Onkyo TA 2200 Service Manual

Page 1

ONKYO
STEREO

TA-2200

SEFIIAL NO. 3326

SERVICE MANUAL
CASSETTE

TAPE DECK
MODEL TA-2200

Black model

I UD,UD®

IZIIV AC . 6(IHZ

U G

220V AC. SUHZ

UW

[20 or 220V AC. 5(I/6IIHZ

UQA. UQB

240V AC. SUHZ

SAFETY-RELATED COMPONENT WARNING)!

COMPONENTS IDENTIFIED BY MARK A 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.

SPECIFICATIONS

Track Format: 4vtracks, 2-channels
Erasing System: AC erase

Tape Speed: 4.8 cm/sec. (1-7/8 i.p.s.)
Wow and Flutter: 0.07% (WRMS)

ON KYO.
I AIIIIIII IIIIMPIIIIIIIIS

Frequency Response: 20717,000Hz (Normal)
I30-16,000Hz :BdB)
20-18.000Hz IHigh)
(30-1 7,000H2 t3dB)
20-19,000Hz (Metal)
(SCI-18,000Hz :3dB)
S/N Ratio: 58:18 (metal tape, Dolby NR off)
A noise reduction of 10dB above 5kHz
and 5dB at 1kHz is possible with Dolby B
NR. A noisy reduction of 20:13 at 5kHz is
possible with Dolby C NR.
Input Jacks: Line IN: 2
Input sensitivity: 60mV
Input impedance: 50kohms
Outputs: Line OUT: 2
Standard output level: SOOmV IOdB)
Optimum load impedance: over
50 kohms
Headphone jack: 1
Optimum load impedance: 8 to 200

ohms
Motors: DC servo motor: 1
DC motor: 1
Heads: REC/PB: Special Hard Permalloy x 1;

Erase head: Ferrite x 1
Power Supply Rating: U.K. and Australian models:

AC 240V, 50Hz

USA. and Canadian models:

AC 120V, 60Hz

Worldwide models:

AC 120V and 220V switchable, 50/60H2
Power Consumption: 19 watts

Dimensions: 435 (W) x 122IH) x 262(D) mm
(17-1/8" x 4-13/16" X1015/16")
Weight: 4.4 kg. (9.7 |b5:)

HIE-146T Remote Control Transmitter
IU.S.A. and Canadian models only)

Transmitter: Infrared

Signal Range: Approx. 5 meters (15 feet)

Power Supply: Two AAA batteries

Dimensions: 38(WI x 150(Hl x 15.3(D) mm
(1-1/2" x 5-7/8" x 5/8)

Weight: 62 grams (2.2 oz.) (including batteries)

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

_1_

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TA-220

REC/PB level ->

SERVICE PROCEDURES

1. Replacement of power supply cord

There are two power supply cord outlets on the strainrelief.
insert them in prescribed direction to ensure safety. AS-UC-
3 (UD model) should be inserted lengthwise and
other types of cords should be inserted horizontally.

Power Supply Cord Power Supply Cord

Horizontal

length wise . _
direction

leEEllOn

2. Insulating resistance measurement

Connect the insulating-resistance tester between the plug of
power supply cord and chassis.

Specifications: 500V more than lOMSt

HX PRO CIRCUIT OPERATION
EXPLANATION

I. Regarding recording frequency characteristic and bias
Ordinarily. if the recording bias current is increased. REC/PB
frequency response level in the high frequency region (about
1(IKHZ and above) drops. and if the bias is decreased. the
response rises,

Fllse

Drop Bias decrease? 1
6
>
\ 4- 9 fl
Bias increase E
5
Frequency - E Frequency ->

2. Regarding the basic operation of HX PRO (Refer to Fig. 1)
The HX PRO uses the p. PC|297CA 1C. The operation is
in accordance with the following.

I) At (a). the recording bias is added onto thc audio signal.
and the recording signal is detected. This is the same as
the recording head recording the signal on the tape.

2) The signal of I) preserves the frequency response with
the integrated circuit of (h).

g ___ R433 + R42 2 I

2n >< R433>< R431 ( ' )

By means of the frequency of Fig. l, the frequency which
is effective from the beginning is determined, In the
ordinary situation. this is half the audio hand (IUKHZ).
(litKHz ~ 7.5KHz).

3) At (e), in order to use the affected waveform after-ward.
absolute detection is carried out.

Frequency

4) At (d), the waveform peak value is detected. The output
becomes the peak DC voltage.

5) At (e). the standard voltage and the voltage of (4) are
compared.

6) With the output of (e). the frequency generation level is
controlled (voltage controlled amplifier). That is. the bias
size is varied,

7) Summing up 1) ~ 6):

At (a). the time constant (frequency) that is detected in
the recording signal is preserved, and above a certain
frequency and above a certain level, the VCA controls
the bias current by causeing its reduction. When this is
done. in the mancr shown in the explanation of Item I
above, the frequency high region is raised. With this
control, the audio signal is instantaneously dealt with.

3. Regarding the operating conditions of the X PRO

I) With equation (2. I) noted above. the effect begins at the
frequency thus determined.

2) Above a certain level the effect begins.
(Substantially (I dB: In the vicinity of SUOmV line out)
The audio signal component level is dependent upon the
waveform after point (e).