JVC-RMRE9000-sc-sm 维修电路原理图.pdf
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1、SERVICE MANUALSYSTEM CONTROLLERNo.20934Apr. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.RM-RE9000RM-RE9000Area Suffix EContinental EuropeContentsSafety PrecautionsAdjustment methodDescription of major ICs1-21-31-68dBPHASEDISPLAYSLEEPdBSPEAKER1-180212PRESENCEEXTPROCESSORSOURCE GAINPRESETAMP GAINP
2、RESETLINE 1LINE 2LINE 3LINE 5LINE 4LINE 6MUTINGATTMASTER VOLUMEEACHALL12345678RadioFans.CN 收音机爱 好者资料库RM-RE90001-21. 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 origina
3、l 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 p
4、roduct should not be made. Any design alterations or additions will void the manufacturers 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-relate
5、d 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 identifi
6、ed 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 pa
7、rts 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
8、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 p
9、erform 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
10、 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
11、 (r.m.s.).Alternate check methodPlug 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 g
12、round.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 e
13、ach measurement. voltage measured Any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 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 ma
14、intained.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 exposedmetal part.AC
15、 VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE!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.In regard with component parts appearing on the silk-screen p
16、rinted 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. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacture
17、r. (Except the JC version)http:/getMANUAL.comRadioFans.CN 收音机爱 好者资料库RM-RE90001-3Remove the four screws A on the front with a hexagon wrench.Place the reverse side of the set upward.After taking off the cushions from the four places, remove the four screws B at the inside of the rear cover.Remove the
18、 screw B at the inside of the battery cover.Remove the rear cover and the front panel assembly. (Because they should have been tightly engaged, remove them with due care.)Remove the battery holder board assembly from the rear cover by pulling it up. 1.2.3.4.5.6.Disassembly methodRemoving the rear co
19、ver (See Fig.1 to 3)Fig.1Fig.2Fig.3AABBBFront panel assemblyBattery holder board assemblyBBRear coverRM-RE90001-4Remove the rear cover.Remove the two screws C attaching the remote controller transmission board assembly.Remove the connector CN201 connecting the main board assembly to the remote contr
20、oller transmission board assembly.1.2.3.Removing the remote controller transmission board assembly (See Fig.4)Remove the rear cover.Remove the remote controller transmission board assembly.After taking off the screws D & E attaching the volume knob and the rotary switch, remove their knobs.After tak
21、ing off the nut F attaching the volume board assembly with a box-type driver, remove the volume board assembly.After taking off the nut G attaching the rotary switch board assembly with a box-type driver, remove the rotary switch board assembly.Remove the fourteen screws H attaching the main board a
22、ssembly.Remove the connector CN103 connecting the main board assembly to the volume board assembly, and the connector CN301 connecting the main board assembly to the rotary switch board assembly, respectively.1.2.3.4.5.6.7.Removing the main board assembly (See Fig.5 to 7)Fig.4Fig.5Fig.6CMain board a
23、ssemblyEVolume knobRotary switch knobCN103FDRemote controller transmission board assemblyGCN201Fig.7Rotary switch board assemblyCRotary switch knobVolume knobMain board assemblyHCN301HVolume board assemblyRM-RE90001-5Remove the rear cover.Remove the remote controller transmission board assembly.Remo
24、ve the main board assembly.Remove the two screws I attaching the modular jack board assembly.Remove the connector CN501 connecting the main board assembly to the connector terminal board assembly.1.2.3.4.5.Removing the modular jack board assembly (See Fig.8)Remove the rear cover.Remove the remote co
25、ntroller transmission board assembly.Remove the main board assembly.Remove the modular jack board assembly.Remove the seven screws J attaching the switch board.Remove the board by lifting it.1.2.3.4.5.6.Removing the switch board (See Fig.9) Removing the top panel (See Fig.10)Remove the rear cover.Re
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