Toshiba FT-7807R Service Manual
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Toshiba FT-7807R Service Manual

Toshiba FT-7807R Service Manual

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FILE NO. 2B0-9803
SERVICE MANUAL
CORDLESS TELEPHONE
FT-7807R
PUBLISHED IN JAPAN, Jun., 1998

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Summary of Contents for Toshiba FT-7807R

  • Page 1 FILE NO. 2B0-9803 SERVICE MANUAL CORDLESS TELEPHONE FT-7807R PUBLISHED IN JAPAN, Jun., 1998...

  • 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 ..................19 SEMICONDUCTOR LEAD IDENTIFICATION ................... 23 ELECTRICAL PARTS LOCATION ..................... 27 WIRING DIAGRAM ..........................

  • Page 3: Operating Controls

    OPERATING CONTROLS HANDSET CONTROLS Helical antenna Liquid Crystal Display (LCD) MEM button CID (Caller ID) button Press to enter the caller ID mode. Number 1 button TALK button Used for long distance dialing. Number 8 ( ) button (time button) 0-9, , # Dial buttons Used to display the date and time of the received calls.

  • Page 4: Alignment Procedure

    ALIGNMENT PROCEDURE BASE UNIT / TRANSMITTER Test Equipment Required and Connections • Oscilloscope • Dummy Load, 50-ohm • Frequency Counter • AC Power Supply: 120V, 60Hz (With AC Adapter) • Digital Voltmeter Base Unit Frequency Counter Dummy Load (50-ohm) − RF Test DC IN 9V AC Adapter...
  • Page 5 RECEIVER Test Equipment Required and Connections • SG: RF Signal Generator, 49.830 MHz, 49.160 MHz • Dummy Load, 600-ohm • Digital Voltmeter • AF SSVM • SINAD Meter Base Unit AF SSVM Dummy Load (600-ohm) RF Test TEL Jack Point MOD = 1KHz DEV = ±3kHz Digital Voltmeter...

  • Page 6: Block Diagrams

    HANDSET / TRANSMITTER Test Equipment Required and Connections • DC Power Supply, 3.6V • Digital Voltmeter Frequency Counter Handset Unit Dummy Load (50-ohm) RF Test Point Batt Terminal DC Power Supply Digital Voltmeter TX VCO 3.6V Test Point Preset Turn Power on while depressing “ ” and “#” keys. A beep will be heard. Then the TX Mode is entered (CH21). Alignment Procedure Step Adjustment...
  • Page 7 RECEIVER Test Equipment Required and Connections • SG: RF Signal Generator, 46.770 MHz, 46.610 MHz • Dummy Load, 150-ohm • VTVM • DC Power Supply: 3.6 V • Digital Voltmeter • SINAD Meter Handset Unit VTVM Dummy Load (150-ohm) RF Test Point Terminal Batt Terminal...

  • Page 8: Schematic Diagrams

    — 7 —...
  • Page 9 — 8 —...

  • Page 12: Troubleshooting Hints

    TROUBLESHOOTING HINTS 1. The bell does not ring. When the PAGE SW of the See 2. The bell does not ring base is pressed, does the & page does not ring. ringer on the handset ring? When the TEL SG is joined By using voltage chart, with the base to make bell IC3 is defective.
  • Page 13 2. The bell does not ring & page does not ring. Can the base and handset By using voltage chart, Check the base TX power. be connected? check the base TX circuit. Check the base TX data Check R53, R74, R71, deviation.
  • Page 14 3. The base and handset cannot connect. By using voltage chart, Check whether the Check the base TX power. check the base TX circuit. handset and the base unit are connected. Check the base TX data Check R53, R74, R71, deviation.
  • Page 15 Then, can the sine wave Check Q2 and surrounding be seen at the Q2 Collector. circuit of Q2. Check the surrounding circuit of T1. 4. Cannot make a phone call (pulse). Can the base and handset See 3. The base and be connected? handset cannot connect.

  • Page 16: Voice Cannot Be Transmitted To Other Party (Outgoing Call)

    6. Voice cannot be transmitted to other party (outgoing call). At the MIC of the handset, Check R548, R534, R532 Check the handset MIC does the bias voltage exist? and C555. sensitivity. Check the base RX In the base, with the SG Check the handset TX AF TEL-line out.
  • Page 17 7. The voice of the caller cannot be heard (incoming call). In the handset, with the SG Check the handset IF Check the handset RX SP standard modulation of circuit (around Pins 26~29 out. 1kHz 3kHz deviation and of IC504). input signal of 1mV, can the sine wave be seen at Pin 25 of IC504?

  • Page 18: Ic And Transistor Voltage Chart

    IC AND TRANSISTOR VOLTAGE CHART Transistors Unit [V] Unit [V] Ref. Ref. STBY TALK Note STBY TALK Note 0.0~0.8 Q501 0.0~3.2 Q502 2.8~3.3 3.3~4.8 Q503 1.6~2.2 0.6~0.8 Q504 1.4~3.4 1.2~1.6 0.0~0.6 1.4~2.2 Q505 0.7~1.4 Q506 0.0~2.0 Q507 Q508 Q509 0.0~3.2 2.8~3.3 Q510 Q511...
  • Page 19 IC’S Unit [V] Unit [V] Ref. Ref. STBY TALK Note STBY TALK Note 0~4.2 0~4.2 0~4.9 DATA 0.4~4.0 0.4~4.0 4.2~4.7 0~4.9 0~4.9 0~4.9 2.0~3.6 2.0~3.6 0~4.7 DATA 2.0~3.1 2.0~3.2 1.1~1.7 0.1~0.3 1.8~2.3 4.6~4.9 4.6~4.9 3.7~4.7 3.7~4.0 4.0~4.2 0~4.7 DATA 3.2~3.7 3.3~3.6 3.3~3.6 0.3~0.5...
  • Page 20 IC’S Unit [V] Unit [V] Ref. Ref. STBY TALK Note STBY TALK Note IC501 IC502 -0.8~0.9 -0.8~0.9 1.1~3.2 0.0~3.0 -0.1~3.0 1.4~3.2 3.2~1.4 IC503 -0.1~3.0 -0.1~3.4 0.6~3.4 IC101 1.1~3.3 0.0~3.2 0.0~3.2 IC103 0.0~3.2 2.8~3.3 0.0~3.3 IC501 0.0~3.2 0.1~3.2 DATA 0.0~3.2 —21—...
  • Page 21 Unit [V] Unit [V] Ref. Ref. STBY TALK Note STBY TALK Note 1.8~2.0 0.0~2.7 0.0~3.3 0.0~3.3 0.0~3.3 DATA 0.0~0.7 0.3~0.6 0.0~3.3 DATA 0.0~0.7 0.3~0.6 0.0~3.2 DATA 0.0~3.0 0.0~3.2 DATA IC503 IC504 0.0~3.2 DATA 0.0~3.2 DATA 0.0~3.3 0.0~0.3 0.0~3.2 DATA 0.0~0.3 0.0~1.6 0.0~1.5 0.0~2.6...

  • Page 22: Semiconductor Lead Identification

    SEMICONDUCTOR LEAD IDENTIFICATION Base Unit D1: HZ7C3 D2/D6/D105/D106/D107/ D4: HZ6C3 D108/D110/D111: RLS4148 D5/D7/D8/D101/D102/ D103/D104: 1N4148 D109: HZ33CP Anode Cathode Cathode Anode D3: KV1832C D9/D10: LTL-16KPE-A D11: LTL-16KGE-A Cathode Anode Cathode Anode Q1/Q3/Q4: 2SC2714-Y Q7: 2SC2120-Y Q2/Q5/Q6/Q8/Q9/Q11: 2SC2712-GR Q10: 2SC1815-Y Q12/Q13/Q14/Q15/Q16: 2SA1162-G B: Base B: Base E: Emitter...
  • Page 23 µPD789026 MC13111FB LO2 In Mix1 In1 LO2 Out Mix1 In2 Mix1 Out Rx PD GND RF PLL Vref Mix2 Out Tx PD Mix2 In P47/KR7 GND PLL SGND RF P46/KR6 TX VCO Lim In P45/KR6 P20/ASCK/SCK0 Data Lim C1 P44/KR4 Lim C2 P21TxD/SO0 Vcc RF...
  • Page 24 Handset D501: KV1832C D502: 1N4148 D503/D510: HZ6C3 Cathode Anode Cathode Anode D504: 1SS226 D505/D507: PG3822K C / A Cathode Anode D508//D509: HSM88WA D506: RLS4148 A / A Cathode Anode D511: DCB010 Q501/Q504/Q505: 2SC2714-Y Q502/Q511/Q512/Q514/Q515/Q516: 2SC2712-GR Q503/Q506/Q507/Q508/Q509/Q510/Q513: 2SA1162-G B: Base E: Emitter C: Collector —...
  • Page 25 IC501 24LC16BT/SN IC502 RH5VL28CA IC503 IC504 MB89627R MC13111FB 64 63 62 61 60 59 58 57 56 55 54 53 52 LO2 In Mix1 In1 P31/SCK1 P46/INT26 LO2 Out Mix1 In2 P30/PPG03 P47/INT27 Mix1 Out P50/AN0 Rx PD GND RF P51/AN1 PLL Vref Mix2 Out...

  • Page 26: Electrical Parts Location

    — 27 —...
  • Page 27 — 28 —...

  • Page 28: Wiring Diagram

    — 29 —...

  • Page 29: Exploded View And Mechanical Parts List

    EXPLODED VIEW AND MECHANICAL PARTS LIST Base Unit — 30 —...

  • Page 30: Base Unit

    Base Unit LOC. PART NO. REF. NO. DESCRIPTION RC005527 GNBZ356907Z Button, Push RC005523 GCAS356903Z Case, Bottom RC005522 GCAS156902Z Case, Top RC005665 HTML457208Z Charge Terminal (Comp) C5191(PBP) RC008796 PLBS458442Z Label, ID RC005532 RCLR419970Z Cushion Bumpon RC002384 LFUT428079Z Foot Bumpon SJ-5916 1.6T RC005526 GCAS456906Z Hook...
  • Page 31 Handset — 32 —...
  • Page 32 Handset LOC. PART NO. REF. NO. DESCRIPTION RC004280 HTML451205Z Antenna Contact C5191(PBP) RC005561 RBLD456730Z Blind RC005551 GNBZ356911Z Button, Function RC005552 GNBZ456912Z Button, Push RC005547 GCAS156908Z Case, Front RC005548 GCAS356909Z Case, Rear RC005671 HTML457209Z Chage Terminal C2680(BSP) RC005672 HTML457210Z Charge Terminal C2680(BSP) RC005549 GCAS356910Z...

  • Page 33: 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 34 LOC. PART NO. DESCRIPTION RC004492 BCUA818204Z CERAMIC 82PF 50V J CH RC004608 BCUB312245Z CERAMIC 0.22UF 16V K B RC004500 BCUB812235Z CERAMIC 0.022UF 50V K B RC004561 BCUB813935Z CERAMIC 0.039UF 50V K B RC004945 BCAP111016Z ELECTROLYTIC 100UF 10V M C-130 RC004562 RCUB814725Z CERAMIC 0.0047UF 50V K B...
  • Page 35 LOC. PART NO. DESCRIPTION RC004500 BCUB812235Z CERAMIC 0.022UF 50V K B RC004740 BCUE813091Z CERAMIC 3PF 50V C CJ RC004496 BCUB811025Z CERAMIC 0.001UF 50V K B RC004659 BCXB811025Z CERAMIC 0.001UF 50V K B RC004659 BCXB811025Z CERAMIC 0.001UF 50V K B RC004497 BCUB811035Z CERAMIC 0.01UF 50V K B...
  • Page 36 LOC. PART NO. DESCRIPTION C521 RC004185 BCSS951006Z TANTALUM CHIP 10UF 7V M A C-241 C522 RC004497 BCUB811035Z CERAMIC 0.01UF 50V K B C523 RC004491 BCUA816804Z CERAMIC 68PF 50V J CH C524 RC004488 BCUA814714Z CERAMIC 470PF 50V J CH C525 RC004502 BCUB814735Z CERAMIC 0.047UF 50V K B...
  • Page 37 LOC. PART NO. DESCRIPTION C569 RC005166 BCUP311050Z CERAMIC 1UF 16V Z F C570 RC004741 BCUP811040Z CERAMIC 0.1UF 50V Z F C571 RC004490 BCUA816092Z CERAMIC 6PF 50V D CH C572 RC004496 BCUB811025Z CERAMIC 0.001UF 50V K B C573 RC004747 BCUA813314Z CERAMIC 330PF 50V J CH C574 RC004659...
  • Page 38 LOC. PART NO. DESCRIPTION D503 RC002471 BDAY0492045 ZENER HZ6C3TD D504 RC001635 BDAY0274001 DIODE 1SS226 TE85L D505 RC005534 BDAY0931001 PG3822K D506 RC001826 BDAY0433001 DIODE RLS4148 TE11 D507 RC005534 BDAY0931001 PG3822K D508 RC002240 BDAY0485001 DIODE HSM88WA TL D509 RC002240 BDAY0485001 DIODE HSM88WA TL D510 RC002471 BDAY0492045...
  • Page 39 LOC. PART NO. DESCRIPTION RC004248 BLZY0040470 INDUCTOR LZ-040 47UH RC003693 BLZY0041478 INDUCTOR LZ-041 0.47UH K RC004643 BLBY1106001 COIL LB-1106 PD600XCAS-9475RS RC004642 BLBY1105001 COIL LB-1105 291XCAS-9471IB RC004248 BLZY0040470 INDUCTOR LZ-040 47UH RC003693 BLZY0041478 INDUCTOR LZ-041 0.47UH K RC004641 BLBY1104001 COIL LB-1104 291XCAS-9472IB RC004249 BLZY0041229 INDUCTOR...
  • Page 40 LOC. PART NO. DESCRIPTION Q506 RC001081 BDBA1162107 TRANSISTOR DB-036 2SA1162-G(GR)TE85L Q507 RC001081 BDBA1162107 TRANSISTOR DB-036 2SA1162-G(GR)TE85L Q508 RC001081 BDBA1162107 TRANSISTOR DB-036 2SA1162-G(GR)TE85L Q509 RC001081 BDBA1162107 TRANSISTOR DB-036 2SA1162-G(GR)TE85L Q510 RC001081 BDBA1162107 TRANSISTOR DB-036 2SA1162-G(GR)TE85L Q511 RC001637 BDBC2712303 TRANSISTOR DB-381 2SC2712-GR TE85L Q512 RC001637 BDBC2712303...
  • Page 41 LOC. PART NO. DESCRIPTION RC004511 BRFX011014Z CARBON 100 1/10W J BULK RC004539 BRFX014734Z CARBON 47K 1/10W J BULK RC004546 BRFX016834Z CARBON 68K 1/10W J BULK RC004543 BRFX015644Z CARBON 560K 1/10W J BULK RC004537 BRFX014714Z CARBON 470 1/10W J BULK RC004537 BRFX014714Z CARBON 470 1/10W J BULK...
  • Page 42 LOC. PART NO. DESCRIPTION RC004551 BRFX181024Z CARBON 1K 1/8W J BULK RC004551 BRFX181024Z CARBON 1K 1/8W J BULK RC004512 BRFX011024Z CARBON 1K 1/10W J BULK RC004551 BRFX181024Z CARBON 1K 1/8W J BULK RC004551 BRFX181024Z CARBON 1/8W J BULK RC004551 BRFX181024Z CARBON 1K 1/8W J BULK RC004551...
  • Page 43 LOC. PART NO. DESCRIPTION R135 RC004517 BRFX011244Z CARBON 120K 1/10W J BULK R136 RC004512 BRFX011024Z CARBON 1K 1/10W J BULK R137 RC004518 BRFX011534Z CARBON 15K 1/10W J BULK R138 RC004539 BRFX014734Z CARBON 47K 1/10W J BULK R139 RC004525 BRFX012224Z CARBON 2.2K 1/10W J BULK R140 RC004534...
  • Page 44 LOC. PART NO. DESCRIPTION R531 RC004742 BRFX011524Z CARBON 1.5K 1/10W J BULK R532 RC004513 BRFX011034Z CARBON 10K 1/10W J BULK R533 RC004512 BRFX011024Z CARBON 1K 1/10W J BULK R534 RC004538 BRFX014724Z CARBON 4.7K 1/10W J BULK R535 RC004513 BRFX011034Z CARBON 10K 1/10W J BULK R536 RC004529...
  • Page 45 LOC. PART NO. DESCRIPTION R578 RC004527 BRFX012244Z CARBON 220K 1/10W J BULK R579 RC004513 BRFX011034Z CARBON 10K 1/10W J BULK R580 RC004540 BRFX014744Z CARBON 470K 1/10W J BULK R581 RC004513 BRFX011034Z CARBON 10K 1/10W J BULK R582 RC004551 BRFX181024Z CARBON 1K 1/8W J BULK R583 RC004512...
  • Page 46 LOC. PART NO. DESCRIPTION BT901 RC004362 BBTY0291001 BATTERY BT-291 AA-884(3N-270AA) DP501 RC005538 BDLY0166001 MODULE:LCD DL-166 NCOG-030 MC501 RC004062 BMKY0475001 MICROPHONE MK-475 WM-034BZ RC000867 BRLY0042001 RELAY RL-042 OMR-108H SP501 RC002358 BYYY0438001 PIEZO ELECTRIC BUZZER YY-438 CB-12GP SP801 RC004272 BSPY0348001 SPEAKER SP-348 KR-286HA WA801 RC002514 CZDZ071854Z WIRES ASSEMBLED...

  • Page 47: Assembly Parts List

    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. PART NO. DESCRIPTION AD559ZLBA BASE MAIN ASSEMBLY RC008805 RC008806 AD559ZLPA HANDSET MAIN ASSEMBLY — 48 —...

  • Page 48: Specifications

    SPECIFICATIONS MEASUREMENT CONDITIONS 1. Standard voltage: Handset: DC 3.6 V ±0.025 V AC 120 V ±3 V 60 Hz Base: 25°C ±5 °C 2. Temperature: 3. Channel: Handset (TX Frequency) Base (TX Frequency) 48.760 MHz 43.720 MHz 48.840 MHz 43.740 MHz 48.860 MHz 43.820 MHz 48.920 MHz...
  • Page 49 BASE UNIT RECEIVER Unit Nominal Limit µV 1. Sensitivity 12 dB SINAD 2. Bandwidth at 6 dB down −3.5 −7.5 ~ +0.5 3. Frequency Response 0.3 kHz −5 −9 ~ −1 3.0 kHz 4. Distortion at 1 mV Input 5. S/N ratio at 1 mV RF Input TRANSMITTER 1.
  • Page 50 HANDSET UNIT RECEIVER Unit Nominal Limit µV 1. Sensitivity 12 dB SINAD 2. Bandwidth at 6 dB down −3 −7 ~ +1 3. Frequency Response 0.3 kHz −6 −10 ~ −2 3.0 kHz 4. Audio Output Power at 1 mV Input 75 ~ 170 5.

  • Page 51: Appendix

    2) Press CID (Caller ID) button. Then, the Caller ID memory will be deleted with the confirmation beep sound. Information of the Serial No. for Model FT-7807R The production of Model FT-7807R was started in April 1998, and the Serial No. started from 846000001. — 52 —...
  • Page 52 MECHANICAL PARTS LIST...

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