Sony TC-640 Service Manual

Power Requirements:
Track System:
Reel Size:
Tape Speed:
Recording Time:
(with 1,800 ft. tape)
Frequency Response:
we
Signal-to-Noise Ratio:
SPECIFICATIONS
AC 100 V,110V,117V,
120 V, 125 V, 220 V, 240 V
50/60 Hz, 80 W (for General Export)
AC 117 V, 60 Hz, 80 W (for USA)
Four-track stereo and mono
7” (18 cm) maximum Inputs:
7% ips and 3% ips
(19 cm/s and 9.5 cm/s)
4-track 4-track
Tape speed stereo. mono
7% ips 1.5hrs 3hrs
(19 cm/s)
3%
ips
3hrs
6
hrs
Outputs:
(9.5
cm/s)
5
30 ~ 20,000 Hz at 7% ips
(19 cm/s)
30 ~ 15,000 Hz at 3% ips
(9.5 cm/s}
{with standard tape)
20 ~ 25,000 Hz at 7% ips
(19 cm/s)
30 ~ 18,000 Hz at 3% ips
(9.5 ¢m/s)
(with SONY SLH tape)
Weight:
52 dB (with standard tape)
55 dB (with SONY SLH tape)
Flutter and Wow:
Recording Bias Frequency:
Semiconductors:
Dimensions:
8 [ISO)
Set using 1SO screws
0.07 % (WRMS) at 7% ips
(19 cm/s)
0.11 % (WRMS) at 3% ips
(9.5 cm/s)
120 kHz
Two MICROPHONE inputs
Impedance; 600
Maximum sensitivity: 0.19 mV
(—72 dB)
Two LINE INPUTs
Impedance; 100 k{2
Maximum sensitivity; 60 mV
(—22 dB)
Two LINE OUTPUTs
Impedance; 100kQ2 ,
Output level; 0.775 V (0 dB)
HEADPHONE output
Impedance; 8
Output level; 38 mV (—26 dB)
with 8 92 load
22-transistors and 8-diodes
1417/32(w)
x
159/16(H)
x
919/32"
(D)
(369
x
395
x
243.5
mm)
33 Ib 2 0z (15 kg)
SON
Ye
SERVICE
MANUAL

Sony TC-640 Specifications

General

Brand	Sony
Model	TC-640
Category	Tape Deck
Language	English

Summary

SECTION 1 GENERAL DESCRIPTION

1-1. BLOCK DIAGRAM

Illustrates the signal path and main functional blocks of the tape recorder.

SECTION 5 ADJUSTMENT PROCEDURES

5-1. MECHANICAL ADJUSTMENTS

Covers adjustments for automatic shut-off, pinch roller pressure, and reel torque.

5-2. ELECTRICAL ADJUSTMENTS

Procedures for electrical adjustments and calibration of various functions.

SECTION 6 DIAGRAMS

6-1. SCHEMATIC DIAGRAM

Detailed schematic diagrams for the tape recorder's circuitry.

6-2. MOUNTING DIAGRAM

Diagrams showing the placement of components on circuit boards.

6-3. LEVEL DIAGRAM

Illustrates signal levels at various points in playback and record modes.

SECTION 7 SEMICONDUCTOR ELECTRODES

Semiconductor Electrodes

SECTION 8 ELECTRICAL PARTS LIST

SECTION 9 EXPLODED VIEWS

9-1. CABINET - Top View

Exploded view of the cabinet assembly, showing top view components.

9-2. AMP CHASSIS - Top View

Exploded view of the amplifier chassis, showing top view components.

9-3. HEAD DECK - Top View (1)

9-4. HEAD DECK - Top View (2)

9-5. PRINTED CIRCUIT BOARD - Top View

9-6. CHASSIS - Top View

9-7. CHASSIS - Bottom View