Jvc FSG 6 Service Manual

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1-2 Safety Precautions 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. Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to eachexposed metal part, particularly any exposed metal part having a return path to the chassis, and meausre the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. voltage measured Any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). Warning 1. This equipment has been designed and manufactured to meet international safety standards. 2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained. 3. Repairs must be made in accordance with the relevant safety standards. 4. It is essential that safety critical components are replaced by approved parts. 5. If mains voltage selector is provided, check setting for local voltage. Good earth groundPlace this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE ! 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. UX-G6/FS-6G

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1-3 UX-G6/FS-G6 Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions. 4.CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches whichprevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. It is dangerous to defeat the safety switches.5.CAUTION : If safety switches malfunction, the laser is able to function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. VARNING : Osynlig laserstrålning är denna del är öppnad och spårren är urkopplad. Betrakta ej strålen. VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen.ADVARSEL : Usynlig laserstråling ved åbning , når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling. ADVARSEL : Usynlig laserstråling ved åpning,når sikkerhetsbryteren er avslott. unngå utsettelse for stråling. REPRODUCTION AND POSITION OF LABELS WARNING LABEL DANGER : Invisibie laser radiation when open and interlock or defeated. AVOID DIRECT EXPOSURE TO BEAM (e) VARNING : Osynlig laserstrålning är denna del är öppnad och spårren är urkopplad. Betrakta ej strålen. (s) VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen. (f) ADVARSEL :Usynlig laserstråling ved åbning , når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling. (d) CLASS 1 LASER PRODUCT ! CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check.

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1-15 UX-G6/FS-G6 31 English Troubleshooting If you are having a problem with your system, check this list for a possible solution before calling for service. If you cannot solve the problem from the hints given here, or the units has been physically damaged, call a qualified person, such as your dealer, for service. Symptom No sound is heard. Poor radio reception. Unable to record onto a tape. The CD skips. Unable to operate using the remote control. Loaded CD and tape cannot be ejected. The CD does not play. Operations are disabled. Possible Cause - Connections are incorrect, or loose. - Headphones are connected. - Volume level is set to -“ -“. - The antenna is not connected correctly. - The AM loop antenna is too close to the units. - The FM antenna is not properly extended and positioned. - You are using a tape without a protect tab. - Tape-type detection slots are covered by foreign matters. - The CD is dirty or scratched. - The path between the remote control and the remote sensor on the front panel is blocked. - The batteries have lost their charge. - The main AC power cord is not plugged in. - The system is under the recording operations. - The CD is upside down. - The built-in microprocessor has malfunctioned due to external electrical interference. Action - Check all connections and make corrections (see pages 6 -“ 9). - Disconnect the headphones (see page 12). - Adjust the volume again (see page 12). - Reconnect the antenna securely. - Change the position and direction of the AM loop antenna. - Extend FM antenna to the best reception position (see page 7). - Cover the hole with adhesive tape (see page 30). - Remove the foreign matters. - Clean or replace the CD (see page 29). - Remove the obstruction. - Replace the batteries (see page 6). - Plug in the AC power plug. - Stop the recording if required (see pages 23). - Put in the CD with the label side up. - Unplug the system then plug it back in. 32 English Specifications Stereo Amplifier AX-UXG6Output power 48 W (24 W + 24 W) at 6 -„¦ (Max.) Load impedance: 6 -„¦ (6 -„¦ to 16 -„¦ allowance) Audio output level/Impedance (at 1 kHz): Sub Woofer 800 mV/440 -„¦ Power requirement: [A] AC 110 V -“ 120 V/220 V -“ 240 V , [B] AC 115 V/230 V (adjustable with the voltage selector), 50 Hz/60 Hz Power consumption: [A] 59 W (at operation) [B] 54 W (at operation) 2.0 W (on standby: with Dimmer) Dimensions (approx.): 182 mm x 81 mm x 313 mm (W/H/D) Mass (approx.): 3.8 kg Compact Disc/ Tuner XT-UXG6Audio input sensitivity/Impedance (at 1 kHz): AUX: 400 mV/47 k-„¦ [CD section] Digital output: OPTICAL DIGITAL OUT Wow and flutter: Immeasurable [Tuner section] FM tuning range: 87.50 MHz -“ 108.00 MHz AM tuning range: 531 kHz -“ 1,710 kHz (at 9 kHz channel spacing) 530 kHz -“ 1,710 kHz (at 10 kHz channel spacing) Dimensions (approx.): 181 mm x 81 mm x 313 mm (W/H/D) Mass (approx.): 1.9 kg Cassette Deck TD-UXG6Frequency response : Normal 30 Hz -“ 15,000 Hz High position 30 Hz -“ 16,000 Hz Wow and flutter: 0.1 % WRMS Dimensions (approx.): 181 mm x 81 mm x 304 mm (W/H/D) Mass (approx.): 1.9 kg Speaker System SP-UXG6Type: 2-way Bass-Reflex Type Speaker unit: Woofer 11.5 cm Cone x 1 Tweeter 3.0 cm Balanced Dome x 1 Impedance: 6 -„¦ Frequency range: 40 Hz -“ 20,000 Hz Sound Pressure Level: 85.5 dB/W-m Dimensions (approx.): 157 mm x 295 mm x 232 mm (W/H/D) Mass (approx.): 3.3 kg each Supplied AccessoriesSee page 6. Design and specifications are subject to change without notice. US and foreign patents licensed from Dolby Laboratories Licensing Corporation.

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2-14 UX-G6/FS-G6 Removing the analog in/digital out board and the relay board (See Fig.8 to 10) - Prior to performing the following procedure, remove the top cover, the rear panel and the system control board. 1. Cut the tie band fixing the harness on the side of the body. Disconnect the harness from connector CN451 on the analog in/digital out board and remove the screw G attaching the analog in/ digital out board. 2. Disconnect connector CN455, CN456 and CN457 on the analog in/digital out board from the connector on the main & CD servo board. 3. Disconnect connector CN443 on the relay board from the connector on the main & CD servo board. Removing the tuner board (See Fig.11) - Prior to performing the following procedure, remove the top cover and the rear panel. 1. Disconnect CN506 on the system control board. 2. Remove the screw H attaching the tuner board. Fig. 8 Fig. 9 Fig. 10 Fig. 11 CN451 Tie band Analog in/digital out board G CN451 CN455 CN456 CN457 Analog in/digital out board Main & CD servo board Relay board Main & CD servo board CN443 CN506 H Tuner boardSystem control board