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Kenwood KRK-14H Service Manual
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Kenwood KRK-14H Service Manual

Control head interface kit, control head remote kit
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CONTROL HEAD INTERFACE KIT, CONTROL HEAD REMOTE KIT
B5B-7173-00
SERVICE MANUAL
12
2014
RA021<Rev.001>
COPYRIGHT © 2014 JVC KENWOOD Corporation
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
This product complies with the RoHS directive for the European market.
B5B-7173-00
SERVICE MANUAL
KRK-14H, KRK-15B
KRK-14H
Note :
Lead free solder used in the board (material : Sn, Ag, In, Bi, melting point : 227 Centigrade)
COPYRIGHT © 2014 JVC KENWOOD Corporation

TABLE OF CONTENTS

KRK-15B
This product uses Lead Free solder.
No.RA021<Rev.001>
2014/12

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Summary of Contents for Kenwood KRK-14H

  • Page 1: Table Of Contents

    B5B-7173-00 KRK-14H, KRK-15B KRK-14H KRK-15B COPYRIGHT © 2014 JVC KENWOOD Corporation Note : Lead free solder used in the board (material : Sn, Ag, In, Bi, melting point : 227 Centigrade) TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 Neither is any liability assumed for damages resulting from the use of the information contained herein. JVC KENWOOD Corporation reserves the right to make changes to any products herein at any time for improvement purposes. 1-2 (No.RA021<Rev.001>)

  • Page 3: Precaution

    2.1.1 Installing the Remote Kit (KRK-14H, KRK-15B) (1) Lift the two tabs of the panel on the bottom of the transceiv- The KRK-14H and KRK-15B remote kit is used to remotely oper- er with a flat-head screwdriver and remove the panel from ate the NX-5700/5800 series transceiver.
  • Page 4 After inserting, the flat cable should be locked with the connector (flap) surely. (3) Fit the four tabs of the KRK-14H into the operation panel. Note: Fit so that the flat cable towards the way of the arrow us- ing a finger.
  • Page 5 KRK-14H is an optional unit designed to separate the Mobile transceiver and Basic type panel (KCH-19) by remote control cable (KCT- 71). KRK-14H communicates with Mobile transceiver in a serial bus and controls Basic type panel. This unit consists of a power supply circuit, audio circuit, and control circuit.
  • Page 6 RX Audio KRK-14H has two RX Audio input channels, AFIA+/- and AFIB+/-. And the MPU selects the one of the two channels, and input it to codec IC (IC17). (The channel to use is notified by serial communication from RF Deck.) The codec IC adjusts RX Audio signal amplitude equal to the value of selected volume step, and output it.
  • Page 7 RX Audio path Speaker voice sounds of KCH-19 which received by Mobile transceiver are passed through KRK-15B and KRK-14H. Receive audio for KRK-14H given from AFI+/- has outputted to AFOA+/- or AFOB+/- terminal through IC5, IC8, IC9 and IC10 as fol- lows.
  • Page 8 COMPONENTS DESCRIPTION 2.3.2 Interface unit (XC3-0090-20) (KRK-15B) 2.3.1 Interface unit (XC3-0080-20) (KRK-14H) Ref.No Part Name Description Ref.No Part Name Description AF AMP DC/DC converter (53DC) CAN transceiver IC DC/DC converter (39DC) Voltage regulator (33A) Voltage regulator (33A) IC4, 5 Analog SW (AF)
  • Page 9 Pin No. Name Function Pin No. Name Function CN35 O Serial data output O Speaker output plus /PTT I PTT input O Speaker output minus /PSW I Detection signal input of power switch - Ground AFO+ O AF signal output plus O Switched power supply AFO- O AF signal output minus...
  • Page 10 Pin No. Name Function Pin No. Name Function - No connection - No connection /PRST O Reset signal - No connection /PSW I Detection signal input of power switch - No connection MICA+ I MIC signal input plus_A - No connection MICA- I MIC signal input minus_A - No connection...

  • Page 11: Disassembly

    SECTION 3 DISASSEMBLY Precautions for Disassembly 3.1.1 Remove the top cover from the shield cover (KRK-14H only) (1) There are three shield covers on the interface unit, the top covers can be removed. Shield cover (2) Use tweezers to slightly lift the edge of the top cover. <1>...

  • Page 12: Troubleshooting

    SECTION 5 TROUBLESHOOTING KRK-14H Fault Diagnosis of the BGA (Ball Grid Array) IC Overview A flowchart for determining whether or not the transceiver can be powered on (the LCD does not function even if the power switch is turned on) due to broken BGA parts. As necessary, connect the NX-5700/5800 and KCH-19 directly. Confirm whether there is a defect in the KRK-14H and KRK-15B.
  • Page 13 When a normal Checking the output signal value is confirmed. from the MPU. If the /FRST is always 0V ,the MPU is broken. Checking the control signal output from the MPU. When an abnormal Remove D13 to check the voltage of Flash value is confirmed.
  • Page 14 When the transceiver starts to receive data, the [LOADING] display on the LCD. The Firmware is written to DECK (NX-5700/5800) and KRK-14H at the same time. f) If writing ends successfully, the checksum is calculated and a result is displayed.
  • Page 15 PRINTED CIRCUIT BOARD INTERFACE UNIT (XC3-0080-20 (KRK-14H_M)) --- Component side view (J7C-0039-00) --- R103 C107 C119 C110 CN41 CN40 C101 C100 R192 IC10 R191 IC12 C109 C103 CN38 CN39 C106 CN47 CN10 CN14 CN12 CN13 CN11 R190 R189 IC11 C111 C113 C112 C217...
  • Page 16 A-1C ADDRESS TABLE OF BOARD PARTS Y axis Side Each address may have an address error by one X axis interval. REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION A- 3A R142 B- 2A A- 4B C146 B- 2A A- 4A...
  • Page 17 INTERFACE UNIT (XC3-0090-20 (KRK-15B_M)) --- Component side view (J7C-0040-00) --- J7C-0040-00 ADDRESS TABLE OF BOARD PARTS Each address may have an address error by one interval. A-1C Y axis Side X axis R102 R104 REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION B- 3A B- 1A C105...
  • Page 18 SCHEMATIC DIAGRAM INTERFACE UNIT (XC3-0080-20 (KRK-14H_M)) INTERFACE UNIT (XC3-008) UMODE /FRST 2.2k 2.2k REVERSE 2.2k CURRENT LB73G0AM-004 2.2k PREVENTION 2.2k 2.2k 2.2k F1B-0026-00 OMAP SHIELD CASE CN34 RB521CM-30 ADD[0] DAT[0] ADD[1] DAT[1] DDR_D[0] ADD[2] DAT[2] DDR_A[0] DQ0 A8 DDR_D[1] ADD[3] DAT[3] DDR_A[1] DQ1 B7...
  • Page 19 INTERFACE UNIT (XC3-0090-20 (KRK-15B_M)) INTERFACE UNIT (XC3-009) 100p 1.66V ANALOG SWITCH(AF) Vref /MIC_EN AF AMPLIFIER TC74VHC4052AK MICSW2 DC AMPLIFIER(VREF) 470p GND2 8 MICSW1 Vref GND1 7 AFoB-_0 Vref INH 6 69mVrms OPA170AIDRLR MICA-_0 C107 AFoA-_0 1Y 5 0.1u ANALOG SWITCH(AF) 0.1u 0.1u MIC-...
  • Page 20 INTERCONNECTION DIAGRAM IC302 IC911 AF AMP POWER MODULE LA4425A INTERFACE UNIT CN731 20pin Option KRK-15B KRK-14H R402 CN35 CN900 CN907 CN906 INT SP AUXIO6 AUXIO6 AUXIO7 AUXIO7 AUXIO1 AUXIO1 CN749 CN37 AUXIO2 AUXIO2 J901 NC(IGN) RXD2 RXD2 R_SET0 R_SET0 AUXIO3...
  • Page 21 BLOCK DIAGRAM KRK-14H KRK-15B Interface Unit (XC3-008) Interface Unit (XC3-009) CN37 MM3404A50URE TPS54240DGQ 5.3V 5.0V 53DC DC/DC IC29 VOLTAG E REGULATO R CONVERTER 18D_Flash /CS4 /RD /WR ADD[0]~ADD[23] TJA1051TK/3 ADD[23] DAT[0]~DAT[15 ] FLASH W02-3785-05 TPS54240DGQ DAT[0]~DAT[15 ] /FRST /CS2(/CS2_2) CAN+...
  • Page 22 MEMO...
  • Page 23 PARTS LIST [KRK-14H,KRK-15B] * SAFETY PRECAUTION Parts identified by the symbol are critical for safety. Replace only with specified part numbers. * BEWARE OF BOGUS PARTS Parts that do not meet specifications may cause trouble in regard to safety and performance.
  • Page 24 Exploded view of general assembly and parts list (KRK-14H) Block No.M1MM INTERFACE UNIT<01> General assembly Block No. [M][1][M][M]  Symbol No. Part No. Part Name Description Local A2D-0001-00 REAR PANEL F0G-0002-00 MOLDING COVER F10-3225-05 SHIELDING COVER(DC/DC) (x2) F1B-0027-00 SHIELDING COVER(OMAP)
  • Page 25 Exploded view of general assembly and parts list (KRK-15B) Block No.M2MM INTERFACE UNIT<02> General assembly Block No. [M][2][M][M]  Symbol No. Part No. Part Name Description Local A6C-0001-00 MAIN PANEL F0G-0002-00 MOLDING COVER N80-2608-48 P.HEAD T.SCREW (x4) (No.RA021<Rev.001>)3-3...
  • Page 26 Electrical parts list INTERFACE UNIT  Symbol No. Part No. Part Name Description Local XC3-0080-20(KRK-14H_M) CK73HB1H272K C CAPACITOR 270UF K *Note : This part cannot be replaced. There- CK73HB1H103K C CAPACITOR 0.010UF K CC73HCH1H390G C CAPACITOR 39PF G fore, this part is not supplied as a service part. CK73HB1E104K C CAPACITOR 0.10UF K...
  • Page 27  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C112 CC73HCH1H100D C CAPACITOR 10PF D C250 CK73HB1E104K C CAPACITOR 0.10UF K C113 CC73HCH1H100D C CAPACITOR 10PF D C251 CK73HBB1H102K C CAPACITOR 1000PF K C114 CK73HB1H103K...
  • Page 28  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local RK73HH1J473D MG RESISTOR 47K D 1/16W R194 RK73HH1J473D MG RESISTOR 47K D 1/16W RK73HH1J473D MG RESISTOR 47K D 1/16W R195 RK73HB1J000J MG RESISTOR 0.0 J 1/16W RK73HH1J473D MG RESISTOR...
  • Page 29 INTERFACE UNIT  Symbol No. Part No. Part Name Description Local XC3-0090-20(KRK-15B_M) RK73HB1J104J MG RESISTOR 100K J 1/16W Block No. [0][2] RK73HB1J104J MG RESISTOR 100K J 1/16W RK73FB2B121J MG RESISTOR 120 J 1/8W  Symbol No. Part No. Part Name Description Local RK73HB1J000J...
  • Page 30 Packing materials and accessories parts list (KRK-14H) Block No.M3MM Packing and accessories Block No. [M][3][M][M]  Symbol No. Part No. Part Name Description Local ------------ PAMPHLET(ROHS) ------------ PAMPHLET E3F-0019-00 FLAT CABLE(50PIN TO HEAD) E3H-0008-00 LEAD WIRE WITH CONNECTOR(4PIN TO HEAD)
  • Page 31 Packing materials and accessories parts list (KRK-15B) Block No.M4MM Packing and accessories Block No. [M][4][M][M]  Symbol No. Part No. Part Name Description Local ------------ PAMPHLET(ROHS) ------------ PAMPHLET H1C-0004-00 PACKING FIXTURE ------------ PROTECTION BAG(MOLDING COVER) ------------ PROTECTION BAG (100/250/0.07) H5A-0245-00 ITEM CARTON (No.RA021<Rev.001>)3-9...
  • Page 32 JVC KENWOOD Corporation Communications Systems BU (No.RA021<Rev.001>) Printed in Japan...

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Krk-15b