Technics SUA 600 Mk3 Schematics

Page 2

SU-AGOOMKS

I Contents

Beiore Hepair..,.
Protection Circuitry
Accessories
Function of IC Terminals .
Schematic Diagram .
Printed Circuit Board Diagram

2 Replacement Parts List
2 Resistors and Capacitors .
2 Packaging .......
3 Cabinet Parts Location.
a~9 Replacement Parts List

I Before Repair

(1) Turn oft the power supply. Using a 10 9, 10 W resistor, connect both ends of power supply capacitors (C701, 0702) 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 N0 SIGNAL mode should be shown below with respect to supply voltage 230 V-240 V.

Power supply voltage : AC 230 V =9 50~250 mA (Consumed current 50Hz)
Power supply voltage 2 AC 240 v => 40~240 mA (Consumed current 50Hz)

I Protection circuitry

The protection circuitry may have operated if either of the following conditions is noticed:
a: No sound is heard when the power is switched 0N.
*Sound stops during a performance.
The functions of this circuitry is to prevent circuitry damage it, for example, the positive and negative speaker connection wires are "shorted", or It
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 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

for (E). (EM) areas: (RJA0019-2K) for (EB) area: (RJA0049-K)