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JVC KS-AX4500 Service Manual

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SERVICE MANUAL

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.
Contents
Safety precaution
Location of main parts
Removal of main parts
Test method
Description of major ICs

POWER AMPLIFIER

KS-AX4500
1-2
1-3
1-5
1-7
1-8
COPYRIGHT
2001 VICTOR COMPANY OF JAPAN, LTD.
KS-AX4500
Area Suffix
Continental Europe
E
J
Northern America
No. 49622
Apr. 2001

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  Summary of Contents for JVC KS-AX4500

  • Page 1: Service Manual

    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.
  • Page 2 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.
  • Page 3: Location Of Main Parts

    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...
  • Page 4 KS-AX4500 HEAT SINK (Bottom view) GND wire MAIN PCB SUB PCB POWER TRANSISTER DIODE POWER FET POWER TRANSISTER MAIN PCB...
  • Page 5: Removal Of Main Parts

    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.
  • Page 6 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.
  • Page 7: Test Method

    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 ±...
  • Page 8: Description Of Major Ics

    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...
  • Page 9 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)
  • Page 10: Parts List

    KS-AX4500 PARTS LIST KS-AX4500 * All printed circuit boards and its assemblies are not available as service parts. Areas suffix E ------------ Continental Europe J -------------- Northern America - Contents - Exploded view of enclosure assembly and parts list Electrical parts List...
  • Page 11: Exploded View Of Enclosure Assembly And Parts List

    KS-AX4500 Exploded view of enclosure assembly and parts list Block No. 15 14...
  • Page 12 KS-AX4500 Parts list ( Enclosure assembly ) Block No. M1MM Item Parts number Parts name Q'ty Description Area MA-HS-IT-1123-1 MAIN HEAT SINK MA-FP-IT-6411-1 FRONT PANEL REAR PANEL MA-RP-IT-6412-1 MA-BC-IT-6415-2 BOTTOM COVER CONTROL PANEL MA-SD-06-1924-0 MA-TC-03-1122-0 PIPE MA-TC-04-1922-0 TOP PANEL VOLUME KNOB...
  • Page 13: Electrical Parts List

    KS-AX4500 Electrical parts list Electrical parts list (P.C.board) Block No. 01 Item Remarks Parts number Parts name Area Item Parts number Parts name Remarks Area C 01 ELE10UF/16V E.CAPACITOR ELECTROLYTIC C 139 ELE100UF/16V E.CAPACITOR ELECTROLYTIC C 03 MAL105J/50V M.CAPACITOR MYLAR 63V 5%...
  • Page 14 KS-AX4500 Electrical parts list (P.C.board) Block No. 01 Item Remarks Item Parts number Parts name Remarks Area Parts number Parts name Area C 316 MAL473J/50V M.CAPACITOR MYLAR 50V 5% D 02 1N4004 DIODE RECTIFIER C 317 MAL473J /50V M CAPACITOR...
  • Page 15 KS-AX4500 Electrical parts list (P.C.board) Block No. 01 Item Remarks Parts number Parts name Area Item Remarks Parts number Parts name Area Q 203 KTA1266GR TRANSISTOR SMALL SIGNAL PN R 43 CAR1/4WJ220 RESISTOR CARBON FILM 1/4 Q 204 KTA1266GR TRANSISTOR...
  • Page 16 KS-AX4500 Electrical parts list (P.C.board) Block No. 01 Item Remarks Item Parts number Parts name Remarks Area Parts number Parts name Area R 154 CAR1/5WJ56K RESISTOR CARBON FILM 1/5 R 309 SMD1/5WF1.3K RESISTOR SMD 0805 1/5WF R 155 MET1/2WJ4.7 RESISTOR...
  • Page 17 KS-AX4500 Electrical parts list (P.C.board) Block No. 01 Item Remarks Parts number Parts name Area R 421 SMD1/5WJ30K RESISTOR SMD 0805 1/5WJ R 422 SMD1/5WJ30K RESISTOR SMD 0805 1/5WJ R 423 SMD1/5WJ30K RESISTOR SMD 0805 1/5WJ R 424 SMD1/5WJ62K RESISTOR...
  • Page 18: Packing And Accessories

    KS-AX4500 Packing and accessories Block No. Block No. A1,A2,A7,A8...
  • Page 19: Packing Parts List

    KS-AX4500 Packing parts list Block No. M2MM Item Parts number Parts name Q'ty Description Area MA-GB-02-6419-0 GIFT BOX MA-SN-07-1116-0 CUSHION MA-PB-01-1039-0 POLY BAG-A MA-PB-01-1524-1 POLY BAG-D POLY BAG-B MA-PB-01-1715-0 MA-PB-01-4101-0 POLY BAG-C PAPER SPACER MO-FI-01-8087-0 MA-IN-02-8090-0 FLAT PAD Accessories parts list Block No.
  • Page 20: Circuit Block Diagram

    KS-AX4500 Circuit block diagram...
  • Page 21 KS-AX4500 MEMO...
  • Page 22: Standard Schematic Diagrams

    KS-AX4500 Standard schematic diagrams MAIN PCB [1/3] and SUB PCB circuit diagrams 20Ax2 TM0006-00 A1023Y 10/0.25W CL-310 UC400962 CHASSIS 104(M) 4.7K 10/16V 1N5404 130KF 4.7K 104P 104P 104P C3198GR 51KF 105(M) 104P 4.7K 473P 1N4004 CHASSIS 220/2W 1.2K FR154 +15V...
  • Page 23 KS-AX4500 MAIN PCB [2/3] and SUB PCB circuit diagrams +15V R333 R337 R343 C333 Q305 R334 +15V 22/16V Q301 A1268GR Q310 5.6K Q308 C335 +15V Q302 C3198GR D998 C1027Y 150P C314 104(M) PROTECTION C391 C3198GR +15V +15V C394 Q312 104P...
  • Page 24 KS-AX4500 MAIN PCB [3/3] circuit diagrams +15V R137 R143 R133 R134 C133 Q105 +15V 5.6K 22/16V Q101 A1268GR Q110 Q102 Q108 C135 +15V C3198GR C3198GR D998 C1027Y 150P C114 104(M) PROTECTION C191 +15V +15V C194 104P Q112 R152 U104A 473P 4558F 1.5K...
  • Page 25: Printed Circuit Boards

    KS-AX4500 Printed circuit boards MAIN PCB Surface side view KS-AX4500 PPM028-01 REV.0 R263 R163 TH01 C191 J116 C205 C105 C291 JA02 BJ05 BJ06 COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT...
  • Page 26 KS-AX4500 Bottom side view COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT...
  • Page 27 KS-AX4500 SUB PCB (Volume board) Surface side view COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT KS-AX4500 KS-AX4500 SW301 SW101 HP03 PPS-037-01 HP04 REV.0 HP02 HP01 VR301 VR302 VR102 VR101 Bottom side view COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT...