1. Manuals
  2. Brands
  3. Toshiba Manuals
  4. Cordless Telephone
  5. FT-8259
  6. Service manual

Toshiba FT-8259 Service Manual

Cordless phone
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
FILE NO. 2B0-9906
SERVICE MANUAL
CORDLESS TELEPHONE
FT-8259
PUBLISHED IN JAPAN, Sep., 1999

Advertisement

Table of Contents
loading

Related Manuals for Toshiba FT-8259

Summary of Contents for Toshiba FT-8259

  • Page 1 FILE NO. 2B0-9906 SERVICE MANUAL CORDLESS TELEPHONE FT-8259 PUBLISHED IN JAPAN, Sep., 1999...

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS ......................1 OPERATING CONTROLS ......................2 ALIGNMENT PROCEDURE ......................3 BLOCK DIAGRAMS ........................7 SCHEMATIC DIAGRAMS ......................9 TROUBLESHOOTING HINTS ....................14 IC AND TRANSISTOR VOLTAGE CHART ................23 SEMICONDUCTOR LEAD IDENTIFICATION ................29 ELECTRICAL PARTS LOCATION ..................... 32 WIRING DIAGRAMS .........................

  • Page 3: Flash/Redial) Button

    OPERATING CONTROLS HANDSET CONTROLS AND FUNCTIONS ANTENNA LINE 2 LED (Orange) LINE 1 LED (Green) TALK/BATT LOW LED (Red) SPEED DIAL INDEX LINE 1 button TALK button TALK LINE1 LINE2 LINE 2 button BATT LOW SPEED DIAL INDEX TALK TONE button Dialpad (0~9, and # buttons) LINE1...

  • Page 4: Alignment Procedure

    ALIGNMENT PROCEDURE Base Unit BASE Unit AF GEN. Test Point Transmitter Section Power Meter Connections DC IN TEL Line 1kHz 77.5mV 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) Connect the AC adapter to the base unit while pressing the “...
  • 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) Connect the AC adapter to the base unit while pressing the “...
  • Page 6 Handset Unit Transmitter Section Connection HANDSET Unit AF GEN. Test Point Power Meter J603 Battery 1kHz 11mV 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 J603 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...
  • Page 9 Handset...

  • Page 10: Schematic Diagrams

    SCHEMATIC DIAGRAMS Base Unit, Main...
  • Page 11 Base Unit, Key...
  • Page 12 Handset...

  • Page 13: Troubleshooting Hints

    TROUBLESHOOTING HINTS 1. The bell does not ring. See 2. The bell does not ring When the INTCOM key of the & page does not ring. base is pressed, does the ringer on the handset ring? When the TEL SG is joined Check IC5 (Line1) or IC13 with the base to make bell (Line2) and TEL network...
  • Page 14 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 15 3. The base and handset cannot be connected. Check whether the base Check IC14 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 RT2, R69, R70,...
  • Page 16 Set the handset in the Check whether there is a Check RT603, R619, test mode 3, check 250 Hz data waveform at R632, R634, R635, whether deviation of the “MOD” of RF unit. R636 and C610. TX data is app. 8 kHz Dev.
  • Page 17 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 IC5. dial key of the handset. Check whether square wave- form from pin 89 (Line1) or pin 90 (Line2) of IC14 is fed.
  • Page 18 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. T h e 1 k H z , 1 1 m V s i n e Check Q608 and its wavefor m i s a p p l i e d t o peripheral circuit.
  • Page 19 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 20 8. Trouble with intercom mode. 8-1. The voice from the Base unit cannot be heard on the Handset. Check whether there is an Check MC1 and IC17. audio waveform on pin 4 of IC17. Check pin 8 of IC15. 8-2. The voice from the Handset cannot be heard on the Base unit. Check whether there is an Check IC15.
  • Page 21 9. Trouble with speakerphone mode. 9-1. The voice of the caller cannot be heard (INCOMING CALL). Check whether there is an Check IC8 (Line1) or IC15 audio waveform on pin 11 of (Line2). IC8 (Line1) or pin1 of IC15 (Line2). Check whether there is an Check IC7.

  • Page 22: 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 OPEN OPEN 0.2-4.9 0.2-4.9 PULSE OPEN OPEN OPEN...
  • Page 23 Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE OPEN OPEN OPEN OPEN OPEN OPEN 0.0-3.0 PULSE / -- 3.0-0.0 PULSE / -- 3.0-0.0 PULSE / -- IC10 0.0-3.0 PULSE / -- IC11 OPEN OPEN OPEN IC14 IC12...
  • Page 24 Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE 0.1-4.9 0.1-4.9 PULSE IC14 OPEN OPEN OPEN IC15 2.2Vp-p 2.2Vp-p SINE WAVE 1Vp-p 1Vp-p SINE WAVE 4.1Vp-p 4.1Vp-p OPEN(SIN) OPEN OPEN OPEN IC14 AVCC VREF IC17 0.0-3.8...
  • Page 25 Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE IC17 IC18 1Vp-p 1Vp-p SINE WAVE 0.5Vp-p 0.5Vp-p SINE WAVE IC181 OPEN Q181...
  • Page 26 Handset Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE 0.0-3.8 PULSE / -- 3.8-0.0 PULSE / -- IC602 0.0-1.3 PULSE / -- 0.0-3.8 0.0-3.0 PULSE / -- 0.0-2.5 PULSE / -- OPEN IC603 OPEN 3.8-0.0 0.0-3.8 PULSE...
  • Page 27 Unit[V] Unit[V] Ref. No. PIN STBY TALK NOTE Ref. No. PIN STBY TALK NOTE IC606 Q606 0.0-3.0 PULSE / -- 0.0-1.7 PULSE / -- 0.0-1.7 PULSE / -- Q608 0.0-1.5 PULSE / -- 0.3-0.8 PULSE / -- 0.0-1.5 PULSE / -- Q610 0.0-1.5 PULSE / --...

  • Page 28: Semiconductor Lead Identification

    SEMICONDUCTOR LEAD IDENTIFICATION Base Unit D2/D5/D7/D8/D13 D401/D406 : SML-310LT Q2/Q3/Q4/Q5/Q6/Q10/Q11/Q12 /D16/D17/D181 : 1N4148 D402/D403/D405 : SML-310MT /Q13/Q14/Q24/Q25/Q26 : 2SC1623 D3/D6 : HZ33-2 D404 :SML-310DT Q7 : 2SA812(M) D14 : HZ9A1 Q15 : 2SC2120 D15 : HZ6C3 Q181 : 2SC2714 Anode Cathode Anode Q16/Q23 : 2SD471...
  • Page 29 IC14 HD6432345 /TIOCC0/TCLKA/A /BACK/IRQ1 /TIOCD0/TCLKB/A /WAIT/IRQ2 /TIOCA1 /LWR/IRQ3 /TIOCB1/TCLKC /HWR /TIOCA2 /TIOCB2/TCLKD PF7/ /TxD0 /TxD1 EXTAL /RxD0 XTAL /RxD1 /SCK0/IRQ4 STBY /SCK1/IRQ5 WDTOVF /TIOCD3/TMCI0 /TIOCC3/TMRI0 /TIOCB3 /TIOCA3 IC17 IC181 IC18 MC3361CDR2 MC34018P TK11130SCL...
  • Page 30 Handset D602/D604 : RLS4148 D607 : 1SS337 D616 : CL-200G D608/D609 : HZK6C Cathode Anode Cathode Anode Cathode Anode Anode Q601/Q602/Q603/Q604/ Q608/Q610/Q611/Q614/Q615 : 2SC1623 Q605/Q606/Q613 : 2SA812(M) D617 : SML-311DT Q612 : 2SC2714 D618 : SML-310LT Anode Cathode B : Base E : Emitter C : Collector IC602...

  • Page 31: Electrical Parts Location

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

  • Page 34: Wiring Diagrams

    WIRING DIAGRAMS Base Unit...
  • Page 35 Handset...

  • Page 36: Exploded View And Mechanical Parts List

    EXPLODED VIEWS AND MECHANICAL PARTS LIST Base Unit SPEAKER KEY PCB ASSY MAIN PCB ASSY RF MODULE (BASE) ANTENNA...
  • Page 37 Base Unit LOC. REF. PART NO. DESCRIPTION RC005685 GNBZ157880Z BUTTON, FUNCTION RC008527 GCAS242729Z CASE, BOTTOM RC008528 GCAS242730B CASE, TOP RC008414 HTML442750Z CHARGE TERMINAL C5191(PBP) RC005608 RCUN451804Z CUSHION NEOPRENE RC002384 LFUT428079Z FOOT BUMPON SJ-5916 1.6T RC008902 RBLD451795Z HIMELON RC005689 LHDZ453179Z HOLDER, MIC RC005444 HHDS431080B HOLDER, SPEAKER...
  • Page 38 Handset RF MODULE (HANDSET) MAIN PCB ASSY...
  • Page 39 Handset LOC. REF. PART NO. DESCRIPTION RC008346 RBLD442400Z BLIND RC008340 GNBZ342334Z BUTTON, FUNCTION (COMP) RC008541 GCAS342761Z CASE, FRONT RC008338 GCAS242332Z CASE, REAR RC008342 HTML442336Z CHARGE TERMINAL C2680(BSP) RC008703 GCAS457897Z COVER ELASTOMER RC008702 GCAS357889Z COVER, BATTERY RC008347 RCUM441150Z CUSHION MOLTPRENE, 40*20*8 RC008348 RCUN442433Z CUSHION...

  • 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 RC005216 BCMM813304Z CERAMIC M/L (1608) TAPE 33PF 50V J CH RC005202 BCML311045Z CERAMIC M/L (1608) TAPE 0.1UF 16V K B RC005202 BCML311045Z CERAMIC M/L (1608) TAPE 0.1UF 16V K B RC005208 BCML814725Z CERAMIC M/L (1608) TAPE 0.0047UF 50V K B RC005102 BCAP814796Z...
  • Page 42 LOC. REF. PART NO. DESCRIPTION RC005275 BCML813925Z CERAMIC M/L (1608) TAPE 0.0039UF 50V K B RC008925 BCMF311040Z CERAMIC M/L (1608) TAPE 0.1UF 16V Z F RC004947 BCAP314706Z ELECTROLYTIC 47UF 16V M C-130 RC005205 BCML811035Z CERAMIC M/L (1608) TAPE 0.01UF 50V K B RC004945 BCAP111016Z ELECTROLYTIC...
  • Page 43 LOC. REF. PART NO. DESCRIPTION C150 RC005102 BCAP814796Z ELECTROLYTIC 4.7UF 50V M C-130 C151 RC005102 BCAP814796Z ELECTROLYTIC 4.7UF 50V M C-130 C152 RC004952 BCAP811096Z ELECTROLYTIC 1UF 50V M C-130 C153 RC004947 BCAP314706Z ELECTROLYTIC 47UF 16V M C-130 C154 RC004947 BCAP314706Z ELECTROLYTIC 47UF 16V M C-130 C155...
  • Page 44 LOC. REF. PART NO. DESCRIPTION C608 RC008754 BCMM813098Z CERAMIC M/L (1608) TAPE 3PF 50V B CH C609 RC008296 BCSH901006Z TANTALUM CHIP TAPE 10UF 6.3V M C-122 C610 RC008006 BCML811525Z CERAMIC M/L (1608) TAPE 0.0015UF 50V K B C613 RC005202 BCML311045Z CERAMIC M/L (1608) TAPE 0.1UF 16V K B C614...
  • Page 45 LOC. REF. PART NO. DESCRIPTION C658 RC005207 BCML813325Z CERAMIC M/L (1608) TAPE 0.0033UF 50V K B C659 RC005205 BCML811035Z CERAMIC M/L (1608) TAPE 0.01UF 50V K B C660 RC008319 BCSH904796Z TANTALUM CHIP TAPE 4.7UF 6.3V M C-122 C661 RC005202 BCML311045Z CERAMIC M/L (1608) TAPE 0.1UF 16V K B C662...
  • Page 46 LOC. REF. PART NO. DESCRIPTION FILTERS FT181 RC008279 BFLY0971001 CERAMIC FL-971 FFE1054NA11UXL FT182 RC008280 BFLY0977001 FL-977 LTFS455B5 FT601 RC008279 BFLY0971001 CERAMIC FL-971 FFE1054NA11UXL FT602 RC008280 BFLY0977001 FL-977 LTFS455B5 IC’s RC005471 BDEY1180003 TC4066BF(EL) RC008519 BDEY0703002 NJM2904M (TE3) RC008278 BDEY3870003 LA8633VU-TLM RC004636 BDEY2163001 TLP521-1 RC005471...
  • Page 47 LOC. REF. PART NO. DESCRIPTION TRANSISTORS RC003031 BDBC1623648 DB-380 2SC1623-L6 T1B RC003031 BDBC1623648 DB-380 2SC1623-L6 T1B RC003031 BDBC1623648 DB-380 2SC1623-L6 T1B RC003031 BDBC1623648 DB-380 2SC1623-L6 T1B RC003031 BDBC1623648 DB-380 2SC1623-L6 T1B RC008275 BDBA0812695 DB-035 2SA812(M)-M6A T1B RC003031 BDBC1623648 DB-380 2SC1623-L6 T1B RC003031 BDBC1623648 DB-380 2SC1623-L6 T1B...
  • Page 48 LOC. REF. PART NO. DESCRIPTION RC008091 BRFC165614Z CARBON FIXED CHIP 560 1/16W J TAPING RC005259 BRFC166814Z CARBON FIXED CHIP 680 1/16W J TAPING RC008030 BRFC165624Z CARBON FIXED CHIP 5.6K 1/16W J TAPING RC005261 BRFC168224Z CARBON FIXED CHIP 8.2K 1/16W J TAPING RC005260 BRFC166834Z CARBON FIXED CHIP...
  • Page 49 LOC. REF. PART NO. DESCRIPTION RC005242 BRFC161044Z CARBON FIXED CHIP 100K 1/16W J TAPING RC005248 BRFC162234Z CARBON FIXED CHIP 22K 1/16W J TAPING RC005248 BRFC162234Z CARBON FIXED CHIP 22K 1/16W J TAPING RC005311 BRFC160004Z CARBON FIXED CHIP 0 1/16W J TAPING RC005284 BRFC163334Z CARBON FIXED CHIP...
  • Page 50 LOC. REF. PART NO. DESCRIPTION R112 RC005248 BRFC162234Z CARBON FIXED CHIP 22K 1/16W J TAPING R113 RC005657 BRFC181064Z CARBON FIXED CHIP 10M 1/8W JTAPING R114 RC005256 BRFC164724Z CARBON FIXED CHIP 4.7K 1/16W J TAPING R115 RC005242 BRFC161044Z CARBON FIXED CHIP 100K 1/16W J TAPING R116 RC005241...
  • Page 51 LOC. REF. PART NO. DESCRIPTION R180 RC002295 BRFC011014Z CARBON FIXED CHIP 100 1/10W JTAPING R181 RC005257 BRFC164734Z CARBON FIXED CHIP 47K 1/16W J TAPING R182 RC005257 BRFC164734Z CARBON FIXED CHIP 47K 1/16W J TAPING R183 RC005311 BRFC160004Z CARBON FIXED CHIP 0 1/16W J TAPING R184 RC005256...
  • Page 52 LOC. REF. PART NO. DESCRIPTION R241 RC005240 BRFC161024Z CARBON FIXED CHIP 1K 1/16W J TAPING R242 RC005281 BRFC162224Z CARBON FIXED CHIP 2.2K 1/16W J TAPING R243 RC005284 BRFC163334Z CARBON FIXED CHIP 33K 1/16W J TAPING R244 RC005278 BRFC161244Z CARBON FIXED CHIP 120K 1/16W J TAPING R245 RC008306...
  • Page 53 LOC. REF. PART NO. DESCRIPTION R613 RC005248 BRFC162234Z CARBON FIXED CHIP 22K 1/16W J TAPING R614 RC005245 BRFC161834Z CARBON FIXED CHIP 18K 1/16W J TAPING R615 RC005247 BRFC162214Z CARBON FIXED CHIP 220 1/16W J TAPING R616 RC005283 BRFC162734Z CARBON FIXED CHIP 27K 1/16W J TAPING R617 RC005254...
  • Page 54 LOC. REF. PART NO. DESCRIPTION R663 RC005255 BRFC164714Z CARBON FIXED CHIP 470 1/16W J TAPING R664 RC005245 BRFC161834Z CARBON FIXED CHIP 18K 1/16W J TAPING R665 RC005281 BRFC162224Z CARBON FIXED CHIP 2.2K 1/16W J TAPING R666 RC005280 BRFC161534Z CARBON FIXED CHIP 15K 1/16W J TAPING R667 RC005258...
  • Page 55 LOC. REF. PART NO. DESCRIPTION W451 RC008418 CUQK008022Z WIRE W-005 UL 1571 #26 5- 80- 5 BLK W452 RC008532 CUQJ008022Z WIRE W-005 UL 1571 #26 5- 80- 5 WHT W601 RC008540 CZDZ072197Z WIRES ASSEMBLED W-072197 W801 RC008581 CUPB007011Z WIRE W-004 UL 1571 #26 3- 70- 3 RED W802 RC001338 CUQK007011Z...

  • Page 56: Assembly Parts List

    100×100×0.1T RC008423 VNYL3102500 VINYL BAG 100×250×0.1T 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 RC008545 AC230BLBA MAIN PCB ASSEMBLY, BASE...

  • Page 57: 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) 902.102465MHz 925.997470MHz 902.152465MHz 926.047470MHz 902.202465MHz 926.097470MHz 902.252465MHz 926.147470MHz 902.302465MHz...
  • Page 58 BASE UNIT RECEIVER UNIT NOMINAL LIMIT 1. Sensitivity 12 dB SINAD with CCITT Filter -115 < -107 2. Frequency Response (Ref:1kHz) 0.3kHz -3.5 -7.5~+0.5 3.0kHz -3.0 -7.0~+1.0 3. Distortion at 1 mV RF Input < 5 4. S/N ratio at 1 mV RF Input with CCITT Filter 60 <...
  • Page 59 PORTABLE UNIT RECEIVER UNIT NOMINAL LIMIT 1. Sensitivity 12 dB SINAD with CCITT Filter -115 < -107 2. Frequency Response (Ref:1kHz) 0.3kHz -2.0 -6.0~+2.0 3.0kHz -4.0 -8.0~0.0 3. Audio Output Level VOL. HIGH 211~334 VOL. MEDIUM 119~188 VOL. LOW 47~74 4.

Table of Contents