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Sony SPP-A941 Service Manual

Cordless telephone with answering system
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SPP-A941
SERVICE MANUAL
US Model
Canadian Model
Ver 1.1 1999. 11
SPECIFICATIONS
CORDLESS TELEPHONE
WITH ANSWERING SYSTEM
MICROFILM

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  • Page 1 SPP-A941 SERVICE MANUAL US Model Canadian Model Ver 1.1 1999. 11 SPECIFICATIONS CORDLESS TELEPHONE WITH ANSWERING SYSTEM MICROFILM...

  • Page 2: Table Of Contents

    DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- 5-3. Block Diagram – HANDSET Section – ......21 POSANTS QUE PAR DES PIÈCES SONY DONT LES 5-4. Note for Printed Wiring Boards and NUMÉROS SONT DONNÉS DANS CE MANUEL OU Schematic Diagrams ............
  • Page 3 SECTION 1 This section is extracted from instruction manual. GENERAL – 3 –...
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  • Page 11: Disassembly

    SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. HAND CABINET (REAR) 5 Remove the hand cabinet (rear) to direction of the arrow B . 4 claw 3 two claws 2 two screws (BTP3 × 12) 1 Remove the battery case lid to direction of the arrow A .
  • Page 12 CABINET BASE (BOTTOM) 2 claw 1 five screws (BTP3 × 12) 3 cabinet base (bottom) 2 claw BASE MAIN BOARD, BASE KEY BOARD 3 screw (P3 × 10) 5 base main board 1 three screws (P3 × 8) 2 three charge springs 4 harness 6 tone-pulse knob...

  • Page 13: Test Mode

    SECTION 3 TEST MODE BASE UNIT HANDSET 1. Entering the Test Mode 1. Entering the Test Mode [HANDSET LOCATOR] 1. While pressing the key, turn the 1. Press two keys of simultaneously. [DIAL MODE] power ON, then change over the switch from 2.

  • Page 14: Electrical Adjustments

    SECTION 4 ELECTRICAL ADJUSTMENTS 6. MOD Deviation Adjustment 0 dBm = 0.775 V 1. Connect the RF generator to TP (ANT) on the MAIN RF board. 0 dBv = 1 V 2. Connect the audio generator (to feedback bridge) to LINE jack (J7) on the BASE MAIN board.
  • Page 15 Adjustment Location: – BASE RF BOARD (Side A) – TP (ANT) Quad-Voltage Adjustment – BASE MAIN BOARD (Component Side) – – BASE MAIN BOARD (Conductor Side) – DEMOD Audio Level Adjustment MOD Deviation Adjustment TX Frequency Adjustment T (Tone) TP15 (RX LOOP VOLTAGE) P (Pulse) TP14 (TX LOOP VOLTAGE) TP16 (RX AUDIO)

  • Page 16: Handset

    Adjustment Location: HANDSET – HAND RF BOARD – Adjustment Equipment and Connection (Side B) HAND RF Board TP (ANT) generator TP (ANT) HAND MAIN Board audio TP (RECEIVER +)or generator TP (MIC IN) Quad-Voltage digital TP (RX AUDIO) Adjustment voltmeter DC 3.6 V Setting: 1.

  • Page 17: Diagrams

    SPP-A941 SECTION 5 DIAGRAMS 5-1. BLOCK DIAGRAM – BASE UNIT Section (1/2) – QUAD-VOLTAGE MIX, OSC, LIMITER AMP, DET DEMOD AUDIO LEVEL 926.25MHz 10.7MHz 926MHz LIM1 LIM1 LIM2 FIL2 FIL2 10.7MHz A1IN 10.7MHz B.P.F. RF AMP LIMITER LIMITER BUFFER EXPANDER...

  • Page 18: Block Diagram – Base Unit Section (2/2)

    SPP-A941 5-2. BLOCK DIAGRAM – BASE UNIT Section (2/2) – ANSWER MAIL BOX ON/OFF B+ SWITCH 7 SEGMENTS LED (FOR LEDS) (+3V) (MESSAGE COUNTER) 3 4 5 6 7 SEGMENTS 7 SEGMENTS LED DRIVE LED DRIVE KEY MATRIX KP0 – 2, 10 – 12, 20, 22 KP30, 31, 40 –...

  • Page 19: Block Diagram - Handset Section

    SPP-A941 5-3. BLOCK DIAGRAM – HANDSET Section – L (LOW) QUAD-VOLTAGE MIX, OSC, LIMITER AMP, DET M (MEDIUM) H (HIGH) R113 DEMOD AUDIO LEVEL 903.65MHz 10.7MHz 903MHz LIM1 LIM1 LIM2 FIL2 FIL2 A1IN 10.7MHz 10.7MHz B.P.F. RF AMP LIMITER LIMITER...

  • Page 20: Note For Printed Wiring Boards And Schematic Diagrams

    SPP-A941 5-5. PRINTED WIRING BOARD – BASE RF Board – 5-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS Note on Printed Wiring Board: • X : parts extracted from the component side. • Y : parts extracted from the conductor side.

  • Page 21: Schematic Diagram – Base Rf Board

    SPP-A941 5-6. SCHEMATIC DIAGRAM – BASE RF Board – • See page 43 for IC Block Diagrams. (Page 30) – 25 – – 26 –...

  • Page 22: Printed Wiring Board - Base Main Board

    SPP-A941 5-7. PRINTED WIRING BOARD – BASE MAIN Board – • Semiconductor Location BASE MAIN BOARD Ref. No. Location B-12 R140 R104 CHARGE TERMINAL R143 B C E EC137 I-10 B C E EC134 C131 LINE – R138 I-14 EC132...

  • Page 23: Schematic Diagram – Base Main Board

    SPP-A941 5-8. SCHEMATIC DIAGRAM – BASE MAIN Board – • See page 31 for Waveform. • See page 43 for IC Block Diagrams. (Page 26) (Page 33) (Page 33) (Page 36) – 29 – – 30 –...

  • Page 24: Printed Wiring Board - Base I-Tad Board

    SPP-A941 • Waveforms 5-9. PRINTED WIRING BOARD – BASE I-TAD Board – – HAND MAIN Board – – BASE MAIN Board – 1 U1 wj (OSC1) 3 U3 wj (OSC1) (SIDE A) I-TAD BOARD 4 Vp-p 5 Vp-p TC10 250 ns 250 ns –...

  • Page 25: Schematic Diagram - Base I-Tad Board

    SPP-A941 5-10. SCHEMATIC DIAGRAM – BASE I-TAD Board – • See page 31 for Waveform. (Page 30) (Page 30) – 33 – – 34 –...

  • Page 26: Printed Wiring Board - Base Key Board

    SPP-A941 5-11. PRINTED WIRING BOARD – BASE KEY Board – 5-12. SCHEMATIC DIAGRAM – BASE KEY Board – BASE KEY BOARD REC/MEMO KP2, LD1 ANSWER ON/OFF (MESSAGE COUNTER) ERASE VOLUME – KP42 KP41 KP40 TIME/SET SELECT MENU KP31 KP30 KP12, LD4...

  • Page 27: Printed Wiring Boards - Hand Rf/Main Boards

    SPP-A941 5-13. PRINTED WIRING BOARDS – HAND RF/MAIN Boards – • Semiconductor Location – HAND RF Board – Ref. No. Location HAND RF BOARD (SIDE A) HAND MAIN BOARD (SIDE A) HAND MAIN BOARD (SIDE B) R120 R132 TALK/BATT LOW...

  • Page 28: Schematic Diagram - Hand Rf Board

    SPP-A941 5-14. SCHEMATIC DIAGRAM – HAND RF Board – • See page 43 for IC Block Diagrams. (Page 42) – 39 – – 40 –...

  • Page 29: Schematic Diagram - Hand Main Board

    SPP-A941 5-15. SCHEMATIC DIAGRAM – HAND MAIN Board – • See page 31 for Waveform. • See page 44 for IC Block Diagrams. (Page 40) – 41 – – 42 –...
  • Page 30 • IC Block Diagrams TA31103F (BASE MAIN Board) TA31103F (HAND MAIN Board) U2765B-AFSG3 (BASE RF Board) U2765B-AFSG3 (HAND RF Board) 15 14 13 27 26 25 24 23 21 20 19 18 17 16 – ∆G – – SWITCH LOCAL OSC MUTE CONTROL BUFFER...

  • Page 31: Ic Pin Function Description

    5-16. IC PIN FUNCTION DESCRIPTION • BASE MAIN BOARD U1 LSC527738DW-A94100FB (SYSTEM CONTROLLER) Pin No. Pin Name Description System reset signal input from the reset signal generator (Q2, 3) “L”: reset RESET For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H” Interrupt request signal input terminal Not used (fixed at “H”) DTMF1 to 3 to 8...
  • Page 32 • BASE I-TAD BOARD U1 PCD6002-C (TAD) Pin No. Pin Name Description PSEN Not used (open) Not used (fixed at “L”) — Not used (open) 7SEG D1 LED drive signal output of the 7 Segments LED (U1) “L”: LED on 7SEG D2 LED drive signal output of the 7 Segments LED (U1) “L”: LED on LED SEL...
  • Page 33 Pin No. Pin Name Description MOUT2/FSC Not used Voltage detect signal input from voltage detect (Q1) VDD3V1 — Power supply terminal (+3V) (digital system) Setting terminal for the test mode Normally: fixed at “L” “H”: test mode RSTIN Reset signal input from the reset signal generator (Q3) “H”: reset SP EN Speaker output on/off control signal output to the speaker amp (U6) Serial data transfer clock signal output to the EEPROM (U3)
  • Page 34 • HAND MAIN BOARD U3 LSC526609DW (SYSTEM CONTROLLER) Pin No. Pin Name Description System reset signal input from the LP2953IM (U11) “L”: reset RESET For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H” Interrupt request signal input terminal 3 to 6 COL3 to COL0...

  • Page 35: Exploded Views

    SECTION 6 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they may have some difference from the original are seldom required for routine service. Some one. delay should be anticipated when ordering •...
  • Page 36 (2) BASESET SECTION ANT1 (including z A) supplied not supplied supplied not supplied supplied supplied MIC1 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-041-534-01 FOOT, RUBBER * 61 A-3672-914-A BASE RF BOARD, COMPLETE 3-042-404-01 BASE (BOTTOM), CABINET 4-356-741-11 SCREW, TAPPING (BIND 2X6) * 53 1-676-810-11 BASE KEY BOARD...

  • Page 37: Electrical Parts List

    SECTION 7 BASE I-TAD ELECTRICAL PARTS LIST NOTE: The components identified by • Due to standardization, replacements in the • Items marked “*” are not stocked since they mark 0 or dotted line with mark are seldom required for routine service. parts list may be different from the parts speci- 0 are critical for safety.
  • Page 38 BASE I-TAD BASE KEY BASE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-104-752-11 TANTALUM CHIP 33MF 1-135-201-11 TANTALUM CHIP 10uF 1-162-968-11 CERAMIC CHIP 0.0047uF 10% 1-162-968-11 CERAMIC CHIP 0.0047uF 10% 1-135-201-11 TANTALUM CHIP 10uF 1-165-128-11 CERAMIC CHIP 0.22uF TC10...
  • Page 39 BASE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark EC133 1-126-964-11 ELECT 10uF 1-216-819-11 METAL CHIP 1/16W EC134 1-115-868-11 ELECT 0.22uF 1-216-839-11 METAL CHIP 1/16W EC137 1-104-664-11 ELECT 47uF EC150 1-126-964-11 ELECT 10uF 1-216-725-11 RES, CHIP 1/10W 1-208-806-11 RES, CHIP 1/10W...
  • Page 40 BASE MAIN BASE RF Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-249-406-11 CARBON (SMALL)120 1/4W < VARIABLE RESISTOR > 1-216-833-11 METAL CHIP 1/16W 1-216-841-11 METAL CHIP 1/16W 1-237-517-21 RES, ADJ 5K 1-216-831-11 METAL CHIP 6.8K 1/16W 1-238-193-11 RES, ADJ 5K 1-216-841-11 METAL CHIP...
  • Page 41 BASE RF Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 8-729-923-31 TRANSISTOR 2SC4083-T106P 1-162-906-11 CERAMIC CHIP 1.5PF 0.25PF 50V 1-162-915-11 CERAMIC CHIP 10PF 0.5PF < RESISTOR > 1-162-907-11 CERAMIC CHIP 0.25PF 50V 1-162-912-11 CERAMIC CHIP 0.5PF 1-216-809-11 METAL CHIP 1/16W 1-162-923-11 CERAMIC CHIP...
  • Page 42 HAND MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3672-726-A HAND MAIN BOARD, COMPLETE 8-729-026-07 TRANSISTOR MMBT3906LT1 8-729-026-07 TRANSISTOR MMBT3906LT1 ************************** 8-729-026-07 TRANSISTOR MMBT3906LT1 < CAPACITOR > 8-729-230-49 TRANSISTOR 2SC2712-YG 1-164-227-11 CERAMIC CHIP 0.022uF 8-729-026-07 TRANSISTOR MMBT3906LT1 1-107-826-11 CERAMIC CHIP 0.1uF...
  • Page 43 HAND MAIN HAND RF Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R114 1-216-821-11 METAL CHIP 1/16W 1-162-923-11 CERAMIC CHIP 47PF R115 1-216-833-11 METAL CHIP 1/16W 1-162-906-11 CERAMIC CHIP 1.5PF 0.25PF 50V R116 1-216-848-11 METAL CHIP 180K 1/16W 1-162-923-11 CERAMIC CHIP...
  • Page 44 HAND RF Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < DIODE > 1-216-833-11 METAL CHIP 1/16W 8-719-820-71 DIODE 1SV214 1-216-833-11 METAL CHIP 1/16W 8-719-820-71 DIODE 1SV214 1-218-272-11 RES, CHIP 5.1K 1/16W 8-719-820-71 DIODE 1SV214 1-219-570-11 METAL CHIP 1/16W 1-216-829-11 METAL CHIP 4.7K...
  • Page 45 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark ACCESSORIES & PACKING MATERIALS ******************************** 1-418-832-11 ADAPTOR, AC (AC-T130) 1-528-769-11 BATTERY PACK (BP-T23) 1-696-453-21 CORD (WITH MODULAR PLUG) (LINE) (22cm) 1-696-454-11 CORD (WITH MODULAR PLUG) (LINE) (215cm) 3-012-379-11 CASE (WALL HOOK) 3-041-521-11 GUIDE, QUICK START (US) 3-041-521-21 GUIDE, QUICK START (CND) 3-041-522-11 CARD, REMOTE CONTROL (US)
  • Page 46 SPP-A941 Sony Corporation 99K0504-1 9-927-600-12 Personal Audio Division Company Printed in Japan C 1999. 11 – 60 – Published by General Engineering Dept.

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