Yamaha DD-55 Service Manual
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Yamaha DD-55 Service Manual

Digital percussion drum machine
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Table of Contents

See also: Owner's Manual
SERVICE MANUAL
PEDAL 2
PEDAL 1
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 IMPREMENTATION CHART .................................................... 20
PARTS LIST
OVERALL CIRCUIT DIAGRAM
This document is printed on chlorine free (ECF) paper with soy ink.
SK
001660
HAMAMATSU, JAPAN
1.42K-0.935 K
Printed in Japan 2001.05

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Summary of Contents for Yamaha DD-55

  • Page 1 SERVICE MANUAL PEDAL 2 PEDAL 1 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 ................

  • Page 2: Important Notice

    DD-55 IMPORTANT NOTICE This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed 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.

  • Page 3: Specifications

    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 6” 7/8) Weight 3.8 kg (8 Ibs.

  • Page 4: Panel Layout

    DD-55 PANEL LAYOUT Front Panel Pedal 2 Pedal 1 !0 !1 Front Panel q DEMO Button ! 0 SONG Button w CLICK Button !1 TEMPO Button e DISPLAY. !2 START/STOP Button r VOLUME [ ], [ ] Buttons !3 A-B REPEAT Button...
  • Page 5 DD-55 Side Panel L Side Panel R ! 9 @ 0 Side Panel (Left) Side Panel (Right) !9 DC IN 12V (AC Adaptor) Jack @2 MIDI IN Terminal @0 PHONES/OUTPUT Jack @3 MIDI OUT Terminal @ 1 PEDAL 2 Jack...

  • Page 6: Circuit Board Layout

    DD-55 CIRCUIT BOARD LAYOUT Top view Pad Assembly Lower Case Pad Assembly (L) Speaker(R) Speaker(L) U220 Upper Case...
  • Page 7 IC710-10 IC750-10 IC710-9 IC790-1 IC750-9 IC790-4 IC710-3 IC750-3 IC710-2 IC790-8 IC750-2 IC790-11...

  • Page 8: Disassembly Procedure

    DD-55 DISASSEMBLY PROCEDURE Lower Case Assembly (Time required: about 2 min) Remove the sixteen (16) screws marked [80]. The lower case assembly can then be removed. (Fig. 1) Lower Case [80] Lower Case Lower Case Screw Screw In this operation, screw an easily touch and scratch the bottom case, so be careful that screws do not contact it.
  • Page 9 DD-55 Speaker R Upper Case [130] Speaker L [135] [135] [130] [130]: Binding Head Tapping Screw-B 3.0X8 MFZN2Y (EP600250) [135]: Binding Head Tapping Screw-B 4.0X8 MFZN2Y (EP640410) (Fig. 6) Pad Assembly Pad Assembly (Time required: about 5 min) Remove the lower case assembly. (See procedure 1.) Remove the DD 2/2 circuit board.

  • Page 10: Lsi Pin Discription

    DD-55 LSI PIN DISCRIPTION HG73C205AFD (XU947C00) SWX00B TONEGENERATOR DD 1/2: IC100 NAME FUNCTION NAME FUNCTION Initial clear CMA3 RFCLKI PLL Clock CMA8 Program address bus PLL Control CMA2 AVDD_PLL Power supply read signal AVSS_PLL Ground CMA1 Program address bus MODE0...

  • Page 11: Ic Block Diagram

    DD-55 uPD63200GS (XM145A00) DAC (Digital to Analog Converter) DD 1/2: IC500 NAME FUNCTION NAME FUNCTION 4/8F 4/8 Fs selection R. REF Channel R voltage reference D. GND Digital ground L. REF Channel L voltage reference 16 BIT 16 bit/18 bit selection L.
  • Page 12 DD-55 DD 1/2 Circuit Board (Component Side) A’ to DD 2/2 CN460 Component Side DD 1/2: 2NA-V707790...
  • Page 13 DD-55 to Battery to Speaker L, R A’ Component Side DD 1/2: 2NA-V707790...
  • Page 14 DD-55 DD 1/2 Circuit Board (Pattern Side) PAD 1 PAD 2 DEMO CLOCK DRUM1 DRUM2 HAND PERC BREAK /TAP START /STOP REPEAT Pattern Side A’ DD 1/2: 2NA-V707790...
  • Page 15 DD-55 PAD 3 PAD 4 PAD 5 PAD 6 PAD 7 VOLUME DRUM2 DRUM3 BACKING SONG TEMPO STANDBY/ON Pattern Side A’ DD 1/2: 2NA-V707790...

  • Page 16: Test Program

    DD-55 TEST PROGRAM Setting Conditions Requirements for Measurement Before starting to measure the unit, make sure you have the following instrumentations and test jigs: Measuring instruments: Oscilloscope (Input impedance, 1M Ω or more; Loading, 33 Ω) Level indicator (JIS-C curve; Input impedance, 1M Ω or more; Loading, 33 Ω; 0dBm: 1mW 600 Ω)
  • Page 17 DD-55 Test Items Test No. LED display Test function and judgment criteria 001: Version Displays version for ROM. ROM versions are displayed alternately in the LED. [Displaying the test result] OK, X'XX: ["XX"] NG: ["Err"] 002: Rom Check 1 Checks the ROM.
  • Page 18 DD-55 030: Pad Check Checks the PAD. When a pad is tapped, the LED's indicate its identification number and tapping power. [Displaying the test result] Maximum data: 7F Minimum data: 18 031: Pedal 1 Check Checks the [PEDAL 1]. Connect the pedal to the [PEDAL 1] jack. When the pedal is stepped on, it sounds in bass drum tones.
  • Page 19 DD-55 Table 1. SW test Item Display Note Display Note A-B REPEAT HI-HAT START/STOP BACKING BRAKE/TAP DEMO SONG CLICK TEMPO HAND PERC. VOLUME BASS VOLUME SNARE DIAL...

  • Page 20: Midi Imprementation Chart

    DD-55 MIDI IMPREMENTATION CHART YAMAHA [ DIGITAL PERCUSSION ] Date:07-FEB-2001 Model DD-55 MIDI Implementation Chart Version : 1.0 Transmitted Recognized Remarks Function... Basic Default 1O - 16 1 - 16 Channel Changed 1 - 16 1 - 16 Default Mode...

  • Page 21: Parts List

    DD-55 PARTS LIST CONTENTS OVERALL ASSEMBLY ................... 2 ELECTRICAL PARTS ..................4 Note) DESTINATION ABBREVIATIONS Australian model South African model British model Chinese model Canadian model South-east Asia model German model Taiwan model European model U.S.A. model French model General export model (110V)

  • Page 22: Overall Assembly

    DD-55 OVERALL ASSEMBLY Upper Case Assembly U200 U130 U10c U10b U10a U100 U110 U210 U135 U220 U135 U140 L110 L100 Lower Case Assembly L100 ACCESSORIES: Stick...
  • Page 23 DD-55 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK OVERALL ASSEMBLY DD55 Overall Assembly J,U,W,C (V740240) Upper Case Assembly (V740450) V 7 4 0 4 6 0 0 Bottom Case Assembly V 7 4 0 6 3 0 0 Battery Cover Assembly...

  • Page 24: Electrical Parts

    DD-55 ELECTRICAL PARTS DESCRIPTION REMARKS PART NO. QTY RANK REF NO. ELECTRICAL PARTS V7077900 Circuit Board (XZ868F0) V7077900 Circuit Board (XZ868F0) EP600190 Bind Head Tapping Screw-B 3.0X8 MFZN2BL V7773500 Shield Cover V7860200 Cord Holder Jumper Wire 0.55 (VA07890) UR828100 C0101 Electrolytic Cap.
  • Page 25 DD-55 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK UR848100 Electrolytic Cap. C0804 100.00 25.0V V6490000 Monolithic Ceramic Cap. C0811 1.000 25V Z FG612470 Ceramic Capacitor-B C0812 470P 50V K V6490000 Monolithic Ceramic Cap. C0821 1.000 25V Z FG612470 C0822...
  • Page 26 DD-55 DESCRIPTION REMARKS PART NO. QTY RANK REF NO. VY717100 Diode D0902 LT2A02-E VB941200 Diode D0931 1SS133,1SS176 VD631600 Diode D0931 1SS133,176,HSS104 VB481900 Diode D0932 11ES4 VF195600 D0932 Diode 11ES4 TA1 VB481900 D0933 Diode 11ES4 VF195600 D0933 Diode 11ES4 TA1 VU481300...
  • Page 27 DD-55 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK V2993400 Coil L0791 R-5C.20U VB871100 Ferrite Beads L0851 BL02RN2-R62 VB871100 Ferrite Beads -0853 BL02RN2-R62 V2993400 Coil L0851 R-5C.20U V2993400 -0853 Coil R-5C.20U V I 4 8 6 8 0 0 L0900...
  • Page 28 DD-55 DESCRIPTION REMARKS PART NO. QTY RANK REF NO. HF757150 Carbon Resistor R0732 15.0K 1/4 J HF758100 Carbon Resistor R0733 100.0K 1/4 J HF757220 Carbon Resistor R0734 22.0K 1/4 J HF757330 Carbon Resistor R0735 33.0K 1/4 J HF757330 R0741 Carbon Resistor 33.0K 1/4 J...
  • Page 29 <P.1> DD-55 DD-55 OVERALL CIRCUIT DIAGRAM (DD 1/2, DD 2/2) FLASH ROM REGULATOR +3.3V RESET SRAM 1M SRAM 1M MIDI IN SWX00B MIDI OUT ANALOG SWITCH PEDAL 2 (SWITCH) PAD 1 SENSOR POWER AMP PAD 2 SENSOR OP AMP PAD 3 SENSOR...

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