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Yamaha EZ-EG Service Manual

Summary of EZ-EG

  • Page 1

    Contents specifications ··································································· 3 panel layout ······································································· 4 circuit board layout ······················································ 5 block diagram ···························...

  • Page 2

    Ez-eg 2 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 th...

  • Page 3: Specifications

    Ez-eg 3 specifications strings frets displays voices play modes controls songs tremolo arm range tempo range balance range capo range tuning connectors maximum output power phones/output speaker power supply power consumption dimensions (w x d x h) weight supplied accessories 6 12 numeric led displa...

  • Page 4: Panel Layout

    Ez-eg 4 1 2 4 5 6 7 16 17 18 19 8 9 10 11 12 13 14 15 3 1 frets 2 control section 3 strings 7 value [+]/[-] buttons 8 display 9 [balance] button 10 [tuning] button 11 [tempo] button 12 [capo] button 13 [song] button 14 [sound] button 15 [demo] button 16 play mode [1]/[strum], [2]/[chord], [3]/[both]...

  • Page 5: Circuit Board Layout

    Ez-eg 5 circuit board layout neck assembly lower case assembly strings sensor unit body assembly am-1 am-3 am-2 mute 1/2 dm pn cn3 cn1 cn901 cn902 cn801 cn701 cn604 cn501 cn601 cn602 vibrato arm unit.

  • Page 6

    Ez-eg 6 block diagram am-2 am-3 am-1 am-2 mute 1/2 dm pn tremolo unit sensor unit piezo sensor midi i/f sub cpu clock 8.00 mhz tremolo cn902 vr901 3p cn602 3p cn601 9p cn601 9p cn604 ic607 6p cn901 9p cn1 6p cn901 15 36 8,9 9p cn701 5p cn3 5p string speaker ic1 led driver sw matrix x84 led matrix x8...

  • Page 7: Disassembly Procedure

    Ez-eg 7 [220] [220] [220] [220] [220] [220] [220] [220] dm (fig. 4) [220]: bind head tapping screw-p 3.0x8 mfzn2bl (ep630220) [150] lower case assembly lower case assembly power knob volume knob power knob volume knob (fig. 1) (fig. 2) [150] [150] [150] [150]: pan head tapping screw-1 3.5x12 mfzn2bl...

  • Page 8

    Ez-eg 8 (fig. 7) [a50]: bind head tapping screw-b 3.0x6 mfzn2bl (ep600230) • vibrato arm unit (fig. 8) [a50] [a50] [a50] [a50] base b base b [a] [a] am-3 (fig. 6) [60]: bind head tapping screw-p 3.0x30 mfzn2bl (v8529300) [110]: bind head tapping screw-p 3.0x8 mfzn2bl (ep630220) [130]: bind head tapp...

  • Page 9: Lsi Pin Description

    Ez-eg 9 [80] [n100] [n100] [80] [n100] body assembly body assembly body assembly [n70] [n70] [n70] [n70] [n70] [n70] pn (fig. 10) (fig. 11) [n70]: bind head tapping screw-p 3.0x6 mfzn2bl (ep630220) [80]: bind head tapping screw-p 4.0x35 mfzn2bl (v8525500) [n100]: flat head tapping screw-p 3.0x16 mfz...

  • Page 10

    Ez-eg 10 pin no. I/o function name pin no. I/o function name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83...

  • Page 11: Ic Block Diagram

    Ez-eg 11 ic block diagram 74hcu04dt (xz110a00) hex inverter dm: ic607 hd74lvc08fp (xu720a00) quad 2 input and dm: ic306 mm74hc14sjx (xw104a00) hex inverter dm: ic702 tc74hc4053aft (xv944a00) multiplexer/demultiplexer dm: ic701 µpc4572g2-t1 (xf634a00) njm2904v(te1) (xr532a00) dual operational amplifi...

  • Page 12: Circuit Boards

    Ez-eg 12 component side pattern side to mute-cn1 dm circuit board to am1-cn801 to am2-cn901 to pn-cn3 to am3-cn902 2na-wa08980 (v847030 ) 3 circuit boards am-1 (x2281c0) ··········································· 13 am-2 (x2281c0) ··········································· 13 am-3 (x2281c0) ······...

  • Page 13

    Ez-eg 13 component side component side pattern side component side component side midi in dc in 9v battery (sum3 x 6) phones/ output midi out to dm-cn501 to dm-cn602 tremolo am-1 circuit board am-3 circuit board am-2 circuit board mute 1/2 circuit board mute 2/2 circuit board power on/ standby volum...

  • Page 14

    Ez-eg 14 2na-v861540-1 1 component side to dm-cn701 pn circuit board a' a a' a b' b b' b string-1 string-2 string-3 string-4 string-5 string-6.

  • Page 15

    Ez-eg 15 2na-v861540-2 1 pattern side pn circuit board d' d d' d c' c c' c capo tempo tuning balance strum fret-1 fret-2 fret-3 fret-4 fret-5 fret-6 fret-7 fret-8 fret-9 fret-10 fret-11 fret-12 chord play mode demo sound song both value+ value-.

  • Page 16: Test Program

    Ez-eg 16 test program 1. Preparation pa-d09 (ac adaptor) is used. Set the [master volume] to maximum. Jigs: frequency counter, level meter (with jis-a filter), midi cable note) connect a stereo plug to the [phones/output] jack at 33 ohms. Please refer to the internet site below for information and t...

  • Page 17

    Ez-eg 17 test no. 20 21 25 30 33 36 37 41 42 43 45 48 7-seg. Led for each test or or or or or or or check the switches and the leds on the panel. Turn on the switches as shown on the leds in the sequence indicated in table 1 (p.18). A sound is generated while the fret switch is on. (without key stic...

  • Page 18: Inspection

    Ez-eg 18 demo 1 tuning 10 – 11 + 12 sound 2 song 3 strum 4 1st fret of 1st string 13 chord 5 both 6 tempo 7 balance 8 capo 9 2nd fret of 1st string 14 12th fret of 1st string 24 1st fret of 2nd string 25 12th fret of 6th string 84 1 84 2 3 9 10 4 24 14 13 5 6 11 12 7 8 25 (preparation) pa-d09 (ac ad...

  • Page 19: Midi Implementation Chart

    Ez-eg 19 midi implementation chart yamaha [ easy guitar ] date: 26-nov-2002 model ez-eg midi implementation chart version: 1.0 transmitted recognized remarks function... Basic default 1 - 6 1 - 16 *1 channel changed x 1 - 16 *1 default 3 3 mode messages x x altered ************** x note 28 - 88 0 - ...

  • Page 20

    Ez-eg 20 *1. *2. Ez-eg functions as a 16-channel multi-timbral tone generator, and incoming data does not affect the panel voices or panel settings. However, the midi messages listed below do affect the panel voices and songs. • midi master tuning exclusive f0h, 7eh, 7fh, 09h, 01h, f7h • this messag...

  • Page 21: Parts List

    • the numbers in “ qty ” show quantities for each unit. • the parts with “ - - ” in “ part no. ” are not available as spare parts. • the mark “ } ” in the remarks column indicates that these parts are interchangeable. • the second letter of the shaded ( ) part number is o, not zero. • the second let...

  • Page 22: Overall Assembly

    Ez-eg 2 l120 l120 240 l10 250 190 150 l130 l10a l10b 140 l90 l120 l140 220 270 62 60 62 60 10a 10c 10d 10b 90 80 body assembly j only lower case assembly lower case sub assembly 10c 10b 10d 10 130 160 a10 a50 a40 a70 a30 a20 a60 120 vibrato arm unit 50 100 110 n100 n90 n40 n30 n20 n110 n130a n130 n7...

  • Page 23

    Ez-eg 3 overall assembly overall assembly overall assembly body assembly body end pin chrome felt oval head tapping screw upper case bind head tapping screw-p flat washer neck assembly bind head tapping screw-p flat washer strings sensor unit bind head tapping screw-p vibrato arm unit bind head tapp...

  • Page 24: Strings Sensor Unit

    Ez-eg 4 is attached to . It cannot be removed. 10 160 150 190 70 60 200 280 270 100 90 80 80 21 20 30 200 210 210 50 150 160 190 140 130 180 180 230a 230b (with a pattern) (with no pattern) 10 190 70 280 270 strings sensor unit battery cover connector assembly l130 l140 v8521800 - - c&c 11p 160l (v9...

  • Page 25

    Ez-eg 5 strings sensor unit sensor base speaker speaker wire spacer sensor holder a sensor holder b sensor bind head tapping screw-p circuit board bind head tapping screw-p string string bracket bracket bind head tapping screw-p vibration-proof holder stopper bind head tapping screw-p circuit board ...

  • Page 26: Electrical Parts

    Ez-eg 6 * electrical parts circuit board circuit board circuit board circuit board circuit board circuit board circuit board circuit board circuit board semiconductive cera. Cap. Mylar capacitor electrolytic cap. Electrolytic cap. Electrolytic cap. Electrolytic cap. Electrolytic cap. Electrolytic ca...

  • Page 27

    Ez-eg 7 connector assembly circuit board circuit board ceramic capacitor (chip) ceramic capacitor (chip) ceramic capacitor (chip) ceramic capacitor (chip) monolithic ceramic cap. Ceramic capacitor (chip) ceramic capacitor (chip) monolithic ceramic cap. Ceramic capacitor (chip) ceramic capacitor (chi...

  • Page 28

    Ez-eg 8 ceramic capacitor (chip) connector base post connector base post connector base post connector base post connector base post diode diode diode diode diode diode diode diode ic ic ic ic ic ic ic ic ic ic ic ic ic ic ic ic ic ic ic choke coil choke coil chip solid inductance carbon resistor ch...

  • Page 29

    Ez-eg 9 carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor ...

  • Page 30

    Ez-eg 10 carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) quartz crystal unit zener diode zener diode circuit board monolithic ceramic cap. Monolithic ceramic cap. M...

  • Page 31

    Ez-eg 11 led led led led led led led led led led led led led led led led led led led led led led led led led led led led led led led led led led led led led led display carbon resistor (chip) carbon resistor (chip) carbon resistor (chip) resistor array resistor array transistor array transistor arra...

  • Page 32

    1 2 3 4 5 6 7 8 9 10 11 12 a b c d e f g h ez-eg ez-eg ez-eg ez-eg overall circuit diagram 1/2 (dm) op amp op amp op amp op amp op amp op amp inverter mute amp inverter inverter inverter inverter mask rom 16m wave swx00b multiplexer system reset op amp inverter dc-dc converter op amp dac regulator +...

  • Page 33

    1 2 3 4 5 6 7 8 9 10 11 12 a b c d e f g h ez-eg ez-eg ez-eg ez-eg overall circuit diagram 2/2 (am-1, am-2, am-3, mute 1/2, pn) am-1 to dm-cn501 power amp photo coupler am-2 to dm-cn601 am-3 to dm-cn602 piezo sensor pn cpu transistor array transistor array transistor array 7-seg. Display to dm-cn701...