Oki OKIFAX OF-38 Field Service Manual Download Page 168

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5.1.4

NAK Tone Detection

Service personnel can adjust the NAK (Not Acknowledge) tone detection frequency

with a potentiometer.

The disassembly procedure to reveal the NCU-181 is described in sub-item 7.3.5 in

Chapter 7.

PC board name:

Measurement points:

Specification:

Required tool:

Measurement

NCU-181

pin and

pin

The

pin reading is 3240 Hz 10 Hz

RV4 (potentiometer)

Frequency

counter

Oscillator

Connect the leads of the frequency counter between the

pin and the

pin

(See Figure 5.1.4 at next page.)

Connect the leads of the oscillator at line terminals and

Turn on the AC power switch.

Verify the specifications.

5 - 7

Summary of Contents for OKIFAX OF-38

Page 1: ...OfClFAx OF 38 Facsimile Transceiver HELD SERVICE HANDBOOK...

Page 2: ...OKIFAX OF 38 FACSIMILE TRANSCEIVER FIELD SERVICE HANDBOOK 0 0...

Page 3: ...3 l InstallationSite Environments _ Unpacking UnpackingProcedure ContentsChecking AC Cord Connection 3 2 3 2 3 2 3 2 3 3 3 3 3 6 Initial Settings 3 4 3 6 1 General 3 4 3 6 2 SettingonPC Board 3 6 3 6...

Page 4: ...Printing 4 18 ListofErrorDataontheReport 4 23 ListofServiceCodeontheReport 4 25 CHAPTER 5 5 1 5 1 1 5 1 2 5 1 3 5 1 4 5 1 5 5 1 6 ADJUSTMENT 5 1 Electrical Adjustments 5 1 Ringing Signal Detection Sen...

Page 5: ...LED 6 5 Abnormal Print out 6 6 NoGoodLocalCopy 6 7 No Dial Tone Detection 6 9 NoAuto Dialing 6 12 Transmission Communication Trouble 6 14 NoAuto Reception 6 16 Reception Communication Trouble 6 17 Tro...

Page 6: ...dth Detection Switches 7 24 RearCover 7 27 Side Cover RI Power Supply Unit 7 28 Thermal Head Assembly 7 30 _ SNS PC Board 7 35 ADF Roller Feed Rollers AUX PC Board 7 37 AUX PC Board 7 40 Pulse Motors...

Page 7: ...C H A P T E R I GENERAL INFORMATION 0 0 s...

Page 8: ...CHAPTER 1 GENERAL INFORMATION 1 1 Features l l 1 2 GeneralAppearance l 3 0 0 c7...

Page 9: ...e touch key programing function 8 252 3 digit location codes 9 Splittransmission 10 3 kindsofthecall back message 11 Automatic page retransmission 12 Print multi copies at remote 13 Sequential broadca...

Page 10: ...I printing Acoustic monitor RS232Cinterface applications Verification stamp 11 management reports print out 22 local diagnosis tests 29 user s function settings 42 configkation program settings 44 ser...

Page 11: ...Figure 1 2 1 and Figure 1 2 2 below The operation control panel of the OF 38 is shown in Figure 1 2 3 OPERATION PAPER COMPARTMENT COVER FRONT COVER Fig 1 2 1 General appearance front view RIGHT SIDE...

Page 12: ...Fig 1 2 3 Operation Control Panel of the OKIFAX OF 38 l 4...

Page 13: ...0 0 co CHAPTER 2 SPECIFICATIONS...

Page 14: ...aratus Desktop design ApplicableTelephone Line Communication Mode ialf duplex Transmission Mode CCITT G2 and G3 Document Size 1 Width Max 297 mm IS0 A3 size Min 148 mm IS0 A5 size 2 Length Specificati...

Page 15: ...orescent lamp 14W green 8 Recording System 2 048 dots flat bet thermal printing 9 Coding Scheme 1 One dimensional coding scheme MH Modified Huffman 2 Two dimensional coding scheme MR Modified READ 3 M...

Page 16: ...t state ARQ TPP 02 CCITT ECM TPP 06 13 Image Memory Capacity l Mbyte 2 Mbyte option 14 Half tone Transmission 1 scale gradation Dither algorithm 15 Protocol 1 CCITT Rec T 30 2 OKI special protocol a S...

Page 17: ...mes continuously or 10 times non consequentive 9600 7200 4800 2400 If at 2400 bps the receiver has not made a successful detection in 30 seconds of the normal frame the receiver can transmit a DCN sig...

Page 18: ...s maximum 10 functions and should not exceed 60 SENDER ID CALL BACK MSG NO REDUCTION POLLING RX SPLIT TX RELAY B CAST REVERSE POLL MULTI COPY G2 TX DELAY SEND POLL PAGE RE TX MAIL BOX TX FEEDER TX LIN...

Page 19: ...ceived 21 Closed User Group The OF 38 compares the last 4 digit of an auto dialed number 1 Receiver side To protect direct mail 2 Transmitter side To prevent callingwrong number Default state PP 45 Te...

Page 20: ...an separately transmit the right and left haves so that the receiving machine can receive two copieswithout reduction in the size of printed message Temporary setting P 5 Split Transmission format exa...

Page 21: ...e call back message transmission prepares the following three kind of formats l Format setting P l Call Back Message format example 11 0081 3 4321519 P L E A S E C A L L B A C K 23 09 3 17 13 acl FLsE...

Page 22: ...format 1 example Sender ID format 2 example Size of the sender ID characters printed on the received copies becomes double when this special symbol feature is used Notes 1 Sender ID print position Us...

Page 23: ...transmitter has Retransmission detected an RTN signal from a receiver with a memory transmission capability Retransmission Page format example RE TRANSMISSION PAGE FAX Message Default state PP 49 Tem...

Page 24: ...elect a receiving in memory when acting as relay station to enable disable as the default state PP 35 l User or service personnel can set to print out of message at relay station to enable disable as...

Page 25: ...git check code PP 46 The cipher reception provides a 4 digit password PP 47 l Temporary setting PO 16 User or service personnel can set the cipher communication mode to on off as the default state PP...

Page 26: ...nd F2 individually l Functions SENDER ID CONF TX NO REDUCTION POLL TX SPLIT TX POLL RX REVERSE POLL RELAY B C G2 TX MULTI COPY PAGE RE TX DELAY SEND POLL FEEDER TX TOTAL PAGES LINE MONITOR CLOSED USER...

Page 27: ...emory Mailbox numbers 01 to 64 Confidential passwords about each mailboxes are provided PP 39 Temporary setting P 7 User or service personnel can set the function to enable disable asthe default state...

Page 28: ...not as the default state TPP 41 50 Auto Paper Cutting APC The OF 38 provides a cutter unit Manual cut of printing paper is available Service personnel can program the continuous page printing without...

Page 29: ...fault arrangement PP 22 2 Acoustic dialing monitor Default arrangement PP 25 The OF 38 provides RS 232C interface connections and prepares the following four modes 1 Encryption mode 2 External MODEM m...

Page 30: ...to A4 Vertical reduction ratio 6l7 4 s u3 Horizontal reduction ratio 6 7 4l5 2l3 58 Effective Reading Width I 297mmtl DOC CENTER 255mm l DOC CENTER 255 mm f 1 DOC DIVIDE 297mm l DOC CENTER 255 mm k 1...

Page 31: ...2 1 8...

Page 32: ...g items by programing BROADCAST COMMUNICATION ERROR RELAY BROADCAST POLLING MANUAL TRANSMIT CONFIDENTIAL TX DELAY SEND POLL DELAYED MAIL BOX TX AUTO DIAL TRANSMIT l User or service personnel can set t...

Page 33: ...EpFRm ID 826 ml D I S T A N T S T A T I O N N O 62 Memory Entry Report The OF 38 can print out a memory entry report automatically that one of the following items has been programed l Default state PP...

Page 34: ...ort Specifications The OF 38 can print out a configuration report to confirm an initial setting or rearrange the machine configuration Setting PP OO Configuration Report format example C O N F I G U R...

Page 35: ...ne Number List The OF 38 can print out the programed telephone numberforauto dialing l Setting PP Ol Telephone Number List format example T E L E P H O N E D I R E C T O R Y x w 83 II 44 ID Bz3I 3 432...

Page 36: ...ting l Setting PP 02 One touch Key Assignment format example O N E T O U C H K E Y L I S T O N E T O U C H K E Y 01 491 O N E T O U C H K E Y 0 2 O N E T O U C H K E Y 0 3 O N E T O U C H K E Y 0 4 O...

Page 37: ...6 Item Specifications ogrammable Parameter rt The OF 38 can print out the programed parameter list toconfirm an initial parameter setting l Setting PP O3 Programmable Parameter List format example _ 2...

Page 38: ...lo Item Specifications 57 Cancel Report The OF 38 can print out a cancel report if operator has been canceled some image data in memory Setting P CLEAR Cancel Report format example 2 2 5...

Page 39: ...2 2 6...

Page 40: ...Report The OF 38 can print out an power off report automatically when AC power is resumed Power Off Report format example FeeI A C T I V E M E M O R Y F I L E S I 189 13 59 1 c881 3 KQ151s M E S S A...

Page 41: ...PP 21 13 Department ID When the department ID input is set to on the LCD display the message at the right in the standby state l Programing TPP 44 74 One line Minimum Scanning 0 millisecond this means...

Page 42: ...ents up to 356 mm in length which meet the basis weight and thickness specification 78 Document Jam Detection 1 When the end of document is not detected within 445 mm after scanning begins except if u...

Page 43: ...208 1 l G3lB4 Denotes receiving a signal from a G3 type machine transmitting 84 documents G3 A4 Denotes receiving a signal from a G3 type machine transmitting A4 documents GUA4 Denotes receiving a sig...

Page 44: ...a micro switch when the paper has run out the LC displaywill show NO PAPER l The OF 38 will continue receiving message into memory if the memory has space l Upon termination of message reception this...

Page 45: ...and stack them without jamming when the paper length falls in the range of 105 mm to 356 mm 39 Line Interface Requirements 1 Impedance 600 ohms or 900 ohms balanced Selectable by a strapping wire on...

Page 46: ...he ring detect circuit will not activate on dial pulses lo 20 pps dial tone or other spurious noises on the telephone line 91 Local Diagnosis The OF 38 provides the following test items as the local d...

Page 47: ...test 19 Send and receive motor running test 20 Consecutive digit dialing test 21 Specific digit dialing test 22 Auto test 1 Display of total count a Transmitted pages PO 23 b Received pages PO 24 c Co...

Page 48: ...a strapping wire on the power supply unit a 190VAC to 250VAC b 97 5VAC to 130VAC 2 Frequency range 47 Hz to 63 Hz 3 Power consumption Mode Transmit Receive Receive All black Copy Normal Copy All black...

Page 49: ...ermal print head unit base which is more than 70 C during reception it will interrupt the reception as follows Stop the printing Return a DCN signal after responded to EOPIEOMIMPS signal from the remo...

Page 50: ...Appearance Dimensions Weight Specifications General appearance and dimensions of the OKIFAX OF 38 isshown in Figure 2 1 1 Width Approx 360 mm 2 Depth Approx 560 mm 3 Height Approx 170 mm Approx 14 kg...

Page 51: ...defined as the sequence required to print one black picture element 4 MT9F The MTBF for the overall machine will exceed 2 500 hours of actual operation MTBF will be measurable at a confidence level o...

Page 52: ...09s r El 1 SLl r pr Fig 2 1 General appearance and dimensionsof the OKIFAX OF 38 2 39...

Page 53: ...CHAPTER 3 lNSTALi_ATION...

Page 54: ...3 Programming by Tenkey Operation 3 19 3 7 Telephone and Line Connection _ ______ 3 4 7 3 8 Frame Ground Connection 3 48 3 9 RS 232C Interface Connection 3 49 3 10 Accessory Installation 3 SO 3 10 1...

Page 55: ...CHAPTER 3 INSTALLATION 3 1 General The following flow chart shows the general installation procedure I Unpacking I Telephone and line connections 3 1...

Page 56: ...ctrical noise producing machines nearby Unpacking Unpacking Procedure 1 Remove the tape from the top of the cardboard box and open its covering panels 2 Remove the Accessory Packing Cushion 3 Lift the...

Page 57: ...s list Item No Contents Name 1 OKIFAX OF 38 FacsimileTransceiver 2 Document Stacker 3 Copy Stacker 4 Document Support 5 AC Power Cord 6 Thermal Recording Paper 7 User s Guide WY 1 1 1 1 1 1 1 vol 3 5...

Page 58: ...how a required setting items and an option setting items their two parts Table 3 6 1 Setting on PC board DIP switch 51 Machine version Int llUS DP rate 10 pps 20 pps Multi frequency signal level entio...

Page 59: ...Table 3 6 2 Programming by Tenkey operation Length of tone duration PTT parameters Sender ID programming 3 5...

Page 60: ...telephone exchange requirement 1 Location of the DIP switches a Removethe screw 0 The Terminal Cap can be removed SCREW TERMINAL CAP Fig 3 6 2 1 b The AUX PC board can be seen in the figure below Fig...

Page 61: ...tion Table 3 6 3 DIP switch 51 on the AUX PC board To perform a service personnel setting for a technical setting and maintenance according tothe applicable line and telephone set i e Dial Pulse DP or...

Page 62: ...r to notes below t OFF 52 6 Subscriberline 8dB OFF Refer to notes below 52 7 equalization RX side 4dB OFF Notes 1 To equalize the amplitude versus frequency characteristic of the subscriber line insta...

Page 63: ...kHz 1 0 2 0 3 0 Fig 3 6 2 4 Subscriber line characteristics attenuation vs frequency 4 Slide switch 54 explanation The switch 54 location is shown in Figure 3 6 2 3 of this item User or service person...

Page 64: ...the additional sending power level and the multi frequency MF signal attenuation 1 Location of the DIP switch a Open the Compartment Cover by using the Release Lever And remove a screw COMPARTMENT CO...

Page 65: ...ver then the NCU PC board can be seen in the figure below kU PC BOARD Fig 3 6 2 8 cl YU3512 166 R 1 JACK CONNECTION JC5 y RV3 gz fir NCU 181 DIP SWITCH 51 Fig 3 6 2 9 Location of the DIP switch on the...

Page 66: ...wer level 0 5 dB To attenuate the ON adjustment image signal and the Sl 2 Signal MF 1 dB multi frequency signal level OFF 3 Jack connection JC5 for line impedance Service personnel can change the tele...

Page 67: ...hall be performed as the multi frequency MF signal attenuation 1 Location of the DIP switch a Open the Compartment Cover by using the Release Lever And remove a screw 0 COMPARTMENT COVER Fig 3 6 2 10...

Page 68: ...g 3 6 2 13 Location of the DIP switch 51 on the MB PC board 2 DIP switch 51 explanation Table 3 6 6 DIP switch 51 on the MB PC board DIP Switch Sl No Function ON Position Description P u r p o s e Fac...

Page 69: ...just the buzzer acoustic sound by a potentiometer RVl 1 Location of the RVl d Open the Compartment Cover by using the Release Lever And remove a screw 0 W Remove the two screws COMPPrRTMENT S CR E W F...

Page 70: ...RVl can be see in the figure below MCNTl PC BOARD POTENTIOMETER RVl Fig 3 6 2 16 Location of the potentiometer RVl on the MCNTl PC board 2 Adjusting Clockwise The acoustic sound can be increased Coun...

Page 71: ...Mbyte memory capacity 1 Location of the extensioned D RAMS a Remove the Front Cover b Remove the MODEM NCU MCNTZ and the MCNTl PC board Then RR 18 PC board can be seen in the figure below RR 18 PC BOA...

Page 72: ...d D RAM Q ty a Modification work a Mount the 8 pcs D RAMs b Remove a resistor R31 on the board Refer to Figure 3 6 2 18 Remarks OR OR OR OR Note OKI has hot the responsibility of your modification wor...

Page 73: ...for 5 or more seconds Tap q q on the Tenkey pad Adjust calendar and clock e o December 15 1988 13 30 LC Display shows I 12 15 88 13 30 I 16 PROGRAM CLOCK MM DD YY HH MM I Tap q q q q q q on the Tenke...

Page 74: ...LCDisplayshows l Standby I 12 15 88 13 30 I l Tumon DIP switchsl 3onthe AUX PC board l Depress the PROGRAM key for 5 or more TECHNICAL PROGRAM seconds l Tap q q ontheTenkey pad Bring the cursor to th...

Page 75: ...s S t a n d b y I 12 15 88 1X 30 I l Turn on DIP switch 51 3 on the AUX PC board 0 Depress the PROGRAM key for 5 or more seconds l Tap q q on the Tenkey pad 321 PB DURATION 7 5 8 5 2 0 0 M S I l Bring...

Page 76: ...PROGRAM PROGRAM NO P WPTT PARAMETER 1 INT L TYPICAL Table 3 6 7 PTT parameter Country No Country Country No country I 1 1 Int l Typical 1 11 1 Austria Normal 1 2 U K 12 Austria Flashing 3 Norway 13 Au...

Page 77: ...Table3 7 3 PTT parameter 3 2 3...

Page 78: ...X PC board l Depress the PROGRAM key for 5 or more seconds l Tap q q on the Tenkey pad l Bring the cursor to the desired mark by tapping q on the Tenkey pad And depress the ENTER key to register LC Di...

Page 79: ...PC board a Depiess the PROGRAM key for 5 or more seconds l Tap q q OntheTenkeypad a Bring the cursor to the desired mark by tapping q on the Tenkey pad And depress the ENTER key to register LC Displa...

Page 80: ...the PROGRAM key for 5 or more seconds LC Display shows TECHNICAL PROGRAM PROGRAM NO P Tap q q ontheTenkeypad 45 DATE FORM D M Y U D Y I l Bring the cursor to the desired mark by tapping q on the Tenke...

Page 81: ...tation identification Operation LC Display shows l Standby l Turn on DIP switch 51 3 on the AUX PC board l Depress the PROGRAM key for 5 or more seconds l Tap q q on the Tenkey pad l Enter the install...

Page 82: ...epress the PROGRAM key for 5 or more seconds I USER PROGRAM PROGRAM NO P I l Tap q q ontheTenkeypad 04 ENTER LOCATION NO I l Set the 3 digit location code e g 1 2 3 LOCATION NO I23 l Set the telephone...

Page 83: ...ONE OF ONE TOUCH KEYS I a To select a ONE TOUCH key e g one touch key No 1 LOCATION NO l Set the 3 digit location code ONE TOUCH NO 01 e g 1 2 3 a Depress the ENTER key to register a Press the ENTER k...

Page 84: ...Function Name Delay Send Poll a77 Mailbox TX 867 Notes 1 Enable Only denotes that the programmed function will be enabled when the assigned key is pressed and remain valid only on a onetime basis unt...

Page 85: ...functions Callback Message Follow the guidance message on Character Display and select one out of three message marks Polling Rx 4 digit Password l or if the registered 4 digit Polling No or System C...

Page 86: ...cters ENTER SENDER ID The following identifies the character generating functions of the special e Touch keys and Keypad ior spelling of the Sender ID No 56 one touch key Alphabets only A 8 C ___ Y Z...

Page 87: ...Operation l Standby Depress the PROGRAM key for 5 or more seconds l Tap q q on the Tenkey pad Pressing the q key will produce a black dot atthe cursor position and pressing II a white dot l Press the...

Page 88: ...of the programs assigned to pw e ig ed tO all of programmable functions keyswhich are both FUNCTION and One Touch keys One Touch and Function keys The printed example is shown item No 65 of the specif...

Page 89: ...ID print position To determine the position of Sender ID and Callbackhlerrageto be printed on the recording paperatfhe receiving end Theporitionfhatiseither INSIDEor OUTSIDE of the message area q q Ad...

Page 90: ...ine ata specified time on an everyday bark for variouraleRing purposes The machine is availablewithtwotoner 2400 Hror q q Default arrangement To determine the default status of the verification stamp...

Page 91: ...trtaturcfthe time out message in memory confidential mersege in the memory To select the default status of the receiving memorywhen acting asrelaying station for q q Relay broadcasting 71 To register...

Page 92: ...4 005 355 0 0 7 357 407 008 408 358 013 363 413 059 G2 TX Page Retransmission Feeder TX 1 Line Monitor I Document Remove Message Confirmation 7 I I I 17g I Cancel 181 I RS 232C Interface 045 I I I 47...

Page 93: ...the in process communication completes Disable Only denotes that the program denied function will be disabled when the assigned key is pressed and remain invalid until the communication in process is...

Page 94: ...N OFF I To select to printout the some message confirmation reports automatically whenever the communication is completed To select to printout the some merlage entry reports automatically when the ma...

Page 95: ...ord rent by remote receiver with the digit check code registered in advance in the local machine The tranr miner will perform the transmission only if the two coder are matched H q To register passwor...

Page 96: ...e If thetype E isretin offthe machine will usually communicate with the distant station inlype A TO select the default state for the automatic repeat request in the error correcting system NAK tone 32...

Page 97: ...6bSb4 b3bZbl b9 b8 b7 b6 b5 b4 b3 bZ bl I For denying Location Parameter the machine default precedes 0 For making Location Parameter valid 1 For ignoring the 1st DIS Digital Identification Signal sig...

Page 98: ...limit count of occurrences consecutive line errors each exceeding the limit number during reception of one page i 15 ofdoc ent Tosetthe limit numberof ARQframeerrors which may ocwron the non consecuti...

Page 99: ...n orderto beabletomakerettingr for some other communication also the is held up for a certain suspended halfway Tosetthe automaticrerettimerif an operation is suspended halfway Default setting is 90 s...

Page 100: ...elected by the technical programming PP 47 FJ q Priority selection b a e w mgeSrage m ToseieR thedefault rteteforthepdority between the copying operation and the message receiving operation reception...

Page 101: ...standby state of the machine g q Selection of usage of RS_ 32C poe 1 TO select the default state for the usage of RS 232C interface port of the machine 3 q Selection of auto dial mode for PBX facilit...

Page 102: ...set and the applicable line by following the procedures below 1 Remove the screw The Terminal Cap can remove from the machine 2 The telephone set and the terminal line can be seen in the figure below...

Page 103: ...IP switch Sl Programming 3 6 3 2 5 Telephone Network 51 8 OFF AUX 181 3 6 2 1 2 P8X extension P8X line ON Programming by 3 6 3 2 Tenkey 5 3 Leased line DIPswitch Sl 8 ON AUX 181 3 6 2 1 3 8 Frame Grou...

Page 104: ...1 2 Connect the interface connectors to DCE and DTE Fig 3 9 2 RS 232C interface connectors 3 Confirmation of the RS 232Csetting Item Setting Way Programming Reference No PC Board Sub item No 1 DIP swi...

Page 105: ...on 3 10 1 Thermal Recording Paper 1 Push the Release Lever The Compartment Cover can be opened COMPARTMENT RELEASE Fig 3 10 1 2 Set the thermal recording roll in the figure below THERMAL RECOkDlNG PAP...

Page 106: ...3 Set correctly the top of paper Fig 3 10 3 4 The OF 38 can be cut the top of paper automatically after closed the cover 3 5 2 i...

Page 107: ...onto hanging positions A and A B and B C and C respectively COPY STACKE Fig 3 10 4 Hanging positions for the stackers 2 Hang the document support in the figure below DOCUMENT DOCUMENT SUPPORT COPY ST...

Page 108: ...can change the setting into 115 V in accordance with the following procedures 1 Setting procedure a Disassemble the Side Cover R Refer to sub item 7 3 10 in Chapter 7 b The Power Supply Unit can be s...

Page 109: ...DIP switch Sl on the AUX PC board Refertosub item 3 6 2 1 c Depress the PROGRAM key more than 5 seconds The LC Display becomes the technical program setting d Tap q q onthetenkeypad The OF 38 can be...

Page 110: ...s off the hook press the START button and confirm that the FAX lamp is lit After about 35 seconds the machine can take a time out Make sure that the ALARM lamp lights the audible alarm sounds Note The...

Page 111: ...nd then stops automatically 3 To receive facsimile messages from a remote G3 or G2 machine 4 The typical receiving procedure is described in Figure 3 13 1 3 13 3 Transmission 1 Totransmit facsimile me...

Page 112: ...Fig 3 13 1 Flow chart for typical message reception 3 5 8...

Page 113: ...Fig 3 13 2 Flow chart for typical message transmission 3 59...

Page 114: ...CHAPTER 4 MAINTENANCE...

Page 115: ...CHAPTER 4 MAINTENANCE 4 1 Routine Inspection 4 l 4 2 Self DiagnosisTests 4 3 4 3 Protocol Dump Printing 4 18 4 4 ListofErrorDataontheReport 4 23 4 5 ListofServiceCodeontheReport 4 25...

Page 116: ...e4 1 1 If transmitted pages are counted more than 100 000 times replace the fluorescent lamp 0 Including Copy mode If transmitted pages are counted more than 30 000 times replace the rubber 0 Includin...

Page 117: ...SEPARATION RUBBER FLUORESCENT LAMP FEED ROLLERS 0 THERMAL HEAD PRINT ROLLER Fig 4 1 1 Routine inspection 4 2...

Page 118: ...iagnostic test function 1 Procedure of the self diagnosis test mode a Turn ON AC power switch b Turn ON 3 of DIPswitch 51 on the NW PC board Refer to sub item 3 6 2 1 in Chapter 3 c Depress the PROGRA...

Page 119: ...light source fluorescent lamp optical path CCD image sensor and the associated circuit I To check the functional validity of the input ports provided in the machine 1 EnterNo l to 4 D LC Display will...

Page 120: ...osition ID No Name of Key ID No Name of Key A l ca Cl lzi A2 q c2 lxi A3 q c3 IxJ A4 AUTO RECEIVE c4 RELAY BROADCAST A5 DELAY SEND POLL c5 CONFIDENTIAL RX A6 PROGRAM A7 Not used C6 F2 c7 Not used A8 N...

Page 121: ...ap NO Yanlr I r rIs L II LC pay XI 3 r Enter No 2 Position identification NO on LC Display AlAEA3AUA5A6A7AB BlB2B3BflB5868788 ClC2C3CflC5C6C7CB DlD2D3D iD5D6D7D8...

Page 122: ...4 7...

Page 123: ...cation No on LC Display AlAZA3A lA5A6A fA8 BlBZB3B485B6B788 ClCZC3C lC5C6C7C8 DlD2D3DbD5D6D7D8 84 One Touch key No 44 65 One Touch key No 45 86 One Touch key No 46 87 One Touch key No 47 88 One Touch...

Page 124: ...pa on the RR 18 PC board by the checkruti test Incaseof all ROM chips are normal the LC Display ill show below In care of any faulty ROM chips be found the LC Display will show below for example 521R...

Page 125: ...After S RAM test is normal the test will perform next D RAM test In care of all D RAM chips are normal the LC Display will show below 1 In tare of DRAM NG message the RR 18 PC board should be require...

Page 126: ...r tranrmirrion rate matched in advance technical programming No 11 TX SIDE RX SIDE Press the ENTER key I e g 9600 bps xx Test running time seconds Press the ENTER key time seconds YYYY Error count l T...

Page 127: ...IDE RX SIDE I J Talk each other Press the ENTER key 1 578 L MODEM TEST 1 Press the ENTER key GND x x xx Test running time seconds TRCD ON xx Test running time seconds YYYY Error count l The time count...

Page 128: ...into the line for level and When MFl is selected the LC Display will show below Then selecting one of 12 characters on the tenkey pad Pressing the STOP button for the release aEl Not used gJ q Clearin...

Page 129: ...EI Not red ZlEi Not used g H Clearing records for TO clear the default parameters of the existing machine configuration various reports and default configuration data as specified No 2 Telephone Numbe...

Page 130: ...he operation they all will close except for POWER All theirwindowrwill be sequentially opened and closed one by one on the individual bare q q Character LCD display I orderof To check the validity of...

Page 131: ...nt Feeder test 1 To check theAD sy5tem To place document r on the feeder and press the START button then the machine will start feeding document sheets one by one in the usual manner q q Paper cutting...

Page 132: ...auto dialing function of the machine for digits specified Note DIP switch 51 on the NCU PC board Elm Auto test To check the following tests automatically 1 ROM check tea 2 ROM version check 3 RAM val...

Page 133: ...tch b Turn ON 3 of DIPswitch Sl on the NCU PC board Refer to sub item 3 6 2 1 in Chapter 3 c Depress the PROGRAM key for 5 seconds or more The LC Display shows TECHNICAL PROGRAM PROGRAM NO P d Tap q q...

Page 134: ...4 19...

Page 135: ...ed space Received DTC 16 bytes Not used space Received NSF 96 bytes Received NSS 96 bytes Received NSC 96 bytes Not used space Transmitted or Received CSI 32 bytes Transmitted or Received CIG 32 bytes...

Page 136: ...he dump data which are printed out Figure 4 3 3 shows the result of an analysis of the protocol dump data in Figure 4 3 1 refer to the FCF signal conversion Table 4 3 1 next item Transmitter Receiver...

Page 137: ...TSI 42 C2 Transmitting Subscriber Identification DCS 41 Cl Digital Command Signal CFR 21 Al Confirmation to Receive MCF 31 Bl Message Confirmation FTT 22 A2 Failure to Train MPS 72 F2 Multi Page Signa...

Page 138: ...18 OVER 65MIN PACE JAM 2 Communication time over 65 minutes 19 EXCEEDS MEMORY OVER MEM 20 CIPHER COMM ERR COMM ERR Remote terminal not provided with cipher communication function 21 NO DIAL TONE LINE...

Page 139: ...E HEAT ALH 1 COMM ERR REMOTE STOPPED I COMM ERR CLOSED USER ERR 1 COMM ERR NO C F BOX COMM ERR REMOTE NO PAPER 1 COMM ERR Password mismatch in cipher communication Hatching error in closed network com...

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Page 160: ...CHAPTER 5 ADJUSTMENT...

Page 161: ...5 2 2 Setting up for Adjustment 5 15 5 2 3 Measurements Adjustments 5 16 Electrical Adjustments 5 1 Ringing Signal Detection Sensitivity 5 1 Dial Tone and Busy Tone Detection Level 1 5 3 Dial Tone an...

Page 162: ...can be appeared at the KS 5 pin when a ringing signal of 20 Hz at 25 V is inpljt to the line terminals and The RI 16 Hz signal can not be appeared at the IC5 5 pin when a ringing signal of 60 Hz at 1...

Page 163: ...1667 R I NCU 181 1 pin Fig 5 1 1 Ringing signal detectidn sensitivity measurement points on the NCU 181 2 Adjustment Use the RVl potentiometer on the NCU 181 to adjust the sensitivity if necessary Se...

Page 164: ...he IC5 8 pin reading becomes Low 0 V when a tone of 400 Hz at 30 0 dBm is input to the line terminals and The IC5 8 pin reading becomes High 5 V when a tone of 400 Hz at 32 0 dBm is input to the line...

Page 165: ...just the detection level if necessary See Figure 5 1 2 b Fully turn the RV2 counterclockwise c Slowly turn the RV2 clockwise until the output signal on the oscilloscope changes from High 5 V to Low 0...

Page 166: ...V when a HIGH tone signal of 400 Hz at 25 0 dBm is input to the line terminals and The ICS 6 pin reading becomes High 5 V when output a tone signal of 400 Hz at 27 0 dBm is input to Level the line te...

Page 167: ...just the detection level if necessary See Figure 5 1 3 b Fully turn the RV3 counterclockwise c Slowly turn the RV3 clockwise until the output signal on the oscilloscope changes from High 5 V to Low 0...

Page 168: ...urement points Specification Control Required tool 1 Measurement NCU 181 IC6 11 pin and IC6 6 pin AG The IC6 11 pin reading is 3240 Hz 10 Hz RV4 potentiometer Frequency counter Oscillator a Connect th...

Page 169: ...k YU3512 1667 IC6 Fig 5 1 4 NAK tone detection frequency on NCU 181 2 Adjustment Use the RV4 potentiometer on the NCU 181 to adjust the frequency range if necessary See Figure 5 1 4 5 8...

Page 170: ...ial program setting No 26 Buzzer Tone selection I High 2400 Hz Low 600 Hz Select the High or Low if necessary c Operate the technical program setting No 70 Buzzer Test That is the buzzer will continuo...

Page 171: ...potentiometer Required tool Digital voltmeter 1 Measurement a Connect the leads of the digital voltmeter between TPl test point and Ground FG See Figure 5 1 7 at next page b Turn on the AC power swit...

Page 172: ...Open the Compartment Cover then we can see a potentiometer and the near end window NEAR END WINDOW RVl Control Fig 51 6 Location of the Near End Detection Fig 5 1 7 Near End detection adjustmenton NES...

Page 173: ...ame Measurement points Specification Control Testinstrument Document to be used SNS 18 TP2 and G Ground 2 8 V White signal RVl Potentiometer Oscilloscope Dual trace OKI Test ChartA77 39 See Figure 5 2...

Page 174: ...n mmmmm m mrm m 5 1 3...

Page 175: ...3 Scanner assembly SNS 18 PC BOARD SCREW SHIELDING PLATE Fig 5 2 4 Scanner assembly 5 14...

Page 176: ...18 PC BOARD Ll u R Fig 52 5 SNS 18 board and scan assembly 2 Connect the oscilloscope probes to test points TP2 and G Ground of the SNS 18 The second probe of the oscilloscope should be connected to T...

Page 177: ...e SNS 18 and temporarily fix the two screws See Figure 5 2 4 of sub item 5 2 1 1 Remove the Shading Plate two screws See Figure 52 4 2 Set an all white document 274 mm width A3 size on the document fe...

Page 178: ...101 until it is set at the reading position 2 Loosen the lens lock screw 3 Move the lens back and forth in the direction of the symbol F to maximize the output level difference Lens Lens Lock Screw Fi...

Page 179: ...side edge line Additional line Fig 5 2 11 Additional lines on the specified chart l 4 I I t 7 6 Fig 5 2 12 Additional lines on the chart Detail b Adjust the document guide to the chart width read lin...

Page 180: ...igure 5 2 14 That is the black horizontal line is read Fig 5 2 14 Sensoraxisalignment forreading position 3 Make sure that the sensor output waveform can be changed horizontally as Figure 5 2 15 by re...

Page 181: ...chart 2 Move the lens back and forth until a sensor output waveform appears somewhat like that shown in Figure 52 17 with large symmetrical circles Then tighten the lens lock screw Figure 5 2 18 Note...

Page 182: ...ecified chart 2 Use the CH2 channel of the oscilloscope to observe the marker signal at test point TPl on the MCNTZ PC board and use the CHl channel for the sensor output waveform at the side reading...

Page 183: ...thickness must be 0 13 mm 2 Install the shading plate See Figure 5 2 4 of sub item 5 2 1 3 Adjust the shading plate according to the sensor output waveform shown below Fig 5 2 21 Sensor output after s...

Page 184: ...n continuously lit for at least 10 minutes for lighting stabilization Fig 5 2 22 Sensor output waveform all white signal 2 Verify that the test point TP4 output level is 2 8 VtO 3 V using the above do...

Page 185: ...t TP2 sensor output and TP3 peak hold External trigger of the oscilloscope connects the TPl of the SNS 18 2 Shield the light by covering the lens with paper Make sure that the TP2 output decreases as...

Page 186: ...CHAPTER 6 TROUSLESHOOTING...

Page 187: ...rmal Print out 6 6 NoGoodLocalCopy 6 7 No Dial Tone Detection 6 9 NoAuto Dialing 6 12 Transmission CommunicationTrouble 6 14 No Auto Reception 6 16 ReceptionCommunicationTrouble 6 17 Troubleshooting t...

Page 188: ...hooting for field service or work shop people Electrical Troubleshooting Flow Chart Overall 1 Turn on the AC power switch 1 Is ALARM LED lit See the Lit Alarm LED 7 I Sub item 6 13 1 I I VYes PC board...

Page 189: ...e a FAX communication I In which mode e Y See the No Dial Tone Detection Yes Is the auto dialing operate normal No communication trouble See the Reception CommunicationTrouble Sub item 6 1 10 Verify s...

Page 190: ...ove the Front Cover Sub item 7 3 1 Does the DC 5 V lZV and 12V appear at the specified pins on MODEM Check all connector cables on the OPE M PC board cable and see the troubleshooting of Power Supply...

Page 191: ...0 0 0 Fig 6 1 1 MODEM PC board 6 4...

Page 192: ...1 3 LitAlarm LED communication error Does the shutter Does the Character 1 1 z cording p a p e r 1 Does the Character LCD show HEAT ALARM No Wait about 10 min or more Y Replace the MCNTZ PC board 6 5...

Page 193: ...scope probe between lC5 86 pin LATCH and Ground terminal lsthe KS 86 pin observed the following waveform lsthe KS 99 pin observed thefollowingwaveform Yes 5vr I I 0 53 msec at 20 C No v Are the Head D...

Page 194: ...61 5 No Good Local Copy L I CYeS the printed data all b l a c k I Has an image signal appeared at the test point TPZonthe SNS PC board 6 7...

Page 195: ...1 Replacethe MCNTZ PC board e the printed data still IAre the printed data abnormal Yes NO 1 Sub item 6 2 6 8...

Page 196: ...oes the dial tone gnal appear between a Junction JC3 on the NCU PC board No es Does the control signal 5 V appear at the transistor Ql s x No base lead I I Replace the Ql Replace the RLl Does the sign...

Page 197: ...k or adjust with potentiometers RV2 and RV3 by referring to sub items 5 1 2 and 5 1 3 inchapter 5 L Isthe dial tone detected after their adjustment in No rL soard Check the connectors on MB PC board 6...

Page 198: ...Li YU3512 1667 Fig 6 1 2 NCU 181 PC board JC3 6 1 1...

Page 199: ...dial speed at the correct setting the correct setting Operate the Consecutive Digit Dialing Test of the h Gy program setting J Does the dialing signals appear between a TBl LINE terminal on AUX PC bo...

Page 200: ...ear between a Junction JC3 on the NCU PC board No See attached Figure 6 1 2 c Yes Does a relay RL2 operate properly on the NCU PC board Yes c Yes corrector lead Does a relay RL3 operate properly on th...

Page 201: ...le equalizer with mode a DIP Switch S2 on the AUX 181 PC board No Switch Combination Equalizer Volume 52 4 sz 5 IdBl OFF OFF 0 OFF ON 4 3 0 ON OFF a v O N ON 12 t Was there an international FAX commun...

Page 202: ...Is there any improvement No Try the telephone line quality might be a poor v I l Try to replace the MODEM PC Doara The problem has might been MODEM PC board 6 15...

Page 203: ...panel Yes Is the OFF HOOK detection set as OFF Yes IS the leased line set Is the off hook Does the sional Adjustthe potentiometer RVl for See sub item 5 1 1 in Chapter 5 Does the signal I Yes appear...

Page 204: ...FF 8 O N ON 12 I B Try to set the receiving power level with a Junction JC6 on the NCU PC board v The reference circuit diagram is shown below IN I lunction JC6 Receive Level Range Open Factory Settin...

Page 205: ...o DIS time interval adjustment Is there any improvement Yes 1 Do the technical orooram 1 setting and then prek q m That is to try to start from 4800 bps Is there any improvement l Try to replace the M...

Page 206: ...ting the Power Supply Unit lOOVs ide 1 input 90 to 132 VAC to the inlet 200 V side 1 Input 190 to 250 VAC to the inlet Turn on the AC power switch 1 DCvoltage check between C6fB and C70 1 12 V output...

Page 207: ...ween I No 0 and Q and between 0 aMTe fCN3 I PRE HEAT 29 of CN 1 it T e L H I Yes Fluorescent lamp lighting circuit check Connect a fluorescent lamp to CN3 Short circuit and ofCN1 for 2 seconds open th...

Page 208: ...Chopper regulator lC21 Destroy Check Metal plate cement resistor R21 Check Potentiometer VR21 Check Electrolytic Capacitor C22 C24 C25 Check Capacitor C23 Check F R Diode D25 Check Inductor L21 4 Chec...

Page 209: ...resistor R31a b Check Potentiometer VR24 25 Check Inductor L25 Check Electrolytic Capacitor C31 33 34 Check Capacitor C32 8 Check Transisitar TR22 Check Carbon resistor R32 33 9 Check F R Diode D27 2...

Page 210: ...ooting Non feed Document Document is set on the document Operate the ADF Test of self diagnosis Technical program setting No 78 1Yes l Check whether the side cover is properly closed l Replace the pla...

Page 211: ...Note No INo 6 2 4...

Page 212: ...6 2 2 Multi Feeding Two or more documents are fed at one time J I Operate the ADF Test of self diagnosis Technical program setting No 78 Check for the separate rubber 6 2 5...

Page 213: ...Documentlam Check the original travel surface Foreign matter such as paper waste and scotch tape remains on original travel surface requirements of the Manual Thoroughly correct the curled original No...

Page 214: ...6 2 4 Document Skew Put a smaller original in the carrier sheet and fed them together 6 2 7...

Page 215: ...6 2 5 Recording Paper Jam Paper jams on the way and stays inside Operate the Paper Cutting Test of 1 self di gnws 1 Techntcal program settmg No 79 I NO I I 6 2 8...

Page 216: ...6 2 6 Recording Paper Skew Printed paper skews II Operate the Send Receive Motor Running Test of self diagnosis Technical program setting No 80 6 29...

Page 217: ...6 2 7 Automatic Cutter Malfunction II Paper is not cut I Operate the Paper Cutting Test No Place cutter lever in position r qq 6 3 0...

Page 218: ...6 2 8 Cutter Alarm This alarm ii displayed on the LCD t Automaticcutterfails to find home position Make sure the cutter lever is well connected with the link 6 3 1...

Page 219: ...6 2 9 HeatAlarm This alarm is displayed on the LCD Thermal head over heated I HEAT ALARM 0 Thermal head overheat Allow it as it stands until it recovers naturally Recovery About 10 min 6 3 2...

Page 220: ...C H A P T E R 7 DISASSEMBLY ASSEMBLY P...

Page 221: ...embly 7 5 FrontCover 7 7 FluorescentLamp 7 10 OPE M PC Board 7 12 MODEM PC Board 7 13 NCU PC Board 7 15 MCNTZ PC Board MCNTl PC Board RR PC Board MB PC Board 7 16 SideCover PCl PC2 OPE 5 PC Board 7 20...

Page 222: ...hould temporarily be attached to their original positions When handing items such as circuit boards do not wear gloves that are likely to generate static electricity Do not place printed circuit board...

Page 223: ...7 2 General Mechanical Structure The general mechanical structure of the OKIFAX OF 38 is shown in Figure 7 2 1 and Figure 7 2 2 7 2...

Page 224: ...OPE 5 DOCUMENT TABLE LAMP FEED ROLLER U P U RECORDING PAPER OWER SUPPLY INIT J C U T T E R EXITING ROLLER Fig 7 2 1 OKIFAX OF 38 mechanical...

Page 225: ...f 3z _ d 7 4...

Page 226: ...plains how to disassemble and perform assembly in accordance with the following disassembly procedures The Figure 7 3 shows the disassembly procedure flow as the generalization The detailed disassembl...

Page 227: ...start 7 3 1 I Front C o v e r t 0 3 9 3t 7 3 14 I AUX PC Board r f 1 item numberfordetaileddelcription Fig 7 3...

Page 228: ...7 3 1 Front Cover 1 Disassembly procedure 1 Push a Release Lever with a thumb Fig 7 3 1 1 2 Open the Compartment Cover with your hand And remove a screw 0 COMPARTMENT COVER Fig 7 3 1 2 7 7...

Page 229: ...3 Remove the two screw 0 nSCREWS I Fig 7 3 1 3 4 Remove the two screws 0 Ground cable GROUND CABLE SCREW Fig 7 3 1 4 7 a...

Page 230: ...Fig 7 3 1 5 2 Reassembly procedure Reverse the each disassembly procedures Holding the cover and push backward the lever with a thumb of right hand Make sure that the release lever can operate normall...

Page 231: ...rocedure 1 Disassemble the Front Cover Sub item 7 3 1 2 Remove a screw on a Fluorescent Lamp Bracket LAMP BRACKET Fig 7 3 2 1 3 Remove the Fluorescent Lamp Bracket and pull out the lamp to foreground...

Page 232: ...2 Reassembly procedure Reverse the each disassembly procedures Caution Do not mis set the aperture direction of the lamp Read the Caution Label 7 1 1...

Page 233: ...Front Cover Sub item 7 3 1 2 Remove the four screws SCREWS SCREWS OPE M PC BOARD Fig 7 3 3 1 3 Remove a Front Cover L Remove the two screws 7 FRONT COVER L SCREW SCREW OPE M PC BOARD Fig 7 3 3 2 2 Rea...

Page 234: ...7 3 4 MODEM PC Board 1 Disassembly procedure 1 Disassemble the Front Cover Sub item 7 3 1 2 Remove a screw and a screw And remove a Standing Plate STANDING PLATE Fig 7 3 4 1 7 1 3...

Page 235: ...3 pull out the board MODEM PC BOARD Fig 7 3 4 2 Fig 7 3 4 3 MODEM PC board 2 Reassembly procedure Reverse the each disassembly procedures 7 1 4...

Page 236: ...screw referring Figure 7 3 4 1 3 Remove the two screws 0 And remove a Standing Plate CONNECTOR CABLES STANblNG PLATE Fig 7 3 5 1 4 Disconnect the three connector cables 12 5 Pull out the board Fig 7 3...

Page 237: ...Front Cover Sub item 7 3 1 2 Disassemble the MODEM and the NCU PC boards Sub items 7 3 4 and 7 3 5 RR PC BOARD CABLE CONNECTORS MB PC BOARD Fig 7 3 6 1 3 Disassemble the MCNTZ PC board 4 Disconnect t...

Page 238: ...sassemble the MCNTl PC board e Disconnect a cable connector b The board can be removed by lifting up CABLE CONNECTOR MCNTl PC BOARD POTENTI OMETER MB PC BOARD Fig 7 3 6 3 Fig 7 3 6 4 MCNTl PC board 7...

Page 239: ...5 Disassemble the RR PC board a Disconnect a cable connector 0 b The board can be removed by lifting up CABLE CONNECTOR RR PC BOARD MB PC BOARD Fig 7 3 6 5 Fig 7 3 6 6 RR PC board 7 18...

Page 240: ...onnect the five cable connectors 8 MB PC BOARD CABLE CONNECTORS Fig 7 3 6 7 b Remove the four screws 0 SCREWS j MB PC BOAitD Fig 7 3 6 8 Fig 7 3 6 9 MB PC board 2 Reassembly procedure Reverse the each...

Page 241: ...Board 1 Disassembly procedure 1 Disassemble the Front Cover Sub item 7 3 1 2 Disassemble the Side Cover L 4 Remove a Shoulder Screw SIDE COVER L SHOULDER SCREW Fig 7 3 7 1 b Remove the two screws SCR...

Page 242: ...cl Remove the two screws SIDE SCREWS Fig 7 3 7 3 d The cover can remove asthe following figure COVER Fig 7 3 7 4 7 21...

Page 243: ...sassembly After remove the Side Cover L a PC1 and PC2 can remove from the machine PC1 PC2 Fig 7 3 7 5 4 OPE S PC Board disassembly a Remove a screw 0 after remove the Side Cover L SIDE COVER L Fig 7 3...

Page 244: ...and also disconnect the two connectors OPE 5 PC BOARD Fig 7 3 7 7 d Remove the three screws and the board can be removed from the coyer SCREWS Fig 7 3 7 8 2 Reassembly procedure Reverse the each disas...

Page 245: ...nt Width Detection Switches 1 Disassembly procedure 1 Disassemble the Front Cover Sub item 7 3 1 2 Disassemble the Compartment Cover a Remove a screw 0 COVER SCREW Fig 7 3 8 1 b Remove a screw Fig 7 3...

Page 246: ...nnect a connector then the cover can remove from the machine Fig 7 3 8 3 3 Document Width Detection switches assembly a Remove a screw after removed the Compartment Cover COMPARTMENT COVER Fig 7 3 8 4...

Page 247: ...b The Document Width Detection switches can be removed by lifting Up from it DOCUMENT WIDTH DETECTION SWITCHES Fig 7 3 8 5 2 Reassembly procedure Reverse the each disassembly procedures 7 2 6...

Page 248: ...1 Open the Compartment Coverwithyour hand And remove a screw COMPARTMENT COVER Fig 7 3 9 1 2 Remove a screw 8 then the Rear Cover can remove from the machine Fig 7 3 9 2 2 Reassembly procedure Revers...

Page 249: ...1 2 Disassemble the Rear Cover Sub item 7 3 9 2 Lift up the Side Cover R and shift the cover backward The cover can be removed from the machine SIDE COVER R Fig 7 3 10 1 4 Power supply unit assembly...

Page 250: ...b Disconnect a Connector POWER SUPPLY UNIT Fig 7 3 10 3 d Also disconnect a connector CONNECTOR POWERSUPPLY UNIT Fig 7 3 10 4 2 Reassembly procedure Reverse the each disassembly procedures 7 29...

Page 251: ...embly 1 Disassembly procedure 1 Disassemble the Front Cover Sub item 7 3 1 a Disassemble the Rear Cover Sub item 7 3 9 3 Remove a Shoulder Screw SHOULD SCREW Fig 7 3 11 1 4 Remove the two screws SCREW...

Page 252: ...5 Remove a screw 0 SCREW 6 Remove the two screws Fig 7 3 11 3 SCREWS BOARD Fig 7 3 11 4 7 31...

Page 253: ...HO DING PLATES Q Fig 7 3 11 5 8 Take out the Thermal Head Assembly as the figure Remove a screw 38 then the Thermal Guard can be removed from the 0 assembly Disconnect the two connectors THERMAL GUAR...

Page 254: ...e machine Fig 7 3 11 7 Thermal head assembly 2 Reassembly procedure 1 Reverse until step 8 of the disassembly procedure 2 Set a portion A into a portion 8 In this case the springs must be on the Therm...

Page 255: ...3 After clcm the Cable holding Plates set the assembly correctly as the figure l 4 Reverse the remaining of the disassembly procedures 7 3 4...

Page 256: ...rd 1 Disassembly procedure 1 Disassemble the Front Cover Sub item 7 3 1 2 Disassemble the Rear Cover Sub item 7 3 9 3 Removea Shoulder Screw 41 0 SHOULDER SCREW Fig 7 3 12 1 4 Remove the two screws Fi...

Page 257: ...a connector on the SNS PC board CONNECTOR I SNS PC BOARD IMAGE ENSOR Fig 7 3 12 4 2 Reassembly procedure Reverse the each disassembly procedures However the optical adjustment is required by a service...

Page 258: ...d 1 Disassembly procedure 1 Disassemble the Front Cover Sub item 7 3 1 2 Disassemble the Rear Cover Sub item 7 3 9 3 Remove a Shoulder Screw SHOULDER SCREW Fig 7 3 13 1 4 Open a nail of the ADF Cover...

Page 259: ...5 Open a nail of the ADF Cover for removing ADF COVER NAIL Fig 7 3 13 3 6 The ADF Cover can be removed from the machine ADF COVER Fig 7 3 13 4 7 3 8...

Page 260: ...d from the machine BELTS AUX PC BOARD Fig 7 3 13 5 8 Feed rollers assembly Remove a Belt and the two Feed Rollers can be removed from the machine ADF ROLLER FEED ROLLER5 BELT Fig 7 3 13 6 2 Reassembly...

Page 261: ...3 14 AUX PC Board 1 Disassembly procedure 1 Disassemble the Rear Cover Sub item 7 3 9 2 Disconnect the three connectors AUX PC BOARD CONNECTORS Fig 7 3 14 1 3 Remove the screws 52 0 Fig 7 3 14 2 7 4...

Page 262: ...4 Remove a screw 0 53 the board can be removed from the machine AUX PC BOARD SCREW Fig 7 3 14 3 2 Reassembly procedure Reverse the each disassembly procedures 7 4 1...

Page 263: ...dure 1 Disassemble the Front Cover Sub item 7 3 1 2 Disassemble the Rear Cover Sub item 7 3 9 3 Disassemble the AUX PC board Sub item 7 3 14 4 Remove a Shoulder Screw SHOULDEP SCREW I Fig 7 3 15 1 5 R...

Page 264: ...e Pulse Motors Gear Box can open as the figure PULSE GEAR BOX Fig 7 3 15 3 7 Cutter unit assembly a Remove a Belt of the Cutter Refer to the above figure b Remove the four screws SCREWS Fig 7 3 15 4 7...

Page 265: ...Take out the Cutter Unit CUTTER UNIT Fig 7 3 15 6 Cutter Unit 8 Print roller assembly a Rotate the both side metal bushings about 90 degree either way and lift it up _ PRINT ROLLER Fig 7 3 15 7 7 4 4...

Page 266: ...TE 90 DEGREES LIFT UP Normal state After rotation Fig 7 3 15 8 b The roller can be pulled out as the figure METAL BUSHING Fig 7 3 15 9 2 Reassembly procedure Reverse the each disassembly procedures 7...

Page 267: ...Disassembly procedure 1 Disassemble the Front Cover Sub item 7 3 1 2 Remove a Shoulder Screw 0 Fig 7 3 16 1 3 Takeoutthe Separation Rubber SEPARATION RUBBER 2 Reassembly procedure Reverse the each di...

Page 268: ...CHAPTER 8 BRIEF TECHNICAL DESCRIPTION...

Page 269: ...oard NCU 181 7 Auxiliary PC Board AUX 181 8 Near End Sensor PC Board NESE 12 9 MODEM PC Board KV96 7 There are two types RR 18 RR lB 1M and RR lB 2M 2M is optinal Unit 1 Power Supply Unit PWU 181 Othe...

Page 270: ...OKIFAX OF 38 overall circuit diagram Fig 8 1 1 m _ n 111 I I 1 Cl...

Page 271: ...t j_1 I 1 I I 1 c I_ c 8 3...

Page 272: ...G3 data receiving etc 1 Copy Mode Data Signal Flow 2 G3 Data Send Signal Flow 3 G3 Data Receiving Signal Flow 4 G2 Data Send Signal Flow 5 G2 Data Receiving Signal Flow 6 300 bps Protocol Signals Flo...

Page 273: ...m I j jj Read hugeData _ _t PrintlmageData...

Page 274: ...1 I _ __ __ _ M B 1 Fig 8 2 2 _ OKIFAX OF 38 G3 data send signal flow...

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Page 279: ...This section explains the RS 232C interface connection in general 1 Encryption mode 2 External MODEM mode 3 Dump mode 4 ASCII printer mode All of the above mode connections are shown in Figure 8 3 1...

Page 280: ...I a 12...

Page 281: ...EM OF 38 SYNCHRONOUS MODE 9 6KI7 2Kl4 8K12 4K bps RS 232C RS 232C f l TO ANOTHER DTE I MUX MODEM MOD FAX NOTES 1 DATA TRANSMISSION RATE FOR PROTOCOL AND FAX MESSAGE BECOMES THE SAME 2 WITHOUT FALL BAC...

Page 282: ...80X SYNCHRONOUS MODE 9 6Kl7 2Kl4 8Kl2 4 bps RS 232C RS 232C PSTN NCU DUMP MODE J FAX NOTES 1 PROTOCOL NONE SAME AS 9136 s SCAN PRINT MODE 2 MESSAGE DATA A4 3 85kmn or 7 7Blmm 3 FLOW CONTROL EXTERNAL...

Page 283: ...r 1 A J a 15...

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