Download: SERVICE MANUAL CD PORTABLE SYSTEM RC-BX30
RC-BX30 SERVICE MANUAL CD PORTABLE SYSTEM RC-BX30 Area suffix UJ - U.S.Military Contents Safety precautions 1-2 Flow of functional operation Preventing static electricity 1-3 until TOC read 1-18 Important for laser products 1-4 Maintenance of laser pickup 1-19 Disassembly method 1-5 Replacement of laser pickup 1-19 Adjustment method 1-14 Description of major ICs 1-20 Trouble shooting 1-17 Wiring connection 1-22 No.21171 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. Dec. 2002 1. This design of this product contains special hardware and many circuits and components specially for safety purposes. ...
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Aurora Ness Shared: 7/30/19
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RC-BX30 Claw a Claw a Prior to performing the following procedures, remove the front cabinet assembly from the rear cabinet assembly. B Right speaker Left speaker assembly Rear cabinet assembly Prior to performing the following procedures, remove the front cabinet assembly from the rear cabinet assembly. A Pickup cover Capstan motor Prior to performing the following procedures, remove the cassette deck mechanism assembly from the rear cabinet assembly. Capstan motor (See Fig.17 of "Rear cabinet section" on page 1-9.) belt
SERVICE MANUAL CD PORTABLE SYSTEM RC-BX30
Area suffix UJ - U.S.Military Contents Safety precautions 1-2 Flow of functional operation Preventing static electricity 1-3 until TOC read 1-18 Important for laser products 1-4 Maintenance of laser pickup 1-19 Disassembly method 1-5 Replacement of laser pickup 1-19 Adjustment method 1-14 Description of major ICs 1-20 Trouble shooting 1-17 Wiring connection 1-22 No.21171 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. Dec. 2002, 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. 2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturer`s warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom. 3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards. 4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling. 5. Leakage currnet check (Electrical shock hazard testing) After re-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. Do not use a line isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.). Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground. AC VOLTMETER Measure the AC voltage across the resistor with the AC (Having 1000 voltmeter. ohms/volts, Move the resistor connection to each exposed metal part, or more sensitivity) particularly any exposed metal part having a return path to the chassis, and meausre the AC voltage across the resistor. 0.15 F AC TYPE Now, reverse the plug in the AC outlet and repeat each Place this measurement. Voltage measured any must not exceed 0.75 V probe on each exposed AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1500 10W metal part. Good earth ground ! 1. This equipment has been designed and manufactured to meet international safety standards. Burrs formed during molding may 2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained. be left over on some parts of the 3. Repairs must be made in accordance with the relevant safety standards. chassis. Therefore, pay attention to 4. It is essential that safety critical components are replaced by approved parts. such burrs in the case of 5. If mains voltage selector is provided, check setting for local voltage. preforming repair of this system. 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 " " mark nearby are critical for safety. (This regulation does not correspond to J and C version.) 1-2,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. 2. About the earth processing for the destruction prevention by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players. Be careful to use proper grounding in the area where repairs are being performed. 2-1 Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it. 2-2 Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body. (caption) Anti-static wrist strap Conductive material (conductive sheet) or iron plate 3. Handling the optical pickup 1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) 2.Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode. 4. Handling the traverse unit (optical pickup) 1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit. 2.Remove solder of the short land on the flexible wire after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector. 3.Handle the flexible wire carefully as it may break when subjected to strong force. 4.It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it. 5. Attention when traverse unit is decomposed *Please refer to "Disassembly method" in the text for the CD pickup unit. Short land Apply solder to the short land before the flexible wire is removed from the CD servo board. (If the flexible wire is disconnected without applying solder, the CD Fiexible wire pickup unit may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land after connecting the fiexible wire. CD pickup unit 1-3,Important for laser products
1.CLASS 1 LASER PRODUCT 5.CAUTION : If safety switches malfunction, the laser is able 2.DANGER : Invisible laser radiation when open and inter to function. lock failed or defeated. Avoid direct exposure to beam. 6.CAUTION : Use of controls, adjustments or performance of 3.CAUTION : There are no serviceable parts inside the procedures other than those specified herein may result in Laser Unit. Do not disassemble the Laser Unit. Replace hazardous radiation exposure. the complete Laser Unit if it malfunctions. 4.CAUTION : The compact disc player uses invisible ! CAUTION Please use enough caution not to laserradiation and is equipped with safety switches see the beam directly or touch it whichprevent emission of radiation when the drawer is in case of an adjustment or operation open and the safety interlocks have failed or are de check. feated. It is dangerous to defeat the safety switches. VARNING : Osynlig laserstrålning när denna del är öppnad ADVARSEL : Usynlig laserstråling ved åbning , når och spårren är urkopplad. Betrakta ej strålen. sikkerhedsafbrydere er ude af funktion. VARO : Avattaessa ja suojalukitus ohitettaessa olet Undgåudsættelse for stråling. alttiina näkymättömälle lasersäteilylle.Älä katso ADVARSEL : Usynlig laserstråling ved åpning,når säteeseen. sikkerhetsbryteren er avslott. unngå utsettelse for stråling.REPRODUCTION AND POSITION OF LABELS
CLASS 1 LASER PRODUCT 1-4,Disassembly method
Handle CD doorRemoving the handle (See Fig. 1.)
1.Open the CD door. 1 1 2.Lift the handle slightly. 3.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. Rear cabinet assembly Fig.1Removing the front cabinet assembly
and rear cabinet assembly (See Figs. 2 to 4.) A A 1.Remove the eight screws A retaining the front cabinet and rear cabinet assemblies from the rear of the main body. (See Fig.2.) 2.Open the cassette door. (See Fig.3.) 3.Slide the lower part of the front cabinet assembly slightly in the direction of the arrow 1. (See Fig.3.) 4.While removing the front cabinet assembly from the cassette knobs and remove it in the upward direction 2. (See Fig.3.) A Rear cabinet assembly A 5.Disconnect the speaker wire from the connector Fig.2 CN401 on the main board. (See Fig.4.) Main board Front cabinet assembly CN401 Rear cabinet assembly Rear cabinet assembly Cassette knobs Front cabinet assembly Fig.4 Fig.3 1-5,Removing the right and left speaker assembly
assemblies (See Fig. 5.) 1.From the inside of the front cabinet assembly, remove the six screws B retaining the right and left speaker assemblies. B B 2.Remove the solders from the soldered sections b of the right and left speaker assemblies, remove the speaker wires. Soldered section b Speaker wires Soldered section b 3.Take out the right and left speaker assemblies. Front cabinet assembly B [Note] When attaching the screws B, apply a Fig.5 locking agent to the screws B.C Front cabinet assembly Removing the cassette door gear
assembly (See Fig. 6.) 1.From the inside of the front cabinet assembly, remove the two screws C retaining the cassette door gear assembly. 2.Take out the cassette door gear assembly. [Note] When attaching the screws C, apply a Cassette door gear assembly locking agent to the screws C. C Fig.6Removing the cassette door
(See Fig. 7.) Prior to performing the following procedures, Section c remove the cassette door gear assembly. 1.While pressing the section c of the cassette door in the direction of the arrow, remove the boss d of the Section h cassette door from the section e of the front cabinet assembly. 2.Disengage the boss f of the cassette door from the section g of the front cabinet assembly. Section g Spring [Note] Be sure to hang the spring to the Boss d Boss fSection e Cassette door section h before attaching the cassette door to the front cabinet assembly. Fig.7 1-6, FM antennaD Removing the tuner board
(See Figs. 8 to 10.) 1.From the rear side of the rear cabinet assembly, remove the screw D retaining the FM antenna. (See Fig.8.) 2.Pull out the band and fine tune knobs from the Fig.8 tuner board. (See Fig.9.) CN101 Band knob 3.Disconnect the wire from the connector CN101 on Tuner board the tuner board. (See Fig.9.) Fine tune knob 4.Remove the screw E and two screws F retaining the tuner board. (See Fig.9.) 5.Take out the tuner board, then remove the screw G retaining the antenna connector plate. (See Fig.10.) F F [Note] When attaching the screws G, apply a Rear cabinet locking agent to the screws G. assembly FM antenna wireRemoving the main board Fig.9
(See Figs. 9 and 11.) Antenna connector plate 1.Disconnect the wire from the connector CN101 on the tuner board. (See Fig.9.) G 2.Pull out the volume, DBB and function knobs from the main board. (See Fig.11.) Rear cabinet 3.Disconnect the wires from the connectors CN302, assembly CN303 and CN501 on the main board. (See Fig.11.) FM antenna wire 4.Remove the solders from the soldered section i connecting the wires to the main board. Tuner board (See Fig.11.) Fig.10 DBB knob Function knob 5.Remove the three screws H retaining the main Volume knob H Rear cabinet board. (See Fig.11.) assembly Main board CN302 CN303H
CN501 Soldered section i Fig.11 1-7,Removing the cassette deck/CD Cassette deck/CD
mechanism assembly J mechanism assembly (See Figs.12 and 13.) 1.From the rear side of the rear cabinet assembly, remove the two screws J retaining the cassette deck/CD mechanism assembly. (See Fig.12.) 2.Disconnect the wires from the connectors CN302, CN303 and CN501 on the main board. (See Fig.13.) 3.Remove the two screws K retaining the cassette deck/CD mechanism assembly. (See Fig.13.) Rear cabinet assembly [Note] When attaching the screws K, apply a Fig.12 locking agent to the screws K. Cassette deck/CD mechanism assembly CN302Removing the display board
(See Figs.14 and 15.) CN303 1.From the bottom side of the CD mechanism assembly, remove the tie bands bundling the wires from the CD mechanism assembly. (See Fig.14.) 2.Disconnect the wires from the connectors BC01, CN501 BC02 and BC03 on the CD servo board. (See Fig.14.) 3.Remove the solders from the soldered section j connecting the wires to the micro switch board. Rear cabinet assembly (See Fig.14.) KFig.13 4.Remove the two screws L retaining the display board. (See Fig.15.) 5.Press the claws k in the direction of the arrow, remove the display board. (See Fig.15.) Tie band Tie bands BC03 Claws k Cassette desk Display board mechanism assembly CD mechanism assembly Micro switch board Soldered section j BC01 BC02 CD servo boardL
Fig.15 Fig.14 1-8,Removing the cassette board M
(See Fig. 16.) Soldered section n 1.From the back side of the cassette deck mechanism assembly, remove the tie band bundling the wires. 2.Remove the solders from the soldered section m connecting the wires of the capstan motor and leaf switch. 3.Remove the four screws M retaining the cassette board. M Tie band 4.From the reverse side of the cassette board, Soldered section m remove the solders from the soldered section n connecting the wires of the REC/PB head. Cassette deck Cassette board mechanism assemblyRemoving the cassette deck
Fig.16 mechanism assembly (See Fig. 17.) Prior to performing the following procedures, remove the display board. 1.Remove the solders from the soldered section p connecting the wires of the leaf switch. 2.Remove the solders from the soldered section q connecting the wires of the REC/PB head. 3.Remove the two screws N retaining the cassette deck mechanism assembly. [Note] When attaching the screws N, apply a locking agent to the screws N. Wires (REC/PB head)N Cassette board
Cassette board Wires (Leaf switch) Soldered section q Cassette board Cassette deck mechanism assembly Soldered section p Fig.17 1-9,Removing the power transformer Rear cabinet assembly
(See Figs.18 to 20.) Prior to performing the following procedures, remove the main board and cassette deck/CD Voltage selector mechanism assembly. switch 1.From the rear side of the rear cabinet assembly, remove the battery door. (See Fig.18.) 2.Remove the two screws P retaining the voltage selector switch. (See Fig.18.) P 3.From the inside of the rear cabinet assembly, remove the three screws Q retaining the cassette deck bracket. (See Fig.19.) 4.Remove the solders from the soldered section r Battery door and s connecting the wires(red and black). Fig.18 (See Fig.19.) Rear cabinet assembly 5.Remove the two screws R retaining the power transformer. (See Fig.20.) 6.Remove the two screws S retaining the socket cover. (See Fig.20.) 7.Take out the power transformer together the socket cover and voltage selector switch. [Note] When attaching the screws P and R, apply a locking agent to the screwsPPand R. Cassette deck bracket Fig.19 Socket cover S Wire (red) Soldered section rR Voltage
selector switch Soldered section s Power transformer Wire (black) Fig.20 1-10,Removing the CD mechanism BC03 Cassette deck
assembly (See Fig. 21.) CD mechanism mechanism assemblyassembly Rubber (orange) Prior to performing the following procedures, remove the cassette deck/CD mechanism Rubber (pink) assembly. (See Figs.12 and 13.) 1.From the bottom side of the cassette deck/CD mechanism assembly, disconnect the wires from the connectors BC01, BC02 and BC03 on the CD servo board. 2.Remove the four screws T retaining the CD mechanism assembly.T T
[Note] When replacing the CD mechanism assembly, be sure not to mistake the Rubber (oranmge) positions of the pink and orange BC01 BC02 Rubber (pink) rubbers. Fig.21Removing the micro switch board
(See Fig. 22.) Soldered section t 1.From the bottom side of the cassette deck/CD mechanism assembly, remove the solders from the Micro switch soldered section t connecting the wires. board 2.Remove the screw U retaining the micro switch board.U Removing the CD gear assembly
(See Fig. 23.) V 1.From the bottom side of the cassette deck/CD mechanism assembly, remove the two screws V retaining the CD gear assembly. Cassette deck/CD CD gear assembly mechanism assembly 2.Take out the CD gear assembly. Fig.22Removing the CD door (See Fig. 23.) CD door Section w
1.Open the CD door. Spring 2.While pressing the arm section u of the CD door in Arm section v Arm section u the direction of the arrow, remove the arm section u. 3.Disengage the arm section v of the CD door, remove the CD door. [Note] When attaching the CD door, hang the spring to the section w of the CD door. Fig.23 1-11,Removing the CD pickup unit
(See Figs. 1 to 3.) Prior to performing the following procedures, remove the CD mechanism assembly. A 1.Remove the three screws A retaining the CD pickup cover. (See Fig.1.) 2.Remove the slit washer retaining the feed middle A gear and take out the feed middle gear. (See Fig.2.) 3.Loosen the two screws B retaining the shaft and pull out the shaft in the direction of the arrow. (See Fig.2.) CD mechanism assembly Fig.1 4.Take out the CD pickup unit. CD pickup unit [Caution] Be sure to apply the solder in order to the short land section a on the CD pickup unit before removing the flexible wire from the CD pickup unit. (See Fig.2.) If the flexible wire is disconnected without apply this solder, the CD pickup may be damaged. Short land section a 5.From the bottom side of the CD mechanism Sliding spring CD pickup unit assembly, remove the solders of the flexible wire from the soldered section b on the CD servo board. Shaft [Caution] After re-connecting the flexible wire, be sure to remove the solder from the short land section a.B
[Note] In the assembly, be sure to attach the sliding spring in the correct orientation before attaching the CD pickup unit. (See Fig.2.) Feed middle gear Slit washer B Fig.2 Soldered section b CD servo board Fig.3 1-12,Removing the capstan motor
(See Figs.1 and 2.) 1.Remove the capstan motor belt. 2.Remove the two screws A retaining the bracket of Flywheel assembly the capstan motor from the cassette deck mechanism assembly. Fig.1 3.Remove the two screws B retaining the bracket Capstan motor from the capstan motor. (See Fig.2.)Removing the leaf switch (See Fig.3.)
Pressing the claw a of the leaf switch in the direction of the arrow 1 and take out the leaf switch Bracket in the direction of the arrow 2. BRemoving the pinch roller arm Fig.2Leaf switch
assembly (See Fig.4.) Remove the screw C retaining the pinch roller arm 2 assembly and remove the pinch roller arm assembly in an upward direction. [Note] In the assembly, hang the notch b of the pinch roller arm assembly to the spring.Removing the erase head 1
(See Fig.4.) Claw a Remove the screw D retaining the erase head and Fig.3 remove the erase head in an upward direction. REC/PB head Main belt Flywheel assemblyRemoving the REC/PB head (See Fig.4.) Remove the screw E, washer and screw F retaining the REC/PB head and remove the REC/PB head. [Notes] When removing or replacing theDCREC/PB head, perform the REC/PB head adjustment. (See "Adjustment method".) After adjusting the REC/PB head, apply Pinch roller a locking agent to the screws E and F. armErase head assembly Washer Notch bRemoving the flywheel assemblyEFSpring
(See Figs. 4 and 5.) Fig.4 1.From the bottom side of the cassette deck Shaft Slit washer mechanism assembly, remove the main belt. 2.From the top side of the cassette mechanism assembly, remove the slit washer retaining the shaft of the flywheel assembly. Main belt Cassette deck 3.Pull out the flywheel assembly in the direction of Flywheel assemblymechanism assembly the arrow. (See Fig.5.) Fig.5 1-13,Adjustment method Measuring instructions required for Measuring instruments
adjustment Radio section 1. AM signal generator FM 1kHz, 22.5kHz deviation 2. FM signal generator FM STEREO : 1kHz, 67.5kHz deviation 3. Inter mediate frequency sweep generator pilot signal 7.5kHz 4. FM stereo signal generator AM : 1kHz, 30% modulation 5. Low-frequency oscillator Reference output : (oscillation frequency 50Hz-20kHz, 0dB output Speaker output 0dBs (0.447V)/4 ohm with 600 ohm impedance) H.phone output -10dBs (0.245V)/32 ohm 6. Attenuator (600 ohm impedance) Standard position of function switch : 7. Electronic voltmeter Selects FM in tuner mode 8. Distortion meter Bass boost: OFF 9. Torque gauge (cassette for CTG-N) Main volume: Reference output 10. Wow & flutter meter 11. Frequency counter meter Amplifier section 12. Test tape Reference output : VT712 : For tape speed and wow flutter Speaker output 0dBs (0.447V)/4 ohm VT724 : For reference level H.phone output -10dBs (0.245V)/32 ohm VT702 : For playback frequency Standard position of function switch : VT702 : For head azimuth adjustment Selects TAPE mode 13. Blank tape CD section TAPE : AC-225 CD test disc : CTS-1000Measurement conditions
Power supply voltage AC110V-127V/210V-230V (60Hz/50Hz) 1-14,Cassette amplifier section
Item Measuring condition Check and adjustment procedure Standard value Adjusting part Head azimuth Test tape: 1.Play back the test tape VT702 (8kHz). Output level: Head azimuth adjustment VT702 (8kHz) 2.Adjust the head azimuth adjusting screw so that the Within (+2dB-2dB) of adjusting screw Signal output terminal: phase difference between the R and L channels is maximum output (To be used only PHONES minimized at an output level that is within (+2dB-2dB) level after head (with 32 ohm load) of the maximum output level in the FWD and REV Phase difference R replacement) operations. After this adjustment, lock the head and L channels: See Fig.1 on azimuth adjusting screw with screw sealant to cover Minimum page 1-16. more than a half of the screw head. 3.When the head azimuth is maladjusted, correct it with the head azimuth adjusting screw in the FWD and REV operations alternately. Tape speed and Test tape: 1.Play back the test tape VT712 (3kHz) by the end Tape speed: wow/flutter check VT712 (3kHz) portion. Motor semifixed and adjustment Signal output terminal: 2.Connect a frequency counter and check that it reads 2940 to 3090Hz resistor PHONES between 2940 and 3090Hz. If not, adjust the (with 32 ohm load) frequency with the motor semifixed resistor. 3.Check that the wow/flutter is within 0.38% Within 0.38% See Fig.2 on (unweighted). (unweighted) page 1-16. Check only PB frequency Test tape: VT702 Play back the test tape VT702 while con-firming that Deviation between response check Signal output terminal: deviation between the 1kHz signal and 8kHz signal 1kHz and 8kHz: PHONES should be 0(+3dB~-6)dB. 0(+3dB~-6)dB (with 32 ohm load) Bias frequency Tape: Normal Set the FUNCTION switch to TAPE and the record L201 check Signal output terminal: and play tape mechanism, check to see if the See Fig.4 on Cassette REC./PLAY frequency at the measuring point is (80kHz+2kHz page 1-16. HEAD -2kHz) if not adjust L201 until the frequency counter indicates (80kHz+2kHz-2kHz). REC and PB Test tape: AC225 Set the FUNCTION switch to the radio position, set Level difference frequency Signal input: the BAND switch to the FM position, and record the between REC and response FM22.5 DEV 60dBu reference 1kHz signal and 8kHz signal alternately PB: Within adjustment with emphasis repeatedly. While playing back the recorded signal 0 (+3~-6)dB Signal output terminal: differ from that of the 1kHz signal by within 0 (+3~ PHONES -6)dB. (with 32 ohm load)Tuner section
Item Measuring condition Check and adjustment procedure Standard value Adjusting part MW/SW Signal input: 1.Set the intermediate frequency sweep generator to T102 IF adjustment Loop ANTENNA MW/SW 455kHz. See Fig.3 on Signal output: 2.Adjust the T102 for maximum and center output. page 1-16. IC101 pin19 FM IF adjustment Signal input: 1.Set the intermediate frequency sweep generator to T101, T103 FMANT, FMGND FM (10.7MHz). See Fig.3 on Signal output: 2.Adjust the T101, T103 for maximum and center page 1-16. IC101 pin19 output. SW tracking Signal input: 1.Set the dial at low end, set the S/G at (5.75MHz L104 adjustment Dummy antenna +0.4MHz-0.4MHz). Adjust the L104, check to see the ANT output is maximum. GND 2.Set the dial at high end, set the S/G at (17.8MHz VC101 Signal output: +0.5MHz-0.5MHz). Adjust the VC101, check to see PHONES the output is maximum. (with 32 ohm load) 3.Set the dial while receiving a 7MHz signal from S/G at L101 maximum. Adjust the L101, check to see the output is See Fig.3 on maximum. page 1-16. 1-15,Tuner section
Item Measuring condition Check and adjustment procedure Standard value Adjusting part FM tracking Signal input: 1.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 ANT to see the output is maximum. GND 2.Set the dial at high end, set the FM signal generator PVC11-C2 Signal output: at (108.25MHz+0.25MHz-0.25MHz). Adjust the PHONES PVC11-C2, check to see the output is maximum. (with 32 ohm load) 3.Set the dial while receiving a 90MHz signal from an L106 FM signal generator at maximum. Adjust the L106 for maximum output. 4.Set the dial while receiving a 106MHz signal from an PVC11-C1 FM signal generator at maximum. Adjust the PVC11 See Fig.3 on -C1 for maximum output. page 1-16. 5.Repeat the adjustment of the above steps 3 and 4. MW tracking Signal input: 1.Set the dial at low end, set the S/G at (515kHz+5kHz L105 adjustment Loop antenna -5kz). Adjust the L105, check to see the output is Signal output: maximum. PHONES 2.Set the dial at high end, set the S/G at (1620kHz PVC11-C4 (with 32 ohm load) +15kHz-15kHz). Adjust the PVC11-C4, check to see the output is maximum. 3.Set the dial while receiving a 600kHz signal from an L102 AM signal generator at maximum. Adjust the AM ANT COIL L102 for maximum output. 4.Set the dial while receiving a 1400kHz signal from an PVC11-C3 AM signal generator at maximum. Adjust the PVC11 See Fig.3 on -C3 for maximum output. page 1-16. 5.Repeat the adjustment of the above steps 3 and 4.Location of adjusting parts Cassette mechanism section
(Caution) For adjusting any head, be sure to use a screw driver degaussed. Adjustment Head CASSETTE MOTOR max Azimuth adjustment screw Tape Speed Adj.Fig.1 Head output signal Fig.2 Tuner board Cassette board
IC101Fig.3 Fig.4
1-16 L201 (Bias Frequency Adj.),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. Defective earphone jack Replace the earphone jack. MW No sound, weak Improper location of unit Rotate or reposition the unit. sound (Low sensitivity) Defect in IFT102 Check resistance, voltage and current. Replace as needed. Defect MW antenna coil L102 or Replace if necessary. oscilloscope coil L105 Intermediate frequency tuning faulty Readjust (see "Adjustment method"). MW tracking faulty Readjust (see "Adjustment method"). Defective IC101 Check voltages. Replace if necessary. Defective Q101, Q102, Q103, Q104, Q105 Check voltages. Replace if necessary. SW No sound, weak SW antenna not connected Connect the built-in external antenna sound (Low sensitivity) Defect in IFT102 Check resistance, voltage and current. Replace as needed. Defect SW antenna coil or oscilloscope coil Replace if necessary. Intermediate frequency tuning faulty Readjust (see "Adjustment method"). SW tracking faulty Readjust (see "Adjustment method"). Defective IC101 Check voltages. Replace if necessary. Defective Q101, Q102, Q103, Q104, Q105 Check voltages. Replace if necessary. FM No sound, weak FM antenna not connected Connect the built-in external antenna sound (Low sensitivity) Defective band selector switch Replace or repair the switch Defective IC101 Check voltages. Replace if necessary. Intermediate frequency tuning faulty Readjust (see "Adjustment method"). Poor contact in FM antenna circuit Resolder or repair as required. Tape No sound/recording, Dirty capstan or head Clean the capstan or head with alcohol. unsteady tape sound, weak sound Irregular cassette tape winding Replace tape. Defective IC201 Check voltages. Replace if necessary. Cassette erasure prevention tabs broken out Replace tape or cover tab openings with adhesive tape. CD Cannot read the table Disc is inserted upside down. Insert disc correctly. of content. No display, no sound Disc is dirty. Wipe clean with a soft cloth. Disc is scratched. Use a new disc. Disc is seriously warped. Use a new disc. A non-standard disc has been inserted. Use only a brand name disc. Moisture has formed inside the CD deck. Wait about 20 to 30 minutes. Defect in the servo control board Replace or repair as required. Defect in the CD pickup mechanism Replace as required. 1-17,Flow of functional operation until TOC read
Power ON Slider turns REST SW ON. Laser ON Focus startFOK
Turn on focus servo Disc spinning Radial_error scaling PLL Lock Turn on radial servo Read TOC 1-18,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. swab. (2) Life of the laser diode When the life of the laser diode has expired, Replace the pickup with a normal one.(Refer the following symptoms will appear. to "Removing the CD pickup" on the previous page) The level of RF output (EFM output:ampli- tude of eye pattern) will below. Plug the power cord in,and turn the power on. At this time,check that the laser emits for Is the level of NO about 3 seconds and the objective lens moves RF OUT under Replace it. up and down. 1.25V 0.22Vp-p? Note: Do not observe the laser beam directly.YES
Play a disc. O.K Check the eye-pattern at the "RF" test point. Finish. (3) Semi-fixed resistor on the APC PC board The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power. Since this adjustment should be performed to match the characteristics of the whole optical block, do not touch the semi-fixed resistor. If the laser power is lower than the specified value,the laser diode is almost worn out, and the laser pickup should be replaced. If the semi-fixed resistor would be adjusted when the pickup operates normally,the laser pickup may be damaged due to excessive current. 1-19,Description of major ICs AN7312 (IC201) : Dual recording/Playback pre-amplifier circuit with ALC
1. Terminal layout 2. Block diagram Vcc 14 13 12 11 1098114 2 13 Ripple Filter Amp. 3 12 Ch2 4 11 ALC 5 1069Amp. Ch1781234567GND
3. Pin function Pin No. Symbol I/O Function 1 GND - GND 2 ALC time constant - ALC time constant by resistance and capacitor 3 ALC input Ch.1 I Right channel ALC input 4 Output Ch.1 O Right channel output 5 Phase compensation Ch.1 - Not connect 6 N.E.B. Ch.1 I Right channel negative feed back input 7 Input Ch.1 I Right channel signal input 8 Input Ch.2 I Left channel signal input 9 N.E.B. Ch.2 I Left channel negative feed back input 10 Phase compensation Ch.2 - Not connect 11 Output Ch.2 O Left channel output 12 ALC input Ch.2 I Left channel ALC input 13 Ripple filter - Ripple filter 14 Vcc - Power supplyLA1824 (IC101) : Tuner
1. Terminal layout & Block diagram 24 23 22 21 20 19 18 17 16 15 14 13 FM FM RF CND2 Vcc2 OSC DECODERPHASE
COMP DET FM TRIG ST-SW VCO FF FF FFMIX PILOT AM
MIX S-METER DET AGCAM
RF REG AMOSC Vcc1 GND1 TUN ST LED LED FM-IF AM-IF12345678910 11 12 1-20,TA8227P (IC401) : Amplifier
1. Terminal layout 2. Block diagram SDBY VC 1 12 SDBY 1 12 VC ROUT 2 11 LOUT 3 RBS RBS 3 10 LBS RIN 6 13 14 CH-1 2 ROUT 45W SGND49RIP RNF 5 RNF58LNF 30kW RIN67LIN Bias Circuit RIP 9 Thermal Shut Down 4 S-GND Protection Circuit LIN 7 CH-2 11 LOUT 45W LNF 8 10 LBS 30kW pre-GNDMC14094 (IC601) : XXXXX
1. Terminal layout STR 1 16 VCC0215 CE CP 3 14 OP4 OP0 4 13 OP5 OP1 5 12 OP6 OP2 6 11 OP7 OP3 7 10 OS2 GND89OS1 1-21,Wiring connection
110-127V 220-230V AC INPUT POWER SELECT SWITCH (Voltage selector switch) 1-22 SPEAKER L SPEAKER R Power transformer OW20-42042-09K OW20-42042-16KMain board
BATT+ (Forward side) 14666102119RCH L CH41CN4014461110 10 AC SOCKET 11 Tuner board 4 (Forward side) 2 4CD MODULE
1614BATT- 4 (CD servo board) DECK HEAD61(REC/PB head) 1 1052940611Cassette board 0 Display board
(Forward side) 231(Forward side) 0 Color codes are shown below. 1 BROWN 6 BLUE OW20-41032-06K 2 RED 7 VIOLET94023ORANGE 8 GREY Micro switch board(Forward side) 4 YELLOW 9 WHITE 5 GREEN 0 BLACKRC-BX30 UJ VERSION
CN501 CN303 CN302, < MEMO> 1-23,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,JapanNo.21171 200212
]15
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