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Panasonic KX-TG234SK Service Manual

Summary of KX-TG234SK

  • Page 1

    © panasonic system networks co., ltd. 2012 unauthorized copying and distribution is a violation of law. Order no. Km41202541ce f13 telephone equipment model no. Kx-tg234sk kx-tga470b digital cordless answering system b: black version (for u.S.A.) (handset) kx-tga470b kx-tg4741b (base unit) (charger ...

  • Page 2

    2 kx-tg234sk/kx-tga470b 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 potential dangers in attempting to service a product. Produc...

  • Page 3: Table of Contents

    3 kx-tg234sk/kx-tga470b table of contents page page 1 safety precautions----------------------------------------------- 4 1.1. For service technicians --------------------------------- 4 2 warning -------------------------------------------------------------- 4 2.1. Battery caution------------------...

  • Page 4: 1 Safety Precautions

    4 kx-tg234sk/kx-tga470b 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 caused by improper repair work. 1. When repair services ...

  • Page 5

    5 kx-tg234sk/kx-tga470b 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 discussing the lead free solder used in our manufactur...

  • Page 6: 3 Specifications

    6 kx-tg234sk/kx-tga470b 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 connection: telephone line • optional headset: kx-tca60, kx-t...

  • Page 7: 4 Technical Descriptions

    7 kx-tg234sk/kx-tga470b 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.60). 4.1.1. Tdd frame format 4.1.2. Tdma system this system is t...

  • Page 8

    8 kx-tg234sk/kx-tga470b 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 amplified in bbic, is fed to selected antenna. Handset: as ...

  • Page 9

    9 kx-tg234sk/kx-tga470b 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 lout rf_part hsmip hsmin ic501 bbic inuse detect 2 inuse de...

  • Page 10

    10 kx-tg234sk/kx-tga470b 4.3. Block diagram (base unit_rf part) kx-tg234 block diagram (base unit_rf part) da801 ant2 ant1 txon rxon rxp rxn ant2 ant1 txp txn.

  • Page 11

    11 kx-tg234sk/kx-tga470b 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 management required in a digital telephone answering mac...

  • Page 12

    12 kx-tg234sk/kx-tga470b 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 operation: 5.5v vbat rstn(reset) pin 54 vbat pin 10 pin 57 pi...

  • Page 13

    13 kx-tg234sk/kx-tga470b 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- ( ) c306 +5.5v dcm.

  • Page 14

    14 kx-tg234sk/kx-tga470b 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, q141 is open to cut the dc loop current and decrease the ...

  • Page 15

    15 kx-tg234sk/kx-tga470b 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 judges whether a telephone connected in parallel is in ...

  • Page 16

    16 kx-tg234sk/kx-tga470b 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 to utilize a caller id service. For this reason, the ope...

  • Page 17

    17 kx-tg234sk/kx-tga470b 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 transmission of the calling information takes place almo...

  • Page 18

    18 kx-tg234sk/kx-tga470b 4.5. Block diagram (handset) ic1 ic3 mip min hsspoutp lout bell_led hsmip headset_det spoutp spoutn ckm//stm ckm/stm bbic reset chg_ctl chg_det wp, clk, data keystorobe_a~e keyin_1~5 charge q3 mic receiver headset jack cn431 led monitor sp lcd charge pump ic4 keys rf part an...

  • Page 19

    19 kx-tg234sk/kx-tga470b 4.6. Block diagram (handset_rf part) kx-tga470 block diagram (handset_rf part) da801 txon rxon rxp rxn ant txp txn.

  • Page 20

    20 kx-tg234sk/kx-tga470b 4.7. Circuit operation (handset) 4.7.1. Outline handset consists of the following ics as shown in block diagram (handset) (p.18). • dect bbic (base band ic): ic1 - all data signals (forming/analyzing ack or cmd signal) - all interfaces (ex: key, detector circuit, charge, eep...

  • Page 21

    21 kx-tg234sk/kx-tga470b 4.7.3. Charge circuit circuit operation: when charging the handset on the base unit, the charge current is as follows; dc+(6.5 v) → f301 → r371 → r372 →charge+(base) → charge+(handset) → q4 → d7→ f1 → battery+... Battery... Battery- → r45 → gnd → charge-(handset)→ charge-(ba...

  • Page 22

    22 kx-tg234sk/kx-tga470b 4.9. Signal route note: : inside of handset handset mic - r73/74 - c11/13 - ra4 - ic1(22/23) - - ant. --- ---ant. - - ic501(46/47 - 28) - c184 - q161 - q141 - d101 - l101/[l102 - p101] - t/r(tel line) t/r(tel line) - l101/[p101 - l102] - d101 - q141 - r165 - r177 - c173 - q1...

  • Page 23

    23 kx-tg234sk/kx-tga470b 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) - l809 - c812 - da801 - c803 - c801 - ant ant - c801 - c803 - da801 - c826 - ic1(46/47) ic501(44/45) - c812 - l...

  • Page 24: 6 Installation Instructions

    24 kx-tg234sk/kx-tga470b 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 operating instructions. Note: you can download and refer to th...

  • Page 25: 8 Test Mode

    25 kx-tg234sk/kx-tga470b 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 . 2). Select "initial setting" using or then press or {>} . H/s key operation h/s lcd {^} {v} 3). Enter "...

  • Page 26

    26 kx-tg234sk/kx-tga470b 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 a read-only mode to confirm the contents. Careless rewr...

  • Page 27

    27 kx-tg234sk/kx-tga470b 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 . 2). Select "initial setting" using or then press or {>} . {^} {v} 3). Enter "7", "2", "6", "2", "7", "6", "6", "4...

  • Page 28

    28 kx-tg234sk/kx-tga470b 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 serious damage to the handset. Items address default data n...

  • Page 29: 9 Service Mode

    29 kx-tg234sk/kx-tga470b 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) *usage time is not cleared..

  • Page 30: 10 Troubleshooting Guide

    30 kx-tg234sk/kx-tga470b 10 troubleshooting guide 10.1. Troubleshooting flowchart cross reference: check power (p.31) check playback (p.35) check record (p.32) check battery charge (p.35) check link (p.36) check the rf part (p.38) check handset transmission (p.43) check handset reception (p.43) chec...

  • Page 31

    31 kx-tg234sk/kx-tga470b 10.1.1. Check power 10.1.1.1. Base unit cross reference: power supply circuit/reset circuit (p.12) note: bbic is ic501. (*1) refer to specifications (p.6) for part number and supply voltage of ac adaptor. (*2) refer to circuit board (base unit_main) (p.77). 10.1.1.2. Handset...

  • Page 32

    32 kx-tg234sk/kx-tga470b 10.1.2. Check record 10.1.2.1. Base unit not record incoming message cross reference: signal route (p.22) telephone line interface (p.14) parallel connection detect circuit/auto disconnect circuit (p.15) note: flash memory is ic601. Bbic is ic501. Check bell signal. Ok check...

  • Page 33

    33 kx-tg234sk/kx-tga470b 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 problem, try changing the auto disconnect activation t...

  • Page 34

    34 kx-tg234sk/kx-tga470b 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 a detection. 1) ~ 2) are same as (a). 3) press "5","1","1". 4) then enter the below last digit; 5) back to "standb...

  • Page 35

    35 kx-tg234sk/kx-tga470b 10.1.3. Check playback 10.1.3.1. Base unit cross reference: power supply circuit/reset circuit (p.12) note: flash memory is ic601. Bbic is ic1. (*1) refer to circuit board (base unit_main) (p.77). 10.1.4. Check battery charge 10.1.4.1. Base unit cross reference: charge circu...

  • Page 36

    36 kx-tg234sk/kx-tga470b 10.1.5. Check link 10.1.5.1. Base unit cross reference: power supply circuit/reset circuit (p.12) check the rf part (p.38) note: *1 how to adjust +3.0v: execute the command "vda" refer to things to do after replacing ic or x'tal (p.58) for base unit. *2 how to adjust the fre...

  • Page 37

    37 kx-tg234sk/kx-tga470b 10.1.5.2. Handset cross reference: power supply circuit/reset circuit (p.20) check the rf part (p.38) note: *1 how to adjust +3.0v: execute the command "vda" refer to things to do after replacing ic or x'tal (p.59) for handset. *2 how to adjust the frequency of x1: to see th...

  • Page 38

    38 kx-tg234sk/kx-tga470b 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 (*2) bu: base unit 1. Prepare regular hs(*1) and regular ...

  • Page 39

    39 kx-tg234sk/kx-tga470b 10.1.6.2. Rf check flowchart each item (1 ~ 5) of rf check flowchart corresponds to check table for rf part (p.40). Please refer to the each item. Note: (*1) refer to check link (p.36). Start link confirmation normal 1 control signal confirmation x'tal frequency confirmation...

  • Page 40

    40 kx-tg234sk/kx-tga470b 10.1.6.3. Check table for rf part note: (*1) refer to commands (handset) (p.54) (*2) refer to commands (base unit) (p.54) (*3) adjustment standard (base unit) (p.55) (*4) adjustment standard (handset) (p.57) no. Item bu (base unit) check hs (handset) check 1 link confirmatio...

  • Page 41

    41 kx-tg234sk/kx-tga470b 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 (base unit) (p.54). Item bu (base unit) check hs (handset...

  • Page 42

    42 kx-tg234sk/kx-tga470b 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 unit, re-register the handset. 1 handset: 2 base unit: ...

  • Page 43

    43 kx-tg234sk/kx-tga470b 10.1.9. Check handset transmission cross reference: signal route (p.22) 10.1.10. Check handset reception cross reference: signal route (p.22) note: when checking the rf part, refer to check the rf part (p.38). 10.1.11. Check caller id cross reference: telephone line interfac...

  • Page 44

    44 kx-tg234sk/kx-tga470b 11 disassembly and assembly instructions 11.1. Disassembly instructions 11.1.1. Base unit Ԙ remove the 5 screws to remove the cabinet cover. ԙ remove the solders. Ԛ remove the pararell wire to remove the main p.C. Board. Solders ԙ cabinet cover main p.C. Board pararell wire ...

  • Page 45

    45 kx-tg234sk/kx-tga470b ԛ remove the 2 screws to remove the jack holder. Ԝ remove the 4 screws to remove the operational p.C.B board. Jack holder Ԝ 4 screws operational p.C.B board ԛ 2 screws.

  • Page 46

    46 kx-tg234sk/kx-tga470b 11.1.2. Handset Ԙ remove the 2 screws. ԙ Ԛ likewise, open the other side of the cabinet. ԛ remove the cabinet cover by pushing it upward. Ԝ remove the solders and tape. Remove the 2 screws to remove the 2 charge terminals. ԝ Ԟ remove the screw to remove the main p. C. Board....

  • Page 47

    47 kx-tg234sk/kx-tga470b 11.1.3. Charger unit Ԙ remove the screw to remove the cabinet cover. ԙ remove the solders to remove the 2 charge terminals. Ԙ screw ԙ solders main p.C. Board 2 charge terminals.

  • Page 48

    48 kx-tg234sk/kx-tga470b 11.2. How to replace the base unit lcd Ԙ ԙ fit the heatseal of a new lcd. Heatweld with the tip of the soldering iron about 5 to 8 seconds (in case of 60w soldering iron). Operational p.C.B. 0.2mm 0.2mm if interval tolerance between center lines is less than 0.2 mm, it is o....

  • Page 49

    49 kx-tg234sk/kx-tga470b Ԛ attach the lcd and fix by hook a (two points). A.

  • Page 50

    50 kx-tg234sk/kx-tga470b 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 care to ensure that the foil on the p.C. Board is not d...

  • Page 51

    51 kx-tg234sk/kx-tga470b 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.30) 12.1. Equipment required • digital multi-meter (dmm): it must be able to measure voltage...

  • Page 52

    52 kx-tg234sk/kx-tga470b 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 depending on what your pc calls it. Dc power or batter...

  • Page 53

    53 kx-tg234sk/kx-tga470b 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 an ms-dos mode window. 3. At the dos prompt, type "d:" (...

  • Page 54

    54 kx-tg234sk/kx-tga470b 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 type “rdeeprom 00 00 ff”, and the data from address “00 ...

  • Page 55

    55 kx-tg234sk/kx-tga470b 12.3. Adjustment standard (base unit) when connecting the simulator equipment for checking, please refer to below. 12.3.1. Bottom view note: (*1) is referred to no.2 of check check table for rf part (p.40) (*2) is referred to power supply circuit/reset circuit (p.12) a pbf g...

  • Page 56

    56 kx-tg234sk/kx-tga470b 12.4. Adjustment standard (charger unit) when connecting the simulator equipment for checking, please refer to below. 12.4.1. Bottom view d1 r1 f1 r2 a pnlb2081z -ig pbf charge- charge+ 12 /2 w digital volt meter dc power dc 5.5 v (gnd).

  • Page 57

    57 kx-tg234sk/kx-tga470b 12.5. Adjustment standard (handset) when connecting the simulator equipment for checking, please refer to below. 12.5.1. Component view note: (*1) is referred to no.2 of check check table for rf part (p.40) (*2) is referred to power supply circuit/reset circuit (p.20) r3 c5 ...

  • Page 58

    58 kx-tg234sk/kx-tga470b 12.6. 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 if it is not executed. 12.6.1. How to download the dat...

  • Page 59

    59 kx-tg234sk/kx-tga470b 12.6.1.2. Handset first, operate the pc setting according to the setting method of jig (p.51). Then download the appropriate data according to the following procedures. Note: (*2) xxx_yyy: revision number “xxx” and “yyy” vary depending on the country version. You can find th...

  • Page 60

    60 kx-tg234sk/kx-tga470b 12.7. 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 61: 13 Miscellaneous

    61 kx-tg234sk/kx-tga470b 13 miscellaneous 13.1. How to replace the llp (leadless leadframe package) ic note: this description is only applied on the model with shield case. 13.1.1. Preparation • pbf (: pb free) solder • soldering iron tip temperature of 700 °f ± 20 °f (370 °c ± 10 °c) note: we recom...

  • Page 62

    62 kx-tg234sk/kx-tga470b 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 ic. Note: • when placing the ic, the positioning shoul...

  • Page 63

    63 kx-tg234sk/kx-tga470b 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 remove the ics that have more than 100 pins. 13.2.1. Pr...

  • Page 64

    64 kx-tg234sk/kx-tga470b 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 package ic. 3. Solder the pins, sliding the soldering iron ...

  • Page 65

    65 kx-tg234sk/kx-tga470b 13.3. Terminal guide of the ics, transistors and diodes 13.3.1. Base unit 13.3.2. Handset 13.3.3. Charger b c e c b e 2sc6054jsl, b1abdm000001 drc9113z0l, 2sa1576s b1gbcfyy0020 1 4 8 5 pnwi1tg4741h pnwi2tg4741h c2hbcy000107 dsc7003s0l cathode anode b0eckm000008 pqvdmd5s cath...

  • Page 66

    66 kx-tg234sk/kx-tga470b memo.

  • Page 67: 14 Schematic Diagram

    67 kx-tg234sk/kx-tga470b 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 may be modified at any time with the development of ne...

  • Page 68

    68 kx-tg234sk/kx-tga470b 14.2. Schematic diagram (base unit_main) nc: no components jtag_tdo urx jtag_tms utx jtag_tdi jtag_tdo jtag_tck jtag_rtck jtag_tdi jtag_tms jtag_rtck jtag_tck bell charge_det lcd_blt msg_led ans_led sp_led lcd_rst keys_e keys_c keyin1 keyin2 keyin3 keys_d keyin4 keyin5 lcd_c...

  • Page 69

    69 kx-tg234sk/kx-tga470b kx-tg234 schematic diagram (base unit_main) nc: no components urx utx eep_wp spi_cs eep_sda 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 eep_scl eep_sda keyin3 keyin2 keyin1 k...

  • Page 70

    70 kx-tg234sk/kx-tga470b 14.3. Schematic diagram (base unit_operation) 1 1 2 8 1 2 5 1 2 2 1 2 9 1 2 flash 1 2 6 1 2 redial/pause 1 2 3 1 2 0 1 2 * 1 2 7 1 2 4 1 2 # 1 2 ans 1 2 stop 1 2 erase/mute 1 2 hold/conf 1 2 sp 1 2 msg2 1 2 msg1 1 2 skip 1 2 down 1 2 rpt 1 2 up 1 2 locat/int 1 2 pcb ans_led ...

  • Page 71

    71 kx-tg234sk/kx-tga470b memo.

  • Page 72

    72 kx-tg234sk/kx-tga470b 14.4. Schematic diagram (handset_main) nc: no components (1) (2) (3) (4) (5) (7) (6) (9) (10) (11) (12) (8) stb_d kin_4 chg_det chg_ctrl chg_cur stb_e stb_c key_le d eep_wp 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 ki...

  • Page 73

    73 kx-tg234sk/kx-tga470b kx-tga470 schematic diagram (handset_main) nc: no components (1) (2) (3) (4) (5) (7) (6) (9) (10) (11) (12) (8) rx_rf tx_rf handset rx handset tx sp-phone tx sp-phone rx headset_det c71 nc c28 nc c97 d10p c96 d10p d3 nc d4 nc c12 10u c42 k1000p gnd gnd r73 33 r74 33 rxon rxp...

  • Page 74

    74 kx-tg234sk/kx-tga470b 14.5. Schematic diagram (handset_led) led kx-tga470 schematic diagram (handset_led).

  • Page 75

    75 kx-tg234sk/kx-tga470b 14.6. Schematic diagram (charger unit) j1 2 1 g a k tp1 tp2 f1 r1 1 (0.5w) r2 d1 1 (0.5w) schematic diagram (charger unit) !.

  • Page 76

    76 kx-tg234sk/kx-tga470b memo.

  • Page 77: 15 Printed Circuit Board

    77 kx-tg234sk/kx-tga470b 15 printed circuit board 15.1. Circuit board (base unit_main) 15.1.1. Component view ant2 wbx02 wbx01 ant1 brn tel ylw gry pur org org sp dc blu blu chg 1 kx-tg234 circuit board (base unit_main (component view)) a kx-tg474x/473xh tg474x pnlb2013z pbf -pa c168 c161 c167 c142 ...

  • Page 78

    78 kx-tg234sk/kx-tga470b 15.1.2. Bottom view kx-tg234 circuit board (base unit_main (bottom view)) a pbf gry pur org sp charge+ chg charge- dc dcp blu org blu brn tel ylw kx-tg474x/473xh pnlb2013z -pa c476 c521 c133 c611 c151 c186 c185 c662 c664 l664 l665 c665 c663 c669 c511 ra452 c479 c113 c111 c18...

  • Page 79

    79 kx-tg234sk/kx-tga470b 15.2. Circuit board (base unit_operation) # rpt msg1 msg3 msg2 msg4 stop erase/mute ans locat/int hold/conf redial/pause sp mic- mic+ mic down skip flash up led915 0 8 7 4 1 5 6 2 3 9 kx-tg234 circuit board (base unit_operation (component view)) tg774xh tg474xh a pnlb2050z p...

  • Page 80

    80 kx-tg234sk/kx-tga470b memo.

  • Page 81

    81 kx-tg234sk/kx-tga470b 15.3. Circuit board (handset_main) 15.3.1. Component view r3 c5 chg+ chg (+) chg (-) bat+ c28 c6 c15 l10 c83 c32 l7 l8 l1 spm c72 blue orange mic+ mic- spp r80 c87 r45 bat- a chg- c10 c82 cn4 c84 l75 c85 d13 d14 c73 l4 l5 c37 q6 r27 r28 c12 ra1 ra3 ra2 sp-phone chg_det vbat ...

  • Page 82

    82 kx-tg234sk/kx-tga470b 15.3.2. Bottom view v ol_up cn3_c v ol_d w led7 led1 talk 1 4 7 8 9 0 a # 5 6 2 3 sp flash off led3 led5 led6 mic led21 led20 led4 led2 led9 led9 soft_a soft_b up down left right soft_c pnlb2012z -pa kx-tga470 circuit board (handset_main (bottom view)).

  • Page 83

    83 kx-tg234sk/kx-tga470b 15.4. Circuit board (handset_led) a kx-tga470 circuit board (handset_led (component view)) pnlb1964z pbf -ig.

  • Page 84

    84 kx-tg234sk/kx-tga470b 15.5. Circuit board (charger unit) 15.5.1. Component view 15.5.2. Bottom view j1 circuit board (charger unit (component view)) pnlb2081z -ig a circuit board (charger unit (bottom view)) pnlb2081z -ig d1 r1 f1 r2 a pbf.

  • Page 85

    85 kx-tg234sk/kx-tga470b 16 exploded view and replacement parts list 16.1. Cabinet and electrical parts (base unit) note: (*1) this cable is fixed by welding. Refer to how to replace the base unit lcd (p.48). E2 19 20 17 16 pcb1 pcb2 mic1 10 7 12 e1 (*1) e3 8 9 11 18 4 2 3 5 a a 14 15 a a a 1 6 13 r...

  • Page 86

    86 kx-tg234sk/kx-tga470b 16.2. Cabinet and electrical parts (handset) note: (*1) this cable is fixed by welding. Refer to how to replace the handset lcd (p.50). (*2) the rechargeable ni-mh battery hhr-4dpa is available through sales route of panasonic. (*3) attach the spacer (no. 121) to the exact l...

  • Page 87

    87 kx-tg234sk/kx-tga470b 16.3. Cabinet and electrical parts (charger unit) b 200 200-1 200-3 201 200-4 200-2 pcb200 ref.No. φ 2 ×8 mm b figure.

  • Page 88

    88 kx-tg234sk/kx-tga470b 16.4. Accessories a1 a2 a3 a4 a5.

  • Page 89

    89 kx-tg234sk/kx-tga470b 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 specific period of time. This period of time depends on the ...

  • Page 90

    90 kx-tg234sk/kx-tga470b 16.5.1.3. Operational p.C. Board parts r145 d0ga222ja021 2.2k r151 d0ga104ja021 100k r152 erj2gej474x 470k s r160 erj3geyj911 910 r161 d0gb104ja057 100k r162 d0gb473ja057 47k r163 erj14yj120u 12 r164 d0gb272ja057 2.7k r165 erj3geyj273 27k s r167 d0gg270ja007 27 r171 d0ga220j...

  • Page 91

    91 kx-tg234sk/kx-tga470b 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 handset may differ from the included handset. (*2) when ...

  • Page 92

    92 kx-tg234sk/kx-tga470b 16.5.2.3. Led board parts 16.5.3. Charger unit 16.5.3.1. Cabinet and electrical parts 16.5.3.2. Main p.C. Board parts c1 eee0ja221wp 220 c2 eee0ja221wp 220 c3 eee0ja221wp 220 c4 ecue1h390jcq 39p c5 ecue1a104kbq 0.1 c6 ecue1a104kbq 0.1 c9 ecue1h390jcq 39p c10 ecue1h390jcq 39p...

  • Page 93

    93 kx-tg234sk/kx-tga470b 16.5.4. Accessories note: (*1) you can download and refer to the operating instructions (instruction book) on tsn server. 16.5.5. Screws 16.5.6. Fixtures and tools note: (*1) see equipment required (p.51), and the setting method of jig (p.51) (*2) when replacing the handset ...

  • Page 94: Telephone Equipment

    © panasonic system networks co., ltd. 2013 unauthorized copying and distribution is a violation of law. Order no. Km41309640se f13 telephone equipment model no. Kx-tg234sk kx-tga470b digital cordless answering system b: black version (for u.S.A.) table of contents page 1 replacement parts list------...

  • Page 95: 1 Replacement Parts List

    2 kx-tg234sk/kx-tga470b 1 replacement parts list 1.1. Reference chart 1.2. Original and new parts comparison lists nm kxtg234sk kxtga470b reason for change *the following items (1-8) indicate the reason for change. See the “notes” column for each part in original and new parts comparison lists. 1. I...

  • Page 96: Telephone Equipment

    © panasonic system networks co., ltd. 2013 unauthorized copying and distribution is a violation of law. Order no. Km41311797se f13 telephone equipment model no. Kx-tg234sk kx-tga470b digital cordless answering system b: black version (for u.S.A.) table of contents page 1 replacement parts list------...

  • Page 97: 1 Replacement Parts List

    2 kx-tg234sk/kx-tga470b 1 replacement parts list 1.1. Reference chart 1.2. Original and new parts comparison lists nm kxtg234sk kxtga470b reason for change *the following items (1-8) indicate the reason for change. See the “notes” column for each part in original and new parts comparison lists. 1. I...

  • Page 98: Telephone Equipment

    © panasonic system networks co., ltd. 2014 unauthorized copying and distribution is a violation of law. Order no. Km41401274se f13 telephone equipment model no. Kx-tg234sk kx-tga470b digital cordless answering system b: black version (for u.S.A.) table of contents page 1 replacement parts list------...

  • Page 99: 1 Replacement Parts List

    2 kx-tg234sk/kx-tga470b 1 replacement parts list 1.1. Reference chart 1.2. Original and new parts comparison lists oy kxtg234sk kxtga470b reason for change *the following items (1-8) indicate the reason for change. See the “notes” column for each part in original and new parts comparison lists. 1. I...