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SERVICE MANUAL
Ver 1.0 2000. 09
General
Frequency band
902 - 928 MHz
Operating channel
30 channels
Dial signal
Tone, 10 PPS (pulse) selectable
Supplied accessories
AC power adaptor (AC-T130)
Telephone line cords (2)
Wall bracket for base unit
Rechargeable battery pack (BP-T23)
Handset
Power source
Rechargeable battery pack BP-T23
Battery charging time
Approx. 10 hours
Battery life
Standby: Approx. 6 days
Talk:
Dimensions
Approx. 56 x 183 x 43 mm (w/h/d),
antenna excluded
(approx. 2
Antenna: Approx. 32 mm
(approx. 1
Mass
Approx. 230 g
(approx. 8 oz), battery included
SPECIFICATIONS
Approx. 7 hours
1
1
3
x 7
x 1
inches)
4
4
4
1
inches)
4
CORDLESS TELEPHONE WITH ANSWERING SYSTEM
SPP-A941
Base unit
Power source
DC 9V from AC power adaptor
AC-T130
Battery charging time
Approx. 24 hours
Dimensions
Approx. 155 x 60 x 220 mm (w/h/d),
antenna excluded
1
3
3
(approx. 6
x 2
x 8
inches)
8
8
4
Antenna: Approx. 120 mm
3
(approx. 4
inches)
4
Mass
Approx. 520 g
(approx. 1 lb 2 oz), wall bracket excluded
Answering machine
Maximum recording time
About 15 minutes, using incorporated IC
Greeting message
Up to 90 seconds per each
Incoming and Memo message
Up to 4 minutes per message
Design and specifications are subject to
change without notice.
Mexican Model

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   Summary of Contents for Sony SPP-A941

  • Page 1 SPP-A941 SERVICE MANUAL Mexican Model Ver 1.0 2000. 09 SPECIFICATIONS General Base unit Frequency band Power source 902 - 928 MHz DC 9V from AC power adaptor Operating channel AC-T130 30 channels Battery charging time Dial signal Approx. 24 hours...
  • Page 2: Table Of Contents

    Telephone Features ............6 AND IN THE PARTS LIST ARE CRITICAL TO SAFE Answering Machine Features ......... 7 OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS DISASSEMBLY SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- ............11 LISHED BY SONY.
  • Page 3: General

    SECTION 1 This section is extracted from instruction manual. GENERAL Identifying the parts Identifying the parts (continued) Refer to the pages indicated in parentheses for details. Base Unit Handset 6 REPEAT/SLOW button 1 Message counter (p. 29) (p. 30) Indicates the number of new messages recorded.
  • Page 4: Setting Up The Base Unit

    Step 2 Setting up the base unit Connect the base unit If you want to hang the base unit on the wall, see page 37. Do the following steps: • Choose the best location • Connect the base unit • Choose the dialing mode Choose the best location Where you place the base unit affects the reception quality of the handset.
  • Page 5: Making Calls

    If the battery lasts only a few minutes even after 10 hours of charging, The TALK/BATT LOW lamp the usable life of the battery has expired and needs replacement. goes off. Contact your local Sony authorized dealer or service center, and ask for a Sony BP-T23 rechargeable battery pack. Note Additional tasks Battery life may vary depending on usage condition and ambient temperature.
  • Page 6: Telephone Features

    Telephone Features Speed dialing Speed dialing (continued) You can dial with a touch of a few buttons by storing a phone number To store the previous number dialed on a dialing button. You can store up to 10 different phone numbers. Press (REDIAL/PAUSE) directly after step 2, then go to step 4.
  • Page 7: Answering Machine Features

    Answering Machine Features Setting up the answering machine Paging You can page the handset from the base unit. Setting the time and day of the week Note that you cannot page if the handset is in use. Press (MENU) repeatedly until To Page you hear “Set day and time”.
  • Page 8: Setting The Number Of Rings

    Setting up the answering machine (continued) Setting the number of rings Setting the audible message alert You can select the number of times the phone rings before it answers You have the option of having a beep tell you if you have received any to take a message.
  • Page 9: Adjusting The Speaker Volume

    Selecting the Announcement Only Mode Adjusting the speaker volume To adjust the speaker volume, press (VOLUME)(+) or (-). You can set the answering machine to play the greeting without recording incoming messages (announcement only mode). You might want to select this mode when, for example, you expect to be away for a while and you cannot pick up messages.
  • Page 10: Operating From An Outside Phone

    Operating from an outside phone Operating from an outside phone (continued) Setting the remote ID code (security code) Picking up new messages To operate the answering machine from a touch-tone phone while you Call your telephone number from a touch-tone phone. are away from home, you need to set the remote ID code (security When you hear the greeting, press (#) and enter your remote ID code code).
  • 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 5. MOD Deviation Adjustment 0 dBm = 0.775 V 1. Connect the RF generator to TP (ANT) on the MAIN RF unit. 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 UNIT (Side A) – TP (ANT) – BASE MAIN BOARD (Component Side) – – BASE MAIN BOARD (Conductor Side) – DEMOD Audio Level Adjustment MOD Deviation Adjustment TX Frequency Adjustment TONE TP15 (RX LOOP VOLTAGE) PULSE TP14 (TX LOOP VOLTAGE) –...
  • Page 16: Handset

    Adjustment Location: HANDSET – HAND RF UNIT – Adjustment Equipment and Connection (Side B) HAND RF Unit TP (ANT) generator TP (ANT) HAND MAIN Board audio TP (RECEIVER +)or generator TP (MIC IN) digital voltmeter DC 3.6 V Setting: 1. Enter the test mode. (refer to page 13) 2.
  • Page 17: Diagrams

    SPP-A941 SECTION 5 DIAGRAMS 5-1. BLOCK DIAGRAM – BASE UNIT Section – ANT1 COMPRESSOR, EXPANDER, (ANTENNA) V REG B+ NOISE GATE LINE (RX PWR B+) LINE DEMOD TRANSFORMER AUDIO LEVEL FIL2 FIL2 BUFFER EXPANDER BUFFER RX AUDIO D9 – 12...
  • Page 18: Block Diagram - Handset Section

    SPP-A941 5-2. BLOCK DIAGRAM – HANDSET Section – L (LOW) M (MEDIUM) COMPRESSOR, EXPANDER, H (HIGH) NOISE GATE ANT2 R113 (ANTENNA) RX PWR B+ DEMOD AUDIO LEVEL FIL2 FIL2 RX PWR ROIN BUFFER EXPANDER RX AUDIO U5 (4/4) EMPHASIS CIRCUIT...
  • Page 19: Note For Printed Wiring Boards And Schematic Diagrams

    5-3. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS • IC Block Diagrams U6 KA8602D (BASE MAIN Board) Note on Printed Wiring Board: Note on Schematic Diagram: • X : parts extracted from the component side. • All capacitors are in µF unless otherwise noted. pF: µµF •...
  • Page 20: Printed Wiring Board - Base Main Board

    SPP-A941 5-4. PRINTED WIRING BOARD – BASE MAIN Board – • See page 21 for Note on Printed Wiring Board. • Semiconductor Location BASE MAIN BOARD Ref. No. Location B-12 I-12 R104 R111 B C E CHARGE TERMINAL I-10 LINE...
  • Page 21: Schematic Diagram – Base Main Board

    SPP-A941 5-5. SCHEMATIC DIAGRAM – BASE MAIN Board – • • • See page 27 for Waveform. See page 22 for IC Block Diagrams. See page 21 for Note on Schematic Diagram. (Page 29) – 25 – – 26 –...
  • Page 22: Printed Wiring Board - Base Key Board

    SPP-A941 5-6. PRINTED WIRING BOARD – BASE KEY Board – • See page 21 for Note on Printed Wiring Board. • Waveforms – HAND MAIN Board – – BASE MAIN Board – BASE KEY BOARD 1 U1 wh (OSC2) 2 U3 wh (OSC2)
  • Page 23: Schematic Diagram - Base Key Board

    SPP-A941 5-7. SCHEMATIC DIAGRAM – BASE KEY Board – • See page 21 for Note on Schematic Diagram. (Page 26) – 29 –...
  • Page 24: Printed Wiring Board - Hand Main Board

    SPP-A941 5-8. PRINTED WIRING BOARD – HAND MAIN Board – • See page 21 for Note on Printed Wiring Board. HAND MAIN BOARD (SIDE A) HAND MAIN BOARD ANT2 (SIDE B) UNIT TALK/BATT LOW FLASH TALK CHANNEL 2 ABC 3 DEF...
  • Page 25: Schematic Diagram – Hand Main Board

    SPP-A941 5-9. SCHEMATIC DIAGRAM – HAND MAIN Board – • • See page 27 for Waveform. • See page 22 for IC Block Diagrams. See page 21 for Note on Schematic Diagram. – 31 – – 32 –...
  • Page 26: 5-10. Ic Pin Function Description

    5-10. IC PIN FUNCTION DESCRIPTION • BASE MAIN BOARD U1 LSC527737DW-A94100FB (SYSTEM CONTROLLER) • HAND MAIN BOARD U3 LSC526609DW (SYSTEM CONTROLLER) Pin No. Pin Name Description Pin No. Pin Name Description System reset signal input from the reset signal generator (Q2, 3) “L”: reset System reset signal input from the LP2953IM (U11) “L”: reset RESET RESET...
  • Page 27: 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 28 (2) BASESET SECTION ANT1 (including zA) supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-041-534-01 FOOT, RUBBER * 61 A-3672-914-A RF UNIT (BASE) 3-042-404-01 BASE (BOTTOM), CABINET * 63 A-3673-087-A BASE MAIN BOARD, COMPLETE * 53 1-676-810-11 BASE KEY BOARD * 64...
  • Page 29: Electrical Parts List

    BASE KEY SECTION 7 ELECTRICAL PARTS LIST BASE MAIN NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by 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 30 BASE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 8-719-911-55 DIODE U05G 8-719-911-55 DIODE U05G < RESISTOR > 8-719-911-55 DIODE U05G 8-719-911-55 DIODE U05G 1-218-675-11 RES, CHIP 1/16W 8-719-976-19 DIODE RLS-4148 1-216-570-11 METAL CHIP 1/16W 1-216-570-11 METAL CHIP 1/16W 1-801-730-11 VARISTOR...
  • Page 31 BASE MAIN HAND MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R142 1-218-702-11 METAL CHIP 2.7K 0.5% 1/16W 1-216-850-11 METAL CHIP 270K 1/16W R143 1-218-847-11 RES, CHIP 0.5% 1/16W 1-216-837-11 METAL CHIP 1/16W R149 1-216-821-11 METAL CHIP 1/16W 1-218-292-11 RES, CHIP 1/16W...
  • Page 32 HAND MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C109 1-107-826-11 CERAMIC CHIP 0.1uF 1-216-845-11 METAL CHIP 100K 1/16W 1-216-845-11 METAL CHIP 100K 1/16W C110 1-165-176-11 CERAMIC CHIP 0.047uF 1-216-818-11 METAL CHIP 1/16W C111 1-162-970-11 CERAMIC CHIP 0.01uF C112 1-162-968-11 CERAMIC CHIP...
  • Page 33 HAND MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R144 1-216-857-11 METAL CHIP 1/16W R145 1-218-915-11 RES, CHIP 620K 1/16W R146 1-216-857-11 METAL CHIP 1/16W R147 1-216-854-11 METAL CHIP 560K 1/16W <SWITCH> 1-771-811-11 SLIDE SWITCH (VOL) <...
  • Page 34 SPP-A941 Sony Corporation 2000I05023-1 9-927-600-31 Audio Entertainment Group Printed in Japan C 2000. 9 – 42 – Published by General Engineering Dept.

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