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Yamaha MD4S Service Manual
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Yamaha MD4S Service Manual

Multitrack md recorder
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3 7 63 1515 0
TE
L 13942296513
www
.
PA
011433
19981210-79800
http://www.xiaoyu163.com
MULTITRACK MD RECORDER
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ao
u163
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i
http://www.xiaoyu163.com
2 9
8
SERVICE MANUAL
Q Q
3
6 7
1 3
1 5
CONTENTS
DISCS FOR MD4S ······································································5
SPECIFICATIONS·······································································6
PANEL LAYOUT ·········································································7
DIMENSIONS··············································································9
BLOCK DIAGRAM·······································································9
CIRCUIT BOARD LAYOUT·······················································10
DISASSEMBLY PROCEDURE ·················································11
LSI PIN DESCRIPTION·····························································13
IC BLOCK DIAGRAM ································································15
CIRCUIT BOARDS····································································18
ERROR MESSAGES ································································23
INSPECTION SPECIFICATION ················································24
MIDI IMPLEMENTATION CHART·············································30
PARTS LIST
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OVERALL CIRCUIT DIAGRAM
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9 4
2 8
0 5
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HAMAMATSU, JAPAN
1.93K-288
Printed in Japan '99.01
9 9
9 9

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  • Page 1 3 7 63 1515 0 MULTITRACK MD RECORDER SERVICE MANUAL L 13942296513 CONTENTS DISCS FOR MD4S ······································································5 SPECIFICATIONS·······································································6 PANEL LAYOUT ·········································································7 DIMENSIONS··············································································9 BLOCK DIAGRAM·······································································9 CIRCUIT BOARD LAYOUT·······················································10 DISASSEMBLY PROCEDURE ·················································11 LSI PIN DESCRIPTION·····························································13 IC BLOCK DIAGRAM ································································15 CIRCUIT BOARDS····································································18 ERROR MESSAGES ································································23...
  • Page 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 therefore not been restated.

  • Page 3: To Service Personnel

    MD4S 3 7 63 1515 0 TO SERVICE PERSONNEL Leakage Current Measurement (For 120 V Models Only). AC LEAKAGE WALL EQUIPMENT TESTER OR When service has been completed, it is imperative to OUTLET UNDER TEST EQUIVALENT verify that all exposed conductive surfaces are properly insulated from supply circuits.
  • Page 4 MD4S 3 7 63 1515 0 MD Unit CAUTION : INVISIBLE LASER RADIATION WHEN OPEN. CLASS 1 LASER PRODUCT AVOID EXPOSURE TO BEAM. VARNING : OSYNLIG LASERTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD. STRÅLEN ÄR FARLIG. VARO! : NÄKYMÄTÖNTÄ AVATTAESSA OLET ALTTIINA LASERSÄTEIL YLLE.
  • Page 5 DISC FOR MD4S It's important that you buy the correct type of disc for use with your MD4S. For 4-track recording and playback, you must use MD DATA discs. Regular MiniDiscs can only be used for 2-track recording and playback (2 TR mode).

  • Page 6: Specifications

    MD4S 3 7 63 1515 0 SPECIFICATIONS Recorder Sampling Frequency: 44.1 kHz Compression: ATRAC Frequency Response: 20 Hz–20 kHz, +1 dB, –3 dB Digital/Audio THD+N: Less than 0.02 % (1 kHz) S/N: 96 dB typ. 4-track independent simultaneous record/play (Recording time: 37 min) Dubbing with 4-track playback Auto &...
  • Page 7 MD4S 3 7 63 1515 0 PANEL LAYOUT Control Panel 5 / 6 7 / 8 GAIN GAIN GAIN GAIN LINE LINE LINE LINE MIC/ MIC/ MIC/ MIC/ LINE LINE LINE LINE REC SELECT FLIP FLIP FLIP FLIP CUE MIX TO STEREO...
  • Page 8 MD4S 3 7 6 3 1 5 1 5 0 Control Panel Rear Panel Top panel connectors MIC/ LINE INPUT 1, 2 terminals INSERT I/O 1, 2 jacks MIC/ LINE INPUT 3, 4 jacks LINE INPUT 5-8 jacks Mono Inputs...
  • Page 9 MD4S 3 7 6 3 1 5 1 5 0 BLOCK DIAGRAM Display MAIN Part Display Title and function display Time counter mode MIDI indicators Track level meters Stereo level meter Pitch indicator Status indicators TOC EDIT indicator Repeat indicator...

  • Page 10: Mixer Part

    MD4S 3 7 6 3 1 5 1 5 0 CIRCUIT BOARD LAYOUT Power transformer Mixer Part SUB 2/3 1 3 9 4 2 2 9 6 5 1 3 MD mechanical unit SUB 3/3 MAIN SUB 1/3 MIX 2/2 (INPUT)
  • Page 11 MD4S 3 7 6 3 1 5 1 5 0 DISASSEMBLY PROCEDURE Bottom Cover SUB 2/3 Circuit Board Remove the twelve (12) screws marked [520A]. Remove the bottom cover. (See Procedure 1.) The bottom cover can then be removed. (Fig. 1)
  • Page 12 MD4S 3 7 6 3 1 5 1 5 0 Shield INPUT MIX2/2 ( INPUT ) [510] [410A] [520K] [520L] [410B] Top cover Support JACK [520J] SUB1/ 3 [410A]: U-shaped Holder MET41-0191 (VI549000) [410B]: U-shaped Holder MET41-0191 (VI549000) (Fig. 5) (Fig.
  • Page 13 MD4S 3 7 6 3 1 5 1 5 0 LSI PIN DESCRIPTION HD6413002F16 (XP691A00) CPU MAIN IC109 CXD2538R (XU964A00) ATRAC MAIN IC203 NAME FUNCTION NAME FUNCTION NAME FUNCTION NAME FUNCTION Power supply (+5 V) VDD1 Power supply VDD2...
  • Page 14 MD4S 3 7 63 1515 0 MD4MC2 (XU849A00) GATE ARRAY MAIN IC101 NAME FUNCTION NAME FUNCTION Ground Ground LWRT Laser power control SA19 CPU address A19 DDATA REC/PLAY data EXTIOAO Extension port A of bit 0 DC2PO C2 Error flag input...

  • Page 15: Ic Block Diagram

    MD4S 3 7 63 1515 0 AK4520A-VF-E2 (XT802A00) DAC & ADC MAIN IC301 NAME FUNCTION NAME FUNCTION VREFH Positive Voltage Reference Input, VA MCLK Master Clock Input VREFL Negative Voltage Reference Input, AGND DEM0 De-emphasis Frequency Select AINR+ Rch Analog Positive Input...
  • Page 16 MD4S 3 7 63 1515 0 TC7S86F1 (XR681A00) M66004SP (XN173A00) Exclusive OR Gate 16 Digit 5 X 7 Sement VFD Controller MAIN IC114 SUB IC801 CS 14 DISPLAY CODE IN B SERIAL SEG00 CGROM REGISTER RECEIVE (35 BITX160) (8 BITX16)
  • Page 17 MD4S 3 7 63 1515 0 EPROM(IC104)REMOVAL AND INSTALLATION Removing the EPROM Insert a sharp tweezers into the gap of socket and lift the one side of EPROM by hooking it. When the one side is raised, insert the tweezers into other gap and lift the EPROM as well.

  • Page 18: Parts List

    MD4S 3 7 6 3 1 5 1 5 0 CIRCUIT BOARDS MAIN Circuit Board to MD MECHA to MD MECHA to MD MECHA to SUB 1/3 - CN801 N.C. N.C. to SUB 2/3 - CN707 - CN102 - CN103...

  • Page 19: Parts List

    MD4S 3 7 6 3 1 5 1 5 0 MIX 1/2 Circuit Board to MIX 2/2 (INPUT) to MAIN - CN110 to SUB 2/3 - CN704 to MAIN - CN108 - CN602 to MIX 2/2 (INPUT) - CN601...

  • Page 20: Parts List

    MD4S 3 7 6 3 1 5 1 5 0 MIX 1/2 Circuit Board 1 3 9 4 2 2 9 6 5 1 3 Pattern side w w w Note : See parts list for details of circuit board component parts.

  • Page 21: Parts List

    MD4S 3 7 6 3 1 5 1 5 0 SUB 1/3 Circuit Board to SUB 2/3 - CN706 SONG SEARCH SONG SEARCH LAST REC LAST REC MARK SEARCH SEARCH SEARCH 1 3 9 4 2 2 9 6 5 1 3...

  • Page 22: Parts List

    MD4S 3 7 6 3 1 5 1 5 0 MIX 2/2 (INPUT) Circuit Board LINE INPUT MIC/LINE INPUT INSERT INSERT to MIX 1/2 to MIX 1/2 to MIX 1/2 to MIX 1/2 - CN104 - CN103 - CN101...
  • Page 23 Song Divide function, or MD4S cannot edit this type of song. This song cannot be copied because it’s copy protected. Can’t Copy The MD4S cannot record over this type of song, so you cannot overwrite this Can’t REC song. The MD4S does not have permission to record in this mode, so you cannot Can’t Rehe...
  • Page 24 MD4S 3 7 63 1515 0 INSPECTION SPECIFICATION 1. Composition 1-4-3. OTHERS KEY EJECT 1-1. INPUTS PEAK HOLD MIC/LINE (XLR) ················· CH1, 2 Balanced DISPLAY MIC/LINE (PHONE) ············ CH1, 2 Balanced PITCH /Unbalanced ADJUST MIC/LINE (PHONE) ··········· CH3, 4 Unbalanced EDIT LINE (L ·...
  • Page 25 [UTILITY] key pressed, the ROM version is u163 displayed as the following. <Check procedure> "MD4S V1.00" Press the [MARK SEARCH > |] key. When "D1 : FL/LED" is displayed, press the [ENTER] key. Confirm that the fluorescent display and the LED display light normally.
  • Page 26 MD4S 3 7 63 1515 0 Press the [MARK SEARCH > |] key. When "D2 : Press the [MARK SEARCH > |] key. When the "D7 SWITCH" is displayed, confirm that all keys are : EXIT" is displayed, press the [ENTER] key.
  • Page 27 MD4S 3 7 63 1515 0 Item Standard Condition Gain between LINE IN and -2.0 +/-2 dBm • INPUT CH3LINE IN : -20 dBm, 1 kHz MONITOR OUT • OUTPUT MONITOR OUT L/R • MONITOR SELECT :STEREO • MONITOR LEVEL Maximum •...
  • Page 28 MD4S 3 7 63 1515 0 Item Standard Condition LINE IN – DIRECT OUT +2.0 +/-2 dBm • INPUT CH3LINE IN : Standard input (BUS) • OUTPUT TRACK DIRECT OUT1 – 4 • CH MASTER FADER Maximum • CUE LEVEL 3 CENTER * Insert the disk, set the REC SELECT at BUS, this sets the REC PAUSE mode.
  • Page 29 MD4S 3 7 63 1515 0 Item Standard Condition Recording reproduction level +/-1.0 dB Within • INPUT LINE INPUT CH1 – 4 : Standard input deflection • OUTPUT TRACK DIRECT OUT1 – 4 • Recording reproduction disk • CH FADER Maximum •...
  • Page 30 MD4S 3 7 63 1515 0 Date : 11 02 1998 YAMAHA [Multitrack Recorder] Version : 1.0 MIDI Implementation Chart Model : MD4S Transmitted Recognized Remarks Function... Basic Default Channel Changed Default Mode Messages ************** Altered Note ************** Number...

  • Page 31: Contents

    http://www.xiaoyu163.com 3 7 63 1515 0 MULTITRACK MD RECORDER PARTS LIST CONTENTS OVERALL ASSEMBLY ······················································································································· 2 L 13942296513 MD MECHANICAL UNIT ···················································································································· 3 ELECTRICAL PARTS··················································································································· 4~16 Notes : DESTINATION ABBREVIATIONS : Australian model M : South African model : British model O : Chinese model C : Canadian model Q : South-east Asia model...
  • Page 32 MD4S 3 7 63 1515 0 OVERALL ASSEMBLY 10a-1 10a-4 10a-1 10a-5 10a-2 10a-3 10a-3 10a-4 10a-6 L 13942296513 10a-5 10a-1 410 240 u163 http://www.xiaoyu163.com...

  • Page 33: Http://Www.xiaoyu163.Com 8 9

    3 7 6 3 1 5 1 5 0 PART NO. DESCRIPTION REMARKS PART NO. DESCRIPTION REMARKS REF NO. RANK REF NO. RANK OVERALL ASSEMBLY MD4S J (V291320) VZ626700 AC Cord 7A 125V 1.8m OVERALL ASSEMBLY MD4S U,C,V (V291330) V2998900 AC Cord UC 7A 2.0m SPT-2 U,C,V...
  • Page 34 MD4S 3 7 6 3 1 5 1 5 0 ELECTRICAL PARTS PART NO. DESCRIPTION REMARKS PART NO. DESCRIPTION REMARKS REF NO. RANK REF NO. RANK ELECTRICAL PARTS MD4S C226 UB051100 Monolithic Ceramic Cap. (chip) SL 10P 50V D...
  • Page 35 MD4S 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS REF NO. RANK C529 UB051220 Monolithic Ceramic Cap. (chip) SL 22P 50V J C530 UB051100 Monolithic Ceramic Cap. (chip) SL 10P 50V D C531 VV020100 Electrolytic Cap. 220.00 10.0V...
  • Page 36 MD4S 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS REF NO. RANK R107 RD254100 Carbon Resistor (chip) 10.0 0.1 J R108 RD256680 Carbon Resistor (chip) 6.8K 0.1 J R109 RD256220 Carbon Resistor (chip) 2.2K 0.1 J R110 RD254270 Carbon Resistor (chip) 27.0 0.1 J...
  • Page 37 MD4S 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS REF NO. RANK R236 RD258100 Carbon Resistor (chip) 100.0K 0.1 J -238 RD258100 Carbon Resistor (chip) 100.0K 0.1 J R239 RD256560 Carbon Resistor (chip) 5.6K 0.1 J R240 RD256560 Carbon Resistor (chip) 5.6K 0.1 J...
  • Page 38 MD4S 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS REF NO. RANK R506 RD257470 Carbon Resistor (chip) 47.0K 0.1 J R507 RD257470 Carbon Resistor (chip) 47.0K 0.1 J R509 RD257300 Carbon Resistor (chip) 30.0K 0.1 J R510 RD257470 Carbon Resistor (chip) 47.0K 0.1 J...
  • Page 39 MD4S 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS REF NO. RANK R604 RD255220 Carbon Resistor (chip) 220.0 0.1 J VB966900 Style Pin IMSA-6024 L=35 SW101 VZ587700 Push Switch SPPH43001A MIC/LINE PB 1 SW102 VZ587700 Push Switch SPPH43001A...
  • Page 40 MD4S 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS REF NO. RANK C715 UR868220 Electrolytic Cap. 220.00 50.0V C716 FG644100 Ceramic Capacitor-F 0.0100 50V Z -719 FG644100 Ceramic Capacitor-F 0.0100 50V Z C720 VZ302300 Electrolytic Cap. 15000/16V VT439600 Monolithic Ceramic Cap.
  • Page 41 MD4S 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS REF NO. RANK JK702 VZ662100 DIN Connector MIDI IN/OUT/THRU JK703 V2346200 Pin Jack T6552 BL 4P DIRECT OUT 1 2 3 4 JK704 VY695400 Phone Jack YKB21-5244 (BL) AUX SEND 1...
  • Page 42 MD4S 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS REF NO. RANK R824 HF756240 Carbon Resistor 2.4K 1/4 J R825 HF756390 Carbon Resistor 3.9K 1/4 J R826 HF756560 Carbon Resistor 5.6K 1/4 J R827 HF757130 Carbon Resistor 13.0K 1/4 J...
  • Page 43 MD4S 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS REF NO. RANK C112 VJ898700 Monolithic Ceramic Cap. (chip) CK 2P 50V C C113 UB445100 Monolithic Ceramic Cap. (chip) 0.100 16V Z C114 UB013100 Monolithic Ceramic Cap. (chip) B 1000P 50V K...
  • Page 44 MD4S 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS REF NO. RANK C342 UB445100 Monolithic Ceramic Cap. (chip) 0.100 16V Z C343 UG037100 Electrolytic Cap. (chip) 10 16V C344 UG037100 Electrolytic Cap. (chip) 10 16V C345 UB445100 Monolithic Ceramic Cap. (chip) 0.100 16V Z...
  • Page 45 MD4S 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS REF NO. RANK R110 RD256680 Carbon Resistor (chip) 6.8K 0.1 J R111 RD250000 Carbon Resistor (chip) 0.0 0.0 J R112 RD258100 Carbon Resistor (chip) 100.0K 0.1 J R113 RD258100 Carbon Resistor (chip) 100.0K 0.1 J...
  • Page 46 MD4S 3 7 63 1515 0 PART NO. DESCRIPTION REMARKS REF NO. RANK R333 RD258100 Carbon Resistor (chip) 100.0K 0.1 J -340 RD258100 Carbon Resistor (chip) 100.0K 0.1 J R341 RD257100 Carbon Resistor (chip) 10.0K 0.1 J R342 RD257100 Carbon Resistor (chip) 10.0K 0.1 J...

  • Page 47: Parts List

    MD4S MD4S OVERALL CIRCUIT DIAGRAM 1/2 ( MAIN,SUB1/3,SUB3/3 ) NC ( TEST ) MAIN NC ( TEST ) Photo Coupler to MIX 1/2-CN105 OP AMP 6.8K INVERTER to SUB 2/3 -CN707 MULTIPLEXER MULTIPLEXER to SUB 3/3-CN705 INVERTER OP AMP DAC &...

  • Page 48: Parts List

    MD4S MD4S OVERALL CIRCUIT DIAGRAM 2/2 ( MIX1/2,MIX2/2 ,SUB2/3 ) ( INPUT ) MIX 1/2 OP AMP 6.8K OP AMP OP AMP OP AMP OP AMP OP AMP OP AMP 6.8K 6.8K OP AMP OP AMP OP AMP to SUB3/3-CN902...

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