Download  Print this page

JVC RC-BX30 Service Manual

Cd portable system
Hide thumbs

Advertisement

SERVICE MANUAL
CD PORTABLE SYSTEM
Contents
Safety precautions
Preventing static electricity
Important for laser products
Disassembly method
Adjustment method
Trouble shooting
1-2
1-3
1-4
1-5
1-14
1-17
COPYRIGHT
2002 VICTOR COMPANY OF JAPAN, LTD.
until TOC read
Wiring connection
Area suffix
UJ --------------------- U.S.Military
1-18
1-19
1-19
1-20
1-22
No.21171
Dec. 2002

Advertisement

Table of Contents
loading

  Also See for JVC RC-BX30

  Related Manuals for JVC RC-BX30

  Summary of Contents for JVC RC-BX30

  • Page 1: Table Of Contents

    RC-BX30 SERVICE MANUAL CD PORTABLE SYSTEM RC-BX30 Area suffix UJ --------------------- U.S.Military Contents Safety precautions Flow of functional operation Preventing static electricity until TOC read 1-18 Important for laser products Maintenance of laser pickup 1-19 Disassembly method Replacement of laser pickup...
  • Page 2: Rc-Bx30

    RC-BX30 1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.
  • Page 3 RC-BX30 Preventing static electricity 1. Grounding to prevent damage by static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
  • Page 4 RC-BX30 Important for laser products 5.CAUTION : If safety switches malfunction, the laser is able 1.CLASS 1 LASER PRODUCT to function. 2.DANGER : Invisible laser radiation when open and inter 6.CAUTION : Use of controls, adjustments or performance of lock failed or defeated. Avoid direct exposure to beam.
  • Page 5 RC-BX30 Disassembly method CD door Handle <Main body section> Claw a Claw a Removing the handle (See Fig. 1.) Open the CD door. Lift the handle slightly. While pressing the claws a of the rear cabinet assembly in the direction of the arrow 1, slide the handle in the direction of the arrow 2.
  • Page 6 RC-BX30 <Front cabinet assembly section> Prior to performing the following procedures, remove the front cabinet assembly from the rear cabinet assembly. Right speaker Left speaker assembly Removing the right and left speaker assembly assemblies (See Fig. 5.) From the inside of the front cabinet assembly, remove the six screws B retaining the right and left speaker assemblies.
  • Page 7 RC-BX30 FM antenna Rear cabinet assembly <Rear cabinet assembly section> Prior to performing the following procedures, remove the front cabinet assembly from the rear cabinet assembly. Removing the tuner board (See Figs. 8 to 10.) From the rear side of the rear cabinet assembly, remove the screw D retaining the FM antenna.
  • Page 8 RC-BX30 Removing the cassette deck/CD Cassette deck/CD mechanism assembly mechanism assembly (See Figs.12 and 13.) From the rear side of the rear cabinet assembly, remove the two screws J retaining the cassette deck/CD mechanism assembly. (See Fig.12.) Disconnect the wires from the connectors CN302, CN303 and CN501 on the main board.
  • Page 9 RC-BX30 Removing the cassette board (See Fig. 16.) Soldered section n From the back side of the cassette deck mechanism assembly, remove the tie band bundling the wires. Remove the solders from the soldered section m connecting the wires of the capstan motor and leaf switch.
  • Page 10 RC-BX30 Removing the power transformer Rear cabinet assembly (See Figs.18 to 20.) Prior to performing the following procedures, Voltage selector remove the main board and cassette deck/CD switch mechanism assembly. From the rear side of the rear cabinet assembly, remove the battery door. (See Fig.18.) Remove the two screws P retaining the voltage selector switch.
  • Page 11 RC-BX30 Removing the CD mechanism Cassette deck BC03 CD mechanism mechanism assembly assembly (See Fig. 21.) assembly Rubber (orange) Prior to performing the following procedures, Rubber (pink) remove cassette deck/CD mechanism assembly. (See Figs.12 and 13.) From the bottom side of the cassette deck/CD...
  • Page 12 RC-BX30 <CD mechanism assembly section> Pickup cover Removing the CD pickup unit (See Figs. 1 to 3.) Prior to performing the following procedures, remove the CD mechanism assembly. Remove the three screws A retaining the CD pickup cover. (See Fig.1.) Remove the slit washer retaining the feed middle gear and take out the feed middle gear.
  • Page 13 RC-BX30 <Cassette deck mechanism Cassette deck mechanism assembly Capstan motor assembly section> Prior to performing the following procedures, remove the cassette deck mechanism assembly Capstan motor from the rear cabinet assembly. belt (See Fig.17 of "Rear cabinet section" on page 1-9.) Removing the capstan motor (See Figs.1 and 2.)
  • Page 14 RC-BX30 Adjustment method Measuring instructions required for Measuring instruments adjustment Radio section FM 1kHz, 22.5kHz deviation 1. AM signal generator FM STEREO : 1kHz, 67.5kHz deviation 2. FM signal generator pilot signal 7.5kHz 3. Inter mediate frequency sweep generator AM : 1kHz, 30% modulation 4.
  • Page 15: Tuner Section

    RC-BX30 Cassette amplifier section Item Measuring condition Check and adjustment procedure Standard value Adjusting part Head azimuth Test tape: Play back the test tape VT702 (8kHz). Output level: Head azimuth adjustment VT702 (8kHz) Adjust the head azimuth adjusting screw so that the...
  • Page 16 RC-BX30 Tuner section Item Measuring condition Check and adjustment procedure Standard value Adjusting part FM tracking Signal input: Set the dial at low end, set the FM signal generator at L107 adjustment Dummy antenna (87.35MHz+0.2MHz-0.2MHz). Adjust the L107, check to see the output is maximum.
  • Page 17 RC-BX30 Trouble shooting Circuit Symptom Cause Remedy General No sound Speakers are not connected. Check the speaker connection Wrong function is selected. Set switch to the proper position. Defective volume control Set the volume control to a proper sound level.
  • Page 18: Flow Of Functional Operation

    RC-BX30 Flow of functional operation until TOC read Slider turns REST Power ON SW ON. Laser ON Focus start Turn on focus servo Disc spinning Radial_error scaling PLL Lock Turn on radial servo Read TOC 1-18...
  • Page 19: Maintenance Of Laser Pickup

    RC-BX30 Maintenance of laser pickup Replacement of laser pickup (1) Cleaning the pick up lens Before you replace the pick up, please try to Turn off the power switch and,disconnect the clean the lens with a alcohol soaked cotton power cord from the AC OUTLET.
  • Page 20: Description Of Major Ics

    RC-BX30 Description of major ICs AN7312 (IC201) : Dual recording/Playback pre-amplifier circuit with ALC 1. Terminal layout 2. Block diagram Amp. Ripple Filter Amp. 3. Pin function Pin No. Symbol Function ALC time constant ALC time constant by resistance and capacitor ALC input Ch.1...
  • Page 21 RC-BX30 TA8227P (IC401) : Amplifier 1. Terminal layout 2. Block diagram SDBY SDBY ROUT LOUT CH-1 ROUT SGND Bias Circuit Thermal Shut Down S-GND Protection Circuit CH-2 LOUT pre-GND MC14094 (IC601) : XXXXX 1. Terminal layout 1-21...
  • Page 22 CD MODULE (CD servo board) BATT- DECK HEAD (REC/PB head) Cassette board Display board (Forward side) (Forward side) Color codes are shown below. BROWN BLUE OW20-41032-06K VIOLET Micro switch board ORANGE GREY (Forward side) YELLOW WHITE GREEN BLACK RC-BX30 UJ VERSION...
  • Page 23 RC-BX30 < M E M O > 1-23...
  • Page 24: Rc-Bx30

    RC-BX30 VICTOR COMPANY OF JAPAN, LIMITED AUDIO & COMMUNICATION BUSINESS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,maebashi-city,371-8543,Japan No.21171 200212...