Sanyo M-W2K - Service Manual

SERVICE
MANUAL
STEREO RADIO DOUBLE
CASSETTE
RECORDER
SPECIFICATIONS
Power
Source
Hum
&
NOIS@
ooo.
ceee
ee
eeeeeteeees
Less
than
50
dBs
AG
Sill
heaters
Mick
ott
his
120/2
10/240V
Crosstalk
ie...)
anand
toate
Better
than
45
dB
(50/60Hz)
Channel
Separation
..........
Better
than
45
dB
DG
oicovs
oth
essa
tteorteesie
ean
egsonsses
Stove
vehe
ze
QV
(D
Cell
x
6)
Terminal
Impedance
Output
POW
.....e
cee
cttet
cece
ere
eeeneeeees
2.0
W
x
2
(10%)
MiGaicentantinitaniaaderetace.
600
ohm
Power
Consumption
............cee
cece
15
W
SPCAaK
Cis
eises
cc
dorslee
ease
3
ohms
Recording
System
......cccccceeee
AC
Bias
Headphone...
8
ohms
Erasing
SyStem
......cccccceeeseeeeeeneteeeerees
AC
Erasing
Frequency
Range
Tape
Spee@ds..icischelssceeni
Gu
dbaton:
4.75
cm/sec.
+3%
MW
ricinus
akeaies:
520
—
1,620
kHz
Fast
Forward
Time@..........
cece
110
sec.
(C-60
cassette)
SWiliieen
el
ee
naar
aad
2.3
—
7.0
MHz
REWINd
Timm
.........
ses
eeesceesereceeseserseeeeseees
110
sec.
(C-60
cassette)
SW
2a
estate
ine
ene
edi
7.0
—
22.0
MHz
Wow
&
Flutter
occ
cece
reeeeeteeseees
0.3
%
WRMS
EMiste
ee
Sine
det
88
—
108
MHz
Frequency
ReSpONnSe.......
cece
100
—
8,000
Hz
Input
Sensitivity
Signal
to
Noise
Ratio...
ccc
Better
than
40
dB
WMG
tianie
Ccvatt
olan
0.3
mV
-
NOTE:
Specifications
are
subject
to
change
without
notice.
a
WM-10144

Sanyo M-W2K Specifications

General

Brand	Sanyo
Model	M-W2K
Power Source	Battery
Battery Type	AA
Number of Batteries	2
Headphones	3.5mm jack
Type	Cassette Player
Weight	200g

Summary

Specifications

Power Source

Details AC and DC power input requirements for the device.

Output Power

Specifies the audio output power of the stereo system.

Power Consumption

Indicates the device's operational power usage.

Recording System

Describes the technology used for audio recording.

Erasing System

Explains the mechanism for erasing audio from tape.

Tape Speed

Specifies the standard tape playback speed.

Fast Forward Time

Indicates the approximate time for fast-forwarding a cassette.

Rewind Time

Indicates the approximate time for rewinding a cassette.

Wow & Flutter

Measures tape speed variations affecting audio quality.

Frequency Response

Details the audio frequency range reproduction capabilities.

Signal to Noise Ratio

Measures the audio signal clarity relative to noise.

Hum & Noise

Specifies the levels of unwanted electrical hum and noise.

Crosstalk

Measures signal bleed between stereo channels.

Channel Separation

Indicates how well stereo channels are isolated from each other.

Terminal Impedance

Specifies the electrical impedance of various terminals.

MIC

Details microphone input sensitivity.

Speaker

Specifies speaker impedance.

Headphone

Specifies headphone impedance.

Frequency Range

Covers radio reception frequencies (MW, SW, FM).

Input Sensitivity

Details sensitivity of various input signals.

Alignment Procedures

FM Alignment

Step-by-step guide for aligning the FM tuning circuit.

MW Alignment

Step-by-step guide for aligning the MW tuning circuit.

FM MPX Alignment

Guide for aligning the FM multiplex stereo signal.

SW1 Alignment

Step-by-step guide for aligning the SW1 tuning circuit.

Alignment Procedures

SW2 Alignment

Step-by-step guide for aligning the SW2 tuning circuit.

Head Azimuth Adjustment

Procedure to align the cassette head's azimuth for optimal playback.

Tape Speed Adjustment

Procedure to calibrate the tape playback speed.

Mechanical Adjustment

Details on mechanical adjustments, noting limitations.

Exploded View - Cassette Mechanism A

Exploded View - Cassette Mechanism B

Schematic Diagram

Wiring Diagram

Exploded View - Cabinet & Chassis

Parts List

Capacitors

List of capacitors with part numbers and specifications.

Power P.C.B. Assembly

Components and parts for the power circuit board.

Semiconductors

List of semiconductor components with part numbers.

Cassette Mechanism

Parts list for cassette mechanism assemblies A and B.

Parts List (Continued)

Chassis Electrical Parts

List of electrical components mounted on the chassis.

Main P.C.B. Assembly

Components and parts for the main circuit board.

Semiconductors

List of semiconductor components used in the unit.

Capacitors

Detailed list of capacitors and their specifications.