Yamaha YDO-323 Service Manual
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Yamaha YDO-323 Service Manual

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SERVICE MANUAL
CONTENTS
SPECIFICATIONS ..................................................................... 3
PANEL LAYOUT ....................................................................... 4
DISASSEMBLY PROCEDURE ................................................. 5
LSI PIN DESCRIPTION ........................................................... 15
IC BLOCK DIAGRAM ............................................................. 17
CIRCUIT BOARDS .................................................................. 18
TEST PROGRAM ................................................................... 27
BACKING UP DATA AND INITIALIZING THE SETTINGS .... 32
TRANSMITTING SONG DATA BETWEEN THE COMPUTER
AND YDP-323 ....................................................................... 33
MIDI IMPLEMENTATION CHART .......................................... 34
MIDI DATA FORMAT ............................................................. 35
PARTS LIST
BLOCK DIAGRAM
CIRCUIT BOARD LAYOUT & WIRING
OVERALL CIRCUIT DIAGRAM
PK
001744
Copyright (c) Yamaha Corporation. All rights reserved. PDF-K7901
'05.10

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  • Page 1 TRANSMITTING SONG DATA BETWEEN THE COMPUTER AND YDP-323 ............... 33 MIDI IMPLEMENTATION CHART .......... 34 MIDI DATA FORMAT ............. 35 PARTS LIST BLOCK DIAGRAM CIRCUIT BOARD LAYOUT & WIRING OVERALL CIRCUIT DIAGRAM 001744 Copyright (c) Yamaha Corporation. All rights reserved. PDF-K7901 ’05.10...
  • Page 2 YDP-323 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 YDP-323 SPECIFICATIONS Item YDP-323 Keyboard 88 keys (A-1 - C7) Sound Source AWM Stereo Sampling Polyphony 64 Notes Max. Voice Selection Effect Reverb Volume Master Volume Controls Dual, Metoronome, Transpose Pedal Damper, Sostenuto, Soft Demo Songs 10 Demo Songs, 50 Piano Preset Songs Recording Function One song 65 KB (approx.
  • Page 4 YDP-323 PANEL LAYOUT MIDI PEDAL POWER 1 [POWER] switch 2 [DEMO/SONG] button 3 [PIANO/VOICE] button 4 [SELECT] button YDP-323 5 [REC] button 6 [PLAY] button 7 [METRONOME] button 8 [MASTER VOLUME] dial 9 [PHONES] jacks 0 MIDI [IN] [OUT] terminals A [PEDAL] terminal B Soft pedal (left) C Sostenuto pedal (center)
  • Page 5 YDP-323 DISASSEMBLY PROCEDURE Caution: Be sure to attach the removed filament tape just as it was before removal. Top Board Assembly Headphone Hanger (Time required: About 1 minute) (Time required: About 1 minute) Close the key cover. Remove the two (2) screws marked [11b]. The Remove the three (3) screws marked [S09].
  • Page 6 YDP-323 Circuit Boards & Assemblies (Main Unit) (Time required: About 3 minutes each) Remove the top board assembly. (See procedure 3) Each circuit board and assembly can be removed by removing its fixing screws as listed below. Circuit board and Assembly Ref.
  • Page 7 YDP-323 Key Cover Assembly (Pattern side) Solder (Time required: About 2 minutes) Close the key cover. Remove the top board assembly. (See procedure 3) Lift the rear key cover assembly. (Fig. 7) Lean slightly the key cover assembly so that the guide pin can be removed from the guide rail.
  • Page 8 YDP-323 Rack (L, R) Stopper Rail Assembly (Time required: About 3 minutes each) (Time required: About 5 minutes) Remove the top board assembly. (See procedure 3) 10-1 Remove the top board assembly. (See procedure 3) Remove the key cover assembly. (See procedure 8) 10-2 Remove the key cover assembly.
  • Page 9 YDP-323 MVR Circuit Board, PANEL Circuit Board HP Circuit Board (Time required: About 7 minutes each) (Time required: About 6 minutes) 13-1 Remove the top board assembly. (See procedure 3) 15-1 Remove the top board assembly. (See procedure 3) 13-2 Remove the key cover assembly.
  • Page 10 YDP-323 Back Top Board Assembly Main Unit (Time required: About 3 minutes) (Time required: About 3 minutes) 17-1 Remove the top board assembly. (See procedure 3) 18-1 Spread a soft cloth like a blanket on the floor where 17-2 Remove the two (2) screws marked [S04A] each from the main unit is to be placed in advance.
  • Page 11 YDP-323 Side Board Assemble (L, R) Z CAUTION Do not hold the key cover or top portion. (Time required: About 4 minutes) For safety, this work should be done by two persons. 20-1 Remove the headphone hanger. (See procedure 1) Key cover 20-2 Disconnect the AC cord and the PK-LF cable.
  • Page 12 YDP-323 Pedal Box Assembly ● Pedal assembly [7B] [7B] [7B] [7B] [7B]: Bind Head Tapping Screw-1  4.0X14 MFZN2W3 (WE971900) [8]: Truss Head Tapping Screw-1  4.0X12 MFZN2W3 (WF745900) Fig. 20 Disassembling the Keyboard After inserting a round stick (Rod: TX000670) between the frame and the keys, remove the circuit boards. (Fig. 21) GHD EBUS L, MK SUB Circuit Board 23-1 Remove the seven (7) screws marked [260A].
  • Page 13 YDP-323 Rubber contact 23-4 Remove the GHD circuit board for the involved key. The rubber contacts can then be removed. (Fig. 23, Rubber contact Rubber contact GHD EBUS L Fig. 23 Fig. 24 23-5 White key 23-8 Hammer, White Key In order to release the white key from the stopper, insert After a key has been removed, push a key spring down a thin plate between the white keys (gap in the direction...
  • Page 14 YDP-323 Assembling the Keyboard GHD EBUS L, MK SUB Circuit Board 24-4 24-1 Hammer, White Key (Hammer, Black Key) Tighten the seven (7) screws marked [260A] to fix the Place the keyboard assembly upside-down, insert a GHD EBUS L, MK SUB circuit boards. (Fig. 22) hammer assembly into the frame, and put the stopper (L88_W) on.
  • Page 15 YDP-323 LSI PIN DESCRIPTION AK4385ET (X6040A00) DAC (Digital to Analog Converter) ....... . 17 HD6433690FYV H8/300 (X6008100) CPU (E-HOSTs) .
  • Page 16 YDP-323 YMW767-VTZ (X6055A00) CPU (SWL01B) DM: IC004, IC007 NAME FUNCTION NAME FUNCTION Ground Ground Input for TEST Power supply +3.3 V TESTN PLLBPN PLL bypass select External memory lower-byte enable / Port F LBN/LWRN/PF6 PLLV PLL Power supply +2.5 V External memory upper-byte enable / Port F UBN/UWRN/PF7 Capacitor terminal for PLL...
  • Page 17 YDP-323 AK4385ET (X6040A00) DAC (Digital to Analog Converter) DM: IC011 NAME NAME FUNCTION FUNCTION AOUTR- Rch Analog out(-) MCLK Master Clock AOUTR+ Rch Analog out(+) BICK Audio Serial Data Clock AOUTL- Lch Analog out(-) SDTI Audio Serial Date Input LRCK AOUTL+ Lch Analog out(+) L/R Clock...

  • Page 18: Table Of Contents

    YDP-323 CIRCUIT BOARDS DJACK (X6372C0) ..... . . 18 MK SUB (XZ142B0) ..... . 22 DM (X5830D0) .
  • Page 19 YDP-323 DM Circuit Board not installed to GHD EBUS L-CN1 to PANEL-CN1 to DJACK-CN1 Component side not installed to PANEL-CN1 not installed to MAEQ-CN4 Pattern side 2NA-WD97020 2...
  • Page 20 YDP-323 MAEQ Circuit Board 2NA-WE74500 3...
  • Page 21 YDP-323 MAEQ Circuit Board 2NA-WE74500 3...
  • Page 22 YDP-323 PEDAL Circuit Board Soft Pedal Sostenuto Pedal Damper Pedal HP Circuit Board to DJACK-JK3 Component side MK SUB Circuit Board not installed to GHD EBUS L-CN5 to GHD EBUS L-CN4 Component side Component side PHONES PL Circuit Board Pattern side Component side 2NA-V004770 MK SUB: 2NA-V658810...
  • Page 23 YDP-323 GHD EBUS L Circuit Board 2NAK8-V646930...
  • Page 24 YDP-323 GHD M Circuit Board 2NAK8-V852140...
  • Page 25 YDP-323 GHD H Circuit Board 2NAK8-V852150...
  • Page 26 YDP-323 PS Circuit Board * This shows the F-version circuit board diagram. It differs from the E version one par tially with respect to the surface printing. (The pattern is the same.)
  • Page 27 YDP-323 TEST PROGRAM Preparation • Following items are required for testing. (Input impedance of measuring instrument is more than 1MΩ) - Level meter (with JIS-C Filter) - Frequency counter: Below decimal point 3 or more figures measurement is possible. - MIDI cable •...
  • Page 28 YDP-323 Table 1 Test items Test item Test function and judgment criteria ROM version check To check the Master ROM version using C0–A2 keys. To check the Slave ROM version using C3–A5 keys. Press keys in the specified range and find the key where the sine wave sounds. Check the version by the scale of that key.
  • Page 29 YDP-323 Test item Test function and judgment criteria TG1 check The sine wave sounds from the low range in the key range (A0–E3) capable of sounding (Auto Scaling) while the sound production channel of the sound source is changed one after another. (The sound stops after sounding of all 32 channels.) Check that no abnormal sound or noise is generated.
  • Page 30 YDP-323 Test item Test function and judgment criteria SW check Press switches one at a time in the order as in Table 2 (p.31). The sine wave sounds at the scale corresponding to each switch being pressed (Refer to Table 2 in p.31.). Also, when there is an LED corresponding to that switch, the LED lights up while the switch is pressed.
  • Page 31 YDP-323 Test item Test function and judgment criteria Flash ROM check 2 To check erase, write, read functions for all banks of Flash ROM * Note that execution of this test causes all data in Flash ROM to be erased. (a) Erase function check Perform the erasing procedure to the entire Flash ROM and check if it is successful.
  • Page 32 YDP-323 BACKING UP DATA AND INITIALIZING THE SETTINGS Backing up data to flash memory The following items will be stored in flash memory on this instrument. This data will be kept after you turn off the power to the instrument. Backup data Metronome volume Metronome tempo...
  • Page 33 Yamaha website. To be able to use this function, you must first download Musicsoft Downloader from Yamaha website at the following URL, and install it on your computer.
  • Page 34 YDP-323 MIDI IMPLEMENTATION CHART MIDI Implementation Chart YAMAHA [ Digital Piano ] Date :08-APR-2005 Version : 1.0 Model YDP-323 MIDI Implementation Chart Function... Transmitted Recognized Remarks Basic Default 1-16 1-16 Channel Changed 1-16 Mode Default Messages Altered ************** 0-127 0-127...
  • Page 35 YDP-323 MIDI DATA FORMAT If you’re already very familiar with MIDI, or are using a computer to control your music hardware with computer-generated MIDI messages, the data provided in this section can help you to control this instrument. 1. NOTE ON/OFF 3.
  • Page 36 YDP-323 4. PROGRAM CHANGE 7. SYSTEM EXCLUSIVE MESSAGES (Universal System Exclusive) Data format: [CnH] -> [ppH] CnH = Program event (n = channel number) (1) Universal Realtime Message ppH = Program change number Data format: [F0H] -> [7FH] -> [XnH] -> [04H] -> [01H] -> P.C.#=Program Change number [llH] ->...
  • Page 37 Data format: [F0H] -> [43H] -> [1nH] -> [4CH] -> [hhH] -> F0H = Exclusive status [mmH] -> [llH] -> [ddH] -> [F7H] 43H = Yamaha ID F0H = Exclusive status 73H = Digital Piano ID 43H = YAMAHA ID 7FH = Extended Product ID 1nH = When received, n=0~F.
  • Page 38 YDP-323 <Table 1> MIDI Parameter Change table (SYSTEM) Address (H) Size (H) Data (H) Parameter Description Default value (H) 00 00 00 020C - 05F4(*1) MASTER TUNE -50 - +50[cent] 00 04 00 00 1st bit 3 - 0 bit 15 - 12 2nd bit 3 - 0 bit 11 - 8 3rd bit 3 - 0...
  • Page 39 PARTS LIST CONTENTS HEADPHONES JACK ASSEMBLY ......17 OVERALL ASSEMBLY ..........2 D-JACK ASSEMBLY ..........18 MAIN UNIT ............... 4 POWER SUPPLY UNIT ......... 19 MUSIC REST ASSEMBLY ........9 PEDAL BOX ASSEMBLY ......... 20 TOP BOARD ASSEMBLY ........10 PEDAL ASSEMBLY ..........

  • Page 40: Overall Assembly

    YDP-323 OVERALL ASSEMBLY Main Unit: Screw Set See page 4. Side Board Assembly L: (6 x 20) (4 x 20) See page 14. (6 x 16) Side Board Assembly R: See page 14. (4 x 12) Headphone Hanger Set Pedal Box Assembly: See page 20.
  • Page 41 YDP-323 PART NO. DESCRIPTION REMARKS REF NO. RANK OVERALL ASSEMBLY YDP-323 Main Unit (WE89470) Side Board Assembly L LEFT (WE91870) Side Board Assembly R RIGHT (WE91930) WF788800 Screw Set WF001300 Truss Head Screw 6.0X20 MFZN2B3 WE997700 Truss Head Screw 4.0X12 MFZN2B3 WE969400 Bind Head Screw 6.0X16 MFZN2B3...

  • Page 42: Main Unit

    YDP-323 MAIN UNIT Rear view Music Rest Assembly: Top Board Assembly: See page 9. See page 10. Top view 1 Top view 2 End Block Assembly L: End Block Assembly R: See page 16. See page 17. Side view LOCATION SYMBOL Music Rest Assembly: See page 9.
  • Page 43 YDP-323 Bottom view Keybed & Front Rail Assembly: See page 6. Top view 3 Power Supply Unit: D-JACK Assembly: See page 19. See page 18. Arm Assembly L: Headphones Jack Assembly: Keyboard Assembly: Arm Assembly R: See page 12. See page 17. See page 22.
  • Page 44 YDP-323 Keybed & Front Rail Assembly Keybed Assembly  T1ab T1ab T1ab T1ab T1ac T1aa T1aa T1aa Front Rail Assembly  SEC. A–A T2cb T2ca T2ca T2ca T2cb...
  • Page 45 YDP-323 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK MAIN UNIT YDP-323 Main Unit (WE89470) Composite Common Parts (WE89560) Name Plate (WF82830) Power Supply Unit (WF16800) WE970900 Bind Head Tapping Screw-1 3.5X12 MFZN2W3 V 9 5 5 9 7 0 0 PS Cover Assembly ...
  • Page 46 YDP-323 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK * T1aa WF738300 B 5.0X12 MFZN2W3 * T1ab 6.0X12.5 B WF582400 * T1ac 4.0X12.5 I WF561000 VZ750500 Cushion Black Cushion PEFU2X4X330TE-PUTS (V890430) Speaker Grille (WF08450) VU891300 Cord Holder Black L=80 Holder, DM (WE89700) Holder, MA (WE89760)

  • Page 47: Music Rest Assembly

    YDP-323 MUSIC REST ASSEMBLY Side view Front view Rear view PART NO. DESCRIPTION REMARKS REF NO. QTY RANK MUSIC REST ASSEMBLY YDP-323 WE911900 Music Rest Assembly Music Rest (V804570) Music Rest Rail F FRONT (WF22660) WG263300 Hinge Assembly V 8 4 3 7 6 0 0 Hinge Nonwoven Fabric Cloth (WG26320)

  • Page 48: Top Board Assembly

    YDP-323 TOP BOARD ASSEMBLY Top view Side view PART NO. DESCRIPTION REMARKS REF NO. QTY RANK TOP BOARD ASSEMBLY YDP-323 WE906400 Top Board Assembly Top Board Assembly (WE90760) WF470300 Stopper Rail, Music Score Nonwoven Fabric Cloth 12X8X0.35 (V278050) WF054600 Screw 2.2X5.8 MFZN2W3 WF856700 Strap Screw...

  • Page 49: Key Cover Assembly

    YDP-323 KEY COVER ASSEMBLY Bottom view Sash Assembly F PART NO. DESCRIPTION REMARKS REF NO. QTY RANK KEY COVER ASSEMBLY YDP-323 WE914600 Key Cover Assembly Slide Cover (WE91510) WE915800 Sash Assembly F FRONT Sash F FRONT (WE91590) WF875600 Guide Pin 3.0X20 TP #B Spacer (V549580)

  • Page 50: Arm Assembly

    YDP-323 ARM ASSEMBLY Top view Arm Assembly L only. Side view Arm Assembly R only. Front view NOTE: This figure shows the left arm assembly.
  • Page 51 YDP-323 Arm Assembly L PART NO. DESCRIPTION REMARKS REF NO. QTY RANK ARM ASSEMBLY L LEFT YDP-323 Arm Assembly L LEFT WE900900 Side Cover L LEFT (WE90210) V 8 5 1 8 1 0 0 Guide Rail L LEFT WE970900 Bind Head Tapping Screw-1 3.5X12 MFZN2W3 VN887000...

  • Page 52: Side Board Assembly

    YDP-323 SIDE BOARD ASSEMBLY Top view Front view Side view NOTE: This figure shows the left side board assembly.
  • Page 53 YDP-323 Side Board Assembly L PART NO. DESCRIPTION REMARKS REF NO. QTY RANK SIDE BOARD ASSEMBLY L LEFT YDP-323 Side Board Assembly L LEFT (WE91870) Side Board L LEFT WE920100 WE923000 Stand Base WF514200 Pan Head Tapping Screw-1 4.0X65 MFZN2W3 VQ958300 Holder, Back Board VS295500...

  • Page 54: End Block Assembly L

    YDP-323 END BLOCK ASSEMBLY L Top view Bottom view YDP-323 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK END BLOCK ASSEMBLY L LEFT YDP-323 End Block Assembly L LEFT (WE90470) End Block Sub Assembly L LEFT WE905100 Nonwoven Fabric Cloth 25X8X0.35 (V468640) Angle, PL...

  • Page 55: End Block Assembly R

    YDP-323 END BLOCK ASSEMBLY R Side view Power Switch Assembly Bottom view PART NO. DESCRIPTION REMARKS REF NO. QTY RANK END BLOCK ASSEMBLY R RIGHT YDP-323 V 8 7 3 3 3 0 0 End Block Assembly R RIGHT V 9 3 6 1 8 0 0 End Block Sub Assembly R RIGHT YMMA Nonwoven Fabric Cloth...

  • Page 56: Djack (X6372C0)

    YDP-323 D-JACK ASSEMBLY PART NO. DESCRIPTION REMARKS REF NO. QTY RANK D-JACK ASSEMBLY YDP-323 D-JACK Assembly (WE91680) Angle, D-JACK (WE91690) WE910100 Circuit Board DJACK WE774400 Bind Head Tapping Screw-B 3.0X8 MFZN2B3 WE774300 Bind Head Tapping Screw-B 3.0X8 MFZN2W3 : New Parts RANK: Japan only...

  • Page 57: Power Supply Unit

    YDP-323 POWER SUPPLY UNIT Top view Front view PART NO. DESCRIPTION REMARKS REF NO. QTY RANK POWER SUPPLY UNIT YDP-323 Power Supply Unit (WF16800) Bind Head Tapping Screw-B 3.0X10 MFZN2B3 WE972200 VZ958800 Plate, AC Inlet V 0 0 1 0 8 0 0 Circuit Board WE987400 Bind Head Tapping Screw-B...

  • Page 58: Pedal Box Assembly

    YDP-323 PEDAL BOX ASSEMBLY Bottom view Pedal Assembly: See page 21. Front view PART NO. DESCRIPTION REMARKS REF NO. QTY RANK PEDAL BOX ASSEMBLY YDP-323 Pedal Box Assembly (WE92480) Pedal Box WE925400 VU464300 Felt Red 115X12X2 V 0 0 5 3 7 0 0 Pedal Assembly CB065520 Nylon Clamp...

  • Page 59: Pedal Assembly

    YDP-323 PEDAL ASSEMBLY • Top view • Side view PART NO. DESCRIPTION REMARKS REF NO. QTY RANK PEDAL ASSEMBLY YDP-323 V 0 0 5 3 7 0 0 Pedal Assembly Pedal Frame VU339700 VU362000 Pedal Piece C CENTER SOSTENUTO pedal VU362100 Pedal Piece L LEFT...

  • Page 60: Keyboard Assembly

    YDP-323 KEYBOARD ASSEMBLY GH key set GHD frame assembly GHD frame assembly...
  • Page 61 YDP-323 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK KEYBOARD ASSEMBLY GHD_EBUS A88 K6 YDP-323 V 8 2 7 8 5 0 0 Keyboard Assembly GHD_EBUS A88 K6 Frame (WC96120) VU342100 Stopper Felt 1229X12X14.8T U88 VY828500 Hammer Assembly, White Key W1 A-1-F1 VY828600 Hammer Assembly, White Key...

  • Page 62: Bench (Bc-100Dr)

    YDP-323 BENCH (BC-100DR) PART NO. DESCRIPTION REMARKS REF NO. QTY RANK BENCH BC-100DR YDP-323 V 5 5 3 1 4 0 0 Bench BC-100DR Bench BC-100DR (V553200) V 5 5 3 2 9 0 0 Bench Board Assembly AA016480 Holder, Leg WE970700 Bind Head Tapping Screw-1 3.5X16 MFZN2W3...

  • Page 63: Dm (X5830D0)

    YDP-323 ELECTRICAL PARTS PART NO. DESCRIPTION REMARKS REF NO. QTY RANK ELECTRICAL PARTS YDP-323 Circuit Board DJACK (WE70680)(X6372C0) WE910100 Circuit Board (WE78630)(X5830D0) WE909700 V 8 5 1 4 8 0 0 Circuit Board GHD EBUS L (XZ138D0) V 6 5 8 8 2 0 0 Circuit Board MK SUB (V658810)(XZ142B0)
  • Page 64 YDP-323 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK  C0046 US065100 Ceramic Capacitor-F (chip) 0.100 50V Z RECT.   C0046 Ceramic Capacitor-F (chip) 0.1000 16V Z RECT. US135100   C0046 Ceramic Capacitor-F (chip) 0.1000 25V Z RECT. US145100 C0048 UF018100...
  • Page 65 YDP-323 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK CN004 VT388800 Base Post Connector PH 7P TE CN005 Base Post Connector PH 9P TE VT389000 CN007 Base Post Connector PH 11P TE VT389200 CN010 VT388800 Base Post Connector PH 7P TE ...
  • Page 66 YDP-323 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK R0082 RD356220 Carbon Resistor (chip) 2.2K 63M J RECT. R0083 RD356220 Carbon Resistor (chip) 2.2K 63M J RECT. R0084 Carbon Resistor (chip) 47.0 63M J RECT. RD354470 R0085 RD356330 Carbon Resistor (chip) 3.3K 63M J RECT.
  • Page 67 YDP-323 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK CN001 V 6 9 5 4 3 0 0 Connector 12P PFA105-122A01 CN003 Connector 24P PFA105-242A01 V 6 9 5 4 4 0 0 IC001 UPD780031AYGK-NO4 X0031200 L0001 VR243700 Chip Inductance 56U LEM2520 T 560J R0001 RD357100...
  • Page 68 YDP-323 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK -0008 WF204500 Electrolytic Cap. 220 25.0V TE- C0009 Electrolytic Cap. 3.3 50.0V TP WE662600 -0014 Electrolytic Cap. 3.3 50.0V TP WE662600 C0015 WE662800 Electrolytic Cap. 47 50.0V TP C0016 WE662800 Electrolytic Cap. 47 50.0V TP C0017 WE663100...
  • Page 69 YDP-323 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK  C0070 UA654470 Mylar Capacitor 0.0470 50V J RX TP   C0070 Monolithic Mylar Capacitor 0.047 50V J RX TP VE325600  C0071 Mylar Capacitor 2700P 50V J RX TP UA353270 ...
  • Page 70 YDP-323 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK R0026 RD356100 Carbon Resistor (chip) 1.0K 63M J RECT. R0027 Carbon Resistor (chip) 18.0K 63M J RECT. RD357180 R0028 Carbon Resistor (chip) 18.0K 63M J RECT. RD357180 R0029 RD355390 Carbon Resistor (chip) 390.0 63M J RECT.
  • Page 71 YDP-323 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK R0107 RD356470 Carbon Resistor (chip) 4.7K 63M J RECT. R0108 Carbon Resistor (chip) 10.0K 63M J RECT. RD357100 R0109 Carbon Resistor (chip) 4.7K 63M J RECT. RD356470 R0110 RD357220 Carbon Resistor (chip) 22.0K 63M J RECT.
  • Page 72 YDP-323 PART NO. DESCRIPTION REMARKS REF NO. QTY RANK  WD009700 Diode 10EDB40-TA1B2 TE-2  VN011300 Diode Stack D3SBA20 4.0A 200V Fuse 2.00A JU 250V KB003570 KB003630 Fuse 5.00A JU 125V Jumper Wire 0.55 (VD04170) VF790900 Coil SU10V-D20010 10uH  HF456100 Carbon Resistor 1.0K 1/4 J AX TP...
  • Page 73 <Page. 1> YDP-323 YDP-323 BLOCK DIAGRAM WARNING Components having special characteristics are marked Z and must be replaced with parts having specification equal to those originally installed. 88 Keys (GHD_EBUS) Note : See parts list for details of circuit board component parts. KEYBOARD (A-1 ~ C7) END BLOCK ASSEMBLY L...
  • Page 74 <Page. 2> YDP-323 YDP-323 OVERALL CIRCUIT DIAGRAM 1/2 (DJACK, DM, PANEL, PEDAL) PANEL MASK ROM 64M FLASH ROM 4M DRAM 4M PROG./WAVE 1 INVERTER not installed KEY MATRIX SW [0] SW [1] SW [2] SW [3] SW [4] SW [5] PANEL: SW1 PANEL: SW2 PANEL: SW3...

  • Page 75: Ghd Ebus L (Xz138D0)

    <Page. 3> YDP-323 YDP-323 OVERALL CIRCUIT DIAGRAM 2/2 (GHD EBUS L, GHD H, GHD M, HP, MAEQ, MK SUB, MVR, PL, PS) µPC24M12AHF-AZ (XU387A00) F # 2) GHD EBUS L (A-1 MAEQ REGULATOR +12V MAEQ: IC1 to DM-CN10 1: INPUT 2: GND R78/R81/C77/C78: not installed 3: OUTPUT...

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