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JVC UX-G28B Service Manual

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SERVICE MANUAL
MICRO COMPONENT SYSTEM
9 S ERVICE MANUAL
MB634
2007
UX-G28B, UX-G28E, UX-G28EN,
COPYRIGHT © 2007 Victor Company of Japan, Limited
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
1
Precaution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
Specific Service Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
5
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
UX-G28EV
SERVICE POLICY
No service part is available for this model.
Exchange only.
SP-UXG28

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COPYRIGHT © 2007 Victor Company of Japan, Limited
CA-UXG28
SP-UXG28
EV only
No.MB634
2007/9

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  • Page 1 SERVICE MANUAL MICRO COMPONENT SYSTEM MB634 2007 9 S ERVICE MANUAL UX-G28B, UX-G28E, UX-G28EN, UX-G28EV SERVICE POLICY No service part is available for this model. Exchange only. SP-UXG28 CA-UXG28 SP-UXG28 EV only COPYRIGHT © 2007 Victor Company of Japan, Limited...
  • Page 2 SPECIFICATION 8 W per channel min. RMS driven into 4 Ω at 1 kHz with no more than 10% total harmonic Amplifier section Output Power distortion. (IEC268-3) 4 Ω - 8 Ω Speakers/Impedance Terminals AUX IN Input sensitivity/Impedance (250mV/50kΩ):USB Ver.2.0 (Full Speed) Compatible device Mass Storage Class Compatible File System FAT16, FAT32...

  • Page 3: Precaution

    SECTION 1 PRECAUTION Safety Precautions (1) This design of this product contains special hardware and voltmeter. many circuits and components specially for safety purpos- Move the resistor connection to each exposed metal es. For continued protection, no changes should be made part, particularly any exposed metal part having a return to the original design unless authorized in writing by the path to the chassis, and measure the AC voltage across...
  • Page 4 1.5 Safety Precautions (U.K only) (1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con- tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace- ment parts must be identical to those used in the original circuits.
  • Page 5 Important for laser products 1.CLASS 1 LASER PRODUCT 5.CAUTION : If safety switches malfunction, the laser is able to function. 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiation 6.CAUTION : Use of controls, adjustments or performance of when open.

  • Page 6: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.MB634)

  • Page 7: Remove The Two Screws A Attaching The Both Side Of Rear Cover. (See Fig

    SECTION 3 DISASSEMBLY Main body 3.1.1 Removing the REAR COVER (See Fig.1 to 4) (1) Remove the two screws A attaching the both side of REAR COVER. (See Fig.1) (2) Remove the two screws B attaching the REAR COVER. (See Fig.2) (3) Remove the two screws C, two screws D and two screws E attaching the REAR COVER.
  • Page 8 3.1.2 Removing the POWER BOARD assembly (See Fig.5) (1) Disconnect the connector wire from POWER TRANS- FORMER connected to connector CN1101 CN1103 the POWER BOARD assembly. (2) Disconnect the POWER CORD connected to connector CN1104 of the POWER BOARD assembly. (3) Remove the three screws F attaching the POWER BOARD assembly.
  • Page 9 3.1.4 Removing the MAIN BOARD assembly (See Fig.8 to 11) (1) Disconnect the card wire from MAIN BOARD assembly connected to connector CN710 of the CD BOARD assem- CN702 bly. (See Fig.8) (2) Disconnect the connector wire from DOOR SWITCH con- nected to connector CN404 of the MAIN BOARD assem-...
  • Page 10 3.1.5 Removing the USB BOARD assembly (See Fig.12, 13) (1) Disconnect the connector wire from USB BOARD assem- bly connected to connector CN703 of the CD BOARD as- sembly. (See Fig.12) (2) Remove the two screws J attaching the USB BOARD as- sembly.
  • Page 11 3.1.6 Removing the CD MECHANISM assembly (See Fig.14) (1) Remove the four screws K attaching the CD MECHANISM assembly. Fig.14 3.1.7 Removing the CD DOOR assembly (See Fig.15) (1) Remove the two screws L attaching the CD DOOR assem- bly. Fig.15 (No.MB634)1-11...

  • Page 12: Adjustment

    3.1.8 Removing the FRONT BOARD assembly (See Fig.16) (1) Remove the VOLUME KNOB. (2) Remove the eight screws M attaching the FRONT BOARD assembly. Fig.16 SECTION 4 ADJUSTMENT This service manual does not describe ADJUSTMENT. 1-12 (No.MB634)

  • Page 13: No.mb634)1

    SECTION 5 TROUBLESHOOTING BLOCK DIAGRAM FM ANT. AM ANT. IC701 74HC4094 IC712 IC711 IC707 KS161622 FM/AM/RDS TUNER BOARD SST39FV800A TU+9V SDRAM ATMEGA8 FLASH MEMORY LCD DRIVER IC705 HT1622 AUX IN R-OUT IC710 L-OUT TS2501 R.SPK OUTPUT 3.3V 3.3V 1.8V IC501 SC7314 IC714 IC716...
  • Page 14 < M E M O > (No.MB634)1-14...
  • Page 15 5.2 STANDARD SCHEMATIC DIAGRAMS 5.2.1 Main section CN504 CN403 TO CN704 (CONTROL PWB) TO TUNER MODULE X702 32.768K DGND R705 RDS-CLK R405 22 DGND IR/IN L707 AVCC ADC6 10uH IC707 AREF R735 Atmega8 ADC7 JOG1 R738 DGND HC4094-CLK IC701 HC4094-DATA R737 74HC4094 RDS-DATA...
  • Page 16 5.2.2 Front section DGND L604 SEBG160808U300MT L602 SEBG160808U300MT SEBG160808U300MT L603 SEBG160808U300MT L605 USB+5V JK601 DGND DGND L-OUT AGND 47uH R-OUT L607 R611 RE701 VR701 R795 R794 R612 SS338AL AGND L608 47uH Q703 LED703 L606 JK602 8550 R796 47uH STAND BY TIMER-LED JOG2 LED702...
  • Page 17 5.2.3 CD section (1/2) TO: 4 OF 4 XD[0:100] R930 CD-BCK XD11 2.2R R928 CD-LRCK XD10 2.2R CD-PCMD XD12 USB5V R941 MOTOR 100K MOTOR Sled Spindle Y900 16.9344MHz XA10 OUT5B IN5B OUT5A GND1 OUT3A OUT2A CD_VCC OUT3B OUT2B IN3A IN2A LDCTL IN5A VCC2...
  • Page 18 5.2.4 CD section (2/2) VDD3.3D L720 10UK XD30 DGND DGND L_OUT R752 AGND R753 R_OUT XD60 GPIO_A0/SDO_0 XD10 CD_VCC GPIO_A1/SCK_0/CBCLK XD11 +2.7V GPIO_A2/FRM_0/CLRCK Q723 +1.8V +1.8V +3.3V XD12 GPIO_A3/SDI__0/CDAI B772 AGND XA10 XD10 DQ10 XA11 XD11 DQ11 XD27 XA12 XD12 DQ12 GPIO_A4/SDO_1 XA13...
  • Page 19 < M E M O >...
  • Page 20 Victor company of Japan, Limited Audio/Video Systems category 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MB634) Printed in Japan...

This manual is also suitable for:

Ux-g28enUx-g28eUx-g28ev

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