Onkyo TA 2066 Service Manual

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SERIAL NO. 3148

ONKYO® SERVICE MANUAL
STEREO CASSETTE
TAPE DECK
MODEL TA-2066

UDN,UDC,UD

120V AC, 60Hz

UGV, UG

220V AC, 50Hz

UW

120 or 220V AC, 50/60Hz

UOA, UOB

240V AC, 50H:

SAFETY-RELATED COMPONENT WARNINGII

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 COMPONENTS WITH ONKYO PARTS
WHOSE PARTS NUMBER AS SHOWN IN THIS
MANUAL,

MAKE LEAKAGE-CURRENT 0R RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.

ONKYO.
AIIIIIII BIIMI'IIIIIIIIS

SPECIFICATIONS

TrackFotmat:
Erasing System:
Tape Speed:

Wow & Fluner:
Frequency Response:

Signal-to-Noise Ratio:

Input Jacks:

4 trachs. 2 channels
AC erase
4.8 cm/sec. (1-7/8 ins.)
0.035% (WRMSI
20-11000 Hz
(25-16000 Hz :3 dB)
(normal position tape)
20-19,000 Hz
(ZS-18,000 Hz :3 45)
(high position tape)
20-21,000 Hz
(ZS-20,000 Hz 23 dB)
(metal position tape)
60 dB (Metal position tape,
Dolby NR out)
A noise reduction of 10 dB above
5 kHz and 5 dB atl kHz is possible
with Dolby B NR. A noise reduc-
tion of 20 dB at 5 kHz is possible
with Dolby C NR.
Line IN: 2
Minimum input level: 50 mV
Input impedanoe: 50 kohms

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Outpurs: Line OUT: 2
Std output level: 1100 mV
(0 dB)
Opt load impedance:
over 50 kohms
Headphones:
Opt impedance:
8 - 200 ohms
Motors: Direct-drive motor: 1
DC motor: 2
Heads: Rec/pb head: Special Hard Permalloy
Erase head: Ferrite
Semiconductors: TR: 87 Diodes: 42 IC: 18
LED: 15
Power Supply: A6120 V/GO Hz
Power Consumption: 40 watts

Dimensions: 435(W)x112(H)x 371(0) mm
(17-1/ x 4-3/8" x14-5/8")
Weight: 6.7 kg. (14.8 lbs.)

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

SERVICE PROCEDURES

1 . Replacing the lamps

This unit used the lamps listed below.

Circuit No. Parts No. Description

FL-101 210149 PL14V0.06AW3.0

PL7201-205 210165 PL14V150mA

PL-902 210165 PL14V150mA

Caution; Before replacing the lamps. be sure to unplug
the power supply cable.

2. Instruction resistance measurement

Connect the insulating-resistance tester between the

plug of power supply cord and chassis.

Specifications; D model 500 V 3,3i0.33 M52
G/W models 500 V more than 10 M9

3. Replacing the Dolby ICs

Because the TA-2066 is 3-head deck, it is equipped with a
4-channel Doiby processor. Two channels are used exclusively
for encoding and the other two exclusively for decoding. if
there is a difference between the performance of the encode
and decode sides, both Dolby B and C NR will not operate
properly. To prevent this, the TA»2066 employs the HA-
12038-01. The appearance is the same as the standard HA-
12308 with colored markings on the top surface of the IC.
When replacing the HA712038~01, the four ICs (0107,
0108, 0211, 0212) in the new one should all have the same
color markings. If ICs with the same color markings are not
available, the 0107-0211 and 0108-0212 colors should be
matched. That is, the two encode ICs and the two decode ICs
must always be of the same color although it is possible to use
different colors on the encode and decode sides when necei
ssary.

FEATURES

Newly Developed Accubias System

Onkyos most recent Accubias system not only provides
the optimum bias for any kind of cassette tape to assure flat
frequency response but also lets you adjust bias to obtain
other frequency response curves. The current frequency
response is displayed by an easy-to-read multivcolor
indicator and the bias setting is preserved until the Accubias
control knob is changed to a different bias setting.

Three Heads with Special Hard Permalloy

For Superior Metal Tape Performance

Having three heads means you can monitor the actual
recorded signal as you record instead of rewinding the

tape to check your recording afterward. The 3-head
system also has the advantage of making possible the use of
separate record and playback gaps, each optimized for its
own task. The special hard permalloy head formulation
boasts the high saturation flux density and abrasion
resistance needed for true metal tape compatibility.

3-Motor Silent Mechanism with DC

Servo-Controlled Direct-Drive Capstan Motor

The TA-2066 uses a highly accurate servo'controlled DC
motor to drive the capstan directly. This motor is com-
pletely unaffected by momentary fluctuations in voltage
and load to maintain outstanding stability and precision
at all times. Overall construction is simplified to maxi-
mize reliability and the vertical cassette holder further
contributes to stable and accurate tape travel. As a result,
wow and flutter is 0.035%, a figure that places the
TA~2066 among the best cassette decks on the market
today. Separate DC motors are used for the reel tables
and head assembly to optimize performance and provide
smooth and silent movement of the head base.

Dolby B and C Noise Reduction

Along with standard Dolby B NR, the TAA2066 also has

the even more effective Dolby C NR system. Dolby C NR
reduces tape background noise by 20 dB at 5 kHz, about

3 times more than Dolby B NR. In addition to its wide
band noise reduction, Dolby C NR uses a sliding band tech-
nique 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.

Auto Music Control System (A.M.C.S.)

The AMCS automatically locates the beginning of every
song on a cassette in either the forward or the reverse
direction. When AMCS FWD is pressed during the play
mode, tape is rapidly wound to the beginning of the
next song and the first 15 seconds (approximately) is
played. Then the tape is rapidly woundforward to the
beginning of the next song and about 15 seconds is
played. This process continues until the PLAY button
is pressed to cancel AMCS and return to normal playback.
When AMCS REV is pressed during the play mode, this
process is performed in the reverse direction.