Sony WM-FX50 User Manual

Test equipment,Jigs and Material
Test equipment
Digital multimeter
FM RFF signal generator
AM RF signal generator
Stabilized power supply
Speed checker
Wow and Flutter
Frequency counter
VTVM
Spectrum analyzer
SONY Digital tuning radio ICF-2001 or equivalents
Feature
¢ Double Super heterodyne FM receiver for
WM-F X50
The FM receiver is used the double super hetero-
dyne system which is superior in FM sensitivity and
image sprious rejection.
System comparison chart
| WM-FX50 WM-F702
Doubl Sing]
a3 ouble super ingle super
BC Systm heterodyne (FM) | heterodyne
Detector Double pulse count | Quadrature
AM IF 55kHz 450kHz
28.6MHz (1st IF) 10.7MHz
EMR 150kHz (2nd IF)
Filter element __| Monolisic Ceramic
Method of calculation
NOTE: fs = Tuned frequency
* FM local oscillator frequency
1st stage local oscillator frequency (fo)
(cad (284 = OSC )
[For Example]
Tuned at 100MHz
— 150kHz
57.5
fo = 100 + a) — 150kHz = 128.6MHz
2nd stage local oscillator frequency
57.5MHz (fixed)
Jigs
Test tape Part Number
- WS-48A (3kHz, 0dB) 7-819-032-11
Cassette type torque meter
- CQ-102C (normal direction) 8-909-708-22
- CQ-102RC (reverse direction) 8-909-708-26
- CQ-201B (FF and REW) 8-909-708-41
Cassette type Tension meter
- CQ-403A (normal direction) 8-909-708-92
- CQ-403R (reverse direction) 8-909-708-95
Screw locking compound
Neji lock G (1401B) 7-432-114-11
Greases and Oil
Machine oil Hydro Fruid NT-68 7-661-018-18
Sankol FG-84M 7-662-001-36
* FM image frequency
foil = fs +( S13MHa = 150kH2) x 2
pi oro
[For Example]
Tuned at 100OMHz
foil = 100MHz + ( SEM = 150k) x2
+ 150kHz = 28.9MHz
= 157.2MHz
foi2 = 28.9MHz (Fixed)
* AM local oscillator frequency (fo)
fo = (fs + 55kHz) X 2
[For Example]
Tuned at 1000kHz
fo = (1000kHz + 55kHz) X 2 = 2110kHz
* AM image frequency (foi)
fol = fs + 55kHzX 2
[For Example]
Tuned at 1000kHz
foi = 1000kHz + 55kHzX 2 = 1110kHz

Sony WM-FX50 Specifications

General

Brand	Sony
Model	WM-FX50
Category	Cassette Player
Language	English