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Panasonic KX-TG6841B Service Manual

Summary of KX-TG6841B

  • Page 1

    © panasonic system networks co., ltd. 2013 unauthorized copying and distribution is a violation of law. Order no. Km41302656ce f13 telephone equipment model no. Kx-tg6841b kx-tg6842b kx-tg6843b kx-tg6844b kx-tg6845b kx-tg6873b kx-tga680b kx-tga20b digital cordless answering system b: black version (...

  • Page 2

    2 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b warning this service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of poten...

  • Page 3: Table of Contents

    3 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b table of contents page page 1 safety precautions----------------------------------------------- 5 1.1. For service technicians --------------------------------- 5 2 warning ------------------------------------------------...

  • Page 4

    4 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.1. Cabinet and electrical parts (base unit) ----------- 81 16.2. Cabinet and electrical parts (handset) ------------- 82 16.3. Cabinet and electrical parts (charger unit) ------- 83 16.4. Accessories and packing materi...

  • Page 5: 1 Safety Precautions

    5 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 1 safety precautions 1.1. For service technicians • repair service shall be provided in accordance with repair technology information such as service manual so as to prevent fires, injury or electric shock, which can be c...

  • Page 6

    6 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 2.2. About lead free solder (pbf: pb free) note: in the information below, pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that contains lead. We will use pbf solder when...

  • Page 7: 3 Specifications

    7 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 3 specifications note: • design and specifications are subject to change without notice. Note for service: • operation range: up to 300 m outdoors, up to 50 m indoors, depending on the condition. • analog telephone connec...

  • Page 8: 4 Technical Descriptions

    8 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4 technical descriptions 4.1. Us-dect description the frequency range of 1.92 ghz-1.93 ghz is used. Transmitting and receiving carrier between base unit and handset is same frequency. Refer to frequency table (p.61). 4.1....

  • Page 9

    9 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.1.3. Signal flowchart in the radio parts reception base unit: a voice signal from tel line is encoded to digital data and converted into a 1.9ghz modulated radio signal by bbic(ic501). The rf signal, after which is ampl...

  • Page 10

    10 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.2. Block diagram (base unit_main) operational p.C. Board d101 charge_contact + - sp x501 13.824 mhz mic +- ant 2 ant 1 tel jack l1t l1r dcp dcm dc jack rly side tone circuit q161 q141 bell detect hook bell q111 lin lou...

  • Page 11

    11 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.3. Block diagram (base unit_rf part) kx-tg6841/6842/6843/6844/6845/6873 block diagram (base unit_rf part) da802 ant2 ant1 rxp rxn ant2 ant1 txp txn.

  • Page 12

    12 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.4. Circuit operation (base unit) general description: (bbic, flash memory, eerrom) is a digital speech/signal processing system that implements all the functions of speech compression, record and playback, and memory m...

  • Page 13

    13 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.4.4. Power supply circuit/reset circuit the power supply voltage from ac adaptor is converted to vbat (3.0v) in ic302. And +3.0v for peripherals and analog part is insulated from vbat by doubler of bbic. Circuit operat...

  • Page 14

    14 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.4.4.1. Charge circuit the voltage from the ac adaptor is supplied to the charge circuits. D362 r372 r371 d361 charge+ f301 dcp charge- ( ) +5.5v dcm.

  • Page 15

    15 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.4.5. Telephone line interface telephone line interface circuit: function • bell signal detection • on/off hook and pulse dial circuit • side tone circuit bell signal detection and off hook circuit: in the idle mode, q1...

  • Page 16

    16 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.4.6. Parallel connection detect circuit/auto disconnect circuit function: in order to disable call waiting and stutter tone functions when using telephones connected in parallel, it is necessary to have a circuit that ...

  • Page 17

    17 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.4.7. Calling line identification (caller id)/call waiting caller id function: caller id the caller id is a chargeable id which the user of a telephone circuit obtains by entering a contract with the telephone company t...

  • Page 18

    18 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b call waiting caller id calling identity delivery on call waiting (cidcw) is a class service that allows a customer, while off-hook on an existing call, to receive information about a calling party on a waited call. The t...

  • Page 19

    19 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.5. Block diagram (handset) ic1 ic3 mip min hsspoutp lout hsmip headset_det spoutp spoutn ckm//stm ckm/stm bbic reset chg_ctl battery_on chg_det wp, clk, data keystorobe_a~e keyin_1~5 charge mic receiver headset jack cn...

  • Page 20

    20 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.6. Block diagram (handset_rf part) kx-tga680 block diagram (handset_rf part) rxp rxn ant txp txn.

  • Page 21

    21 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.7. Circuit operation (handset) 4.7.1. Outline handset consists of the following ics as shown in block diagram (handset) (p.19). • dect bbic (base band ic): ic1 - all data signals (forming/analyzing ack or cmd signal) -...

  • Page 22

    22 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.7.3. Charge circuit circuit operation: when charging the handset on the base unit, the charge current is as follows; dcp(5.5v) → f301 → r371 → r372 → d362 → charge+(base) → charge+(handset) → r8 → q3 → f1 → battery+......

  • Page 23

    23 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.8. Behavior of electric power failure in case that the power from ac adaptor is lost and lose radio waves, bbic (ic1) turns q11 on since handset presumes that base unit's power is falied. Base unit detects that power v...

  • Page 24

    24 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 4.10. Signal route note: : inside of handset handset mic - c11/13 - ra4 - ic1(22/23) - - ant. --- ---ant. - - ic501(46/47 - 28) - c184 - q161 - q141 - d101 - p101 - t/r(tel line) t/r(tel line) - p101 - d101 - q141 - r165...

  • Page 25

    25 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b rf part signal route signal route in 㸢㩷 route 㸢㩷 out handset rf [ tx_route ] handset rf [ rx_route ] base unit rf [ tx_route ] base unit rf [ rx_route ] ic1(44/45) - c802 - c808 - ant ant - c808 - c801 - ic1(46/47) ic501...

  • Page 26: 6 Installation Instructions

    26 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 5 location of controls and components refer to the operating instructions. Note: you can download and refer to the operating instructions (instruction book) on tsn server. 6 installation instructions refer to the operati...

  • Page 27: 8 Test Mode

    27 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 8 test mode 8.1. Engineering mode 8.1.1. Base unit important: make sure the address on lcd is correct when entering new data. Otherwise, you may ruin the unit. 1). Press { menu } . 2). Select "initial setting" using or t...

  • Page 28

    28 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b frequently used items (base unit) ex.) note: (*1) when you enter the address or new data, please refer to the table below. Items address default data new data remarks frequency 00 07 / 00 08 00/01 - - use these items in ...

  • Page 29

    29 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 8.1.2. Handset important: make sure the address on lcd is correct when entering new data. Otherwise, you may ruin the unit. H/s key operation h/s lcd 1). Press { menu } . 2). Select "initial setting" using or then press ...

  • Page 30

    30 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b frequently used items (handset) ex.) note: (*1) when you enter the address or new data, please refer to the table below. (*2) use these items in a read-only mode to confirm the contents. Careless rewriting may cause seri...

  • Page 31: 9 Service Mode

    31 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 9 service mode 9.1. How to clear user setting (handset only) handset press , , , simultaneously until a beep sound is heard. Then single handset is initialized. (the contents of user setting are reset to factory default)...

  • Page 32: 10 Troubleshooting Guide

    32 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 10 troubleshooting guide 10.1. Troubleshooting flowchart cross reference: check power (p.33) check playback (p.37) check record (p.34) check battery charge (p.37) check link (p.38) check the rf part (p.40) check handset ...

  • Page 33

    33 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 10.1.1. Check power 10.1.1.1. Base unit cross reference: power supply circuit/reset circuit (p.13) note: bbic is ic501. (*1) refer to specifications (p.7) for part number and supply voltage of ac adaptor. (*2) refer to c...

  • Page 34

    34 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 10.1.2. Check record 10.1.2.1. Base unit not record incoming message cross reference: signal route (p.24) telephone line interface (p.15) parallel connection detect circuit/auto disconnect circuit (p.16) note: flash memo...

  • Page 35

    35 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b a) auto disconnect activation time: some telephone company lines (fiber or cable) on hook and off hook voltages are lower than conventional lines, which may cause a malfunction of auto disconnect detection. To solve this...

  • Page 36

    36 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b b) vox level: it makes easier to detect a small voice (caller) by raising the sensitivity of vox level. Therefore, the recording of tam is not turned off during detection. 1) ~ 2) are same as (a). 3) press "5","1","1". 4...

  • Page 37

    37 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 10.1.3. Check playback 10.1.3.1. Base unit cross reference: power supply circuit/reset circuit (p.13) note: flash memory is ic601. Bbic is ic1. (*1) refer to circuit board (base unit_main) (p.75). 10.1.4. Check battery c...

  • Page 38

    38 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 10.1.5. Check link 10.1.5.1. Base unit cross reference: power supply circuit/reset circuit (p.13) check the rf part (p.40) note: refer to things to do after replacing ic or x'tal (p.53)(p.59) for base unit. *1 how to adj...

  • Page 39

    39 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 10.1.5.2. Handset cross reference: power supply circuit/reset circuit (p.21) check the rf part (p.40) note: refer to things to do after replacing ic or x'tal (p.54)(p.60) for handset. *1 how to adjust the frequency of x1...

  • Page 40

    40 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 10.1.6. Check the rf part 10.1.6.1. Finding out the defective part after all the checkings or repairing 1. Re-register the checked handset to the checked base unit, and regular hs to regular bu. Note: (*1) hs: handset (*...

  • Page 41

    41 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 10.1.6.2. Rf check flowchart each item (1 ~ 5) of rf check flowchart corresponds to check table for rf part (p.42). Please refer to the each item. Note: (*1) refer to check link (p.38). Start link confirmation normal 1 c...

  • Page 42

    42 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 10.1.6.3. Check table for rf part note: (*1) refer to commands (handset) (p.56) (*2) refer to commands (base unit) (p.56) (*3) adjustment standard (base unit) (p.57) (*4) adjustment standard (handset) (p.58) no. Item bu ...

  • Page 43

    43 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 10.1.6.4. Test range check circuit block which range is defective can be found by the following check. Chart1: setting of tx power and rx sensitivity in range confirmation tx test, rx test note: (*1) refer to commands (b...

  • Page 44

    44 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 10.1.7. Registering a handset to the base unit 10.1.8. Deregistering a handset {menu} i # 1 3 0 l l l l the supplied handset and base unit are pre-registered. If for some reason the handset is not registered to the base ...

  • Page 45

    45 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 10.1.9. Check handset transmission cross reference: signal route (p.24) 10.1.10. Check handset reception cross reference: signal route (p.24) note: when checking the rf part, refer to check the rf part (p.40). 10.1.11. C...

  • Page 46

    46 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 11 disassembly and assembly instructions 11.1. Disassembly instructions 11.1.1. Base unit cabinet cover solders 5 screws main p.C. Board pararell wire Ԙ remove the 5 screws to remove the cabinet cover. ԙ remove the solde...

  • Page 47

    47 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 2 screws jack holder operational p.C.B board 4 screws ԛ remove the 2 screws to remove the jack holder. Ԝ remove the 4 screws to remove the operational p.C.B board..

  • Page 48

    48 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 11.1.2. Handset remove the 2 screws. Insert a jig (pqdj10006y) between the cabinet body and the cabinet cover, then pull it along the gap to open the cabinet. Likewise, open the other side of the cabinet. Remove the cabi...

  • Page 49

    49 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 11.1.3. Charger unit 2 charge terminals Ԙ unhook the click of one side. ԙ then unhook the other one..

  • Page 50

    50 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 11.2. How to replace the base unit lcd Ԙ ԙ fit the heatseal of a new lcd. Rubber of soldering iron (part no. Pqzz430prb) tip of soldering iron (part no. Pqzz430pir) heatweld with the tip of the soldering iron about 5 to ...

  • Page 51

    51 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b Ԛ ԛ attach the lcd and fix by hook a (two points). Solder the wires. A a.

  • Page 52

    52 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 11.3. How to replace the handset lcd note: the illustrations are simplified in this page. They may differ from the actual product. Peel off the ffc (flexible flat cable) from the lcd, in the direction of the arrow. Take ...

  • Page 53

    53 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 12 measurements and adjustments this chapter explains the measuring equipment, the jig connection, and the pc setting method necessary for the measurement in troubleshooting guide (p.32) 12.1. Equipment required • digita...

  • Page 54

    54 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 12.2.2. Connections (handset) connect the dc power or battery to batt+ and batt-. Connect the jig cable gnd (black) to gnd. Connect the jig cable utx (yellow) to utx and urx (red) to urx. Note: *: com port names may vary...

  • Page 55

    55 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 12.2.3. How to install batch file into p.C. Note: • “*****” varies depending on the country or models. 1. Insert the batch file cd-rom into cd-rom drive and copy pnzztg**** folder to your pc (example: d drive). 2. Open a...

  • Page 56

    56 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 12.2.4. Commands (base unit) see the table below for frequently used commands. 12.2.5. Commands (handset) see the table below for frequently used commands. Command name function example rdeeprom read the data of eeprom t...

  • Page 57

    57 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 12.3. Adjustment standard (base unit) when connecting the simulator equipment for checking, please refer to below. 12.3.1. Bottom view note: (*1) refers to no.2 of check check table for rf part (p.42) (*2) refers to powe...

  • Page 58

    58 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 12.4. Adjustment standard (handset) when connecting the simulator equipment for checking, please refer to below. 12.4.1. Component view note: (*1) refers to no.2 of check check table for rf part (p.42) (*2) refers to pow...

  • Page 59

    59 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 12.5. Things to do after replacing ic or x'tal if repairing or replacing eeprom and x'tal, it is necessary to download the required data such as programming data or adjustment data, etc in memory. The set doesn't operate...

  • Page 60

    60 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 12.5.1.2. Handset first, operate the pc setting according to the setting method of jig (p.53). Then download the appropriate data according to the following procedures. Note: (*2) xxx_yyy: revision number “xxx” and “yyy”...

  • Page 61

    61 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 12.6. Frequency table ch. (hex) tx/rx frequency (mhz) channel 0 00 1928.448 channel 1 01 1926.720 channel 2 02 1924.992 channel 3 03 1923.264 channel 4 04 1921.536.

  • Page 62: 13 Miscellaneous

    62 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 13 miscellaneous 13.1. How to replace the llp (leadless leadframe package) ic note: this description only applies to the model with shield case. 13.1.1. Preparation • pbf (: pb free) solder • soldering iron tip temperatu...

  • Page 63

    63 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 13.1.4. How to install the ic 1. Place the solder a little on the land where the radiation gnd pad on ic bottom is to be attached. 2. Place the solder a little on the land where ic pins are to be attached, then place the...

  • Page 64

    64 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 13.2. How to replace the flat package ic even if you do not have the special tools (for example, a spot heater) to remove the flat ic, with some solder (large amount), a soldering iron and a cutter knife, you can easily ...

  • Page 65

    65 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 13.2.3. How to install the ic 1. Temporarily fix the flat package ic, soldering the two marked pins. *check the accuracy of the ic setting with the corresponding soldering foil. 2. Apply flux to all pins of the flat pack...

  • Page 66

    66 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 13.3. Terminal guide of the ics, transistors and diodes 13.3.1. Base unit 13.3.2. Handset b c e c b e 2sc6054jsl, b1abdm000001 b1adnb000003, drc9113z0l b1adcf000040, b1gbcfga0021 2sa1576s, b1gbcfyy0020 1 4 8 5 pnwi1tg684...

  • Page 67: 14 Schematic Diagram

    67 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 14 schematic diagram 14.1. For schematic diagram 14.1.1. Base unit (schematic diagram (base unit_main)) notes: 1. Dc voltage measurements are taken with voltmeter from the negative voltage line. 2. The schematic diagrams...

  • Page 68

    68 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 14.2. Schematic diagram (base unit_main) jt a g_tdo urx jtag_tms utx jt a g_tdi jt a g_tms jtag_rtck jt a g_tck bell charge_det lcd_blt msg_led ans_led keys_d msg_led ans_led jtag_tdo jtag_tdi jtag_tck jt a g_r tck lcd_c...

  • Page 69

    69 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b ! Utx urx eep_wp spi_cs eep_sd a spi_clk eep_scl lcd_cs spi_do spi_di bell hook lcd_rst sp_led charge_det hook spi2_clk spi2_do lcd_cd keys_a keys_b spi_clk spi_do spi_di eep_wp spi_cs eep_sd a eep_scl keyin5 keys_e keyi...

  • Page 70

    70 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 14.3. Schematic diagram (base unit_operation) msg skip down rpt up pcb carbon_test ct1 *led912 green a k gnd ct2 key_pcb+ key_pcb- lcd_light *led911 green a k cn901 cn901 cn901 cn901 cn901 cn901 cn901 cn901 cn901 cn901 c...

  • Page 71

    71 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 14.4. Schematic diagram (base unit_led) led kx-tg6841/6842/6843/6844/6845/6873 schematic diagram (handset_led).

  • Page 72

    72 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 14.5. Schematic diagram (handset_main) stb_d kin_4 chg_cur stb_e stb_cstb_c key_led eep_wp eep_scl eep_sda eep_wp stb_d lcd_reset lcd_sid lcd_scl lcd_cs lcd_cd kin_1 kin_2 kin_3 kin_4 kin_5 stb_a stb_b urx utx stb_c stb_...

  • Page 73

    73 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b nc: no components kx-tga680 schematic diagram (handset_main) chg_det chg_ctrl headset_det c97 10p c96 10p c42 nc c39 nc c52 d10p c53 12p r1 nc gnd gnd gnda r27 2.2k r23 390 gnda gnda gnda gnd gnd gnd rf-shield nc c98 nc ...

  • Page 74

    74 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b memo.

  • Page 75: 15 Printed Circuit Board

    75 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 15 printed circuit board 15.1. Circuit board (base unit_main) 15.1.1. Component view q654 p101 sa101 sa102 sa103 r651 r652 r654 c819 c651 c652 c653 c654 c655 c656 c657 c658 c659 r891 r892 c662 c663 c664 q701 c665 q702 c6...

  • Page 76

    76 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 15.1.2. Bottom view q661 q662 q663 l474 l476 c601 r451 c611 f301 r661 r663 r664 r665 r666 ra151 c451 c452 c454 c455 c456 c457 c458 c459 q111 c460 c461 c661 c472 c473 c476 c477 c478 c479 ic601 q142 ic611 q351 q352 q353 q1...

  • Page 77

    77 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 15.2. Circuit board (base unit_operation) 15.3. Circuit board (base unit_led) a lcd # * redial 0 1 4 7 2 5 8 3 6 9 loca t msg sp-phone led901 led902 led904 do wn cell1 cell2 r906 st op c901 c902 flash rpt erase skip hold...

  • Page 78

    78 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b memo.

  • Page 79

    79 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 15.4. Circuit board (handset_main) 15.4.1. Component view c20 c21 c22 c23 c24 c25 c26 c27 c29 c30 c31 c32 c33 c34 c35 c36 c37 rtck c39 3.0v c41 c42 c43 c44 ant-short-gnd c45 chg+ chg- gnd_j c51 c52 c53 c56 c57 c58 c59 c6...

  • Page 80

    80 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 15.4.2. Bottom view cn3_c 0 1 3 2 4 ast 5 6 7 8 9 led1 led3 led2 led4 led5 led6 led20 left down flash right nr sp off sharp up mic soft_a soft_c talk kx-tga680 circuit board (handset_main (bottom view)) a.

  • Page 81

    81 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16 exploded view and replacement parts list 16.1. Cabinet and electrical parts (base unit) note: (*1) this cable is fixed by heat-sealing. Refer to how to replace the base unit lcd (p.50). Ref.No. Figure a 2.6 x 8mm 1 14...

  • Page 82

    82 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.2. Cabinet and electrical parts (handset) note: (*1) this cable is fixed by heat-sealing. Refer to how to replace the handset lcd (p.52). (*2) the rechargeable ni-mh battery hhr-4dpa is available through sales route o...

  • Page 83

    83 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.3. Cabinet and electrical parts (charger unit) 200 200-1 200-2 200-3 200-4 200-2 200-5 201.

  • Page 84

    84 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.4. Accessories and packing materials 16.4.1. Kx-tg6841b a3 p2 p2 p2 p2 p2 p2 a2 a1 a4 p1.

  • Page 85

    85 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.4.2. Kx-tg6842b a103 p102 p102 a101 a102 a104 p101 (*1) p102 note: (*1) this pad is a piece of ref no.P101 (gift box)..

  • Page 86

    86 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.4.3. Kx-tg6843b a203 p202 a204 a202 p201 p202 p202 p202 p202 p202 p202 a201.

  • Page 87

    87 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.4.4. Kx-tg6844b a303 p302 p302 a302 a301 a304 p301 p302 p302 p302 p302 p302.

  • Page 88

    88 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.4.5. Kx-tg6845b p402 p402 a401 p401 p402 p402 p402 a402 a404 a403 p402 p402 p402.

  • Page 89

    89 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.4.6. Kx-tg6873b p502 p502 a501 p501 p502 a502 a506 a503, a504, a505 p502 p502 p502 p502.

  • Page 90

    90 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.4.7. Kx-tga680b note: (*1) this pad is a piece of ref no.P601 (gift box). P601 p602 (*1) a602 a601.

  • Page 91

    91 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.5. Replacement parts list 1. Rtl (retention time limited) note: the “rtl” marking indicates that its retention time is limited. When production is discontinued, this item will continue to be available only for a speci...

  • Page 92

    92 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.5.1.3. Operational p.C. Board parts 16.5.1.4. Led board parts r133 erj3geyj334 330k s r141 d0gb104ja057 100k r142 pq4r18xj272 2.7k s r145 d0ga222ja021 2.2k r151 d0ga104ja021 100k r152 erj2gej134x 130k s r160 erj3geyj8...

  • Page 93

    93 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.5.2. Handset 16.5.2.1. Cabinet and electrical parts 16.5.2.2. Main p.C. Board parts note: (*1) reconfirm the model no. Written on the handset's name plate when replacing pcb100. Because the model no. Of the optional h...

  • Page 94

    94 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.5.3. Charger unit 16.5.3.1. Cabinet and electrical parts 16.5.4. Accessories and packing materials note: (*1) you can download and refer to the operating instructions (instruction book) on tsn server. 16.5.4.1. Kx-tg6...

  • Page 95

    95 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b 16.5.5. Screws 16.5.6. Fixtures and tools note: (*1) see equipment required (p.53), and the setting method of jig (p.53) (*2) when replacing the handset lcd, see how to replace the handset lcd (p.52) t.I/n kxtg6841b kxtg...

  • Page 96: Telephone Equipment

    © panasonic system networks co., ltd. 2014 unauthorized copying and distribution is a violation of law. Order no. Km41401275se f13 telephone equipment model no. Kx-tg6841b kx-tg6842b kx-tg6843b kx-tg6844b kx-tg6845b kx-tg6873b kx-tga680b kx-tga20b digital cordless answering system b: black version (...

  • Page 97: 1 Replacement Parts List

    2 kx-tg6841b/kx-tg6842b/kx-tg6843b/kx-tg6844b/kx-tg6845b/kx-tg6873b/kx-tga680b/kx-tga20b 1 replacement parts list 1.1. Reference chart 1.2. Original and new parts comparison lists oy kxtg6841b kxtg6842b kxtg6843b kxtg6844b kxtg6845b kxtg6873b kxtga680b kxtga20b reason for change *the following items...