Pioneer-SCLX81-avr-sm电路图 维修手册.pdf

《Pioneer-SCLX81-avr-sm电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Pioneer-SCLX81-avr-sm电路图 维修手册.pdf（223页珍藏版）》请在收音机爱好者资料库上搜索。

1、ORDER NO. PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, 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 Road, #04-01,

2、 Singapore 159936 PIONEER CORPORATION2008 2008 Printed in Japan SC-LX81 RRV3841 AUDIO/VIDEO MULTI-CHANNEL RECEIVER SC-LX81 SC-LX71 THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S). ModelTypePower RequirementRemarks SC-LX81HYSXJ5AC 220 V to 230 V SC-LX71HYSXJ5AC 220 V to 230 V For deta

3、ils, refer to Important Check Points for good servicing. T-ZZV AUG. RadioFans.CN 收音机爱 好者资料库 2SC-LX81 1234 A B C D E F 1234 Important Check Points for Good Servicing In this manual, procedures that must be performed during repairs are marked with the below symbol. Please be sure to confirm and follow

4、 these procedures. 1. Product safety Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by following the safety instructions described in this manual. 1 Use specified parts for repair. Use genuine parts. Be sure to use importan

5、t parts for safety. 2 Do not perform modifications without proper instructions. Please follow the specified safety methods when modification(addition/change of parts) is required due to interferences such as radio/TV interference and foreign noise. 3 Make sure the soldering of repaired locations is

6、properly performed. When you solder while repairing, please be sure that there are no cold solder and other debris. Soldering should be finished with the proper quantity. (Refer to the example) 4 Make sure the screws are tightly fastened. Please be sure that all screws are fastened, and that there a

7、re no loose screws. 5 Make sure each connectors are correctly inserted. Please be sure that all connectors are inserted, and that there are no imperfect insertion. 6 Make sure the wiring cables are set to their original state. Please replace the wiring and cables to the original state after repairs.

8、 In addition, be sure that there are no pinched wires, etc. 7 Make sure screws and soldering scraps do not remain inside the product. Please check that neither solder debris nor screws remain inside the product. 8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the p

9、ower cord. Damaged power cords may lead to fire accidents, so please be sure that there are no damages. If you find a damaged power cord, please exchange it with a suitable one. 9 There should be no spark traces or similar marks on the power plug. When spark traces or similar marks are found on the

10、power supply plug, please check the connection and advise on secure connections and suitable usage. Please exchange the power cord if necessary. a Safe environment should be secured during servicing. When you perform repairs, please pay attention to static electricity, furniture, household articles,

11、 etc. in order to prevent injuries. Please pay attention to your surroundings and repair safely. 2. Adjustments To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification. Adjustments should be performed in accordance with the proce

12、dures/instructions described in this manual. 4. Cleaning For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper cleaning should be performed to restore their performances. 3. Lubricants, Glues, and Replacement parts Use greas

13、e and adhesives that are equal to the specified substance. Make sure the proper amount is applied. 5. Shipping mode and Shipping screws To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be installed before shipment. Please be s

14、ure to follow this method especially if it is specified in this manual. RadioFans.CN 收音机爱 好者资料库 3SC-LX81 5678 5678 A B C D E F CONTENTS 1. SERVICE PRECAUTIONS.5 1.1 NOTES ON SOLDERING.5 1.2 NOTES ON REPLACING PARTS.5 1.3 NOTES ON ASSEMBLING.6 2. SPECIFICATIONS.8 2.1 ACCESSORIES.8 2.2 SPECIFICATIONS.

15、9 2.3 PANEL FACILITIES.10 3. BASIC ITEMS FOR SERVICE .16 3.1 CHECK POINTS AFTER SERVICING .16 3.2 PCB LOCATIONS.17 3.3 JIGS LIST.19 4. BLOCK DIAGRAM .20 4.1 OVERALL WIRING DIAGRAM .20 4.2 AUDIO BLOCK DIAGRAM.22 4.3 DSP BLOCK DIAGRAM.24 4.4 HDMI NETWORK BLOCK DIAGRAM .25 4.5 MICROCOMPUTER BLOCK DIAGR

16、AM .26 4.6 POWER BLOCK DIAGRAM .28 5. DIAGNOSIS .30 5.1 DIAGNOSIS FLOWCHART .30 5.2 CIRCUIT DESCRIPTION.62 6. SERVICE MODE.70 6.1 TEST MODE.70 7. DISASSEMBLY .75 8. EACH SETTING AND ADJUSTMENT.78 8.1 HOW TO UPDATE FIRMWARE.78 9. EXPLODED VIEWS AND PARTS LIST.84 9.1 PACKING SECTION.84 9.2 EXTERIOR SE

17、CTION .86 9.3 CHASSIS SECTION.88 9.4 REAR PANEL SECTION .90 9.5 FRONT PANEL SECTION.92 10. SCHEMATIC DIAGRAM.94 10.1 AUDIO ASSY.94 10.2 D-MOTHER ASSY (1/4).96 10.3 D-MOTHER ASSY (2/4).98 10.4 D-MOTHER ASSY (3/4).100 10.5 D-MOTHER ASSY (4/4).102 10.6 FRONT IN and V-BRIDGE ASSYS.104 10.7 232C 5,956,67

18、4; 5,974,380; 5,978,762; 6,226,616; 6,487,535 lights when the component is connected. 4 Remote sensor Receives the signals from the remote control. 5 Character display 1 Front Panel 6 MASTER VOLUME dial 7 Front panel controls To access the front panel controls, push gently on the lower third portion

19、 of the panel with your finger. 8 AUDIO PARAMETER Use to access the Audio options. 9 VIDEO PARAMETER Use to access the Video options. 10 / / / (TUNE/ST) /ENTER Use the arrow buttons when setting up your HOME MENU. Use TUNE / to find radio frequencies and use ST / to find preset stations. 11 TUNER ED

20、IT Use with / / / /ENTER to memorize and name stations for recall. 11SC-LX81 5678 5678 A B C D E F 12 BAND Switches between AM and FM radio bands. 13 Listening mode buttons AUTO SURR/STREAM DIRECT Press to select Auto Surround or Stream Direct listening. HOME THX Press to select a Home THX listening

21、 mode. STANDARD SURROUND Press for Standard decoding and to switch between the various Pro Logic IIx and Neo:6 options. ADVANCED SURROUND Use to switch between the various surround modes. STEREO/A.L.C. Switches between stereo playback, Auto level control stereo mode and Front Stage Surround Advance

22、modes. 14 MULTI-ZONE the switching frequency varies by the connected load, signal level and the energizing time) is always output. It is the switching waveform (64V square wave) in the output stage that has been attenuated through LPF. If such remained waveform can be observed, it can be assumed tha

23、t the amplifier is operating normally. When a signal is input to the amplifier, the output signal of the speaker shows the waveform such that the remained switching waveform is superimposed onto the audio signal. Note that when the input signal level is extremely small, it may not be easy to confirm

24、 the audio element since it is buried in the remained switching waveform (approximately 2Vrms). When no sound is produced with a specific function or sound mode, it is not caused by a failure in the power amplifier block. When there is a failure in the power amplifier block, no sound is produced wit

25、h every function. It is recommended to set the speaker setting to LARGE for all the channels and the function to MULTI CH IN when examining the power amplifier. Amplifier Diagnosis with Current Applied (1) No Yes Is the energization state maintained? If the protection circuit shuts it down immediate

26、ly, perform Amplifier Diagnosis without Current Applied. No Yes Check the path (cables and connectors) of AMUTE and SBMUTE. Check again whether the audio signal is not output in the speaker output even if the input signal level is increased. Confirm that the input signal comes to CN6800, the input c

27、onnector of ICE BUFFER Assy. Perform Amplifier Diagnosis with Current Applied (2) No YesYes Does the speaker output shows the remained switching waveform? (Sinusoidal wave of about 430k - 480kHz, 2Vrms) No Is the speaker relay on? (Confirm the relay operation noise using the SPEAKER button within th

28、e front door) Check the relay power supply 12V (pins 5 and 6 of CN4903), relay control signal (pins 9 - 12 of CN4000) and the path (cables and connectors). No Yes Yes No Check the 12V path (such as connectors). Does the input signal come to the input of ICEPOWER AMP Assy? (Ex. the pin 6 (FLch) of CN

29、3820 and the pin 1 (Cch) of CN3810 of ICE INTERFACE Assy) Is the ICE BUFFER Assy OPAMP power 12V supplied? (CN6810 and CN6820 of ICE BUFFER Assy, power is supplied separately to each channel. (Ex. Pin 7 (-12V) and pin8 (+12V) of CN6820 for FLch) Is the MUTE disabled? (Are the pins 5 and 6 of CN4000

30、of ICEPOWER AMP Assy set to H?) 60SC-LX81 1234 A B C D E F 1234 Amplifier Diagnosis with Current Applied (2) No Yes Is the modulator IC power 5V supplied? (Pins 1 and 3 of CN4902) When the remained switching waveform is not observed in the speaker output, the amplifier is not operating. Here, confirm that the power and signal necessary for the amplifier to operate are supplied. Check the path (cables and connectors) of 5V. No Yes Is there disable control signal? (Are pins 1 - 4 of CN4000 set to H?) Check the path (cables and connect