Technics SUC 1000 Mk2 Service Manual

Page 1

ORDER NO. AD9707097CZ

Service Manual

Stereo Control Amplifier

Specifications (DIN 45 500) I

Total harmonic distortion
rated power at 20 Hz - 20 kHz
Input sensitivity/impedance

0.01 % (VOL. Max.)

PHONO MM" 2.5 mV/47 kn
MC 170 uwzzo o
TUNER, co, Aux, TAPE 1, TAPE 2 200 mV/22 kc

Phono maximum input voltage (1 kHz, RMS)

MM" 130 mV (IHF 66)
MC" 10 mV (IHF 66)

SIN
PHONO MM 78 dB (85 dB, IHF 66)

MC 64 dB (8 = 250 (N. 66 dB, IHF '66)
TUNER, CD, AUX, TAPE 1, TAPE 2 91 dB (100 dB, IHF 66)
Frequency response
PHONO MM FilAA standard curve i0.8 dB
(30 Hz - 15 kHz)
TUNER, CD, AUX, TAPE 1, TAPE 2 3 Hz - 80 kHz (+0, - 3 dB)
+0 dB, - 0.3 dB (20 Hz - 20 kHz)

Tone controls
BASS 50 Hz, +10 dB to -10 dB
TREBLE 20 kHz, +10 dB to -10 dB

SU-C1000AK7im2

Colour
(K) ...... Black Type

Areas
(E) ........ Europe.
(EB) ...... Great Britain.
(EG) ...... Germany.
Muting _ on
Output voltage
TAPE 1, TAPE 2 REC OUT 200 mV
PRE OUT 1, 2 1 V
Channel balance (AUX, 250 Hz - 6.3 kHz) :1 dB
Channel separation (AUX, 1 kHz) 50 dB
I GENERAL
Power consumption 10 W
Power supply AC 50 Hz, 230 V - 240 V
Dimensions (w x H x D) 430 x693 x307 mm
Weight 3.3 kg

Notes:

1. Specifications are subject to change without notice.
Weight and dimensions are approximate.

2. Total harmonic distortion is measured by the digital
spectrum analyzer.

AWARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not
contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or
repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

Technics

© 1997 Matsushita Electric industrial Co., Ltd.
All rights reserved. Unauthorized copying
and distribution is a violation of law.

Page 2

SU-C1000M2

I Contents

Before Repair ......
Protection Circuitry .
Accessories .........
Caution for AC Mains Lead
Connections ...................
Inserting the Rechargeable Battery
Power Supply .........
Front Panel Controls
Using Battery Power...
Checking the Battery Condition ..
Operation Check and

Main Component Replacement Procedures ............................. 10, 11

I Before Repair

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Page
Schematic Diagram .................................................................... 12 - 17
Printed Circuit Board Diagram .......................... 18, 19

Type Illustration of lC's, Transistors and Diodes.
Wiring Connection Diagram .
Block Diagram ...................
Terminal Function of lC's ............
Replacement Parts List (Electrical).
Replacement Parts List (Resistors and Capacitors)
Replacement Parts List (Cabinet, Packing and Accessories)
Cabinet Parts Location
Packaging ..................

(1)Tum off the power supply. Using a 10 Q, 10 W resistor, connect both ends of power supply capacitors (0651) in order to discharge

the voltage.

(2) Before turning the power supply on, after completion of repair, slowly apply the primary voltage by using a power supply voltage
controller to make sure that the consumed current at 50 Hz in NO SIGNAL mode should be shown below with respect to supply

voltage 230 V/240 v.

Power supply voltage

AC 230 v, so Hz

AC 240 V, 50 HZ

Consumed current

8~30mA

8-30mA

I Protection Circuitry

The protection circuitry may have operated if either of the following conditions is noticed:

I No sound is heard when the power is switched ON.
0 Sound stops during a performance.

The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are
shorted, or if speaker systems with an impedance less than the indicated rated impedance of this unit are used.

It this occurs, follow the procedure outlined below:

1. Switch OFF the power.

2. Determine the cause of the cause of the problem and correct it.
3. Switch ON the power once again.

Note:

When the protection circuitry functions, the unit will not operate unless the power is first switched OFF and then ON again.

I Accessories

0 AC power supply cord
(E) and (EG) areas: (RJA0019«2K) 1

(EB) area : (RJA0049-K) ....................... 1

0 Stereo connection cable

(SJP2276) ............................................. 1

0 Rechargeable battery* ......................... 1

0 Remote control transmitter
(RAK-SU228WH) ................................. 1

0 Batteries for remote control transmitter*
(UM-4, AAA, R03) .............................. 2

Note: *These are available on sales route.

Page 4

SU-C1000M2

l Connections

0 Make sure that the power supply for all components has been
turned off before making any connections.

OConnect the power cord to the amplifier only after all other con-
nections between components have been made.

Do not place this unit on top of another piece of equipment that
radiates heat (such as a power amplifier).

Stereo connection cable

White (L)
Red (n)

(R) (R)

Connect the power amplifier. (not included)

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PRE OUT 2 terminals: For connecting the second power amplifier. To improve the sound quality, connect two Technics SE-
A1000M2 power amplifiers to this unit. For details, see SE-A1000M2 Operating Instructions.

If connecting a graphic equalizer E
Connect it between the PFtE OUT terminals of this unit and the
INPUT terminals of the power amplifier.