Jvc-HAW-500-RF-Service-Manual 电路图 维修手册.pdf

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1、SERVICE MANUAL CORDLESS FM STEREO HEADPHONES No.70270 Sep. 2002 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. HA-W500RF (EG)/(EK) HA-W500RF (EG)/(EK) Specifications * Design and specifications subject to change without notice. Transmitter (J22121-001) Power requirements: DC 9 V (with the exclusive AC

2、 adaptor J47126-001(EG Model) /J47127-001(EK Model) Audio input terminal: 3.5 mm dia. stereo mini plug Input impedance : 25 k Reference input level : 300 mV Dimensions: 100(W) x 100(D) x 106(H) mm (3-15/16 x 3-15/16 x 4-3/16) (Including antenna) Mass : 115(4.1 oz) (Without connection cord and AC ada

3、ptor) Provided Accessories Instructionsx 1 AC adaptorx 1 Connection cord x 1 (3.5 mm dia. stereo mini jack- RCA pin plug x 2 : 0.1 m (0.3 ft) Plug adaptorx 1 (converts 3.5 mm dia. stereo mini plug to a 6.3 mm dia. standard stereo phone plug) General Specifications System: Radio Frequency (UHF stereo

4、) Modulation: Frequency modulation Carrier frequency: 863-865 MHz Usable area (distance to reach) : Approx. 100m (328 ft) : using JVC measurements systems Frequency response : 30 Hz-15,000 Hz Distortion : Less than 4 % (at 1 kHz) Contents Headphones (HA-W500RF) Power requirements : Rechargeable Ni-C

5、d battery (1.2 V) x 2 Battery running time : 20 hours (When charged for 24 hours) Mass: 280(9.9 oz) (With installed rechargeable Ni-Cd battery x 2) Specifications - Front cover 1. Disassembly - 3 2. Schematic Diagram - 4 3. Measurement Condition - 5 4. Print Circuit Board - 5 5. Wiring Diagram - 7 6

6、. Block View Inside IC - 7 7. Block Diagram - 8 8. Electric Parts List - 8 9. Exploded view - 9 10 .Mechanical Parts List - 9 11. Packing Method - 10 12. Packing Materials Parts List - 10 13. Accessories List - 10 RadioFans.CN 收音机爱 好者资料库 HA-W500RF (EG)/(EK) 2 (No.70270) Safety Precautions 1. This de

7、sign 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 origina

8、l 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 manufacturers warranty and will further relie

9、ve 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

10、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 schem

11、atics 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

12、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

13、 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 he

14、ads, 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

15、 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, 1,0

16、00 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 eachexpos

17、ed 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.).

18、 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 t

19、hat safety critical components are replaced by approved parts. 5. If mains voltage selector is provided, check setting for local voltage. Good earth ground Place this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE RadioFans.CN 收音机

20、爱 好者资料库 HA-W500RF (EG)/(EK) (No.70270) 3 R L R 3 1 7 8 6 5 2 12 10 1 4 9 4 11 4 4 14 13 15 R 1.Disassembly Receiver(Headphones) Transmitter In case of some problems arise in this transmitter unit, have to change the transmitter unit itself, due to avoid the law of radio regulation. 1.Remove the ear

21、pad 1 from the driver unit assy (L) 2 and (R) 3. 2.Remove the screw 4 and pull up the driver unit assy (L) 2 and (R) 3. 3.At channel L. Remove the screw 5 and insulation washer 6, and pull up the charge print circuit board 7. 4.Remove the switch knob 8. 5.Remove the screw 9 and remove the battery do

22、or 10 from the housing assy (L) 12. 6.Remove the battery 11 from the housing assy (L) 12. 7.At channel R. Remove the main print circuit board 13 from the housing (R) 14 8.Remove the wire with solder from the charge and main print circuit board 7 13, then remove the headband assy 15. RadioFans.CN 收音机

23、爱 好者资料库 HA-W500RF (EG)/(EK) 4 (No.70270) Notes: 1. The thick line ( ) is the B (+) power supply. 2. This circuit diagram is the reference diagram. Circuits and constans are subject to change without notice for improvement. 3. Values printed in red show the voltares of each section measured by the te

24、ster (internal resistance 20 kOhms/V), with the power switch ON. 4. Parts marked with (in the shaded area ) are safety parts.When replacing these, be sure to use only the designated parts to ensure safety. Use of Circuit Diagram * N750 Test-1 High RF in Test-3 Low RF in Test-8 VCC Test-7 GND Test-5

25、R out Test-6 L out VR3 795.1Mhz VR4 791.5Mhz OFF ON JX1 CHARGE OUTPUT TERMINAL Rout Lout Test-9 STEREO 21628 11 6 23 3 3020 5 17 1 214 1529 18 25 IC2 CXA1538M 10 27 26 8139 722 Rout Lout (C74) Test-10 VT TEST-11 REF V X3 10.7M C47 100 0p + C72 4U7 1k5 R13 D4 4148 C8 100p D2B GREEN C40 1u R12 330 C49

26、 7p C41 1u + C254U7 + C43 220u C42 0.1u + - IC4B 5 6 7 84 C73 0.1u L3 12nH R37300 C45 0.1u + C27 1U TC1 1.5-3p VR4 5k 1k R25 1k R26 C48 100 0p R40 1M D3 4148Q68550 Q7 3904 R41 75k Q8 3904 +C38 100u 27k R22 27k R23 C22 12p C75 0.01u 2k7 R19 VR2 100k + - IC4A LM393 or NJM2903M LM393 or NJM2903M 3 2 1

27、84 2k7 R20 S1a SW SPDT R42 50K S1bSW SPDT + C73 220u R14 100K + C32 220u VR1b 100k VR1a 100k C76 100p L9 15nH + C36 2U2 + C37 2U2 T2 R31 2K2 +C44 10u C77 1p C78 1p C83 10p L1 15nH C881000p + C28 4U7 + C26 1U + C29 33U + C31 10U IC1 7201-15 31 2 VIVO GND Q9 5508 R56 0 Q1 5094 R49 27K +C32 0.47u R50 3

28、30 R53 27K C30 0.01U C81 0.01U Q11 5508 R54 330 + C23 10U C24 0.1U + C54 2u2 + C55 2u2 IC5 78L06 31 2 VIVO GND R34 2k2 + C33 4U7 C10 10p C59 10u 1K R24 C61 10u C60 47u SPK1 32ohm SPK2 32ohm C84 0.01u R30 1k C17 3P* C20 2P(N) R47 18k ANT1 1 VR5 5K R33 2K2 R32 3K3 C39 1000p IC3 LM4809 2 7 1 35 4 6 8 I

29、N1 OUT2 OUT1 BY PASSMUTE GND IN2 VCC VR3 5k R35 100k R36 100k R38 100k R434k7 R39 68k C19 0.001u R4410k 1k R27 R4510k 1k R28 C1 3p* C3 5p6 L8 0.33uh C53 56P X1C2 3P* R2 39k R4 470 100 R29 C5 1u R1 18k D1 V809 C46 0.1u R11 100 T1 C874p X2 10.7MHz R15 3k3 R16 3k3 C34 0.015u C35 0.015u D2A RED C51 22P

30、C52 0.01u 10 R18 C21 12p 100K R21 R46 82K X4 863MHz L2 15nH C80 0.01u BATTERY 2.4V Test-3 Test-1 Test-8 Test-9 Test-5 Test-6 Test-7 Test-10 Test-11 ! ! ! ! ! 2.Schematic diagram + - HA-W500RF (EG)/(EK) (No.70270) 5 4.Print Circuit Board Back side Receiver (Headphones) CHARGE P. C. BOARD TOP 3.Measur

31、ement Condition AC IN TransmitterReceiver (Headphones) Distance : 1m (3.28ft) Reference input signal:1kHz 300mVp-p sine wave Hedaphone volume control: MAX Surface shows the B(+) power supply shows the ground shows others. HA-W500RF (EG)/(EK) 6 (No.70270) 4.Print Circuit Board Surface Back side shows

32、 the B(+) power supply shows the ground shows others. Receiver (Headphones) MAIN P.C.BOARD TOP A 1234 B C D Receiver (Headphones) MAIN P.C.B. LOCATION Symbol IC2 IC3 IC4 IC5 Q6 Q7 Q8 X2 X3 D2 D3 D4 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 Location 2B 2A CHG.PCB CHG.PCB CHG.PCB CHG.PCB CHG.PCB 3C 2B CHG.PCB CH

33、G.PCB CHG.PCB Symbol R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R31 R32 R33 R34 R35 R36 Location 1B CHG.PCB 2B 3B 3B CHG.PCB 2A 2A 2A 3A 2A 3D 4C 4C 4C 4C 3D 3C 2B 2B 2B CHG.PCB CHG.PCB Symbol R37 R38 R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49 R50 VR1 VR2 VR3 VR

34、4 VR5 JP1 JP2 JP3 JP4 C21 C22 Location CHG.PCB CHG.PCB CHG.PCB CHG.PCB CHG.PCB CHG.PCB CHG.PCB CHG.PCB CHG.PCB CHG.PCB CHG.PCB 3A 4B 4C 4C 1B 1C 3D 3D 1B 2C Symbol C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 C43 C44 C45 C46 C47 C48 Location 1C 1C 1B 3B 3B 2B 3B 3C

35、 1B 2B 3B 3B 3B 3A 3A 2A 3D 2D 2D 4D 4C 3C 4B 3D Symbol C49 C50 C51 C52 C53 C54 C55 C59 C60 C61 C72 C73 C74 T1 T2 L8 Location 2B 2C 3B 3A CHG.PCB CHG.PCB CHG.PCB 2A 3A 2A 1B 2C 2C ICs Transistors Filters Diodes Resistors Resistors Resistors Capacitors Capacitors Capacitors Coils HA-W500RF (EG)/(EK)

36、(No.70270) 7 RX:IC3 LM4809 1 2 3 45 6 7 8Output 1 Input 1 Bypass GND Vcc Output 2 Input 2 Shutdown RX:IC4 NJM2903M LM393 1 2 3 45 6 7 8Output 1 -Input 1 +Input 1 GND Vcc Output 2 -Input 2 +Input 2 RX:IC2 CXA1538M 5.Wiring Diagram 6.Block View Inside IC Ni-Cd Battery Black lead Red lead Speaker (Lch)

37、 Red lead Blue lead Black lead Inside of the head band assy Inside of the housing (R) Antenna Inside of the head band assy Natural shielded lead Green shielded lead Green shielded lead Red shielded lead Natural shielded lead Natural shielded lead Speaker (Rch) Inside of the housing (L) 1 2 3 4 5 6 7

38、 8 9 10 11 12 13 14 15 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 PLL LPF1 PILOT DET LPF2 PILOT DET LPF2 ST IND/VCO CHECK Rch OUT Lch OUT Vcc RIPPLE FILTER AGC AFC 1 AGC AFC 2 GND TUNE IND FM IF IN AM IF IN BAND SELECT GND PLL LPF2 MPX REG VCO FM DISCRI MUTE AM OSC AFC FM OSC REG FM RF AM RF IN FM

39、 RF IN FE GND FM/AM FE OUT HA-W500RF (EG)/(EK) 8 (No.70270) 7.Block Diagram 8.Electric Parts List AItem No.Parts No. Parts NameDescription J22121-001 Transmitter Unit AItem No.Parts No.Parts NameDescription A J22133-001Main P.C.B AssyAdjusted J22134-001Charge P.C.B Assy D2 J47138-001LEDPower and cha

40、rge Indicator VR1 J47139-001Variable ResistorVolume control, 100 k X 2 VR2J47140-001Variable ResistorTuning control, 100 k X 1 A SW1J47145-001Power SwitchSlide A JK1J47141-001Charge Jack In case of some problem arise in this transmitter unit, have to change the transmitter unit itself, due to avoid

41、the law of radio regulation. Parts marked (A ) ave safety parts. When replacing, be sure to use the specified one. Parts marked (A ) are safety parts. When replacing, be sure to use the specified one. Receiver (Headphones) Transmitter Receiver (Headphones) ANT FILTER UHF MODULE ANT IF VB VT 18 FM ST

42、EREO RADIO IC2:CXA1538M RF IN OSCRF Rch AF OUT Lch AF OUT DISCRIFE OUTIF INVcc 26 1613 HEADPHONE AMP IC3:LM4809 1 7 Rch OUT Lch OUT 4 2220 TUNING VR2 8 2 6 POWER INDICATOR LED RED Ni-Cd Battery (1.2V) x 2 POWER SW1 CHARGE INDICATOR LED GREEN COMPARATOR IC4:LM393 NJM2903 CHARGE INPUT ON OFF ON OFF -

43、5 6 7 A VOLUME VR1 HA-W500RF (EG)/(EK) (No.70270) 9 R L R 6 8 7 11 5 2 4 8 10 11 10 9 10 10 3 1 Charge P.C.B. Assy Main P.C.B. Assy R 9.Exploded View Receiver(Headphones) AItem No.Parts No.Parts NameQtyDescription 1J34073-001Headband Assy1with connecting wire 2J34074-001Housing(L) Assy1with battery

44、terminal 3J34075-001Housing(R) Assy1 4J34076-001Battery Door1 with protector5J34077-001Driver Unit(L) Assy1 with protector6J34078-001Driver Unit(R) Assy1 7J47146-001Swihch knob1 8J47144-001Ear Pad2 9J46514-001Rechargeable Ni-Cd batteries1 10QYSPSPU1411MScrew8 11QYSPSFT1403MScrew4 Receiver(Headphones

45、) 10.Mechanical Parts List Parts marked (A ) are safety parts. When replacing, be sur e to use the specifide one. 2pcs/pack HA-W500RF (EG)/(EK) 10 (No.70270) 1 8 9 5 3 6 710 12 11 2 4 AItem No.Parts No.Parts NameQtyDescription 1J22110-001Packing case1for (EG) model 1J22110-002Packing case1for (EK) m

46、odel 2J22135-001Packing Holder1 3J47142-001Sub Packing Holder1 4QPA01202005Poly Bag1for transmitter 5QPA01506005Poly Bag1for receiver(headphones) 6QPA00500805Poly Bag1for connection cord 7QPA01202005Poly Bag1for AC Adaptor 12.Packing Materials Parts List AItem No.Parts No.Parts NameQtyDescription A8

47、J5500-114AInstructions1for (EG) model A8J5500-115AInstructions1for (EK) model 9BT-54008-4European Guarantee Certificate1 A10J47126-001AC Adaptor1for (EG) model A10J47127-001AC Adaptor1for (EK) model 11J47143-001Connection cord1 12J46517-001Plug adaptor1 13.Accessories List Parts marked (A ) are safe

48、ty parts. When replacing, be sure to use the specifide one. 11.Packing Method Parts marked (A ) are safety parts. When replacing, be sure to use the specifide one. HA-W500RF (EG)/(EK) (No.70270) 11 No.70270 HA-W500RF (EG)/(EK) Printed in Japan 200209 VICTOR COMPANY OF JAPAN, LIMITED COMMUNICATION NETWORK BUSINESS UNIT AV & MULTIMEDIA COMPANY 1644, Shimotsuruma, Yamato, Kanagawa 242-8514, Japan