KS-AX4500 SERVICE MANUAL POWER AMPLIFIER KS-AX4500 Area Suffix Continental Europe Northern America Caution If electricity is connected during disassembly, it must be a no load current. If it is load current, be sure to attach a heat sink to the power-amp IC. This will be damaged if the above precautions are not followed, as it does not have a sub heat sink attached to it.
KS-AX4500 ! CAUTION Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.
KS-AX4500 Location of main parts HEAT SINK CONTROL PANEL SWITCH KNOB VOLUME KNOB HEAT SINK REAR PANEL FUSE INPUT for POWER OUTPUT TERMINAL for REAR(L/R) OUTPUT TERMINAL for FRONT(L/R) LOW INPUT jack for REAR(R) LOW INPUT jack for FRONT(R) HEAT SINK...
KS-AX4500 HEAT SINK (Bottom view) GND wire MAIN PCB SUB PCB POWER TRANSISTER DIODE POWER FET POWER TRANSISTER MAIN PCB...
KS-AX4500 Removal of main parts CAUTION: If electricity is connected during disassembly, Bottom cover it must be a no load current. If it is load current, be sure to attach a heat sink to the power-amp IC. This will be damaged if the above precautions are not followed, as it does not have a sub heat sink attached to it.
KS-AX4500 Remove the 13 screws E retaining the panels on both sides of the main unit. Rear panel Fig. 5 Front panel Fig. 6 Remove the 14 screws F attaching the MAIN PCB to the bottom of the main unit.
KS-AX4500 Test method Check the voltage and frequency of the secondary FREQUENCY COUNTER toroidal coil. FREQUENCY:22.87kHz ± 50Hz VOLTAGE VALUE:60Vp-p ± 2.5V TEST SET POWER SUPPLY 14.4V MAIN PCB Measuring Points 2. Measure the secondary toroidal coil, if the standard frequency value of 22.87 kHz ±...
KS-AX4500 Description of major ICs PIN CONNECTIONS Noninv Noninv Input Input Input Input Compen/PWN V ref Comp Input Dead Time Output Control Control V CC Ground (TOP View) TL494 Oscillator Flip- Dead-Time Flop Comparator 0.12V 0.7V 4.9V 0.7mA Comparator Lockout...
KS-AX4500 VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK B.U. 10-1,1Chome,Ohwatari-machi,Maebashi-city,Japan Printed in Japan (No. 49622) 200104(S)