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OKIFAX OF-7, Field Service Handbook

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4.2.6

Image Sensor Test

Service personnel can check the direct image sensor and its associated circuits.

Operation:

LC Display shows:

l 

(Standby)

On?

No

Yes

Turn on the DIP

(See sub-item

 Sl-1 position.

 

Press the STOP

button.

l

Load any test chart on the feeder.

l

Press the SELECT FUNCTION key once.

l

Press 

q 

 then the test chart is copied and

additional short lines with intervals of

1 cm are marked on the left side of the

copy. Check 

 copy function, including

 sensor function. The marked short

lines can be used to check whether 

the

copied image is expanded (or reduced)
vertically or not.

 11

Summary of Contents for OF-7

Page 1: ...OKIFAX OF 7 Facsimile Transceiver Field Service Handbook 1 FIRST EDITION July 17 199O OKI ELECTRIC INDUSTRY COMPANY LTD ...

Page 2: ...ernational Standard Version Maintenance of the OF 7 is assumed to be conducted to the following levels l Component level maintenance for mechanical portion 0 Unit level maintenance for electric portion 0 Copyright 1990 OKI ELECTRIC INDUSTRY COMPANY LTD This manual is subject to alteration without prior notification ...

Page 3: ... General 3 4 DIPSwitchSl 3 5 SlideSwitchS2 3 7 Programming by Key Operation 3 8 Optional Settings 3 22 General 3 22 Polling Number Password Programming 3 23 Access Digit Programming 3 24 TWCSI Tel No Programming 3 25 TechnicalSet up 3 27 Line Monitor Acoustic Sound 3 31 Telephone and Line Connection 3 33 Frame Ground Connection 3 34 Accessory Installation 3 35 Thermal Recording Paper 3 35 Off Iine...

Page 4: ... Line Monitor Acoustic Sound Adjustment _ 5 2 Image Sensor Output Waveform Check ______ ______ _____ __ CHAPTER 6 TROUBLESHOOTING 5 l 5 l 5 3 5 5 5 7 5 7 6 1 Electrical Troubleshooting Flow Chart 6 1 6 1 1 Overall _ _ _ _ ______ _________ _________ ____ ______ __ ______ 6 l 6 1 2 NoGoodLCDOperation ______ _ _____ _____ _________ _______________ _ 6 3 6 1 3 LitAlarmLED _ _ ___ __ ____ _____________...

Page 5: ...t Exist Sensor 7 10 7 3 7 Separation Rubber Feed Roller 7 12 7 3 8 Print Roller Recording Paper Detector 7 14 7 3 9 Thermal HeadAss y _ _____ _ __ _ _ 7 16 CHAPTER 8 BRIEFTECHNICAL DESCRIPTION 8 1 PC BoardandUnit _ _________ _ _ __ ___________________________ B l Lab 8 1 1 PC Board ___ _______________ ______________ ____ _ _____________ ___ 8 1 8 1 2 U n i t 8 l 8 1 3 Overall Circuit Diagram 8 1 8...

Page 6: ...C H A P T E R I GENERAL INFORMATION ...

Page 7: ...CHAPTER 1 GENERAL INFORMATION 1 1 Features l l 1 2 GeneralAppearance l 2 ...

Page 8: ...ect contact image sensor 2 Sixteen halftone transmission 3 Ten one touch key for auto dialing 4 One specified time delay transmission 5 Access digit for PTT line 6 Automatic response delay for auto receive 7 Activity report print out 8 Acoustic monitor 9 Local diagnosis 10 Over heat protection l l ...

Page 9: ...al appearance ofthe OF 7 is shown in Figure 1 2 1 and Figure 1 2 2 below The operation control Panel of the OF 7 is shown in Figure 1 2 3 and Figure 1 2 4 Fig 1 2 1 General appearance frontview Fig 1 2 2 General appearance rear view 1 2 ...

Page 10: ...Fig 1 2 3 Operation control panel of the OKIFAX OF 7 Fig 1 2 4 Operationcontrol panel expansion 1 3 ...

Page 11: ...CHAPTER 2 SPECIFICATIONS ...

Page 12: ... design CCITT Group 3 facsimile transceiver 2 Applicable Telephone Line 1 GSTN General Switched Telephone Network 2 PBX extensions PBX Private Branch Exchange 3 Communication Mode Half duplex 4 Transmission Mode CCITT G3 mode 5 Document Size 1 Width Max 216 mm American lettersize Min 148 mm IS0 A5 size 2 Length Max 1000 mm Min 128 mm 2 l ...

Page 13: ...onal coding scheme MH Modified Huffman MODEM Transmission Time image 17 seconds 16 scale gradation Dither algorithm l Horizontal direction 8 pelslmm 2 Vertical directiqn a 3 85 lines mm STD b 7 7 lines mm FINE l High speed MO DEM a CCITT Rec V 29 9600 7200 bps b CCITT Rec V 27ter 4800 2400 bps 2 Low speed MODEM CCITT Rec V 21 channel 2 300 bps 1 CCITT Rec T 30 2 OKI special protocol 2 2 ...

Page 14: ...er the second 2400 bps transmission is attempted 1 One touch key 10 one touch keys are provided 2 Two digit location code 10 different location codes are avaiable 3 Full digit location Operator can use the Tenkey pad for a full digit location number Fixes the number of redial attempts in accordance with PTT parameter INT Lversion 2 tries fixed REDIAL key provided No limit on number of repeat attem...

Page 15: ... service personnel can select the sender ID print position that is inside or outside of the top of every reproduced page at the remote receiver 2 Sender ID data transmit or not User or service personnel can select the sender ID data transmit or not 2 Personal ID Upper 16 digits of the Sender ID are separately sent to the remote machine to indicatethe Personal ID 3 Poll TX Dpcument s set on the fee...

Page 16: ... or a call going out from PBX to a PTT line 2 5 Auto Receive Selectable on off by a key on the operation panel 26 Automatic Response Delay Service personnel can selectthe delaytime of automatic response time of the machine 1 ring and 5 seconds 30 seconds stepped by 5 seconds 27 Poll RX Polling Collection of message s from a remote station 4 digit password is provided 2 5 ...

Page 17: ...2 OK1 ELECTRIC OUE NG 635 11 06 OS 31 00 25 2 STOP 635 11 06 08132 00 26 OK1 ELECTRIC OUE 02 OK 635 11106 OS 33 00 12 OKI ELECTRIC OUE NG 635 11 06 OS 38 00 34 OK1 ELECTRIC OUE 03 OK 635 11106 08 51 01 14 OK1 ELECTRIC OUE 07 OK 635 11 06 OS 53 00 32 OK1 ELECTRIC O JE NE G3R 11106 09 15 00 25 OK1 ELECTRIC WE 01 OK G3R 11x06 09 lb 00 25 OK1 ELECTRIC OUE 01 OK G3R 11 06 09 18 00 25 OKI ELECTRIC OUE 0...

Page 18: ...mation Report format example CONFIRMRTION REPORT 11 06 90 05 43 OKI ELECTRIC OUERSEFIS lrlE S UF 00s 3 4321519 MODE ST ART TIME TIME OISTONT STQ I O POGE RESULT G3S 11106 OS 38 00 34 OK1 ELECTRIC OUE 03 OK CSM IWRh TIW REPORT 11 06 96 08 5E OKI ELECTRIC OUERSEFIS WE 8 WF 01 02 03 04 05 06 07 08 09 1 0 ONE TOLCH 01 03 432 1519 03 432 3218 03 432 3219 auTO OIQL 01 03 795 1644 02 03 799 7614 03 03 79...

Page 19: ...4 ZlOmm 1 Effective Reading Width One line Minimum Scanning One line Minimum Print Time Transmission Document 1 Thickness 10 millisecond for365 lines mm 5 millisecond for 7 7 lines mm 10 millisecond for 3 85 lines mm 5 millisecond for7 7 lines mm Automatic paper background sensing control is provided The Light and Dark contrasts low contrast is automatically enhanced to improve image quality The d...

Page 20: ... not be marked wrinkled or torn as a result of being sent throuth the feeder or scanner 38 Document Jam Detection 1 Within lm Transmission will stopand a line disconnectwill occur when the end of the document is not detected within lm after scanning begins 2 5 seconds Notice will be given if the document does not reach the scanning position within 5 seconds after the document feed begins 39 Docume...

Page 21: ...k Inside diameter of paper roll 25 4 1 or 0 mm Outside diameter of paper roll about 65 mm Type F220 KB Mitsubishi or equivalent 42 Skewing of Recording Paper The maximum allowable skew of the recording paper is 2 mm over a 30 meter roll of paper and f 1 mm over any advance of 2 meters 43 44 Indication of Remaining Recording Paper The remaining recording paper may be viewed through the window on th...

Page 22: ...r level 0 dBm to 15 5 dBm range Adjustable in 0 5 dB steps 3 Receiving power level a 6 dBm to 46 dBm range factory setting Germany b OdBmto 4OdBm factory setting without Germany c OdBmto 34dBm Adjustable by registor combinations Ring Detection Sensitivity 1 Voltage range 40 volts to 150 Vrms No operate below 17 volts 2 Frequency range 15Hzto68Hz 3 Ring voltage duration Longer than 180 240 msec In ...

Page 23: ...e range Nomiilue 1 Mini ylue t Maximum Value Volts 250 Note The power supply will work at 260 volts actually but the maximum value shows 250 volts according to PTT regulation 2 Frequency range 47 Hz to 63 Hz 3 Power consumption I Mode Typical Power VoltAmperes I I Transmit 60 VA I I Receive 60 VA I I Receive All Black 1 200 VA I I Copy Normal 85 VA I I Copy All Black 210 VA I I Standby 29 VA I 2 1...

Page 24: ...detect an overheating condition with the thermal print head s electrical current volume it will interrupt the reception as follows a Stop the printing b Generate an alarm tone c LC Display shows HEATALARM d Return a DCN signal after responded to EOPIEOMIMPS signal from the remote station As the overheating condition is removed by natural cooling the alarm message on LC display will be automaticall...

Page 25: ...conditions The MTBF will be based on 50 percent transmit and 50 percent receive activity 2 Thermal Print Head 3 Feeder Separation The separation rubber does not req uire replacement Rubber for at least 10 000 document feeds The life of any given element on the print head will be greater than 3 x 107 cycles One cycle is defined as the sequence required to print one black picture element 1 AC power ...

Page 26: ...262 I f Unit mm Fig 2 1 General appearance and dimensions of the OKIFAX OF 7 2 15 ...

Page 27: ...C H A P T E R 3 INSTALLATION ...

Page 28: ...__ _____________ _____ 3 7 3 6 4 Programming by Key Operation ________ ____ 3 8 3 7 Optional Settings 3 22 3 7 1 General _____ ___ _____ _ ______ __ ____ ___ 3 22 3 7 2 Polling Number Password Programming 3 23 3 7 3 Access Digit Programming 3 24 3 7 4 TSVCSI Tel No Programming 3 25 3 7 5 Technical Set up _ 3 27 3 7 6 Linelmpedance _______ ___ ___ ______ _____ _____ 3 31 3 8 Telephone and Line Conn...

Page 29: ...3 11 Off line Test 3 37 3 11 1 Check Items 3 37 3 11 2 Oaeration Procedure 3 37 3 12 Off line Test 3 38 3 12 1 General 3 38 3 12 2 Reception 3 38 3 12 3 Transmwon 3 39 ...

Page 30: ... 3 1 General The following flow chart shows the general installation procedure 1 Siteseiectiy 1 1 Unpackin 1 I Initial settings I i Optional settings Telephone and line Accessories installation Off line test On line test 3 l ...

Page 31: ...te the machine shall not have any large electrical noise producing machines nearby Unpacking Unpacking Procedure 1 Remove the tape from the top of the cardboard box and open its covering panels 2 Lift the OF 7 machine out of the box 3 Remove the Packing Cushions of both sides 4 Remove the plastic wrapper PACKING CUSHION RIGHT OF 7 MACHINE PACKING CUSHION PLASTIC WRAPPER CARDBOARD BOX AC POWER CORD...

Page 32: ...low Table 3 4 Contents list Item No Contents Name 1 OKIFAX OF 7 Facsimile Transceiver 2 AC Power Cord 3 Thermal Recording Paper 4 U ser s Gu ide Q ty 1 1 1 1 vol I Remarks i 3 5 AC Cord Connection Connect the accessory AC power cord to the AC inlet of the machine Connect the cord to an AC power source AC POWER SWITCH Fig 3 5 1 AC connection 3 3 ...

Page 33: ...1 2 4 8 dB NW 16C No 1 2 3 4 5 6 7 Table 3 6 2 Programming byTen key operation Name of Function Setting Reference Sub item Adjusting calender and clock 3 6 4 1 PTTspecification parameters 3 6 4 2 Auto dial parameters PBXfacility Dial type N N l 10 N Dial pulse make ratio 33 39 50 Length of tone duration 75 85 l 00 ms Configuration setting Sender s ID transmission Sender s ID print position Active ...

Page 34: ...3 6 2 DIP Switch Sl 1 2 Remove the screw 0 TheCap can be removed Fig 3 6 2 1 The DIP switch Sl on the MCNT 16 PC board can see in the figure below I n Fig 3 6 2 2 DIP switch 51 location 3 5 ...

Page 35: ...hnical setting and maintenance applicable line and telephone set i e DP Dial Pulse PB Push button for auto dialing telephone number To perform back to back testing of the OKIFAX series machine without using 51 7 Not used Remote 51 8 maintenance Enable Disable To perform the remote maintenance at factory use factory 3 6 ...

Page 36: ...ew The Cap can be removed CAP Fig 3 6 3 1 2 The ATT DIP switch on the NC l 6C PC board can see in the figure below ATT DIP SWITCH Expand figure e g Set volume 10 dB Fig 3 6 3 2 3 Set the sending power level by the switches combinations 3 7 ...

Page 37: ...3 6 4 Programming by Key Operation Figure 3 6 4 shows the general procedure for key operation 3 8 ...

Page 38: ... a I c 5 3 9 ...

Page 39: ...ndby LC Display shows a Press the SELECT FUNCTION key once a Press q on the Ten key pad a Adjust the date and time by using the Ten key pad a After making the setting pressthe START button to register 0 Press the STOP button to return to standby condition ENTER DDMMYYHHMM ENTER DDMMYYHHMM 3112892259 I 3 1 0 ...

Page 40: ...pad Press q q on the Ten key pad 0 Press the START button Ol 071 NO 02 ENTER NO START Press q on Ten key pad to your desire position by referring the following information Note The desire position can get by pressing q arm on Ten key pad LC Display shows 1 l L default condition of 10000000 INT L version Belgium U S A Australia International A Sweden Norway U K International 0 Press the START butto...

Page 41: ...UNCTION key once Press q on the Ten key pad Press q q on the Ten key pad Press the START button A I 00000000 l Press q to your desire position by referring the following information Note The desire position can get by pressing q or q on Ten key pad LC Display shows Austria earthing Swi tzerland Netherland 0 Press the START button to register 31 12 89 22 59 I 3 1 2 ...

Page 42: ...Table3 6 4 PTT parameter 3 13 ...

Page 43: ...4 1 Dial pulse make I Iratio T able 3 6 5 Auto dial parameters Description To select On Off in accordance with the applicable telephone line To select the Hyphen as a pause or a parameter change To select the dial pulse type in accordance with your PTT requirment NormalllO Normal Normal 1 To select the dial pulse make ratio in accordance with your PTT requirement 33 39 50 type is one of multi sign...

Page 44: ...Standby l Turn on the DIPswitch Sl 1 See sub item 3 6 2 and press the STOP button for setting l Press the SELECT FUNCTION key once Press q on the T key pad i I l Press q q on the Ten key pad l Press the START button ENTER NO START i to next page 3 1 5 ...

Page 45: ...Operation LC Display shows Press q to your desire position by referring the following information How to use Hyphen 1 Pause 0 Parameter change PTT or PBX selection 1 PBX 0 PTT l Press the START button to register c22 59 I 3 1 6 ...

Page 46: ...ng information Note The desire position can get by pressing mar q on Ten key pad LC Display shows 1 transmit 0 no transmit side can select 1 Inside 0 Outside Automatic output of Activity report 1 available 0 not available Auto redial 1 available 0 not available 1 31 12 89 22 59 I I I I 10111000 Key touch tone volume 1 loudly 0 normal Not used Automatic paper feed after reception end 1 no feed 0 fe...

Page 47: ... Operation LC Display shows l Standby j 31i12i8 5g j i l Pressthe SELECT FUNCTION key once Press q on the Ten key pad Either press a One touch key out of ten One touch key No 1 to No 10 or a two digit abbreviate codes 01 to 10 e g a One touch key No 6 Press the key No 6 code 08 on the Ten key pad ENTER NO START ENTER NO START l Press the START button Note The data is displayed if registered and bl...

Page 48: ... AUTO DIAL key q AUTO REVVOICE REQUEST key q B m l After setting the number press the START Ol 101 N O button to register ENTER NO START Either specify a One touch key or two digit abbreviated code Press the STOP button to return to standby condition LC Display shows 1 31 12 89 22 59 1 3 19 ...

Page 49: ...CTION key once Press q on the Ten key pad Note Thedata isdisplayed if programmed and blank is displayed if not programmed l Program the Sender s ID data by using the conversion table SeeTable 3 6 2 e g OKI OVERSEAS 01 Sender s ID 0 K I Space 0 V E R 5 E A S Space 0 1 Key Operation 0 After making the setting pressthe START button to regtister 0 Press the STOP button to return to standby condition L...

Page 50: ...044 045 046 047 058 059 060 061 Display Character 3 digit Code 064 A 065 6 066 C 067 D 068 E 069 F 070 c 071 H 072 I 073 J 074 K 075 L 076 M 077 N 078 0 079 P 080 Q 081 R 082 s 083 T 084 U 085 T t Display Character V w X Y 2 Y 1 A a P A 6 ij R A 0 e Q 0 3 digit Code 086 087 088 089 0 9 0 091 092 093 094 095 096 097 098 099 100 110 111 112 113 114 115 1 3 2 1 ...

Page 51: ...assword programming 2 Accessdigit programming 3 TSKSI telephone num ber programming Technical set up 1 MODEM transmission rate 4 Control of accoustic line monitor Ignoring 1st DIS Ring response time Technical set up 2 5 Density of home position Protective transmission V27 Protective transmission V29 Technical set up 3 6 Subscriber line EQL TX Subscriber line EQL Rx Table 3 7 2 Setting on PC board ...

Page 52: ... code which does not check the code Operation LC Display shows l Standby l Press the SELECT FUNCTION key once Press q on the Ten key pad Note The 0000 data currently registered is display l Program the 4 digit password e g 1 2 3 4 l Press the START button to register l Press the STOP button to return to standby condition 1 ENTER PASSWORD 1 I 1234 I ENTER PASSWORD 1 31 12 89 22 59 3 23 ...

Page 53: ... key once Press q m on the Ten key pad I Press q q tom q as referring the following information q iJ Numberoftheaccessdigit Upto4digit q L Iiil 7 Accessdigit FJm Redial times Int l 2 times fixed q J Redial interval l l 3 min fixed Note a Above setting only 1 digit can be input in the operation mode b Above the redial times and redial interval can be entered if the PTT parametersetting inas U S A l...

Page 54: ...y l Pressthe SELECT FUNCTION key once Press q m on the Ten key pad Note The data isdisplayed if programmed and blank is displayed if not programmed l Program the installed machine s telephone number e g 0081 3 4321519 l Tousetopress q Ba for a space l Press the START button to register 0081 3 4321519 l Pressthe STOP button to return to standby condition 3 12 89 22 59 1 3 2 5 ...

Page 55: ...ormed by user side or service personnel 51 4 OFF User side 51 4 ON Service personnel Before programming TSVCSI check that the Si 1 state meets the 51 4 state IncasethatSl 4isOFF y No 1 TurnoffFSl 1 Preess the STOP button G Go to TSVCSI Programming In case that 51 4 is ON Preess the STOP Goto TSVCSI Programming 3 2 6 ...

Page 56: ... the delay time of the automatic time response of the machine 5 Density of home To select the default state for the document position density of home position 6 Protectivetone To select the default state for transmission of transmission the protective tone 1800 Hz against echo against echo suppressor suppressor 3 7 5 2 V27 MODEM 7 Protective tone To select the default state for transmission of tra...

Page 57: ...pad to your desire position by referring the following information Note The desire position can get by pressing q orm on Ten key pad LC Display sl OOO Ignoring 1st DIS signal LC Display shows 31 12 89 22 59 ENTER NO START ENTER NO START Transmission rate 1 4800 bps 0 9600 bps Control of acoustic line monitor 1 notavailable 0 available N A 1 lgllor 0 Identify Gap between CED and DIS signal 1 75ms 0...

Page 58: ...s the START button Press q on Ten key pad to your desire position by referring the following information Note The desire position can get by pressing mar q on Ten key pad LC Display s b I 31 12 89 22 59 ENTER NO START ol 071 NO 05 ENTER NO START I I 00100000 I Transmit echo suppress tone V27 1 Tansmit 0 No transmit Transmit echo suppress tone V29 1 Tansmit 0 No transmit N A Press the START button ...

Page 59: ...e START button Press q on Ten key pad to your desire position by referring the following information Note The desire position can get by pressing q arm on Ten key pad LC Display shows I N A N A N A N A Equalize selection RX Okm 11 8km13 6km17 2kmI 1 Equalize selection TX L I Cable Length Press the START button to register LC Display shows 31 12 89 22 59 ENTER NO START ENTER NO START I 00010000 II ...

Page 60: ... a potensiometer RV3 on the MCNT 16 PC board if the slide switch adjustment is not enough SLIDE SWITCH Fig 3 7 6 1 1 Adjusting procedure a Open the Scan Print Assembly by referring the disassembly procedure in Chapter 7 b The MCNT 16 PC board can be seen as below MCNT 16 PC BOARD Fig 3 7 6 2 3 3 1 ...

Page 61: ...c The potensiometer RV3 can be found as below and turn to clockwise for increasing sound POTENSIOMETER RV3 MODEM i _ i Fig 3 7 6 3 MCNT 16 PC board 3 3 2 ...

Page 62: ...elephone set and the applicable line by following the procedures below 1 Remove the scn 0 The Cap can remove from the machine CAP SCREW 0 Fig 3 8 1 2 The telephone set and the terminal line can be seen in the figure below TELEPHONE SET TELEPHONE LINE Fig 3 8 2 3 3 3 ...

Page 63: ...3 9 Frame Ground Connection Service personnel can connect a frame gound cable to an earth if necessary FRAME GROUND CONNECTION POINT Fig 3 9 1 3 3 4 ...

Page 64: ...e Paper Compartment Cover can open by a hand COMPARTMENT Fig 3 10 1 2 Set the thermal recording paper roll in the figure below THERMAL RECORDING PAPER ROLL LEVER Fig 3 10 2 3 Pull the Paper Release Lever See above figure 3 10 2 toward the front of the machine 3 3 5 ...

Page 65: ... the paper guide and between the print roller 5 Reverse the Paper Releaser Lever to the normal position and close the cover 6 Pull the top position of the paper as the figure below 7 The paper can tear along the Cutting Edge EDGE Fig 3 10 3 3 3 6 ...

Page 66: ...nce Press q on the Ten key pad then immediately some checker patterns will be printing We can check the printed quality as well as ROM version Press the select FUNCTION key once again Press q on the Ten key pad then immediately we can check the ROM s hash test result 2 Local copying The user or service personnel can do local copying as an off line test a b d Note Set document s on the document sta...

Page 67: ...until theSTOP button is pressed The audible alarm will continue until the STOP button is pressed or the handset is hooked on Set a document on the ADF stacker press the COPY key and remove the document before it is fed into the machine Make sure that the alarm lamp lights Note Press the STOP button to reset the alarm 3 12 2 Reception 1 Call the installed machine with anothertelephone and make sure...

Page 68: ...o an installed machine with a G3 mode 2 Do not replace the telephone handset during transmission Make sure that The audible alarm sounds at the end of transmission and that it continues until the handset is replaced 3 Check the transmitting operation 3 39 ...

Page 69: ...C H A P T E R 4 MAINTENANCE ...

Page 70: ... 2 3 High or Low Speed MODEM Transmission or Reception Test 4 6 4 2 4 PESendTest _______________ _____ _______ ________ _ 4 8 4 2 5 PrintTest _____ ____ ___ ________ 4 9 4 2 6 ImageSensorTest ____ ________ _ ____________ 4 11 4 2 7 ROMTest __ __________________________ _______ __ 4 1 2 4 2 8 RAMTestandClear __________ _ 4 13 4 3 LCDisplayDatainErrorState _____________ _______ 4 1 4 ...

Page 71: ...ine inspection Item No Inspection kern I 1 I Scan roller I 2 1 Printroller 3 I I Separationrubber I 4 I ADF roller Direct contact image sensor Description Clean with ethyl alcohol Reference Item No in Figure4 1 1 0 Clean with ethyl alcohol I If transmitted pages arecounted more than 10 000 times replace the rubber Clean the surface of the sensor glass with cloth I c3 Clean it with cloth damper alc...

Page 72: ...CORDING PAPER RUNNING ROUTE DOCUMENTFEEDING ROUTE RECORDING PA PARATION RUBBER CAN ROLLER POW6RSUPPLY UNIT MCNT PC BOARD ddF ROLLER i T CONTACT IMAGE sEN OR THERMAL PRINT HEAD Fig 4 1 1 Routine inspection ...

Page 73: ... using these test functions Test items 1 2 3 4 5 6 7 8 LED test on the operation panel Tone test High speed or low speed MODEM send or receive test PB Multi frequency MF tone test Print test Image sensor test recording paper feeding test ROM test RAM test and RAM clear 4 3 ...

Page 74: ...tand by c 31 12 89 22 59 I DIPSW Sl 1 On7 Yes Turn on the DIP See sub item switch 51 l position 3 6 2 0 Press the SELECT FUNCTION key once l Press q then all LEDs on the operation panel can be lit intermittently until press the STOP button 0 Press the STOP button to return to standby condition i 31 12 89 22 59 4 4 ...

Page 75: ...1 Press the STOP button I Press the number keys to select frequency See table below then transmit the tone until free of the key Number of Key Frequency Hz1 El 2100 lz 1850 l 1650 q 1080 w 462 I Press the SELECT FUNCTION key once l Press q 31 12 89 22 59 FUNCTION G TONE TEST ENTER 1 2 3 4 5 I 0 Press the STOP button to return to standby condition 1 3i i2 89 22 59 1 4 5 ...

Page 76: ...89122 59 See sub item 3 6 2 1 switch Sl position l Press the SELECT FUNCTION key once l Press q then the machine can connect to the telephone line l Press the number of key to select mode See table below Numberof Key Mode 300 bps sending Notes 1 count seconds 00 to 59 2 AAAA error bits counter 3 After counted seconds 59 restart from 00 until press the STOP button H L MODEM TEST ENTER 12345 67 I fo...

Page 77: ... 0 data will be used for check TX C LCD Shows 1 1 I l Press 1 5 key LCD Shows 0000 MODEM rate nn Test time sec Show 0 sec to 59 sec next of 59 show 00 l Press the STOP button LCD Shows l Press the STOP button 51 DE RX SIDE CML CML ON ON Traininn CML OFF CML OFF To Stand by To5 LCD Shows l Press 6 or 7 key LCD Shows TRCD ON 0000 MODEM rate AA Test time set 1 Show 0 sec to 59 sec next of 59 show 00 ...

Page 78: ...No Yes I Turn on the DIP See sub item switch Sl 1 position 3 6 2 1 Press the STOP button I v 1 39 22 59 I l Press the SELECT FUNCTION key once 31 12 f r FUNCTIOE l Press q then the machine can connect to the telephone line l Press select number of keypad 0 to 9 and for sending PB tone l Press the STOP button to return to standby condition 4 8 ...

Page 79: ...on LC Display shows a Standby 31 12 89 22 59 I Yes See sub item 3 6 2 Press the STOP 1 button 0 Press the SELECT FUNCTION key once a Press q the OF 7 can print test paterns The printed sample is shown in the figure 4 2 1 See next page 22 59 I TEST PRINT Printing I I 31 12 89 22 59 Note In addition to the test patterns the ROM version and the hash data of the ROM are also printed 4 9 ...

Page 80: ...R O M UER 3004 HASH E252 Fig 4 2 1 Sample of the printed data 4 10 ...

Page 81: ...ion 3 62 Press the STOP button l Load any test chart on the feeder l Press the SELECT FUNCTION key once l Press q then the test chart is copied and additional short lines with intervals of 1 cm are marked on the left side of the copy Check tfie copy function including the sensor function The marked short lines can be used to check whether the copied image is expanded or reduced vertically or not K...

Page 82: ...eration LC Display shows l Standby D isl No Yes Turn on the DIP See sub item switch Sl 1 position 3 6 2 I l Press the SELECT FUNCTION key once l Press q then ROM testwill be started l After the checked the machine will return to standby condition automatically in about 3 seconds 1 3i i2 89 22 59 FUNCTION I 4 12 ...

Page 83: ... I I l Press the SELECT FUNCTION key once l Press q 0 Press aor FJ Yes No Caution If press the q the registered back up RAM data is cleared Note If the result is NG the LCD will show NG and stop immediately After the checked and cleared if the result is okeyed the machine will return to standby condition automatically in about 3 seconds 1 31 12 89 22 59 FUNCTION I RAM TEST CLEAR YES NO I 2 RAM TES...

Page 84: ...he thermal head over heated alarm isgenerated Thirdirplayoccurswhenthe paper near end alarm is generated on the FTZ version Thisdirplayoccurswhen the paperendalarm isgenerated on version other than FTZ This display occurs when the send documentisjamming This display occurs when transmission or reception fails This display ocwrs if no data is registered in pressed One touch Dialing key or Auto Dial...

Page 85: ...CHAPTER 5 A D J U S T M E N T ...

Page 86: ...s 5 1 5 1 1 Ringing Signal Detection Sensitivity 5 1 5 1 2 Dial Tone and Busy Tone Detection Level 1 5 3 5 1 3 Dial Tone and Busy Tone Detection Level 2 5 5 5 1 4 Line Monitor Acoustic Sound Adjustment 5 7 5 2 image Sensor Output Waveform Check 5 7 ...

Page 87: ...signal can be appeared at the IC6 5 pin when a ringing signal of 20 Hz at 25 V is input to the line terminals and The Ring incoming signal can not be appeared atthe IC6 5 pin when a ringing signal of 60 Hz at 17Visinputtothe lineterminals F r e q u e n c y Hz Control RVl potentiometer Required tool Oscilloscope Ringing oscillator 1 Measurement a Connect an oscilloscope probe between the IC6 5 pin ...

Page 88: ...2 RVl Control 1 pin Fig 5 1 1 Ringing signal detection sensitivity measurtiment pointson the NCU 16C 2 Adjustment Use the RVl potentiometer on the NCU 16C to adjust the sensitivity if necessary See Figure 51 1 5 2 ...

Page 89: ...ecomes Low 0 VI when a tone of 400 Hz at 31 5 dBm is input to the line terminals and The IC6 8 pin reading becomes High 5 V when a tone of 400 Hz at 33 5 dBm is input to the line terminals f Control RV2 potentiometer Required tool Oscilloscope Oscillator Attenuator 1 Measurement a Connect an oscilloscope probe between the IC6 8 pin and the IC6 1 pin See Figure 5 1 2 at next page b Connect the lead...

Page 90: ...6C to adjust 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 V d Make sure that the output signal on the oscilloscope becomes High 5V when the attenuator is set to 33 5 dl3 and Low 0 V when the attenuator is set to 31 5 dB 5 4 ...

Page 91: ...400 Hz at 25 0 dBm is inputto the line terminals and The IC6 6 pin reading becomes High 5 VI when a tone signal of 400 Hz at 27 0 dBm is inputto the line terminals Input Level dBml Control RV3 potentiometer Required tool Oscilloscope Oscillator Attenuator 1 Measurement a Connect an oscilloscope probe between the IC6 6 pin and the IC6 1 pin See Figure 5 1 3 at next page j b c Connect the leads of t...

Page 92: ...U 16C to adjust 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 changesfrom High 5V to Low OV d Make sure that the output signal on the oscilloscope becomes High 5 V when the attenuator is set to 27 0 dB and Low 0 V when the attenuator is set to 25 0 dB 5 6 ...

Page 93: ...rsonnel can check the output waveform of the Image Sensor PC board name Check points Check voltage MCNT 16C TP6and TPG7 Ground See Figure 5 2 2 Falls by more than 650 mV from 2 9 V The example waveform is shown below Fig 5 2 1 Image Sensor Output Waveform all white document Instrument Oscilloscope f _ _ _ _ _ _ I I I I I I I f MODEM I I L _ _ _ _ _ i TPG7 Ground MCNT 16 I TP6 Fig 5 2 2 Image Senso...

Page 94: ... all white color document on the document feeder l Press the SELECT FUNCTION key once l Press q and i Jon the Ten key pad NOTES The document will be fed and we can check the output waveform of the image sensor LC Display shows CL3 31 12P39 22 59 S 8 ...

Page 95: ...CHAPTER 6 TROUBLESHOOTING ...

Page 96: ...Overall 6 l No Good LCD Operation 6 3 LitAlarmLED 6 5 A b n o r m a l P r i n t o u t 6 6 NoGoodLocalCopy ____ _ _______ __ __ __ 6 7 No Dial Tone Detection 1 6 9 NoAuto Dialing _ ______ _ ________ ____ __ 6 12 Transmission Communication Trouble 6 14 No Auto Reception 6 16 Reception Communication Trouble ___ _ _____ _____ ___ 6 1 7 ...

Page 97: ...or work shop people Electrical Troubleshooting Flow Chart Overall Turn on the AC power switch 1 J Does LC Pisplay operate properly No Is the ROMs check N O Operate the Print Test of the s e l f d i a g n o s i s See sub item 4 2 s in Chapter 4 t deplace a defective ROM IC3 on the MCNT 16 PC board 1 6 I ...

Page 98: ...In which mode doesthe trouble occur See the No Dial Tone Detection Isthe auto dialing See the No Auto Dialing Sub item 6 1 7 communication trouble Verify symptoms 6 2 ...

Page 99: ...splay Operation 1 Turn on the AC power switch Does the LC Display show the date time Yes Does the LC Display Does the DC 5 V Replace the OPE PC board Is the LC Display operation normal Replace the MCNT 16 PC board Yes T ...

Page 100: ...I TP7 IC5 MCNT 16 PC board TPGZ 6 4 ...

Page 101: ...OP b utton Does the ALARM LED go off Does the LC Display show COVER OPEN No Set the Paper Release Lever properly Y Does the LC Display show NO PAPER N o Set the recording paper correctly v Does the CC Display show HEAT ALARM No Wait about 10 min or more Y Replace the MCNT 16 PC board 6 5 ...

Page 102: ...IstheTP7observed t h e following waveform No Y Aye the Print Data appeared at the lC21 57 pin PDATA Yes Replace the IC20 on the MCNT 16 PC board Check connectors or replace a Thermal Head Ass y Unit Note TP7 test point isshown in Figure 6 1 1 on page 6 4 6 6 ...

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Page 115: ...C H A P T E R 7 DISASSEMBLY ASSEMBLY ...

Page 116: ..._______ _________ 7 3 7 3 2 PrintScanUnit ___ _______ _ _ 7 5 7 3 3 MCNTorNCUPCBoard ______ __ _ ____ ______ _____ 7 7 7 3 4 OPE PC Board __________ __________ ______ ____ ______ 7 9 7 3 5 PowerSupplyUnit ____ ________ ______ ____ _____ 7 9 7 3 6 Image Sensor Unit Document Exist Sensor 7 10 7 3 7 Separtion Rubber Feed Roller 7 12 7 3 8 Print Roller Recording Paper Detector 7 14 7 3 9 Thermal Head ...

Page 117: ...y should temporarily be attached to their original positions 3 When handling items such as circuit boards do not wear gloves that are likely to generate static electricity 4 Do not place printed circuit boards directly on the equipment or on the floor 7 1 2 Tools Table 7 1 shows the tools required for the replacement of parts such as circuit boards and mechanical units Table 7 1 Tools I r No 1 Ser...

Page 118: ...7 2 General Mechanical Structure The gene ral mechanical structure of the OKIFAX OF 7 is shown in Figure 7 2 1 7 2 ...

Page 119: ... 1 Remove the two screws 0 on the base Fig 7 3 1 2 Lift the Top Cover as holding if with both hands and slide it to the rear side The cover can be opened See Figure 7 3 3 RELEASE LEVER Fig 7 3 2 Note The Document Release Lever will be undone when the cover has been lifted up 7 3 ...

Page 120: ...t cable Q on the OPE PC board Fig 7 3 3 2 Reassembly procedure Reverse the each disassembly procedures Note The Document Release Lever s portion A should insertto the hole of metal lever B DOCUMENT RELEASE LEVER Fig 7 3 4 7 4 ...

Page 121: ...t Scan Unit 1 Disassembly procedure 1 Open the Top Cover Sub item 7 3 1 2 Remove a screw 0 and I SCREW Fig 7 3 5 3 Expand the nail 0 to the outside and hold the Scan Print Unit NAILG SCAN PRINT UNIT Fig 7 3 6 7 5 ...

Page 122: ...7 3 8 Fig 7 3 7 5 Disconnect the nine connectors on the MCNT PC board and also disconnect a connector on the Power Supply Unit Then the Scan Print Unit can be removed from the machine NCU PC BOARD MODEM PC BOARD POWERSUPPLY UNIT NT PC BOARD Fig 7 3 8 2 Reassembly procedure Reverse the each disassembly procedures 7 6 ...

Page 123: ...th a hand and lift up PC BOARD NAIL FLAT CABLE NAIL a MCNT PC BOARD Fig 7 3 9 b Disconnect a fiat cable 0 and also disconnect other two flat cables on the MCNT c The board can be removed from the machine NCU PC board a Push the nail 8 and other one to this side and disconnect the flat cable b The board can be removed from the machine 2 Reassembly procedure Reverse the each disassembly procedures 7...

Page 124: ...re I Open theTop Cover Sub item 7 3 l 2 Remove the 15 screws 0 Fig 7 3 10 3 Disconnect the two flat cablesoon the OPE PC board Then the board can be removed from the Top Cover 2 Reassembly procedure Reversethe each disassembly procedures 7 B ...

Page 125: ...connector on the MCNT PC board MCNT PC BOARD CONNECT 0 POWERSUPPLY UNIT Fig 7 3 1 1 3 Expand the nails to this side by using a minus screw driver and then the unit can be removed from the machine as figure below POWERSUPPLY UNIT Fig 7 3 12 2 Reassembly Procedure Reverse the each disassembly procedures 7 9 ...

Page 126: ...t Exist Sensor Disassemble procedure PRINT SCAN 1 Disassemblethe Print Scan Unit Sub item 7 3 2 IMAGE SENSOR UN11 Fig 7 3 13 2 Hold the unit and remove a nail connection by using a minus screw driver IMAGESENSOR UNIT Fig 7 3 14 7 10 ...

Page 127: ...Fig 7 3 15 4 The unit can be remove from the Scan Print Unit Document exist sensor After removed the Image Sensor Unit the document exist sensor can be seen as figure below Fig 7 3 16 EXISI 2 Reassembly procedure Reverse the each disassembly procedures 7 11 ...

Page 128: ...er The holder can be removed from the Scan Print Unit SEPARATION RUBBER HOLDER SCAN PRINT UNIT FEED ROLLER Fig 7 3 17 Separation Rubber Holder Fig 7 3 18 Separation Rubber Holder sideview b Hold the positions by using a radio pliers and pull the fixer above figure Fig 7 3 19 Separation Rubber Holder rear side view c The rubber can be removed from the holder 7 1 2 ...

Page 129: ...level to 90 degrees upper direction LE Fig 7 3 20 ii Rotate also the other side s lever to 90 degrees upper direction EVER Fig 7 3 21 iii The roller can lift up 2 Reassembly procedure Reverse the each disassembly procedures 7 13 ...

Page 130: ...rocedure 1 Open the Top Cover Sub item 7 3 1 2 Expand the nail I of the print roller cover to the outside by using a minus screw driver and lift it up Fig 7 3 22 3 Expand also the other side nail of the cover to the outside by using the driver Fig 7 3 23 7 1 4 ...

Page 131: ...CTOR Fig 7 3 24 4 Rotate the lever of the Print Roller to 90 degrees upper direction and also rotate the other side s lever RECORDING PAPER DETECTOR PRINT ROLLER COVER SCAN PRINT UNIT LEVER Fig 7 3 25 5 The roller can be removed from the unit 2 Reassembly procedure Reverse the each disassembly procedures 7 1 5 ...

Page 132: ...nit Sub item 7 3 2 2 Disconnect a connector on the T Head Ass y Fig 7 3 26 3 Remove the Paper Release Lever green color to the foreground 4 Pull up the T Head Ass y to the foreground by using a radio pliers THERMAL HEAD HEAD HOLDER SPRING PLATE Fig 7 3 27 Thermal Head Ass y 7 16 ...

Page 133: ...I 2 Reassembly procedure Reverse the each disassembly procedures Note HEAD HOLDER FRAME Notice that the fulcrum position should be connected afterthe reassembled MA M J HEAD HOLDER Fig 7 3 28 7 1 7 ...

Page 134: ...BRIEF TECHNICAL DESCRIPTION ...

Page 135: ... R 8 BRIEF TECHNICAL DESCRIPTION 8 1 PC B d and Unit 8 1 8 1 1 PC Boards 8 l 8 1 2 Unit 8 l 8 1 3 Overall Circuit Diagram 8 1 8 1 4 General Block Diagram 8 l 8 2 Signal Flow _______________ ____________ _____ 8 4 ...

Page 136: ...oard NCU 16C 3 Operation Control PC Board OPE 16 Unit 1 Power Supply Unit PWU 16C Other electro magnetically driven parts optical and print system and etc are SO called Scan Print Unit Overall Circuit Diagram Figure 8 1 1 is the overall circuit diagram of the OKIFAX OF 7 facsimile transceiver General Block Diagram Figure 8 1 2 is the general block diagram of the OKIFAX OF 7 facsimile transceiver 8...

Page 137: ...Fig 8 1 1 Overall circuitdiagraam OKIFAX OF 7 8 2 ...

Page 138: ... I I Ii II _ _ r 8 3 ...

Page 139: ...lainsthe signal flows such as G3 data sending and receiving etc 1 Copy Mode Data Signal Flow 2 G3 Data Send Receive Signal Flow 3 300 bps Protocol Signal Flow All of the above signal flows are shown in Figure 8 2 1 to Figure 8 2 3 8 4 ...

Page 140: ... _ _ 111 OPEPPINEL I I LCD 1 ...

Page 141: ... T I I e _ r 8 6 ...

Page 142: ...DETECTER __ I m ...

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