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Sony NTM-30 Service Manual

Sound-sensor nursery monitor.
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NTM-30
SERVICE MANUAL
US Model
E Model
Ver 1.0 1999. 03
Receiver
Transmitter
SPECIFICATIONS
SOUND-SENSOR NURSERY MONITOR
MICROFILM

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   Summary of Contents for Sony NTM-30

  • Page 1 NTM-30 SERVICE MANUAL US Model E Model Ver 1.0 1999. 03 Receiver Transmitter SPECIFICATIONS SOUND-SENSOR NURSERY MONITOR MICROFILM...
  • Page 2: Table Of Contents

    LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY.
  • Page 3: General

    SECTION 1 This section is extracted from instruction manual. GENERAL – 3 –...
  • Page 4: Disassembly

    SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. • TRANSMITTER SECTION REAR CABINET 1 two screws (P2.6 × 12) 1 two screws (P2.6 × 12) 2 rear cabinet AC ADAPTER CORD SETTING Wind the AC adaptor cord to boss 2 time. AC adaptor cord boss –...
  • Page 5 • RECEIVER SECTION LOWER CABINET 1 two screws (P2.6 × 12) 1 two screws 3 lower cabinet (P2.6 × 12) 2 claw 2 claw – 5 –...
  • Page 6: Electrical Adjustments

    SECTION 3 ELECTRICAL ADJUSTMENTS Adjustment Location: TRANSMITTER SECTION Transmitter Output Adjustment Setting: CH switch (S101): B AF OSC – TX BOARD (Component Side) – TX board TX board frequency counter 50 Ω – (transmitter) – Signal level: RF-VTVM TX board –57 dB/1kHz TX board –...
  • Page 7 Receiver Loading Coil Adjustment RECEIVER SECTION Setting: Power switch (S202) : ON Receiver Sensitivity Adjustment CH switch (S201) Setting: VOLUME control (RV202): mechanical center Power switch (S202) : ON about 400 mm CH switch (S201) VOLUME control (RV202): mechanical center FM RF SSG RX board speaker out +...
  • Page 8: Diagrams

    NTM-30 SECTION 4 DIAGRAMS 4-1. BLOCK DIAGRAM • SIGNAL PATH TRANSMITTER SECTION L105 RV101 : RX X102 FREQUENCY MIC AMP, ALC ANT1 TRANSMITTER 16.620MHz X101 : TX IC101 (ANTENNA) OUTPUT 16.610MHz L105 (FREQUENCY) S101-1 MIC101 MIC AMP BUFFER OSCILLATOR BUFFER...
  • Page 9: Schematic Diagram - Tx/mic Boards

    NTM-30 4-2. SCHEMATIC DIAGRAM – TX/MIC Boards – (FREQUENCY) FREQUENCY DEVITATION Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 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 12: Schematic Diagram - Rx Board

    NTM-30 4-5. SCHEMATIC DIAGRAM – RX Board – • IC Block Diagrams IC201 TA31136FN MIXER L.P.F RSSI NOISE QUADRATURE COMPARATOR DETECTION DETECTOR NOISE BUFFER IF AMP LOCAL FILTER OSCILLATION IC202 CXA1522M VOLUME PRE/POWER 1 REGULATOR PRE/POWER 2 Note on Schematic Diagram: •...
  • Page 13: Exploded Views

    SECTION 5 EXPLODED VIEWS NOTE: (2) RECEIVER SECTION • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark ! or dotted line with mark may have some difference from the original are seldom required for routine service.
  • Page 14: Electrical Parts List

    SECTION 6 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark ! or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service.
  • Page 15 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark IC202 8-752-064-80 IC CXA1522M R221 1-216-107-00 METAL CHIP 270K 1/10W IC203 8-759-909-71 IC BA4558F IC204 8-759-510-73 IC BA10393F-E2 R222 1-216-097-00 RES, CHIP 100K 1/10W R223 1-216-097-00 RES, CHIP 100K 1/10W <...
  • Page 16 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < CAPACITOR > L106 1-419-113-11 COIL, CHOKE C101 1-163-229-11 CERAMIC CHIP 12PF < TRANSISTOR > C102 1-163-113-00 CERAMIC CHIP 68PF C103 1-163-229-11 CERAMIC CHIP 12PF Q101 8-729-800-15 TRANSISTOR 2SC2839TP-D C104 1-163-021-11 CERAMIC CHIP 0.01uF...
  • Page 17 NTM-30 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X103 1-767-046-11 VIBRATOR, CRYSTAL (16.630MHz) ************************************************************ MISCELLANEOUS ************** ! 10 1-473-646-31 ADAPTOR, AC D102 8-719-074-45 LED SLR-56MG3F (POWER) D204 8-719-055-63 LED SLR-56VR3F (RED) (MONITOR) D205 8-719-062-00 LED SLR-56DU3F (ORG) (RANGE ALM.)

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