Onkyo TA 2070 Service Manual
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Extracted text from Onkyo TA 2070 Service Manual (Ocr-read)
Page 1
ONKYO. SERVICE MANUAL
STEREO CASSETTE
TAPE DECK.
TA-2060 TA-2070
TABLE OF CONTENTS
Item Page
Specifications
Features
Common modes of operation
Adjustment procedures
Service procedures
Exploded view
Mechanism-exploded view
Record and playback amplifier pc board view
(OWN-DIODOOM
from bottom side {220V model) 1 1
Control pc board view from bottom side 14
Record and playback amplifier pc board view
from bottom side (120V model) 15
Line amplifier pc board View from bottom side -' 18
Back tension and motor control pc board view from bottom side 19
Connection diagram for motor control pc board " 19
Power supply pc board view from bottom side 20
Semiconductor view 20
Component location 21
Packing procedures 22
ON KYOG
Alllllll IIIIMPIINENIS
Page 2
-20
SPECIFICATIONS
1 20V model
Track System:
Recording System:
Erasing System:
Tape Speed:
Wow and Flutter:
Frequency Response:
Signal-to-Noise Ratio:
Input Jacks:
Outputs:
Motor:
Heads:
Components:
Power Supply:
Power Consumption:
Dimensions:
Weight:
Accessories:
4-track, 2~channel stereo
AC bias
AC erase
4.8 cm (sec.
O:O4% (WRMS)
20 ~17,000 Hz (20 -16.000 Hz a 3 dB)
(normal position tape)
20 -19,000 Hz (20 -17,000 Hz i 3 (18)
(high position tape)
20 - 21,000 Hz (20 -19,000 Hz 3 3 dB)
(metal position tape)
60 dB (Dolby NR out, metal position tape)
A noise reduction of 10 dB above 5 kHz and
5dB at 1 kHz is possible with the Dolby NR in
Microphone Jacks: 2
Minimum input level: 0.3 mV/600n
Input impedance: 5 kn
Optimum mic impedance: soon - 50 kn
Line In: 2
Minimum input level: 50 mV
Input impedance: 50 kn
Line Out: 2
Ontput level: 1:1 V (at 0 dB)
Optimum load impeadance: over 50 kn
Headphone Jack: 1 8n - 2009
2 Motor System
DD Motor: 1
DC Motor: 1
Rec/PB head: Sendust combination head
Erase: Ferrite head
TR: 69 Diodes: 46 (C: 16 LED: 9
120 Vl60 Hz
35 W
418(W)x120(H)X 330(D) mm
16-1/2" x 4-3/4" x13"
5.5 kg (14.3 lbs.)
Pin-type connecting cords: 2
" Specifications and external appearance are subject to change
without notice because of product improvements.
Mechanism
Back Tension:
Play Torque:
F.F Torque:
Rewind Torque:
Auto-Stop Time:
9159N?
ssh
Rewind Time:
Timer-Start Time:
3 -69-cm
38-45 g-cm
70- 140 g-cm
70 -1409-cm
less than 4.5 sec. (Play)
less than 2.5 sec. (FF/Rewind)
less than 5 sec.
less than 90 sec. (Use a C-60 cassette tape)
Other model
Track System:
4-track, 2~channel stereo
Recording System: AC bias
Erasing System: AC erase
Tape Speed: 4.8 cm/sec.
Wow and Flutter: 0,04% IWRMS)
Frequency Response:
Signal-to-Noise Ratio:
20 - 17,000 HZ (20 -16,000 Hz 2 3 dB)
(normal position tape)
20 -19,000 Hz (20 --17,000 Hz 1 3 dB)
(high position tape)
20 - 21,000 Hz (20 - 19,000 Hz : 3 dB)
(metal position tape)
60 dB (Dolby NR out, metal position tape)
A noise reduction of 10 dB above 5 kHz and
5:18 at 1 kHz is possible with the Dolby NR in
Input Jacks: Microphone Jacks: 2
Minimum input level: 03 mV/GOOn
Input impedance: 5 kn
Optimum mic impedance: soon - 50 kn
Line In: 2
Minimum input level: 50 mV
Input impedance: 50 kn
DIN Jack: 1
Minimum input level: 0.1 mV/1 kn
Input impedance: 1 kn
Outputs: Line Out: 2
Output level: 1.1 V (at 0 dB)
Optimum load impedance: over 50 kn
DIN Jack: 1
Standard output level: 1.1 V (at 0 dB)
Optimum load impedance: more than
50 kn
Headphone Jack: 1 8n - 200::
Motor: 2 Motor System
DD Motor: 1
DC Motor: 1
Heads: Rec/PB head: Sendust combination head
Erase: Ferrite head
Components: TR: 74 Diodes: 49 IC: 16 LED: 9
Power Supply:
Power Consumption:
220 V/50 Hz, 120/220 V
50/60 Hz or 240 V/SO Hz
35 W
Dimensions: 418(W) x120(H)x 330(D) mm
164/?" X 4-3/ " X 13"
Weight: 6.5 kg (14.3 lbs.)
Accessories:
Pin-type connecting cords: 2
' Specifications and external appearance are subject to change
without notice because of product improvements.
Current Consumption
Real motor Cannon motor
PLAY 180 mA 110 mA
FF 1 10 mA --
FIEW 110 mA 1 10 mA
AUTO PLAY 190 mA 120 mA
STOP FF. new 120 mA _
Page 9
MECHANISM-EXPLODED VIEW
REF. NO. PARTS NO. DESCRIPTION REF. NO. PARTS NO. DESCRIPTION REF. NO. PARTS NO. DESCRIPTION REF. NO. PARTS NO. DESCRIPTION
1 24610491 Chassis ass'y 23 82512304 M2.3x4, Bind screw . 45 24610497 Pinch arm ass'y 69 24610516 Spacer
2 24610376 Rubber, brake 24 24601054 Reel motor 46 24605244 Spring 70 24605246 Spring
3 24603130 Lever, chrome tape detector 25 24610373 Catcher, spring 47 8930201 Circlip 71 833130129 3x12, Pan head screw
4 24603128 Deal" switch, record preventing 26 24610374 Washer 48 24610498 Holder, lamp 72 24602099 Belt, counter
5 32112004 mzx4, Pan head machine screw 27 24605194 Spring 49 24606107 50mA. 8V, Lamp 73 833125059 2.5x5, Pan head screw
6 24610492 Chassis, head 28 82512603 M2.6x3, Bind screw 50 24610345 Lock plate 74 24610508 Damper
7 24600024 Head. record and playback 29 24602076 Lever, idler 51 24610344 Collar 75 24610514 Clip link
8 24605243 Spring 30 24601052 Pulley, motor 53 833125089 2.5x8, Pan head screw ' 76 24606105 Hall 1C p.c.br
9 24610495 Nut, head azimuth 31 24610375 Felt 54 24610499 BraCket, side 77 24606104 Leaf switch
10 24600025 Erase head ' 32 801221 Screw 55 24610452 Washer 78 24610509 Case, reel platform
11 24610493 Spacer 33 24605183 Spring, cassette holding 56 24610500 Lever, canceller 80 24610519 Brake assy
12 82512012 Bind screw 34 801176 Pan head screw 57 24605245 Spring 82 863730 M3, Nut
13 24610351 Steelball 35 24605193 Spring 58 8930302 E3, Circlip 83 24602100 Belt
14 24610350 Stopper 36 24602098 Take-up reel 59 24610501 Holder, cassette 84 24602101 Pulley
15 24606098 Solenoid 3 7 246 10349 Washer 60 24610502 Holder, cassette 85 24610512 Magnet
16 24603131 Lever. head 38 24601055 Capstan motor 61 24610503 Mount plate . 86 24602102 Reel, supply
17 24610369 Pin, spring 39 24606106 Motor and back tension control p.c.b. 62 835426082 2.6x8, Tapping screw 87 24605183 Spring
18 223848 GPOBB, Diode 40 24610377 Insulator washer 63 24610504 Plate 33 24610515 (132-5. Washer
19 801220 M3x6. Pan head screw with spring washer 41 24610279 3o. steelball 64 24610505 Tube ' 39 24505247 Spring
20 24610372 Bracket, motor 42 24610496 Plate, head pressure 65 833225059 Screw 90 24510517 Cap
21 246103 71 Case, reel platform 43 801181 M2.6x6, Pan head screw 66 24610506 Bracket ass'y, cassette holder 91 24610518 Cap
22 24610494 Bobbin ass'y 44 801178 M2.6x8, Pan head serew 67 24610507 Bracket, side 93 24601056 Reel motor/Idler assy (20.14~32)
._9_ ~10-