Technics RSB 965 Service Manual

Page 1

OF. DER NO. ADQOOA337CB

Service Manual

Dolby NR-Equipped
Stereo Cassette Deck

Dil-

Cassette Deck

RS-BQG5

Color
(K)... Black Type
Area
Country
Code Area Color

(E) Continental Europe.
(EB) Great Britain.
(EG) FR. Germany and ltaly. (K)

Asia, Latin America,
(GO) Near East, and Africa.
(GN) Oceania.

a: HX Pro headroom extension originated by Bang
Olufsen and manulactured 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)

I SPECIFICATIONS
I CASSETTE DECK secnou

Deck system Stereo cassette deck
Track system rack. 2~channel
Heads
Record Permalloy (Combination)
Playback Pennalloy (Combination)
Erasure Doublegap ferrite
Motors
Cannon drive Quartz 00 motor
Reel table drive DC motor
Cassette holder open/close DC motor
Recording system AC bias
Bias frequency 80 kHz
Erasing system AC erase
Tape speed
Frequency response 48 cmlsec.
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~2o kHz (DIN)
SIN (signal level=max recording level. CrO: type tape)
Dolby O NH on 74 dB (CClR)
Dolby 3 NR on 66 d8 (CClR)
Dolby NH oft 57 dB (A weighted)

Technics

Wow and flutter 0.05% (WRMS)
10.14% (DIN)

Fast forward and rewind times
Approx. 90 seconds with 060 cassette tape

Input sensitlvtty and impedance

LINE ' 60 HIV/47 k0
Output voltage and impedance

LINE 400 mVIEOOQ

HEADPHONES 125 mV/SQ

(8Q~600(1)

I GENERAL
Power consumption 21 W
Power supply

For Continental Europe, F.R. Germany and italy
AC 50 Hzl60 Hz. 220 V
For Great Britain and Oceania AC 50 H2160 Hz. 240 V
For others
AC 50 HZIGO HZ. 110 VI127V/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 lndustrial Co., Ltd.
Central PO. Box 288, Osaka 530-91, Japan

Page 2

I CONTENTS

MAINTENANCE.

ACCESSORIES
CON NECTIONS . .
FRONT PANEL CONTROLS AND FUNCTIONS A, 5

RECORDING WITH HIGH TONE 0UALITY..
DISASSEMBLY |NSTRUCTIONS..................
MEASUREMENT AND ADJUSTMENT METHODES
TERMINAL FUNCTION OF ICS

TROUBLESHOOTING OF DIRECT DRIVE MOTOR.

I MAINTENANCE

Head care

To assure good sound quality for recording and playback. be sure
to clean the heads after approanately every 10 hours of use.
1) Press the open/close button.
2) Press the power standbydflon switch to turn the unit off.
:3) Clean the heads. pinch roller and the capstan shaft With a
cotton swab (or With a soft. lintlree cloth) slightly morstened
with alcohol.
Do not use any solution other than alcohol for head cleaning.

Capslan fl Cotton Swab
Pinch Roller fl
.\ 3 i //e l

W

I

Erase Head

l
¥ Pinch Roller
F Capstan

Record/Play Head

.ACCESSORIES

' Stereo connection cable ...............................
(SJP2249-3)

2

' AC plug adaptor ....................................... 1

(SJP9215) For (60) area only.

TERMINAL GUIDE OF IC'S.
TRANSISTORS AND DIODES..
INTERNAL CONNECTION OF FL

WIRING CONNECTION DIAGRAM . 41
PRINTED olncun BOARDS. 4245
REPLACEMENT PARTS LIST 47~50
EXPLODED VIEWS.... ........ .. 51~54
REPLACEMENT PARTS LIST . 55. 56
PACKING 53
RESISTORS & CAPACITORS ............................... . ........ 57~60

X TECHNICAL INFORMATION

XThis technical information Is located on pp 45.51 of the
PIS-3555 Service Manual (Order No. A0890723105).
Therefore, refer to that Service Manual.

Head demagnetization

In order to maintain good sound quality during recording and
playback. it is recommended that the heads should be demagne-
tlzed if distortion or poor sound quality persist after cleaning the
heads.

If the heads become magnetized. they could create noise in
recordings. loss of high-frequency response. or erasure of valuable
recordings. Several types of head demagnetizers are available and
may be purchased at local electronics supply stores. Follow the
instructions that are supplied with the device.

000 not bring any type of metal objects or tools such as magnetic

screwdrivers in contact with the head assembly.

Maintenance of external surfaces

To clean this unit. use a soft. dry cloth.

For very dirty surfaces. dip a soft cloth in a weak soap-and-water
solution and wring well. After cleaning. wipe With a soft. dry cloth. 4
Never use alcohol, paint thinner, benzine. or a chemically treated
cloth to clean this unit.

Such chemicals may damage the units finish.

- AC power supply cord ................................. 1
RJAooo4 (GC)
SFDACOSEOS (E. EG)
SJA173-1 (GN)
SJA193-1 (EB)