Toshiba FT-8006A Service Manual
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Toshiba FT-8006A Service Manual

Toshiba FT-8006A Service Manual

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Download this manual See also: Owner's Manual
SERVICE MANUAL
CORDLESS TELEPHONE
The changes specified in this SUPPLEMENT are applied for the units with a dot mark shown
just after the Serial No. (ex. 836000001). Please check the dot mark shown after the Serial
No. on the bottom of the Base unit and Handset for repair. Use this manual together with
service data FT-8006A File No. 2B0-9702.
FT-8006A
— SUMMARY —
FILE NO. 2B3-9801
SUPPLEMENT
PUBLISHED IN JAPAN, Jun., 1998

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  • Page 1 Serial No. (ex. 836000001). Please check the dot mark shown after the Serial No. on the bottom of the Base unit and Handset for repair. Use this manual together with service data FT-8006A File No. 2B0-9702. PUBLISHED IN JAPAN, Jun., 1998...

  • Page 2: Table Of Contents

    CONTENTS ALIGNMENT PROCEDURE ......................... 2 BLOCK DIAGRAMS ..........................6 SCHEMATIC DIAGRAMS ........................8 TROUBLESHOOTING HINTS ......................12 IC AND TRANSISTOR VOLTAGE CHART ..................14 SEMICONDUCTOR LEAD IDENTIFICATION ................... 15 ELECTRICAL PARTS LOCATION ..................... 16 EXPLODED VIEW AND MECHANICAL PARTS LIST ..............18 PARTS LIST ............................

  • Page 3: Alignment Procedure

    ALIGNMENT PROCEDURE Base Unit Transmitter Section Connection BASE RF PCB BASE MAIN PCB AF GEN. Test Point Power Meter Test Point DC IN TEL Line 1kHz 77.5mV 9V Jack Jack Test Point Frequency Counter AC 120V Adapter 60Hz Deviation Meter Preset a) Connect the base RF unit to the base main unit.
  • Page 4 Receiver Section Connection BASE RF PCB BASE MAIN PCB AC Voltmeter RF SG Dummy Load (600-ohm) − − TEL Line DC IN Jack Test Point 9V Jack DC Voltmeter AF Terminal AC 120V AC Adapter 60Hz Preset a) Connect the base RF unit to the base main unit. b) Set the “TONE/PULSE”...

  • Page 5: Block Diagrams

    Handset Unit Transmitter Section Connection HANDSET MAIN PCB HANDSET RF PCB AF GEN. Test Point Power Meter J603 Test Point Battery 1kHz 10.5mV MIC + Pin Connector Test Point Frequency Counter DC Power Supply Deviation DC 3.8V Meter Preset a) Connect the handset RF unit to the handset main unit. b) Connect DC power supply to battery connector on the handset unit.
  • Page 6 Receiver Section Connection HANDSET RF PCB HANDSET MAIN PCB AC Voltmeter RF SG Dummy Load (150-ohm) J602 − − J603 Battery Connector Test Point Connector DC Voltmeter DC Power Supply AF Terminal 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.

  • Page 7: Schematic Diagrams

    — 6 —...
  • Page 8 — 7 —...

  • Page 11: Troubleshooting Hints

    TROUBLESHOOTING HINTS The base and handset cannot be connected. Check IC4 and its Check whether the base is peripheral circuit. able to set in the test mode 1. Check the TX POWER and Check base RF unit. the TX FREQUENCY on the base unit.
  • Page 12 Set the handset in the test Check whether there is a Check VR601, R619, R632, mode 3, check whether 250Hz data waveform at R634, R635, R636 deviation of the TX data is pin 9 of J601. and C611. app. 7 kHz Dev. Check handset RF unit.

  • Page 13: Ic And Transistor Voltage Chart

    IC AND TRANSISTOR VOLTAGE CHART IC’s Unit [V] Unit [V] Ref. Ref. STBY TALK Note STBY TALK Note 1.64 1.69 0.58 2.74 2.76 2.62 2.64 1.93 1.94 3.01 1.75 0.98 3.15 3.10 3.09/0 3.09 3.14 3.10 3.07/0 3.07 2.70 2.66 2.66/0 2.66 1.80...

  • Page 14: Semiconductor Lead Identification

    SEMICONDUCTOR LEAD IDENTIFICATION Base Unit D202/D203: 1SV270 Q202: 2SA-1162 IC202 Q206/Q207/Q212: 2SC5065 M64084AGP Cathode Anode MIX REF Tx OUT MIX IN B: Base Tx Vcc Rx Vcc E: Emitter C: Collector Tx GND Rx GND Xout Lock MIX OUT Handset Unit D502/D503: 1SV270 Q502: 2SA-1162 IC502...

  • Page 15: Electrical Parts Location

    ELECTRICAL PARTS LOCATIONS Base, RF — 16 —...
  • Page 16 Handset, RF — 17 —...

  • Page 17: Exploded View And Mechanical Parts List

    EXPLODED VIEW AND MECHANICAL PARTS LIST Base Unit LOC. PART NO. REF. NO. DESCRIPTION Q'ty RC008768 GSDC258035Z Shield Case RC008769 GSDC258036Z Shield Case RC008788 PLBS458425Z Label, ID Polyester RC008772 PLBS458085Z Label, ID for BK/GR Polyester RC008770 HSDC458037Z Shield Case SPTE RC008771 HSDC458038Z Shield Case...

  • Page 18: Parts List

    PARTS LIST LOC. PART NO. DESCRIPTION CAPACITORS The following codes indicate variation of capacitors against temperatures,: YA = ± 5%, YB = ± 10%, YD = +20 − 30%, YE = +20 − 50% ( − 25 ~ +85 ° C), ZF = +30 − 80%, ( − 10 ~ +79 ° C), CH = 0 ±...
  • Page 19 LOC. PART NO. DESCRIPTION C268 RC005218 BCMM814091Z CERAMIC 4PF 50V C CH C270 RC005218 BCMM814091Z CERAMIC 4PF 50V C CH C274 RC005218 BCMM814091Z CERAMIC 4PF 50V C CH C275 RC005360 BCMM816092Z CERAMIC 6PF 50V D CH C275 Deleted C276 RC005218 BCMM814091Z CERAMIC 4PF 50V C CH...
  • Page 20 LOC. PART NO. DESCRIPTION C563 RC005360 BCMM816092Z CERAMIC 6PF 50V D CH C567* RC008752 BCML512735Z CERAMIC 0.027UF 25V K B C568 RC005218 BCMM814091Z CERAMIC 4PF 50V C CH C570 RC005218 BCMM814091Z CERAMIC 4PF 50V C CH C574 RC005218 BCMM814091Z CERAMIC 4PF 50V C CH C575 RC005360...
  • Page 21 LOC. PART NO. DESCRIPTION TRANSISTORS Q202* RC001081 BDBA1162107 DB-036 2SA1162-G(GR)TE85L Q204 Deleted Q206 RC008760 BDBC5065124 2SC5065-Y(TE85R) Q207 RC008760 BDBC5065124 2SC5065-Y(TE85R) Q209 Deleted Q212 RC008760 BDBC5065124 2SC5065-Y(TE85R) Q502 RC001081 BDBA1162107 DB-036 2SA1162-G(GR)TE85L Q504 Deleted Q506 RC008760 BDBC5065124 2SC5065-Y(TE85R) Q507 RC008760 BDBC5065124 2SC5065-Y(TE85R) Q509 Deleted...
  • Page 22 LOC. PART NO. DESCRIPTION R247 Deleted R248 Deleted R252 RC008765 BRFC161004Z CARBON FIXED CHIP 10 1/16W J TAPING R253 RC005673 BRFC163934Z CARBON FIXED CHIP 39K 1/16W J TAPING R254 RC005245 BRFC161834Z CARBON FIXED CHIP 18K 1/16W J TAPING R256 Deleted R257 RC005241 BRFC161034Z...

  • Page 23: Assembly Parts List

    PAPER Note: The part with * mark is newly added. 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 RC008745...

  • Page 24: Specifications

    SPECIFICATIONS Measurement Conditions Standard Voltage: DC 3.8 V ±0.025 V Handset Unit AC 120 V ±3 V 60 Hz Base Unit 25 °C ±5 °C Temperature: Channel: Portable (TX Frequency) Base (TX Frequency) 902.080435MHz 925.989636MHz 902.130671MHz 926.039871MHz 902.180906MHz 926.090107MHz 902.231142MHz 926.140342MHz 902.281377MHz 926.190577MHz...

  • Page 25: Base Unit

    Base Unit Receiver Unit Nominal Limit −115 < −107 Sensitivity 12dB SINAD (CCITT Filter ON) −1.5 −5.5 ~ +2.5 Frequency Response 0.3 kHz −3.5 −7.5 ~ +0.5 3.0 kHz Distortion at 1 mV RF Input < 5 S/N ratio at 1 mV RF Input (CCITT Filter ON, Compander ON) >...
  • Page 26 Telephone Line Unit Nominal Limit Off-hook Impedance (at 1 kHz) 1000 500 ~ 1500 Off-hook DC Resistance (DC 40 mA) 100 ~ 300 On-hook Impedance 20 Hz (75 Vrms) kohm > 10 Minimum Ringer Input Level < 40 Pulse Dialing a.
  • Page 27 Transmitter Unit Nominal Limit RF Power (50 Ω Load) −7 −10 ~ −4 Modulation Sensitivity 10.5 7 ~ 15 −1 −5 ~ +3 Frequency Response 0.3 kHz −1.5 −5.5 ~ +2.5 3.0 kHz ±1500 Frequency Tolerance (25 °C) Code Deviation <...

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