Technics RS-B105

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Cassette Deck
Dolby NR-Equipped
Stereo Cassette Deck
DC (ecavsveren]
RS-D550W MECHANISM SERIES
SPECIFICATIONS
Deck system
Track system
Heads
REC/PLAY
Erasing
Motor
Recording system
Bias frequency
Erasing system
Tape speed
Frequency response
Metal
Cro,
Normal
SIN (Signal level =
Dolby NR in
NR out
Stereo cassette deck
4-track, 2-channel
MX head
Double-gap ferrite head
1 motor system
AC bias
50kHz
AC bias
4.8cm/sec. (1-7/8ips.)
20Hz~ 16,000 Hz
30Hz~ 15,000 Hz (DIN)
40Hz~ 15,000 Hz+3dB
20 Hz~ 15,000 Hz
30Hz2~ 15,000 Hz (DIN)
40Hz~14,000Hz+3dB
20Hz~ 15,000 Hz
30Hz~ 15,000 Hz (DIN)
40Hz~14,000Hz+3dB
max. recording level, CrO, type tape)
66dB (CCIR)
56dB (A weighted)
Technics
Wow and flutter
RS-B105
Color
(K)...Black Type
(S)...Silver Type
Color Areas
(K) (S) | [M]......... U.S.A.
(K) (S) | [E].......... All European
areas except
United Kingdom.
{EK]....... United Kingdom.
{EGA]....F.R. Germany.
(K) (S)
(K) (S)
0.08% (WRMS) +0.2% (DIN)
Fast forward and rewind time
Approx. 105 seconds with C-60 cassette tape
Input sensitivity and impedance
MIC
LINE
DIN...[EGA] only
0.25mV/400Q~10kQ
60mV/47kO
0.25mV/3.3kQ
Output voltage and impedance
LINE 400 mV/3.2kQ
Power consumption SW
Power supply [M] sviteteosccncareccerteogecttvade crs AC 60Hz 120V
[E] [EGA} ... AC 50Hz/60Hz 220V
(EK), iii eects AC 50Hz/60Hz 240V
Dimensions (W x H x D) 430 x 115 x 220mm
(16-15/16” « 4-17/32” x 8-21/32”)
Weight 3.0kg (6.6 ibs.)
* Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
“Dolby” and the double-D symbol are trade marks of Dolby
Laboratories Licensing Corporation.
Matsushita Services Company
50 Meadowland Parkway.
Secaucus. New Jersey 07094
Panasonic Saies Company,
Division of Matsushita Electric
of Puerto Rico, Inc.
Ave. 65 De Infanterra. KM 9.7
Victoria Industria} Park
Carolina, Puerto Rico 00630
Panasonic Hawaii Inc.
91-238 Kauhi St. Ewa Beach
PO. Box 774
Honolulu, Hawat 96808-0774
Matsushita Electric Trading Co., Ltd.
PO. Box 288, Central Osaka Japan

Technics RS-B105 Specifications

General

Track System	4-track, 2-channel stereo
Tape Speed	4.76 cm/s
Motor	DC Servo Motor
Tape Type	Normal, CrO2, Metal
Output	0.5V (line)
Dimensions	430 x 125 x 290 mm

Summary

Location of Controls

Safety Precaution

Insulation Resistance Test

Test to prevent shock hazard by measuring resistance between AC plug and metal parts.

Operation

Dolby Noise-Reduction System

System designed to reduce "hiss" noise during playback.

Disassembly Instructions

Measurements and Adjustments

Playback Gain Adjustment

Adjusts playback output level for specified test tape signals.

Bias Current Adjustment

Adjusts bias current to minimize output between TP1/TP2 and ground.

Overall Frequency Response

Measures and adjusts frequency response using recorded signals.

Overall Gain Adjustment

Adjusts overall output level to a standard value.

Head Azimuth Adjustment

Adjusts azimuth screw for balanced L-CH and R-CH outputs.

Tape Speed Adjustment

Adjusts tape speed using test tape and VR.

Playback Frequency Response

Checks playback frequency response against specified ranges.

Resistors and Capacitors

Printed Circuit Boards Wiring Connection Diagram

Printed Circuit Boards

Block Diagram

Electrical Parts List

Schematic Diagram

Cabinet Parts Location