TANDBERG 3002 User manual

TANDBERG”
Control
Amplifier
3002
Circuit Diagrams and
Alignment Instructions
TANDBERG*— The European Alternative

Dismantling
@ Top cover, rear (1). @ Front panel (4). Remove rotary knobs.
@ Bottom cover (5).
@ Top cover, front (2).
@ Rear panel (3).
Figure 1 Dismantling the rear and top covers
Figure 2 Dismantling the front and bottom covers

ALL BOARDS ARE SEEN FROM THE SOLDER SIDE.
TEST POINTS FOR AC-VOLTAGES IN COLOUR.
Figure 3 Connector board
AC voltages
The table below gives AC voltages for the test
points in Figures 3 and 4.
Test conditions
Signal: 1000 Hz.
Volume controls: Max. position.
Tone controls: Mid. position.
Balance control: Mid. position.
Test points with input signal voltages
3 4
2mvV 0.16 mV
16 mV
145 mV
1.0 V
Test points with AC voltages are also given in the
diagrams on pages 4 and 5.
145 mV (1)*
145 mV (2)*
145 mV (5)*
145 mV (6)*
1.0 V
Test points with signal voltages
The numbers in parantheses indicate the
corresponding input test points.
Figure 4 Input RIAA board
13] 1 | 21 19 17 | 15
14 12 22 20 18 16

TOV
145 mV
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3 <
5
145 mV
6
145 mV
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Figure 5
Circuit diagram, input amplifiers
Q201
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(22k |
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[220k]
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TEST POINTS WITH AC - VOLTAGES IN COLOUR

HEADPHONE
VOLUME
115/230V-~
50/60Hz
MPSU 06
+32 VDC
CR610
2/
3|
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2x1N4004
Q617
BC 4858
FUSE
230¥ 1T200mA
115V T&00mA POWER
TOTAL 300W ee | Cc}
SWITCHED
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Figure 6 Circuit diagram, headphones amplifier, tone controls and power supply TEST POINTS WITH AC - VOLTAGES IN COLOUR

Figure 7 Selector board
AC voltages
The table below gives AC voltages for test points in
Figures 7 and 8. 7
Test points with input signal voltages
1—2-—5-6 3 4
145 mV 2mV 0.16 mV
@ \
>)
8 5
re 145 mV
3 1.0 V
= 145 mV
s 1.0V
3 145 mV
12 V unloaded
2 145 mV
2 12 V unloaded
Jn
Test conditions
Signal:
1000
Hz.
Volume
controls:
Max.
position.
Tone
controls:
Mid.
position.
Balance control: Mid. position.
Test points with AC voltages are also given in the
diagrams on pages 4 and 5.
Figure 8
Figure 9
AC outlet board
ALL BOARDS ARE SEEN FROM THE SOLDER SIDE.
TEST POINTS FOR AC-VOLTAGES IN COLOUR.

+ 32.0 V DC — 32.0 V DC
Figure 10 Power supply board
Adjusting the supply power (+ 32 V)
@ Adjust R611 for + 32.0 V at pin 7, J503
(Figure 10).
@ Adjust R612 for — 32.0 V at pin 4, J503
(Figure 10).

Tandberg Control Amplifier TCA 3002
Technical data
Power requirements:
Power consumption: 30 W max. Preamp:
AC-outlets: Unswitched 1 Headphones:
Switched 3 Headphones (min. load):
Dimensions: Width 17 1/8” (43.5 cm) Tone-control Response
Depth 13%" (35.0 cm) Bass:
Height 3%" ( 8.3 cm) Treble:
Weight 12.5 Ibs (5,7 kg) Loudness:
Technical Data according to IHF-A-202, 1978 Filter
Sub Sonic:
Frequency response
Phono MM: 20 — 20,000 Hz + 0.2dB Crosstalk (100 Hz — 10 kHz)
Phono MC: 20—20,000Hz + 0.2dB Phono MM:
Tape 1, Tape 2: 20 — 20,000 Hz + 0/— 0.1 dB Phono MC:
Tuner, AUX: 20 — 20,000Hz. +0/—0.1dB Tape 1, Tape 2:
Tuner, AUX:
Maximum Voltage Output
Preamp output:
Preamp output:
Tape 1, Tape 2:
Headphone output:
Secondary Disclosures
115/230 V £10%, 50/60 Hz Output Impedance
5 Vat THD = 0.004%
10 Vat clipping level Phono MM:
7.5V Phono MC:
20 V unloaded Tape 1, Tape 2:
Separation (100 Hz — 10 kHz)
560 ohms + 10 uF in series
470 ohms
4 ohms
+ 10 dB at 50 Hz
+ 10 dB at 10,000 Hz
Max. 7 dB at 50 Hz
Max. 3 dB at 10,000 Hz
— 12dB/oct., —3dB at 15 Hz
To any of the other sources > 70dB
To any of the other sources > 70dB
To any of the other sources — 70 dB
To any of the other sources > 70dB
> 53 dB
> 53 dB
> 58 dB
> 58 dB
Immeasurable
5 — 130,000 Hz, + 0/— 1.5 dB
5 — 130,000 Hz, + 0/— 1.5 dB
+ 9,5°/—2.5°
+ 9,5°/—2.5°
@ Specifications are subject to change for further
— Black acrylic side walls for freestanding units.
Tuner, AUX:
Total Harmonic Distortion (20 Hz — 20,000 Hz)
Phono MM: < 0.004% Transient intermodulation
Phono MC: < 0.004% All inputs:
Tape 1, Tape 2: < 0.004%
Tuner, AUX: < 0.004% :
Other Technical Data
Input Sensitivity — Ref. 0.5 V output voltage
Phono MM: 1mvV Frequency Response
Phono MC: 80 uV Tape 1, Tape 2:
Tape 1, Tape 2: 70 mV — Tuner, AUX:
Tuner, AUX: 70 mV
Phase shift (20 Hz — 20,000 Hz)
A-weighted Signal-to-Noise Ratio Tape 1, Tape 2:
Phono MM: 80 dB Tuner, AUX:
Phono MC: 74 dB
Tape 1, Tape 2: 95 dB
Tuner, AUX: 95 dB
Maximum Input Voltage (1 kHz) : :
Phono MM: 290 mV improvement without notice.
Phono MC: 22 mV
Tape 1, Tape 2: 11 V
Tuner, AUX: 11 #V
Input
Impedance
Optional
Extras
Phono MM: 33 / 47 / 100 kohms
Phono MC: 1 kohm
Tape 1, Tape 2: 47 kohms
Tuner, AUX: 47 kohms
— Attachment sets for installation in 19 inch racks.
TANDBERG’
The European Alternative
Tandberg A/S, Post Office Box 53, 2007 Kjeller, Norway
1737-8-80 Part No. 714138
Printed in Norway by Reclamo A/S
© Tandberg A/S 1980