TV/Weather/FM/AM Walkman SRF-M37V US Model

Sony Corporation; Tokyo

  • Year
  • 2003 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • ID
  • 329885

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Main principle
  • PLL, Phase-locked loop; ZF/IF 450/10700 kHz
  • Wave bands
  • Broadcast (BC) and FM or UHF.
  • Power type and voltage
  • Dry Batteries / AAA 1.5 Volt
  • Loudspeaker
  • - only for Earphone!
  • Power out
  • 0.0028 W (max.)
  • Material
  • Plastics (no bakelite or catalin)
  • from
  • Model: TV/Weather/FM/AM Walkman SRF-M37V [US Model] - Sony Corporation; Tokyo
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 83 x 63 x 32 mm / 3.3 x 2.5 x 1.3 inch
  • Notes
  • The SRF-M37V  TV/Weather/FM Stereo/AM PLL Synthesized Radio is the US model released at the same time with the SRF-M37 and SRF-M37L variants sold on other markets offering different RF wave bands. See details below. 

    Main features:

    • 25 memory presets
    • TV - 2-13 channels
    • Weather: 1-7 channels
    • FM: FM: 87.5-108MHz, 100KHz Channel steps
    • AM: 530-1710KHz, 9 or 10KHz selectable Channel steps 
    • Local/DX selectable Sensitivity for TV/WB/FM
    • Clock with 12 hour format (am/pm)

    The other two model variants released along with this SRF-M37V, are:

    • SRF-M37 - Canadian Model, E Model (North and South America)
      • FM: 87.5-108MHz, 100KHz Channel steps
      • AM: 530-1710KHz, 9 or 10KHz selectable Channel steps
    • SRF-M37L - AEP Model (Other countries)
      • FM: 87.5-108MHz, 50KHz Channel steps
      • MW: 530-1610KHz, 9 or 10KHz selectable Channel steps
      • LW: 153-279KHz, 9KHz Channel steps

    Please see also the similar SRF-M37W model, released several years later, despite sharing the same chassis.


    Technical details:

    These SRF-M37 model variants share a common circuit base. The receiver PCB uses a Toshiba TA2154AFN 1.5Volt Tuner IC and a Sanyo LA4535M 1.5Volt Stereo Power Amp for Headphones IC. The Control Unit uses a Toshiba TC9329FA Portable Audio DTS Controller IC with specific firmware for each model variant, and two XC61CN08802NR Low Voltage Detectors IC's.


  • Net weight (2.2 lb = 1 kg)
  • 0.094 kg / 0 lb 3.3 oz (0.207 lb)
  • Author
  • Model page created by Jose Mesquita. See "Data change" for further contributors.

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The model TV/Weather/FM/AM Walkman is part of the collections of the following members.


Forum contributions about this model: Sony Corporation;: TV/Weather/FM/AM Walkman SRF-M37V

Threads: 1 | Posts: 1

This unit developed high distortion and low volume on one of the audio channels.

Checking the audio signal at the stereo volume potentiometer revealed normal levels at the IC2 LA4535M  pins 2 and 4.

So, I have ordered a LA4535M IC and replaced the old one with a fresh component.

As I am not living at my usual place I do not have accesss to my workshop. Try to use a regular soldering iron to solder a mini SMD component legs over a fragile PCB that can not stand heat without destroying the ultra mini copper traces.After some effort I managed to get all the IC legs soldered to the PCB and without any shorts between them.

The offending component, semi destroyed during the removal procedure due to the use of improper tools:

The new IC2 installed and working on both audio channels:

Jose Mesquita, 02.Jun.21

Weitere Posts (1) zu diesem Thema.