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Toshiba FT-8930 Service Manual
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Toshiba FT-8930 Service Manual

Toshiba FT-8930 Service Manual

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FILE NO. 2B0-200008
SERVICE MANUAL
CORDLESS TELEPHONE
FT-8930
PUBLISHED IN JAPAN, Sep., 2000

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Summary of Contents for Toshiba FT-8930

  • Page 1 FILE NO. 2B0-200008 SERVICE MANUAL CORDLESS TELEPHONE FT-8930 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 ......................10 TROUBLESHOOTING HINTS ....................16 IC AND TRANSISTOR VOLTAGE CHART ................23 SEMICONDUCTOR LEAD IDENTIFICATION ................30 ELECTRICAL PARTS LOCATION ..................... 33 WIRING DIAGRAMS .........................

  • Page 3: Operating Controls

    OPERATING CONTROLS HANDSET CONTROLS AND FUNCTIONS Antenna TALK TALK/BATT LOW LED BATT LOW RDL/P (Redial/Pause)Button 900MHz COMPANDOR NOISE REDUCTION TALK Button FLASH RLD/P FLASH Button Dialpad TONE (TONE) Button OPER VOL/RING MEM (Memory) Button MUTE VOL/RING Button MUTE Button CH (channel)Button Charging contact Rechargeable Battery Pack(back)

  • Page 4: Alignment Procedure

    ALIGNMENT PROCEDURE Base Unit Transmitter Section BASE Unit AF GEN. Test Point Connections Power Meter DC IN TEL Line 1kHz -15dBm 9V Jack Jack Test Point Frequency Counter AC 120V Adapter 60Hz Deviation Mater Preset Press the “PAGE” key about 3.0 seconds while truning the power on. Alignment Procedure step Adjustment...
  • 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 Test Point AC 120V 60Hz Adapter Preset Place the Base Unit in RX SENS mode (step 4) in accordance with the precedure on page 3. Alignment Procedure step Preset to...
  • Page 6 Handset Unit Transmitter Section Connection HANDSET Unit AF GEN. Test Point Power Meter J601 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) Test Point Terminal DC Power Supply J601 DC Voltmeter Battery Test Point 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, Main...
  • Page 9 Base Unit, DSP...
  • Page 10 Handset...

  • Page 14: Troubleshooting Hints

    TROUBLESHOOTING HINTS 1. The bell does not ring. Set RINGER ON/OFF SW on Check RINGER ON/OFF SW on Base to ON position. Base ON Position. See 2. The bell does not ring When the PAGE SW of the & page does not ring. base is pressed, does the ringer on the handset ring? When the TEL SG is joined...
  • Page 15 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 IC604. while in TALK MODE.
  • Page 16 3. The base and handset cannot be connected. Check whether the base Check IC11 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. Set the base in the test Check whether there is a Check RT3, R30, R76,...
  • Page 17 Set the handset in the Check whether there is a Check RT603, R641, test mode 3, check 250 Hz data waveform at R642, R643, R644, whether deviation of the “MOD” of RF unit. R645 and C653. TX data is app. 9.0 kHz Dev.
  • Page 18 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 IC11. dial key of the handset. Check whether square waveform from pin 13 of IC11 is fed.

  • Page 19: 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 20 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, -15dBm 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 21: Ic And Transistor Voltage Chart

    IC AND TRANSISTOR VOLTAGE CHART Base Unit, Main Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE DATA(PULSE) X'TAL X'TAL X'TAL X'TAL IC11...
  • Page 22 Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE IC11 (PULSE)PLLENB (PULSE)PLLDAT (PULSE)PLLCLK 0.17 0.17 2.78 2.78...
  • Page 23 Base Unit, Key Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE VccA IC451 X'TAL X'TAL IC452 IC452 0-3.7 0-3.7 WDT(PULSE) VccA...
  • Page 24 Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE IC452 IC458 IC454 IC459 IC460 IC458...
  • Page 25 Unit[V] Ref. No. PIN STBY TALK NOTE Q452 Q454 Q455 Q456 Q457 Q458 Q459...
  • Page 26 Handset Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE 0/SineWave SineWave 10.1MHz 10.1MHz 0/SineWave SineWave 3.58MHz 0/SineWave SineWave 10.1MHz 10.1MHz 3.6/SineWave SineWave 3.58MHz 3.58MHz 0-2.4 ClippedWave PULSE 455kHz 3.58MHz 0-3.0 PULSE 0-2.6 SineWave PULSE 455kHz 0-2.6 PULSE 0-2.6...
  • Page 27 Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE 0-3.5 PULSE 0-0.6 PULSE Q612 IC605 0-1.3 PULSE 0-0.6 PULSE PULSE 0-0.7 PULSE BATT:3.8V BATT:3.8V Q613 BATT:3.8V BATT:3.8V 0-3.8 PULSE BATT:3.8V BATT:3.8V IC606 BATT:3.8V BATT:3.8V BATT:3.8V BATT:3.8V 0-0.7 PULSE Q601...

  • Page 28: Semiconductor Lead Identification

    SEMICONDUCTOR LEAD IDENTIFICATION Base Unit D451/D458/D460 D457/D467/D468 D1/D2/D4/D5/D6/D8/D9 /D461/D462 : SML-310LT /D10/D11/D16/D26 : 1N4148 /D469/D470 : RLS4148 D452/D459 : SML-310MT D465/D466 : HZK6C D3 : HZ7C3 D7 : HZ33CP D14 : HZ4B1 Anode Cathode Anode Cathode D18 : HZ7A1 Anode D31 : HZ6C3 Cathode Q1 : 2SC2714...
  • Page 29 IC451 IC454 IC11 MC34119D TC74HC132AF MB89176PF DTMF P36 / INT2 P37 / BZ MDD0 P00 / L10 MDD1 P01 / L11 P02 / L12 P03 / L13 P04 / L14 P50 / (X0A) P05 / L15 P51(Z1A) P06 / L16 Q456 : 2SD1618 IC458 : K9F4008WOA P07 / L17...
  • Page 30 Handset D601/D602/D605/D606 : RLS4148 D608 : SML-310LT D607 D603/D604 : HZK6C RB420D Cathode Cathode Anode Cathode Anode Anode (Open) Q601 : 2SC2714 Q602/Q604/Q605/Q606/Q607/Q608 /Q609/Q610/Q611/Q612/Q613 : 2SC1623 Q603 : 2SA812(M) B : Base E : Emitter C : Collector IC601 MC3361CDR2 IC604 MB89177LPF P36 / INT2...

  • Page 31: Electrical Parts Location

    ELECTRICAL PARTS LOCATION Base Unit Main PCB...
  • Page 32 Base Unit Key PCB...
  • Page 33 Handset Main PCB...
  • Page 35 Handset...

  • Page 36: Exploded View And Mechanical Parts List

    EXPLODED VIEWS AND MECHANICAL PARTS LIST Base Unit MAIN PCB RF MODULE KEY PCB (BASE) ANTENNA...

  • Page 37: Base Unit

    Base Unit LOC. REF. PART NO. DESCRIPTION RC009411 RBLD459384Z BLIND RC009557 GNBZ447715Z BUTTON, FUNCTION RC009558 GNBZ447716Z BUTTON, FUNCTION RC009559 GNBZ447717Z BUTTON, FUNCTION RC009402 GNBZ446378Z BUTTON, PUSH PMMA RC009556 GCAS247714A CASE, BOTTOM RC009555 GCAS247713A CASE, TOP RC009325 HTML446079Z CHARGE TERMINAL C5191(PBP) RC009396 GCAS346381Z DISPLAY WINDOW...
  • Page 38 Handset RF MODULE (HANDSET) MAIN PCB ASSY...
  • Page 39 Handset LOC. REF. PART NO. DESCRIPTION RC008346 RBLD442400Z BLIND RC009454 GNBZ447689Z BUTTON, FUNCTION RC009448 GCAS347685Z CASE, FRONT RC009449 GCAS347686A CASE, REAR RC009326 HTML446093Z CHARGE TERMINAL C2680(BSP) RC008703 GCAS457897Z COVER ELASTOMER RC009451 GCAS447687A COVER, BATTERY RC008348 RCUN442433Z CUSHION NEOPRENE RC009337 RCUN447997Z CUSHION MOLTOPREN RC009452...

  • Page 40: 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 ±...
  • Page 41 LOC. REF. PART NO. DESCRIPTION RC008843 BCML313335Z CERAMIC M/L (1608) 0.033UF 16V K B RC008270 BCML811235Z CERAMIC M/L (1608) 0.012UF 50V K B RC008318 BCML815625Z CERAMIC M/L (1608) 0.0056UF 50V K B RC001809 BCAZ814786Z ELECTROLYTIC 0.47UF 50V M C-156 RC008318 BCML815625Z CERAMIC M/L (1608) 0.0056UF 50V K B...
  • Page 42 LOC. REF. PART NO. DESCRIPTION RC008106 BCAZ313316Z ELECTROLYTIC 330UF 16V M C-156 RC005205 BCML811035Z CERAMIC M/L (1608) 0.01UF 50V K B RC001795 BCAZ112216Z ELECTROLYTIC 220UF 10V M C-156 RC001794 BCAZ111016Z ELECTROLYTIC 100UF 10V M C-156 RC005468 BCEQ904706Z ELECTROLYTIC 47UF 6.3V M C-125 RC005205 BCML811035Z CERAMIC M/L (1608)
  • Page 43 LOC. REF. PART NO. DESCRIPTION C231 RC008731 BCXK311050Z CERAMIC M/L (2125) 1UF 16V Z F C232 RC001794 BCAZ111016Z ELECTROLYTIC 100UF 10V M C-156 C453 RC009271 BCDB901016Z ELECTROLYTIC 100UF 6.3V M C-326 C455 RC009372 BCML511835Z CERAMIC M/L (1608) 0.018UF 25V K B C456 RC008296 BCSH901006Z TANTALUM CHIP...
  • Page 44 LOC. REF. PART NO. DESCRIPTION C614 RC005202 BCML311045Z CERAMIC M/L (1608) 0.1UF 16V K B C616 RC008731 BCXK311050Z CERAMIC M/L (2125) 1UF 16V Z F C617 RC004347 BCXK514740Z CERAMIC M/L (2125) 0.47UF 25V Z F C618 RC002229 BCXT511045Z CERAMIC M/L (2125) 0.1UF 25V K B C619 RC008270 BCML811235Z...
  • Page 45 LOC. REF. PART NO. DESCRIPTION C665 RC005207 BCML813325Z CERAMIC M/L (1608) 0.0033UF 50V K B C666 RC005207 BCML813325Z CERAMIC M/L (1608) 0.0033UF 50V K B C667 RC009271 BCDB901016Z ELECTROLYTIC 100UF 6.3V M C-326 C668 RC005205 BCML811035Z CERAMIC M/L (1608) 0.01UF 50V K B C669 RC008296 BCSH901006Z TANTALUM CHIP...
  • Page 46 LOC. REF. PART NO. DESCRIPTION D472 RC008448 BDAY1065001 RB420D T146 D601 RC001826 BDAY0433001 RLS4148 TE11 D602 RC001826 BDAY0433001 RLS4148 TE11 D603 RC003195 BDAY0432004 ZENER HZK6C TR D604 RC003195 BDAY0432004 ZENER HZK6C TR D605 RC001826 BDAY0433001 RLS4148 TE11 D606 RC001826 BDAY0433001 RLS4148 TE11 D607 RC008448 BDAY1065001...
  • Page 47 LOC. REF. PART NO. DESCRIPTION L602 RC008281 BLBY1175001 COIL LB-1175 7002BE-A0026HM L603 RC008398 BLZY0181186 INDUCTOR:MOLDED CHIP LZ-181 1.8NH RC003234 BTFY0265001 TRANSFORMER:HYBRID TF-265 AT-24E7-1B(295403) TRANSISTORS RC002245 BDBC2714124 DB-718 2SC2714-Y TE85L RC003031 BDBC1623648 DB-380 2SC1623-L6 T1B RC001637 BDBC2712303 DB-381 2SC2712-GR TE85L RC003031 BDBC1623648 DB-380 2SC1623-L6 T1B RC008275...
  • Page 48 LOC. REF. PART NO. DESCRIPTION RC005255 BRFC164714Z CARBON FIXED CHIP 470 1/16W J RC005245 BRFC161834Z CARBON FIXED CHIP 18K 1/16W J RC008028 BRFC162724Z CARBON FIXED CHIP 2.7K 1/16W J RC005288 BRFC168244Z CARBON FIXED CHIP 820K 1/16W J RC005281 BRFC162224Z CARBON FIXED CHIP 2.2K 1/16W J RC005241 BRFC161034Z...
  • Page 49 LOC. REF. PART NO. DESCRIPTION RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J RC005257 BRFC164734Z CARBON FIXED CHIP 47K 1/16W J RC008306 BRFC161524Z CARBON FIXED CHIP 1.5K 1/16W J RC005241 BRFC161034Z CARBON FIXED CHIP 10K 1/16W J RC005432 BRFC161544Z...
  • Page 50 LOC. REF. PART NO. DESCRIPTION R100 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R101 RC005242 BRFC161044Z CARBON FIXED CHIP 100K 1/16W J R102 RC005242 BRFC161044Z CARBON FIXED CHIP 100K 1/16W J R103 RC008734 BRFC162254Z CARBON FIXED CHIP 2.2M 1/16W J R104 RC005240 BRFC161024Z CARBON FIXED CHIP...
  • Page 51 LOC. REF. PART NO. DESCRIPTION R154 RC005252 BRFC163314Z CARBON FIXED CHIP 330 1/16W J R157 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R158 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R161 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R162 RC008479 BRFC161844Z CARBON FIXED CHIP...
  • Page 52 LOC. REF. PART NO. DESCRIPTION R237 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R238 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R239 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R240 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R241 RC005240 BRFC161024Z CARBON FIXED CHIP...
  • Page 53 LOC. REF. PART NO. DESCRIPTION R285 RC005257 BRFC164734Z CARBON FIXED CHIP 47K 1/16W J R286 RC005248 BRFC162234Z CARBON FIXED CHIP 22K 1/16W J R287 RC005257 BRFC164734Z CARBON FIXED CHIP 47K 1/16W J R288 RC008091 BRFC165614Z CARBON FIXED CHIP 560 1/16W J R289 RC005240 BRFC161024Z CARBON FIXED CHIP...
  • Page 54 LOC. REF. PART NO. DESCRIPTION R495 RC005253 BRFC163324Z CARBON FIXED CHIP 3.3K 1/16W J R496 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R497 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R498 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R601 RC005249 BRFC162244Z CARBON FIXED CHIP...
  • Page 55 LOC. REF. PART NO. DESCRIPTION R646 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R647 RC005281 BRFC162224Z CARBON FIXED CHIP 2.2K 1/16W J R648 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R649 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J R650 RC005240 BRFC161024Z CARBON FIXED CHIP...
  • Page 56 LOC. REF. PART NO. DESCRIPTION RT603 RC008327 BRTY0569223 SEMI-FIXED RT-569 POZ3AN-1-223N-T00 SWITCHES RC003604 BSWY0755001 SLIDE SW-755 SBHA12B-06 RC003604 BSWY0755001 SLIDE SW-755 SBHA12B-06 RC005118 BSWY0756001 SLIDE SW-756 SBHA13B-06 RC005118 BSWY0756001 SLIDE SW-756 SBHA13B-06 CRYSTALS RC003629 BQXY0542001 CRYSTAL QX-542 3.579545MHZ RC008478 BQXY0724001 CRYSTAL QX-724 10.1MHZ X451...

  • Page 57: Assembly Parts List

    WSLV435626Z MIRROR MAT RC009416 WSLV447515Z 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 RC009537 AC269BHBA BASE MAIN PCB ASSEMBLY...

  • Page 58: Specifications

    SPECIFICATIONS MEASUREMENT CONDITIONS 1. Standard Voltage :Portable Unit ..DC 3.8V ± 0.025V :Base Unit ..AC 120V ± 3V 60Hz 2. Temperature :25 ˘ ± 5 ˘ 3. Channel FCC CH Portable(TX Frequency) Base(TX Frequency) 902.052465MHz 925.997470MHz 902.102465MHz 926.047470MHz 902.152465MHz 926.097470MHz 902.202465MHz...
  • Page 59 BASE UNIT RECEIVER UNIT NOMINAL LIMIT 1. Sensitivity 12 dB SINAD with CCITT Filter -115 < -107 2. Frequency Response (Ref:1kHz) 0.3kHz -7.5 -11.5~-3.5 3.0kHz -8.5 -12.5~-4.5 3. Distortion at 1 mV RF Input < 5.0 4. S/N ratio at 1 mV RF Input with CCITT Filter 60 <...
  • Page 60 HANDSET UNIT RECEIVER UNIT NOMINAL LIMIT 1. Sensitivity 12 dB SINAD with CCITT Filter -115 < -107 2. AF Frequency Response (Ref:1kHz) 0.3kHz 1.5~9.5 3.0kHz -17.0 -21.0~-13.0 3. Audio Output Level VOL. HIGH -9~-3 VOL. MEDIUM -15~-9 VOL. LOW -23~-17 4.

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