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Technics RS-M04

Technics RS-M04
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ORDER
NO.
ARD-8004037C
Service
Manual
Cassette
Deck
RS-M04
;
(Silver
Face)
Concise
Metal
Tape-Compatible
Cassette
Deck
with
2-Color
FL
Meters
and
Automatic
Tape
Select
[covey
system
This
is
the
Service
Manual
for
the
following
areas.
arepsdres
For
all
European
areas
except
United
Kingdom.
aeealeees
For
United
Kingdom.
RS-M24
MECHANISM
SERIES
Specifications
Track
system:
4-track
2-channel
stereo
recording
and
playback
Inputs:
MIC;
sensitivity
0.25
mV,
input
impedance
10kQ
Tape
speed:
48cm/s
applicable
microphone
impedance
4002—
10
kQ
Wow
and
flutter:
0.05%
(WRMS),
£0.14%
(DIN)
LINE;
sensitivity
60
mV,
input
impedance
70kQ
Frequency
response:
Metal
tape;
a=
tae
ie
(DIN)
Outputs:
LINE;
output
level
700
mV,
output
impedance
30—16000
Hy
£3qB
1.5kQ
or
less
load
impedance
22
kQ
over
CrO2/Fe-Cr
tape;
20—
18,000
Hz
HEADPHONE
;
output
level
125
mV,
load
30—
16,000
Hz
(DIN)
impedance
82
30—16,000Hz
+3dB
Bias
frequency:
75
kHz
Normal
tape;
20—
17,000
Hz
Motor:
Electrical
DC
governor
motor
30—
15,000
Hz
(DIN)
Heads:
2-head
system
30—
14,000Hz
+3dB
1-MX
head
for
record/playback
Signal-to-noise
ratio:
Dolby
NR
in;
67
dB
(above
5kHz)
Dolby
NR
out;
57
dB
(signal
level=max.
recording
level,
Fe-Cr/CrO2
1-sendust/ferrite
double-gap
head
for
erasure
Power
requirement:
AC
110/125/220/240V,
50-60
Hz
type
tape)
Power
consumption:
14W
Fast
forward
and
Dimensions:
29.7
cm(W)
X
12.2
cm(H)
X
23.2
cm(D)
rewind
time:
Approx.
95
seconds
with
C-60
cassette
tape
Weight:
4.1kg
Specifications
are
subject
to
change
without
notice.
*
‘Dolby’
and
the
double-D
symbol
are
trademarks
of
Dolby
Laboratories.
.
hita
Electri
ing
Co.,
Ltd.
Technics
ee
ee
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Technics RS-M04 Specifications

General IconGeneral
Track System4-track, 2-channel stereo
Wow and Flutter0.07% WRMS
InputsLine In
TypeCassette Deck
Heads1 x erase
MotorDC Motor
Tape TypeCrO2, Metal
OutputLine Out
Dimensions430 x 300 x 100 mm
OutputsLine Out, Headphone

Summary

Service Manual

Specifications

Detailed technical specifications for the cassette deck, including track system, speed, frequency response, and power.

Location of Controls and Components

Disassembly Instructions

Disassembly Procedures and Parts

Details on parts to remove and procedures for disassembly, referencing figures and screw types.

Disassembly Notes (Mechanism Unit)

Assembly Instructions

Component Installation Procedures

Flywheel Retainer Installation

Detailed steps for installing the flywheel retainer, including specific part engagement.

Operation Button Assembly Mounting

Procedure for mounting the operation button assembly, ensuring correct lever alignment.

Main Circuit Board Installation

Precautions and steps for installing the main circuit board, ensuring button alignment.

Circuit Boards and Adjustment Parts Location

Measurement and Adjustment Methods

Tape Speed and Selector Adjustment

Methods for adjusting tape speed and setting the tape selector based on tape type.

Performance Measurement Setup

Head Position and Azimuth Adjustment

Steps for adjusting head position and azimuth for optimal playback quality.

Tape Speed Accuracy and Fluctuation

Methods to measure and adjust tape speed accuracy and fluctuation with standard values.

Audio Performance Testing

Playback Frequency Response

Measuring the frequency response during playback using test tapes and equipment.

Playback Gain Measurement

Measuring the audio output gain during playback with standard values.

Advanced Performance Testing

Overall Frequency Response

Measuring the overall frequency response across different tape types (Normal, Fe-Cr, CrO2, Metal).

Bias and Erase Current Adjustment

Adjusting bias current and erase current for optimal recording performance.

System Calibration and Settings

Overall Gain Adjustment

Adjusting the overall audio gain of the unit to specified levels.

Fluorescent Meter Calibration

Calibrating the fluorescent level meters for accurate signal indication.

Dolby NR Circuit Operation

Checking and verifying the Dolby Noise Reduction circuit's performance.

Electrical Parts Location

Schematic Diagram

Circuit Boards

Wiring Connection Diagram

Exploded Views

Mechanical Parts Location

Cabinet Parts

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