Onkyo TA 630 D Service Manual

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SERIAL NO. 3055

ONKYO. SERVICE MANUAL

STEREO CASSETTE
TAPE DECK
Model TA-63OD

TABLE OF CONTENTS

Item Page
Specifications I 2
Features 2
Block diagram 3
Exploded View 4
Component location 5
Circuit description 6
Mechanical operation 7

Disassembling instructions

Mechanism adjustment procedures 9
Electrical adjustment procedures 10
Service guide 12
Mechanism-exploded view 13
Printed circuit board view 15
Schematic diagram 17
PC board-parts list 19
Packing procedures 20

ON KYO®
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SPECIFICATIONS
Track Format: 4 track, 2 channels
Erase System: AC erase
Tape Speed: 4.3 crnlsec
Wow & Flutter: 0.048% (WRMS)
Fm PM and
Rewind Time: 90 sec (C60)

Frequency Rm: 30 ~ 15,000 Hz Normal tape
30 ~ 18,000 HzCrO, tape
30 ~ 18,000 Hz FeCr tape
Signal-«moi. Ratio: as an (FeCr tape; Dolby NRin,
Dolby Level)
W: 40
83R: 1
1C: 4
Under: 25 diodes, 3 LED
Input Terminals: f Microphone jacks 2
3 Minimum input level 0.3 mV
Input impedance SO kn
lOptimum mic impedance
200 :2 ~ 50 kn
Line in jacks 2
Minimum input level 50 mV
Input impedance 50 kn
DIN lacks 1
Minimum input level
0.1 mV/kn
input impedance 5 kn

FEATURES

Hid! Oirality Long Life "S 81 S" Sondust Head

Onkyos recently developed S & S" Sendust head (made
from a highly robust silicon/iron/aluminum alloy of out-
standing magnetic properties) plays a very big role in
achieving the high quality of sound reproduction in the
TA-630D. Extended frequency response (20 Hz ~ 18,000
Hz with chrome tapes) and an exceptionally wide dynamic
range make your recordings sound professional-like.

Built-in Awu-Bias Control

Optimum bias level is essential for really top grade record-
ings. But since the magnetic characteristerics of different
types of tape vary from brand to brand, the conventional
bias settings are only approximates. The Onkyo TA-630D
Accu-Bias control eliminates the approx, and ensures
you of superb results with every tape used, especially in
the high frequency region.

Dolby NR System with Switchable MPX Filter

Now a regular feature in all high grade cassette tape decks,
the Dolby NR system eliminatesmuch of the annoying
tape hiss from your recordings. And by also incorporating
the Dolby circuit in a highly reliable single-chip 2-channel
monolithic IC, outstanding channel balance is achieved.
Furthermore, a built-in MPX filter removes the pilot signal
from FM broadcasts for brilliant high quality recordings.

Built-in Dolby FM Decordor

With the TA-630D you will be right up to date for record-
ing of the increasingly popular Dolby FM broadcasts. No
need for an extra adaptor, or a new tuner/receiver
especially designed for Dolby FM. The improved S/N ratio
makes noise practically non-existent.

Output Jacks: Line out jacks 2
Standard output level
0.775 V (0 W)
Optimum load impedance
over 50 kn,

DIN Jack 1
Standard output level
0.775 V (0 VU)
Optimum load impedance
over 50 kn

Headphones 8 9 ~ 200 n

PLL Servo DC

For U.S.A. and Canada -
AC 120V160 Hz

For other countries

AC 110/120/220/240 V 50/60 Hz

or 240V 50 Hz.

Power Consumption: 13 W

Motor:
Power Supply:

Dimensions: 418(W) x 15801) x 297(D) mm
16-1/2" x 6-1/4" x 12"

Weight: 6 kg (13.2 lbs)

Accessories: Pin-Pin type connecting cords . . . 2

* Specifications and design are subject to modification
without prior notice for product improvement.

* Cabinet Composition: Embossed vinyl over metal.

Timer Switch for Automatic Recording or Morning Alarm
By simply connecting up to an audio timer, the TA-630D
will record those not-to-be-missed proyams even in
your absence. 0r then you may wish to substitute your
morning alarm with some of your favorite symphonies and
recording artists.

One-Touch Rec Mutiny for Clean Editing

This simple switch will make a big difference to your tape
recording and editing. Since tape transport will continue
in a no-signal recording mode, the interval between tunes
will be completely lient. Editing out of commercials will
also be swift and clean-cut.

Memory Rewind for Rapid Replay

After presetting the tape counter and memory rewind at a
particular section of the tape, a simple push of the rewind
rewind button will return the tape back to that point quick-
ly and accurately, saving considerable time and bother.

Separate 3-Way Bias and Equalization Selectors

The TA630D is designed to handle all major types of
cassette tapes available on the market today. And in com-
bination with the Accu-Bias control, optimum bias levels
are assured for every tape used.

Full Auto-Stop Mechanism _

Full automatic stop at the end of the tape safeguards both
tapes and tape transport from undue strain.

The TA-630D is also equipped with an electronically con-
trolled full auto-stop mechanism to ensure that no strain
whatsoever is applied to either tape or tape transpon-
system.

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EXPLODED VIEW

EXPLODED VIEW-PARTS LIST

1f;- PARTS NO. DESCRIPTION 'LEOFI- PARTS NO. DESCRIPTION
1 243095 NIND-0500895. VU meter 18 27267007 Guide (PUSH)
2 243096 NIND-0500596, VU meter 19 28198506 Facet
210045 011A, 6.3V, VU meter lamp 20 28198510 Facet
3 16449542 NAPL-542, Peak indicator p.c.b. 21 27300148 Window for counter
4 210034 RMS-GV-SO, Accu. indicator lamp 22 28320229 Knob, lever
5 210035 RMS-éVvSO, Rec. indicator lamp 23 28320226 Knob (R)
6 25040047 NLS-111-2715-L23P, Power 24 28320227 Knob (L)
switch (N) 25 28320225A Knob (OUT)
25040054 NLS-121-2725-L29, Power 26 28320228 Knob, push
switch (U) 27 28320256 Knob, volume
7 25045046 HL10264-01-070, Stereo 28 28320224A Knob, push
headphone jack 29 28320223A Knob, lever
8 5148031 N16RGC2KB25, Accu. control 30 28320222A Knob, lever
variable resistor 31 28320220A Knob, lever
9 27 110066 Front bracket 32 28320221A Knob, lever
10 27115027A Side bracket (N) 33 23184022 Top cover
2711502713 Side bracket (U) 34 838440109 4TTB+10C (BC)
11 27170023-1 Bottom board 35 27300088 Cassette cover
12 280379 Leg 36 27300089 Cassette plate
13 834130122 35TS+123Q, Tapping screw 37 2730009113 Cover
14 8 31430082 35TW+8 BQ(BC), Tapping screw 38 87005 2 Washer
15 27210104 From panel 39 801173A Decorative screw
16449121 Front panel assy
16 27267024A Guide (A) NOTE: N: U.S,A. model
17 27267025A Guide (13) U: Universal model