Crownma600sm电路图.pdf

《Crownma600sm电路图.pdf》由会员分享，可在线阅读，更多相关《Crownma600sm电路图.pdf（49页珍藏版）》请在收音机爱好者资料库上搜索。

1、Macro-Tech 600 Amplifier Service Manual 1 MACRO-TECH -600 POWER AMPLIFIER SERVICE MANUAL K-SVCMA6 2-96 Macro-Tech, ODEP and Crown are registered trademarks of Crown International, Inc. Mailing Address: P.O. Box 1000 Elkhart, IN U.S.A. 46515-1000 Shipping Address: 57620 C.R. 105 Elkhart, IN U.S.A. 46

2、517 1996 by CROWN INTERNATIONAL, INC. RadioFans.CN 收音机爱 好者资料库 Macro-Tech 600 Amplifier Service Manual 2 PRVENIR LE CHOC LECTRIQUE NENLEVEZ PAS LES COUVERTURES. RIEN DES PARTIES UTILES LINTRIEUR. DBRANCHER LA BORNE AVANT DOUVRIR LA MODULE EN ARRIRE. TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR BOTT

3、OM COVERS. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. DISCONNECT POWER CORD BEFORE REMOVING REAR INPUT MODULE TO ACCESS GAIN SWITCH. CAUTIONAVIS WARNING TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE! The information furn

4、ished in this manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise during installation, operation or maintenance. If you need special assistance beyond the scope of this manual, please contact the

5、 Crown Technical Support Group. Mail: P.O. Box 1000 Elkhart IN 46515-1000 Shipping: 57620 C.R. 105 Elkhart IN 46517 Phone: (800) 342-6939/(219) 294-8200 FAX: (219) 294-8301 RadioFans.CN 收音机爱 好者资料库 Macro-Tech 600 Amplifier Service Manual 3 Table of Contents Introduction .4 Parts Information .5 Specif

6、ications.6 Voltage Conversion .7 Circuit Theory .8 Electrical Checkout Procedures.13 Parts List (Non-Module) .17 Module and Schematic Information .20 Fuse Module Parts List.21 Q42553A8 Display Module Parts List .22 Q42855-9 Display Module Parts List.23 Q43433-4 Display Module Parts List.24 Q42647-0

7、Output Module Parts List .25 Q42717-1 Output Module Parts List .26 Q42871-6 Output Module Parts List .27 Q42968-0 Output Module Parts List .28 Q43202-3 Output Module Parts List .29 Q42666-0 Main Module Parts List.30 Q42735-3 Main Module Parts List.32 Q42755-1 Main Module Parts List.35 Q42776-7 Main

8、Module Parts List.38 Q42984-7 Main Module Parts List.41 Q43039-9 Main Module Parts List.44 Q43032-4 Main Module Parts List.47 RadioFans.CN 收音机爱 好者资料库 Macro-Tech 600 Amplifier Service Manual 4 Crown Technical Support Group Factory Service Parts Department Mailing Address: PO Box 1000 Elkhart, IN USA

9、46515-1000 Shipping Address: 57620 C.R. 105 Elkhart, IN USA 46517 Phone: (219) 294-8200 Toll Free: (800) 342-6939 FAX: (219) 294-8301 This manual contains service information on Crown power amplifiers. It is designed to be used in conjunc- tion with the applicable Owners Manual. However, some import

10、ant information is duplicated in this Ser- vice Manual in case the Owners Manual is not readily available. NOTE: THE INFORMATION IN THIS MANUAL IS INTENDED FOR USE BY AN EXPERIENCED TECHNICIAN ONLY! Scope This Service Manual in intended to apply to all versions of the MA-600 amplifier including the

11、Amcron MA-601. The Parts Listings include parts specific for the US version and the European version (MA-600E13). For parts specific only to other versions contact the Crown Technical Support Group for help in finding part numbers. This Service Manual includes several sections. These sections includ

12、e Parts Information, Specifications, Voltage Conversion, Circuit Theory, Electrical Test Procedures, Non-Module Parts Lists, and Module Parts Lists. Schematics are attached. Note that com- ponent parts with circuit board comprise a complete module. Module part numbers are always associated with a sp

13、ecific circuit board, although an unpopulated circuit board may be built up with different parts to create different modules. Note that Crown does not sell blank (unpopulated) circuit boards. Each of the compact audio power amplifiers are designed for professional or commercial use. Provid- ing high

14、 power amplification from 20Hz to 20KHz with minimum distortion, they feature balanced inputs with bridged and parallel monophonic capability. Specific features vary depending on model family. Warranty Each Owners Manual contains basic policies as re- lated to the customer. In addition it should be

15、stated that this service documentation is meant to be used only by properly trained service personnel. Because most Crown products carry a 3 Year Full Warranty (including round trip shipping within the United States), all warranty service should be referred to the Crown Factory or Authorized Warrant

16、y Service Center. See the applicable Owners Manual for warranty details. To find the location of the nearest Authorized Service Center or obtain instructions for receiving Crown Fac- tory Service please contact the Crown Technical Sup- port Group (within North America) or your Crown/ Amcron Importer

17、 (outside North America). Introduction Macro-Tech 600 Amplifier Service Manual 5 Parts Information shipment on a C.O.D. or pre-payment (check or credit card) basis. Terms Normal terms are pre-paid. Net-30 Days applies to only those firms having pre-established accounts with Crown. If pre-paying, the

18、 order must be packed and weighed before a total bill can be established, after which an amount due will be issued and shipment made upon receipt of pre-payment. New parts re- turned for credit are subject to a 10% re-stocking fee, and authorization from the Crown Parts Department must be obtained b

19、efore returning parts for credit. Crown is not a general parts warehouse. Parts sold by the Crown Parts Department are solely for servicing Crown/Amcron products. Part prices and availabil- ity are subject to change without notice. General Information Later sections include both mechanical and elect

20、rical parts lists for this product. The parts listed are current as of the date printed. Crown reserves the right to modify and improve its products for the benefit of its customers. Part Numbering Systems As of the printing of this manual, Crown is using two numbering systems. The elder system alwa

21、ys uses eight characters. The first character is a letter. Com- mon letters used are C, D, H, M, P, and Q. The second through sixth characters are numbers. The numbers build sequentially (for each prefix letter) as new parts are added to our parts inventory system. (In some cases there will be a spa

22、ce then a four character number after the prefix letter; the space is considered a character.) The seventh character is usually a hy- phen, though it may be a letter to indicate a revision or special note. The last character is called a check-digit, and is useful to Crown for internal tracking. Crow

23、n is in the process of converting to a new part number system. Length may vary from eight to twelve characters. There is still a letter prefix, then five numbers. These five numbers identify a type of part. The seventh character is a hyphen. Remaining char- acters identify the details of the type of

24、 part identified by the first part of the number. Standard and Special Parts Many smaller electrical and electronic parts used by Crown are stocked by and available from electronic supply houses. However, some electronic parts that appear to be standard are actually special. A part ordered from Crow

25、n will assure an acceptable re- placement. Structural items such as modules and panels are available from Crown only. Ordering Parts When ordering parts, be sure to give the product model, and include a description and part number (CPN/DPN) from the parts listing. Price quotes are available on reque

26、st. Shipment Shipment will be normally made by UPS or best other method unless you specify otherwise. Shipments are made to and from Elkhart, Indiana USA, only. Estab- lished accounts with Crown will receive shipment freight prepaid and will be billed. All others will receive Crown Parts Department

27、Mailing Address: PO Box 1000 Elkhart, IN USA 46515-1000 Shipping Address: 57620 C.R. 105 Elkhart, IN USA 46517 Phone: (219) 294-8210 or: (219) 294-8211 Toll Free: (800) 342-6939 FAX: (219) 294-8301 Macro-Tech 600 Amplifier Service Manual 6 Specifications Unless noted otherwise, all specifications ar

28、e based on driving an 8 ohm load per channel, both channels driven, the sensitivity switch in the 26dB position, the AC supply is 120VAC at 60Hz. Crown specifications are guaranteed through the warranty period (normally 3 years). Because our testing methods are more strin- gent than our published sp

29、ecifications, every Crown amplifier will exceed its published specifications. POWER Power 8 Ohm Stereo220W/Ch 4 Ohm Stereo325W/Ch 2 Ohm Stereo400W/Ch 8 Ohm Bridge Mono655W 4 Ohm Bridge Mono750W 2 Ohm Parallel Mono665W 1 Ohm Parallel Mono700W Load Impedances: Rated for 16, 8, 4, 2, and 1 (parallel mo

30、no only) Ohm operation; safe with all types of loads, even totally reactive loads. AC Mains: 120VAC at 60 Hz with standard three-wire grounded connector for North American units; 100VAC, 120VAC, 220VAC, and 240VAC at 50 or 60 Hz when equipped with universal transformers, applicable fan assembly, and

31、 other applicable hardware with coun- try specific power cord. PERFORMANCE Frequency Response: 0.1dB from 20 Hz to 20 kHz at 1 Watt. Phase Response: 10 from 10 Hz to 20 kHz at 1 Watt. Signal to Noise Ratio: A-weighted, better than 105 dB below full rated output. Better than 100 dB below full rated o

32、utput from 20 Hz to 20 kHz. Total Harmonic Distortion (THD): 0.05% from 20 Hz to 1 kHz, increasing linearly to 0.1% at 20 kHz at 500W. I.M. Distortion: 13V per microsecond. (Slew rates are limited to useful levels for ultrasonic/RF protection.) Damping Factor: 1000 from 10 Hz to 400 Hz. DC Offset: 1

33、0 millivolts. Input Impedance: Nominally 20K ohms balanced; 10K ohms unbalanced. Output Impedance: 10 milliohms in series with = 235W at 0.1% THD. Spec at 4 Ohm Stereo: = 340W at 0.1% THD. Spec at 2 Ohm Stereo: = 410W at 0.1% THD. International 8 Ohm Stereo: =220W at 0.1% THD. International 4 Ohm St

34、ereo: =275W at 0.1% THD. International 2 Ohm Stereo: =300W at 0.1% THD. Initial Conditions: Controls per standard. Procedure: Load each channel to 8 ohms. Inject a 1 kHz sine wave and measure at least 43.36 VAC at the output of each channel. Load each channel to 4 ohms. Inject a 1 kHz sine wave and

35、measure at least 36.88 VAC. Load each channel to 2 ohms. Inject a 1 kHz sine wave and measure at least 28.64 VAC. All power measurements must be at less than 0.1% THD. Test 13: Reactive Loads Spec: No oscillations. Safe with all types of loads. Initial Conditions: Controls per standard. Procedure Ca

36、pacitive: Load each channel to 8 ohms in parallel with 2 F. Inject a 20 kHz sine wave with 33 VAC output for 10 seconds. Procedure Inductive: Load each channel to 8 ohms in parallel with 159 Henries. Inject a 1 kHz sine wave with 15 VAC output for 10 seconds. Test 6: Voltage Gain Spec 26dB Gain: Gai

37、n of 20.0 3%. Spec 0.775V Sensitivity: 6%. Spec 1.4V Sensitivity: +12%/6%. Initial Conditions: Controls per standard. Procedure: No load connected. Inject a 0.775 VAC 1 kHz sine wave with the Sensitivity Switch in the 26 dB position. Measure 15.5 VAC 0.5 VAC at the amplifier output. Inject a 0.775 V

38、AC 1 kHz sine wave with the Sensitivity Switch in the 0.775V position. Measure 43.4 VAC 2.6 VAC at the amplifier output. Inject a 1.4 VAC 1 kHz sine wave with the Sensitivity Switch in the 1.4V position. Measure 43.4 VAC +5.2/5.6 VAC at the amplifier output. Return the Sensitivity Switch to the 26 d

39、B position. Test 7: Phase Response Spec: 10 from 10 Hz to 20 kHz at 1 Watt. Initial Conditions: Controls per standard, 8 ohm load on each channel. Procedure: Inject a 1 kHz sine wave and adjust for 1 Watt output (2.8 VAC). Check input and output signals against each other, input and output signals m

40、ust be within 10 of each other. Test 8: Level Controls Spec: Level controlled by level controls. Initial Conditions: Controls per standard. Procedure: No Load. Inject a 1 kHz sine wave. With level controls fully clockwise you should see full gain. As controls are rotated counterclockwise, observe si

41、milar gain reduction in each channel. When com- plete, return level controls to fully clockwise position. Test 9: Current Limit Spec: Current Limit at 20 Amps, 2 Amps Initial Conditions: Controls per standard. Procedure: Load each channel to 1 Ohm. Inject a 1 kHz differentiated (or 10% duty cycle) s

42、quare wave. See figure 4. Increase output level until current limit oc- curs. Current limit should occur at 20 2 Amps (20 Vpk). Observe clean (no oscillations) current clipping. InOut .047 uF 1K Ohm Figure 4. Differentiator Circuit Macro-Tech 600 Amplifier Service Manual 15 Electrical Checkout Proce

43、dures Procedure Torture: Load each channel with the primary (red and black leads) of a DC-300A transformer (D 5781-6). Inject a 15 Hz sine wave at sufficient output level to cause 3 to 5 flyback pulses, for 10 seconds. Procedure Short: Inject a 60 Hz sine wave at 15 VAC output. After establishing si

44、gnal, short the output for 10 seconds. Test 14: ODEP Limiting Spec: No oscillation on ODEP Limiting wave form; either channel controls limiting in Parallel Mono Mode. Initial Conditions: Controls per standard; rag or other obstruction blocking fan so that it does not turn. Procedure: Load the amplif

45、ier to 2 ohms on each channel. Inject a 60 Hz sine wave and adjust for 15 Vrms at the output. After a few minutes observe a wave form similar to Figure 5. Remove the input signal from both channels and allow the amplifier to cool for a few minutes. Switch the amplifier to Parallel Mono and remove th

46、e load from Channel 1. Inject the signal into Channel 1 and observe that ODEP limiting occurs at the output of both channels. Remove the load from Channel 2, and install the load on Channel 1. Again, observe that both channels limit. Return all amplifier controls to standard initial conditions. Remo

47、ve the fan obstruction. Test 15: LF Protection Spec: Amplifier mutes for low frequency. Initial Conditions: Controls per standard. Procedure: No load. Inject a 0.5 Hz 6 volt peak-to-peak square wave, or a 2 Hz 6VAC sine wave into each channel and verify that each channel cycles into mute. Test 16: Signal to Noise Ratio Spec: 100 dB below rated 8 ohm power 20 Hz to 20 kHz. 105 dB A-Weighted. Initial Conditions: Controls per standard. Short inputs. Procedur