Sony TC-204SD Service Manual

Power requirements:
Power consumption:
Recording system:
Tape speed:
Fast forward and
rewind time:
Record Bias
frequency:
Signal to noise
ratio:
Total harmonic
distortion:
Frequency response:
SPECIFICATIONS
100, 110, 120, 127, 220 or 240V ac,
50/60 Hz (E and AEP Model)
240V ac, 50Hz (UK Model) Inputs:
8W
4-track 2-channel stereo
4.8cm/s (1-7 ips)
Approx. 90 seconds (by C-60)
Outputs:
105 kHz
DOLBY NR OFF
With Ferri-Chrome Cassette
59 dB at peak level (NAB)
50 dB (DIN)
With chromium dioxide cassette
55 dB at peak level (NAB)
With regular cassette
53 dB at peak level (NAB)
DOLBY NR ON
Improved 5dB at 1 kHz, 10 dB above 5kHz
1.7%
DOLBY NR OFF
With Ferri-Chrome Cassette and chromium
dioxide cassette
20-16,000 Hz (NAB)
40-15,000 Hz +3 dB (NAB)
40-15,000 Hz (DIN)
With regular cassette
20-14,000 Hz (NAB)
40-12,000 Hz (DIN)
‘Dolby’ and the double-D symbol are the trade marks
of Dolby Laboratory Inc.
Noise reduction system
Manufactured under license from Dolby Laboratory Inc.
Wow and flutter:
Record/playback connector:
Dimensions:
Weight:
0.09 % (RMS. weighted NAB)
+0.2 % (DIN)
MIC (phone jacks) .......cccceeesesseereeree ee 2
sensitivity -72dB (0.2 mV)
for low-impedance microphone
LINE
IN
(stereo
binaural
jack)
..........
1
(PhONO jacks) ........eceeeeee eee 2
sensitivity -22dB (0.06 V)
input impedance 100 k2
LINE
OUT
(phono
jacks)
.......ceeeeee
2
output
level
OdB
(0.775
V)
at
load
impedance
100
k2
with
LINE
OUT
level
control
at
“10”
suitable
load
impedance
more
than
10
k2
HEADPHONES.
........c:seeeeeeeereeeeerentnee
ott
1
suitable
load
impedance
8
22
Input impedance fess than 10 kQ
Output impedance less than 10 kQ
Approx. 430(w) x 160(h) x 325(d) mm
16 7h(w) x 6 14(h) x 12 34(d) inches
Approx. 8kg (17 tb 10 0z)
SERVICE MANIIAL

Sony TC-204SD Specifications

General

Brand	Sony
Model	TC-204SD
Category	Cassette Player
Language	English

Summary

Specifications

Power and Performance Specs

Covers power requirements, consumption, S/N, THD, frequency response, wow/flutter.

Connectivity and Physical Specs

Lists inputs, outputs, connectors, dimensions, and weight.

Section 1: Outline

Block Diagram

Illustrates the functional blocks and signal flow of the cassette deck.

Molded Chassis Notes

Provides important servicing notes regarding the molded chassis construction.

Section 2: Adjustments

Mechanical Adjustments

Details procedures for head height and torque adjustments.

Electrical Adjustments and Measurements

Tape Speed Adjustment

Procedure for adjusting and verifying tape speed accuracy.

Standard Record Procedure

Details the standard procedure for recording and setting input levels.

Timing and Switch Adjustments

Further Electrical Adjustments

Head Azimuth Adjustment

Procedure for aligning the record/playback head azimuth for optimal playback.

Playback Level Adjustment

Method for setting the correct playback output level.

Playback Equalizer Adjustment

Procedure for adjusting the playback equalizer settings.

Record Level Adjustment

Method for setting the correct recording input level.

VU Meter Calibration

Procedure for calibrating the VU meter indication.

Record Bias Adjustment

Procedure for adjusting the bias level for optimal recording.

19 kHz Filter Adjustment

Procedure for adjusting the 19 kHz filter for optimal performance.

Section 3: Diagrams

Mounting Diagram - Conductor Side

Shows the component layout on the conductor side of the mounting board.

Servo Amp Board Diagram

Illustrates the circuit board layout for the servo amplifier.

Switch Board Diagram

Depicts the circuit board layout for the switch functions.

Component Diagrams

Shows diagrams and pinouts for various semiconductor components.

Section 4: Exploded Views

Chassis and Panel Assemblies

Shows exploded views of chassis, panels, and related hardware.

Circuit Board and Jack Assemblies

Illustrates exploded views of circuit boards, jacks, and switches.

Knob and Meter Assemblies

Depicts exploded views of knobs, VU meter, and related components.

Mechanism Assembly Details

Provides exploded views of mechanism sub-assemblies like flywheel, idler, and levers.

Brake and Lever Assemblies

Shows exploded views of brake mechanisms, levers, and rollers.

Cassette Holder and Lid Assemblies

Details exploded views of the cassette holder, lid, and related components.

Cassette Mechanism Components

Shows exploded views of cassette mechanism parts like levers, springs, and guides.

Section 5: Electrical Parts List

Complete Circuit Boards

Lists part numbers for complete circuit boards.

Semiconductors

Lists part numbers for transistors, ICs, and diodes.

Transformers and Coils

Lists part numbers for transformers and coils.

Capacitors

Lists part numbers and values for various capacitors.

Resistors

Lists part numbers and values for resistors.

Switches, Jacks, Fuses, and Miscellaneous

Lists part numbers for switches, jacks, fuses, and miscellaneous components.

Section 6: Hardware

Screws

Lists types and sizes of screws used in the unit.

Washers

Lists types and sizes of washers used in the unit.

Retaining Rings

Lists types and sizes of retaining rings used in the unit.

Miscellaneous Hardware

Lists miscellaneous hardware items like lugs and nuts.

Hardware Nomenclature