TV/Weather/FM/AM Walkman SRF-M37V US Model
Sony Corporation; Tokyo
- Pays
- Japon
- Fabricant / Marque
- Sony Corporation; Tokyo
- Année
- 2003 ?
- Catégorie
- Radio - ou tuner d'après la guerre 1939-45
- Radiomuseum.org ID
- 329885
Cliquez sur la vignette du schéma pour le demander en tant que document gratuit.
- Principe général
- PLL (Phase-locked Loop, boucle à phase asservie); FI/IF 450/10700 kHz
- Gammes d'ondes
- PO et FM
- Tension / type courant
- Piles sèches / AAA 1.5 Volt
- Haut-parleur
- - Seulement pour écouteur
- Puissance de sortie
- 0.0028 W (max.)
- Matière
- Plastique moderne (pas de bakélite, ni de catalin)
- De Radiomuseum.org
- Modèle: TV/Weather/FM/AM Walkman SRF-M37V [US Model] - Sony Corporation; Tokyo
- Forme
- Portable, appareil de poche. Taille < 20cm
- Dimensions (LHP)
- 83 x 63 x 32 mm / 3.3 x 2.5 x 1.3 inch
- Remarques
-
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.
- Poids net
- 0.094 kg / 0 lb 3.3 oz (0.207 lb)
- Auteur
- Modèle crée par Jose Mesquita. Voir les propositions de modification pour les contributeurs supplémentaires.
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Collections
Le modèle TV/Weather/FM/AM Walkman fait partie des collections des membres suivants.
Contributions du forum pour ce modèle: Sony Corporation;: TV/Weather/FM/AM Walkman SRF-M37V
Discussions: 1 | Publications: 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