Technics SUA707 free download

File name Technics-SUA707 amp.pdf

Table Of Contents COVER 1 Before Repair 2 Protection Circuitry 3 Accessories 4 Caution for AC Mains Lead 5 Operations 6 Operation Checks and Component ReplacementProcedures 7 About the+/- 15 V Line Abnormality Detect Function 7.1 About the abnormality detect function with the operation LED turned off 8 Schematic Diagram 8.1 Schematic Diagram Notes 8.2 Schematic Diagram 9 Printed Circuit Board Diagram 10 Wiring Connection Diagram 11 Type Illustration of ICs, Transistors and Diodes 12 Block Diagram 13 Measurements and Adjustments 13.1 Measuring Instruments and Special Tools 13.2 Output Voltage Adjustment 14 Terminal Function of ICs 14.1 IC801 (M38503M2405F) : System Control 15 Replacement Parts List PV 16 Cabinet Parts Location PV 17 Packaging Service Manual TOP NEXT AD9908184C2 Stereo Integrated Amplifier SU-A707 Colour (K)...Black Type Areas (E)...Europe and Russia. (EB)...Great Britain. (EG)...Germany, France and Italy. © 1999 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. ·@ TOP NEXT 1 Before Repair TOP PREVIOUS NEXT 1. Turn off the power supply. Using a 10, 10 W resistor, connect both ends of power supply capacitors (C701, C702) 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 respectto supply voltage 230/240 V. Power supply AC 230 V, 50 AC 240 V, 50 voltage Hz Hz Consumed current 70-270 mA 60-260 mA ·@ TOP PREVIOUS NEXT 2 Protection Circuitry TOP PREVIOUS NEXT The protection circuitry may have operated if either of the following conditions is noticed: No sound is heard when the power is switched ON. Sound stops during a performance. The functions 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. If this occurs, follow the procedure outlined bellow: 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 ON again. ·@ TOP PREVIOUS NEXT 3 Accessories TOP PREVIOUS NEXT AC mains lead (E) and (EG) areas : (RJA0019-X)... 1 pc. (EB) area : (RJA0053-2X)...1 pc. Remote control transmitter (RAK-SUA11WH)...1 pc. Batteries (R6/LR6, AA, UM-3)...