Panasonic KX-TS2388RUB Service Manual
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Panasonic KX-TS2388RUB Service Manual

Panasonic KX-TS2388RUB Service Manual

Integrated telephone equipment
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Telephone Equipment
KX-TS2388RUB
Model No.
KX-TS2388RUW
KX-TS2388CAB
KX-TS2388CAW
KX-TS2388UAB
KX-TS2388UAW
Integrated Telephone System
B: Black Version
W: White Version
(for Russia, Central Asia and Ukraine)
© Panasonic System Networks Co., Ltd. 2010
Unauthorized copying and distribution is a violation
of law.
ORDER NO. KM41010283CE

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  • Page 1 Telephone Equipment KX-TS2388RUB Model No. KX-TS2388RUW KX-TS2388CAB KX-TS2388CAW KX-TS2388UAB KX-TS2388UAW Integrated Telephone System B: Black Version W: White Version (for Russia, Central Asia and Ukraine) © Panasonic System Networks Co., Ltd. 2010 Unauthorized copying and distribution is a violation of law.
  • Page 2 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 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. Products powered by electricity should be serviced or repaired only by experienced professional technicians.

  • Page 3: Table Of Contents

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions----------------------------------------------- 4 1.1. For Service Technicians --------------------------------- 4 2 Warning -------------------------------------------------------------- 4 2.1. Battery Caution--------------------------------------------- 4 2.2. About Lead Free Solder (Pbf: Pb free)--------------- 4 2.3. Discarding of P. C. Board-------------------------------- 5...

  • Page 4: Safety Precautions

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 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 pre- vent fires, injury or electric shock, which can be caused by improper repair work.

  • Page 5: Discarding Of P. C. Board

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 2.2.1. Suggested PbF Solder There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper (Sn+Ag+Cu), you can also use Tin and Copper (Sn+Cu) or Tin, Zinc, and Bismuth (Sn+Zn+Bi). Please check the manufac turer's specific instructions for the melting points of their products and any precautions for using their product with other materi- als.

  • Page 6: Specifications

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 3 Specifications Power Source: From telephone line From 3 AA (LR6, R6, UM-3) batteries Memory Capacity: 50 Caller ID memory, 50 Directory memory. Redial: The unit redials the last dialed number Speaker Unit: Unit: 5.7cm (2.5") PM magnetic type 32 Handset: 3 cm (1 ") PM dynamic type 150...

  • Page 7: Technical Descriptions

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 4 Technical Descriptions 4.1. Block Diagram...

  • Page 8: Circuit Operation

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 4.2. Circuit Operation 4.2.1. Bell Detector Circuit When the bell signal is input from LINE to T/R (when the telephone rings), the signal is output at the speaker via the following path : T/R  R1/C1  D1/LED1 (small PCB)  D3/D4  IC1 (pin8)  IC1 (pin5)  PC1  C5  SW2 (R7/R8/R9) T1  Speaker 4.2.2.
  • Page 9 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 4.2.4. Speakerphone Circuit 4.2.4.1. Function The circuit controls the automatic switching of the transmitted and received signals, to and from the telephone line, when the unit is used in the hands -free mode. 4.2.4.2. Circuit Operation The speakerphone can only provide a one-way communication path.
  • Page 10 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 4.2.5. Initializing Circuit 4.2.5.1. Function This circuit is used to initialize the CPU when the batteries are installed. 4.2.5.2. Circuit Operation When the batteries is inserted into the unit, then the voltage is regulated by IC302 and power is supplied to the CPU. The set can operate in the circuit voltage diagram.
  • Page 11 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 4.2.6. Caller ID Detect Circuit 4.2.6.1. Function (FSK Signal) The caller ID is a changeable 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 operation of this circuit assumes that a caller ID service contract has been entered for the circuit being used.

  • Page 12: Location Of Controls And Components

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 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 the Operating Instructions (Instruction book) on TSN Server.

  • Page 13: Troubleshooting Guide

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 8 Troubleshooting Guide 8.1. Service Hints SYMPTOM CURE Dead. Check IC801, X1. Can't hear the voice from handset. Check Q401, Q402, Q403. No voice transmit. Check Q422, Q107. Can't tone dial. Check IC801 (91), R481, R485. Can't pulse dial.

  • Page 14: Tone Dialing Problems

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 8.3. Tone Dialing Problems Does the DTMF signal Can the DTMF sound Check IC801 and X1. appear at Pin91 of IC801? be monitored ? Does the DTMF signal Check C485, R487, R490, appear at base of Q422? C415, L411, L409 and Q403.

  • Page 15: Disassembly And Assembly Instructions

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 9 Disassembly and Assembly Instructions 9.1. Disassembly Instructions 1 Press the catches (1) and rotate the stand in the direction (2) to remove the Stand. Note: When the Stand is in Low position, the screws can be taken out just as it is.
  • Page 16 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 4 Rem ove Main P.C. Board, then unhook the LED P.C. Board and Tel Line Jack. Main P.C. Board LED P.C. Board Speaker Tel Line Jack 5 Remove the 3 screws to remove the speaker. 3 screws Speaker 6 Remove the 4 screws to remove the Operational P.C. Board.

  • Page 17: Assembly Instruction

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 9.2. Assembly Instruction 9.2.1. How to Replace the Base Unit LCD Note: • Make sure to cut the length of the rubber of the soldering iron to become 23mm to 25mm. • Preheat the soldering iron for 10 minutes for the Rubber of Soldering Iron to reached around 180~200C.
  • Page 18 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW Vertical Interval Tolerance 0.2 mm Fit the heatseal of the new LCD. Horizontal Interval Tolerance New LCD 0.2 mm If interval tolerance between center lines is less than 0.2 mm, it is o.k. (Inclined) (Vertical interval tolerance is more than 0.2 mm.) (Horizontal interval tolerance is more than 0.2 mm.)
  • Page 19 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW Heatweld with the tip of the soldering iron for 10 seconds each position (in case of 60W soldering iron) with 10kg pressure applied 9 times on position (A)~(I), as shown below. Tip of Soldering Iron (Part No. PQZZ430PIR) Rubber of Soldering Iron (Part No.
  • Page 20 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 9.2.2. How to Install the Headset Cover 90° Before install, bend the tab towards adhesive side. Peel off the separator from the headset cover. Cover Sheet 90° Separator Install the headset cover sheet. Cover Sheet Then, install the headset cover rubber to lower cabinet as shown.

  • Page 21: Miscellaneous

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 10 Miscellaneous 10.1. IC Block diagram 10.1.1. IC 801 ROSC XI/XO X32I/X32O IOA [7:0] 32768Hz XTAL OSC Time Base Gen. 31768Hz IOB [7:0] & 8-bit timer x 1 32 IO Ports RC-OSC/XTAL OSC IOC [7:0] 16-bit timer x 1 System Clock Gen.
  • Page 22 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 10.1.2. RINGER IC (IC1) Vcc 1 POWER SUPPLY RSL 2 WITH HYSTERISIS LFI 3 LOW FREQ HIGH FREQ LFO 4 Pin descriptions Pin No. Pin name Name Function This is the power supply pin for the lC. It is connected to the (...
  • Page 23 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 10.1.3. EEPROM (IC851) Sense amps Dout & ACK Shift resistor (Open drain) Word address Column decorders buffers Start/Stop Memory array XDEC logic 128 X 128 Control logic Data in storage High voltage generator & Stage counters Timing control &...
  • Page 24 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 10.1.4. Speakerphone IC Data (IC601) TRANSMIT CHANNEL TRANSMIT ATTENUATOR TRANSMIT LEVEL DETECTOR TRANSMIT SIGNAL ATTENUATOR RECEIVE NOISE CONTROL COMPARATOR DETECTOR RECEIVE PEAK LEVEL LIMITER DETECTOR RECEIVE ATTENUATOR RECEIVE CHANNEL SPEAKER REGULATOR SPEAKERPHONE IC SYSTEM MC34018 Name Description A resistor to ground provides a reference current for the transmit and receive attenuators.

  • Page 25: How To Replace The Flat Package Ic

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 10.2. 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.
  • Page 26 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 10.2.3. 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.

  • Page 27: Terminal Guide Of The Ics, Transistors And Diodes

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 10.3. Terminal Guide of the ICs, Transistors and Diodes PQVIPS3238NT, C0ZBZ0001747 C2CBYY000895 C1CB00001673 C0DBZGC00067 C1CB00002903, C0ABBA000025, UNR5213J0L, B1ABDF000026, PQVTDTC144TU, PQVINJU7014R, PNWITS2388RU, PQVTBF822T7, B1GBJCFJ0003,B1GBJCJJ0003, PNWITS2388CA, PNWITS2388UA UNR5113J0L,2SD1819KSL,2SB1218KSL B1AAKD000013 2SA1776P PQVTFMG2T148 PQVIPS3327UT Cathode Cathode Anode Cathode Anode Anode Cathode Anode MA111,...

  • Page 28: Schematic Diagram

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 11 Schematic Diagram 11.1. For Schematic Diagram 1. DC voltage measurements are takens with electronic voltmeter from negative terminal. 2. This schematic diagram may be modified at any time with the development of new technology.
  • Page 29 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW Memo...

  • Page 30: Schematic Diagram (Main)

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 11.2. Schematic Diagram (Main) *C603 IC601 0.033 u R611 R606 C620 0.033 u R607 R612 1.8 k C609 0.1 u TX I C615 22u 16V R605 2.2 M R602 C606 R613 100k C610 2.7 K 0.068 u C619 4.7 u 16V R608 4.7 k...
  • Page 31 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW RINGER DETECT *SW2 1.8k (0.5W ) 1u 50 0.01 u *SW1 (10) Hi-impedance L651 circuit *R657 *C1 1u *JP 1 (11) *Q652 R660 WHITE (12) *R653 WHITE CN3-1 *R123 *Q109 CN3-2 *CN3- 1 JJ10 1 *Q653 270k (13) (14)

  • Page 32: Schematic Diagram (Operation)

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 11.3. Schematic Diagram (Operation) *R858 *C858 *R859 *C857 0.1 U NC18 NC17 NC16 STB4 SEG 4 SEG 4 RINGIN STB5 R875 SEG 5 SEG 5 TIPI N STB6 SEG 6 SEG 6 DTMFO STB7 SEG 7 SEG 7 AVSS...
  • Page 33 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW TP30 RING TP29 TI P TP28 TP27 WAKEUP (10) TP26 TXMUT E (11) TP25 (12) (13) TP24 MUSIC / DTMF (14) TP23 BEEP / DRING TP22 MIC + IC831 TP21 MIC - (15) (16) (17) TP20 CIDW (18) TP19...
  • Page 34 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW Memo...

  • Page 35: Printed Circuit Board

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 12 Printed Circuit Board 12.1. Circuit Board (Main) 12.1.1. Component View WHITE SA101 CN3-2 FLT1 POS101 JJ101 WHITE C101 CN3-1 C102 C180 Q101 D102 Q181 JP101 D105 C114 PC101 Q105 C106 JP10 D103 C652 R119 Q107 C111 SW101 Q654...
  • Page 36 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 12.1.2. Bottom View PNLB1814Z TP101 TP102 R102 SA102 R101 D101 R103 R106 R183 R184 Q102 C103 R128 C100 R127 C104 C115 R108 Q109 R182 D108 R123 Q110 R107 R181 Q104 D112 R124 Q103 R132 R654 R125 R111 Q111 C116...

  • Page 37: Circuit Board (Operation)

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 12.2. Circuit Board (Operation) 12.2.1. Component View PNLB1815Z KX-TS2388 CIRCUIT BOARD (Base Unit_Operation (Component View))
  • Page 38 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 12.2.2. Bottom View R801JP801 TP862 C802 IC801 C803 D885 C805 D886 R858 IC871 R871 R860 C858 C857 R872 C856 R876 R813 R857 R859 R832 TP831 Q833 R833 R831 TP855 IC831 R863 JP802 PROG/EXIT CLEAR AUTO/LOWER DIALLOCK/HOLD REDIAL PAUSE STB7...

  • Page 39: Exploded View And Replacement Parts List

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 13 Exploded View and Replacement Parts List 13.1. Cabinet and Electrical Parts PCB2 PCB1 MIC1 17-1 Ref.No. Figure 20-1...

  • Page 40: Accessories

    KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 13.2. Accessories...

  • Page 41: Replacement Part List

    SPEAKER PNBH1011Z2 PUSH BUTTON, HOOK (for ABS-HB Components identified by the mark indicates special KX-TS2388RUB) (for KX- characteristics important for safety. When replacing any TS2388CAB) (for KX- TS2388UAB) of these components, only use specified manufacture's PNBH1011Z1 PUSH BUTTON, HOOK (for ABS-HB parts.
  • Page 42 PQJC314Y BATTERY TERMINAL, BAT- D101 B0EDER000009 DIODE(SI) TERY CONTACT(-)(+) D102 MA4180 DIODE(SI) PNYL1005Z2 STAND, WALLMOUNT (for PS-HB D103 MA4051 DIODE(SI) KX-TS2388RUB) (for KX- D105 1SS133 DIODE(SI) TS2388CAB) (for KX- D106 MA4180 DIODE(SI) TS2388UAB) D108 MA111 DIODE(SI) PNYL1005Z1 STAND, WALLMOUNT (for...
  • Page 43 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks R202 ERJ3GEYJ124 120k R606 ERJ3GEYJ303 R203 ERJ3GEYJ103 R607 ERJ3GEYJ683 R204 ERJ3GEYJ394 390k R608 ERJ3GEYJ472 4.7k R205 ERJ3GEYJ562 5.6k R609 ERJ3GEYJ275 2.7M...
  • Page 44 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks C432 ECUV1H153KBV 0.015 IC831 PNWITS2388RU IC (EEPROM) (for KX- TS2388RU) C481 ECUV1H102KBV 0.001 IC831 PNWITS2388CA IC (EEPROM) (for KX- C482 ECUV1H102KBV 0.001...
  • Page 45 KX-TS2388RUB/KX-TS2388RUW/KX-TS2388CAB/KX-TS2388CAW/KX-TS2388UAB/KX-TS2388UAW 13.3.2. Accessories Note: You can download and refer to the Operating Instructions (Instruction Book) on TSN Server. Safety Ref. Part No. Part Name & Description Remarks PQJXF0201Z HANDLE/HANDSET (for KX- TS2388RUB) (for KX- TS2388CAB) (for KX- TS2388UAB) PQJXF0202Z HANDLE/HANDSET (for KX-...

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