Ricoh FAX220, FAX240 Service Manual

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RICOH FAX220/240

SERVICE MANUAL

Subject to change

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1. INTRODUCTION

1-1. General Specifications

Item Specification

Type Desktop transceiver Telephone Circuit PSTN/PBX Document Size Width: 148 - 218 mm

Length: 105 - 600 mm

Thickness: 0.05 - 0.15 mm Scanning Method Flat bed, CCD Scanning Width 216 ± 1 mm Effective Printing Width 210 mm (minimum) Scan Resolution Standard: 8 x 3.85 dots/mm

Detail: 8 x 7.7 dots/mm

Fine: 8 x 15.4 dots/mm Transmission Time FAX220 - 15 s (Measured using a CCITT #1 test chart,

Slerexe Letter, at 9,600 bps, MH coding with EFC,

10 ms/line I/O rate, standard resolution)

FAX240 - 11 s (Measured using a CCITT #1 test chart,

Slerexe Letter, at 9,600 bps, MMR coding with ECM, 10

ms/line I/O rate, standard resolution) Data Compression Method MH, EFC, SSC, MR, MMR* (*: FAX240 only) SAF Memory Capacity 128 kbytes (9 CCITT #1 test charts can be stored.) Modulation Method V29, V27ter, V21 Transmission Data Rate 9600/7200/4800/2400 bps (Automatic fallback) Protocol CCITT T.30 standard (NET 30) Printing Method Thermal printing Printer Paper Size 216 mm x 50 m roll Dimensions 355 x 454 x 203 mm Weight 4.6 kg Input Voltage H501-50, 51, 52, 53, 54, H502-50, 51, 52, 53, 54:

220 - 240 Vac, 50 Hz single phase

H501-55, H502-55: 120 Vac, 50/60 Hz, single phase Recommended Operating Environment Temperature: 17 - 28 °C

Humidity: 30 - 85 %RH

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1-2. Features LIst

Features FAX220 FAX240

Transmission

Automatic transmission yes yes Manual transmission yes yes ADF capacity 5 5 Automatic Contrast Control yes yes Polling transmission yes yes Send later yes yes Dial via dialpad yes yes Quick dial (one touch) 10 10 Speed dial (two touch) 40 40 Automatic redial yes yes Manual redial yes yes Label programming for Quick/Speed dials yes yes Page indicator CSI + P.1 yes yes Page indicator TTI + P.1 or P.1/10 yes yes Automatic page retransmission in normal tx mode no yes

Reception

Automatic reception yes yes Manual reception yes yes Polled reception yes yes Automatic cutter no yes Manual cutter yes no Authorized reception (with TSI) yes yes Decurler no yes Printing of the TSI on received copies yes yes

Communication

TTI (page header with name) yes yes RTI (own phone number or text) yes yes CSI (own phone number) yes yes Counters (user function) no no Voice request no no PD/DTMF change by switch yes yes Modified read (MR) yes yes ECM with MMR compression no yes

Compatibility

CCITT group 3 yes yes

Copy quality

Halftone (16 level) with image/text separation yes yes Auto shading yes yes MTF yes yes 8 x 15.4 lines/mm yes yes Automatic contrast (threshold) control yes yes

Reports

TCR yes yes Transmission Report yes yes Quick dial list yes yes Speed dial list yes yes Group dial list yes yes Error report yes yes

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Features FAX220 FAX240

Rejected Call Report in Authorized Reception yes yes Stored document list yes yes Power failure report no yes

SAF features (9 pages memory)

SAF capacity in kbytes

128 (256 if ECM

off) Memory transmission no yes Serial broadcasting no yes Substitute reception no yes Forwarding (1 number) no yes File confirmation/clearance no yes Automatic page retransmission in memory tx no yes (if ECM on) Remaining memory indication on LCD (during scanning) no yes Group dial no yes

Telephone features

Built-in handset yes yes On-hook dial yes yes Monitor speaker yes yes Music on hold yes yes Speakerphone no no AI Redial (last 5 numbers) yes yes 12 key dialpad yes yes Volume control for speaker yes yes Volume control for ringer yes yes Power down function (Ring, Dial, Speech) yes yes

FAX/PHONE switch

Auto receive/manual receive switch yes yes Auto answer delay time adjustment no no Automatic fax/tel switch yes yes Speech generation (AVM) yes yes

Interfaces

Telephone answering machine (TAM) interface yes yes PC interface no no

Others

Copy mode (normal, detail, fine, halftone) yes yes Time indicator yes yes Clock adjustment yes yes LCD display prompt yes yes LCD size 2 x 20 2 x 20 Battery backed-up RAM size in kbytes 32 32

Service features

Remote diagnostics yes yes Printer test pattern yes yes Bit switch setting yes yes ROM/RAM data display/list yes yes NCU parameter setting yes yes Pulse width setting no no Service report (last 10 errors) yes yes Service counters yes yes

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1-3. Detailed Features Description

1-3-1. Auto Select Mode

There are three reception modes, AUTO, TAM and FAX, one of which can be programmed in the Auto Select key on the operation panel using function 04 ‘‘SET FAX SWITCH’’. AUTO mode allows the machine to capture the line without any rings being heard by the users. Then, the machine starts to detect CNG for about 30 s while sending back ring-back tone or AVM (Artificial Voice Message) in one or two languages selected by the user. After that, it automatically receives the fax message or, if CNG is not detected, it calls the user by ringing from the speaker. TAM mode allows connection to telephone answering machines (TAM) connected on the same line. There are two types of TAM interface software used depending on the connection between the machine and the telephone answering machine. The first type of TAM interface is used in the countries where the TAM is connected to the machine as an external device. When the external device captures the line, the machine detects dc at the LIU. Then, the machine starts listening to the line. If the machine detects one or two CNG signals or a period of silence, the machine will capture the line and send CED/NSF/DIS to receive a fax message. The second type of TAM interface is prepared for the countries (e.g., Germany) where the machine is connected to the TAM as an external device. In this case, the machine cannot detect dc when the TAM goes off-hook. So, it monitors the ringing signal. After the programmed number of rings, the machine listens to the line for about 30 s. If the machine detects one or two CNG signals, the machine will capture the line and send CED/NSF/DIS to receive a fax message. With the second type of TAM interface, the machine cannot receive fax messages from machines which do not send a CNG.

FAX mode allows the machine to receive all incoming fax messages.

1-3-2. Authorized Reception

The machine automatically stores in RAM the TSI (or RTI) from the terminals programmed in the Quick Dials and Speed Dials, once the user sends a document to these terminals. Then, if Authorized Reception is switched on, the machine compares the TSI from the remote terminal with these TSIs memorized in the RAM, when the machine receives a fax call from any terminal. So, Authorized Reception prevents reception from terminals which are not programmed in the Quick/Speed Dials. If an unauthorized sender sends a fax message while this feature is switched on, the machine rejects the call and notifies the users by printing a rejection report with the unauthorized sender’s TSI or RTI.

1-3-3. Automatic Tx Speed Updating (AI Dial)

The machine memorizes the last five modem speeds that were used during transmission to the Forwarding terminal and each destination programmed in the Quick/Speed dials. Then, the machine chooses the most appropriate modem speed from the record for the next transmission, in order to reduce the time for modem rate fallback (approx. 5 s). This feature works only when the machine has more than two modem speed records fdor that destination. The modem speed is recorded in the memory if there are no error pages during transmission. This feature can work with other manufacturers’ terminals.

1-3-4. Page Retransmission in Normal Tx Mode - FAX240 only

In the normal transmission mode, the machine can retransmit failed pages as if in memory tx mode, if ECM is on. While sending the document, the machine backs up the document in the ECM memory in case page retransmission is needed. If the machine receives a negative code (RTN or PIN) after a page, the machine retransmits the whole page from the ECM memory.

1-3-5. Forwarding - FAX240 only

The machine can forward all received messages to the programmed Forwarding terminal. You can program the month, date and time for Forwarding to be switched on and for it to be switched off. Also, local printing of forwarded messages can be switched on and off.

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1-4. Exterior

1-4-1. Component Layout

1. Handset Cradle This contains a hook switch and a ringer.

2. Telephone Handset This contains a microphone and an earphone.

3. ADF Up to 5 pages can be fed automatically.

4. Operation Panel Refer to section 1-4-

5. Printer Cover/Cover Release Lever To open the cover, push the release lever forward and pull up the cover.

6. Copy Tray

7. Document Guide

8. Power Switch

9. Power Cord

10. Speaker Volume Control

11. Ringer Volume Control

12. Pulse/Tone Switch

13. GS/FS Switch … Not used

14. Telephone Jack

15. Line Jack

11 15 14

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1-4-2. Operation Panel

No. Name Function

Power indicator Lights when the power is switched on. Receive File indicator Lights when received messages are stored into memory because of a

printer problem. Up to 10 messages can be stored. Check Display indicator Lights when the machine has a problem. Replace Paper indicator Lights when the paper has been used up.

Function key and three softkeys

Press to access a function in the function list, and choose one of the soft

keys below the required instruction indicated on the LCD.

Quick Dial keys Each of these keys can be programmed with a telephone number and a

label.

Auto Select key and indicator If it is not lit, Tel (manual receive) mode is selected.

If it is lit, either FAX (automatic receive) mode, AUTO (automatic Tel/Fax

switch) mode, or TAM (Telephone Answering Machine) mode is selected,

depending on the mode selected with function 04. Resolution key and indicators Press this key to change the resolution. If neither of the Detail or Fine

indicators are lit, Standard resolution is selected. Halftone key and indicator Press this key when you wish to send a photograph. Speed Dial key Press this key to use a Speed Dial code. Pause/Redial key Press this key when you want to enter a pause in a telephone number, or

when you want to redial one of the last five numbers dialed. Clear key Press this during programming to erase the last character. ‘‘R’’(Recall) key* Press this key when you want to access the PSTN from behind a PBX

which requires the Flash Start method. Hold/On Hook Dial key and

indicator*

Press this key to dial without picking up the handset. Also, press this key to

place the other party on hold during a telephone conversation.

5 Dialpad* Dial using these keys and use to input characters during programming.

RICOH FAX 240

Receive File

Power

Check Display

Replace Paper

Function

A B

C D E

G H I J

Auto Select

Fine

Detail

Halftone

GHI

PRS

ABC

JKL

TUV

DEF

MNO

WXY

Memory

Stop

Copy

Start

Speed Dial

Pause Redial

Clear

DIAL NUMBER THEN INSERT DOCUMENT

11:22AM

Hold On Hook Dial

OPER

1 2

4 5 6

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No. Name Function

Memory key (FAX240 only) Press to use memory transmission. Stop key Press to stop the machine and return it to standby mode. Copy key Press to copy the document now in the feeder. Start key Press to start sending or receiving a fax message.

The keys with an asterisk (*) can be used for making a telephone call if the main power is switched off.

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2. PROGRAMMING, TESTING, AND PRINTING REPORTS

2-1. USER LEVEL PROGRAMMING

Function List

No. Function Brief Explanation

Quick Dial Programming Use to program a telephone number and a label in each Quick Dial

key.

Speed Dial Programming Use to program a telephone number and a label in each Speed Dial

code.

Telephone List Printing Use to print the telephone list, which contains Quick Dials, Speed

Dials, and Groups.

Set Fax Switch Use to select the function of Auto Select mode from among AUTO

mode (Auto Tel/Fax switch), TAM mode, and FAX mode (Automatic

Receive). 05 Send Later Use to program the machine to send a document at a later time. 06 Polling Transmission Use to set up a document to be polled from a remote terminal. 07 Polling Reception Use to program the machine to poll documents from remote terminals.

TCR Printing and On/Off Use to print a TCR or to set the machine up to print reception only on

the TCR. 09 Transmission Report On/Off Use to switch automatic Transmission Report output on or off. 10 Page Header (TTI) On/Off Use to switch the TTI printout on each transmitted page on or off. 11 Enter Page Header (TTI) Use to program the TTI. 12 Enter Your Name (RTI) Use to program the RTI. 13 Enter Your Fax Number (CSI) Use to program the CSI. 14 Clock Adjustment Use to adjust the date and time. 15 Set PBX Use to program the machine for the actual PBX type.

ID Code Programming Use to program the ID code, which is used for secured polling and the

closed network feature (closed network can only be switched on in

service mode). 17 Key Touch Tone On/Off Use to switch the key touch tone off or on.

RDS On/Off Use to switch RDS on or off.

This function cannot be accessed by the users, unless bit 6 of bit

switch 1 is set to 1 by RDS installation operation or by service later. 19 Set Language Use to change the LCD and report language.

Authorized Reception On/Off Use to prevent reception from terminals other than those programmed

in the Quick/Speed Dials. 21 Reviewing Stored Documents Use to review the documents stored in the memory.

Forwarding Use to program the machine to forward received messages to a

programmed terminal. 23 Group Dial Programming Use to make dialing groups (up to 5 groups can be made). 24 ECM On/Off Use this to switch ECM on or off.

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2-2. SERVICE LEVEL OPERATION

2-2-1. Entering and Exiting Service Mode

ENTERING SERVICE MODE

Press Start → Stop → Start → Stop → Start sequentially within 5 seconds.

After entering service mode, the following service functions are available.

No. Function Brief Explanation

Functions 30 to 38 are mainly prepared for factory use. 30 RAM Test Use to test the SRAM and DRAMs on the FCE. 31 Key Test Use to test all keys on the operation panel. 32 LED Test Use to test all LEDs on the operation panel. 33 LCD Test Use to test the LCD on the operation panel. 34 Speaker Test Use to test the monitor speaker. 35 Printer Test Use to print a test pattern. 36 PTT Test Use to test the modem signals, DTMF tones, and transmission level. 37 Frequency Test Use to generate signals of the desired frequency and level.

Burn-in Test Do not use this function. If this function is used, the RAM will all be

cleared.

The following functions are prepared for service use.

Factory Adjustment Use to check the ROM version, to adjust the tx level and to clear the

RAM. 41 Not used 42 Not used 43 Bit Switch Programming Use to change the bit switch settings. 44 Scanner Adjustment Mode Use to switch on the LED array for scanner adjustment. 91 Display ROM/RAM Data Use to display and change the ROM/RAM data. 92 Print System Report Use to print the system report. 93 Print ROM/RAM Data Use to print ROM/RAM data. 94 Not used 95 Print Service Report Use to print the service report. 96 Not used 97 Not used 98 NCU Parameter Programming Use to adjust the NCU parameters.

EXITING SERVICE LEVEL

Press Stop, Function, or EXIT at any time.

The machine will automatically exit service mode 40s after you enter it. Note: In the functions, the new settings will not be saved by pressing the Function key. To save the new set-

tings, you have to press ‘‘SET’’ or ‘‘OK’’, then exit the service mode.

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2-2-2. RAM Test (Function 30)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 30, then press SET.

3. The machine starts to check the SRAM and the two DRAMs without clearing any RAM data stored. If the RAM test succeeded, the machine prints ‘‘RAM TEST OK’’, and goes to the Key Test. If the RAM test failed, the machine displays ‘‘RAM ERROR AT ##AAAA’’ (## = type of RAM; AAAA = address) for 3 s, then ‘‘RAM TEST FAILED’’ is printed (Type of RAM: 09 = SRAM, 00 - DRAM0, 10 - DRAM1)

After this test, the machine automatically goes into function 31.

2-2-3. Key Test (Function 31)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 31, then press SET.

3. The display shows the name of a key. If the key is pressed the display shows the next one until the last key ‘‘J’’ is pressed. If the key test was successful, the machine prints ‘‘KEY TEST OK’’. If the key test was failed or aborted, the machine prints ‘‘KEY TEST FAILED. After this test, the machine automatically goes to the LED test.

Display Key Display Key Display Key

1 through # Keys in the

dialpad

ONL On Hook Dial CLR Clear

SPE Speed Dial FUN Function FIN Detail/Fine MLT Memory LEF Softkey (Left) STO Stop AUT Auto Select MID Softkey (Middle) CPY Copy RED Redial RIG Softkey (Right) STA Start HOL R PHO Halftone A through J Quick Dial keys

2-2-4. LED Test (Function 32)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 32, then press SET.

3. All the LEDs on the operation panel blink sequentially until OK or ERROR is pressed. If OK is pressed, the machine prints ‘‘LED TEST OK’’ and goes to the LCD test. If ERROR is pressed, the machine prints ‘‘LED TEST FAILED’’, and goes to the LCD test.

2-2-5. LCD Test (Function 33)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 33, then press SET.

3. The two lines on the LCD alternately show a line of solid black characters until OK or ERROR is pressed. If OK is pressed, the machine prints ‘‘LCD TEST OK’’ and goes to the Speaker Test. If ERROR is pressed, the machine prints ‘‘LCD TEST FAILED’’, and goes to the Speaker Test.

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2-2-6. Speaker Test (Function 34)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 34, then press SET.

3. The machine emits a tone from the speaker until OK or ERROR is pressed. If OK is pressed, the machine prints ‘‘VOL TEST OK’’ and goes to the Printer Test. If ERROR is pressed, the machine prints ‘‘VOL TEST FAILED’’ and goes to the Printer Test.

2-2-7. Printer Test (Function 35)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 35, then press PRINT.

3. A test pattern with diagonal lines is printed. After printing, the machine goes to standby mode.

2-2-8. PTT Test (Function 36)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 36, then press SET.

3. Press ‘‘MDM’’ for modem test, ‘‘DTMF’’ for DTMF test, or ‘‘LEV.’’ for tx level adjustment.

4.1 Modem Test The test starts from silence (the machine only goes off-hook), then by pressing the # key consecutively, the signal changes to 9,600bps - 7,200bps - 4,800bps - 2,400bps - 300bps - 600Hz - 1100Hz - 2100Hz. (Press the * key to go backwards through the sequence.) After you have finished the test, press Stop to go back to step 3.

4.2 DTMF Test Press a key on the dialpad (0 - 9, * and #) to test the DTMF signal. After you have finished the test, press Stop to go back to step 3. Note that the machine will emit a DTMF signal of the correct length for the country code, even if the slide switch on the rear of the machine is not set at ‘‘Tone’’. If you wish to get a continuous DTMF tone, set the slide switch at ‘‘Tone’’, switch off the power, then press the required key on the dialpad.

4.3 Tx Level Adjustment The current tx level setting is displayed in the upper right corner of the LCD. To change the setting, press # to increment or press * to decrement. After adjustment, press Stop to save the setting.

2-2-9. Frequency Test (Function 37)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 37, then press SET.

3. The machine emits a sine wave of the displayed frequency. The frequency can be changed in units of 100Hz by pressing # (increment) or * (decrement). Also, the output level can be changed by pressing LEV.

2-2-10. Burn-in Test (Function 38)

Do not use this function.

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2-2-11. Factory Adjustment (Function 40)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 40, then press SET. The upper line on the LCD shows the ROM version ‘‘VER x.xx dd.mm.yy c’’ (x.xx = version, dd.mm.yy = date, c = country setting). The lower line on the LCD shows ‘‘CLK 0.LEV RAMC’’.

3. Press RAMC for RAM clear.

4.1 Clock Oscillator Adjustment This function is not for service. WARNING: Do not use this function.

4.2 Tx Level Fine Adjustment This function is not for service. WARNING: Do not use this function.

4.3 RAM Clear RAM is all reset to the initial settings and the CPU is restarted. WARNING: With this function, all the previous settings will be reset to the initial settings for Hong Kong. Program the correct country code after clearing the RAM (bit switch 2; see section 3-1).

2-2-12. Bit Switch Programming (Function 43)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 43, then press SET.

3. The setting of bit switch 0 is displayed. To change the setting of a bit, press the bit number on the dialpad (0 - 7). Press < or > to display other bit switches.

4. To store the new setting, press OK.

Important Notice for Back-to-Back Mode (Bit Switch 0, Bit 7)

When in back-to-back mode, you cannot enter service mode unless you exit back-to-back mode first. This is because the machine starts communication if you press Start - Stop - and so on while you are in back-to-back mode. To exit back-to-back mode, do the following:

1. Make sure that the machine is not communicating.

2. Press Halftone to light the Halftone LED, then press Stop.

3. Enter the service mode.

4. After finishing with service mode, re-enter back-to-back mode if required.

2-2-13. Scanner Adjustment (Function 44)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 44, then press SET.

3. The LED array is switched on until ‘‘OK’’ is pressed. Refer to section 4-5 for more details on scanner adjustment.

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2-2-14. Display and Rewrite ROM/RAM Data (Function 91)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 91, then press SET.

3. The upper line on the LCD shows ‘‘ADD: aaaa VAL: ddd/hh’’ (aaaa = address, ddd = decimal value of the data, and hh = hexadecimal value of the data).

4. Select the address where the data you want to display or change is stored, using keys 0 through 9 and Quick Dial keys A through F, or using the * key to decrement the address and the # key to increment the address.

5. Press EDIT if you want to rewrite the data.

6. Rewrite the data in the hexadecimal data field. (The ‘‘<’’ and ‘‘>’’ keys are used to move the cursor in the data field.)

7. Press OK to save the new data.

8. Press Stop to exit this function or go back to step 3 to change another address.

2-2-15. System Report (Function 92)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 92, then press PRINT. The system report will be printed.

2-2-16. Print ROM/RAM Data (Function 93)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 93, then press SET.

3. Enter the start address then press OK. The address field has 5 digits, as the first digit is used for bank identification and the following 4 digits are for the actual address. Use the bank identification number ‘‘0’’ for addresses 0000 - 3FFF(H) and C000 - FFFF(H), and ‘‘9’’ for addresses 4000 - 7FFF(H).

4. Enter the end address then press OK. The machine prints a list of ROM/RAM data in the selected address range.

2-2-17. Service Report (Function 95)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 95, then press PRINT. The service report will be printed.

2-2-18. NCU Parameter Programming (Function 98)

1. Enter the service mode (see section 2-2-1).

2. Press Function, enter 98, then press SET.

3. The upper line on the LCD shows ‘‘ADD: aa VAL: ddd/hh’’ (aa = parameter number, ddd = decimal value of the data, and hh = hexadecimal value of the data).

4. Select the required parameter number with keys 0 through 9, or press # or * to scroll through the parameters.

5. Press EDIT if you want to change the data.

6. Rewrite the data in the decimal data field. (The ‘‘<’’ and ‘‘>’’ keys are used to switch the cursor between the address and data fields, and the * and # keys are used to decrement/increment the data value.) Refer to section 3-2-1 (address 0377 - 0381 (H)) for the definition of NCU parameters.

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3. SERVICE TABLES

3-1. BIT SWITCHES

WARNING

Do not adjust a bit switch that is described as "Not used", as this may cause the machine to

malfunction or to operate in a manner that is not accepted by local regulations.

Bit Switch 0

FUNCTION SETTINGS COMMENTS

0 Not used 1 Rx cable equalizer 0: Disabled

1: Enabled

Set this bit to 1 when there is a serious signal loss at higher frequencies during reception. The cable equalizer will amplify the signal in this range by +3 dBm.

2 DIS detections 0: Once

1: Twice

The machine will send DCS (G3 set-up signal) if it receives DIS. If echoes are frequent, setting this bit to 1 will allow the machine to wait for the second DIS before sending DCS.

3 TSI (RTI) printout on

received copies

0: Disabled 1: Enabled

If this bit is 1, the TSI or RTI received from the sender will be printed on the top of each page.

4 Burst error threshold/

error line ratio

0: 6 (12) [24] lines/10% 1: 3 (6) [12] lines/5%

If there are more consecutive error lines in the received page than the threshold specified by this bit, the page is rejected. Values in parenthesis ( ) are for Detail resolution, and those in square brackets [ ] are for Fine resolution. Also, if the number of error lines divided by the total number of lines reaches the ratio determined by this bit, the machine will send RTN to the other end. If you want to receive messages with fewer error lines, set this bit to 1.

5 Training error threshold 0: 4 bits

1: 1 bit

If the machine detects more errors during training than the number set by this bit, training fails and the machine will send FTT to ask the other terminal for modem rate shift-down. Set this bit to 1 if you want to receive messages at a more reliable modem speed.

6 Initial Rx modem rate 0: 9,600 bps

1: 4,800 bps

The setting of this bit is used to inform the sending machine of the initial starting modem rate for the machine in receive mode. If 9,600 bps presents a problem during reception, use 4,800 bps.

7 Back to back test 0: Disabled

1: Enabled

Set this bit to 1, when you want to test a back-toback communication.

Important Notice for Back-to-Back Mode

When in back-to-back mode, you cannot enter service mode unless you exit back-to-back mode first. This is because the machine starts communication if you press Start - Stop - and so on to enter service mode while you are still in back-to-back mode. Refer to the notice in section 2-2-12 for how to exit back-to-back mode.

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Bit Switch 1

FUNCTION SETTINGS COMMENTS

0 Reconstruction time for

the first line

0: 6 seconds 1: 10 seconds

When the sending terminal is controlled by a computer, there may be a delay in receiving page data after the local machine accepts set-up data and sends CFR. If this occurs, set this bit to 1 to give the sending machine more time to send data.

1 Substitute reception file

forwarding (FAX240 only)

0: Normal operation 1: Forward all files

Set this bit to 1 if the printer is out of order. The machine will forward all files to the Forwarding terminal.

2 ECM

transmission/reception (FAX240 only)

0: Enabled 1: Disabled

Set this bit to 1 when you want to switch off ECM.

3 PSTN/PBX dial tone and

busy tone detection

0: Enabled 1: Disabled

Set this bit to 1 when you wish to disable tone detection.

4 Closed network in

reception

0: Disabled 1: Enabled

Set these bits to 1 to switch on Closed Network. With Closed Network, communication will not go ahead if the ID code of the other terminal does not match the ID code of this terminal. The ID code has to be programmed with function 16 before switching on these bits. This feature may not be reliable when communicating with another maker’s machine.

5 Closed network in

transmission

0: Disabled 1: Enabled

6 Remote read/write request 0: Always enabled

1: User selectable

0: RDS is always enabled. The user cannot switch it off. 1: If a technician or RDS operator sets this to 1 after installation, the user can select either ‘‘ON for 24 hours’’ or ‘‘OFF’’.

7 Communication

parameter display and line monitoring after handshaking

0: Disabled 1: Enabled

This is a fault-finding aid. If this bit is set to 1, the LCD shows the key parameters (see below) and the speaker is enabled during message transmission and reception. This should be normally disabled because it cancels the CSI/TSI (RTI) display for the user.

Modem rate

(bps)

Sub-scan

resolution

(lines/mm)

Coding Width and

reduction

Mode I/O rate

(ms/line)

96: 9,600 72: 7,200 48: 4,800 24: 2,400

S: 3.85 D: 7.7 F: 15.4

1D: MH 2D: MR 1E: MH + EFC 2E: MR + EFC 1S: MH + SSC 2S: MR + SSC 1C: MH + ECM 2C: MR + ECM MC: MMR + ECM

A: A4 N: No reduction

DCS: CCITT G3 NSS: Non-standard G3

0M: 0 5M: 5 10M: 10 20M: 20 40M: 40

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Bit Switch 2

FUNCTION SETTINGS COMMENTS

0 Country code

Bit 4 3 2 1 0 Country 1 0 0 0 1 USA 1 0 1 0 0 Hong Kong 1 0 1 0 1 Australia 1 0 1 1 0 New Zealand 1 0 1 1 1 Israel 1 1 0 0 0 Thailand 1 1 0 0 1 Singapore 1 1 0 1 0 Indonesia

Set the country code after clearing the RAM.

1 2 3 4

5 TAM interface type 0: Normal

1: German type

0: The normal type of TAM interface monitors the line current on the LIU, to detect whether the external TAM goes off-hook or on-hook. 1: The German type of TAM interface does not monitor the line current on the LIU, because the TAM and the fax are connected in parallel to the line. Refer to section 1-3-1 for more details.

6 TAM (Telephone

Answering Machine) interface

0: Enabled 1: Disabled

If this bit is 1, TAM mode cannot be selected with function 04 by the user.

7 Not used

Default Settings

Bit Switch H501/502-50 H501/502-51 H501/502-52 H501/502-53 H501/502-54 H501/502-55

0 00 00 00 00 00 00 1 00 00 00 00 00 00 2 14 15 16 1A 17 11

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Page 18

3-2. USEFUL RAM ADDRESSES

In the equations that occur in the following tables, N represents the decimal value stored in the RAM address.

WARNING

Changing any RAM data that are not listed in this table may cause the machine to malfunction.

3-2-1. Address Table

Use service function 91 to view or adjust the contents of a RAM address. See section 2-2-14 for details.

Address (Hex) Function

0000 - 0002

Bit switches 00 to 02 (0000 = Bit switch 00, 0001 = Bit switch 01, and so on); refer to section 3-1 for details.

0009

User function parameters Bit 7: Transmission Report On/Off [Function 09] (1: On) Bit 6: TTI (Page Header) On/Off [Function 10] (1: On) Bit 5: Key Touch Tone On/Off [Function 17] (1: On) Bit 4: RDS On/Off [Function 18] (1: On for 24 hours) Bit 3: AM/PM Indication on LCD clock Note 1 (1: On) Bit 2: Forwarding On/Off [Function 22] Note 2 (1: On) Bit 1: Forwarding Mode [Function 22] Note 2 (0: Now or Later mode, 1: Daily mode) Bit 0: Forwarding File Local Printing On/Off [Function 22] (1: On)

000A

User function parameters Bit 7: Communication record listing on TCR [Function 08] (1: On) Bit 6: Authorized Reception On/Off [Function 20] (1: On) Bits 5 through 0: Not used

0039

Exchanger type connected to the machine Bit 2 = 0: PSTN

Bit 2 = 1: PBX

0300 - 0302: Line current detection parameters 0300 Line current detection time [Time = N x 10 (ms), detection disabled if N = FF] 0301 Line current reset time [Time = N x 20 (ms)] 0302 Line current dropout detection time [Time = N x 10 (ms)]

0303 - 0320: PSTN tone detection parameters

0303 - 030E

Modem data for PSTN dial tone frequency range

Caution: Do not adjust. 030F PSTN dial tone detection time [Time = N x 20 (ms), detection disabled if N = FF] 0310 PSTN dial tone reset time [Time = N x 0.16 (s)] 0311 PSTN dial tone continuous tone time [Time = N x 20 (ms)] 0312 PSTN dial tone permissible dropout time [Time = N x 20 (ms)] 0313 PSTN pause time [Time = N x 0.16 (s)] 0314 PSTN ringback tone detection time [Time = N x 20 (ms), detection disabled if N = FF]

0315 - 0320

Modem data for PSTN busy tone frequency range

Caution: Do not adjust.

0321 - 033E: PBX tone detection parameters

0321 - 032C

Modem data for PBX dial tone frequency range

Caution: Do not adjust.

032D PBX dial tone detection time [Time = N x 20 (ms), detection disabled if N = FF] 032E PBX dial tone reset time [Time = N x 0.16 (s)] 032F PBX dial tone continuous tone time [Time = N x 20 (ms)]

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Address (Hex) Function

0330 PBX dial tone permissible dropout time [Time = N x 20 (ms)] 0331 PBX pause time [Time = N x 0.16 (s)] 0332 PBX ringback tone detection time [Time = N x 20 (ms), detection disabled if N = FF]

0333 - 033E

Modem data for PBX busy tone frequency range Caution: Do not adjust.

033F - 0348: Busy tone detection parameters

033F Busy tone ON time (range 1) [Time = N x 10 (ms)]

0340 Busy tone OFF time (range 1) [Time = N x 10 (ms)] 0341 Busy tone ON time (range 2) [Time = N x 10 (ms)] 0342 Busy tone OFF time (range 2) [Time = N x 10 (ms)] 0343 Busy tone ON time (range 3) [Time = N x 10 (ms)] 0344 Busy tone OFF time (range 3) [Time = N x 10 (ms)] 0345 Busy tone ON time (range 4) [Time = N x 10 (ms)] 0346 Busy tone OFF time (range 4) [Time = N x 10 (ms)] 0347 Continuous busy tone detection time [Time = N x 10 (ms)]

0348

Bits 0 to 3: Busy tone signal state time tolerance (for all ranges) Bit 3 2 1 0 Tolerance 0 0 0 1 ± 50% 0 0 1 0 ± 25% 0 0 1 1 ± 12.5% Bits 4 to 7: Number of cycles required for detection

0349 - 0359: International dial tone detection parameters

0349 - 0354

Modem data for international dial tone frequency range

Caution: Do not adjust. 0355 International dial tone detection time [Time = N x 20 (ms), detection disabled if N = FF] 0356 International dial tone reset time [Time = N x 0.16 (s)] 0357 International dial tone continuous tone time [Time = N x 20 (ms)] 0358 International dial tone permissible dropout time [Time = N x 20 (ms)] 0359 International dial pause time [Time = N x 0.16 (s)]

035A - 036A: National dial tone detection parameters

035A - 0365

Modem data for domestic dial tone frequency range

Caution: Do not adjust. 0366 National dial tone detection time [Time = N x 20 (ms), detection disabled if N = FF] 0367 National dial tone reset time [Time = N x 0.16 (s)] 0368 National dial tone continuous tone time [Time = N x 20 (ms)] 0369 National dial tone permissible dropout time [Time = N x 20 (ms)]

036A National dial pause time [Time = N x 0.16 (s)]

036B - 036C

International dial access number

Example: If the number is 100, store F1 in address 036B, and 00 in address 036C.

036D PBX operator pause [Time = N x 20 (ms)] 036F CCITT T1 time [Time = N x 2.56 (s)]

0370 Maximum number of dialing attempts to the same station in normal tx mode 0371 Redial interval in normal tx [Time = N (minutes)] 0372 Maximum number of dialing attempts to the same station in memory tx mode 0373 Interval between dialing to different stations [Time = N x 2.56 (s)] 0374 Dial tone detection level [Level = 0 - N x 0.375 (dBm)] 0375 Busy tone detection level [Level = 0 - N x 0.375 (dBm)]

0376

Minimum signal detection level [Level = 0 - N x 0.375 (dBm)]

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Page 20

Address (Hex) Function

0377 - 037B: Ringing signal detection parameters (Use function 98 to change)

0377

NCU Parameter 00: Acceptable ringing signal frequency, upper limit [Frequency = 1/(N x 10-3) (Hz)]

0378

NCU parameter 01: Acceptable ringing signal frequency, lower limit [Frequency = 1/(N x 10-3) (Hz)]

0379 NCU parameter 02: Number of rings until a call is detected [Number = N x 1] 037A NCU parameter 03: Minimum required length of a ring [Length = 20 x N (ms)] 037B NCU parameter 04: Minimum required length of an interval between rings [Length = 40 x N (ms)]

037C - 037D: Pulse dial parameters (Use function 98 to change) 037C NCU parameter 05: Time between closing the dc loop and the first dialed digit [Time = N (ms)] 037D NCU parameter 06: Pause between dialed digits (pulse dial mode) [Time = N x 20 (ms)]

037E

NCU parameter 07: Time waited when a pause is entered at the operation panel [Time = N x 20 (ms)]

037F - 0380: Tone dial parameters (Use function 98 to change)

037F NCU parameter 08: DTMF tone length [Time = N x 5 + 60 (ms)]

0380 NCU parameter 09: Time between dialed digits (DTMF dial mode) [Time = N x 5 + 60 (ms)] 0381 NCU parameter 10: Modem transmission level [Level = - N (dBm)]

0382

Language selected for LCDs and reports 0(D): English 1(D): Spanish 3(D): French

0386 Redial interval for memory transmission [ N x 1 (min.)] (Default: 5 minutes)

0387 - 0388 Intercity access code for France: 16(D) [0386 = FF(H), 0387 = 16(BCD)]

039A

Ringing time in Auto mode [Time = N (s)] The value of N should be a multiple of 5 between 5 and 25.

039E - 03A1: CNG detection parameters 039E Maximum acceptable CNG OFF-time [Time = N x 20 (ms)] Note 3 039F Minimum acceptable CNG OFF-time [Time = N x 20 (ms)] Note 3 03A0 Maximum acceptable CNG ON-time [Time = N x 20 (ms)] Note 3 03A1 Minimum acceptable CNG ON-time [Time = N x 20 (ms)] Note 3

03A2

Country code 11: USA 14: Hong Kong 15: Australia 16: New Zealand 17: Israel 18: Thailand 19: Singapore 1A: Indonesia

03C5

Mode selection in Auto Select mode Bit 3 2 1 0 Mode 0 0 0 1 Auto Tel/Fax switch with AVM 0 0 1 0 Auto Tel/Fax switch with ringback tone 0 0 1 1 Semi-Auto (TAM) mode 0 1 0 0 Fax mode

03C9 Continuous silent period detection time in TAM mode [Time = N x 65 (ms)]. See Note 4.

03CA PSTN access code from behind Loop Start PBX (BCD) 03CF Number of rings until a call is detected in TAM mode [N (times)]

20A1 Forwarding start date and time Minute (BCD) 20A2 Forwarding start date and time Hour (BCD) 20A3 Not used 20A4 Forwarding start date and time Day (BCD) 20A5 Forwarding start date and time Month (BCD) 20A6 Forwarding start date and time Year (BCD) 20A7 Forwarding end date and time Minute (BCD) 20A8 Forwarding end date and time Hour (BCD) 20A9 Not used

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Address (Hex) Function

20AA Forwarding end date and time Day (BCD) 20AB Forwarding end date and time Month (BCD) 20AC Forwarding end date and time Year (BCD)

20AD - 226E TCR generation area (30 bytes x 15 communications)

2272 - 2433 Service report and error report generation area (45 bytes x 10 communications)

2438 - 24F7 Error code memory (up to 32 codes x 6 bytes)

2736 - 2737

Polling ID code Example: ABCD 2736 (High) = A, (Low) = B

2737 (High) = C, (Low) = D

2A7B Received page counter High: Tens digit Low: Units digit

(BCD) High: Thousands digit Low: Hundreds digit

High: Hundred thousands digit Low: Ten thousands digit

2A7C 2A7D

2A7E - 2A80 Transmitted page counter (Refer to the received page counter)

2A81 Printed page counter High: Tens digit Low: Units digit

(BCD) High: Thousands digit Low: Hundreds digit

High: Hundred thousands digit Low: Ten thousands digit

2A82 2A83

2A84 - 2A86 Scanned page counter (Refer to the printed page counter)

5002 - 5100

Modem rates used in the last five communications to the terminals programmed in the Quick/Speed dials and to the forwarding terminal. (5 bytes x 51 destinations) [0: No history, 1: 2400 bps, 2: 4800 bps, 3: 7200 bps, 4: 9600 bps]

5101 Number of characters in the RTI - 14 (H)

5102 - 5115 RTI (ASCII)

5116 Number of characters in the CSI - 14 (H)

5117 - 512A CSI (ASCII)

512B Number of characters in the TTI - 20(H)

512C - 514B TTI (ASCII)

514C Number of digits in the forwarding terminal’s telephone number

514D - 516C Forwarding terminal’s telephone number (ASCII)

63F6

Continuous silent period detection time in TAM mode indicated on the LCD [Time = N (s)]. See Note 4.

6408

AVM language in AUTO and TAM modes. 1(D): English 2(D): German 3(D): Dutch 4(D): French

6409 Second AVM language in AUTO and TAM modes. (Same as above)

ROM Version •

The following addresses are ROM addresses. The data in these addresses cannot be changed. C00C Version (High) (ASCII) C00D A period ‘‘ . ’’ (ASCII) C00E Version (Low) (ASCII) C00F Version (Low) (ASCII)

C010 A blank space ‘‘ ’’ (ASCII) C011 Day (Tens digit) (ASCII) C012 Day (Units digit) (ASCII) C013 A period ‘‘ . ’’ (ASCII) C014 Month (Tens digit) (ASCII) C015 Month (Units digit) (ASCII) C016 A period ‘‘ . ’’ (ASCII) C017 Year (Tens digit) (ASCII) C018 Year (Units digit) (ASCII) C019 A blank space ‘‘ ’’ (ASCII)

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Address (Hex) Function

C01A Hour (Tens digit) (ASCII) C01B Hour (Units digit) (ASCII) C01C A colon ‘‘:’’ (ASCII) C01D Minute (Tens digit) (ASCII) C01E Minute (Units digit) (ASCII) C01F A blank space ‘‘ ’’ (ASCII)

C020 Suffix (ASCII) C021 Machine code 13 (H) - FAX 220/240

Notes:

1. This bit only changes the language displayed on the LCD. The report language cannot be changed.

2. Forwarding requires the following switches and data.

ON/OFF

Bit 2 of 0009 (H)

Mode

Bit 1 of 0009 (H)

Start Date and Time

20A1 - 20A6 (H)

End Date and Time

20A7 - 20AC (H)

OFF

(0)

(1)

NOW (0) Current date and time is stored. End time and date is stored

here (user programmable). If ‘‘UNDEFINED’’ is selected, the start date and time is copied here.

LATER (0)

Start date and time is stored here (user programmable).

DAILY (1)

The daily start time is stored here.

The daily end time is stored here.

3. These addresses are cleared if the power is switched off.

4. If you change RAM address 63F6, you must also change RAM address 03C9, and vice versa.

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Page 23

3-2-2. Format of the TCR and Transmission Report Generation Areas

The TCR and the Transmission Report are generated in addresses 20AD - 226E (H). The record of each communication is stored in blocks of 30 bytes as explained in the following table.

Byte No. Functions

Header Bit 7: Transmission Report (1: Enabled)

Bit 6: TCR (1: Enabled)

Bits 5 through 0: Not used 1 Communication start time Month (BCD) 2 Communication start time Day (BCD) 3 Communication start time Hour (BCD) 4 Communication start time Minute (BCD)

5 - 24 Remote terminal’s RTI, TSI or CSI (ASCII)

Communication mode Bit 7: Resolution step down (1: Yes) Bit 6: Reduction (1: Yes) Bit 5: 0: Standard 0: Fine 1: Detail 1: Not used 4 0 1 0 1 Bit 3: Forwarding (1: On) Bit 2: Memory tx/rx (1: Yes) Bit 1: ECM (0: Non-ECM, 1: ECM)

Bit 0: Tx or Rx (0: Rx, 1: Tx) 26 Communication time Minutes (BCD) 27 Communication time Seconds (BCD)

Communication result and causes of error

Bit 7: Result (0: OK, 1: Error)

Bit 6: Document jam (1: Yes)

Bit 5: Authorized reception (0: Not rejected, 1: Rejected)

Bit 4: Not used

Bit 3 - 0: Cause of error (BCD)

7 (BCD): Not used 6 (BCD): 5 (BCD): 8 minutes close 4 (BCD): Busy 3 (BCD): T1 time over during a telephone call 2 (BCD): T1 time over during a fax call 1 (BCD): Errors during fax communication 0 (BCD): No error

29 Total page(s) (BCD)

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Page 24

3-2-3. Format of the Service Report and Error Report Generation Area

The Service Report and the Error Report are generated in addresses 2272 - 2433 (H). The record of each error communication is stored in blocks of 45 bytes as explained in the following table. There can be up to 10 records.

Byte No. Functions

Header Bit 7: Service Report or Error Report (1: Enabled)

Bit 6 through 0: Not used

1 - 29 Same as the TCR memory

30 Error page #1 (BCD) 31 Error page #2 (BCD) 32 Error page #3 (BCD) 33 Error page #4 (BCD) 34 Error page #5 (BCD) 35 Error code #1 (High) (BCD) 36 Error code #1 (Low) (BCD) 37 Error code #2 (High) (BCD) 38 Error code #2 (Low) (BCD) 39 Error code #3 (High) (BCD) 40 Error code #3 (Low) (BCD) 41 Error code #4 (High) (BCD) 42 Error code #4 (Low) (BCD) 43 Error code #5 (High) (BCD) 44 Error code #5 (Low) (BCD)

3-2-4. Format of the Error Code Memory

The error codes are stored in 2438 - 24F7 (H). Each error code is stored in blocks of 6 bytes as explained in the following table. The machine can store up to 32 error codes.

Byte No. Functions

0 Error code (High) (BCD) 1 Error code (Low) (BCD) 2 Month (BCD) 3 Day (BCD) 4 Hour (BCD) 5 Minute (BCD)

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Page 25

3-3. JUMPERS

LIU

TB1

TB2

1 TB3

TB4

The jumper wires are set as shown below in the factory for each version. WARNING: Service parts for types 1, 4, and 6 are set to type 6, and service parts for types 2 and

3 are set to type 2. When installing a new LIU, make sure that it is at the correct setting for the machine. Also, note that the LIU for type 2 has a dummy jumper on pin 4 of TB3; this is a spare jumper for use if you wish to install the LIU board in a type 3 machine.

TB1

TB2

1 TB3

TB4

TB1

TB2

1 TB3

TB4

TB1

TB2

1 TB3

TB4

TB1

TB2

1 TB3

TB4

TB1

TB2

1 TB3

TB4

H501/502-50

(Type 1)

H501/502-52

(Type 3)

H501/502-53

(Type 4)

H501/502-54

(Type 5)

H501/502-55

(Type 6)

TB1

TB2

1 TB3

TB4

H501/502-51

(Type 2)

Dummy Jumper

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Page 26

3-4. VARIABLE RESISTORS AND SWITCHES

PCB Address Function

LIU

VR1 Ringer volume adjustment (user adjustable) VR2 Speaker volume adjustment (user adjustable) VR3 DTMF signal Tx level adjustment

SW1 GS/FS select switch (not used)

PSU S001

A thermostat; this switches the power off automatically when the temperature goes higher than 95 ± 5 °C, and recovers after switching the power switch off and on

3-5. SENSORS

No. Name Function

SB-1

Document Sensor Detects whether a document is placed in the feeder or not. The 58th bit on

the SBU is used as this sensor.

SB-2

Scan Line Sensor Detects when the top of a page is at the scan line position. The 4th bit on

the SBU is used as this sensor. SB-4 Paper End Sensor Detects whether paper is in the paper holder or not. SB-5 Paper Jam Sensor Detects whether paper is jammed in the printer or not. SB-7 Cutter Start Sensor Detects whether the cutter blade is at the home (start) position or not.

SB-8

Cutter End Sensor Detects whether the cutter blade is at the end position or not. If the cutter

blade is detected at the cutter end position, the cutter motor reverses to

move the blade to the cutter start position.

SB-10 Cover Sensor Detects whether the printer cover is closed or not.

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Page 27

4. REMOVAL AND ADJUSTMENT

CAUTION

1.Unplug the machine from the power outlet before removing any of the covers.

2. The danger of explosion exists if the lithium battery on the FDU is incorrectly replaced. Replace

only with the same or an equivalent type recommended by the manufacturer. Discard used batteries

in accordance with the manufacturer’s instructions.

4-1. COVERS

4-1-1. Operation Panel Assembly

1. Open the ADF.

2. Remove the operation panel cover [A] as shown below.

3. Disconnect three connectors.

4. Remove the lower cover [B] (1 ground wire).

[A]

[B]

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Page 28

4-1-2. Paper Holder and Scanner Cover

1. Open the printer cover.

2. Remove the paper holder [A] (4 screws, 1 connector).

3. Remove the operation panel assembly (see section 4-1-1).

4. Remove the scanner cover [B] with a screwdriver as shown below (2 screws).

[A]

[B]

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Page 29

4-1-3. Thermal Head and Printer Cover

1. Open the printer cover.

2. Remove the thermal head cover [A] (4 screws).

3. Remove the thermal head [B] and the spring plate [C] (2 connectors, 2 springs, 2 screws).

Reassembly Note

• The dents on the thermal head bracket must fit into the slots on the thermal head.

4. Remove the printer cover [D] (2 screws).

[D]

[A]

[C]

[B]

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4-2. SCANNER

4-2-1. Separation Rubber Plate

1. Remove the operation panel assembly (see section 4-1-1).

2. Remove the rubber plate [A].

4-2-2. LED Array

1. Remove the operation panel assembly, the paper holder and the scanner cover (see section 4-1).

2. Remove the LED array [A] (2 screws, 1 connector).

[A]

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4-2-3. Feed Roller

1. Remove the operation panel assembly, the paper holder and the scanner cover (see section 4-1).

2. Remove the metal bracket [A] (1 screw).

3. Remove the feed roller [B].

Note for Reassembly

• Pin [C] on the document sensor actuator must be under the feed roller shaft.

[A]

[B]

[C]

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4-3. PRINTER

4-3-1. Rear Cover, Cutter Unit (FAX240 only), and Platen Roller

1. Remove the rear cover [A] (2 screws).

2. Remove the paper guide bracket [B] (FAX220), or the paper holder and the cutter unit [C] (FAX240) (4 screws, 2 connectors).

[C]

[A]

FAX240

[B]

FAX220

[A]

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Page 33

3. Remove the FCE, FDU, PSU and LIU (see section 4-4).

4. Remove the mono-chassis [D] (2 screws, 1 ground wire).

5. Remove two gears [E] (1 E-ring).

6. FAX220: Remove the platen roller [F] (2 E-rings, 2 bushings). FAX240: Remove the decurler bracket [G] and platen roller [F] (2 E-rings, 2 bushings, 1 spring).

Reassembly Note

• Be careful not to assemble the gears the wrong way round.

• The left platen roller bushing is smaller than right bushing.

• FAX240: Lubricate the left shaft of the platen roller all the way round after changing the platen roller or the

spring clutch for the decurler (Use Mobil Temp 78, part no. 54479078).

[D]

[E]

[F]

FAX220

[G]

[D]

[E]

[F]

FAX240

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Page 34

4-4. PCBs

4-4-1. FCE, FDU, and PSU

1. Remove the paper holder (see section 4-1-2).

2. Remove the FCE [A] (3 connectors).

3. Remove the FDU [B] (9 connectors).

4. Remove the rear cover (2 screws).

5. Remove the PSU [C] (2 connectors).

[A]

[B]

[C]

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4-4-2. LIU

1. Remove the paper holder and the scanner cover (see section 4-1-2).

2. Remove the LIU [A] (2 screws, 6 connectors).

4-4-3. HSB

1. Remove the paper holder (see section 4-1).

2. Remove the cradle unit as shown below.

3. Remove the HSB [A] (3 connectors).

[A]

(1)

(2)

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4-4-4. OPU

1. Remove the operation panel cover (see section 4-1-1).

2. Remove the OPU [A].

[A]

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4-5. SBU REPLACEMENT AND SCANNER/SENSOR ADJUSTMENT

4-5-1. SBU Adjustment Tools

1. Adjustment Kit (P/No. H0809600)

2. Test PCB (P/No. H0939650) Additionally, the test chart which is included in the adjustment kit is available as part number H0809602.

4-5-2. SBU Replacement

1. Unplug the machine from the wall outlet.

2. Remove the printer cover, operation panel assembly, and scanner cover (see sections 2-1 and 2-3).

3. Remove the SBU (2 screws, 1 connector at CN7 on the FDU).

4-5-3. Scanner/Sensor Adjustment

Every time you replace the SBU or when the machine has a document non-feed or jam problem because of incorrect scanner/sensor adjustment, adjust the scanner/sensor mechanism as shown in the following pages.

As the scanner has 2 features, scanning document and detecting sensor actuator movement, the scanner needs exact adjustment. Refer to Appendix D for more details on the scanner/sensor mechanism.

This section is divided into 4 parts:

1. Preparation

2. Horizontal Scan Line Adjustment

3. Vertical Scan Line Adjustment

4. Focusing

‘‘Preparation’’ explains how to set up the SBU adjustment tools in the machine. ‘‘Horizontal Scan Line Adjustment ’’ explains how to adjust the horizontal position of the SBU with the tools.

This section is quite important because the machine cannot detect sensor movement unless the SBU is adjusted properly.

‘‘Vertical Scan Line Adjustment ’’ explains how to adjust the vertical position of the SBU with the tools. The new test chart is designed so that the SBU can be adjusted vertically.

‘‘Focusing’’ explains how to adjust focusing on the CCD. Adjusting the lens position is a bit more difficult than for other current models.

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1. Preparation

1. Install a new SBU in the machine. (Do not connect the harness to the FDU.)

2. Clamp the bracket to the scanner base. Set the left side of the bracket first as shown below.

Notes:

3. Connect the harness from the FDU (CN7) to CN2 on the test PCB, then connect the harness from the test PCB to the SBU.

1. The dents on the bracket must be fit to the edge of scanner base. Otherwise, the pins of the HIC might crack as shown in the diagram.

2. The shape of the bracket might be different from the drawing.

SBU

2nd Mirror

CN3

1 2

CN2

CN1

FDU

CN7

SBU

COM2

(Ground)

XVIDEO

(CH2)

DTVLD

(CH1)

Scanner Base

HIC

FDU

Bracket

Crack

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Page 39

1. Preparation

4. Connect the test pins to the oscilloscope as follows: Pin 1 (DTVLD) - Channel 1 (CH1) on the oscilloscope Pin 2 (COM2) - Ground Pin 3 (XVIDEO) - Channel 2 (CH2) on the oscilloscope

5. Attach the test chart to the machine.

6. Connect the operation panel to the machine.

7. Enter the service mode and switch the LED array on (see section 2-2-13).

8. Set up the oscilloscope as follows: CH2 (XVIDEO) - 0.2 V/div. TIME - 1 ms/div. Then, select CH2 (XVIDEO) on the oscilloscope.

9. The XVIDEO signal shows one of the waveforms shown below. One, two or three dropouts should appear at ‘‘A’’ and ‘‘B’’ depending on the vertical scan line position, and moire should appear at ‘‘C’’. If this waveform cannot be seen on the oscilloscope screen, loosen the SBU securing screws and adjust the SBU position until this waveform appears on the screen. The moire sometimes does not appear on the screen unless the lens is well focused. So, if the moire does not appear on the screen, go to the ‘‘Focusing’’ procedure first, then go to the ‘‘Horizontal/Vertical Scan Line Adjustment’’ procedures. If this waveform appears on the screen, go to the ‘‘Horizontal/Vertical Scan Line Adjustment ’’ procedures, then check that the moire at ‘‘C’’ satisfies the criterion in the ‘‘Focusing’’ section.

Test Chart attached on the Pressure Plate

Scan Start Line "A" part

"B" part

"C"(8 lines/mm) part

"A" "B" part Scan Line

2 dropouts

3 dropouts

1 dropout

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Page 40

2. Horizontal Scan Line Adjustment

1. Set up the oscilloscope as follows: CH1 (DTVLD) - 5 V/div. CH2 (XVIDEO) - 0.2 V/div. TIME - 1 ms/div. Use ALT mode to display CH1 and CH2 at the same time.

2. Loosen the SBU securing screws.

3. The XVIDEO signal shows one of the waveforms shown below.

4. Enlarge the shaded part of the waveform above by changing the TIME scale to 50 µs/div or 20 µs/div. The scan start line appears as the first sharp dropout from the left of the XVIDEO signal on the oscilloscope. The dropout of the waveform has to be within ±4 bits from the rising edge of the DTVLD signal as shown below.

If the scan start line is not at the correct position, go to step 5 to adjust the horizontal scan line position.

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Page 41

2. Horizontal Scan Line Adjustment

5. Adjust the horizontal scan line position as shown below. If the scan start line is to the left of the rising edge of the DTVLD signal, move the SBU to the left.

If the scan start line is to the right of the rising edge of the DTVLD signal, move the SBU to the right.

6. After adjustment, be sure that the scan start line is within ± 4 bits from the rising edge of the DTVLD signal, then go to the ‘‘Vertical Scan Line Adjustment ’’ procedure.

Note: Scan end line adjustment is not necessary.

4-15

Page 42

3. Vertical Scan Line Adjustment

1. Set up the oscilloscope as follows: CH1 (DTVLD) - 5 V/div. CH2 (XVIDEO) - 0.2 V/div., not inverted TIME - 1 ms/div. Use ALT mode to display CH1 and CH2 at the same time.

2. The XVIDEO signal shows one of the waveforms shown below. At ‘‘A’’ and ‘‘B’’ on the XVIDEO waveform, one, two or three dropouts are seen now.

Enlarge areas ‘‘A’’ and ‘‘B’’ by changing the time scale to 50 µs/div or 20 µs/div. The ideal waveform should have only one dropout at each of ‘‘A’’ and ‘‘B’’. If the waveform has two or three dropouts there, go to step 3 to adjust the ‘‘A’’ part (scan start side) and/or step 4 to adjust the ‘‘B’’ part (scan end side).

4-16

Page 43

3. Vertical Scan Line Adjustment

3. Adjustment at the scan start side. If the waveform has two dropouts at the scan start side, move down the left side of the SBU to make the distance between peaks narrower. The distance between peaks has to be within 50 µs.

If the waveform has three dropouts at the scan start side, move up the left side of the SBU to make the distance between peaks narrower. The distance between peaks has to be within 50 µs.

4-17

Page 44

3. Vertical Scan Line Adjustment

4. Adjustment at the scan end side. If the waveform has two dropouts at the scan end side, move down the right side of the SBU to make the distance between peaks narrower. The distance between peaks has to be within 50 µs.

If the waveform has three dropouts at the scan end side, move up the right side of the SBU to make the distance between peaks narrower. The distance between peaks has to be within 50 µs.

5. After adjusting the scan end side, confirm that the scan start side is still adjusted properly, as the adjustment at one side often changes the waveform at the other side.

4-18

Page 45

4. Focusing

1. Loosen the lens securing screw [A] and pull out the lens 1 or 2 mm from the scanner base surface as shown on the right.

2. Move back the lens using a small (-) screwdriver so that the amplitude of each moire [A] becomes more than 20% of the white level output [B].

3. Tighten the lens securing screw.

After finishing the adjustments, switch off the power, take out the adjustment tools, bracket, test lead and the white pressure plate from the machine. Then reassemble the machine.

4-19

Page 46

5. TROUBLESHOOTING

5-1. COPY QUALITY PROBLEMS

5-1-1. Received Copies

If there is no fault in the receiving terminal or on the line, but the copy quality is bad, do the following:

• Check that the thermal head, platen roller and spring plate assembly are assembled completely.

• Clean the thermal head (soft cloth and alcohol).

• Replace the thermal head or FDU.

5-1-2. Printouts Made in Copy Mode

If printouts of received fax messages are OK but printouts made using copy mode are not, the following faults must be considered in addition to the printer faults mentioned above.

Symptom Remedies

Blank or black copies • Check the scanner/sensor mechanism and adjust or replace any

defective parts.

• Replace the SBU or FDU.

Vertical black lines on the copy • Clean the scanner optics and LED array (soft cloth).

• Replace the SBU if there are any sharp peaks or dropouts in the CCD waveform.

Uneven density • Adjust the scan line position (see section 4-5-3).

• Clean the scanner optics and LED array (soft cloth).

• Replace the LED array if it is defective.

Magnification • Check that the mirrors are assembled correctly on the scanner base. Blurred characters • Adjust the focusing (see section 4-5-3). Filled-in characters • Adjust the focusing (see section 4-5-3). Side-to-side registration error • Adjust the scan start position (see section 4-5-3). One side darker than the other • Adjust the CCD waveform flatness (see section 4-5-3).

• Check the LED array; replace it if it is defective.

Image only partially scanned • Adjust the scan line position and/or scan start position

(see section 4-5-3).

5-1

Page 47

5-1-3. Effects of Line Problems on Copy Quality

Missing lines; shrinkage in the sub scan direction

- Original - - Bad Copy Sample -

Cut off

- Bad Copy Sample -

Some lines may be missing just before the cut off.

5-2. MACHINE OPERATION

Use the following procedures while referring to the point-to-point diagram and signal tables. The procedures may not be exhaustive, but they may help you to solve the problem.

5-2-1. Scanner/Document Feeder

1. Non-feed

Test Action if Yes Action if No

1. Is the scanner cover closed properly?

2. Was the document placed in the feeder correctly? Was the document of a recommended type?

3. Is the document fed into scanner after you place it in the ADF ?

Finished. Go to test 4.

4. Does the document sensor actuator move correctly. Go to test 5. Reassemble or replace the

actuator. Go back to test 3.

5. Do the two red LEDs on the left hand side of the LED array light correctly, without a document in the feeder ?

Go to step 8. Go to step 6.

6. Check the +5V output from the FDU. Is the output correct ?

Replace the LED array, then go back to test 3

Go to step 7.

7. Does the PSU output +24V? Check the PSU-FDU

connection or replace the FDU.

If the wall socket is good, replace the PSU.

5-2

Page 48

Test Action if Yes Action if No

8. Is the scan start line of the SBU adjusted properly? Go to step 9. Adjust the scan start position.

9. Check the connection to the tx motor. Does the

FDU both: a) output +24V to the tx motor, b) output stepper motor drive phase signals to the motor?

Replace the FCE. Replace the FDU.

2. Double Feed

Test Action if Yes Action if No

1. Was the document placed in the feeder carefully and in the correct manner?

2. Clean or replace the separation rubber plate.

3. Is the operation panel closed at each side ?

3. Jam

Test Action if Yes Action if No

1. Check that the document is not curled seriously or not longer than 600 mm.

2. Clean the rollers in the feeder/scanner with a soft cloth and water.

3. Check for blockages in the document feed path. Check the scanner drive mechanism.

4. Does the scan line sensor actuator move correctly ? Go to test 5. Reassemble or replace the actuator.

5. Do the two red LEDs on the left hand side of the

LED array light correctly, without a document in the feeder ?

Go to step 8. Go to step 6.

6. Does the FDU output +5V output correctly ? Replace the LED array. Go to step 7.

7. Does the PSU output +24V? Check the PSU-FDU

connection or replace the FDU.

If the wall socket is good, replace the PSU.

8. Does the CCD on the SBU have defective ele-

ments in the scan line sensor detection part ?

Replace the SBU. Replace the FCE.

4. Skew

Test Action if Yes Action if No

1. Clean the rollers in the feeder/scanner with a soft cloth and water.

2. Clean or replace the separation rubber plate.

3. Is the operation panel closed at each side ?

5. Dirty Document

Test Action if Yes Action if No

1. Clean the rollers in the feeder/scanner with a soft cloth and water.

5-3

Page 49

5-2-2. Printer

1. Non Feed

Symptom: Non feed

Check Action if Yes Action if No

1. Is the printer jammed with debris?

Clear the debris. Go to step 2.

2. Is the printer cover closed properly?

Go to step 3. Close the cover.

3. Are the connections between the FCE, FDU, and cover sensor loose?

Connect the cables properly. Go to step 4.

4. Does the FDU switch on +24VSW when a ringing signal is detected or when Copy is pressed?

Go to step 8. Go to step 5.

5. Does the signal from the cover switch change when the cover is opened and closed?

If CLOSE PAPER COVER is not displayed when the cover is open, change the FCE. Go to step 6.

Change the cover switch and/or the actuator mechanism.

6. Are the connections between the FDU, LIU, and telephone line loose?

Connect the cables properly. Go to step 7.

7. Does the FCE send the POWON signal to the FDU when a ringing signal is detected or when Copy is pressed?

Replace the PSU. Replace the FDU or LIU.

8. Are the connections between the FDU and the paper end sensor loose?

Connect the cables properly. Go to step 9.

9. Does the Replace Paper indicator light when paper is present?

Go to step 11. Go to step 10.

10. Does the signal from the paper end sensor change in the correct way?

Change the FCE. Replace the paper end sensor.

11. Are the connections between the PSU, FDU, and the rx motor loose?

Connect the cables properly. Go to step 12.

12. Does the FDU output power and phase drive signals to the rx motor?

Replace the rx motor. Replace the FDU.

5-4

Page 50

2. Jam

Symptom: Jam

Check Action if Yes Action if No

1. Is the printer jammed with debris?

Clear the debris. Go to step 2.

2. Is the printer jam sensor good? Go to step 5. Go to step 3.

3. Are the connections between the printer jam sensor and the FDU loose?

Connect the cables properly. Go to step 4.

4. Does the signal from the printer jam sensor change correctly?

Change the FDU. Replace the printer jam sensor.

5. Is the cutter blade at the home position after cutting (left hand side of the machine) ?

Replace the FCE. Open the printer cover, set the paper

correctly, and close the printer cover. Go to step 6.

6. Does the cutter initialize itself ? Go to step 7. Replace the cutter unit.

7. Are the connections between the FDU and the paper end sensor loose?

Connect the cables properly. Go to step 8.

8. Does the Replace Paper indicator light when paper is present?

Go to step 10. Go to step 9.

9. Does the signal from the paper end sensor change in the correct way?

Change the FDU. Replace the paper end sensor.

10. Are the connections between the PSU, FDU, and the rx motor loose?

Connect the cables properly. Go to step 11.

11. Does the FDU output power and phase drive signals to the rx motor?

Replace the rx motor. Replace the FDU.

Symptom: Abnormal noise

Check Action if Yes Action if No

1. Is the cover closed? Go to step 2. Close the cover.

2. Are the printer mechanisms assembled correctly?

Replace the rx motor or the FDU. Assemble the machine properly.

5-5

Page 51

5-3. ERROR CODES

If an error code occurs, retry the communication. If the same problem occurs, try to fix the problem as suggested below. Note that error codes 4-00, 01, 02, and 10 only appear in the error code display and on the service report.

Code Meaning Suggested Cause/Action

0-00 DIS/NSF not detected within 40 s

of Start being pressed

Check the line connection. Check the LIU - FDU - FCE connectors. The machine at other end may be incompatible. Replace the FDU or LIU. Check for DIS/NSF with an oscilloscope. If the rx signal is weak, there may be a bad line.

0-01 DCN received unexpectedly The other party is out of paper or has a jammed printer.

The other party pressed Stop during communication. 0-03 Incompatible modem at other end The other terminal is incompatible. 0-04 CFR or FTT not received after

modem training

Check the line connection.

Check the LIU - FDU -FCE connectors.

Try changing the tx level (use NCU parameter 10).

Replace the FCE, FDU or LIU.

The other terminal may be faulty; try sending to another machine.

If the rx signal is weak or defective, there may be a bad line. 0-05 Unsuccessful after modem

training at 2400 bps

Check the line connection.

Check the FCE - LIU - FDU connectors.

Try adjusting the tx level (use NCU parameter 10).

Replace the FCE, FDU or LIU.

Check for line problems. 0-06 The other terminal did not reply to

DCS

Check the line connection.

Check the FCE - FDU - LIU connectors.

Try adjusting the tx level (use NCU parameter 10).

Replace the FCE, LIU or FDU.

The other end may be defective or incompatible; try sending to

another machine.

Check for line problems. 0-07 No post-message response from

the other end after a page was sent (3rd try failed)

Check the line connection.

Check the FCE - FDU - LIU connectors.

Replace the FCE, LIU or FDU.

The other end may have jammed or run out of paper.

The other end user may have disconnected the call.

Check for a bad line.

The other end may be defective; try sending to another machine. 0-08 The other end sent RTN or PIN

after receiving a page, because there were too many errors

Check the line connection.

Check the FCE - FDU - LIU connectors.

Replace the FCE, LIU or FDU.

The other end may have jammed, or run out of paper or memory

space.

Try adjusting the tx level (use NCU parameter 10).

The other end may have a defective modem/NCU/FCU; try sending

to another machine.

Check for line problems and noise.

5-6

Page 52

Code Meaning Suggested Cause/Action

0-10 The other end did not send a

reply to EOP, EOM or MPS

Check the line connection. Check the FCE - FDU - LIU connection. Replace the FCE, LIU or FDU. Try adjusting the tx level (use NCU parameter 10). The other end may have a defective modem/NCU/FCU; try sending to another machine. Check for line problems and noise.

0-14 Non-standard post message

response code received

Check the FCE - FDU - LIU connectors. Incompatible or defective remote terminal; try sending to another machine. Noisy line: resend. Try adjusting the tx level (use NCU parameter 10). Replace the FCE, LIU or FDU.

0-20 Facsimile data not received within

6 s of retraining

Check the line connection. Check the FCE - FDU - LIU connectors. Replace the FCE, LIU or FDU. Check for line problems. Try calling another fax machine. Change the reconstruction time from 6 s to 10 s (bit switch 01, bit 0). Switch the rx cable equalizer on (bit switch 00, bit 1).

0-21 EOL signal (end-of-line) from the

other end not received within 5 s of the previous EOL signal

Check the connections between the FCE, FDU, LIU, & line. Check for line noise or other line problems. Replace the FCE, LIU or FDU. The remote machine may be defective or may have disconnected.

0-22 The signal from the other end

was interrupted for more than

0.2 s

Check the line connection. Check the FCE - FDU - LIU connectors. Replace the FCE, LIU or FDU. Defective remote terminal. Check for line noise or other line problems.

0-23 Too many errors during reception Check the line connection.

Check the FCE - FDU - LIU connectors. Replace the FCE, LIU or FDU. Defective remote terminal. Check for line noise or other line problems. Switch the rx cable equalizer on (bit switch 00, bit 1). Ask the other end to adjust their tx level.

1-00 Document jam Improperly inserted document or unsuitable document type.

See "Mechanical Operation - Document Jam".

1-01 Document length exceeded the

maximum

Divide the document into smaller pieces. See "Mechanical Operation - Document Jam".

1-10 Document in the scanning

position at power-up

Clear debris from the sensor actuators. Check the SBU horizontal adjustment. Replace SBU, FCE or FDU.

1-17 Document jam in the feed-out

area

1-20 Printer jam - paper did not reach

the exit

Clear any debris from the sensors and the paper path. Clean the sensors in the printer. Check that the copy tray is not overloaded. Check the paper feed mechanism and paper path for faults. Check the connections from the FDU to the rx motor and printer sensors. Replace the rx motor, printer jam sensor, or FDU.

1-21 Printer jam - paper stuck at the

exit

5-7

Page 53

Code Meaning Suggested Cause/Action

1-23 Cutter jam Clear any debris from the sensors and the paper path.

Clean the cutter sensor.

Check the cutter mechanism.

Check the connections from the FDU to the cutter motor and cutter

sensors.

Replace the cutter motor, cutter sensor, or FDU.

1-24 Cutter failed to initialize

1-30 Paper ran out during printing Add paper.

If paper is present, clean the paper end sensor and check the sensor

circuit for defects. Replace the FCE, FDU or the paper end sensor.

1-33 Paper end was detected when

the machine was switched on

1-71 The printer cover was opened

during printing

Check whether the user opened the cover during printing.

Check the cover lock mechanism.

Check the cover switch position and actuation mechanism.

Check connections between the cover switch and the FDU.

Replace the cover switch, FCE or FDU. 2-12 Modem clock irregularity Replace the FCE. 2-20 Abnormal coding/decoding (cpu

not ready)

Replace the FCE.

4-00 One page took longer than 8

minutes to transmit

Check for a bad line.

Try the communication at a lower resolution, or without halftone.

Change the FCE. 4-01 Line current was cut Check the line connector.

Check the connection between the FDU and the LIU.

Check for line problems.

Replace the FDU, the FCE or the LIU. 4-02 The other end cut the received

page as it was longer than the maximum limit.

Ask the other end to change their maximum receive length setting,

then resend.

4-10 Communication failed because of

ID Code mismatch (Closed Network) or TSI mismatch (Authorized Reception)

Get the ID Codes the same and/or the TSIs programmed correctly,

then resend.

The machine at the other end may be defective.

5-21 Memory overflow Temporary memory shortage or the document takes up too much

data.

Use a lower resolution or do not use Halftone.

Replace the FCE. 6-01 Post message could not be

received after a page was sent (G3 ECM)

Check the line connection.

Check the connections between LIU - FDU - FCE.

Try adjusting rx cable equalizer.

The other end may have a defective Modem/FCU/NCU; try sending

to another machine.

Check for line problems and noise. 6-02 EOR received (G3 ECM) Check the line connection.

Check the connections between LIU - FDU - FCE.

Try adjusting rx cable equalizer.

The other end may have a defective Modem/FCU/NCU; try sending

to another machine.

Check for line problems and noise.

5-8

Page 54

Code Meaning Suggested Cause/Action

6-05 Facsimile data frame not received

within 18 s of CFR, but there was no line fail (G3 ECM)

Check the line connection. Check the connections from the FCE, FDU to the LIU. Check for a bad line or defective remote terminal. Replace the FCE or LIU. Switch the rx cable equalizer on (bit switch 00, bit 1).

6-06 Coding/decoding error (G3 ECM) Defective FCE.

Defective remote terminal.

6-08 PIP/PIN was received in reply to

PPS.NULL (G3 ECM)

The other end pressed Stop during communication. The other terminal may be defective.

6-09 ERR received (G3 ECM) Check for a noisy line.

Adjust the tx levels of the communicating machines. See code 6-05.

6-10 Error frames still received at the

other end after all communication attempts at 2400 bps (G3 ECM)

Check for line noise. Adjust the tx level (use NCU parameter 01). Check the line connection. Defective remote terminal.

5-9

Page 55

6. ELECTRICAL DATA

6-1. CONNECTION FROM FCE

T/H

8 9

5 6

1 2 3

FDU FCE

LIU

CN4

CN1

CN3

5 6

1 2 3

5 6

1 2 3

CN5

OPU

CN1

CN7

CN1

36 37

COM1

+5V

THSEN

STB3 STB2 STB1

STB0

PRLAT

PRDT

PRCLK

N.C.

OH INTHK HOOK

COM1 ONHK

LIUSCK

SOD

SID2

+5V

COM1

-5V SOD SID1

SCK1

5 6

1 2 3

7 8 9

38 39

1 2 3 4 5 6 7 8 9

1 2 3 4 5 6 7

8 9

11 12 13

14 15

16 17

18 19

20 21 22 23

24 25 26 27 28

29 30

31 32 33 34

11 12 13

14 15

16 17 18

20 21 22

23 24 25 26 27 28 29 30 31 32 33 34

7 6

5 4

3 2

9 8

41 42

45 46

47 48

COM1

TONSEL

MONVOL

CUT0 CUT1

LEDON

POWON

CK24V

SB10

SB7

SB8 CBUS0 CBUS1 CBUS2 CBUS3

DDSW SWC1

ADSEL

BAT

-5V

COM1

+5V

COM1

TXD

RXD

AVXIN COM2 SENS

XVIDEO

RESET

CSRAM0

CSRAM1

VSEL0 VSEL1

DCCLP

PHRES

BUZ

MSCK

MSOD

AVMEOS

AVMST

MONON

36 37

38 39

40 41

42 43

6-1

Page 56

6-1-1. FCE - FDU

CN1

No Name Function V

1 N.C. No connection 2 N.C. No connection 3 N.C. No connection 4 N.C. No connection 5 COM1 Digital ground 0 6 TXD Transmit data X 7 RXD Receive data X 8 AVXIN AVM send signal X 9 COM2 Analog ground 0 10 SENS SB4 or SB5 X 11 XVIDEO Analog video signal X 12 SH Shift clock to CCD C 13 RESET Reset out 5 14 CSRAM0 N.C. in FDU (EIO2

control in FCE)

15 CSRAM1 N.C. in FDU (EIO2

control in FCE)

16 VSEL0 Gain control of video

signal

0 - 5

17 VSEL1 Gain control of video

signal

0 - 5

18 PH 1st phase transfer clock

to CCD

19 DCCLP DC restore request of

video signal

20 PHRES Reset clock to CCD C 21 BUZ Buzzer drive signal 0 22 MSCK S/P clock of motor C 23 MSOD Data of motor C 24 AVMEOS from AVM IC 5 25 AVMST to AVM IC 0 26 MONON Monitor speaker control 0 27 TONSEL Tone/Rx control 0 28 MONVOL to AVM IC 0 29 CUT0 Cutter control 0 30 CUT1 Cutter control 0 31 LEDON LED array control 0 32 POWON +24VSW control 0 33 CK24V T/H check 5 34 SB10 SB10 (Cover open) 0 35 SB7 SB7 (Cutter position) 5 36 SB8 SB8 (Cutter position) 0 37 CBUS0 AVM IC data 0 38 CBUS1 AVM IC data 0 39 CBUS2 AVM IC data 0 40 CBUS3 AVM IC data 0

CN1

No Name Function V

41 DDSW N.C. in FDU 0 42 SWC1 N.C. in FDU 0 43 ADSEL SB4/SB5 exchange

control

44 BAT Battery Power 3 45 -5V Power -5 46 COM1 Digital ground (N.C. in

FDU)

47 +5V Power 5 48 COM1 Digital ground 0

6-1-2. FCE - Thermal Head

CN3

No Name Function V

1 COM1 Ground 0 2 +5V Power 5 3 THSEN Thermistor input X 4 STB3 Fourth strobe 5 5 STB2 Third strobe 5 6 STB1 Second strobe 5 7 STB0 First strobe 5 8 PRLAT Print data latch pulse 5 9 PRDT Print data 5 10 PRCLK Print data sampling clock 5 11 N.C. No connection 0

6-1-3. FCE-OPU

CN5

No Name Function V

1 +5V Power 5 2 COM1 Ground 0 3 -5V Power -5 4 SOD Serial output data C 5 SID1 Serial input data C 6 SCK1 Serial shift clock C

6-2

Page 57

6-1-4. FCE - LIU

CN4

No Name Function V

1 N.C. No connection 0 2 OH OH relay control 0 3 INTHK Internal hook SW detect 5 4 HOOK Current detect 5 5 RI Ringing detect 5 6 COM1 Ground 0 7 ONHK On hook relay control 0 8 LIUSCK Serial clock and rest C 9 SOD Sereal output data C 10 SID2 Serial input data C

Note: "V" is the level of the signal after power on.

C: Clock (0 - 5V) X: Analog (0 - 5V) L: Telephone line

6-3

Page 58

6-2. CONNECTION FROM FDU

FDU

5 6

1 2 3

5 6

1 2 3

5 6

1 2 3

PSU

SBU

T/H

SB-4

SB-5

SB-10

Cutter

5 6

1 2 3

1 2

5 6

1 2 3

7 8

Rx Motor

Tx Motor

LED Array

LIU

Speaker

Test Points

CN5

CN7

CN15

CN6

CN11

CN12

CN13

CN14

CN9

CN8

CN10

CN22

CN16

1 2 3

1 2

1 2 3

TXMA TXMAB TXMB TXMBB +24V +24V

RXMA RXMAB RXMB RXMBB +24V +24V

XVIDEO COM2 OPHTG

OPH1 OPHRES

+5V +24V

COM3

+24VSW +24VSW

SB4 COM1 +5V

SB10 COM1

DCMT1 DCMT0 SB7 COM1 SB8

+24V LEDON

+5V COM1

TXOUT RXIN TONE MONIT COM2 COM1 +5V +24V

SPOUT COM1

+24V +24V COM3 COM3

SB5 COM1 +5V

CN4

1 2 3

XVIDEO SH COM2

6-4

Page 59

6-2-1. FDU - PSU

CN5

No Name Function V

1 +24V DC power 24 2 +24V DC power 24 3 COM3 Ground for +24V 0 4 COM3 Ground for +24V 0

6-2-2. FDU - SBU

CN7

No Name Function V

1 XVIDEO Analog video signal X 2 COM2 Analog ground 0 3 OPHTG Shift clock to CCD C 4 OPH1 First phase transfer clock C 5 OPHRES Reset clock (CCD output

buff.)

6 +5V +5V DC power 5 7 +24V DC power 24

6-2-3. Scanner Test Points

CN15

No Name Function V

1 XVIDEO Analog video X 2 COM2 Ground 0 3 SHT Shift clock to CCD C

6-2-4. FDU - Thermal Head

CN6

No Name Function V

1 COM3 Ground for +24V 0 2 COM3 Ground for +24V 0 3 +24VSW Switched 24V 5 4 +24VSW Switched 24V 5

6-2-5. FDU - FCE

CN1: See FCE CN1 (section 6-1-1).

6-2-6. FDU - Paper End Sensor (SB-4)

CN11

No Name Function V

1 SB4 Signal from sensor X 2 COM1 Ground 0 3 +5V DC power 5

6-2-7. FDU - Paper Jam Sensor (SB-5)

CN12

No Name Function V

1 SB5 Signal from sensor X 2 COM1 Ground 0 3 +5V DC power 5

6-2-8. FDU - Cover Sensor (SB-10)

CN13

No Name Function V

1 SB10 Signal from sensor 0 2 COM1 Ground 0

6-2-9. FDU - Cutter

CN14

No Name Function V

1 DCMT1 Cutter drive 1 0 2 DCMT0 Cutter drive 0 0 3 SB7 Signal from cutter end

position sensor

4 COM1 Ground 0 5 SB8 Signal from cutter home

position sensor

6-2-10. FDU - Rx Motor

CN9

No Name Function V

1 RXMA Rx motor phase A drive 24 2 RXMAB Rx motor phase A drive 24 3 RXMB Rx motor phase B drive 24 4 RXMBB Rx motor phase B drive 24 5 +24V +24V DC power 24 6 +24V +24V DC power 24

6-5

Page 60

6-2-11. FDU - Tx Motor

CN8

No Name Function V

1 TXMA Tx motor phase A drive 24 2 TXMAB Tx motor phase A drive 24 3 TXMB Tx motor phase B drive 24 4 TXMBB Tx motor phase B drive, 24 5 +24V +24V DC power 24 6 +24V +24V DC power 24

6-2-12. FDU - LED Array

CN10

No Name Function V

1 +24V DC power 24 2 LEDON LED array drive 14 3 +5V DC power 5 4 COM1 Ground 0

6-2-13. FDU - LIU

CN22

No Name Function V

1 TXOUT Transmit data 0 2 RXIN Receive data 0 3 TONE Tone input 0 4 MONIT Monitor input 0 5 COM2 Analog ground 0 6 COM1 Ground 0 7 +5V +5V DC power 5 8 +24V DC power 24

6-2-14. FDU - Speaker

CN16

No Name Function V

1 SPOUT Speaker out 0 2 COM1 Ground 0

Note: "V" is the level of the signal after power on.

C: Clock (0 - 5V) X: Analog (0 - 5V) L: Telephone line

6-6

Page 61

6-3. CONNECTION FROM LIU

LIU

OPU

Handset

HSB

1 2

LSWS0

LSWS1

LSWS2 LSWC0

LSWS4 LSWC2

LSWC1 LSWS3

CN3

CN6

CN5

CN8

INTHK

COM1

CN1

CN2

SPL

MICL

SPH MICH

LINE1

RING1

TEL1

RING2

TEL2

LINE2

CN1

CN2

Line

Tel

SHUNT T1

GSTART

SHUNT

N.C.

GSTART

CN1

CN2

6-7

Page 62

6-3-1. LIU-Line

CN1

No Name Function V

1 SHUNT Shunt signal 0(L) 2 T1 External phone tip L 3 L1 Phone line tip L 4 L2 Phone line ring L 5 T2 Extermal phone ring L 6 GSTART Tel ground 0(L)

6-3-2. LIU - Handset

CN6

No Name Function V

1 SPL Speaker - 0 2 MICL Microphone - 0 3 SPH Speaker + 0 4 MICH Microphone + 0

6-3-3. LIU - FCE

CN7: See FCE CN4 (section 6-1-4).

6-3-4. LIU - FDU

CN4: See FDU CN22 (section 6-2-13).

6-3-5. LIU - HSB

CN5

No Name Function V

1 LINE1 Connection from the line L 2 RING1 Connection to the ring

detection circuit

3 TEL1 Connection to the

handset

4 RING2 Connection to the ring

detection circuit

5 TEL2 Connection to the

handset

6 LINE2 Connection from the line L

6-3-6. LIU - HSB

CN8

No Name Function V

1 INTHK Handset off-hook 5 2 COM1 Ground 0

6-3-7. LIU - OPU Dialpad

CN3

No Name Function V

1 LSWS0 Key input 3 2 LSWS1 Key input 3 3 LSWS2 Key input 3 4 LSWC0 Common signal to the

dialpad

0 - 4

5 LSWS4 Key input 3 6 LSWC2 Common signal to the

dialpad

0 - 4

7 LSWC1

0 - 4

8 LSWS3 Key input 3

6-3-8. LIU-Tel

CN2

No Name Function V

1 SHUNT Shunt signal 0(L) 2 N.C. No connection 3 T1 Phone line tip L 4 T2 Phone line ring L 5 N.C. No connection 6 GSTART Tel ground 0(L)

Note: "V" is the level of the signal after power on.

C: Clock (0 - 5V) X: Analog (0 - 5V) L: Telephone line

6-8

Page 63

APPENDIX A. LINE INTERFACE

1. Overall LIU Description

The LIU (Line Interface Unit) has all the telephone line interface functions and contains a telephone unit which is powered by the machine when the machine is switched on, and is alternatively powered from the telephone line when the machine is switched off.

The line interface contains filters, a current sensor, RY1 relay, RY2 relay, and ring detection circuit. The RY1 relay switches the line connection either to the internal telephone unit or to the modem. The RY2 relay switches the line either to the external telephone and the ring detection circuit or to the internal dialing circuit. In standby mode, both relays are switched down to connect the line to the external telephone and the ring detection circuit. When the internal handset is picked up, the hook switch goes up to connect the line to the dialer and speech circuit for dialing and voice communication. The RY2 relay is only switched up when the ‘‘On Hook Dial’’ key is pressed for On-hook dialing. The internal telephone unit contains the handset interface, speech circuit, and a dialer (microcontroller with built-in CPU, ROM, RAM and DTMF tone generator).

The single tone signals, CNG, CED, dial tone, and busy tone are detected by the modem on the FCE through a high impedance transformer.

DI Relay

DC/DC

Handset

Photocouplers

Speech Circuit

Dialer

OPU

Line

External

Telephone

Current Sensor

Ringing Detection

High Impedance Transformer

Speaker Volume

Line Transformer

HSB

RY1 Relay

RY2 Relay

FCE/ FDU

Hook Switch

Filter Protection

LIU Block Diagram

A-1

Page 64

2. Making a Telephone Call

2-1. Manual Dialing from the External Telephone

In standby mode, the line is connected to the external telephone. Then the user can dial from the external handset. If the user presses Start to send or receive a fax message, the RY1 relay switches up to connect the line to the modem.

2-2. Manual Dialing from the Built-in Telephone

There are two ways to dial manually from the built-in telephone: handset mode and on-hook mode. Handset mode: When the user

picks up the handset, the Hook Switch goes up to connect the line to the dialer and speech circuit. The digits dialed at the dialpad are directly informed to the dialer, and the dialer dials the number and passes them to the FCE to indicate the dialed number on the LCD. If the user presses Start to send or receive a fax message, the RY1 relay switches up to connect the line to the modem on the FCE.

On-hook mode: When the user presses the On Hook Dial key, the RY2 relay switches up to connect the dialer to the line. Then the dialer acts in the same way as explained for handset mode.

LIU OPU

FDU/FCE

LCD

LEDs

Other Keys

Dialer

Pulse/Tone

GS/Flash

Photocouplers

Speech Circuit

To/From the Line

Handset

12 Keys

Dialpad

Relays

RY1/RY2

(Not used)

LIU/OPU Block Diagram

A-2

Page 65

The telephone features (dialing, voice communication) can also be used when the machine is switched off. When the handset goes off-hook or the On Hook Dial key is pressed, the dialer is powered by the dc voltage from the line. Then the dialed digits are directly informed to the dialer.

2-3. Automatic Dialing

When the machine starts to dial, the RY2 relay switches up to close the DC loop. After line current is detected, (see the diagram on page A-1), the dialer starts dialing. Then the machine waits for the line connection and CED before it starts sending the fax message. If busy tone is detected before line connection, the machine will disconnect the line.

2-4. Dialing Method (Pulse/Tone)

The LIU has a mechanical switch beside the modular jack to select either pulse dial or DTMF dial. This switch can be accessed by the user. The dialer checks the setting of this switch every time the FCE detects off-hook, then dials the number using the indicated method.

2-5. PSTN Access from behind the PBX

When the machine is behind a PBX, the user can program which type of access method is required.

Loop Start: The user has to program an access code with Function 15. Ground/Flash Start: Ground Start cannot be used. The user has to select the function of the R (Recall) key on the

operation panel for Flash Start. Even if the user selects Ground Start with the slide switch at the rear of the machine, the machine is set to Flash Start mode. After the dc loop is closed, the machine detects the line current, detects PBX dial tone, accesses the PSTN using the correct method, detects PSTN dial tone, then dials the number.

LIU OPU

FDU/FCE

LCD

LEDs

Other Keys

Dialer Pulse/Tone

GS/Flash

Photocoupler

Speech Circuit

To/From the Line

Handset

12 Keys

Dialpad

DC Power supplied from LINE

No power

supplied

PHONE-A/B

VCC-1

LINE-A/B

OH/ONHK

Relays

(Not used)

LIU/OPU Block Diagram - Power OFF

A-3

Page 66

3. Receiving a Telephone Call

3-1. Manual Receive Mode

When the user picks up the handset, the Hook Switch goes up to connect the line to the speech circuit for voice conversation. If the user presses Start to send or receive a fax message, the RY1 relay switches up to connect the line to the modem, which is on the FCE.

3-2. FAX (Automatic Receive) Mode

When the machine detects a ringing signal, the machine switches up the RY1 relay and starts to send CED/DIS/NSF for fax reception.

3-3. AUTO (Auto Tel/Fax Switch) Mode

This mode switches the line automatically to the internal telephone unit or to the modem, depending on the type of remote terminal (phone or fax). When the machine detects a ringing signal, the machine switches up the RY1 relay (the ringer is disabled by the dialer in this mode). Then the machine starts CNG detection, starts to send a voice message (3.5 s after ring detection), and starts to call the user to the machine (7 s after ring detection). If a CNG is detected during these periods, the machine starts to send CED/DIS/NSF for fax reception. If the user picks up the handset (the Hook Switch goes up), the machine switches down the RY1 relay to connect the line to the speech circuit. If CNG is not detected and the user does not respond to the call within 30 s, the machine sends CED/DIS/NSF before disconnecting the line.

3-4. TAM (Telephone Answering Machine) Mode

This mode is only for use when a telephone answering machine (TAM) is connected to the same line. When a call is coming in, the external TAM first catches the call; the machine can detect this by checking the HOOK signal. To let the TAM catch the line first, the number of rings (N) until TAM detects a call has to be programmed in the machine. The machine automatically waits N+1 rings before it catches the call, in order to let the external TAM catch the call first when the TAM is active. After catching the call, the TAM sends the pre-recorded message to the other end, and the machine starts to detect a CNG and a 5 s (variable) silent period. If the machine detects a CNG or a 5 s silent period, the machine regards the other end as a fax terminal and sends CED/DIS/NSF to receive the fax message. Refer to section 1-3-1 for more information.

DI Relay

DC/DC

Handset

Photocouplers

Speech Circuit

Dialer

OPU

Line

External

Telephone

Current Sensor

Ringing Detection

High Impedance Transformer

Speaker Volume

Line Transformer

HSB

RY1 Relay

RY2 Relay

FCE/ FDU

Hook Switch

Filter Protection

LIU Block Diagram

A-4

Page 67

APPENDIX B. POWER DISTRIBUTION

1. PSU/FDU

The PSU regulates the 120 or 220 to 240 Vac input to generate +24 Vdc. The +24Vdc is then supplied to the secondary power supply circuit on the FDU to generate ± 5 Vdc. The +24VSW for the thermal head is switched on by the FCE when a fax call is coming in; this voltage is watched by the FCE to check for overload.

2. Battery Back-up

On the FCE board, the system memory SRAM and the KFCP, which controls the real time clock’s oscillator, always have to be backed up by dc voltage. When the power is supplied from the PSU, VCC (+5V) and +5VBAT back up these ICs. When power is not supplied from the PSU, the voltage detector on the FCE connects the BAT signal, upon which +3Vdc is supplied from the battery on the FDU, to +5VBAT, so that it can back-up these ICs.

3. LIU Back-up

When the power is not supplied from the PSU, the internal telephone unit is still active. When the handset is picked up or the On Hook Dial key is pressed, the dc loop in the LIU circuit is closed. Then the speech and ring detection circuit regulates the line voltage to wake up the microcontroller on the LIU. For more details, see Appendix A "Line Interface".

PSU

FDU

+5V Regulation

-5V Regulation

+24VSW

+24V

+5V

-5V

+24V

+24V Switch

T/H

FCE

LIU

+24V Overload Check

CK24V POWON

OPU

SBU

Tx/Rx Motors

LED Array

Cutter

Sensors

120/220-240 Vac

+5V

-5V

+5V

-5V

+24VSW+5V

+5V

+24V

+24V +24V

+5V

+5V and/or -5V

+24V or +24VSW

(VCC)

+24V

DC-DC

Switcher

IC1

(MC34063AP1)

PSU

FDU

+5V Regulation

+5V

+24V

120 /220-240 Vac

(VCC)

FCE

+5VBAT

(3V)

BAT VCC

XTL 1 32768Hz

For Real Time Clock

VCC

System Memory

Voltage Detector

IC2

(BH9751F)

KFCP

IC1

IC7

SRAM

DC-DC

Switcher

IC1

(MC34063AP1)

BAT2

(RF5A47)

(MH62256)

B-1

Page 68

APPENDIX C. ELECTRICAL COMPONENT DESCRIPTION/DATA FLOW

1. PCBs

This section explains the functions of the PCBs and their components.

1-1. FCE (Facsimile Control Engine)

This engine board performs all control tasks, image processing, and Tx/Rx data processing. It contains the KFCP (which contains a CPU and a video processor), DSP (which contains the modem), a ROM (1 Mbits), an SRAM (32 kbytes), and two 128 kbyte DRAMs (one for SAF, and the other for ECM in the FAX240 only). There is an OTP (One Time Programmable) ROM in an SOP type package.

1-2. FDU (Facsimile Driver Unit)

This driver unit interfaces with the peripherals. It contains Tx, Rx and cutter motor drivers, the scanner interface, secondary power supply (which generates ±5V from the +24V output from the PSU), a battery for FCE back-up, a HIC for modem signal amplification and filtering, and an AVM generation circuit.

Line

Handset

OPU

EOI2

SRAM DRAM

CONTROL SIGNALS

FDU

FCE

Thermal Head

SBU

Scanner and Printer Drive Conponents and Sensors

PSU

LIU

HSB

Voice

Processor

Speaker

HIC2

AFEDSP

KFCP

Video Processor

DATA AND ADDRESS BUS

FAX240 only

C-1

Page 69

1-3. LIU (Line Interface Unit)

This unit performs all interface functions to the telephone line and contains an internal telephone unit. Refer to Appendix A ‘‘Line Interface’’ for details.

1-4. PSU (Power Supply Unit)

This unit regulates the 120/220-240 V ac input and generates +24V for the FDU and thermal head. The power cord and the main switch are separate from the PSU assembly and are fixed to the body frame.

1-5. SBU (Sensor Board Unit)

This unit has a CCD which scans the document and detects light path blockage by the document/scan line sensor actuators.

1-6. OPU (Operation Panel Unit)

This unit receives all keypad input information and indicates instructions for users using LEDs and an LCD. The ten key pad is still available for dialing even if the main power is switched off.

1-7. HSB (Hook Switch Board)

This board has a hook switch and a ringer.

2. Data Flow

2-1. Transmission

Data/Address Bus

AFE

DSP

(Modem)

SRAM

FIFO

Line

Buffer

DRAM

(ECM:128kB)

DRAM

(SAF:128kB)

KFCP

EIO2

DCR

P/S

Digital Video Process

Analog Video Process

SBU

T/H

FCE

FDU

HIC2

AVM ROM

Voice

Processor

LIU

LINE

FAX240 only

C-2

Page 70

2-1-1. Direct Transmission (non ECM) 2-1-2. Direct Transmission (ECM)

2-1-3. Memory Transmission (non ECM) 2-1-4. Memory Transmission (ECM)

KFCP

SRAM

FDU

LIU

SBU

Analog V. P.

Digital V. P.

DCR

EIO2

DSP (Modem)

AFE

HIC2

FCE

LINE

Line Buffer

Attenuation/Amplification

Filtering

ECM Memory

ECM Framing

Compression

SAF Memory

ECM

Back up for Page Retransmission if ECM memory is not used for SAF

SRAM

KFCP

SRAM

FDU

LIU

SBU

Analog V. P.

Digital V. P.

DCR

EIO2

DSP (Modem)

AFE

HIC2

FCE

LINE

Line Buffer

Attenuation/Amplification

Filtering

FIFO

Filtering

SAF Memory

LIU

KFCP

SRAM

SBU

Analog V. P.

Digital V. P.

DCR

EIO2

FCE

LINE

Line Buffer

Filtering

FIFO

DSP (Modem)

AFE

Attenuation/Amplification

FDU

HIC2

Filtering

Back-up for Page Retransmission

ECM Memory

( if ECM is not used for SAF)

KFCP

SRAM

FDU

LIU

SBU

Analog V. P.

Digital V. P.

DCR

EIO2

DSP (Modem)

AFE

HIC2

FCE

LINE

Line Buffer

Attenuation/Amplification

Filtering

ECM Memory

ECM Framing

Compression

ECM

C-3

Page 71

2-2. Reception

2-2-1. Non ECM Reception 2-2-2. ECM Reception

Data/Address Bus

AFE

DSP

(Modem)

SRAM

FIFO

Line

Buffer

DRAM

(ECM:128kB)

DRAM

(SAF:128kB)

KFCP

EIO2

DCR

P/S

Digital Video Process

Analog Video Process

SBU T/H

FCE

FDU

HIC2

AVM ROM

Voice

Processor

LIU

LINE

FAX240 only

FDU

HIC2

Filtering

KFCP

SRAM

FCE

ECM Frame Breaking

LIU

LINE

Filtering

DSP (Modem)

AFE

Attenuation/Amplification

ECM Memory

DCR

Line Buffer

Reconstruction

P/S

Line Buffer

Thermal Head

Printing

Back-up for Substitute Reception

SAF Memory

Demodulation

ECM

EIO2

FDU

HIC2

Filtering

KFCP

SRAM

FCE

ECM Frame Breaking

LIU

LINE

Filtering

DSP (Modem)

AFE

Attenuation/Amplification

ECM Memory

DCR

Line Buffer

Reconstruction

P/S

Line Buffer

Thermal Head

Printing

Back-up for Substitute Reception

SAF Memory

Demodulation

ECM

EIO2

C-4

Page 72

APPENDIX D. MECHANICAL DESCRIPTION

1. ADF/Scanner

The machine has two significantly different points in the ADF/scanner mechanism from older models. The first point is the integrated scanner and sensor mechanism, and the second point is the simplified ADF mechanism.

1-1. Integrated Scanner/Sensor Mechanism

The document sensor (SB-

1) and scan line sensor (SB-

2) are integrated into the scanner mechanism. The basic composition of these sensors is similar to photointerrupters. However, instead of using discrete photodiode/phototransistor assemblies for each sensor, elements of the LED array and CCD are used.

On the left hand side of the LED array, there are red LEDs dedicated for the two scanner sensors. These LEDs are always on. Light from these LEDs passes through the lens to the right hand side of the CCD, where there are 112 elements specially provided to detect this light (the 4th bit is allocated to the scan line sensor (SB-2) and the 58th bit is allocated to the document sensor (SB-1)).

If a sensor actuator blocks the light path, the CCD waveform shows a dropout, then the CPU will detect it. In standby mode, the CCD output is as shown on the

right. The peak on the left side of the waveform indicates that the light path in both of the sensors is unblocked.

When a document is placed in the feeder, the document sensor actuator blocks the light path to the CCD. When the cpu detects this, it starts prefeeding the document and switches on the rest of the LED array.

White Reflector

CCD

SBU

112 elements

for

SB-1,2

1728 elements

for

Image

LED Array

Lens

+5V

+24V

SB-1 (Document Sensor)

Actuator

SB-2 (Scan Line Sensor) Actuator

4th bit for scan line sensor

58th bit for document sensor

D-1

Page 73

When the document reaches the scan line sensor, the actuator blocks the light path through that sensor. Then prefeed stops to prepare for scanning.

The XVIDEO output while the machine is scanning the document is shown on the right. While scanning the document, the LED array flashes every 10 ms.

As the trailing edge of the page leaves the scan line sensor, the light path through that sensor becomes unblocked again. However, if there are some pages remaining in the feeder, the light path through the document sensor remains blocked.

After the transmission has ended, or after the copy has been printed, the LEDs for scanning the original switch off. The scanner is back in standby mode.

D-2

Page 74

1-2. ADF Mechanism

The ADF consists of the feed roller, R2 roller, document/scan line sensors and separation rubber plate. When a document is placed in the feeder, the document sensor detects it as explained in the previous section. Then, the CPU switches the LED array on and turns the feed roller until the document reaches the scan line position. After the handshake is completed or the Copy key is pressed, the feed roller feeds the document until the leading edge reaches the R2 roller (the machine scans the first 15 mm of the document). From this point, the R2 roller feeds the document until the trailing edge of the document passes the feed roller. Both the R2 roller and the feed roller are in contact with the document. However, the R2 roller turns a bit faster than the feed roller. After the trailing edge passes the feed roller, only the R2 roller feeds the document. So, the document is fed into scanner slowly during the first 15 mm, at the normal speed when the document is fed by both rollers, then at a faster speed when the document is free from the feed roller. The magnification rate of the scanned image varies in these three parts.

2. Printer

The printer mechanism for FAX220 is different from the FAX240. Only the FAX240 has a cutter and decurler unit.

2-1. FAX220 (Manual Cutter Models)

The printer is very simple. After printing has finished, the machine feeds the paper 22 mm to the cutting position. So received messages will have a 22 mm blank space at the top.

SBU

Feed Roller

R2 Roller

Document Sensor

Scan Line Sensor

LED Array

Separation Rubber Plate

Gap Clutch

15mm

37mm

Feed Roller Only

Feed Roller and R2 Roller

R2 Roller Only

D-3

Page 75

2-2. FAX240 (with Shuttle Cutter and Decurler)

2-2-1. Decurler

The decurler unit consists of the decurler cover, decurler bracket and the decurler spring on the platen roller shaft. In standby mode, the decurler bracket is down at the standby position. When the machine starts printing, the decurler spring on the platen roller shaft lifts up the decurler towards the bend in the decurler cover. Then the paper path is curved as shown in the bottom diagram, so that the two bends on the decurler cover can apply negative stress to the curled paper to get rid of the curl from the paper. The decurler bracket always applies the same negative force (N) to the paper, but the negative stress on the paper varies depending on the amount of paper remaining. The tension (T1) when the roll is almost full is stronger than the tension (T1’) when the roll is almost empty, and the tension (T2) equals to (T2’). So, the paper path is curved more strongly as the paper roll gets lighter. After printing has finished, the machine cuts the paper then reverses the Rx motor to feed back the paper to the printing position and to move the decurler bracket down to the standby position.

2-2-2. Shuttle Cutter

The shuttle cutter consists of a paper guide frame, rotary cutter blade, motor, cutting start sensor (SB-7), cutting end sensor (SB-8), and jam sensor (SB-5). In standby mode, the cutter blade is always at the cutting start position. When the machine has finished printing, the Rx motor stops then the cutter blade shuttles across the paper. The cutting end sensor detects that the cutter blade has finished cutting, then the CPU reverses the cutter motor to move the cutter blade to the cutting start position. After cutting, the Rx motor feeds out the copy, then it reverses to feed the paper back to the printing position and to move the decurler bracket down to the standby position.

T1 > T1’ T2 = T2’ N = N

Paper Roll

Thermal Head

Decurler Cover

Decurler Bracket

Platen Roller

Paper Roll

Thermal Head

Decurler Cover

Decurler Bracket

Platen Roller

T1’

T2’

Motor

Tension spring

Cutter end sensor (SB-8) Cutter start sensor (SB-7)

Rotary cutter blade

Paper jam sensor (SB-5)

Cutter drive wire

D-4

Ricoh FAX220, FAX240 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual