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JVC KT-DB1000 Service Manual
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JVC KT-DB1000 Service Manual

Dab tuner unit
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SERVICE MANUAL
09
2002
49758
Safety precaution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
DAB Tuner Unit
KT-DB1000
TABLE OF CONTENTS
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
KT-DB1000
No.49758
2002/09

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Summary of Contents for JVC KT-DB1000

  • Page 1 KT-DB1000 SERVICE MANUAL DAB Tuner Unit 49758 2002 KT-DB1000 TABLE OF CONTENTS Safety precaution ............... 2 Disassembly method .
  • Page 2 KT-DB1000 SECTION 1 Safety precaution 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 KT-DB1000 SECTION 2 Disassembly method 2.1 Main body 2.1.1 How to remove a top cover (See Figure 1 and 2.) (1) Screw A attaches a top cover to the main body. Remove the two screws A from the both sides of the main body.
  • Page 4 KT-DB1000 SECTION 3 Description of major ICs 3.1 MN102H60KCB (IC701) : Controller • Pin layout • Pin functions Symbol Function Not use LCDRS Resistor select output terminal for LCD module LCDR/W Read/Write select output terminal for LCD module LCDE Data read/write start up output for LCD module...
  • Page 5 KT-DB1000 Symbol Function DABDATX FIC packet data stream outout data output terminal MPUEN DAB MPU interface chip enable output terminal MPUMOD DAB MPU interface mode signal outpout terminal DZFINL DZFL input terminal from DAC, "H" outout AMUTEL DZFINR DZFL input terminal from DAC, "H" outout AMUTER...
  • Page 6 KT-DB1000 3.2 AK4382AVT-X (IC501) : D/A converter • Pin layout • Block diagram • Pin function Pin No. Symbol Function MCLK Master Clock Input Pin BICK Audio Serial Data Clock Pin SDTI Audio Serial Data Input Pin LRCK L/R Clock Pin...
  • Page 7 KT-DB1000 3.3 MN66720UC (IC1) : DAB baseband signal processer • Pin layout • Block diagram...
  • Page 8 KT-DB1000 • Pin functions Pin No. Symbol Function TESTIN0,TESTIN1 Input terminal for test. AVDD Analogue VDD terminal. Reference voltage terminal for AD concerter top side. ADVRT ADIN Analogue IF signal input terminal. ADVRB Reference voltage terminal for AD converter bottom side.
  • Page 9 KT-DB1000 Pin No. Symbol Function DDOWMSC Direct data output MSC window output terminal. LVDD1 Internal digital VDD terminal. VSS3 Digital VSS terminal. 55~60 DDOMNO0~DDOMNO5 DIrect data output MSC sub channel ID output terminal. DDOWFIC Direct data output FIC window output terminal.
  • Page 10 KT-DB1000 3.4 BR93LC66F-X (IC702) : EEPROM • Terminal layout • Pin Functions Symbol Function Power supply Connect to GND Chip select input Serial clock input Start bit, OP-code,address, serial data input Serial data output Internal state display output of READY/BUSY 3.5 S-81250SGUP-X (IC805) : Regulator...
  • Page 11 KT-DB1000 3.8 UPC7805AHF (IC803) : Regulator • Pin layout • Block diaglam 3.9 NJM2370U09-X (IC801) : Regulator • Pinlayout • Block diagram • Pin function Pin No Function Control Noise bypass Vout...
  • Page 12 KT-DB1000 3.10 BA033FP-X (IC804) : Regilator • Pin layput • Block Diagram 3.11 TC7WT241FU-X (IC771,IC772) : Buffer • Pin layotu & Blocl diagram 3.12 NJM2750M-X (IC911) : Audio selector • Pin layout & Block diagram • Pin function Pin No...
  • Page 13 KT-DB1000 3.13 PST9121N-X (IC851) : System reset • Pin layout • Block diagram 3.14 SI-8050JF-F1 (IC802) : Regulator • Pin layout • Pin function Pin No. Pin function SW out ON/OFF • Block diagram...
  • Page 14 KT-DB1000 PARTS LIST [ KT-DB1000 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix E ----------- Continental Europe - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1) 3- 4 Electrical parts list (Block No.01)
  • Page 15 KT-DB1000 Exploded view of general assembly and parts list Block No.
  • Page 16 KT-DB1000 Parts list (General assembly) Block No. M1MM Item Description Parts number Parts name Q'ty Area LV21339-002A BOTTOM CASE LV33795-002A TOP CASE QYSDST2606N SCREW QYSDST2606Z SCREW LV41152-001B SPECIAL SCREW QAM0421-001 CAR CABLE LV33864-001A NAME PLATE LV43298-001A LABEL...
  • Page 17 KT-DB1000 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area NCB31CK-104X C CAPACITOR C 809 QEKJ1CM-106Z E CAPACITOR 10MF 20% 16V QEKJ1CM-107Z E CAPACITOR 100MF 20% 16V...
  • Page 18 KT-DB1000 Electrical parts list (Main board) Electrical parts list (Main board) Block No. 01 Block No. 01 Item Remarks Item Remarks Parts number Parts name Area Parts number Parts name Area R 13 NRSA63J-221X MG RESISTOR R 774 NRSA63J-334X MG RESISTOR...
  • Page 19 KT-DB1000 Packing materials and accessories parts list Block No. Block No. A3~A5 A1,A2 Parts list (Packing) Block No. M3MM Item Parts number Parts name Q'ty Description Area QPA00801205 POLY BAG QPA01202505 POLY BAG QPJ02104040 POLY SHEET LV33904-001A CARTON Parts list (Accessories) Block No.
  • Page 20 KT-DB1000 SCHEMATIC DIAGRAMS DAB Tuner Unit KT-DB1000 CD-ROM No.SML200209 Area Suffix Continental Europe Contents Block diagrams Standard schematic diagrams Printed circuit boards No.49758SCH COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. Sep. 2002...
  • Page 21 Safety precaution 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 22 KT-DB1000 Block diagram ANTENNA 24.576MHz DAB TUNER DAB TUNER (A5V/A3.3V) (A5V/A3.3V) QAU0284-001 QAU0284-001 DAB BASEBAND DAB BASEBAND (D3.3V/A3.3V) (D3.3V/A3.3V) MN66720UC MN66720UC 2.048MHz CD CHANGER 3M DRAM 3M DRAM L-CH 36.864MHz R-CH DEINTE- DEINTE- IC911 IC911 RLEAVER RLEAVER Q121 Q121 IC501...
  • Page 23 KT-DB1000 KT-DB1000 Standard schematic diagram MN66720UC 22/10 100/16 R704 22/10 C702 R703 R719 R718 4.7/25 C701 C709 C703 R720 22/10 R721 R702 R701 100/16 QAU0284-001 22/10 C704 R726 QSW0991-001 C710 UDZS3.6B 10/16 R729 4.7k R730 4.7k R731 IC701 MN102H60KCB C706...
  • Page 24 KT-DB1000 <Wave form> IC1 Pin34 IC1 Pin35 IC1 Pin36 IC701 Pin13 IC701 Pin50 IC802 Pin2...
  • Page 25 KT-DB1000 Printed circuit boards Main board (Forward side) Jack board (Forward side) C811 C817 C810 IC806 C818 X701 IC702 J911 10362- R773 C816 C812 IC851 IC804 IC701 C703 IC771 C851 IC772 R705 Q804 C803 R706 C802 C801 IC801 C813 R707...