Sony TC-388-4 - User Manual

Power Requirements:
Power Consumption:
Tape Speed:
Recording Time:
Reels:
Recording System:
Frequency Response:
Distortion:
SPECIFICATIONS
120V AC, 60 Hz (USA Model)
120V AC, 60 Hz (100, 110, 127,
220, 240 V AC, 50 Hz adjustable
by the Sony personnel) (PX Model)
40 W (USA Model)
32 W (PX Model)
19 cm/s (7/2 ips), 9.5 cm/s (3% ips)
45 min. at 19 cm/s (7 ips)
quadraphonic recording with 1,800
ft tape
17.8 cm (7 inches) or smaller
4-track quadraphonic, stereo and
mono system
With Sony SLH tape
20 ~ 30,000 Hz at 19 cm/s (7/2 ips)
20 ~ 23,000 Hz (+3 dB) at 19 cm/s
(7/2 ips)
30 ~ 19,000 Hz at 9.5 cm/s (3% ips)
With standard tape
20 ~ 25,000 Hz at 19 cm/s (7'/2 ips}
30 ~ 17,000 Hz at 9.5 cm/s (3% ips)
1.2%
Wow and Flutter:
S/N Ratio:
Inputs:
Outputs:
Dimentions:
Weight:
0.09 % at 19 cm/s (7 ips)
0.12% at 9.5 cm/s (35/4 ips)
55 dB with Sony SLH tape
Microphone inputs ...........: 4
Sensitivity 0.2 mV (—72 dB)
Accept low impedance microphones
Line inputs 2.0... eee 40
Sensitivity 0.06 V (—22 dB)
Impedance 100 kQ
Line OUTPUTS .......... eee 4
Output level 0.775 V (0 dB) at load
impedance 100 KQ with line output
volume control set to MAX
Suitable load impedance higher than
10kQ2
Headphone outputs........... 2
Accept an 822 stereo headphones
422 (w) x 505 (h) x 220 (d) mm
16°78 (w) x 197 (h) x 87/4 (d) inches
14.5 kg (31 Ib 14 oz)
SERVICE MANUAL

Summary

OUTLINE

PAN POT Operation

Explanation of the Panoramic Potentiometer's function.

MUTING;PAUSE Lever Function

How to operate the MUTING/PAUSE lever for tape control.

Block Diagram Overview

Visual representation of the unit's signal flow and architecture.

External View and Controls

Identification of external controls and physical features.

Internal Component Layout

Identification of internal components and circuit boards.

DISASSEMBLY

Amplifier Panel Removal

Procedure for removing the amplifier panel.

Reel Panel and Head Cover Removal

Steps for detaching the reel panel and head cover.

Cabinet Disassembly

Procedure for removing the main external cabinet.

ADJUSTMENTS

Mechanical Adjustments

Procedures for mechanical tuning and calibration of the tape deck.

Electrical Adjustments

Procedures for electrical tuning and calibration of audio circuits.

DIAGRAMS

Schematic Diagram

Detailed electrical circuit diagrams for all unit sections.

Mounting Diagrams

Diagrams showing component placement on circuit boards.

Level Diagrams

Diagrams illustrating signal levels at various points in the circuit.

EXPLODED VIEWS

Exploded View 1

Diagram showing external and front panel component layout.

Exploded View 2

Diagram showing reel table and mechanical part layout.

Exploded View 3

Diagram showing pause and idler mechanism component layout.

Exploded View 4

Diagram showing head assembly and pinch roller layout.

Exploded View 5

Diagram showing circuit boards, switches, and jacks layout.

PARTS LIST

Complete Circuit Boards

List of part numbers for complete circuit boards.

Semiconductors (Transistors, Diodes, ICs)

List of transistors, diodes, and ICs with their part numbers.

Capacitors

List of capacitors with part numbers, values, and types.

Coils

List of coils with part numbers and types.

Transformers

List of transformers with part numbers and specifications.

Resistors

List of resistors with part numbers and values.

Switches

List of switches with part numbers and types.

Jacks

List of input/output jacks with part numbers.

Miscellaneous Parts

List of miscellaneous parts like connectors and fuses.

Included Accessories

List of included accessories like reels, manuals, and cleaning kits.

HARDWARE

Screws

List of screws with part numbers and types.

Washers

List of washers with part numbers and sizes.

Retaining Rings

List of retaining rings (E-washers) with part numbers.

Hardware Nomenclature

Explanation of screw types and hardware identification.

Sony TC-388-4 Specifications

General

Signal-to-Noise Ratio	55dB
Reel Size	7-inch
Tape Speed	3.75 / 7.5 ips
Heads	3
Frequency Response	30Hz to 22kHz at 7½ ips
Inputs	Line, Microphone
Outputs	Line output, headphone output
Semiconductors	Transistors, Diodes
Output	0.775V
Type	4-track reel-to-reel tape deck