Toshiba FT-8800 Service Manual
  1. Manuals
  2. Brands
  3. Toshiba Manuals
  4. Cordless Telephone
  5. FT-8800
  6. Service manual
Toshiba FT-8800 Service Manual

Toshiba FT-8800 Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

FILE NO. 2B0-200007
SERVICE MANUAL
CORDLESS TELEPHONE
FT-8800
PUBLISHED IN JAPAN, Sep., 2000

Advertisement

Table of Contents
loading

Related Manuals for Toshiba FT-8800

Summary of Contents for Toshiba FT-8800

  • Page 1 FILE NO. 2B0-200007 SERVICE MANUAL CORDLESS TELEPHONE FT-8800 PUBLISHED IN JAPAN, Sep., 2000...

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ......................1 OPERATING CONTROLS ......................2 ALIGNMENT PROCEDURE ......................3 BLOCK DIAGRAMS ........................7 SCHEMATIC DIAGRAMS ......................9 TROUBLESHOOTING HINTS ....................13 IC AND TRANSISTOR VOLTAGE CHART ................20 SEMICONDUCTOR LEAD IDENTIFICATION ................25 ELECTRICAL PARTS LOCATION ..................... 27 WIRING DIAGRAMS .........................

  • Page 3: Operating Controls

    Charging contact Rechargeable Battery Pack(back) BASE UNIT CONTROLS AND FUNCTIONS PULSE/TONE Switch DC IN 9V Jack TEL LINE Jack DIGITAL CALLER-ID CORDLESS TELEPHONE FT-8800 Antenna Cradle IN USE IN USE/CHARGE LED CHARGE PAGE PAGE Button 900MHz COMPANDOR NOISE REDUCTION Charging Contact...

  • Page 4: Alignment Procedure

    ALIGNMENT PROCEDURE Base Unit Transmitter Section BASE Unit AF GEN. Test Point Power Connections Meter DC IN TEL Line 1kHz -15dBm 9V Jack Jack Test Point Frequency Counter AC 120V Adapter 60Hz Deviation Mater Preset a) Connect the base RF unit to the base main unit. b) Set the “TONE / PULSE”...
  • Page 5 Receiver Section Connections BASE Unit AC Voltmeter RF SG Dummy Load (600-ohm) TEL Line Test Point Jack DC Voltmeter DC IN 9V Jack Terminal AC 120V 60Hz Adapter Preset a) Connect the base RF unit to the base main unit. b) Set the “TONE/PULSE”...
  • Page 6 Handset Unit Transmitter Section Connection HANDSET Unit AF GEN. Test Point Power Meter J603 Battery 1kHz 9mV MIC+Pin Connector Test Point Frequency Counter DC Power Supply Deviation Mater DC 3.8V Preset a) Connect the handseet RF unit to the handset main unit. b) Connect DC power supply to battery connector on the handset unit.
  • Page 7 Receiver Section Connections HANDSET Unit AC Voltmeter RF SG Dummy Load (150-ohm) Connector Test Point DC Power Supply J603 DC Voltmeter Battery Terminal Connector DC 3.8V Preset a) Connect the handset RF unit to the handset main unit. b) Connect DC power supply to battery connector on the handset unit. c) Turn the DC power supply ON while pressing “...

  • Page 8: Block Diagrams

    BLOCK DIAGRAMS Base Unit...
  • Page 9 Handset...

  • Page 10: Schematic Diagrams

    SCHEMATIC DIAGRAMS Base Unit B301 RF MODULE...
  • Page 11 Handset B501 RF MODULE...

  • Page 12: Troubleshooting Hints

    TROUBLESHOOTING HINTS 1. The bell does not ring. See 2. The bell does not ring When the PAGE SW of the base is pressed, does the & page does not ring. ringer on the handset ring? When the TEL SG is joined Check IC4 and TEL network with the base to make bell circuit.
  • Page 13 2. The bell does not ring & page does not ring. Can the base and handset be See 3. The base and handset connected? cannot be connected. Press handset DIAL key When the key of the handset is Check IC603. while in TALK MODE.
  • Page 14 3. The base and handset cannot be connected. Check whether the base Check IC4 and its is able to set in the test peripheral circuit. mode 1. Check the TX POWER Check base RF unit. and the TX FREQUENCY on the base unit. Press “PAGE”...
  • Page 15 Press “3” key, check Check whether there is a C h e c k R 6 3 5 , R 6 3 6 , whether deviation of the 250 Hz data waveform at R 6 3 4 , R 6 3 2 , R 6 1 9 , TX data is app.
  • Page 16 4. Cannot make a phone call (pulse). Can the base and handset See 3. The base and handset be connected? cannot be connected. While in TALK MODE, press Check IC2. dial key of the handset. Check whether square waveform from pin 1 of IC2 is fed.

  • Page 17: Voice Cannot Be Transmitted To Other Party (Outgoing Call)

    6. Voice cannot be transmitted to other party (outgoing call). Can the base and handset be See 3. The base and handset connected? cannot be connected. The 1 kHz, 9.0mV sine Check Q604 and its wavefor m i s a p p l i e d t o peripheral circuit.
  • Page 18 7. The voice of the caller cannot be heard (incoming call). Can the base and handset be See 3. The base and handset connected? cannot be connected. The 1 kHz, 77.5mV sine Check the base TEL-line waveform is applied to TEL- circuit and REPLAY control line of the base, can the 1 kHz circuit.

  • Page 19: Ic And Transistor Voltage Chart

    IC AND TRANSISTOR VOLTAGE CHART Base Unit Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE 1.7V DC 1.7V DC 2.6V DC 2.6V DC 1.7V DC 1.7V DC 0-3.2V DC 1.7V DC 1.7V DC 3.2V DC 3.2V DC 0.7V DC 1.7V DC...
  • Page 20 Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE 2.6-3.8V 2.6-3.8V SINE WAVE 3.2V DC 3.2V DC 3.4-4.2V 3.4-4.2V SINE WAVE 1.2V DC 1.2V DC 2.6V DC 2.4-3.0V PULSE 3.2V DC 3.2V DC 2.8V DC 2.8V DC 2.8V DC 2.5-3.0V...
  • Page 21 Unit[V] Ref. No. PIN STBY TALK NOTE 9V DC 0.8V 3.2V DC 3.2V DC 5.2V DC 5.2V DC 3.8V DC 3.8V DC 2.6V DC 2.6V DC 2.6V DC 2.5V DC 2.2V DC...
  • Page 22 Handset Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE 0-2.8V 1.9V DC 0V DC 0V DC 0-2.8V 1.9V DC 1.4-3.0V 3.0V DC -0.2-2.6V 1.6V DC 0V DC 0V DC 0.4-0.8V 0.6V DC 3.0V DC 3.0V DC 0.4-1.5V 1.5V DC...
  • Page 23 Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE 0V DC 0V DC 0-0.4V 1.0V DC 3.0V DC 3.0V DC Q601 0-2.0V 1.9V DC IC603 3.0V DC 3.0V DC 0-1.0V 0.3V DC 3.0V DC 3.0V DC 0V DC 0.7V DC 3.0V DC...

  • Page 24: Semiconductor Lead Identification

    SEMICONDUCTOR LEAD IDENTIFICATION Base Unit Q1 : 2SC2714 D6 : MVR3338ST-922 D2 : HZK7C D1/D4/D5/D9/D10 Q2/Q4/Q6/Q9 : 2SC1623 /D12/D15/D16/D17 : 1N4148 Q3/Q10 : 2SC2712 D3 : HZ33-2 Q16 : 2SA812(M) D11 : HZ6B2 Cathode Anode D13 : HZ4B1 Anode B : Base Cathode E : Emitter Anode...
  • Page 25 Handset D615 : RB420D D602/D604 D612/D613/D614 : D610/D611 : 1SS226 /D606/D607 : RLS4148 EMPG4868K-8C0 Cathode Cathode / Anode D608/D609 : HZK6C Anode Cathode Anode (open) Anode Cathode Cathode Anode IC602 IC601 Q600/Q601/Q602/Q603/Q604 TK11130SCL LA8634VU /Q610/Q611/Q616/Q617 : 2SC1623 Q609/Q613 : 2SA812(M) Q612 : 2SC2714 Q614 : 2SC2712 B : Base...

  • Page 26: Electrical Parts Location

    ELECTRICAL PARTS LOCATION Base Unit Main PCB...
  • Page 27 Handset Main PCB...

  • Page 28: Wiring Diagrams

    WIRING DIAGRAMS Base Unit...
  • Page 29 Handset...

  • Page 30: Exploded View And Mechanical Parts List

    EXPLODED VIEWS AND MECHANICAL PARTS LIST Base Unit RF MODULE (BASE) MAIN PCB ASSY ANTENNA...
  • Page 31 Base Unit LOC. REF. PART NO. DESCRIPTION RC009453 GNBZ447684A BUTTON, PUSH RC009447 GCAS347682Z CASE, BOTTOM RC009525 GCAS347692Z CASE, TOP RC009325 HTML446079Z CHARGE TERMINAL C5191(PBP) RC009327 LFUT441122Z FOOT RC009450 GCAS447683Z HOOK RC009531 PLBB448213A LABEL, BARCODE RC009534 PLBZ448214Z LABEL, INDICATION RC009535 PLBZ448215Z LABEL, TA POLYESTER RC009313...
  • Page 32 Handset RF MODULE (HANDSET) MAIN PCB ASSY...
  • Page 33 Handset LOC. REF. PART NO. DESCRIPTION RC008346 RBLD442400Z BLIND RC009366 RBLD447533Z BLIND RC009530 GNBZ447699Z BUTTON, FUNCTION RC009528 GNBZ447696Z BUTTON, FUNCTION (COMP) RC009526 GCAS347694Z CASE, FRONT RC009449 GCAS347686A CASE, REAR RC009326 HTML446093Z CHARGE TERMINAL C2680(BSP) RC008703 GCAS457897Z COVER ELASTOMER RC009451 GCAS447687A COVER, BATTERY RC008348 RCUN442433Z...

  • Page 34: Parts List

    PARTS LIST PRODUCT SAFETY NOTE : Products marked with a have special characteristics important to safety. Before replacing any of these components, read carefully the product safety notice of this service manual. Don't degrade the safety of the product through important servicing. Symbol Symbol 30 -20+80 0+100...
  • Page 35 LOC. REF. PART NO. DESCRIPTION RC005202 BCML311045Z CERAMIC M/L (1608) 0.1UF 16V K B RC004369 BCDR811096Z ELECTROLYTIC 1UF 50V M C-292 RC002234 BCXT814735Z CERAMIC M/L (2125) 0.047UF 50V K B RC008485 BCMM813914Z CERAMIC M/L (1608) 390PF 50V J CH RC009372 BCML511835Z CERAMIC M/L (1608) 0.018UF 25V K B...
  • Page 36 LOC. REF. PART NO. DESCRIPTION RC005216 BCMM813304Z CERAMIC M/L (1608) 33PF 50V J CH RC000744 BCKB811025Z CERAMIC 0.001UF 50V K YB(B) RC005202 BCML311045Z CERAMIC M/L (1608) 0.1UF 16V K B RC005202 BCML311045Z CERAMIC M/L (1608) 0.1UF 16V K B RC008146 BCML816825Z CERAMIC M/L (1608) 0.0068UF 50V K B...
  • Page 37 LOC. REF. PART NO. DESCRIPTION C643 RC005223 BCMS812091Z CERAMIC M/L (1608) 2PF 50V C CK C644 RC005401 BCXT111055Z CERAMIC M/L (2125) 1UF 10V K B C645 RC005202 BCML311045Z CERAMIC M/L (1608) 0.1UF 16V K B C646 RC005205 BCML811035Z CERAMIC M/L (1608) 0.01UF 50V K B C647 RC005202 BCML311045Z...
  • Page 38 LOC. REF. PART NO. DESCRIPTION DIODES RC002236 BDAY0246003 1N4148 T-77 RC004851 BDAY0432007 ZENER HZK7C TR RC002468 BDAY0492008 ZENER HZ33-2 TD RC002236 BDAY0246003 1N4148 T-77 RC002236 BDAY0246003 1N4148 T-77 RC008274 BDAY1084001 MVR3338ST-922 RC002236 BDAY0246003 1N4148 T-77 RC002236 BDAY0246003 1N4148 T-77 RC008885 BDAY0492031 ZENER HZ6B2 TD...
  • Page 39 LOC. REF. PART NO. DESCRIPTION JACKS RC008992 BJKY1183002 JACK JK-1183 MJ-62J-RD315 RC001094 BJKY0234001 JACK JK-234 DJ13-1 J603 RC001653 BJKY0571001 JACK JK-571 M60-002-020-HKAD COILS RC008397 BLZY0136100 INDUCTOR:MOLDED CHIP LZ-136 MLF1608K100KT 10UH RC008281 BLBY1175001 COIL LB-1175 7002BE-A0026HM RC008587 BLZY0181107 INDUCTOR:MOLDED CHIP LZ-181 10NH J L602 RC008397 BLZY0136100...
  • Page 40 LOC. REF. PART NO. DESCRIPTION RC005311 BRFC160004Z CARBON FIXED CHIP 0 1/16W J RC005248 BRFC162234Z CARBON FIXED CHIP 22K 1/16W J RC005248 BRFC162234Z CARBON FIXED CHIP 22K 1/16W J RC005242 BRFC161044Z CARBON FIXED CHIP 100K 1/16W J RC005262 BRFC168234Z CARBON FIXED CHIP 82K 1/16W J RC005257 BRFC164734Z...
  • Page 41 LOC. REF. PART NO. DESCRIPTION RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J RC005257 BRFC164734Z CARBON FIXED CHIP 47K 1/16W J RC005242 BRFC161044Z CARBON FIXED CHIP 100K 1/16W J RC005241 BRFC161034Z CARBON FIXED CHIP 10K 1/16W J RC002320 BRFC014714Z CARBON FIXED CHIP 470 1/10W J RC002915 BRFC011514Z...
  • Page 42 LOC. REF. PART NO. DESCRIPTION R104 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R105 RC008029 BRFC163924Z CARBON FIXED CHIP 3.9K 1/16W J R106 RC008553 BRFC161043Z CARBON FIXED CHIP 100K 1/16W F R107 RC005280 BRFC161534Z CARBON FIXED CHIP 15K 1/16W J R108 RC005240 BRFC161024Z CARBON FIXED CHIP...
  • Page 43 LOC. REF. PART NO. DESCRIPTION R616 RC005280 BRFC161534Z CARBON FIXED CHIP 15K 1/16W J R617 RC008454 BRFC165604Z CARBON FIXED CHIP 56 1/16W J R618 RC005242 BRFC161044Z CARBON FIXED CHIP 100K 1/16W J R619 RC005242 BRFC161044Z CARBON FIXED CHIP 100K 1/16W J R620 RC005240 BRFC161024Z CARBON FIXED CHIP...
  • Page 44 LOC. REF. PART NO. DESCRIPTION R663 RC005255 BRFC164714Z CARBON FIXED CHIP 470 1/16W J R664 RC005245 BRFC161834Z CARBON FIXED CHIP 18K 1/16W J R665 RC008028 BRFC162724Z CARBON FIXED CHIP 2.7K 1/16W J R666 RC005280 BRFC161534Z CARBON FIXED CHIP 15K 1/16W J R667 RC005288 BRFC168244Z CARBON FIXED CHIP...
  • Page 45 LOC. REF. PART NO. DESCRIPTION R711 RC008734 BRFC162254Z CARBON FIXED CHIP 2.2M 1/16W J R712 RC005311 BRFC160004Z CARBON FIXED CHIP 0 1/16W J RC008287 BRTY0572204 SEMI-FIXED RT-572 NVZ6TL1B204 200KB RC004606 BRTY0572104 SEMI-FIXED RT-572 NVZ6TL1B104 100KB RC005661 BRTY0572203 SEMI-FIXED RT-572 NVZ6TL1B203 20KB RT601 RC008328 BRTY0569224 SEMI-FIXED...

  • Page 46: Assembly Parts List

    PACKING BAG(PORT.) MIRA MAT RC009344 WSLV444958Z SLEEVE ASSEMBLY PARTS LIST NOTE: Following part numbers are not available as replacement parts. Order parts necessary for repair or contact the Toshiba Factory Service Center. LOC. REF. PART NO. DESCRIPTION RC009518 AC268BHBA BASE MAIN PCB ASSEMBLY...

  • Page 47: Specifications

    SPECIFICATIONS MEASUREMENT CONDITIONS 1. Standard Voltage :Portable Unit ..DC 3.8V ± 0.025V :Base Unit ..AC 120V ± 3V 60Hz 2. Temperature :25°C ± 5°C 3. Channel FCC CH Portable(TX Frequency) Base(TX Frequency) 902.052464MHz 925.997470MHz 902.102465MHz 926.047470MHz 902.152465MHz 926.097470MHz 902.202465MHz 926.147470MHz 902.252465MHz...
  • Page 48 BASE UNIT RECEIVER UNIT NOMINAL LIMIT 1. Sensitivity 12 dB SINAD with CCITT Filter -115 < -107 2. Frequency Response (Ref:1kHz) 0.3kHz -4.5 -8.5~-0.5 3.0kHz -6.0 -10.0~-2.0 3. Distortion at 1 mV RF Input < 5 4. S/N ratio at 1 mV RF Input with CCITT Filter 60 <...
  • Page 49 PORTABLE UNIT RECEIVER UNIT NOMINAL LIMIT 1. Sensitivity 12 dB SINAD with CCITT Filter -115 < -107 2. Frequency Response (Ref:1kHz) 0.3kHz +5.0 +1.0~+9.0 3.0kHz -15.0 -19~-11 3. Audio Output Level (Dev: 8kHz) VOL. LOUD -6.5 -9.5~-3.5 VOL. HIGH -13~-7 VOL.

Table of Contents