Onkyo TA 2040 Service Manual

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SERIAL NO. 3071

ONKYOQ SERVICE MANUAL

STEREO CASSETTE
TAPE DECK
Model TA-204O

TABLE OF CONTENTS

Item Page

Specifications 2
Service procedures 2
Mechanism operation 3
Alignment procedures ' 4
Exploded View 6
Mechanism-exploded view 7

Printed circuit board View 9
Schematic diagram 1 1
Printed circuit board-parts list 14
Block diagram 15
Circuit description 15
Component location 17
Packing procedures 18

ONKYOQ
Alllllfl IIIIMPIINEHIS

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I \ 20-10

SPECIFICATIONS
Track System: 4-track 2-channel stereo
Recording System: AC bias
Erasing System: AC erase
Tape Speed: 48 cm/sec.
Wow and Flutter: 0.055% (WRMS)

Frequency Response: 20~15,000 Hz (Normal)
ZONl 7,000 HZ (High Position Tape)
20~19,000 Hz (Metal Position Tape)
Signal-to-Noise Ratio: Dolby NR out, 60dB (Metal Position
Tape)
A noise reduction of 10dB above
5 kHz and 5dB at 1 kHz is possible
with the Dolby NR [N
Input Jacks: Microphone Jacks: 2
Minimum input level 0.3 mV
Input impedance 5 k9
Optimum mic impedance
200 52 ~ 50 kSZ
Line In: 2
Minimum input level 50 mV
Input impedance 50 k9

Current consumption (motor)

Playback: 75 A 110 mA
Recording: 75 7 110 tnA
Fast forward: 90 - 120 mA
Rewind: 90 - 120 mA
Auto-Stop

PlaybackStop: 150 7 170 mA

SERVICE PROCEDURES

1. Voltage conversion (Universal model)

Outputs: Line Out: 2
Output level 0.480 V (at 0 dB)
Output impedance over 50 k9
Headphone Jack: 1

8 9/200 52
Motor: FG Servo DC Motor
Heads: Sendust Head
Components: TR: 43 Diodes: 19 IC: 8
LED: 5
Power Supply: AC 110/120/220/240 V

50/60 Hz, AC 240V 50 Hz, or
AC 120 V 60 Hz
Power Consumption: 25 W

Dimensions: 418 (W) X 120 (H) X 330 (D) mm
16-7/16 x 4-3/4 x 13"

Weight: 6.4 kg (14.1 lbs)

Accessories: Pin-type connecting cords: 2

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

Mechanism specifications

1) Tape speed: 4.8 cm/sec. (3 kHz +3%, 72%)
Use a standard test tape, WIT-658
(3 kHz) or equipment.

2) Wow and Flutter: Less than 0.055% (WRMS)

3) Take-up torque: 35 - 70 gr-cm

4) RF. torque: 60 - 120 gr-cm
5) Rewind torque: 60 - 120 gr»cm
6) Rewind time: Less than 110 sec. (use a C-60

cassette tape)
7) Automatic shut-off
time: Less than 5 sec.

This model is equipped with a universal power transformer to permit! operation at either power source of 110, 120. 220 or

240V AC 50/60Hz.

To convert the unit to a different power source voltage, change the plug as illustrated in the drawing below.
CAUTION: DISCONNECT POWER SUPPLY CORD FROM AC OUTLET BEFORE CONVERTING VOLTAGE.

VOLTAGE SELECTOR

l-----Fuse Holder For 110V Operation

2. Replacing the AC fuse (120V model)
1) Remove the top cover.
2) For continued protection against fire harard, replace
only with same type and same rating fuse.

<1§Q3 W %
e O O

For 120V Operation For 220V Operation For 240V Operation

- Fuseholder

Side bracket (L)