Onkyo TARW 88 Service Manual

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SERIAL NO. 3121

ONKYO@ SERVICE MANUAL
STEREO CASSEITE

TAPE DECK
Model TA-W88

TABLE OF CONTENTS

Item Page

Specifications

Cautions

Block diagram
Component location
Parts list

Disassembling procedures
Exploded View
Mechanism operation

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Adjustment procedures 8
Tape l-Exploded View ll
Tape Z-Exploded view 13
Primed circuit board view from component side 15
Schematic diagram (120V model) 17
Printed circuit board-parts list 19
Schematic diagram (G/W models) 2|
Block diagram of IC 22
Packing view 23

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TA-WBB

SPECIFICATIONS

Track System : 4-track, 2-channel stereo

Recording System : AC bias

Erasing System : AC erase

Tape Speed : 4.8 cm/sec. High Speed 9.5 cm/sec,
Wow and Flutter : 0.06% (WRMS)

Frequency Response : 20- 15,000 Hz (30- 14,000Hza-J dB)

(normal position tape)

20716300 HZ (30-l5,000 H213 (18)
(high position tape)

20-17000 Hz (30*16,000 Hut-3 dB)
(metal position tape)

Signal-Io-Noise Ratio : Dolby NR out, 58 dB

(metal position tape)

A noise reduction of 10 dB above 5 kHz
and 5 dB at 1 kHz is possible with the
Dolby NR in

lnput Jacks : Microphone Jacks : 2

Minimum input level : 03 mV/GOOQ
lnput impedance : 5 kn
Optimum mic impedance :
2009 - 50kt}

Line In : 2
Minimum input level : 50 mV
Input impedance : 50 kfl

DIN Jack : I (Only G/W Models)
Minimum input level :01 mV/lkfl
lnput impedance : 2.7 kl)

CAUTIONS

l.

The continuous tape playback function is used to play back the
cassette tape in TAPE-l holder and then the cassette tape in
TAPE-2 immediately afterward lf TAPE-2 does not operate. con-
firm that the tape playback switch is in the SEP. position.

The TA-W88 has two cassette holders so that dubbing (copying)
operations can he performed without using another cassette deck.
To save time, the TA-WSS also has a high-speed dubbing capabili-
ty that records tapes in about half the time required by normal
speed recording. Tape dubbing can only be performed from the
TAPE-l cassette holder to the TAPE»2 cassette holder. Dubbing
the opposite direction is not possible.

Outputs : Line Out : 2
Output level : 350 mV (at 0 VU)
Optimum load impedance : over 50 Ml
DlN Jack (Only G/W models)
Standard output level : 500 mV (at 0
dB)
Optimum load impedance : over 50 kt?
Headphone Jack : l

89 -200fl
Motor : DC Servo motor : 2
Heads : Hard permalloy heads : 2
Ferrite head : l
Semiconductors : TR252 Diodes: 17 [CS LEDs:7 (G/W
models)
TR:50 Diodes:l7 [C15 LEDs:7 (D/Q
models)
Power Supply : AC 120V, 60Hz (D model)

AC 220V, SOHZ (Ct model)
AC 120/220V, 50/60Hz (W model)
AC 240V, 50Hz (Q model)

Power Consumption : 18W

Dimensions : 418(W) x 122(H) x 270(D)mm
16-1/2" x 4.7/8" x 105/8

Weight : 55 kg (12ll lbs.)

Accessories : Pin-type connecting cords

' Specifications and external appearance are subject to change
without notice because of product improvements

3. Voltage Selector (on back Panel)
W model is equipped with a voltage selector. If the unit you own
has a voltage selector, be sure it is set to the proper voltage before
the power is turned on. To change the selector to conform to the
power supply in your area, insert the tip of a screwdriver in the
groove of the switch and slide it all the way to the left or right.

220 V 120 V 220 V 120 V
at AC 120 V at AC 220 V

Note :
Units not equipped with a voltage selector can only be used in areas
where the power supply agrees with the voltage specified on the back
panel.