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Sony SPP-M937 Service Manual

2-line cordless telephone
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SERVICE MANUAL
Ver 1.0 2000.08
General
Frequency band
902 - 928 MHz
Operation mode
FM, duplex
Operating channel
30 channels
Dial signal
Tone, 10 PPS (pulse) selectable
Supplied accessories
AC power adapotor (AC-T122)
Handset
Telephone line cords (3)
Wall bracket for base phone
Rechargeable battery pack (BP-T23)
Directories (2)
Belt clip
Handset
Power source
Rechargeable battery pack BP-T23
Battery life
Standby: Approx. 7 days
Talk: Approx. 7 hours
Dimensions
Approx. 55 x 177 x 45 mm (w/h/d),
antenna excluded
SPP-M937
SPECIFICATIONS
1
(approx. 2
⁄
4
Antenna: Approx. 30 mm
(approx. 1 1 ⁄4 inches)
Mass
Approx. 250 g
(approx. 8.8 oz), battery included
Base phone
Power source
DC 9 V from AC power adaptor
Battery charging time
Approx. 12 hours
Dimensions
Approx. 187 x 66 x 225 mm
(w/h/d), antenna excluded
3
(approx. 7
⁄
8
Antenna : Approx. 150 mm
(approx. 6 inches)
Mass
Approx. 598 g (approx. 1 lb 5 oz)
Design and specifications are subject to change without notice.
2-LINE CORDLESS TELEPHONE
US Model
13
x 7 x 1
⁄
inches)
16
5
7
x 2
⁄
x 8
⁄
inches)
8
8

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  • Page 1 SPP-M937 SERVICE MANUAL US Model Ver 1.0 2000.08 SPECIFICATIONS General (approx. 2 ⁄ x 7 x 1 ⁄ inches) Frequency band Antenna: Approx. 30 mm 902 - 928 MHz (approx. 1 1 ⁄4 inches) Operation mode Mass FM, duplex Approx. 250 g Operating channel (approx.

  • Page 2: Table Of Contents

    2-2. Hand Main Board, Hand RF Board ......11 LIST ARE CRITICAL TO SAFE OPERATION. 2-3. Base bottom .............. 12 REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE 2-4. Base Top ..............12 PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN 2-5.
  • Page 3 SECTION 1 This section is extracted from GENERAL instruction manual. – 3 –...
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  • Page 11: Disassembly

    SECTION 2 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. Hand set Hand rear Hand main board Hand RF board Base unit Base bottom Base top Base main board, Base RF board, Base key board <HANDSET> 2-1.

  • Page 12: Base Bottom

    <BASE UNIT> 2-3. BASE BOTTOM Base top Base top Base bottom 2 Claw Base bottom 2 Claw 1 Screws (+P 3x12) 1 Screws (+P 3x12) 2-4. BASE TOP Base top Base main board 1 Screws (+P 2.6x16) 2 Screws (+BTP 2.6x8) –...

  • Page 13: Base Main Board, Base Rf Board, Base Key Board

    2-5. BASE MAIN BOARD, BASE RF BOARD, BASE KEY BOARD Base RF board 3 Remove solder (Conductor side) Base main board 5 Screws (+BTP 2.6x8) Base key board Base top – 13 –...

  • Page 14: Test Mode

    SECTION 3 TEST MODE 3-2. HANDSET 3-1. BASE UNIT [Start-up] [Start-up] 1. When powered up, pressing [PGM/SPEED DIAL] , [#], [9], [6], 1. When powered up, pressing [SPEED DIAL] , [#], [9] , [6] , and and [REDIAL/P AUSE] Key in order. [REDIAL/P AUSE] key in order.

  • Page 15: Base Unit Section

    SECTION 4 ADJUSTMENTS 4-1. BASE UNIT SECTION 3. RX LOOP VOLTAGE check Setting: • Make the set in Test Mode (See page 14) digital voltmeter 1. TX LOOP VOLTAGE check TP (RX LOOP VOLTAGE) Base Main Setting: – TP (GND) board digital voltmeter Precedure:...

  • Page 16: Handset Section

    4-2. HANDSET SECTION 3. RX LOOP VOLTAGE check Setting: • Make the set in Test Mode (See page 14) digital voltmeter 1. TX LOOP VOLTAGE check Setting J3 (RX LOOP VOLTAGE) Hand RF – TP (GND) board digital voltmeter Precedure: •...

  • Page 17: Diagrams

    SPP-M937 SECTION 5 DIAGRAMS 5-1. BLOCK DIAGRAM – BASE UNIT SECTION (1/2) – • SIGNAL PATH : RX : TX FIL2 FIL2 (Page 19) BUFFER EXPANDER BUFFER BASE RF BOARD RX AUDIO CIRCUIT U14 (2/4) U9 (1/2) ANT1 LOW-PASS PREAMP...

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

    SPP-M937 5-2. BLOCK DIAGRAM – BASE UNIT SECTION (2/2) – HOOK ON/OFF L1/L1+L2 RINGER U17 – 19 DETECT RING1 DET (Page 18) U19 (1/3) LINE SELECT SWITCH LINE 1 AF AMP TELEPHONE U5 (1/4), Q14 LINE 1 DETECT EXT DET1 –...
  • Page 19 SPP-M937 5-3. BLOCK DIAGRAM – HANDSET SECTION – (SPEAKER) SW23 FIL2 FIL2 VOLUME BUFFER EXPANDER RX AUDIO CONTROL HAND RF BOARD U5 (4/4) CIRCUIT SW23 ANT2 LOW-PASS PREAMP RO1/RO2 (ANTENNA) FILTER RX MUTE ATTENUATOR COMPRESSOR, EXPANDER, NOISE GATE LOW-PASS FILTER...
  • Page 20 SPP-M937 5-4. SCHEMATIC DIAGRAM – BASE MAIN SECTION (1/2) – Note: • All capacitors are in µF unless otherwise noted. pF: µµF • Voltages are dc with respect to ground in test mode. 50 WV or less are not indicated except for electrolytics •...
  • Page 21 SPP-M937 5-5. SCHEMATIC DIAGRAM – BASE MAIN SECTION (2/2) – Note: • All capacitors are in µF unless otherwise noted. pF: µµF Waveform 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and W or less unless otherwise specified.

  • Page 22: Printed Wiring Boards - Base Main Section

    SPP-M937 5-6. PRINTED WIRING BOARDS – BASE MAIN SECTION – L1/L1+L2 DATA DC IN 9V Semiconductor Location BASE MAIN BOARD (SIDE A) BASE MAIN BOARD (SIDE B) Ref. No. Ref. No. Location Location Ref. No. Location B-16 C-15 C-15 C-16...

  • Page 23: Schematic Diagram - Hand Main Section

    5-7. SCHEMATIC DIAGRAM – HAND MAIN SECTION – SPP-M937 Waveforms (HANDSET) 810 mVp-p 4MHz U6 qh XOUT VOLT/DIV : 0.2 V AC TIME/DIV : 1 µsec 812 mVp-p 32.768 µsec VOLT/DIV : 0.2 V AC U6 el XOUT TIME/DIV : 10 µsec Note: •...

  • Page 24: Printed Wiring Board - Hand Main Section

    SPP-M937 5-8. PRINTED WIRING BOARD – HAND MAIN SECTION – Semiconductor SPK2 RECHAGEABLE Location SPEAKER BATTERY PACK Ref. No. Location BP-T23 DC 3.6V 600mAh HAND MAIN BOARD (SIDE A) C102 C116 C103 R140 R121 C104 R133 C125 R109 C121 C106...

  • Page 25: Printed Wiring Board - Base Key Section

    SPP-M937 5-9. PRINTED WIRING BOARD – BASE KEY SECTION – 5-10. SCHEMATIC DIAGRAM – BASE KEY SECTION – BASE KEY BOARD SPK1 SPEAKER – – REDIAL/ SPEED DIAL PAUSE FLASH LED6 CHARGE LED3 INTERCOM HOLD CONF INTERCOM TALK S21,LED1 S24,LED2...

  • Page 26: Explanation Of Ic Terminals

    5-11. EXPLANATION OF IC TERMINALS HAND MAIN BOARD U6 TMP87PH47U-M937 (SYSTEM CONTROLLER) Pin No. Pin name Description PLL CLK Serial data transfer clock signal output. BEEP Buzzer sound drive signal output terminal. Detect signal input of the handset unit on cradle or off cradle “L”: on cradle, “H”: off ––––––––––––––––––––...
  • Page 27 BASE MAIN BOARD U2 TMP87PM53F-M937 (SYSTEM CONTROL) Pin No. Pin name Description — Ground terminal. XOUT Main system clock outut (4MHz). Main system clock input (4MHz). RESET System reset input. MIC MUTE Mic mute output. SPK MUTE Speaker mute output. —...
  • Page 28 Pin No. Pin name Description PLL DATA Serial data output to PLL and EEPROM. EEP CS Chip select signal output for EEPROM. DTMF 2 DTMF 2 signal output. — Not used (OPEN). –——–––––––––––––––– CONF CONF select signal output. INTCOM INTERCOM select signal output. SPK 1 EN Line 1 speaker on/off signal output.
  • Page 29 IC BLOCK DIAGRAMS U6 TA31103F (BASE MAIN SECTION) U7 TA31103F (HAND MAIN SECTION) 15 14 13 – ∆G – – SWITCH MUTE CONTROL PRE AMP VREF VREF – VREF THROUG VREF THROUG VREF COMP MUTE MIC AMP VREF FILTER FILTER IN 2 AMP 1 AMP 2...

  • Page 30: Exploded Views

    SECTION 6 EXPLODED VIEWS NOTE : • -XX, -X mean standardized parts, so they • The mechanical parts with no reference may have some difference from the original number in the exploded views are not one. supplied. • Items marked “ * ”are not stocked since they •...

  • Page 31: Base Unit Section

    6-2. BASE UNIT SECTION supplied SPK1 supplied ANT1 (including v A, v B) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 51 1-679-608-11 BASE KEY BOARD 3-041-534-01 FOOT, RUBBER 1-786-077-11 SWITCH, RUBBER KEY (BASE) A-3673-121-A BASE RF BOARD, COMPLETE 3-220-225-01 DIAL KEY SET BS 4-356-741-11 SCREW, TAPPING (BIND 2X6) 3-224-087-01 CONTACT, CHARGE...

  • Page 32: Electrical Parts List

    SECTION 7 BASE KEY BASE MAIN ELECTRICAL PARTS LIST NOTE : • Due to standardization, replacements in the • SEMICONDUCTORS In each case, u : µ , for example : The components identified by mark 0 parts list may be different from the parts or dotted line with mark 0 are critical uA..
  • Page 33 BASE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-107-826-11 CERAMIC CHIP 0.1uF 8-719-909-90 DIODE BAV99 1-126-965-11 ELECT 22uF 1-801-730-11 VARISTOR 1-115-156-11 CERAMIC CHIP 1-126-964-11 ELECT 10uF 8-719-911-55 DIODE U05G 1-136-193-11 MYLAR 0.47uF 250V 8-719-911-55 DIODE U05G 8-719-911-55 DIODE U05G 1-126-601-11 ELECT 2.2uF...
  • Page 34 BASE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-819-11 METAL CHIP 1/16W 1-216-841-11 METAL CHIP 1/16W 1-216-845-11 METAL CHIP 100K 1/16W 1-216-847-11 METAL CHIP 150K 1/16W 1-216-857-11 METAL CHIP 1/16W 1-216-847-11 METAL CHIP 150K 1/16W 1-216-857-11 METAL CHIP 1/16W...
  • Page 35 BASE MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R120 1-216-839-11 METAL CHIP 1/16W R221 1-219-570-11 METAL CHIP 1/16W R121 1-216-841-11 METAL CHIP 1/16W R222 1-216-859-11 RES-CHIP 1.5M 1/16W R122 1-216-829-11 METAL CHIP 4.7K 1/16W R123 1-219-570-11 METAL CHIP 1/16W...
  • Page 36 BASE MAIN BASE RF HAND MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3379-672-1 EEPROM ASSY 1-164-156-11 CERAMIC CHIP 0.1uF Including Base main board U4(IC CAT93C56S-M937) 1-115-156-11 CERAMIC CHIP and Hand main board U3(IC CAT93C46S-M937) 8-759-502-82 IC LM324M 1-162-919-11 CERAMIC CHIP 22PF...
  • Page 37 HAND MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 8-719-062-55 LED MS31D (LINE 1) 1-216-809-11 METAL CHIP 1/16W 8-719-047-37 DIODE BAS16 1-216-831-11 METAL CHIP 6.8K 1/16W 8-719-047-37 DIODE BAS16 1-216-849-11 METAL CHIP 220K 1/16W 8-719-909-90 DIODE BAV99 1-216-853-11 METAL CHIP 470K 1/16W...
  • Page 38 HAND MAIN HAND RF Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R161 1-218-915-11 RES-CHIP 620K 1/16W ACCESSORIES & PACKING MATERIALS R165 1-208-848-11 METAL CHIP 560K 0.5% 1/10W ******************************** < VARIABLE RESISTOR > 1-475-852-11 ADAPTOR, AC (AC-T122) 1-528-769-11 BATTERY, NICKEL CADMIUM STOREGE RV113 1-238-664-11 RES, ADJ, CERMET 10K(RECEIVER VOLUME)
  • Page 39 SPP-M937 Sony Corporation 2000H02087-1 Audio Entertainment Group 9-927-947-11 Printed in Japan © 2000.8 – 50 – Published by PE General Engineering Dept.

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