Pioneer-A20K-int-sm维修电路原理图.pdf

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1、ORDER NO. PIONEER CORPORATION 1-1, Shin-ogura, Saiwai-ku, Kawasaki-shi, Kanagawa 212-0031, Japan PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A. PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra

2、Road, #04-01, Singapore 159936 PIONEER CORPORATION2012 2012 Printed in Japan A-30-K RRV4297 INTEGRATED AMPLIFIER A-30-K A-30-S A-20-K A-20-S A-20 A-10-K A-10-S THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S). ModelTypePower RequirementRemarks A-30-K/-SPWSYXE8AC 220 V to 230 V A-20-K/

3、-SPWSYXE8AC 220 V to 230 V A-20CUXEAC 120 V A-10-K/-SSYXE8AC 220 V to 230 V K-FZV MAY RadioFans.CN 收音机爱好者资料库 2A-30-K 1234 A B C D E F 1234 SAFETY INFORMATION 1. SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technician. LEAKAGE CU

4、RRENT CHECK Measure leakage current to a known earth ground (water pipe, conduit, etc.) by connecting a leakage current tester such as Simpson Model 229-2 or equivalent between the earth ground and all exposed metal parts of the appliance (input/output terminals, screwheads, metal overlays, control

5、shaft, etc.). Plug the AC line cord of the appliance directly into a 120V AC 60 Hz outlet and turn the AC power switch on. Any current measured must not exceed 0.5 mA. ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED BEFORE RETURN

6、ING THE APPLIANCE TO THE CUSTOMER. 2. PRODUCT SAFETY NOTICE Many electrical and mechanical parts in the appliance have special safety related characteristics. These are often not evident from visual inspection nor the protection afforded by them necessarily can be obtained by using replacement compo

7、nents rated for voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this Service Manual. Electrical components having such features are identified by marking with a on the schematics and on the parts list in this Service Manual. The use of a sub

8、stitute replacement component which does not have the same safety characteristics as the PIONEER recommended replacement one, shown in the parts list in this Service Manual, may create shock, fire, or other hazards. Product Safety is continuously under review and new instructions are issued from tim

9、e to time. For the latest information, always consult the current PIONEER Service Manual. A subscription to, or additional copies of, PIONEER Service Manual may be obtained at a nominal charge from PIONEER. Leakage current tester Reading should not be above 0.5 mA Device under test Test all exposed

10、metal surfaces Also test with plug reversed (Using AC adapter plug as required) Earth ground AC Leakage Test (FOR USA MODEL ONLY) WARNING This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to cause cancer, birth defects or o

11、ther reproductive harm. 56 noi t isoporP - 6.94252 no i t ceS edoC ytefaS it is not meant for the casual do-it- yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. Im

12、properly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician. RadioFa

13、ns.CN 收音机爱好者资料库 3A-30-K 5678 5678 A B C D E F CONTENTS SAFETY INFORMATION.2 1. SERVICE PRECAUTIONS.4 1.1 NOTES ON SOLDERING.4 2. SPECIFICATIONS.5 2.1 ACCESSORIES.5 2.2 SPECIFICATIONS.5 3. BASIC ITEMS FOR SERVICE .6 3.1 CHECK POINTS AFTER SERVICING .6 3.2 PCB LOCATIONS.7 3.3 JIGS LIST.7 4. BLOCK DIA

14、GRAM .8 4.1 OVERALL CONNECTION DIAGRAM.8 4.2 BLOCK DIAGRAM.10 5. DIAGNOSIS .12 5.1 TROUBLESHOOTING.12 5.2 PROTECTION CIRCUIT DESCRIPTION.15 5.3 IC INFORMATION .17 6. SERVICE MODE.21 7. DISASSEMBLY .22 8. EACH SETTING AND ADJUSTMENT.29 8.1 HOW TO CHECK THE FIRMWARE VERSION.29 8.2 FARMWARE UPDATING .2

15、9 8.3 HOW TO ADJUST THE IDLE CURRENT .31 9. EXPLODED VIEWS AND PARTS LIST.32 9.1 PACKING SECTION.32 9.2 EXTERIOR SECTION (A-30/A-20).34 9.3 EXTERIOR SECTION (A-10) .38 10. SCHEMATIC DIAGRAM.40 10.1 MAIN ASSY.40 10.2 FRONT ASSY and SECOND POWER SW ASSY (A-30/A-20).42 10.3 MASTER VOLUME ASSY, TONE ASS

16、Y and HEADPHONE ASSY.44 11. PCB CONNECTION DIAGRAM.46 11.1 MAIN ASSY.46 11.2 FRONT ASSY.50 11.3 MASTER VOLUME ASSY.52 11.4 TONE ASSY .53 11.5 HEADPHONE ASSY and SECOND POWER SW ASSY (A-30/A-20).54 12. PCB PARTS LIST.55 RadioFans.CN 收音机爱好者资料库 4A-30-K 1234 A B C D E F 1234 1. SERVICE PRECAUTIONS 1.1

17、NOTES ON SOLDERING For environmental protection, lead-free solder is used on the printed circuit boards mounted in this unit. Be sure to use lead-free solder and a soldering iron that can meet specifications for use with lead-free solders for repairs accompanied by reworking of soldering. Compared w

18、ith conventional eutectic solders, lead-free solders have higher melting points, by approximately 40 C. Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373 C in general, although the temperature depends on the heat capacity of the PC board on which r

19、eworking is required and the weight of the tip of the soldering iron. Do NOT use a soldering iron whose tip temperature cannot be controlled. Compared with eutectic solders, lead-free solders have higher bond strengths but slower wetting times and higher melting temperatures (hard to melt/easy to ha

20、rden). The following lead-free solders are available as service parts: Parts numbers of lead-free solder: GYP1006 1.0 in dia. GYP1007 0.6 in dia. GYP1008 0.3 in dia. RadioFans.CN 收音机爱好者资料库 5A-30-K 5678 5678 A B C D E F 2. SPECIFICATIONS 2.1 ACCESSORIES 2.2 SPECIFICATIONS Remote control unit (A-30-K

21、/-S : CARTA30) (A-20-K/-S,A-20 : CARTA20) AAA/R03 dry cell battery x 2 (A-30-K/-S, A-20-K/-S, A-20) AC Power cord (A-30-K/-S : CJA2B054Z) (A-20-K/-S, A-10-K/-S : CJA2B020Z) Warranty card (A-30-K/-S, A-20-K/-S, A-10-K/-S : CQE1A541Z) Operating instructions (A-30-K/-S, A-20-K/-S, A-10-K/-S : CQX1A1640

22、Y) (A-20 : CQX1A1644Z) Amplifier section Power output specification is for when power supply is 230 V. (A-30-K/-S, A-20-K/-S, A-10-K/-S) Power output specification is for when power supply is 120 V. (A-20) Continuous power output (both channels driven at 20 Hz to 20 kHz) A-30 . . . . . . . . . . . .

23、 . . . . . . . . . . . . . . . . . . . . .70 W + 70 W A-20, A-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 W + 50 W (THD 0.1 %, 4 ) A-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 W+40 W A-20, A-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

24、 W+30 W (THD 0.05 %, 8 ) Audio section Input (Sensitivity/Impedance) SACD/CD, NETWORK, TUNER, AUX, RECORDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 mV/50 k POWER AMP DIRECT (A-30 only). . . . . . . . . . . . .1 V/10 k PHONO (MM). . . . . . . . . . . . . . . . . . .

25、. . . . . . 2.8 mV/50 k Output (Level/Impedance) RECORDER OUT . . . . . . . . . . . . . . . . . . . . . 200 mV/2.2 k PHONES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 mV/32 Frequency response SACD/CD, NETWORK, TUNER, AUX, RECORDER . . . . . . . . . . . . . . . . . . . . . . . . .

26、. . . . 5 Hz to 100 kHz dB* PHONO (MM). . . . . . . . . . . . . . . .20 Hz to 20 kHz 0.5 dB* * Measured with DIRECT button switched on. Tone control (When VOLUME is set to -30 dB) Bass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 dB (100 Hz) Treble. . . . . . . . . . . . . . . . . .

27、 . . . . . . . . . . . 10 dB (10 kHz) Signal-to-Noise Ratio (IHF SHORTED, A-NETWORK) SACD/CD, NETWORK, TUNER, AUX, RECORDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 dB* PHONO (MM, 2.8 mV input) . . . . . . . . . . . . . . . . . . .77 dB* * Measured with DIR

28、ECT button switched on. Speaker load impedance A, B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 16 A+B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 to 32 Bi-wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 16 Miscellaneous Pow

29、er requirements . . . . . . . . . . . . . . . . . . . . . . . . . . AC 220 V to 230 V, 50 Hz (A-30-K/-S, A-20-K/-S, A-10-K/-S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 120 V, 60 Hz (A-20) Power consumption A-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

30、 . . . . . . . . 175 W A-20/A-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 W In standby . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 W Dimensions . . . . . . . . . . . . . . .435 mm (W) x 128 mm (H) x 360 mm (D) Weight (without package) A-30 . .

31、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.9 kg A-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2 kg A-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.7 kg Note Specifications and the design are subjec

32、t to possible modifications without notice, due to improvements. Corporation and product names mentioned herein are trademarks or registered trademarks of the respective corporations. RadioFans.CN 收音机爱好者资料库 6A-30-K 1234 A B C D E F 1234 3. BASIC ITEMS FOR SERVICE 3.1 CHECK POINTS AFTER SERVICING Item to be checked regarding audio Distortion Noise Volume