Technics SUA 200 Service Manual

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I GENERAL "0:
Total harmonic distortion is measured by the digital spectrum
pow consumption 20w analyzer (HP. 30455ystem).
Pomr supply AC120V SUHZ . . . . . .
Dimensions (W H x D) 430 x 125 x 360mm isrgzcggaggnts are subject to change Without notice for further
WOW 9.2kg Weight and dimensions shown are approximate.
I CONTENTS

Page Page
SAFETY PRECAUTION ....................... 2 SWITCH OF OPERATION "0201 ~ 203) ............ 11
LOCATION OF CONTROLS . . . . . . 3 TRUTH TABLE OF IC IIC703, 704, 708. 709) . . . 11
OPERATION ............ . . . . . . . 4 REPLACEMENT PARTS LIST (RESISTORSI ....... . . 12
BEFORE fiEPA'R ....... . _ _ , . 5 PRINTED CIRCUIT BOARDS . . . . . ............ 13
DISASSEMBLY INSTRUCTIONS , . . , 5 WIRING CONNECTION DIAGRAM .. . . .17
FEATURES ............ . . . .............. . ..... .. 7 SCHEMATIC DIAGRAM . . . ............. . . 20
FUNCTION OF TERMINAL IAnIlog Function CIRCUITS TO BE CHANGED AND THE AREAS ....... 28

Control IC701 :MD75060T209) . REPLACEMENT PARTS LIST (CAPACITORS,

BLOCK DIAGRAM .......... . . . . ELECTRONIC PARTS, MECHANICAL PARTS) ..... 30
BASIC OPERATION OF BGV SELECTOR EXPLODED VIEW ............................ 32

CONTROL CIRCUIT (K3707) ................ 11

I SAFETY PRE CAUTION (This safety precaution " is applied only in U.S.A.)

Before servicing, unplug the power cord to prevent an electric shock.

When replacing parts, use only manufacturer's recommended components for safety.

Check the condition of the power cord. Replace if wear or damage is evident,

After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields. etc.

Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to
prevent the customer from being exposed to a shock hazard.

VPFAN.

- INSULATION RESISTANCE TEST

1. Unplug the power cord and short the two prongs of the plug with a jumper wire.

2. Turn on the power switch.

3. Measure the resistance value with ohmmeter between the jumpered AC plug and each exposed metal cabinet part, such as
Screwheads antenna, control shafts, handle brackets, etc. Equipment with antenna terminals should read between 3M9
and 5.2MQ to all exposed parts. (Fig. A) Equipment without antenna terminals should read approximately infinity to
all exposed parts. (Fig. B)

Note: Some exposed parts may be isolated from the chassis by design. These will read infinity.

Antenna
terminal \in I

Exposed J Exposed
metal metal
part part
Ohmrneter Ohmmeter
(FiglAi (Fig, 5)
Resistance = 3MQ-5.2MQ Resistance: Approx 00

4. If the measurement is outside the specified limits, there is a possibility of a shock hazard. The equipment should be
repaired and rechecked before it is returned to the customer.

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