Alesis_HR-16_Drum_Service_Manual电路图.pdf

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1、HR-16/HR16B Service Manual 1.00 i 03/31/06 HR-16/HR-16B Drum Machines Service Manual V1.00 7/27/95 RadioFans.CN 收音机爱 好者资料库 HR-16/HR16B Service Manual 1.00 ii 03/31/06 PREFACE This document is intended to assist the service technician in the operation, maintenance and repair of the HR- 16 and HR-16B

2、Drum Machines. Together with the HR-16/B Reference Manual, this document provides a complete description of the functionality and serviceability of these machines. Any comments or suggestions you may have pertaining to the document are welcome and encouraged. READ THIS! In addition to any purchase p

3、rice that Alesis may charge as consideration for Alesis selling or otherwise transferring this service manual (“Manual”) to you, if you are not a service and repair facility (“Service Center”) authorized by Alesis in writing to be an authorized Service Center, Alesis sells or transfers the Manual to

4、 you on the following terms and conditions: Only Service Centers authorized by Alesis in writing are authorized to perform service and repairs covered by an Alesis warranty (if any), and transfer of the Manual to you does not authorize you to be an authorized Service Center. Therefore, if you perfor

5、m, or if the Manual is used to perform, any service or repairs on any Alesis product or part thereof, any and all warranties of Alesis as to that product and any service contract with Alesis for that product shall be voided and shall no longer apply for such product, even if your services or repairs

6、 were done in accordance with the Manual. All service or repairs done by you or with reference to the Manual shall be solely your responsibility, and Alesis shall have no liability for any such repairs or service work. All such service or repairs are performed at the sole risk of the person performi

7、ng the service or repairs. You agree that all such work will be performed in a competent, professional and safe manner at all times and to indemnify and fully hold Alesis and its successors and assigns harmless in the event of any failure to so perform. Your purchase of the Manual shall be for your

8、own ultimate use and shall not be for purposes of resale or other transfer. As the owner of the copyright to the Manual, Alesis does not give you the right to copy the Manual, and you agree not to copy the Manual without the written authorization of Alesis. Alesis has no obligation to provide to you

9、 any correction of, or supplement to, the Manual, or any new or superseding version thereof. Alesis shall have the right to refuse to sell or otherwise transfer repair parts or materials to you in its sole discretion. You shall not use, sell or otherwise transfer spare or replacement parts supplied

10、by Alesis to you (i) to repair or be used in products manufactured for or by third parties or (ii) to any third parties for any purpose. You shall not make any warranties or guarantees with respect to the products of Alesis or the use thereof on behalf of Alesis or in your own name. The foregoing de

11、scribes the entire understanding related to sale or transfer of the Manual to you, and no other terms shall apply unless in a writing signed by an authorized representative of Alesis. RadioFans.CN 收音机爱 好者资料库 HR-16/HR16B Service Manual 1.00 iii 03/31/06 WARNINGS TO REDUCE THE RISK OF ELECTRIC SHOCK O

12、R FIRE, DO NOT EXPOSE THIS PRODUCT TO WATER OR MOISTURE. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN The arrowhead symbol on a lightning flash inside a triangle is intended to alert the user to the presence of un-insulated dangerous voltage within the enclosed product which may be of sufficient magni

13、tude to constitute a risk of electric shock to persons. The exclamation point inside a triangle is intended to alert the user to the presence of important operating, maintenance and servicing instructions in the literature which accompanies the product. CAUTION Danger of explosion if battery is inco

14、rrectly replaced. Replace only with the same type or equivalent type recommended by the equipment manufacturer. Battery Manufacturer: Tadiran Type: TL-5101 Rating 3.6V REPAIR BY ANY PERSON OR ENTITY OTHER THAN AN AUTHORIZED ALESIS SERVICE CENTER WILL VOID THE ALESIS WARRANTY. PROVISION OF THIS MANUA

15、L DOES NOT AUTHORIZE THE RECIPIENT TO COMPETE WITH ANY ALESIS DISTRIBUTOR OR AUTHORIZED REPAIR SERVICE CENTER IN THE PROVISION OF REPAIR SERVICES OR TO BE OR MAKE REPAIRS AS AN AUTHORIZED SERVICE CENTER. ALL REPAIRS DONE BY ANY ENTITY OTHER THAN AN AUTHORIZED ALESIS SERVICE CENTER SHALL BE SOLELY TH

16、E RESPONSIBILITY OF THAT ENTITY, AND ALESIS SHALL HAVE NO LIABILITY TO THAT ENTITY OR TO ANY OTHER PARTY FOR ANY REPAIRS BY THAT ENTITY. RadioFans.CN 收音机爱 好者资料库 HR-16/HR16B Service Manual 1.00 iv 03/31/06 SAFETY SUGGESTIONS Carefully read the applicable items of the operating instructions and these

17、safety suggestions before using this product. Use extra care to follow the warnings written on the product itself and in the operating instructions. Keep the operating instructions and safety suggestions for reference in the future. 1. Power Source. The product should only be connected to a power su

18、pply which is described either in the operating instructions or in markings on the product. 2. Power Cord Protection. AC power supply cords should be placed such that no one is likely to step on the cords and such that nothing will be placed on or against them. 3. Grounding the Plug. This product ha

19、s a 3-wire grounding type of plug (a plug with a grounding pin) for safety purposes. This plug can only be used in a grounding power outlet. If the plug does not insert into the outlet you are using, the outlet probably is not a grounding type of power outlet. Contact your electrician to replace the

20、 obsolete outlet with a grounding type of outlet instead of defeating the safety feature of the grounding type of plug. 4. Periods of Non-use. If the product is not used for any significant period of time, the products AC power supply cord should be unplugged from the AC outlet. 5. Foreign Objects a

21、nd Liquids. Take care not to allow liquids to spill or objects to fall into any openings of the product. 6. Water or Moisture. The product should not be used near any water or in moisture. 7. Heat. Do not place the product near heat sources such as stoves, heat registers, radiators or other heat pro

22、ducing equipment. 8. Ventilation. When installing the product, make sure that the product has adequate ventilation. Improperly ventilating the product may cause overheating, which may damage the product. 9. Mounting. The product should only be used with a rack which the manufacturer recommends. The

23、combination of the product and rack should be moved carefully. Quick movements, excessive force or uneven surfaces may overturn the combination which may damage the product and rack combination. 10. Cleaning. The product should only be cleaned as the manufacturer recommends. 11. Service. The user sh

24、ould only attempt the limited service or upkeep specifically described in the operating instructions for the user. For any other service required, the product should be taken to an authorized service center as described in the operating instructions. 12. Damage to the Product. Qualified service pers

25、onnel should service the unit in certain situations including without limitation when: a. Liquid has spilled or objects have fallen into the product, b. The product is exposed to water or excessive moisture, c. The AC power supply plug or cord is damaged, d. The product shows an inappropriate change

26、 in performance or does not operate normally, or e. The enclosure of the product has been damaged. HR-16/HR16B Service Manual 1.00 v 03/31/06 General Troubleshooting While this manual assumes that the reader has a fundamental understanding of electronics and basic troubleshooting techniques, a revie

27、w of some of the techniques used by our staff may help. 1. Visual Inspection - A short visual inspection of the unit under test will often yield results without the need of complex signal analysis (burnt, or loose components are a dead giveaway). 2. Self Test - Alesis products that utilize microproc

28、essor control contain built in test software which exercises many of the units primary circuit functions. Self test should always be done following any repair to ensure basic functionality. 3. Environmental Testing - Applying heat and cold (heat gun/freeze spray) will often reveal thermally intermit

29、tent components (Clock crystals, I.C.s, and capacitors are particularly prone to this type of failure). 4. Burn in Testing - Leaving a unit running overnight often reveals intermittent failures such as capacitors that begin to leak excess current after a significant amount of time. 5. Cable Checks -

30、 Wiggling cables can reveal intermittent failures such as loose cables or poorly soldered headers. Remember to check power supply cables as well. 6. Flexing the PC Board - Poor solder joints and broken traces can often be found by pressing the PC Board in various places. 7. Tapping Componants - Somt

31、imes tapping on a component (particularly crystals) will cause it to fail. 8. Power Down/up - Turning the unit off and back on rapidly several times may reveal odd reset and/or power supply failures. 9. Reset Threshold - A Variac (variable transformer) can be used to check reset threshold levels. Th

32、is can be particularly useful in helping customers with low line problems. 10. Compressors - Using a compressor/limiter is often helpful when attempting to solve low level noise problems, as well as assisting with DAC adjustments. 11. Sweep Tests - Sweep generators are very useful in checking the fr

33、equency response envelopes of anti- aliasing filters. 12. Piggybacking - Piggybacking I.C.s is particularly useful when troubleshooting large sections of logic. This is especially true when working with older units. HR-16/HR16B Service Manual 1.00 vi 03/31/06 TABLE OF CONTENTS PREFACE.ii READ THIS!

34、.ii WARNINGS.iii SAFETY SUGGESTIONS.iv General Troubleshooting.v 1.0 General Description .1 1.1 Main PC Board Revisions .1 2.0 Power Supply.1 2.1 Battery Backup.2 2.2 PUP Circuit.2 3.0 The 8031 .3 3.1 Reset.3 3.2 Memory Mapped I/O.4 3.3 Keypad I/O.4 3.4 MIDI I/O .4 4.0 DM3AG ASIC .5 4.1 Mask ROMs.5

35、5.0 Analog Signal Paths.6 5.1 Drum Signal Output.6 5.2 Piezo/Data Slider Input.6 5.3 Tape I/O.6 5.4 Tape Output.7 5.5 Tape Input .7 6.0 Test Procedures.7 6.1 General Testing.8 6.2 Internal Diagnostics and Hidden Keys.8 6.3 DAC Adjustments.8 7.0 Updates and Corrections .9 7.1 New SRAM Supply Circuit.

36、9 7.2 Glass Zener (D15).9 7.3 Dirty Cliff jacks.10 7.4 Ground CE.10 7.5 RF resistor.10 7.6 10K MIDI Resistor (R5).11 7.7 MIDI Pullup.11 7.8 RF Shields.11 7.9 LCD Contrast Adjustments.11 7.10 DAC Drift .12 7.11 Old Keypad PC Boards.12 7.12 Lifting R41 .12 7.13 Reset Capacitor.12 7.14 Sram Capacitor .

37、12 7.15 Tape Capacitors.13 7.16 RF chokes .13 7.17 AQ reset threshold .13 7.18 AQ R116.13 7.19 Volume Slider Wiring.13 7.20 PUP Capacitor.14 8.0 Common Solutions.15 9.0 Service Parts List .18 10.0 Software History.20 11.0 MIDI Implementation.23 12.0 Service Manual History .31 INDEX.32 HR-16/HR16B Service Manual 1