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Fostex A-8 Service Manual

Fostex A-8
100 pages
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ModelA"8A"8LR
8
TRACK
RECORDER/REPRODUCER
Service
Manual
NOTICE
This
Service
Manual
applies
to
the
A-8
Series
(not
the
A-8LR
Series)
with
serial
numbers
from
and
after
those
listed
below.
UK
and
AUS
versions
0700464
FCA
and
CND
versions
0201667
EUR
versions
0601195
DM
versions
1000632
*
The
content
is
slightly
different
for
those
with
serial
numbers
younger
than
the
above.
A
separate
document
(Order
No.
8288010101)
is
available
for
the
revised
section
of
the
manual.
*
The
Service
Manual
for
A-8LR
starts
from
page
71
.
Fostex
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Fostex A-8 Specifications

General IconGeneral
BrandFostex
ModelA-8
CategoryRecording Equipment
LanguageEnglish

Summary

1. Introduction

2. Specifications

3. Controls and Functions

Transport Control Buttons

Buttons for tape movement, recording, and zero return functions.

Selection, Monitoring, and Indicators

Group select, MONITOR, counter, EDIT, NR, PITCH, CUE, RECORD LEDs.

Connectivity and Power Interface

Reel clamper, remote jacks, I/O jacks, and power cord.

4. Control Circuit Functions

System and Peripheral LSI Circuits

Explains LSI processing and circuits for basic transport and reset.

Motor and Solenoid Drive Circuits

Details circuits for remote punch, capstan, solenoids, and reel motors.

Counter and Indicator Circuits

Explains tape counter, LED indicators, and record track selection circuits.

5. Routine Maintenance

Cleaning Procedures

Instructions for cleaning heads, guides, pinch roller, and capstan.

Demagnetization and Testing

Demagnetizing heads/guides and testing brakes, pinch roller, amplifier.

6. Special Maintenance

Test Equipment Required

Lists necessary test equipment for special maintenance.

Component Dismounting Procedures

Step-by-step instructions for removing major internal components.

Transport Adjustments

Procedures for adjusting pinch roller, brakes, tape tension, wow/flutter, and tape speed.

Amplifier Adjustments

Calibration of Dolby, frequency response, bias, recording level, S/N, THD, crosstalk.

7. Exploded View, PCB Assemblies and Parts List

Hardware Coding List

Defines codes for screws, nuts, bolts, and washers used in assembly.

Component Parts Lists

Detailed lists of components for various PCB assemblies and the overall unit.

1. Controls and Functions (A-8LR)

Transport Control Buttons

Buttons for tape movement, recording, and zero return functions.

Selection, Monitoring, and Indicators

Input monitor, track selection, counter, EDIT, NR, PITCH, CUE, RECORD LEDs.

Connectivity and Power Interface

Reel clamper, remote jacks, I/O jacks, and power cord.

2. Specification (A-8LR)

6. Special Maintenance (A-8LR)

Amplifier Calibration and Adjustments

Detailed procedures for Dolby, frequency response, bias, recording level, S/N, THD, and sync crosstalk.

7. PCB Assemblies and Parts Lists (A-8LR)

Connector Board PCB Assembly

Lists components for the Connector Board PCB, including ICs, resistors, capacitors.

R/P Amplifier PCB Assembly (19cm/s)

Lists components for the R/P Amplifier PCB (19cm/s version).

Miscellaneous Component Lists

Lists various resistors, capacitors, and trimmer pots.

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