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Technics RS-B965 Service Manual

Technics RS-B965
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ORDER
NO.
AD9002237C8
Service
Manual
Cassette
Deck
Dolby
NR-Equipped
Stereo
Cassette
Deck
DC
(Batey
5-c
wa
Hx
PRO]
*
HX
Pro
headroom
extension
originated
by
Bang
Olufsen
and
manufactured
under
license
from
Dolby
Laboratories
Licensing
Corporation.
“DOLBY”,
the
double-D
symbol,
and
‘HX
PRO”
are
trademarks
of
Dolby
Laboratories
Licensing
Corporation.
RS-B755
MECHANISM
SERIES
(AR350)
Mi
SPECIFICATIONS
m
CASSETTE
DECK
SECTION
Deck
system
Stereo
cassette
deck
Track
system
4-track,
2-channel
Heads
Record
Permalloy
(Combination)
Playback
Permalloy
(Combination)
Erasure
Double-gap
ferrite
Motors
Capstan
drive
Quartz
DD
motor
Reel
table
drive
DC
motor
Cassette
hoider
open/close
DC
motor
Recording
system
AC
bias
Bias
frequency
80
kHz
Erasing
system
AC
erase
Tape
speed
Frequency
response
4.8cm/sec.
NORMAL
20
Hz~19
kHz
20
Hz~18
kHz
(DIN)
Cro:
20
Hz~20
kHz
20
Hz~19
kHz
(DIN)
METAL
20
Hz~21
kHz
20
Hz~20
kHz
(DIN)
S/N
(signal
level=max
recording
level,
CrOz
type
tape)
Dolby
C
NR
on
74
dB
(CCIR)
Dolby
B
NR
on
66
dB
(CCIR)
Dolby
NR
oft
57
dB
(A
weighted)
Technics
RS-B965
Color
(K)...
Black
Type
Area
Continental
Europe.
(EG)
F.
|
F.R.
Germany
and
Italy.
|
|
F.R.
Germany
and
Italy.
|
and
Italy.
Asia,
Latin
America,
(GC)
Near
East,
and
Africa.
(K)
Wow
and
flutter
0.05%
(WRMS)
+0.14%
(DIN)
Fast
forward
and
rewind
times
Approx.
90
seconds
with
C-60
cassette
tape
input
sensitivity
and
impedance
LINE
“60
mV/47
kQ
Output
voltage
and
impedance
LINE
400
mV/800Q
HEADPHONES
125
mV/8Q
(8Q~6000)
@
GENERAL
Power
consumption
21W
Power
supply
For
Continentai
Europe,
F.R.
Germany
and
Italy
AC
50
Hz/60
Hz,
220
V
For
Great
Britain
and
Oceania
AC
50
Hz/60
Hz,
240
V
For
others
AC
50
Hz/60
Hz,
110
V/127-V/220
V/240
V
Dimensions
(W
x
H
x
D)
430
x
135
x
290
mm
Weight
6.4
kg
Note:
Specifications
are
subject
to
change
without
notice.
Weight
and
dimensions
are
approximate.
Matsushita
Electric
Industrial
Co.,
Ltd.
Central
P.O.
Box
288,
Osaka
530-91,
Japan

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Technics RS-B965 Specifications

General IconGeneral
Track System4-track, 2-channel stereo
Heads3 (Playback, Record, Erase)
MotorDC Servo Motor
Tape TypeNormal, Chrome, Metal
Frequency Response20 Hz - 20 kHz
Signal to Noise Ratio72dB (Dolby C, Metal Tape)
Wow and Flutter0.05% WRMS
InputLine In
OutputLine Out, Headphones
Dimensions430 x 135 x 300 mm
FeaturesDolby B/C
Motor TypeDC Motor
InputsLine In
OutputsLine Out, Headphones

Summary

SPECIFICATIONS

CASSETTE DECK SECTION

Specs for deck system, heads, motors, tape speed, frequency response, S/N.

MAINTENANCE

Head Care and Demagnetization

Procedures for cleaning and demagnetizing tape heads.

CONNECTIONS

Regular Connections

Standard setup for connecting amplifier and CD player.

FRONT PANEL CONTROLS AND FUNCTIONS

Control Section I - Power, Display, and Basic Operation

Describes power, display, cassette holder, and core function buttons.

Recording and Calibration Controls

Controls for setting recording levels, balance, and calibration.

RECORDING WITH HIGH TONE QUALITY

APRS Function for Peak Level Control

Utilizes APRS to automatically set optimal recording levels.

High Tone Quality Recording Steps

Step-by-step guide for achieving optimal recording.

RECORDING CALIBRATION

Calibration Preparation and Procedure

Initial setup, checks, and detailed steps for level/bias calibration.

RECORDING CALIBRATION

DISASSEMBLY INSTRUCTIONS

Cabinet and Front Panel Removal

Steps to remove outer casing and front panel.

Internal PCB and Angle Removal

Procedures for removing internal circuit boards and chassis angles.

DISASSEMBLY INSTRUCTIONS

Main PCB and Mechanism Unit Removal

Steps for removing the main circuit board and mechanism assembly.

DISASSEMBLY INSTRUCTIONS

REPLACEMENT PARTS LIST

TERMINAL FUNCTION OF IC'S

IC901 Microcomputer Pinout

Details pin functions for the mechanical operation microcomputer.

REC CAL. ADJUSTMENT

Level Adjustment Procedure

Steps to set recording level balance between channels.

Bias Adjustment Procedure

Steps to adjust bias for optimal frequency response.

REC CAL. ADJUSTMENT

HEAD REPLACEMENT AND ADJUSTMENT

Head Installation and Alignment

Procedures for installing and aligning the playback/record head.

SCHEMATIC DIAGRAM

SCHEMATIC DIAGRAM

TROUBLESHOOTING OF DIRECT DRIVE MOTOR

Direct Drive Motor Troubleshooting Guide

Common problems, causes, and check points.

TERMINAL GUIDE OF IC'S, TRANSISTORS AND DIODES

INTERNAL CONNECTION OF FL

WIRING CONNECTION DIAGRAM

EXPLODED VIEWS

REPLACEMENT PARTS LIST

RESISTORS & CAPACITORS

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