Yamaha DD-55 Digital Percussion Service Manual 电路图.pdf
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1、SERVICE MANUAL HAMAMATSU, JAPAN 1.42K-0.935 K Printed in Japan 2001.05 001660SK CONTENTS SPECIFICATIONS . 3 PANEL LAYOUT. 4 DIMENSION. 5 CIRCUIT BOARD LAYOUT. 6 BLOCK DIAGRAM . 7 DISASSEMBLY PROCEDURE . 8 LSI PIN DISCRIPTION. 10 IC BLOCK DIAGRAM.11 CIRCUIT BOARDS .11 TEST PROGRAM . 16 MIDI IMPREMENT
2、ATION CHART . 20 PARTS LIST OVERALL CIRCUIT DIAGRAM This document is printed on chlorine free (ECF) paper with soy ink. PEDAL 1 PEDAL 2 RadioFans.CN 收音机爱 好者资料库 2 DD-55 IMPORTANT NOTICE This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been a
3、ssumed that basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the users, and have therefore not been restated. WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in per
4、sonal injury, destruction of expensive components and failure of the product to perform as specified. For these reasons, we advise all Yamaha product owners that all service required should be performed by an authorized Yamaha Retailer or the appointed service representative. IMPORTANT:This presenta
5、tion or sale of this manual to any individual or firm does not constitute authoriza- tion, certification, recognition of any applicable technical capabilities, or establish a principal- agent relationship of any form. The data provided is believed to be accurate and applicable to the unit(s) indicat
6、ed on the cover. The research engineering, and service departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefor, inevitable and changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exis
7、t, please contact the distributors Service Division. WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect to this bus). IMPORTANT:Turn the unit
8、OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit. WARNING: CHEMICAL CONTENT NOTICE! The solder used in the production of this product contains LEAD. In addition, other electrical / electronic and / or plastic (where applicable) components may also con
9、tain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause cancer and / or birth defects or other reproductive harm. DO NOT PLACE SOLDER, ELECTRICAL / ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT SO EVER! Avoid prolonged, u
10、nprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder / flux vapor! If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food. WARNING Components having special ch
11、aracteristics are marked and must be replaced with parts having specification equal to those originally installed. RadioFans.CN 收音机爱 好者资料库 3 DD-55 SPECIFICATIONS Drum Pads 7 pads (125mm x 4, 88mm x 3), Touch Sensitive Maximum Polyphony 32 Drum Kits 45 Preset +1 Custom Songs 100 Tracks 4 (DRUM 1/DRUM
12、 2/DRUM 3/BACKING) Custom Song 1 Song (approximately 20,000 notes) Voices Drum Voices 192 + GM Voices 128 + Drum Kits 8 Functions Track ON/OFF, TAP START, BREAK, A-B REPEAT,DEMO Panel Controls STANDBY ON / OFF switch, PAD button, KIT button, SONG button, TEMPO button, VOLUME , buttons, HAND PERC but
13、ton, TRACK (DRUM 1 / DRUM 2 /DRUM 3 / BACKING) button, DEMO button, CLICK but-ton, START/STOP button, A-B REPEAT button, BREAK/TAP button, REC button, DIAL LED Display Song / Drum Kit / Tempo etc. Auxiliary jacks DC IN12 V, PHONES / OUTPUT, MIDI IN / OUT, PEDAL 1/2 Oouput Impedance 33 (PHONES / OUTP
14、UT jack) Main Amplifier 5W + 5W (EIAJ) Speaker 8 cm x 2 Power Consumption 16 W (when using PA-5C power adaptor) Power Supply Adaptor:DC12V (Yamaha PA-5C sold separately) Batteries:Six “C” size, R-14(LR14), or equivalent batter-ies (sold separately) Dimensions (WxDxH) 558 x 355 x 174 mm (22” x 14” x
15、6” 7/8) Weight 3.8 kg (8 Ibs. 6 oz) Supplied Accessories Drum Stick x 2, Foot Pedal 1 Loading, 33 ) Level indicator (JIS-C curve; Input impedance, 1M or more; Loading, 33 ; 0dBm: 1mW 600 ) Test jigs: Power adaptor, PA-5C Stick A.Setting Conditions Set the STANDBY/ON switch to ON with the TEMPO and H
16、ANDPERC button pressed and held (Fig. 1). B.Test Entry To scroll the test items, press the VOLUME button for forwards, and the VOLUME for backwards. To start a test, press the START/STOP button. Pressing the START/STOP button again returns to the selected item. If you pass the test and return to the
17、 selected item, a dot appears on the upper left of the LED segment (See Fig.2). If you fail the test, the LED shows “Err” (See Fig.3). To return to the selected item, press the DEMO button. (Note that the START/STOP button is inactive at this time.) *Even if the test has successfully completed, pres
18、sing the DEMO button forces the system back to the Item Selection. *The LED displays, and/or the interactions for OK/NG may be different depending on the test types. For details, see each test item you want to perform. C.Step for NG If the unit could not pass a test press the DEMO button to display
19、the “Test Item Selection” screen. (Note that the START/STOP button is inactive at this time.) 17 DD-55 5.Test Items Test No.LED displayTest function and judgment criteria 1001: VersionDisplays version for ROM. ROM versions are displayed alternately in the LED. Displaying the test result OK, XXX: XX
20、NG: Err 2002: Rom Check 1Checks the ROM. The test result appears on the LED. Displaying the test result OK: PAS NG: Err 3003: Ram Check 1Checks all RAMs which are connected to the CPU. The test result appears on the LED. Displaying the test result OK: PAS NG: Err 11011: TG1 CheckOutput the sine wave
21、 by changing the channels in sequence from C2 to G4. After autoscaling is finished, individual keys can be played. Check to see if there is no abnormal noie or tone. 13013: Pitch CheckChecks the Pitch. Connect the frequency counter to the PHONES/OUTPUT jack. Check that the 440.0 +/-1.76 Hz signal is
22、 output. 14014: Output R CheckConnect the level meter (with a JIS-C filter) to the PHONES/OUTPUT jack. (Load: 33 ohm) PHONES L: Less than -60.0 dBm PHONES R: -11.5 dBm +/-2 15015: Output L CheckConnect the level meter (with a JIS-C filter) to the PHONES/OUTPUT jack. (Load: 33 ohm) PHONES R: Less tha
23、n -60.0 dBm PHONES L: -11.5 dBm +/-2 dB 19019: Noise Level CheckConnect the level meter (with a JIS-C Filter) to the PHONES/OUTPUT jack. (Load: 33 ohm) Phones L/R: Less than -80.0 dBm 20020: Switch and LED CheckCheck switches on the panel and LED. Press the switches which are displayed on the LED. A
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