4 Pulse →Tone change function by key Enable Disable 1
5 Dial pulse make/break ratio 40/60 33/67 1
6 Reserved 0
7 Reserved 0
8 Reserved 0
SW
l
B5
1 DTMF signal transmission level (Low) Binary input 0
2 No. = 16 8 4 2 1 1
3 123450
4 0 1 0 1 0 1
5 0
6 Reserved 0
7 Reserved 0
8 Reserved 0
FO-1850TH
2 – 6

SW
NO. DATA NO. ITEM Switch setting and function Initial setting Remarks
10
SW
l
B6
1 DTMF signal transmission level (High) Binary input 0
2 No. = 16 8 4 2 1 0
3 123451
4 001111
5 1
6 Reserved 0
7 Reserved 0
8 Reserved 0
SW
l
C1
Reading slice (Binary) Factory
setting Light Dark Darker in dark mode
1 No. 1 0 1 0 1 0
2 No. 2 0 0 1 1 0
Reading slice (Half tone) Factory
setting Light Dark Darker in dark mode
3 No. 3 0 1 0 1 0
4 No. 4 0 0 1 1 0
5 Line density selection Fine Standard 0 OPTION
6 Reserved 0
7 Reserved 0
8 Reserved 0
SW
l
D1
1 Number of rings for auto receive Binary input 0 OPTION
2 No. = 8 4 2 1 0
3 1234 0
4 0001 1
5 Automatic switching manual to auto receive
mode Reception after 5 rings No reception 0 OPTION
6 Reserved 0
7 Reserved 0
8 Reserved 0
SW
l
D2
1 Reserved 0
2 Reserved 0
3 Reserved 0
4 Distinctive ringing detection Yes No 0
5 Reserved 0
CI off detection timer (Distinctive ring
setting off only) 1200ms 1000ms 700ms 350ms
6 No. 6 0 1 0 1 0
7 No. 7 0 0 1 1 1
8 Reserved 0
SW
l
E1
1 Automatic switching mode Tel/Fax auto switch Switch to fax 0 OPTION
Pseudo ringing time at the phone/fax
automatic switching mode 15s 30s 60s 120s OPTION
2 No. 2 0 0 1 1 0
3 No. 3 0 1 0 1 0
4 Number of CNG signal detection at the
phone/fax automatic switching mode Twice Once 1
5 CNG detect time at TEL/FAX mode 3s 5s 0
6 Reserved 0
7 Post answer tone transmit in TEL/FAX mode No Yes 0
8 Reserved 0
FO-1850TH
2 – 7