Sony SPP-S2720 Service Manual
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Sony SPP-S2720 Service Manual

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SERVICE MANUAL
Ver 1.1 2001.08
General
Spread method
Direct-Sequence Spread-Spectrum
Access method
FDMA-TDD
Frequency band
2.4075 - 2.4720 GHz
Operating channel
40 channels
Dial signal
Tone, 10 PPS (pulse) selectable
Supplied accessories
AC power adaptor (AC-T46)
Telephone line cord
Rechargeable battery pack (BP-T38)
Cordless handset
Power source
Rechargeable battery pack BP-T38
Battery life
Standby: Approx. 6 days
Talk:
Battery charging time
Approx. 12 hours
Dimensions
Approx. 2
antenna excluded
(approx. 58 x 166 x 48 mm)
Antenna: Approx. 2
(approx. 72 mm)
Mass
Approx. 8.1 oz
(approx. 230 g), battery included
Sony Corporation
9-873-166-02
2001H0500-1
Personal Audio Company
C 2001.8
Shinagawa Tec Service Manual Production Group
SPECIFICATIONS
Approx. 5 hours
3
5
15
⁄
x 6
⁄
x 1
⁄
inches (w/h/d),
8
8
16
7
⁄
inches
8
SPP-S2720
Base unit
Power source
DC 9V from AC power adaptor
AC-T46
Dimensions
1
5
Approx. 6
⁄
x 2
⁄
x 6 inches (w/h/d),
8
8
antenna excluded
(approx. 154 x 65 x 151 mm)
3
Antenna: Approx. 4
⁄
inches
8
(approx. 108 mm)
Mass
Approx. 9.4 oz
(approx. 265 g)
Design and specifications are subject to
change without notice.
CORDLESS TELEPHONE
US Model
Canadian Model

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  • Page 1 SPP-S2720 SERVICE MANUAL US Model Canadian Model Ver 1.1 2001.08 SPECIFICATIONS General Base unit Spread method Power source Direct-Sequence Spread-Spectrum DC 9V from AC power adaptor Access method AC-T46 FDMA-TDD Dimensions Frequency band Approx. 6 ⁄ ⁄ x 6 inches (w/h/d), antenna excluded 2.4075 - 2.4720 GHz...

  • Page 2: Table Of Contents

    OPERATION. REPLACE THESE COMPONENTS WITH DE FONCTIONNEMENT. NE REMPLACER CES COM- SONY PARTS WHOSE PART NUMBERS APPEAR AS POSANTS QUE PAR DES PIÈCES SONY DONT LES SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- NUMÉROS SONT DONNÉS DANS CE MANUEL OU LISHED BY SONY.

  • Page 3: Servicing Notes

    SPP-S2720 SECTION 1 SERVICING NOTES IF AN ERROR MESSAGE IS DISPLAYED (Handset) If the following error message is displayed after the power was turned on, check the items where “1” is indicated. [][] ERROR= EEPROM (IC122) data error t Write correct data to the EEPROM.
  • Page 4 SPP-S2720 Ver 1.1 EASY CHECK MODE (Base unit only) This mode is simple mode for easy check. For detail confirmation, execute the test mode. (Refer to “4. TEST MODE” on page 14) Setting Location: Easy check mode flow: – SET BOTTOM VIEW –...
  • Page 5 SPP-S2720 Ver 1.1 4. Automatic Hold Canceling Check Note: In this mode, this set is operating as follow. [HANDSET LOCATOR] • When key is pressed, outputs the dial pulse 1 to the line substitute for key touch-tone. • Close the line.

  • Page 6: General

    SPP-S2720 SECTION 2 This section is extracted from instruction manual. GENERAL Identifying the parts Refer to the pages indicated in parentheses for details. Base unit 1 VOICE MAIL lamp (p. 59) 4 CHARGE lamp (p. 14) Flashes, noticing that you have...
  • Page 7 SPP-S2720 6 Antenna (p. 12) 7 Hook for AC power adaptor cord (p. 12) 8 DC IN 9V jack (p. 12) 9 LINE (telephone line) jack (p. 12) continued Getting Started...
  • Page 8 SPP-S2720 Identifying the parts (continued) Cordless handset 1 Antenna 9 Jog Dial (p. 17, 37, 51) 2 Speaker 0 OFF button (p. 30, 36) Allows you to disconnect the call. 3 Display window (p. 30, 50) qa INTERCOM button (p. 48, 49) 4 TALK button (p.
  • Page 9 SPP-S2720 TONE button (p. 31) ql PGM (program) button (p. 17, 37) Allows you to switch temporarily to tone dialing. w; REDIAL/PAUSE button (p. 22, 33) qg RINGER Redials one of the last five numbers qh I (HEADSET) jack (p. 31, 35, 61) called/inserts a pause in the dialing sequence.

  • Page 10: Registering Additional Cordless Handsets

    SPP-S2720 Registering additional cordless handsets The phone system includes a cordless handset. You can expand the system including a total of four cordless handsets. Be sure to register the ID number of the additional cordless handset called “station number” to the base unit before using the additional cordless handset.
  • Page 11 SPP-S2720 Registering additional cordless handsets (continued) Enter the 10 digits system ID by pressing the dialing keys. The system ID is shown on a sticker affixed to the bottom of the base unit. Press (PGM). You hear a long confirmation beep and the assigned station number is displayed.

  • Page 12: Disassembly

    SPP-S2720 SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. 3-1. DISASSEMBLY FLOW Cabinet (rear) Hand Main Board Base Cabinet (lower) Assy, Key Main Board Base Main Board Note: Follow the disassembly procedure in the numerical order given.

  • Page 13: Base Cabinet (Lower) Assy, Key Main Board

    SPP-S2720 3-4. BASE CABINET (LOWER) ASSY, KEY MAIN BOARD 1 four screws (BTP3 × 10) 3 screws 6 base cabinet (lower) assy (BTP2.6 × 8) 5 KEY MAIN board 4 two claws 3-5. BASE MAIN BOARD 2 four screws (BTP2.6 × 8) 3 BASE MAIN board 1 Remove two solders.

  • Page 14: Test Mode

    SPP-S2720 SECTION 4 TEST MODE 2. TEST MODE C (TX Power Measurement Mode) BASE UNIT In the test mode idling status, press the key to active this mode and display “TEST C”. Note: To perform the test mode, prepare the panel (BASE CABINET (UP- 1.
  • Page 15 SPP-S2720 Enter the data associated with each address by referring to the 5. TEST MODE F (DSP Control Mode) “EEPROM data” in the following table. In the test mode idling status, press the key to active this mode and display “TEST F”.

  • Page 16: Handset

    SPP-S2720 1-2. Jog Test HANDSET 1. In the “TEST A” status, press the key to active the jog test and display as below. [ENTERING THE TEST MODE] display example 1. Connect the power. [ERASE] 2. Press three keys of , and simultaneously.
  • Page 17 F H-No. : Number of registered handset [PGM] M-No. : Number of model destination (SPP-S2720: 00h) check sum enter 5. TEST MODE B (Writing the ID number) reset Note: Though the “TEST MODE E” handles the ID numbers as hexa- decimal numbers, the “TEST MODE B”...

  • Page 18: Rf Testing

    SPP-S2720 Ver 1.1 Spectrum analyzer setting: RF TESTING Center frequency: 2440.5 MHz Span : 10 MHz This test is for checking the RF system without disassembling the : 100 kHz set in servicing. Perform measurement using the spectrum ana- : 100 kHz lyzer and jig antenna.
  • Page 19 SPP-S2720 Ver 1.1 REF –10.0 dBm MKR 2.44076 GHz Specifications: 10dB/ A_View Posi B_Blank Norm –14.52 dBm A (width of –6 dB points) : more than 1.4 MHz MARKER 2 . 4 4 0 7 6 GHz B (width of –20 dB points) : more than 1.8 MHz 1-3.

  • Page 20: Electrical Adjustments

    SPP-S2720 SECTION 5 ELECTRICAL ADJUSTMENTS Charge Current and CHARGE LED Test 0 dBm = 0.775 V Setting: BASE UNIT digital voltmeter Base unit • Make the set in the test mode. (See page 14) charge terminal 47 Ω/1W charge terminal Note: –...
  • Page 21 SPP-S2720 Between Microphone in The Handset and Line Sig- RX Current Measurement nal Level Measurement Setting: Setting: Handset feeding bridge Base unit Line TP101 RF61 Line TP102 Trunk 600 Ω regulated dc Input audio analyzer RF271 power supply 1.2 kHz, –37 dBm...

  • Page 22: Handset

    SPP-S2720 Current Measurement HANDSET Setting: • Make the set in the test mode. (See page 16) Handset regulated dc power supply Power Failure Test Procedure: TP101 1. In the test mode idling status, press the key to display +3.8 V “TEST A”.
  • Page 23 SPP-S2720 RX Current Measurement Frequency Deviation Measurement Setting: Setting: Base unit antenna pick-up coil RF271 frequency counter – regulated dc RF61 power supply TP101 +3.8 V – TP102 (GND) Handset Procedure: (Use the panel for normal set) 1. Connect equipments as the figure above.
  • Page 24 SPP-S2720 Connecting Location: – BASE MAIN BOARD (Conductor Side) – – BASE MAIN BOARD (Component Side) – TP102 TP202 TP101 TP201 TP203 RF271 (RF UNIT) R276 TP306 (GND) R277 TP471 R446 R447 charge terminal – charge terminal + – HAND MAIN BOARD –...

  • Page 25: Diagrams

    SPP-S2720 SECTION 6 DIAGRAMS 6-1. BLOCK DIAGRAM – BASE UNIT Section – ANT101 (MAIN ANTENNA) ANT102 TEL LINE IC402 (SUB ANTENNA) • SIGNAL PATH B+ SWITCH F101 RF271 Q105 RF UNIT : RX D107 – 110 T101 MJ101 (DL0) L OUT...

  • Page 26: Block Diagram - Handset Section

    SPP-S2720 6-2. BLOCK DIAGRAM – HANDSET Section – CODEC ANT201 RF61 (ANTENNA) RF UNIT MUTING PCMRO PCMRI VFRO ATTENUATOR AF AMP RXAD PCM L. P. F. EXPANDER CONVERTER 8 ANT ADPCM (SPEAKER) PCMSI PCMSO AIN– MIC AMP MIC1 TXAD PCM B.

  • Page 27: Note For Printed Wiring Boards And Schematic Diagrams

    SPP-S2720 6-3. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS • Waveforms – HAND MAIN Board – – BASE MAIN Board – Note on Printed Wiring Board: Note on Schematic Diagram: 1 IC301 tk (CF2) 3 IC1 wl (BCLK) • All capacitors are in µF unless otherwise noted. pF: µµF •...

  • Page 28: Printed Wiring Board

    SPP-S2720 6-4. PRINTED WIRING BOARD – BASE MAIN Board (Component Side) – • See page 23 for Note on Printed Wiring Board. • Semiconductor Location ANT101 Ref. No. Location BASE MAIN BOARD (COMPONENT SIDE) (MAIN ANTENNA) IC102 IC302 IC303 IC402...

  • Page 29: Printed Wiring Boards - Base Main (Conductor Side)/Key Main Boards

    SPP-S2720 Ver 1.1 6-5. PRINTED WIRING BOARDS – BASE MAIN (Conductor Side)/KEY MAIN Boards – • See page 23 for Note on Printed Wiring Board. J201 5 3 1 2 4 6 MJ101 – ANT102 LINE DC IN 9V ANTENNA...

  • Page 30: Schematic Diagram - Base Main (1/3)/Key Main Boards

    SPP-S2720 6-6. SCHEMATIC DIAGRAM – BASE MAIN (1/3)/KEY MAIN Boards – • • See page 23 for Waveform. See page 23 for Note on Schematic Diagram. TP107 R122 100k CN301 R337 R334 R333 R335 4.7M 4.7k R346 R336 Q301 C318...

  • Page 31: Schematic Diagram - Base Main Board (2/3)

    SPP-S2720 6-7. SCHEMATIC DIAGRAM – BASE MAIN Board (2/3) – • See page 23 for Note on Schematic Diagram. (Page 30) Q105 2SA1576A-T106-QR TP105 TEL LINE R193 B+ SWITCH R106 R110 R111 C119 R112 4.7k 1/2W C109 C113 C131 C138...

  • Page 32: Schematic Diagram - Base Main Board (3/3)

    SPP-S2720 6-8. SCHEMATIC DIAGRAM – BASE MAIN Board (3/3) – • • See page 23 for Waveform. See page 23 for Note on Schematic Diagram. (Page 30) C462 1000p TP425 C402 R417 C401 TP424 R411 R410 R416 0µH L404 JC401...
  • Page 33 SPP-S2720 • IC Block Diagrams – HAND MAIN Board – ML7079MBZ020 BCLK SYNC AIN – 3 – PCMSO B. P. F. CONVERTER COMPRESSOR NC 4 20kΩ VREF PCMSI NC 6 ADPCM NC 8 PCMRO VFRO L. P. F. PCMRI CONVERTER EXPANDER 20kΩ...

  • Page 34: Printed Wiring Board - Hand Main Board

    SPP-S2720 6-9. PRINTED WIRING BOARD – HAND MAIN Board – • See page 23 for Note on Printed Wiring Board. HAND MAIN BOARD (COMPONENT SIDE) BZ101 6 54 CHARGE TERMINAL 1 23 TP5 (MIC GND) ANT201 MIC1 1-682-517- (11) D122 – 128 (SPEAKER) D125 –...

  • Page 35: Schematic Diagram - Hand Main Board (1/2)

    SPP-S2720 6-10. SCHEMATIC DIAGRAM – HAND MAIN Board (1/2) – • • See page 23 for Waveforms. • See page 29 for IC Block Diagrams. See page 23 for Note on Schematic Diagram. RF61 (RF UNIT) 1000 6.3V TP62 ANT201...

  • Page 36: Schematic Diagram - Hand Main Board (2/2)

    SPP-S2720 6-11. SCHEMATIC DIAGRAM – HAND MAIN Board (2/2) – • • See page 29 for IC Block Diagram. See page 23 for Note on Schematic Diagram. CN121 8.2nH 8.2nH 8.2nH C131 C132 R139 C133 LCD201 C134 R140 R141 LIQUID...

  • Page 37: 6-12. Ic Pin Function Description

    SPP-S2720 6-12. IC PIN FUNCTION DESCRIPTION • BASE MAIN BOARD IC301 SB875064W-5W61 (SYSTEM CONTROLLER) Description Pin No. Pin Name SS SPI CLK Serial data transfer clock signal output to the RF unit (RF271) Two-way data bus with the liquid crystal display module Not used (open) Chip select signal output to the liquid crystal display module “L”...
  • Page 38 SPP-S2720 Description Pin No. Pin Name Not used (open) Watch dog timer reset signal input terminal “H”: reset Not used (fixed at “L”) RING DET Detection signal input of the ringer coming “L”: ringer coming Power fail detection signal input “L”: power fail...
  • Page 39 SPP-S2720 • BASE MAIN BOARD IC402 DL16121B11AQC (DSP) Description Pin No. Pin Name AGPIO5 to 1 to 11 Not used (open) AGPIO15 — Power supply terminal (+5V) — Ground terminal EGPIO0 to 14 to 19 Not used (open) EGPIO5 EGPIO6 Not used (fixed at “L”)
  • Page 40 SPP-S2720 Pin No. Pin Name Description Chip enable signal output to the flash memory “L” active FCSN0 Not used (open) GPIO1 Not used (open) HCSN1 Chip select signal input from the system controller (IC301) “L” active Address latch enable signal output to the flash memory...
  • Page 41 SPP-S2720 • HAND MAIN BOARD IC121 SH875048W-5W62 (SYSTEM CONTROLLER) Pin No. Pin Name Description SS SPI CLK Serial data transfer clock signal output to the RF unit (RF61) LCD SDA Two-way data bus with the liquid crystal display module (LCD201) LCD CS Chip select signal output to the liquid crystal display module (LCD201) “L”...
  • Page 42 SPP-S2720 Pin No. Pin Name Description DIS CHG Wakeup control signal output “L” output when discharge (WAKE UP) Watch dog timer reset signal input terminal “H”: reset Not used (fixed at “L”) WAKE UP Wakeup control signal input “H”: wakeup...

  • Page 43: Exploded Views

    SPP-S2720 SECTION 7 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark 0 are may have some difference from the original are seldom required for routine service.

  • Page 44: 7-2. Base Set

    SPP-S2720 7-2. BASE SET ANT102 ANT101 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 51 1-682-656-11 KEY MAIN BOARD 3-230-652-01 STOPPER (ANTENNA) 3-231-626-01 BUTTON (H/L) 3-936-696-21 FOOT, RUBBER 3-231-624-01 CABINET (UPPER) ANT101 1-754-194-11 ANTENNA (MAIN)

  • Page 45: Electrical Parts List

    SPP-S2720 SECTION 8 ELECTRICAL PARTS LIST BASE MAIN NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by 0 or dotted line with mark mark parts list may be different from the parts speci- are seldom required for routine service.
  • Page 46 SPP-S2720 BASE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D109 8-719-970-02 DIODE RL1N4004-FW 0 PH102 8-749-015-01 PHOTO COUPLER K817P6 D110 8-719-970-02 DIODE RL1N4004-FW < TRANSISTOR > D111 8-719-991-33 DIODE 1SS133T-77 D114 8-719-160-55 DIODE RD12FB1...
  • Page 47 SPP-S2720 BASE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R203 1-215-857-11 METAL OXIDE R370 1-216-845-11 METAL CHIP 100K 1/16W R251 1-216-814-11 METAL CHIP 1/16W R252 1-216-357-00 METAL OXIDE R371 1-216-845-11 METAL CHIP 100K 1/16W...
  • Page 48 SPP-S2720 HAND MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3021-511-A HAND MAIN BOARD, COMPLETE 1-126-206-11 ELECT CHIP 100uF 6.3V 1-162-970-11 CERAMIC CHIP 0.01uF ************************** 1-162-970-11 CERAMIC CHIP 0.01uF 3-230-755-01 TERMINAL (HAND), CHARGE C101 1-162-964-11 CERAMIC CHIP 0.001uF...
  • Page 49 SPP-S2720 HAND MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Q121 8-729-026-53 TRANSISTOR 2SA1576A-T106-QR < JUMPER RESISTOR > Q122 8-729-026-53 TRANSISTOR 2SA1576A-T106-QR 1-216-296-11 SHORT < RESISTOR > 1-216-296-11 SHORT 1-216-864-11 METAL CHIP 1/16W 1-216-821-11 METAL CHIP...
  • Page 50 SPP-S2720 HAND MAIN KEY MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R103 1-216-839-11 METAL CHIP 1/16W < RF UNIT > R104 1-216-845-11 METAL CHIP 100K 1/16W R105 1-216-817-11 METAL CHIP 1/16W RF61 1-476-334-21 RF UNIT...
  • Page 51 SPP-S2720 MEMO...

  • Page 52: Revision History

    SPP-S2720 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. Date Description of Revision 2001.08...

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