YAMAHA EZ-AG Service Manual

SERVICE MANUAL PK 011700 Copyright (c) Yamaha Corporation. All rights reserved. PDF-K167 ’03.11 HAMAMATSU, JAPAN CONTENTS SPECIFICATIONS ..................................................................... 3 PANEL LAYOUT ...................................................................... 4 CIRCUIT BOARD LAYOUT ...................................................... 5 BLOCK DIAGRAM .......................................................................... 6 DISASSEMBLY PROCEDURE ................................................. 7 LSI PIN DESCRIPTION ............................................................. 9 IC BLOCK DIAGRAM ............................................................. 11 CIRCUIT BOARDS .................................................................. 12 TEST PROGRAM ................................................................... 16 INSPECTION .......................................................................... 18 MIDI IMPLEMENTATION CHART ......................................... 19 PARTS LIST OVERALL CIRCUIT DIAGRAM

EZ-AG 2 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 contain 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, unprotected 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. 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 under- stood 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- 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 presentation or sale of this manual to any individual or firm does not constitute authorization certifi- cation, recognition of any applicable technical capabilities, or establish a principal-agent relationship of any form. The data provided is belived to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and service departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable and changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributor’s 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 OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit. WARNING Components having special characteristics are marked and must be replaced with parts having specification equal to those originally installed.

3 EZ-AG SPECIFICATIONS Strings Frets Displays Sounds Play Modes Controls Songs Tempo Range Volume Range Balance Range Capo Range Tuning Connectors Maximum Output Power PHONES/OUTPUT Speaker Power Supply Power Consumption Dimensions (w x d x h) Weight 6 12 LED display, 6 x 6 fret LEDs 9 guitar, 8 bass, 3 others STRUM (right hand), CHORD (left hand), BOTH (both hands) [STANDBY/ON] switch, [STRUM] button, [CHORD] button, [BOTH] button, [DEMO] button, [SOUND] button, [SONG] button, [TEMPO] button, [VOLUME] button, [CAPO] button, [TUNING] button, VALUE [+]/[-] buttons 25 (additional songs can be loaded into internal memory from a computer) 32 - 280 0 - 127 0 - 127 0 - 6 28 tuning settings in addition to normal DC IN 12V, PHONES/OUTPUT, MIDI IN and MIDI OUT 3.3 W (When using PA-3C AC adaptor) 1.4 W (batteries) Output impedance: 77 Ω 10 cm PA-3B or PA-3C AC Power Adaptor Six 1.5 V LR6, ALKALINE “AA” SIZE 6.5 W (using the PA-3C) 863 x 307 x 81 mm (34" x 12" x 3-1/4") 1.9 kg (4 lbs. 3oz.) (w/o batteries)

EZ-AG 4 1st 6th 2 3 1 5 6 7 16 17 18 19 20 8 9 10 11 12 13 14 15 4 1 LED 2 Frets 3 Control Section 7 VALUE [+]/[-] buttons 8 Display 9 [VOLUME] 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] buttons 4 Strings 5 Bridge Plate 6 Connector & Power Switch Section 17 Power Switch ([STANDBY/ON]) 18 DC IN 12V jack 20 MIDI IN/MIDI OUT connectors 19 PHONES/OUTPUT jack Body PANEL LAYOUT Control Section Connector & Power Switch Section

5 EZ-AG CIRCUIT BOARD LAYOUT CN801 CN802 Neck assembly Strings sensor unit Bottom assembly Top assembly Battery cover assembly <Bottom view> <Top view> <Bottom view> <Bottom view> SE1 PN AM DM DM SE CN501 CN601 CN604 CN701 CN901 CN901 CN902 CN902 CN903 CN3 CN3 Adhesive tape MUTE connector assembly • First lot

EZ-AG 6 BLOCK DIAGRAM SPEAKER 4 Ω SENSOR AMP 6ch SE1 PN AM DM SE CN903 (4P) S2 S1-S6 8X10 IC1 (64P) TA1,3 (18P) S4 S6 S1 S3 S5 CN902 (4P) CN901 (7P) SENSOR UNIT MUTE PLATE STRING PIEZO SENSOR X3 PIEZO SENSOR X3 Earth Plate SUB CPU LED Driver CLOCK 8.00 MHz DGND 15 36 S [0-11] D [0-7] L [0-15] S [0-11] D [0-7] L [0-14] X1 8,9 6,7 9,10 RXD TXD +5D +3.3D +5D +5D +5D +5D JK702 (5P) JK701 (5P) to speaker JK802 (8P) JK801 (2P) +5D +5D CN3 (5P) SW MATRIX 7 Seg LED X84 LD90 LED MATRIX X36 D [0-7] L [12-14] CN601 (9P) CN604 (2P) IC601-606 (8P) CN602 (3P) not used +5D +5D 8 4 -5D RESET 3.6V IC703 (5P) CLOCK 8.4672MHz MAIN CPU SWX00B X102 IC201 (48P) IC101 (168P) ANALOG SW IC701 (16P) SENSOR AMP 1ch (MUTE) IC607 (14P) FT [0-5] 1-3,5,12,13 5 4,14,15 8 16 6 +5D 7 14 +5D +5D 5 4 1 17 14,15,16 152 DGND IC AN3 TXD1 RXD1 TXD0 RXD0 AN0,AN1, AN2 P-bus MUT [0] CN701 (5P) CN501 (11P) CN801 (11P) SP 9,10 S-bus 47,48,51-59,62-71 23-34,37-40 41 74 WAVE 32M MASK +3.3D 1,37,38,47,48 SMA [0-20] SMD [0-15] OE CE 27 24 SOE SCSO 46,88,93 +3.3D 1,25,26, 37,38 12,14,27, 37,46,47 88,90,95, 101,131,132 106-118, 121-123 75,76,79-87,89 96-99,102-105,124 C-bus PROGRAM 16M P2ROM IC302 (48P) OE CRD CE PROGRAM 16M MASK IC301 (48P) OE CE 2M SRAM IC303 (44P) OE 39,40 11,13 37,47 CLB, CUB CRD 41 17 6 28 11 26 CWE CS2 CS3 WE CE 4M Flash IC305 (48P) OE WE CE CS0, CS1 CS0 27 28 26 24 CMA [1-21] CMA [1-18] CMD [0-15] CMD [0-15] +3.3D +3.3D +5D +5D IC501 (8P) 4,7,18,35,49,61, 77,91,119,148 133,143,161 158,163,164 21 TX MIDI-TX MIDI-RX RX 154 20 153 DO0,WCLK, QCLK DAC 16Bit IC102 (3P) +3.3V REG. IC502 (8P) LPF & AMP IC503 (5P) +5V DC/DC CNV. MUTE IC504 (8P) -5V DC/DC CNV. 8 4 1 3 +5D 8 1 7 4 5,6,7 2,3 5,6 L R 2 3 1 4 2 6 1 2,3 1 5 4 IC801 (10P) TR703 IC701 (6P) TR701,702 9 8 7 10,11 1 3 2 -5D 10,11 8 4 5 7 9 +12V +5D POWER AMP MIDI I/F MIDI OUT IN PHONES/ OUTPUT DC IN 12V BATTERY SUM3X6 (+9V) STANDBY ON 6 4 5 +12V 4 1 10 2 7 1 2 D801 SW801 Wire - + CN802 (3P) : IC301 or IC302 are mounted. : solder 28CA1-8826574 DGND 2,3 DGND 6 AGND 6 AGND GND

7 EZ-AG [140B] [140B] Top assembly B (Sensor wire) Speaker B (Sensor wire) A (Speaker terminals) [110B] [110B] [110C] [110C] [110C] [110C] [110B] [110B] [130A] <Bottom view> SE SE1 Adhesive tape MUTE connector assembly • First lot DM [110A] [110A] [110A] [120A] [140A] [140A] Bottom assembly <Bottom view> [B120] [B120] [B120] [B190] Bottom assembly AM <Top view> DISASSEMBLY PROCEDURE 1. Bottom Assembly (Time required: About 2 minutes) 1-1 Remove the eight (8) screws marked [110A],the two (2) screws marked [120A] and the two (2) screws marked [140A]. The bottom assembly can then be removed. (Fig. 1) 2. AM Circuit Board (Time required: About 4 minutes) 2-1 Remove the bottom assembly. (See procedure 1.) 2-2 Remove the seven (7) screws marked [B120] and the screw marked [B190]. The AM circuit board can then be removed. (Fig. 2) 3. DM Circuit Board (Time required: About 3 minutes) 3-1 Remove the bottom assembly. (See procedure 1.) 3-2 Remove the two (2) screws marked [130A] and the two (2) screws marked [140B]. The DM circuit board can then be removed. (Fig. 3) 4. SE (SE+SE1) Circuit Board, Speaker 4-1 Remove the bottom assembly. (See procedure 1.) 4-2 SE (SE+SE1) Circuit Board (Time required: About 4 minutes): 4-2-1 Remove the four (4) screws marked [110B]. (Fig. 3) 4-2-2 Remove the solder from the two locations shown as A (the speaker terminals) and then remove the solder from the twelve locations shown as B (the sensor wire). The SE (SE+SE1) circuit board can then be removed. (Fig. 3) 4-3 Speaker (Time required: About 3 minutes): 4-3-1 Remove the four (4) screws marked [110C]. The speaker can then be removed. (Fig. 3) [110A]: Bind Head Tapping Screw-B 3.0X12 MFZN2Y (VE683000) [120A]: Bind Head Tapping Screw-B 4.0X35 MFZN2Y (WB535600) [140A]: Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ074600) (Fig. 1) [B120]: Bind Head Tapping Screw-B 3.0X8 MFZN2Y (EP600250) [B190]: Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ074600) (Fig. 2) [110]: Bind Head Tapping Screw-B 3.0X8 MFZN2Y (EP600250) [130A]: Bind Head Tapping Screw-B 3.0X8 MFZN2Y (EP600250) [140B]: Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ074600) (Fig. 3) Caution: Be sure to attach the removed filament tape just as it was before removal.

EZ-AG 8 Adhesive tape MUTE connector assembly • First lot Top assembly Strings sensor unit Neck assembly [140C] [130B] [130B] [140C] [130B] [120B] [120B] [130B] <Bottom view> Fingerboard Key top rubber A Key top rubber B Key top rubber C Key top rubber D [N70] Fingerboard [N70] <Bottom view> <Bottom view> PN 5. Strings Sensor Unit (Time required: About 3 minutes) 5-1 Remove the bottom assembly. (See procedure 1.) 5-2 Remove the four (4) screws marked [130B] and the two (2) screws marked [140C]. The strings sensor unit can then be removed. (Fig. 4) 6. PN Circuit Board, Key Top Rubber (Time required: About 4 minutes) 6-1 Remove the bottom assembly. (See procedure 1.) 6-2 Remove the three (3) screws marked [N100]. The earth plate can then be removed. (Fig. 5) 6-3 Remove the two (2) screws marked [120B]. The neck assembly can then be removed. (Fig. 4) (Come off the wire from the connector of the neck assembly side.) 6-4 Remove the two (2) screws marked [N70] from the fingerboard. The PN circuit board and the key top rubber can then be removed. (Fig. 6, 7) [120B]: Bind Head Tapping Screw-B 4.0X35 MFZN2Y (WB535600) [130B]: Bind Head Tapping Screw-B 3.0X8 MFZN2Y (EP600250) [140C]: Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ074600) (Fig. 4) [N100] Neck assembly Earth plate <Bottom view> [N100]: Flat Head Tapping Screw-B 3.0X16 MFZN2BL (WB329400) (Fig. 5) [N70]: Bind Head Tapping Screw-B 3.0X8 MFZN2Y (EP600250) (Fig. 6) (Fig. 7)

9 EZ-AG LSI PIN DESCRIPTION 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 S1 S2 S3 S4 S5 VREF+ VDD OSC2 OSC1 VSS XI XO MMOD RD0 RXD D0 D1 D2 D3 D4 /RST D5 D6 D7 D8 D9 S6 S7 S8 S9 S10 S11 I I I I I - - O I - I O I O I O O O O O I O O O O O I I I I I I Switch matrix data Power supply (+5V, analog) Power supply (+5V) Crystal oscillator (8MHz) Crystal oscillator (8MHz) Ground Not used Not used Memory mode select (Grounded) Rotary encoder data MIDI receive data LED and switch drive data Reset LED and switch drive data Switch matrix data 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 S12 S13 S14 TXD S15 S16 S17 S18 L16 L17 L18 L19 L8 L9 L10 L11 L12 L13 L14 L15 L7 L6 L5 L4 L3 L2 L1 L0 VREF AD0 AD1 S0 I I I O I I I I O O O O O O O O O O O O O O O O O O O O - I I I Switch matrix data MIDI transmit data Switch matrix data LED drive data LED and switch drive data Grounded Analog input Analog input Switch matrix data MN101C027YB (XS711200) CPU PN: IC001

EZ-AG 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 84 ICN RFCLKI TM2 AVDD_PLL AVSS_PLL MODE0 VCC7 GND8 XIN XOUT MODE1 TEST0 TESTON AN0-P40 AN1-P41 AN2-P42 AN3-P43 AVDD_AN AVSS_AN TXD0 TXD1 EXCLK SMD11 SMD4 SMD3 SMD12 SMD10 SMD5 SMD2 SMD13 SMD9 SMD6 SMD1 SMD14 VCC35 GND36 SMD8 SMD7 SMD0 SMD15 SOE SWE SRAS SCAS REFRESH CS0 SMA0 SMA16 VCC49 GND50 SMA1 SMA15 SMA2 SMA14 SMA3 SMA13 SMA4 SMA12 SMA5 GND60 VCC61 SMA11 SMA6 SMA10 SMA7 SMA9 SMA17 SMA8 SMA18 SMA19 SMA20 SMA21 SMA22 SMA23 CMA20 CMA19 VCC77 GND78 CMA18 CMA17 CMA5 CMA6 CMA4 CMA7 I I I I I O I I I I I I I O O O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O Initial clear PLL Clock PLL Control Power supply Ground SWX dual mode Power supply Ground crystal oscillator crystal oscillator SWX separate mode TEST pin TEST pin A/D converter A/D converter A/D converter A/D converter Power supply Ground for MIDI or TO-HOST for MIDI PORT-E2 Wave memory data bus Wave memory data bus Wave memory data bus Wave memory data bus Wave memory data bus Wave memory data bus Wave memory data bus Wave memory data bus Wave memory data bus Wave memory data bus Wave memory data bus Wave memory data bus Power supply Ground Wave memory data bus Wave memory data bus Wave memory data bus Wave memory data bus read signal write signal RAS signal CAS signal REFRESH signal CS signal Memory address bus Memory address bus Power supply Ground Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Ground Power supply Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Memory address bus Program address bus Program address bus Power supply Ground Program address bus Program address bus Program address bus Program address bus Program address bus Program address bus 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 CMA3 CMA8 CMA2 CRD CMA1 CUB VCC91 GHND92 CS1 CMA0 CLB CMA12 CMA11 CMA10 CMA9 GND100 CWE CMA16 CMA15 CMA14 CMA13 CMD8 CMD7 CMD9 CMD6 CMD10 CMD5 CMD11 CMD4 CMD12 CMD3 CMD13 CMD2 CMD14 VCC119 GND115 CMD1 CMD15 CMD0 CMA21 PDT15 PDT14 PDT13 PDT12 PDT11 PDT10 PDT9 PDT8 VCC133 GND134 PDT7 PDT6 PDT5 PDT4 PDT3 PDT2 PDT1 PDT0 VCA143 GND144 PAD2 PAD1 PAD0 VCC148 GND149 PCS PWR PRD RXD0 RXD1 SCLKI ADIN ADLR DO0 DO1 SYSCLK VCC161 GND162 WCLK QCLK BCLK SYI IRQ0 NMI O O O O O O O O O O O O O O O O O O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I I I I I I I I I I O O O O O O O I I I Program address bus Program address bus Program address bus read signal Program address bus high byte effective signal Power supply Ground CS signal Program address bus low byte effective signal Program address bus Program address bus Program address bus Program address bus Ground write signal Program address bus Program address bus Program address bus Program address bus Program memory Data bus Program memory Data bus Program memory Data bus Program memory Data bus Program memory Data bus Program memory Data bus Program memory Data bus Program memory Data bus Program memory Data bus Program memory Data bus Program memory Data bus Program memory Data bus Program memory Data bus Power supply Ground Program memory Data bus Program memory Data bus Program memory Data bus Program address bus SWX access data bus SWX access data bus SWX access data bus SWX access data bus SWX access data bus SWX access data bus SWX access data bus SWX access data bus Power supply Ground SWX access data bus SWX access data bus SWX access data bus SWX access data bus SWX access data bus SWX access data bus SWX access data bus SWX access data bus Power supply Ground SWX access address bus SWX access address bus SWX access address bus Power supply Ground Chip select write enable read enable for Midi or TO-HOST for Midi or Key scan EXT Clock A/D converter A/D converter LR clock DAC DAC 1/2 clock Power supply Ground for DAC LR clock 1/12 clock IIS-DAC clock Synch signal Interrupt request Interrupt request HG73C205AFD (XU947C00) SWX00B (Tone Generator) DM: IC101