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Panasonic KX-FP85, Service Manual

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Panasonic KX-FP85 Service Manual Download Page 165

6.6.2. MODEM CIRCUIT OPERATION

The modem (IC505) has all the hardware satisfying the CCITT standards mentioned previously.

When the ASIC IC501 (77) is brought to a low level, the modem (IC505) is chip-selected and the resistors inside IC are selected
by the select signals from ASIC (IC501) ADR0-ADR4. The commands are written through the data bus, and all the processing is
controlled by the ASIC (IC501) according to CCITT procedures. The INT signal dispatched from IRQ1, 2 (pins 108 and 121 of
IC505) to ASIC (IC501) when the transmission data is accepted and the received data is demodulated, the ASIC (IC501)
implements post processing. This modem (IC505) has an automatic application equalizer.

With training signal 1 or 2 during G3 reception, it can automatically establish the optimum equalizer. The modem (IC505) operates
using the 32.256 MHz clock (X503).

 1. Facsimile Transmission

The digital image data on the data bus is modulated in the modem (IC505), and sent from pin 69 via amplifier IC101 and the
NCU section to the telephone line.

Refer to 2.3.7.1 CHECK SHEET(P.76).

 2. Facsimile Reception

The analog image data which is received from the telephone line passes through the NCU section and enters pin 60 of the
modem (IC505). The signals that enter pin 60 of the modem (IC505) are demodulated in the board to digital image signals, then
placed on the data bus.

In this case, the image signals from the telephone line are transmitted serially. Hence, they are placed on the bus in 8 bit units.
Here, the internal equalizer circuit reduces the image signals to a long-distance receiving level.

This is designed to correct the characteristics of the frequency band centered about 3 kHz and maintain a constant receiving
sensitivity. It can be set in the service mode.

Refer to 2.3.7.1 CHECK SHEET(P.76).

 3. DTMF Transmission (Monitor tone)

The DTMF signal generated in the modem (IC505) is output from pin 69, and is then sent to the circuit on the same route as
used for facsimile transmission.

Refer to 2.3.7.1 CHECK SHEET(P.76).

(DTMF Monitor Tone)

Refer to 2.3.7.1 CHECK SHEET(P.76).

 4. Call Tone Transmission

This is the call signal which is generated in the ASIC (IC501) and sent to the speaker.

Refer to 2.3.7.1 CHECK SHEET(P.76).

 5. Busy/Dial Tone Detection

The path is the same as FAX receiving. When it is detected, the carrier detect bit of the resistor in the modem (IC505) becomes
1, and this status is monitored by the ASIC (IC501).

165

KX-FP85

Summary of Contents for KX-FP85

Page 1: ... 2000 Kyushu Matsushita Electric Co Ltd All rights reserved Unauthorized copying and distribution is a violation of law KX FP85 for U S A Compact Plain Paper FAX ORDER NO KMF0004400C1 F7 ...

Page 2: ...MOVAL PROCEDURE 125 5 3 FLAT PACKAGE IC INSTALLATION PROCEDURE 126 5 4 BRIDGE MODIFICATION PROCEDURE 126 6 CIRCUIT OPERATIONS 127 6 1 CONNECTION DIAGRAM 127 6 2 GENERAL BLOCK DIAGRAM 128 6 3 CONTROL SECTION 130 6 4 FACSIMILE SECTION 140 6 5 SENSORS AND SWITCHES 155 6 6 MODEM SECTION 159 6 7 DESCRIPTION OF BLOCK DIAGRAM IN ANALOG SECTION 166 6 8 NCU SECTION 168 6 9 ITS Integrated telephone System a...

Page 3: ...OR SERVICE TECHNICIANS ICs and LSIs are vulnerable to static electricity When repairing the following precautions will help prevent recurring malfunctions 1 Cover the plastic part s boxes with aluminum foil 2 Ground the soldering irons 3 Use a conductive mat on the worktable 4 Do not touch the IC or LSI pins with bare fingers 1 4 BATTERY CAUTION CAUTION Danger of explosion if the battery is replac...

Page 4: ...2 times 1 6 PERSONAL SAFETY PRECAUTIONS 1 6 1 MOVING SECTIONS OF THE UNIT Be careful not to let your hair clothes fingers accessories etc become caught in any moving sections of the unit The moving sections of the unit are the rollers and a gear There is a separation roller and a document feed roller which are rotated by the document feed motor A gear rotates the two rollers Be careful not to touc...

Page 5: ...ays unplug the AC power cord before disassembling for service 1 7 SERVICE PRECAUTIONS 1 7 1 PRECAUTIONS TO PREVENT DAMAGE FROM STATIC ELECTRICITY Electrical charges accumulate on a person For instance clothes rubbing together can damage electric elements or change their electrical characteristics In order to prevent static electricity touch a metallic part that is grounded to release the static el...

Page 6: ...ple quick and secure Plain Paper Facsimile Machine 15 second transmission speed Letter Legal G3 compatible Automatic document feeder 10 sheets Fax pager call Quick scan Resolution Standard Fine Super fine Half tone 64 level Broad cast with Jog Dial 50 sheet paper capacity 20 lb Automatic fax phone switching Distinctive ring detection The 15 second speed is based upon the ITU T No 1 Test Chart on t...

Page 7: ...W Transmission Approx 16 W Reception Approx 42 W When receiving a 20 black document Copy Approx 42 W When copying a 20 black document Maximum Approx 135 W When copying a 100 black document Power Supply 120 V AC 60 Hz Memory Capacity Voice memory Approx 18 minutes of recording time including greeting messages Fax memory Approx 28 pages memory reception Approx 25 pages memory transmission Based on I...

Page 8: ...1 11 TEST CHART 1 11 1 ITU T No 1 TEST CHART 8 KX FP85 ...

Page 9: ...1 11 2 ITU T No 2 TEST CHART 9 KX FP85 ...

Page 10: ...ATION OF CONTROLS 1 12 1 OVERVIEW Note The document will be ejected from the front of the unit Install the unit on a desk or floor with a smooth surface and do not place anything in front of the unit 10 KX FP85 ...

Page 11: ...1 12 2 CONTROL PANEL 11 KX FP85 ...

Page 12: ...or additional equipment protection we recommend the use of a surge protector The following types are available TELESPIKE BLOK MODEL TSB TRIPPE MFG CO SPIKE BLOK MODEL SK6 0 TRIPPE MFG CO SUPER MAX PANAMAX or MP1 ITW LINX The warranty does not cover damage due to power line surges or lightning When you operate this product the power outlet should be near the product and easily accessible 12 KX FP85...

Page 13: ... to 35 C Relative humidity 20 to 80 without condensation Power cord length should be less than 5 meters 16 4 feet Using a longer cord may reduce the voltage or cause malfunctions Avoid direct sunlight Do not install near devices which contain magnets or generate magnetic fields Do not subject the unit to strong physical shock or vibration Keep the unit clean Dust accumulation can prevent the unit ...

Page 14: ...ot on the back of the unit and then insert the other tab into the other slot Note Do not place the unit in areas where the paper tray may be obstructed by a wall etc To use legal size paper Please purchase a legal paper tray Model No KX FA50 and install as shown above 14 KX FP85 ...

Page 15: ... over the tab If the paper is not inserted correctly readjust the paper or the paper may jam Note for recording paper Avoid paper with a cotton and or fiber content that is over 20 such as letterhead paper or paper used for resumes Do not use different types or thicknesses of paper at the same time This may cause a paper jam Avoid extremely smooth or shiny paper that is highly textured Avoid paper...

Page 16: ... FEED Note Remove chips staples or other similar fastening objects Check that ink paste or correction fluid has dried Do not send the following types of documents Use copies for fax transmission Chemically treated paper such as carbon or carbon less duplicating paper Electrostatically charged paper Heavily curled creased or torn paper Paper with a coated surface Paper with a faint image Paper with...

Page 17: ...he next space and press six times 5 Press 6 Press Note You can enter your logo by rotating To correct a mistake Press or to move the cursor to the incorrect character then make the correction To insert a character 1 Press or to move the cursor to the position to the right of where you want to insert the character 2 Press Insert to insert a space and enter the character To delete a character Move t...

Page 18: ...ead of pressing the dial keys you can select characters using the JOG DIAL 1 Rotate until the desired character is displayed 2 Press to move the cursor to the next space The character displayed in step 1 is inserted 3 Return to step 1 to enter the next character Display order of characters 18 KX FP85 ...

Page 19: ...or replacement Each roll prints about 150 letter size pages Refer to 1 10 OPTIONAL ACCESSORIES P 7 Model No KX FA53 Replacement film 1 roll Model No KX FA55 Replacement film 2 rolls 1 Open the front cover by pulling up the center part 2 Push the back cover open button and open the back cover 3 Pull up the blue gear side and remove the used ink film Remove the used core 19 KX FP85 ...

Page 20: ...t Insert the back ink film roll 6 If the ink film is slack tighten it by winding the gear 7 Close the back cover securely by pushing down on the dotted area at both ends Close the front cover securely The following message will be displayed while the unit is checking that there is no slack on the ink film Display Note The ink film is completely safe to touch and will not rub off on your hands like...

Page 21: ...ing and communication testing to determine if the problem originates from the transmitter receiver or the telephone line 4 Determine causes Determine the causes of the equipment problem by troubleshooting 5 Equipment repairs Repair or replace the defective parts and take appropriate measures at this stage to ensure that the problem will not recur 6 Confirm normal operation of the equipment After c...

Page 22: ...1 15 2 MAINTENANCE CHECK ITEMS COMPONENT LOCATIONS 22 KX FP85 ...

Page 23: ... P 114 6 Glass If the glass is dirty clean them with a dry soft cloth Refer to 1 15 3 MAINTENANCE P 24 7 Abnormal wear and tear or loose parts Replace the part Check if the screws are tight on all parts 1 15 2 2 MAINTENANCE CYCLE No Item Cleaning Cycle Replacement Cycle Procedure 1 Separation Roller Ref No 117 3 months 7 years 100 000 documents Refer to 4 6 HOW TO REMOVE THE SEPARATION ROLLER P 11...

Page 24: ...o clean the inside of the unit 1 15 3 2 CLEANING THE THERMAL HEAD AND BLACK BAR If dirty patterns or black or white bands appear on a copied or received document clean the thermal head 1 Disconnect the power cord and the telephone line cord 2 Open the front cover by pulling up the center part 3 Open the back cover by pushing the back cover open button 4 Clean the thermal head with a cloth moistene...

Page 25: ...d cables are connected correctly not loose If the problem occurs randomly check it very carefully 3 When connecting the AC power cord with the unit and checking the operation exercise utmost care when handling electric parts in order to avoid electric shocks and short circuits 4 After troubleshooting double check that you have not forgotten any connectors left any loose screws etc 5 Always test to...

Page 26: ...or more of the following messages will appear on the display 2 2 USER RECOVERABLE ERRORS Note The explanations given in the are for servicemen only CROSS REFERENCE 1 8 FEATURES P 6 2 2 1 DOCUMENT JAMS P 28 3 ADJUSTMENTS P 110 26 KX FP85 ...

Page 27: ...CROSS REFERENCE 1 2 2 1 DOCUMENT JAMS P 28 2 2 2 RECORDING PAPER JAMS P 29 Note The explanations given in the are for servicemen only 27 KX FP85 ...

Page 28: ...uring feeding remove the jammed document as follows 1 Open the front cover by pulling up the center part 2 Remove the jammed document carefully 3 Close the front cover securely Note Do not pull out the jammed paper forcibly before opening the front cover 28 KX FP85 ...

Page 29: ...ng paper has jammed and the display will show the following massage When paper has jammed under the film cartridge Display Remove the jammed paper as follows 1 Open the front cover by pulling up the center part 2 Push the back cover open button and open the back cover 3 Remove the jammed recording paper 29 KX FP85 ...

Page 30: ... 4 If the ink film is slack tighten it by winding the gears 5 Close the back cover securely by pushing down on the dotted area at both ends Close the front cover securely 30 KX FP85 ...

Page 31: ...nt expressions for the same problem as they are not a technician or engineer Using your experience test the problem area corresponding to the claim Also returns from a customer or dealer often have a claim tag For these cases as well you need to determine the problem Test the unit using the simple check list on 2 3 3 1 SIMPLE CHECK LIST P 33 Difficult problems may be hard to determine so repeated ...

Page 32: ...HOOTING ITEMS TABLE CROSS REFERENCE 2 3 4 ADF Auto Document Feed SECTION P 34 2 3 5 COMMUNICATION SECTION P 47 2 3 7 ANALOG BOARD SECTION P 76 2 3 10 OPERATION PANEL SECTION P 84 2 3 11 SENSOR SECTION P 85 32 KX FP85 ...

Page 33: ...2 3 3 1 SIMPLE CHECK LIST CROSS REFERENCE 2 5 TEST FUNCTIONS P 103 33 KX FP85 ...

Page 34: ... 2 3 9 POWER SUPPLY BOARD SECTION P 81 2 3 11 SENSOR SECTION P 85 2 5 TEST FUNCTIONS P 103 3 ADJUSTMENTS P 110 4 DISASSEMBLY INSTRUCTIONS P 111 6 4 5 STEPPING MOTOR DRIVE CIRCUIT P 145 Note When using thin paper etc sometimes the document will not feed Refer to 3 1 ADJUSTING THE FEEDER PRESSURE P 110 34 KX FP85 ...

Page 35: ...2 3 4 2 DOCUMENT JAM CROSS REFERENCE 2 3 11 SENSOR SECTION P 85 4 DISASSEMBLY INSTRUCTIONS P 111 35 KX FP85 ...

Page 36: ...efer to 3 1 ADJUSTING THE FEEDER PRESSURE P 110 Fig B CROSS REFERENCE 1 15 3 MAINTENANCE P 24 3 ADJUSTMENTS P 110 4 DISASSEMBLY INSTRUCTIONS P 111 Note When confirming if the characters are extended or distorted or if the feed problem is occurred use this test chart format Fig B 36 KX FP85 ...

Page 37: ...he Fig B document in 2 3 4 3 MULTIPLE FEED P 36 and using it CROSS REFERENCE 1 15 2 MAINTENANCE CHECK ITEMS COMPONENT LOCATIONS P 22 2 3 4 ADF Auto Document Feed SECTION P 34 2 3 4 3 MULTIPLE FEED P 36 4 DISASSEMBLY INSTRUCTIONS P 111 37 KX FP85 ...

Page 38: ...3 4 3 MULTIPLE FEED P 36 and using it CROSS REFERENCE 1 14 3 INSTALLING THE RECORDING PAPER P 15 2 3 6 DIGITAL BOARD SECTION P 66 2 3 9 POWER SUPPLY BOARD SECTION P 81 2 3 11 SENSOR SECTION P 85 2 5 TEST FUNCTIONS P 103 4 DISASSEMBLY INSTRUCTIONS P 111 9 1 OPERATION PANEL SECTION P 180 38 KX FP85 ...

Page 39: ...2 3 4 6 PAPER JAM CROSS REFERENCE 2 3 11 SENSOR SECTION P 85 2 5 TEST FUNCTIONS P 103 4 DISASSEMBLY INSTRUCTIONS P 111 6 5 SENSORS AND SWITCHES P 155 39 KX FP85 ...

Page 40: ... DATA IS SKEWED We recommend making a copy of the Fig B document in 2 3 4 3 MULTIPLE FEED P 36 and using it CROSS REFERENCE 2 3 4 4 SKEW P 37 2 3 4 9 THE RECEIVED FAX DATA IS SKEWED We recommend making a copy of the Fig B document in 2 3 4 3 MULTIPLE FEED P 36 and using it CROSS REFERENCE 2 3 4 7 MULTIPLE FEED AND SKEW P 40 40 KX FP85 ...

Page 41: ...2 3 4 10 RECEIVED OR COPIED DATA IS EXPANDED We recommend making a copy of the Fig B document in 2 3 4 3 MULTIPLE FEED P 36 and using it CROSS REFERENCE 4 DISASSEMBLY INSTRUCTIONS P 111 41 KX FP85 ...

Page 42: ...ng a copy of the Fig B document in 2 3 4 3 MULTIPLE FEED P 36 and using it CROSS REFERENCE 2 3 4 3 MULTIPLE FEED P 36 2 3 4 12 A BLANK PAGE IS RECEIVED P 44 2 5 TEST FUNCTIONS P 103 4 DISASSEMBLY INSTRUCTIONS P 111 6 4 3 THERMAL HEAD P 142 42 KX FP85 ...

Page 43: ...Fig C 43 KX FP85 ...

Page 44: ...SECTION P 76 2 5 TEST FUNCTIONS P 103 2 3 4 13 BLACK OR WHITE VERTICAL LINE We recommend making a copy of the Fig B document in 2 3 4 3 MULTIPLE FEED P 36 and using it CROSS REFERENCE 1 15 3 2 CLEANING THE THERMAL HEAD AND BLACK BAR P 24 2 3 4 3 MULTIPLE FEED P 36 4 DISASSEMBLY INSTRUCTIONS P 111 44 KX FP85 ...

Page 45: ...d making a copy of the Fig B document in 2 3 4 3 MULTIPLE FEED P 36 and using it CROSS REFERENCE 2 3 4 3 MULTIPLE FEED P 36 2 3 4 11 A BLANK PAGE IS COPIED P 42 2 3 6 DIGITAL BOARD SECTION P 66 2 5 TEST FUNCTIONS P 103 4 DISASSEMBLY INSTRUCTIONS P 111 45 KX FP85 ...

Page 46: ...D We recommend making a copy of the Fig B document in 2 3 4 3 MULTIPLE FEED P 36 and using it CROSS REFERENCE 2 3 4 3 MULTIPLE FEED P 36 2 3 7 ANALOG BOARD SECTION P 76 2 5 TEST FUNCTIONS P 103 4 DISASSEMBLY INSTRUCTIONS P 111 46 KX FP85 ...

Page 47: ...ut sometimes fails The unit can copy documents Troubleshooting Problem with the service line or with the transmitter s fax 4 The fax completely fails to transmit or receive The unit can copy documents Troubleshooting Problem with the electric circuit 5 The fax fails either to transmit or receive when making a long distance or an international call The unit can copy documents Detailed description o...

Page 48: ...2 3 5 1 DEFECTIVE FACSIMILE SECTION 2 3 5 1 1 TRANSMIT PROBLEM CROSS REFERENCE 1 15 3 MAINTENANCE P 24 2 3 4 ADF Auto Document Feed SECTION P 34 2 3 10 OPERATION PANEL SECTION P 84 48 KX FP85 ...

Page 49: ...2 3 5 1 2 SOMETIME THERE IS A TRANSMIT PROBLEM Note 596 Transmit level set represents a service code Refer to 2 4 4 SERVICE FUNCTION TABLE P 91 49 KX FP85 ...

Page 50: ...PAPER when the fax switches to the memory receiving mode and the memory capacity becomes full of the unprintable data In this case error messages MEMORY FULL and its main cause for example CHECK PAPER are displayed on the LCD Once you solve the main problem MEMORY FULL will be cancelled and the reception problem will be resolved LCD display messages indicating the error causes are shown below CHEC...

Page 51: ...o causes can be considered for this symptom Cause 1 The other party is executing automatic dialing the call has been received by this unit and the CED or DIS signal response time is too long In most cases this unit detects the CNG signal and can respond to CED or DIS According to the ITU T standard the communication procedure is cancelled when there is no response from the other party within 35 se...

Page 52: ... procedure at the time of transmission from FAX1 to FAX2 there is a delay until the echo canceler operates S1 is closed so that a part of the head of the training signal may drop out Normal reception by FAX2 may not be possible and transmission may not be started Countermeasure A When the international line mode is ON in the service mode code No 521 a dummy signal is attached to the head of the tr...

Page 53: ... Long distance and international communication operations SYMPTOM COUNTERMEASURE Does not receive in the automatic mode 1 If possible manual transmission should be done from the transmission side 2 If possible two pauses should be inserted at the end of the auto dial number on the transmission side 3 If possible the Function Selector Switch should be switched to FAX Does not transmit 1 Confirm the...

Page 54: ...R RCV PIN is transmitted 8 52 NO RESPONSE RCV Reception is finished when the T1 TIMER expires 9 54 ERROR NOT YOUR UNIT RCV DCN is received after DIS transmission 11 58 COMMUNICATION ERROR RCV DCN is received after FTT transmission 13 59 ERROR NOT YOUR UNIT SND DCN responds to the post message 14 65 COMMUNICATION ERROR SND DCN is received before DIS reception 2 65 COMMUNICATION ERROR RCV Reception ...

Page 55: ...55 KX FP85 ...

Page 56: ...CROSS REFERENCE 2 5 TEST FUNCTIONS P 103 56 KX FP85 ...

Page 57: ...CROSS REFERENCE 2 5 TEST FUNCTIONS P 103 57 KX FP85 ...

Page 58: ...CROSS REFERENCE 2 5 TEST FUNCTIONS P 103 58 KX FP85 ...

Page 59: ...CROSS REFERENCE 2 5 TEST FUNCTIONS P 103 59 KX FP85 ...

Page 60: ...60 KX FP85 ...

Page 61: ...61 KX FP85 ...

Page 62: ...CROSS REFERENCE 2 5 TEST FUNCTIONS P 103 62 KX FP85 ...

Page 63: ...Based on this the parameters for the desired codes can be changed The procedure for changing and listing parameters is described on 2 3 5 2 1 ENTERING THE REMOTE PROGRAMMING MODE AND CHANGING SERVICE CODES P 63 Also before exiting the remote programming mode it is advisable to obtain a new list to confirm that the changes were made correctly Hint Since the connected telephone is in use during the ...

Page 64: ...K 070 Pager transfer ON OFF OFF NG 075 IQ FAX 1 ON 2 OFF OFF OK 076 FAX tone 1 ON 2 OFF ON OK 077 Auto answer mode 1 TAD FAX 2 FAX Only 3 TEL FAX TAD FAX OK 078 TEL FAX ring 1 to 4 rings 2 OK 080 Set default YES NO NO NG 501 Pause time set 001 600 x 100msec 050 OK 502 Flash time set 01 99 x 10msec 70 OK 503 Dial speed 1 10pps 2 20 pps 10pps OK 510 Vox time 1 6sec 2 4sec 6sec OK 511 Vox sense 1 Hig...

Page 65: ... film feed 1 ON 2 OFF ON OK 763 CNG detect time for friendly reception 1 10s 2 20s 3 30s 30s OK 771 T1 timer 1 35s 2 60s 35s OK 774 T4 timer 00 99 x 100ms 00 OK 775 Monitoring of message transfer 1 ON 2 OFF OFF OK 784 Voice prompt 1 Start NG 815 Sensor VOX test NG 841 Digital SP Phone RX TX check 1 SP Phone NG 852 Print test pattern NG 853 Top margin 1 9 OK 854 Left margin 1 8 OK 880 History list ...

Page 66: ...lied and any malfunctions are analyzed In past experiences digital IC especially SRAM DRAM and ROM malfunctions are extremely rare after installation in the product This may be repaired by replacing the IC DRAM etc However the real cause may not have been an IC malfunction but a soldering fault instead Soldering faults difficult to detect with the naked eye are common particularly for ASIC and RA ...

Page 67: ...p the system Those signal lines should remain normal Other signal lines are not directly related to that failure even if they have faults or troubles As long as these signals remain normal once the power is turned on each IC can repeatedly output 5V H and 0V L The following shows NG and normal wave patterns 67 KX FP85 ...

Page 68: ...NG Wave pattern Refer to NG EXAMPLE 68 KX FP85 ...

Page 69: ...elayed the circuit will not work Nor will it if the IC is defective and the output voltage level is not normal although the timing of these signals is accurate enough to meet the specifications Make sure that your oscilloscope is calibrated before starting a test Therefore it is imperative to confirm whether each IC outputs the signal at the correct level See the I O Pin No Diagram The signal leve...

Page 70: ...I O and Pin No Diagram 70 KX FP85 ...

Page 71: ... SRAM and modem are checked If initialization fails for the ICs the system will not boot up In this case please find the cause as follows CROSS REFERENCE 2 3 6 3 NG EXAMPLE P 74 2 3 6 4 CHECK THE STATUS OF THE DIGITAL BOARD P 75 2 3 9 POWER SUPPLY BOARD SECTION P 81 71 KX FP85 ...

Page 72: ...CROSS REFERENCE 2 3 6 4 CHECK THE STATUS OF THE DIGITAL BOARD P 75 Other NG example while the power is ON and the LCD displays the following 72 KX FP85 ...

Page 73: ... find an IC512 malfunction and replace it with a new one You have to pre record the voice message by using a special ROM How to Use the Special ROM Voice Message Recording ROM 1 Turn the AC power OFF 2 Replace the regular system ROM with the special ROM 3 Turn the AC power ON 4 The Voice Message Recording starts automatically 5 Turn the AC power OFF 6 Replace the special ROM with the regular syste...

Page 74: ...2 3 6 3 NG EXAMPLE 74 KX FP85 ...

Page 75: ...2 3 6 4 CHECK THE STATUS OF THE DIGITAL BOARD 75 KX FP85 ...

Page 76: ...put to the telephone line The signal mainly flowing on this route is analog You can trace the signal with an oscilloscope The signal flow on each route is shown in the Check Sheet here If you find a specific problem in the unit for example if you cannot communicate with the H S trace that signal route locally with the following Check Sheet and locate the faulty point 2 3 7 1 CHECK SHEET Note Insid...

Page 77: ...en the handset microphone and telephone line sending or between the telephone line and the handset speaker receiving or between the microphone and the telephone line sending or between the telephone line and the speaker receiving Check the components at that point 2 3 7 1 CHECK SHEET P 76 is useful for this investigation 2 No pulse dialing 3 No ring tone or No bell CROSS REFERENCE 2 3 7 1 CHECK SH...

Page 78: ...4 No tone dialing CROSS REFERENCE 2 3 7 1 CHECK SHEET P 76 78 KX FP85 ...

Page 79: ...leshooting procedures between the two types At the start of communication during the initial 2 3 correspondences the digital speakerphone performs half duplex operation alternating between transmission Tx and reception Rx Then duplex communication becomes available Learning occurs during the initial 2 3 correspondences in order to set the appropriate parameters for duplex communication You cannot ...

Page 80: ...CROSS REFERENCE 2 3 7 ANALOG BOARD SECTION P 76 80 KX FP85 ...

Page 81: ... test withstanding voltage test intentional short circuit test etc Caution If you find a melted fuse in the unit do not turn on the power until you locate and repair the faulty parts except for the fuse otherwise the fuse will melt again and you cannot pinpoint the faulty point In most cases the symptom is that nothing is output It is more likely that the fault is in the primary side rather than t...

Page 82: ...2 3 9 2 TOROUBLESHOOTING FLOW CHART 82 KX FP85 ...

Page 83: ...orst case of Q101 is a short circuit between the Drain and Gate because damage expands to the peripheral circuit of Q101 This is due to a very high voltage through the Gate circuit which is composed of R128 R109 D106 and IC101 You should change all of the parts listed as follows F101 Q101 R128 R109 D106 IC101 D201 If D201 is broken the oscillation circuit in the power supply cannot operate Check i...

Page 84: ...2 3 10 OPERATION PANEL SECTION 2 3 10 1 NO KEY OPERATION CROSS REFERENCE 2 5 TEST FUNCTIONS P 103 2 3 10 2 NO LCD INDICATION CROSS REFERENCE 2 5 TEST FUNCTIONS P 103 84 KX FP85 ...

Page 85: ...ensor recording paper sensor and jam sensor are turned ON OFF by the copy operation Therefore each sensor can be checked for proper mechanical operation As for the electric check check whether each voltage is right or not with following flowchart turning each sensor lever ON OFF manually 2 3 11 1 CHECK THE DOCUMENT TOP SW SW353 REMOVE DOCUMENT 2 3 11 2 CHECK THE DOCUMENT SET SW SW352 CHECK DOCUMEN...

Page 86: ...2 3 11 5 CHECK THE PAPER TOP SENSER PS501 PAPER JAMMED 2 3 12 CIS Contact Image Sensor SECTION Refer to 6 4 4 SCANNING BLOCK P 144 CROSS REFERENCE 2 5 TEST FUNCTIONS P 103 86 KX FP85 ...

Page 87: ...87 KX FP85 ...

Page 88: ...2 3 13 THERMAL HEAD SECTION Refer to 6 4 3 THERMAL HEAD P 142 88 KX FP85 ...

Page 89: ...o the user In both the User and Service Modes there are Set Functions and Test Functions This facilitates communication between the user and the service man while programming the unit The Set Functions are used to program various features and functions and the Test Functions are used to test the various functions The Set Functions are accessed by entering their code changing the appropriate value ...

Page 90: ...2 4 3 USER MODE The list below is an example of the SYSTEM SETUP LIST the unit prints out Note The above values are the default values 90 KX FP85 ...

Page 91: ...ial 550 Memory clear To reset the value to the default one except the top margin 853 and left margin 854 START input 551 ROM check See 2 5 TEST FUNCTIONS P 103 552 DTMF single tone test 1 ON 2 OFF 1 2 2 See 2 5 TEST FUNCTIONS P 103 553 Monitor on FAX communication select 1 OFF 2 PHASE B 3 ALL 1 3 1 Sets whether to monitor the line signal with the unit s speaker during FAX communication or not 554 ...

Page 92: ...the speed to start training during FAX transmission Refer to 2 3 5 1 2 SOMETIME THERE IS A TRANSMIT PROBLEM P 49 and 2 3 5 1 6 THE UNIT CAN COPY BUT THE TRANSMISSION AND RECEPTION IMAGE ARE INCORRECT P 53 718 Receive speed selection 1 9600BPS 2 7200BPS 3 4800BPS 4 2400BPS 1 4 1 Adjusts the speed to start training during FAX reception Refer to 2 3 5 1 3 RECEIVE PROBLEM P 50 and 2 3 5 1 6 THE UNIT C...

Page 93: ...rnal 3 list See 2 4 7 3 PRINTOUT EXAMPLE P 101 890 TEL FAX 1st ring back tone 1 ON 2 OFF 1 2 1 Selects whether the TEL FAX 1st ring back tone is ON or OFF in the TEL FAX mode 895 TEL FAX mode receiving mode setting after bell time out 1 TAD 2 FAX 1 2 2 FAX or TAD can be performed in a Tel Fax mode after the bell time you set ran out 2 4 5 SERVICE MODE SETTINGS Example of a printed out list 93 KX F...

Page 94: ...2 4 6 HISTORY Note See the following descriptions of this report Item No 1 47 are corresponding to the listed items in 2 4 6 1 DESCRIPTIONS OF THE HISTORY REPORT P 95 94 KX FP85 ...

Page 95: ...0 TIME The shows the very first month date year and time set by the user after they purchased the unit 11 USAGE TIME The amount of time the unit has been powered ON 12 FACTORY NOW This shows how many days from factory production until the user prints out this history list 13 TEL MODE The amount of time the TEL mode setting was used 14 FAX MODE The amount of time the FAX mode setting was used 15 TE...

Page 96: ... be received between the fax and PC INCOMPLETE will be printed The number of pages transmitted If the unit does not have a PC interface NONE will be printed 34 NO OF IQ FAX LOADING OK 35 NO OF IQ FAX LOADING NG You may not be able to use IQ FAX if the special subscriber information is not loaded from the IQ FAX center before use Depending on the conditions of the communication line it may not be c...

Page 97: ... 47 NUMBER OF IQ FAX PAGES TRANSMITTED 97 KX FP85 ...

Page 98: ... PROGRAMMING P 63 The JOURNAL report only gives you basic information about a communication but the other two journal reports provide different information on the same item communication Example 2 4 7 SPECIAL SERVICE JOURNAL REPORTS 1 Look at NO 01 in the JOURNAL If you want to know about the details about that item see NO 01 in the JOURNAL 2 and the JOURNAL 3 You can get the following information...

Page 99: ...sage by friendly signal detection 4 VOX Means the unit detected silence or no voice 5 RMT DTMF Means the unit detected DTMF Remote Fax activation code entered remotely 6 PAL DTMF Means the unit detected DTMF Remote Fax activation code entered by a parallel connected telephone 7 TURN ON Means the unit started to receive after 15 rings Remote Turn On Service Code 573 8 TIME OUT Means the unit starte...

Page 100: ...um Scan Line Time Used only at the factory 8 EQM EQM means Eye Quality Monitor Used only at the factory 9 ERROR LINE RX When an error occurs while receiving a fax this shows the number of error lines 10 MAKER CODE This shows a 2 digit code of the other party s fax machine brand 0E KX model 00 Unknown 79 UF model 19 Xerox model 100 KX FP85 ...

Page 101: ...2 4 7 3 PRINTOUT EXAMPLE 101 KX FP85 ...

Page 102: ...102 KX FP85 ...

Page 103: ... the unit s functions When complaints are received from customers they provide an effective tool for identifying the locations and causes of malfunctions CROSS REFERENCE 2 5 1 DTMF SINGLE TONE TRANSMIT SELECTION P 104 2 5 2 BUTTON CODE TABLE P 105 2 5 3 PRINT TEST PATTERN P 106 103 KX FP85 ...

Page 104: ...e various test modes CROSS REFERENCE 2 3 8 DIGITAL SPEAKERPHONE P 79 6 5 SENSORS AND SWITCHES P 155 2 5 1 DTMF SINGLE TONE TRANSMIT SELECTION Note After performing this check do not forget to turn the setting off otherwise dialing in DTMF signal will not work 104 KX FP85 ...

Page 105: ...2 5 2 BUTTON CODE TABLE Note These codes 00 01 are only for the data in the History Report 105 KX FP85 ...

Page 106: ...2 5 3 PRINT TEST PATTERN 1 Platen roller Reference pattern 106 KX FP85 ...

Page 107: ...2 Left margin Top margin Reference pattern 107 KX FP85 ...

Page 108: ...3 Thermal head 1 dot Reference pattern 108 KX FP85 ...

Page 109: ...4 Use this test pattern to confirm the torque limiter for Ink film and platen roller timing Reference pattern 109 KX FP85 ...

Page 110: ... feeder pressure by following the steps below 1 Open the front cover by pulling up the center part 2 Shift the position of the green lever by using an instrument with a pointed end such as a paper clip Left When documents multiple feed Center Standard position pre selected Right When documents do not feed 3 Close the front cover securely 110 KX FP85 ...

Page 111: ...4 DISASSEMBLY INSTRUCTIONS 4 1 HOW TO REMOVE THE BOTTOM FRAME 111 KX FP85 ...

Page 112: ...4 2 HOW TO REMOVE THE OPERATION PANEL BLOCK 112 KX FP85 ...

Page 113: ...4 3 HOW TO REMOVE THE OPERATION BOARD AND LCD 113 KX FP85 ...

Page 114: ...4 4 HOW TO REMOVE THE ANALOG DIGITAL AND POWER BOARDS AND AC INLET 114 KX FP85 ...

Page 115: ...4 5 HOW TO REMOVE THE MOTOR BLOCK 115 KX FP85 ...

Page 116: ...116 KX FP85 ...

Page 117: ...4 6 HOW TO REMOVE THE SEPARATION ROLLER 117 KX FP85 ...

Page 118: ...4 7 HOW TO REMOVE THE IMAGE SENSOR CIS 118 KX FP85 ...

Page 119: ...4 8 HOW TO REMOVE THE TERMAL HEAD 119 KX FP85 ...

Page 120: ...4 9 HOW TO REMOVE THE PLATEN ROLLER BACK COVER 120 KX FP85 ...

Page 121: ...4 10 HOW TO REMOVE THE PICKUP ROLLER 121 KX FP85 ...

Page 122: ...4 11 HOW TO REMOVE THE CASSETTE PLATE 122 KX FP85 ...

Page 123: ...4 12 HOW TO REMOVE THE DOCUMENT TRAY 123 KX FP85 ...

Page 124: ...4 13 INSTALLATION POSITION OF THE LEAD WIRES 124 KX FP85 ...

Page 125: ... the foil by overheating Flux HI115 Specific gravity 0 863 Original flux should be replaced daily 5 2 FLAT PACKAGE IC REMOVAL PROCEDURE 1 Put plenty of solder on the IC pins so that the pins can be completely covered Note If the IC pins are not soldered enough you may give pressure to the P C board when cutting the pins with a cutter 2 Make a few cuts into the joint between the IC and its pins fir...

Page 126: ...ing with the corresponding soldering foil 2 Apply flux to all pins of the FLAT PACKAGE IC 3 Solder the pins sliding the soldering iron in the direction of the arrow 5 4 BRIDGE MODIFICATION PROCEDURE 1 Lightly resolder the bridged portion 2 Remove the remaining solder along the pins using a soldering iron as shown in the figure below 126 KX FP85 ...

Page 127: ...6 CIRCUIT OPERATIONS 6 1 CONNECTION DIAGRAM 127 KX FP85 ...

Page 128: ...ng in the storage area 4 Dynamic RAM IC503 This memory is used mainly for the parameter working in the storage area 5 MODEM IC505 Performs the modulation and the demodulation for FAX communication 6 Read Section CIS image sensor to read transmitted documents 7 Motor Driver IC508 Drives the transmission motor and the reception motor 8 Thermal Head Contains heat emitting elements for dot matrix imag...

Page 129: ...6 2 1 GENERAL BLOCK DIAGRAM CROSS REFERENCE 6 7 1 ANALOG UNIT BLOCK DIAGRAM P 167 129 KX FP85 ...

Page 130: ...6 3 CONTROL SECTION 6 3 1 BLOCK DIAGRAM 130 KX FP85 ...

Page 131: ...6 3 2 MEMORY MAP 131 KX FP85 ...

Page 132: ...AM This memory is programmed into the ASIC and uses 8 KB for the image processing See Fig A 7 THERMAL HEAD I F Transmits the recorded data to the thermal head 8 MOTOR I F Controls the transmission motor which feeds the document Controls the receiving motor which feeds the recording paper 9 OPERATION PANEL I F Serial interface with Operation Panel 10 I O PORT I O Port Interface 11 ANALOG UNIT Elect...

Page 133: ... 9FFFH are for the bank areas 6 3 5 STATIC RAM IC504 This 32KB RAM carries a common area of 8KB and bank areas which each have 12KB The addresses from 0000H to EFFFH are for the common area and from A000H to CFFFH are for the bank area 6 3 6 DYNAMIC RAM IC503 The DRAM serves as CPU and receives memory The address is F200H F3FFH DRAM access window 1 and F600H F7FFH DRAM access window 2 133 KX FP85 ...

Page 134: ...POWER SOURCE GND 27 RVN I 5V INPUT PORT FILM END SENSOR SIGNAL 28 IRDATXD IOP O 5V CRESET 29 IRDARXD IOP80 I 5V INPUT PORT MDL SEL 30 TXD IOP O 5V OUTPUT PORT RESERVED 31 RXD IOP O 5V OUTPUT PORT RESERVED 32 XRTS IOP O 5V OUTPUT PORT RESERVED 33 XCTS IOP O 5V OUTPUT PORT RESERVED 34 XDSR IOP O 5V OUTPUT PORT RESERVED 35 DCD IOP O 5V OUTPUT PORT RESERVED 36 XDTR IOP O 5V OUTPUT PORT RESERVED 37 RI ...

Page 135: ...DATA BUS 2 96 DB4 I O 5V CPU DATA BUS 4 97 DB1 I O 5V CPU DATA BUS 1 98 DB5 I O 5V CPU DATA BUS 5 99 DB0 I O 5V CPU DATA BUS 0 100 DB6 I O 5V CPU DATA BUS 6 101 DB7 I O 5V CPU DATA BUS 7 102 VSS GND POWER SOURCE GND 103 VDD 5V 5V POWER SOURCE 5V 104 XROMCS I O 5V ROM IC502 CHIP SELECT 105 RD O 5V CPU RD 106 WR O 5V CPU WR 107 ADR0 O 5V CPU ADDRESS BUS 0 108 ADR1 O 5V CPU ADDRESS BUS 1 109 ADR2 O 5...

Page 136: ... IOP I 5V INPUT PORT P TOP 153 RM1 IOP I 5V INPUT PORT DCN 154 RM2 IOP I 5V INPUT PORT CPC 155 RM3 IOP O 5V OUTPUT PORT VOLIN SEL1 156 RXE IOP I 5V INPUT PORT NOT USED 157 TMO O 5V MOTOR A PHASE 158 VDD 5V 5V POWER SOURCE 5V 159 VSS GND POWER SOURCE GND 160 TM1 IOP O 5V MOTOR B PHASE 161 TM2 IOP O 5V MOTOR A PHASE 162 TM3 IOP O 5V MOTOR B PHASE 163 TXE IOP O 5V MOTOR ENABLE SIGNAL 164 KSTART O 5V ...

Page 137: ...stem is reset completely 2 When pin 132 and 133 of IC501 become low level they will prohibit the SRAM IC503 from changing data The SRAM IC504 will go into the backup mode when they are backed up by a lithium battery 3 The watch dog timer built in the ASIC IC501 is initialized by the CPU about every 1 5 ms When a watch dog error occurs pin 137 of the ASIC IC501 becomes low level The terminal of the...

Page 138: ...n the power switch is OFF and the voltage of 5V decreases the voltage detect IC IC507 outputs Low level and the IC501 outputs the reset signal Pin 28 of the SRAM becomes roughly the same voltage as the battery voltage At this point pin 20 CS of IC504 becomes high level causing the SRAM to go into the backup mode in which the power consumption is lower 3 RTC Inside IC501 Backup Circuit Operation Wh...

Page 139: ...ording to the voltage output time the thermal head s temperature is detected After the thermal head temperature is converted to voltage in B it is then changed to digital data in the A D converter inside IC501 The CPU decides the strobe width of the thermal head according to this value Therefore this circuit can keep the thermal head at an even temperature in order to stabilize the printing densit...

Page 140: ...are stored in RAM 4 The white black data stored as above via routes 6 and 8 is input to the P S converter The white black data converted to serial data in the P S converter is input to the Thermal Head via route 9 and is printed out on recording paper Note Standard Reads 3 58 times mm Fine Reads 7 7 times mm Super Fine Reads 15 4 times mm Transmission 1 Same processing as COPY items 1 3 2 The data...

Page 141: ...6 4 2 BLOCK DIAGRAM 141 KX FP85 ...

Page 142: ...egisters of the 27 ICs are connected in series and upon the shift of the 1728 dot increment the shift register becomes filled with data and a latch pulse is emitted to each IC from IC501 pin 151 THLAT With this latch pulse all the contents of the shift registers are latched to the latch registers Thereafter through the addition of strobes from the IC501 pins 142 143 only the dot location of black ...

Page 143: ...143 KX FP85 ...

Page 144: ...istor Q512 turns on This applies voltage to the LED array to light it The contact image sensor is driven by each of the FTG F1 signals output from IC501 and the original image illuminated by the LED array undergoes photoelectric conversion to output an analog image signal SIG The analog image signal is input to the system LSI on AIN1 pin 1 of IC501 and converted into 8 bit data by the A D converte...

Page 145: ...from gate array IC501 pins 157 160 162 causing driver IC506 pins 16 13 to drive the motor coil The motor coil is energized sequentially in 2 phase increments which causes a 1 step rotation A 1 step rotation feeds 0 13 mm of recording paper or document paper Stepping Motor Drive Mode Function Mode Phase Pattern Speed Copy Standard or Fine 1 2 432 pps t 1 432 Super Fine 1 2 216 pps t 1 216 Paper Fee...

Page 146: ...C IC501 becomes a low level and Q503 turns off Then Q501 also turns off and instead of 24 V 5 V is supplied through D501 so that the motor is held in place When the system is in the stand by mode all of the motor drive transistors turn off Consequently the motor current stops 146 KX FP85 ...

Page 147: ...hed rotates counterclockwise CCW Swing Gear C engages CAM Gear to rotate counterclockwise CCW This operation provide four mode options A Transmit mode B Paper Pickup mode C Receive mode and D Copy mode selected by the Sensor Switch The Sensor Switch Lever s position in the CAM Gear controlled by the software selects a specific mode You can see which mode is selected by confirming the Mode Marker s...

Page 148: ...rolling positions of Swing Gears A B and C determine which gears convey their drive power in each mode A Transmit mode See Fig A Swing Gear A engages Gear E and conveys its power to the Separation Roller Gear through Gear G and sets the Separation Roller for feeding documents Fig A Transmit mode 148 KX FP85 ...

Page 149: ...up Idler Gear The Gear drive as follows Swing Arm C engaging Gear H Platen Idler Gear Pick up Idler Gear Pickup roller Gear The Pickup Roller picks up and pre feeds a recording paper until the recording paper pushes up the Paper Top sensor lever Fig B Paper Pickup mode Note See Sensor Location in 6 5 SENSORS AND SWITCHES P 155 149 KX FP85 ...

Page 150: ... up mode Swing Gear B engages Gear C and conveys its power to the Platen Roller Gear and Ink Ribbon Drive Gear through Platen Drive Gear Then the Platen Roller feeds recording paper for printing the received data Fig C Receive mode 150 KX FP85 ...

Page 151: ...p mode go Next Swing Gear A and B engages Gear E and Gear C respectively and conveys these power to the Separation Roller Gear and the Platen Roller Gear Then the Separation Roller feeds documents and the Platen Roller feeds recording paper for printing copier data Fig D Copy mode 151 KX FP85 ...

Page 152: ...6 4 6 3 MECHANICAL MOVEMENTS IN THE MAIN OPERATIONS transmitting documents receiving faxes and copying 6 4 6 3 1 IDLE STATUS Note See Sensor Locations in 6 5 SENSORS AND SWITCHES P 155 152 KX FP85 ...

Page 153: ...6 4 6 3 2 TRANSMITTING DOCUMENTS CROSS REFERENCE 2 3 11 SENSOR SECTION P 85 6 4 6 3 3 RECEIVING FAX Note See Sensor Locations in 6 5 SENSORS AND SWITCHES P 155 153 KX FP85 ...

Page 154: ...6 4 6 3 4 COPYING Note See Sensor Locations in 6 5 SENSORS AND SWITCHES P 155 CROSS REFERENCE 2 3 11 SENSOR SECTION P 85 154 KX FP85 ...

Page 155: ...e Message Error Operation Panel SW352 Document set SW CHECK DOCUMENT SW353 Document top SW REMOVE DOCUMENT Digital PCB SW501 Film End Cover open CHECK COVER or CHECK FILM PS501 Paper Top PAPER JAMMED Analog P C B SW102 Motor Position SW101 Hook Note See 2 5 TEST FUNCTIONS P 103 815 Sensor Check Sensor Locations 155 KX FP85 ...

Page 156: ...vel Operation Board Photo transistor Signal IC301 16 pin Out of the Read Position OFF High level At the Read Position ON Low level 2 Document Set SW352 When a document is set the SW becomes ON and the input signal of IC301 15 pin Operation becomes a low level When there is no document the SW becomes ON and the input signal of IC301 15 pin Operation becomes a high level Operation Board Photo transi...

Page 157: ...gital becomes a high level Digital Board Photo transistor Signal IC501 130 pin Cover open or no film OFF High level Cover closed and set a film ON Low level 4 Hook Switch SW101 When the handset is lifted the switch turns ON and the signal at pin 56 of IC501 becomes low When the handset is returned the switch turns OFF and the signal at pin 56 of IC501 becomes high Digital Board SW Signal IC501 56 ...

Page 158: ...vel Usually the shelter plate is lifted the photo transistor becomes ON and the input signal of IC501 131 pin becomes a low level Photo transistor Signal IC501 131 pin Set recording paper OFF High level No recording paper ON Low level 6 Motor Position Sensor SW102 This sensor is a detection switch for recording the position of the CAM Signal IC501 81 pin Home position Low level Other High level 15...

Page 159: ...e four permanent organizations of the International Telecommunications Union ITU investigates and make recommendations on international standards for facsimiles 2 Definition of Each Group Group I G1 Official A 4 size documents without using formats which reduce the band width of a signal are sent over telephone lines Determined in 1968 Transmission for about 6 minutes at a scanning line density of...

Page 160: ...nsists of the following Control time This is time at the start of transmission when the functions at the sending and receiving sides are confirmed the transmission mode is established and transmission and reception are synchronized Image transmission time This is the time required for the transmission of document contents image data In general this time is recorded in the catalog etc Hold time Thi...

Page 161: ... signals added to them Data signals are added to DIS and DCS signals Signal DIS Digital Identification Signal Identification Signal Format 00000001 Function Notifies the capacity of the receiving unit The added data signals are as follows Signal DCS Digital Command Signal Identification Signal Format X1000001 Example Some models do not support the following items Bit No DIS DTC DCS 1 Transmitter T...

Page 162: ...and B4 364 mm Invalid Maximum recording length A4 297 mm Unlimited B4 364 mm Invalid 21 22 23 0 0 0 0 0 1 0 1 0 1 0 0 0 1 1 1 1 0 1 0 1 1 1 1 Minimum scan line time capability of the receiver 20 ms at 3 85 l mm T7 7 T3 85 40 ms at 3 85 l mm T7 7 T3 85 10 ms at 3 85 l mm T7 7 T3 85 5 ms at 3 85 l mm T7 7 T3 85 10 ms at 3 85 l mm T7 7 1 2 T3 85 20 ms at 3 85 l mm T7 7 1 2 T3 85 40 ms at 3 85 l mm T7...

Page 163: ...Training Check Sends 0 continuously for 1 5 seconds at the same speed as the training signal CFR Confirmation to Receive X0100001 Notifies the sending side that TCF has been properly received If TCF is not properly received FTT Failure To Train X0100010 is relayed to the sender The sender then reduces the transmission speed by one stage and initiates training once again Training 2 Used for reconfi...

Page 164: ...b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format 164 KX FP85 ...

Page 165: ...h is received from the telephone line passes through the NCU section and enters pin 60 of the modem IC505 The signals that enter pin 60 of the modem IC505 are demodulated in the board to digital image signals then placed on the data bus In this case the image signals from the telephone line are transmitted serially Hence they are placed on the bus in 8 bit units Here the internal equalizer circuit...

Page 166: ...alog section are output mainly from ASIC IC501 and the analog status is stored as data in ASIC IC501 2 Circuit Operation NCU Network Control Unit The NCU comprises of the following DC loop forming circuit to connect with the telephone line Switching circuit for other interconnected telephones Bell detection circuit Pulse dial generation circuit Extension phone line off hook detection circuit Sidet...

Page 167: ...6 7 1 ANALOG UNIT BLOCK DIAGRAM 167 KX FP85 ...

Page 168: ...4 20 31 R610 C616 IC505 60 6 8 3 BELL DETECTION CIRCUIT 1 Circuit Operation The signal waveform for each section is indicated below The signal low level section input to pin 148 of ASIC IC501 on the digital board is illustrated TEL LINE PC102 1 2 4 IC501 148 Bell 6 8 4 PULSE DIAL CIRCUIT AND ON OFF HOOK CIRCUIT While OFF HOOK RL101 is ON Q108 turns on by pin 18 of IC501 as well On the other hand w...

Page 169: ...etect that the telephone connected in parallel to the same line is OFF HOOK while the unit picks up the line 2 Circuit Operation If the line is picked up C104 is charged by the following path shown below Tip Ring D118 R185 D115 R182 Q111 PC104 If a telephone connected in parallel goes into OFF HOOK status the base of Q111 becomes low and PC104 turns OFF When the line is connected Q111 and PC104 tu...

Page 170: ...in an FSK Frequency Shift Keying format Data 0 is a 1200 Hz sine wave and data 1 a 2200 Hz sine wave There are two type of the message format which can be received i e the single data message format and multiple data message format The multiple data format allows to transmit the name and data code information in addition to the time and telephone number data When there is multiple data in the unit...

Page 171: ...171 KX FP85 ...

Page 172: ... CHECK SHEET P 76 6 9 3 HANDSET CIRCUIT 1 Function This circuit controls the conversation over the handset i e the transmitted and received voices to and from the handset 2 Signal path Refer to 2 3 7 1 CHECK SHEET P 76 6 9 4 MONITOR CIRCUIT FOR EACH SIGNALS 1 Function This circuit monitors various tones such as 1 DTMF tone 2 Alarm Beep Key tone Bell 3 Dummy ring back tone 2 Signal path Refer to 2 ...

Page 173: ...The unit consists of a LCD Liquid crystal display KEYs and LEDs light emitting diodes They are controlled by the Gate Array IC301 and ASIC IC501 on the DIGITAL BOARD Fig a The key matrix table is shown below Key Matrix 173 KX FP85 ...

Page 174: ...the data bus D4 D7 V0 is supplied for the crystal drive R303 R377 and R305 R379 are density control resistors Consequently in this unit the timing positive clock is generated by the LCD interface circuitry in the gate array IC301 Density Normal Dark LED1 IC301 22pin H L 174 KX FP85 ...

Page 175: ...t The filter circuit decreases the noise voltage and the noise electric field strength Rectifier Circuit The input current is rectified by D101 D102 D103 and D104 and charges C106 to make DC voltage Then it supplies power to the converter circuit Kick on voltage circuit Bias is applied to the Q101 gate via this circuit when the AC power is turned on and Q101 begins operating 175 KX FP85 ...

Page 176: ...ows L D1 Load L Then the power is supplied to the Load When Q1 is ON power is not output from the secondary side The output voltage is fed back in the control IC according to the error amp rectifier Then depending on how TON is controlled stabilization occurs Also when the current load becomes too large in order to decrease the voltage output the increase in is controlled and the output voltage is...

Page 177: ...ltage of the 24V circuit increases the current of the photo coupler PC101 increases the pulse width of the output control IC becomes narrower and the ON period of Q101 becomes shorter Over Current Limiter O C L The highest drain current Q101 is limited by a limiter circuit IC101 of 24V The 24V output is limited by this circuit Over Voltage Circuit If the 24V output increases because the error dete...

Page 178: ...7 TERMINAL GUIDE OF THE IC S TRANSISTORS AND DIODES 178 KX FP85 ...

Page 179: ...8 FIXTURES AND TOOLS 179 KX FP85 ...

Page 180: ...9 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 9 1 OPERATION PANEL SECTION 180 KX FP85 ...

Page 181: ...9 2 UPPER CABINET SECTION 181 KX FP85 ...

Page 182: ...9 2 1 BACK COVER SECTION 9 2 1 1 BACK COVER 1 182 KX FP85 ...

Page 183: ...9 2 1 2 BACK COVER 2 183 KX FP85 ...

Page 184: ...9 3 LOWER P C B SECTION CROSS REFERENCE 4 1 HOW TO REMOVE THE BOTTOM FRAME P 111 184 KX FP85 ...

Page 185: ...9 4 MOTOR SECTION 9 5 ACTUAL SIZE OF SCREWS AND WASHER 185 KX FP85 ...

Page 186: ...10 ACCESSORIES AND PACKING MATERIALS 186 KX FP85 ...

Page 187: ...t Name Description Remarks 12 PFBX1096X1 BUTTON STOP VOLUME 13 PFBX1097Y1 BUTTON FUNCTION 14 PFBX1095Y1 BUTTON DIALER 15 PFBC1057Y1 BUTTON START 16 PFBC1058Y2 BUTTON SP PHONE 17 Not Used 18 PQJM128Z MICROPHONE 19 PFJS02Q78Z CONNECTOR 2P 11 1 2 UPPER CABINET SECTION 30 PFHX1350Z SPACER THERMAL HEAD 31 PFJS11Q69Z CONNECTOR 11P 32 PFHR1189Z GUIDE THERMAL HEAD LEF 33 PFJHS019Z PRINTER UNIT THERMAL HEA...

Page 188: ... PFDG1149Z GEAR A 139 PFDG1152Z GEAR CAM 140 PFDG1158Z GEAR H 141 PFDG1151Z GEAR C 142 PFDG1153Z GEAR D1 143 PFDG1157Z GEAR G 144 PFDG1156Z GEAR F 145 PFHR1183Z ARM I 146 PFJQ35S1S15D DC MOTOR S 147 PFDG1154Z GEAR D2 148 PFDG1150Z GEAR B Ref No Part No Part Name Description Remarks 149 PFMD1043Z FRAME GEAR BASE COVER 150 PFHR1185Z ARM V 11 1 7 ACCESSORIES AND PACKING MATERIALS A1 PFJA1030Z POWER C...

Page 189: ...GEYJ101 0 L512 ERJ3GEYJ101 0 Ref No Part No Part Name Description Remarks L515 PQ4R18XJ100 0 L521 ERJ8GEY0R00 0 L524 PQ4R18XJ220 0 L526 ERJ3GEY0R00 0 R503 ERJ3GEY0R00 0 R505 ERJ3GEYJ562 5 6k R506 ERJ3GEYJ472 4 7k R507 ERJ3GEY0R00 0 R508 ERJ3GEY0R00 0 R509 ERJ3GEYJ101 100 R510 ERJ3GEY0R00 0 R511 ERJ3GEY0R00 0 R512 ERJ3GEYJ821 820 R513 ERDS1VJ152 1 5k R514 ERJ3GEYJ223 22k R515 ERJ3GEYJ823 82k R517 E...

Page 190: ...Description Remarks C529 ECUV1C104KBV 0 1 C531 ECUV1H150JCV 15P C532 ECUV1H104ZFV 0 1 S C533 ECUV1H104ZFV 0 1 S C534 ECUV1H150JCV 15P C535 ECUV1H104ZFV 0 1 S C537 ECUV1H104ZFV 0 1 S C538 ECUV1H104ZFV 0 1 S C539 ECUV1H104ZFV 0 1 S C540 ECUV1H104ZFV 0 1 S C541 ECUV1H102KBV 0 001 C542 ECUV1H102KBV 0 001 C543 ECUV1H104ZFV 0 1 S C544 ECUV1H104ZFV 0 1 S C546 ECUV1H104ZFV 0 1 S C547 ECUV1H104ZFV 0 1 S C5...

Page 191: ... MA4056 DIODE SI D115 1SS119 DIODE SI D117 1SS119 DIODE SI D118 PFVDDGS1ZB60 DIODE SI D125 1SS119 DIODE SI D126 1SS119 DIODE SI COILS FLT101 PFLE003 COIL S L105 PFVF2B182SDT COIL L106 PFVF2B182SDT COIL L108 PQLQR2KA113T COIL L109 PQLQR2KA113T COIL L110 PQLQR2KA113T COIL Ref No Part No Part Name Description Remarks L111 PQLQR2KA113T COIL CONNECTORS CN101 PQJS17A10Z CONNECTOR 17PIN CN105 PQJP02G100Z...

Page 192: ...0 ECEA1HKS100 10 S C153 ECEA1HKS4R7 4 7 C159 ECEA1CKS100 10 C161 ECUV1H183KBV 0 018 C162 ECUV1H333KDV 0 033 S C165 ECEA1HKS4R7 4 7 C167 ECUV1H102KBV 0 001 Ref No Part No Part Name Description Remarks C171 ECEA1CKS100 10 C172 ECEA1CU221 220 C179 ECKD2H681KB 680P S C180 ECKD2H681KB 680P S C190 ERJ6GEY0R00 0 C198 ECQE2E334KZ 0 33 S C207 ECEA1CKS470 47 S C212 ECUV1C475ZF 4 7 C214 ECUV1H103KBV 0 01 C22...

Page 193: ...05Z SWITCH SW321 PQSH1A105Z SWITCH SW322 PQSH1A105Z SWITCH SW323 PQSH1A105Z SWITCH SW324 PQSH1A105Z SWITCH SW326 PQSH1A105Z SWITCH SW327 PQSH1A105Z SWITCH SW328 PQSH1A105Z SWITCH SW329 PQSH1A105Z SWITCH SW330 PQSH1A105Z SWITCH SW331 PQSH1A105Z SWITCH SW333 PQSH1A105Z SWITCH SW334 PQSH1A105Z SWITCH Ref No Part No Part Name Description Remarks SW335 PQSH1A105Z SWITCH SW351 EVEGB141112B SWITCH 11 5 P...

Page 194: ...180 S C108 ECKD3A102KBP 0 001 C109 ECA1VHG470 47 C119 ECKD3A221KBP 220P C121 ECUV1H472KBN 0 0047 C122 ECUV1C224KBX 0 22 C123 ECUV1H561KBM 560P C124 ECUV1H104KBW 0 1 S C201 PFCEA35F471 470 S C202 ECKD3A102KBP 0 001 C203 PFCEA16A470 470 S C204 PFCEA35A47M 47 S C205 PFCEA50A1M 1 S C206 ECKD3A102KBP 0 001 11 6 FIXTURES AND TOOLS Ref No Part No Part Name Description Remarks EC1 PQZZ2K12Z CONNECTOR 2P E...

Page 195: ... DIAGRAMS Note 1 DC voltage measurements are taken with an oscilloscope or a tester with a ground 2 The schematic diagrams and circuit board may be modified at any time with the development of new technology 3 195 KX FP85 ...

Page 196: ...12 1 MEMO 196 KX FP85 ...

Page 197: ...21 C526 R528 R530 D508 R543 DA501 Q507 R547 C543 R633 R534 C546 R548 R546 C511 C634 R634 R631 R632 C544 R517 C547 C548 C549 R553 C550 R555 R551 C577 R564 C571 C573 C566 R570 R627 R625 R596 C603 R598 R603 R615 C542 C541 R623 R541 R542 R540 R539 R538 R537 R536 R535 L525 R533 R605 C582 R585 Q509 R575 C579 R571 C599 R583 R586 R588 C600 C595 C598 L522 L523 R628 C627 C633 C632 R624 L527 R582 C593 R578 R...

Page 198: ...596 AG C564 R626 R589 R590 Q508 C555 R600 5VA R601 C617 C624 L526 C616 RA506 R573 RA505 IC512 R556 PS501 Q511 L518 C565 C580 R611 R610 C560 C569 L517 5 4 1 3 IC502 R594 R620 CN506 R619 J502 1 7 IC507 CN510 IC506 CN505 C509 R505 C502 R506 5VD 24V R520 R526 1 D505 D506 IC508 CN502 R513 E E Q503 D501 R503 L508 D504 L512 L511 L507 R504 Q512 R529 C527 C522 R527 C528 AMON R531 R532 R613 R614 L502 L501 F...

Page 199: ...31 C185 C191 IC106 R204 C199 R205 C195 R207 C200 R201 R203 R214 C205 C210 R213 R212 R221 C118 Q119 R135 R131 C135 Q113 L108 L109 L111 L110 J105 L105 L106 C194 R198 C193 C110 R223 C117 C124 R118 R122 C126 C161 C224 R176 R175 C107 C104 IC110 C141 R137 C115 C148 R104 C106 R106 C108 R110 R109 C114 R105 BOND MARK R103 C105 C103 R101 C101 R102 C102 R107 C112 C142 R138 R123 C127 C129 R115 C121 R113 C119 ...

Page 200: ...22 RL104 R219 R199 R229 FLT102 C171 C180 C179 D114 D115 D116 C178 C174 AUTO CH T101 T102 D108 D107 C159 R189 ZNR102 J113 R222 R215 PC106 PC107 R173 C164 D111 D109 C198 C196 PC108 PC105 L102 POS101 RL101 L107 R217 D125 D126 C202 IC100 R218 C209 SA101 RL103 F101 SA102 FLT101 D117 PC104 J104 J143 J151 JJ101 JJ130 JJ163 JJ244 JJ132 JJ126 JJ133 JJ157 JJ156 JJ152 JJ259 JJ151 JJ256 JJ255 JJ148 JJ145 JJ15...

Page 201: ...ED303 SW351 SW325 SW311 R378 R377 J323 C365 J304 J333 C361 C363 C364 J305 R375 R376 J306 J308 J313 J319 J312 J311 J310 J309 C367 C358 C359 CN301 CN303 1 1 3 11 C303 C368 C362 R380 R381 J329 J331 R382 R383 J321 R379 J322 CN302 1 14 PFUP1188Z LED301 LED302 J301 C366 SW335 J315 J316 J318 J317 J314 SW324 SW329 SW352 SW353 IC302 C355 R356 C357 R357 C354 3 1 R354 R384 C304 CN301 11 1 C301 C356 R352 C353...

Page 202: ...T RISK OF FIRE REPLACE ONLY WITH SAME TYPE AND RATINGS SECONDARY PRIMARY OF FUSE F101 C206 C204 D202 CN31 L N R101 F101 D104 D103 D102 D101 J1 C102 R137 IC101 R127 C124 R126 R124 C121 D107 J3 R122 R105 R128 D106 R109 C108 R104 D105 L103 C119 R106 T101 R224 C202 D201 R203 C201 IC202 R205 CN301 24 7 1 C203 R202 R108 J4 R103 C105 C103 J3 R102 C106 C101 ZNR101 R136 C123 R125 Q101 C109 D108 PC101 R221 ...

Page 203: ...1 OUTD 12 IND2 13 IND1 14 VCC CN508 1 FG 2 TXD 3 RXD 4 RTS 5 CTS 6 DSR 7 GND 8 DCD 9 DTR 10 RI 11 FG R501 0 R502 0 R504 1K 5VD 5VD NC C506 NC C507 NC C505 12V 12V C511 Z0 1u R518 6 8K Q504 R530 3 9K R528 3 9K C516 35V33u R523 6 8K NC C526 R521 4 7 R516 22 C514 35V33u Q505 D504 R519 8 2K D506 Q506 C524 35V10u R524 15K R525 15 D507 D505 R551 1K EYESYNC EYECLK EYEXY YCLK X503 32 256MHZ R560 100 C561 ...

Page 204: ...18u SW102 3 1 4 2 R141 100 R142 4 7K C146 K0 01u SW101 3 1 2 4 R135 4 7k R131 100 C135 K0 01u 5VA J143 C209 R218 L103 L104 J119 D122 D121 C196 47K 1 2W R202 R199 C184 C189 C188 C187 C186 Q116 R192 R191 R189 C177 ZNR102 C174 C173 D116 D 114 Q114 R183 R182 6 8k C172 16V 220u C171 16V 10u R179 R180 C169 R178 R173 R171 R181 Q112 Q110 Q109 Q108 R166 R168 C166 D110 D112 D111 C162 K0 033u R155 0 R151 2 2...

Page 205: ...11 16 9 XL10 19 XL13 18 GND 20 XL14 39 GND 21 XL15 C351 5V3 R310 R311 LED302 C354 Z0 1u 5V3 R355 22k R353 12k 2 IC302 1 2 3 4 8 C353 K0 015u 5V3 R356 330k 1 IC302 5 6 7 C355 J180p R354 6 8k C356 0 SW352 3 1 4 2 R315 100 C316 K0 01u R314 4 7k SW353 3 1 4 2 R317 100 C317 K0 01u R316 4 7k 5V2 5V2 SW305 AUTO ANSWER SW310 IQ FAX SW315 8 SW320 7 SW325 INTERCOM SW330 DIRECTORY PROGRAM SW335 5V2 CN303 1 M...

Page 206: ... 047 C103 1000p L101 ZNR101 R101 1M 470V L N CN31 1 GND R127 PC101 C124 0 1 1 8K C101 0 1 F101 SA125V D104 R105 0 22 2 R124 180 C121 4700p 4 5 3 6 2 7 1 8 R122 620 R125 10K D107 IC101 D108 R108 15 IC202 R128 180 D106 Q101 G R104 100K 1 T101 TRANS D201 1 24V 2 24V 3 24V 4 GND CN301 5 GND 6 GND 7 5V C202 1000p 1K D201 C206 1000p R223 IC201 C205 1 50 100 D S R203 47 C204 47 35 Cycle 12 4 µs 55V 25V 0...

Page 207: ...207 KX FP85 Y Q KXFP85 Printed in Japan ...

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