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JVC RC-BM5 Service Manual

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SERVICE MANUAL
CD PORTABLE SYSTEM
Contents
Safety precautions
on the safety
RC-BM5
1-2
1-3
1-4
1-5
1-6
1-16
COPYRIGHT
2002 VICTOR COMPANY OF JAPAN, LTD.
Flow of functional operation
until TOC read
RC-BM5
Area suffix
J ----------------------------- U.S.A.
C -------------------------- Canada
1-19
1-20
1-21
1-21
1-22
1-37
No.21129
Oct. 2002

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  Summary of Contents for JVC RC-BM5

  • Page 1: Table Of Contents

    RC-BM5 SERVICE MANUAL CD PORTABLE SYSTEM RC-BM5 Area suffix J ----------------------------- U.S.A. C -------------------------- Canada Contents Safety precautions Trouble shooting 1-19 Preventing static electricity Flow of functional operation Important for laser products until TOC read 1-20 Importance administering point Maintenance of laser pickup...
  • Page 2 RC-BM5 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: Preventing Static Electricity

    RC-BM5 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: Important For Laser Products

    RC-BM5 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: Importance Administering Point

    RC-BM5 Importance administering point on the safety CN206 F201 Power amplifier board Caution: For continued protection against risk of fire, replace only with same type: 2.5A/250V for F201. This symbol specifies type of fast operating fuse. Precaution: Pour eviter les risques de feu, remplacez le fusible de surete par le meme type: 2,5A/250V pour F201.
  • Page 6: Disassembly Method

    RC-BM5 Disassembly method <Main body section> Handle Claw a Claw a Removing the handle (See Fig. 1.) 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 7: Rc-Bm5

    RC-BM5 <Front cabinet section> Prior to performing the following procedures, remove the front cabinet assembly from the rear Display board cabinet assembly. Removing the display board (See Fig. 6.) From the inside of the front cabinet assembly, remove the eight screws C retaining the display board and then take out the display board.
  • Page 8: Rc-Bm5

    RC-BM5 Removing the cassette door (See Fig. 9.) Cassette door bracket Open the cassette. While pressing the claws f on the left and right of the cassette door bracket, slide the cassette door. Cassette door Disengage the hooks g and h on the left and right...
  • Page 9: Rc-Bm5

    RC-BM5 <Rear cabinet section> Prior to performing the following procedures, Volume switch board remove the front cabinet assembly from the rear H402 Control bracket cabinet assembly. Removing the volume switch board (See Fig. 12 and 13.) Disconnect the wire from the connector H402 on the volume switch board.
  • Page 10: Rc-Bm5

    RC-BM5 Removing the tuner board Notch w (See Figs. 16 and 17.) Remove the wire from the connector H801 on the Notch x tuner board. Remove the two screws P and board holders (B) retaining the tuner board. Tuner board Pull out the tuner board from the notches w and x of the rear cabinet assembly.
  • Page 11: Rc-Bm5

    RC-BM5 Removing the CD/Cassette mechanism Rear cabinet assembly assembly (See Figs. 12,14,16 and 20 to 22.) [Reference] It is not necessary to remove the cassette deck mechanism assembly from the rear cabinet assembly. From the back side of the rear cabinet assembly,...
  • Page 12: Rc-Bm5

    RC-BM5 <CD/Cassette mechanism section> Main board Removing the main board (See Figs. 23 to 25.) [Caution] When removing the main board, be careful not to scratch or damage the CD door. From the bottom side of the CD/Cassette mechanism assembly, remove the screw U retaining the main board.
  • Page 13: Rc-Bm5

    RC-BM5 Removing the CD mechanism Cassette mechanism assembly assembly (See Fig. 26.) Rubber (Pink) Prior to performing the following procedures, Rubber (Orange) remove the main board from the CD/Cassette mechanism assembly. From the bottom side of the CD/Cassette mechanism assembly, remove the four screws W retaining the CD mechanism assembly.
  • Page 14: Rc-Bm5

    RC-BM5 <CD mechanism section> CD pickup cover Removing the CD pickup unit (See Figs. 1 to 2.) Prior to performing the following procedures, remove the CD mechanism assembly. Remove the three screws A retaining the CD pickup cover. Remove the slit washer retaining the feed middle gear and take out the feed middle gear.
  • Page 15: Adjustment Method

    RC-BM5 <Cassette mechanism section> Cassette mechanism assembly Capstan motor Prior to performing the following procedures, remove the cassette mechanism assembly from the rear cabinet assembly. (See Fig.17 and 18 of "Rear cabinet section" on Capstan motor page 1-10.) belt Removing the capstan motor (See Figs.1 and 2.)
  • Page 16: Adjustment Method

    RC-BM5 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 17: Rc-Bm5

    RC-BM5 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 18: Rc-Bm5

    RC-BM5 Item Measuring condition Check and adjustment procedure Standard value Adjusting part AM tracking Signal input: Set the AM signal generator at 600kHz and the unit L105 adjustment AM ANT. COIL receiving 600kHz, adjust L105(AM ANT. COIL) for antenna maximum output.
  • Page 19: Trouble Shooting

    RC-BM5 Trouble shooting Circuit Symptom Cause Remedy General No sound The unit is on STANDBY mode. Press STANDBY/ON button to turn on the unit. Defective volume control Set the volume control to a proper sound level. The unit is on MUTE mode.
  • Page 20 RC-BM5 Flow of functional operation until TOC read Confirm that the voltage at the pin5 of CN502 is Slider turns REST Power ON "H"/"L"/"H" SW ON. Check that the voltage at the pin64(LD) of Laser ON IC501 is +3.3V. Focus start...
  • Page 21: Maintenance Of Laser Pickup

    RC-BM5 Replacement of laser pickup Maintenance 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 22: Description Of Major Ics

    RC-BM5 Description of major ICs SAA7324 (IC501) : Digital servo processor & compact disc decoder 1. Terminal layout HFREF SBSY HFIN SFSY ISLICE V SSA1 V DDA1 TEST3 I ref STATUS V RIN SILD SAA7324H RESET SCLI V SSA2 WCLI...
  • Page 23 RC-BM5 3. Pin function Pin No. Symbol Function HFREF Comparator common mode input HFIN Comparator signal input ISLICE Current feedback output from data slicer Analog ground 1 SSA1 Analog supply voltage 1 DDA1 Iref Reference current output Reference voltage for servo ADCs...
  • Page 24 RC-BM5 Pin No. Symbol Function Digital ground 2 SSD2 DOBM Bi-phase mark output (externally buffered;3-state) Digital supply voltage 1 for periphery DDD1(P) CFLG Correction flag output (open-drain) Radial actuator output Focus actuator output Sledge control output Digital supply voltage 2 for core...
  • Page 25 RC-BM5 MX10FLCDPC (IC301) : MCU 1.Terminal layout 2. Block diagram P0.0-P0.7 P2.0-P2.7 PORT 0 PORT2 DRIVERS DRIVERS PORT 0 PORT 2 LATCH LATCH PROGRAM ADDR. REGISTER STACK WATCHDOG POINTER BUFFER TIMER REGISTER TMP2 TMP1 INCREMENTER T0/T1/T2 SFRs PROGRAM TIMERS COUNTER...
  • Page 26 RC-BM5 PT2314 (IC801) : 4ch input audio processor 1. Terminal layout 2. Block diagram Speaker LIN1 LIN1 Volume & Bass Treble OUT_L Loudness LIN2 LIN2 Mute LIN3 LIN3 LIN4 LIN4 Serial Bus Decoder & Latches DATA RIN4 RIN4 RIN3 DGND...
  • Page 27 RC-BM5 AS4C256KEO (IC701) : DRAM 1. Termianl layout 2. Block diagram DATA-IN CONTROL BUFFER CASL LOGIC CASH IO15 CLOCK DATA-OUT GENERATOR BUFFER COLUMN COLUMN DECODER ADDRESS BUFFER REFRESH CONTROLER SENSE AMPLIFIERS I/O GATING 512 X 16 REFRESH COUNTER ROW. 512 x 512 x 16...
  • Page 28 RC-BM5 LS188 (IC703) : VCD decoder 1. Terminal layout 2. Block diagram NTSC/PAL DRAM Video DRAM Interface Processor Encoder On Screen ROM/SRAM Interface Display Panel and Prog.I/O Video Interface Decoder keypad Host/CD Audio Interface Decoder Host Audio RISC Audio Processor...
  • Page 29 RC-BM5 Pin No. Symbol Function VDD_CORE_10 +2.5V 63,64 GPIO_15,GPIO_14 Programmable I/O VSS_IO_10 66 to 79 GPIO_13 to GPIO_0 Programmable I/O IR_IN IR input CD_DATA CD serial data CD_LRCK CD left/right clock CD_BCK CD bit clock CD_C2P0 CD data error flag...
  • Page 30 RC-BM5 BA5417 (IC201) : Dual power amplifier 1. Terminal layout & Block diagram 2. Pin function Pin No. Symbol Function Not connect T.S.D. OUT1 Output terminal Power supply OUT2 Output terminal ST.BY Power GND FILTER ST.BY ST.BY FILTER Filter Input terminal...
  • Page 31 RC-BM5 PT6553 (IC401) : LCD driver with key input function 1. Terminal layout 2. Block diagram COMMON SG32 TEST SEGMENT DRIVER & LATCH DRIVER SG31 SG30 SG29 SHIFT REGISTER SG28 SG27 CLOCK CONTROL TEST SG26 GENERATOR REGISTER SG25 VDD1 SG24...
  • Page 32 RC-BM5 ST24C01 (IC302) : Serial access 1K(128x8) EEPROM 1. Terminal layout 2. Pin function Pin No. Symbol I/O Function V CC Chip enable input Chip enable input Chip enable input V SS Ground Serial data adress input/output Serial clock Write control (W version)
  • Page 33 RC-BM5 TZA1024 (IC504) : Data amplifier and laser supply 1. Terminal Layout 2. Pin function Pin No. Symbol Function RGADJ Current output to laser diode V DD(L) V DD Laser supply voltage DD(L) CFIL External filter capacitor CFIL EQSEL Laser monitor diode input...
  • Page 34 RC-BM5 TEA5757(IC101): Self tuner radio (STR) 1. Terminal layout RIPPLE FM-IFI2 AM-RFI FM-FRO RFGND FMOSC WRITE-ENABLE TEA5757 AM-OSC DATA BUS-CLOCK TUNE DGND XTAL MO/ST MPXI 2. Block diagram 1-34...
  • Page 35 RC-BM5 3. Pin function Pin No. Symbol Function RIPPLE Ripple capacitor input AM-RFI AM-RF input FM-RFO Parallel tuned FM-RF circuit to ground RFGND RF ground and substrate FMOSC Parallel tuned FM-oscillator circuit to ground AMOSC Parallel tuned AM-oscillator circuit to ground...
  • Page 36 RC-BM5 W27C020 (IC702) : EEPROM 1. Terminal layout 2. Block diagram OUTPUT CONTROL BUFFER CORE DECODER ARRAY 3. Pin function Pin No. Symbol Function Program/Erase supply voltage 2 - 12 A16,A15,A12,A7 - A0 Address inputs 13 - 15 Q0 - Q2...
  • Page 37: Wiring Connection

    RC-BM5 Wiring connection Cassette board (Forward side) OW32-35160-28 OW25-61080-01 CN801 OW20-42081-09 OW31-20160-54 H202 CN205 1-37...
  • Page 38 RC-BM5 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.21129 200210...
  • Page 39 RC-BM5 SCHEMATIC DIAGRAMS CD PORTABLE SYSTEM RC-BM5 CD-ROM No.SML200210 Area suffix J ----------------------------- U.S.A. C -------------------------- Canada Contents Block diagram Standard schematic diagrams Printed circuit boards No.21129SCH COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. Oct. 2002...
  • Page 40 RC-BM5 In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " "...
  • Page 41 RC-BM5 Block diagram...
  • Page 42 RC-BM5 RC-BM5 Standard schematic diagrams Main section ( To G-3 on page 2-4 ) TO TUNER PCB H801 TO TUNER PCB H801 FROM MAIN PCB CN301 ( To G-3 on page 2-4 ) CN802 CN804 Voltage chart Q301 Q302 Q303...
  • Page 43 RC-BM5 CD control section Voltage chart Voltage chart Q501 Q502 Q503 Q701 IC701 : 4C256K To F-1 8050 8050 1383 PIN1 4.83 V PIN13 2.8 V PIN22 1.5 V PIN32 1.4 V on page 2-2 3.51 V 3.32 V 3.36 V PIN2,3 1.3 V...
  • Page 44 RC-BM5 RC-BM5 Tuner section Voltage chart Q106 Q107 Q108 Q109 557B 547B 547B 547B 4.83 V 4.86 V 5.44 V 0.5 V 4.82 V 0.5 V FROM MAIN PCB CN802/CN804 To F-5 on page 2-2 To C-5 on page 2-2...
  • Page 45 RC-BM5 Cassette section TO MAIN PCB CN803 To A-2 and A-3 on page 2-2 CON61 CN601 Voltage chart IC601 : AN7312 PIN1 - 3 PIN4 3.41 V PIN5 1.35 V PIN6 1.24 V PIN7,8 0.01 V PIN9 1.24 V PIN10 1.35 V...
  • Page 46 RC-BM5 RC-BM5 Display section Voltage chart IC401 : PT6553 PIN1 2.4 V PIN27 2.45 V PIN2 - 6 2.41 V PIN28 - 45 2.41 V PIN7 2.4 V PIN46 - 49 4.87 V PIN8 2.45 V PIN50 - 55 PIN9 2.41 V...
  • Page 47 RC-BM5 Power amplifier and power supply section FROM MAIN PCB CN801 CN204 ( To G-2 on page 2-2 ) CN206 ( To G-2 on page 2-2 ) FROM MAIN PCB CN303 CN203 CN201 CN205 CN202 Voltage chart IC201 : BA5417...
  • Page 48 RC-BM5 RC-BM5 Printed circuit boards Main board Reverse side...
  • Page 49 RC-BM5 Tuner board Reverse side Cassette board Reverse side...
  • Page 50 RC-BM5 Display board Reverse side Power amplifier board Reverse side 2-10...
  • Page 51 RC-BM5 Volume switch board Reverse side Phone jack board Reverse side 2-11...
  • Page 52 RC-BM5 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.21129SCH 200210...