Onkyo TARW 11 Service Manual

Page 1

TA~RW11

ONKYO SERVICE MANUAL

STEREO CASSEI'I'E
TAPE DECK
MODEL TA-RW1 1
Black and silver models
UDN, UDC, UD 120V AC, 60Hz
UG 220V AC, 50Hz
UW 120 or 220V AC, 50/60Hz
UQA, UQB 240V AC, SOHz

SAFETY-RELATED COMPONENT WARNINGII

COMPONENTS IDENTIFIED BY MARK 1. ON
THE SCHEMATIC DIAGRAM AND IN THE PARTS
LIST ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE THESE COM-
PONENTS WITH ONKYO PARTS WHOSE PARTS
NUMBERS APPEAR AS SHOWN IN THIS MANUAL:

MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT
EXPOSED PARTS ARE ACCEPTABLY IN-
SULATED FROM THE SUPPLY CIRCUIT BEFORE
RETURNING THE APPLIANCE TO THE
CUSTOMER.

i ONKYO:
l AIIIIIII IIIIMPIIIIIIIIS

SPECIFICATIONS

Track System: 4-track, 2-channe1 stereo
Recording System: AC bias

Erasing System: AC erase

Tape Speed: 4.8 cm/sec (1.7/8 i.p.s.)
Wow and Flutter: 0.05% (WRMS)

Frequency Response:

S/N Ratio:

Input Jacks:

Outputs:

Motors:

20 - 15,000Hz (normal)
(30 - 14,000l-Iz 1 3dB)
20 - 16,000Hz (High)
(30 A 15,000Hz t 3dB)
20 7 17,000Hz (Metal)
(30 - 16,000Hz 1 3dB)
Dolby NR out: 60dB (metal position tape)
A noise reduction of 10dB above
SkHz and SdB at IkHz is possible
with Dolby B. A noise reduction
of 20dB at Skl-Iz is possible with
Dolby C.
Line IN: 2
Minimum input level: 50mV
Input impedance: 50 kohms
Microphone Jack: 1
Minimum input level: 1.0mV/600 ohms
Input impedance: 5 kohms

Line OUT: 2
Std output level: SOOmV (OdB)
Opt load impedance: over 50 kohms
Headphone Jack:
Opt load impedance: 8 to 200 ohms
DC servo motor: 2
DC motor: 4

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TA-RWll

Heads: Hard Permalloy: 2 (tec/pb) Auto Music Control System (AMCS) and AMCS Standby

Ferrite erase head: 1 Tape compartment 1 is equipped with the AMCS functior
Semiconductors: 359:7 Diodes: 50 IC: 15 which automatically plays the first 10 seconds of every song on a
Power SUpply: AC 120V/60Hz cassette in either the forward or reverse direction depending on
POW Consumption: 35 watts the head directionr To stop AMCS and resume normal playback
Dimensions: 418(W)x 115(H)x336(D) mm from that pomt, JUSI press the play button. When the AMCS

(16-1/2 X 4-1/8 x 134/4) standby function is used instead, tape is wound to the beginning
Weight: 6.9 kg. (15.2 1135.) ofa song and stops. This is very useful when copying cassettes.
Specifications and external appearance are subject to change Many Other Useful Features

without notice because ofproduct improvements. In addition to the above-mentioned features. this deck also

FEATURES has a mic mixing capability. an auto space rec mute button,
fully automatic tape selection and easy-to-read peak level meters.

Two Auto-Reverse Tape Compartments

Both tape compartment 1 (playback only) and 2 (recording and

playback) use an auto-reverse mechanism. That means yor can

make recordings using both sides of a cassette with no worries, SERVICE PROCEDURES

even when dubbing cassettes from tape compartment 1 to com- 1. Instulation resistance meaurement
partment 2. With a C-60 cassette, for example, its. possible to Connect the insulating-resistance tester between the plug of
record programs up to one hour long With hands-off srmphcrty. power supply cord and chassis.
Specifications;D model 500 V 3.3+0.33 M
Computer-Controlled 6-Motor Configuration G/W models 500 V more than 10 M
Each tape compartment is equipped with 3 motors (including
motors to move each of the head assemblies). 2. Replacing the lamps
Computer control gives the deck full logic convenience so theres This unit used the lamps listed below,
no Steed to press the stop button when switching tape transport Circuti No. Parts No. Description
m° 53 Mechanism 24606173 SOmA, 14v. Lamp
Dolby B and C Noise Reduction 145a

Along with standard Dolby B NR, this deck also has the even
more effective Dolby C NR system. Dolby C NR reduces tape
background noise by 20dB at SkHz, about 3 times more than
Dolby B NRi In addition to its wide band noise reduction, Dolby
C NR uses a sliding band technique that varies the band width of
noise reduction according to the input level, thereby avoiding
noise pumping. Dolby C NR also has an anti-saturation effect
to reduce the chance of tape saturation in the high range. All
these features combine to eliminate the adverse effects on tape
sound that other noise reduction systems can cause.

CAUTION: Before replacing the lamps. be sure to unplug
the power supply cable.

12-Hour Auto-Reverse Relay Playback

In the auto-reverse relay mode, auto-reverse playback of the
cassette in tape compartment 2 begins immediately after both
sides of the cassette in tape compartment 1 have been played
back. This sequence can be repeated up to four times for ex-
tended uninterrupted playback. With a C-90 cassette, for exam-
ple, this mode can provide up to 12 hours of nonstop music (180
minutes x 4 times).

One-Touch Synchronized Dubbing Start-Up

Dubbing cassettes on this deck is easy Simply put tape com-
partment 2 in the dubbing/pause standby mode and press the
play button of tape compartment 2. Tape compartment 1 will
automatically switch to the playback mode the instant recording
of cassette 2 begins.