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JVC KS-AX4700 Service Manual

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3 7 63 1515 0

SERVICE MANUAL

TE
L 13942296513
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
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http://www.xiaoyu163.com

POWER AMPLIFIER

KS-AX4700
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COPYRIGHT
2001 VICTOR COMPANY OF JAPAN, LTD.
http://www.xiaoyu163.com
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KS-AX4700
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Area Suffix
Continental Europe
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Northern America
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No. 49621
9 9
9 9
Apr. 2001

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  Summary of Contents for JVC KS-AX4700

  • Page 1: Service Manual

    KS-AX4700 3 7 63 1515 0 SERVICE MANUAL POWER AMPLIFIER KS-AX4700 L 13942296513 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-AX4700 3 7 63 1515 0 ! 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. L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 3: Location Of Main Parts

    KS-AX4700 3 7 63 1515 0 Location of main parts HEAT SINK CONTROL PANEL SWITCH KNOB VOLUME KNOB L 13942296513 HEAT SINK REAR PANEL FUSE INPUT for POWER OUTPUT TERMINAL (L/R) LOW INPUT (R) HEAT SINK FRONT PANEL u163 LOW INPUT (L) http://www.xiaoyu163.com...
  • Page 4 KS-AX4700 3 7 63 1515 0 HEAT SINK (Bottom view) GND wire MAIN PCB SUB PCB DIODE POWER TRANSISTER L 13942296513 POWER TRANSISTER POWER FET u163 http://www.xiaoyu163.com...
  • Page 5: Removal Of Main Parts

    KS-AX4700 3 7 63 1515 0 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.
  • Page 6 KS-AX4700 3 7 63 1515 0 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-AX4700 3 7 63 1515 0 Test method Check the voltage and frequency of the secondary FREQUENCY COUNTER toroidal coil. FREQUENCY:36.0kHz ± 50Hz VOLTAGE VALUE:75Vp-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 36.0 kHz ±...
  • Page 8: Description Of Major Ics

    KS-AX4700 3 7 63 1515 0 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 L 13942296513 (TOP View) TL494 Oscillator Flip- Dead-Time...
  • Page 9 KS-AX4700 http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 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. 49621) 200104(S) http://www.xiaoyu163.com...
  • Page 10: Circuit Block Diagram

    KS-AX4700 3 7 63 1515 0 Circuit block diagram L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 11 KS-AX4700 3 7 63 1515 0 MEMO L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 12 KS-AX4700 3 7 6 3 1 5 1 5 0 Standard schematic diagrams MAIN PCB [1/2] and SUB PCB circuit diagrams TM0006-00 A1023Y 10/0.25W CL-310 UC400650 CHASSIS 130KF 105(M) 10/16V 4.7K 1N5404 4.7K C3198GR 473P 473P 473P 104P 51KF...
  • Page 13 KS-AX4700 3 7 6 3 1 5 1 5 0 MAIN PCB [2/2] circuit diagrams +15V R137 R143 R133 Q108 Q109 C2690A C2690A C133 R134 Q105 +15V 10/16V Q102 5.6K Q101 A1023Y C135 +15V Q112 C3198GR C3198GR 150P D998...
  • Page 14 KS-AX4700 3 7 6 3 1 5 1 5 0 Printed circuit boards MAIN PCB Surface side view KS-AX4700 PPM027-01 COMPONENT COMPONENT COMPONENT COMPONENT REV.0 R250 R249 C202 C204 SUB1 R201 R205 1 3 9 4 2 2 9 6 5 1 3...
  • Page 15 KS-AX4700 3 7 6 3 1 5 1 5 0 Bottom side view R250 R249 C204 R205 R201 C291 R202 1 3 9 4 2 2 9 6 5 1 3 C191 COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT...
  • Page 16 KS-AX4700 3 7 6 3 1 5 1 5 0 SUB PCB (Volume board) Surface side view COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT...
  • Page 17 KS-AX4700 3 7 6 3 1 5 1 5 0 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 http://www.xiaoyu163.com...
  • Page 18: Parts List

    KS-AX4700 3 7 63 1515 0 PARTS LIST KS-AX4700 * All printed circuit boards and its assemblies are not available as service parts. Areas suffix E ------------ Continental Europe J -------------- Northern America L 13942296513 - Contents - Exploded view of enclosure assembly and parts list...
  • Page 19: Exploded View Of Enclosure Assembly And Parts List

    KS-AX4700 3 7 63 1515 0 Exploded view of enclosure assembly and parts list Block No. 19 19 L 13942296513 19 19 u163 http://www.xiaoyu163.com...
  • Page 20 KS-AX4700 3 7 63 1515 0 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-6413-1 FRONT PANEL REAR PANEL MA-RP-IT-6414-1 MA-BC-IT-6415-2 BOTTOM COVER MA-SD-06-1925-0 CONTROL PANEL...
  • Page 21: Electrical Parts List

    KS-AX4700 Electrical parts list 3 7 63 1515 0 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 142 CER104PF50V CAPACITOR...
  • Page 22 KS-AX4700 3 7 63 1515 0 Electrical parts list (P.C.board) Block No. 01 Item Remarks Item Remarks Parts number Parts name Area Parts number Parts name Area P 01 TM0006-00 TERMINAL R 20 CAR1/5WJ10K RESISTOR CARBON FILM 1/5 P 02...
  • Page 23 KS-AX4700 3 7 63 1515 0 Electrical parts list (P.C.board) Block No. 01 Item Parts number Parts name Remarks Area Item Remarks Parts number Parts name Area R 137 CAR1/5WJ1K RESISTOR CARBON FILM 1/5 R 249 CAR1/5WJ220 RESISTOR CARBON FILM 1/5...
  • Page 24: Packing And Accessories

    KS-AX4700 3 7 63 1515 0 Packing and accessories Block No. Block No. L 13942296513 A1,A2,A6,A7 u163 http://www.xiaoyu163.com...
  • Page 25 KS-AX4700 3 7 63 1515 0 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 POLY BAG-B MA-PB-01-1715-0 MA-PB-01-4101-0 POLY BAG-C MO-FI-01-8087-0 PAPER SPACER FLAT PAD...