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Yamaha SPX50D, Service Manual

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Yamaha SPX50D Service Manual Download Page 4

Summary of Contents for SPX50D

Page 1: ... y Y T A 6 DIMENSIONS H 6 LSI DATA TABLE LSliffi 7 1C BLOCK DIAGRAM 1C yn y m 10 CIRCUIT BOARDS 12 DISASSEMBLY PROCEDURE 16 TEST PROGRAM y hynyyA 19 CHECKS 22 ADJUSTMENTS H 24 ERROR MESSAGES c7 y y tz y 24 MIDI DATA FORMAT MIDI y y y v y h 25 MIDI IMPLEMENTATION CHART 27 PARTS LIST 006865 YAMAHA GORP HAMAMATSU JAPAN 2 64K 313 Printed in Japan 88 6 ...

Page 2: ...herefore 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 buss in the unit heavy gauge black wires...

Page 3: ...r y I 7 n A 50fI No 1 50 a xyp A 50 M No 5l l00 7 P h y JP 7 Y y POWER ON OFF 7 7 5 INPUTUr pri 1 p p T Y yuY ATlU JP 7 Y LED 30 0 y E J No 7 b F 2 4ftLED yP7 7A 7 7 y t 7 ley 2 ISLCD FRONT PANNEL Keys Display Input Level Monitor Knob Jack T i MEMORY PARAMETER STORE RECALL COMPARE INSERT UTILITY REV DLY Group MOD OTHERS DIST Group TRIGGER BYPASS 16 char x 2 lines LCD 2 digit 7 segment LED 7 segmen...

Page 4: ... DLY Group MOD OTHERS DIST Group TRIGGER Button BYPASS Button TUNER OUT Jack INPUT Jack O POWERxT y INPUT h a Ji INPUTU u7 7 O 7 j No 7 LCD MEMORY PARAMETERa R STORE RECALL COMPARE INSERT UTILITY 1 7 h J 3 REV DLY Groups MOD OTHERS DIST Group TRIGGER BYPASS TUNER OUTST INPUTST O MIDI THRU Connector MIDI IN Connector BYPASS FOOT SW Jack O MEM TRG FOOT SW Jack R L OUTPUT Jacks INSERT IN and OUT Jack...

Page 5: ...SPX50D ...

Page 6: ......

Page 7: ...52 SH2 0 Sample hold signal 2 0 Outputs serial data of phase delay Mode 2 Switch sel signal 21 DD02 0 for DIN 1 2 Mode 4 De glitch signal 3 22 DAOVC PRIN 1 Over flow control terminal for DA 53 54 ASW1 ASW2 0 0 1 Outputs switch select signal GND OFF 5V ON or PRCN 5V Initialization of 55 REG2 0 Eor test enable signal of randam number resister 2 23 PRCN 1 For test at 5V initialization of 56 MPX1 0 Fo...

Page 8: ... 32 P67 I O 64 E 0 Enable HD63B50P IG1 47300 Asynchronous Communications Interface Adapter PIN NO NAME I O FUNCTION PIN NO NAME I O FUNCTION 1 Vss DC supply OV 13 R W 1 Read Write 2 Rx Data 1 Receive data 14 E 1 Enable 3 Rx CLK 1 Receive clock 15 D7 I O 4 Tx CLS O Transmit clock 16 D6 I O 5 rTs I O Request to send 17 D5 I O 6 Tx Data 0 Transmit data 18 D4 I O Data bus 7 IRQ 1 Interrupt request 19 ...

Page 9: ...t terminal CD counter reset CD data output terminal CD data input terminal Unconditionally outputs the 15th bit of the Address Shift Register Three state Memory which needs refreshing Three state Connect to memory OE Three state Memory read write signal Three state DRAM control Three state signal Data bus MOD data input terminal Initial clear Chip enable Master clock input terminal Nnput for gener...

Page 10: ...C14N IR001450 Hex Inverter SN74HC32N IR003250 Quad 2 Input OR Vcc 46 4A 4Y 3B 3A 3Y SN74HC174IM IR017450 Hex D Type Flip Flop SN74HC74N IR007450 Dual D Type Flip Flop SN74HC139N 1R013950 Dual 2 to 4 Demultiplexer SIM74HC245N IR024550 Octal 3 State Bus Transceiver SIM74LS266P XA379001 Quad 2 Input O C Ex NOR 10 ...

Page 11: ...perational Amplifier do Z1 Commons OUT IN 2 Switches IN OUT 20 Control Inhibit DC Voltage Supply do Output A Inverting Input A Non Inverting Input A DC Voltage Supply DC Voltage Supply Output B Inverting Input B Non Invert if g input B IR9311 IG1 34900 Comparator y GISJD 0 f VCC VIN 1 Ss VOUT VIN Ml VEE N2 r 11 ...

Page 12: ...th sides of it slightly T 3X8 i 7 jl Ltt Fig 1 0S S to 2 Removal of AD Circuit board Remove the Top cover Refer to 1 Remove the 4 screws 3 x 8 bind head screw Refer to Fig 2 After the 3 screws 3x8 bind head screw have been removed the AD circuit board can be raised Refer to Fig 3 2 AD h L to 1 t 3X8 4 Ktt 4 Li to Fig 2 0S 3 X 8 y 3 Ltto Fig 3 HB AD F S IXtbL to Fig 2 16 ...

Page 13: ...which located on the bottom side of the unit and take the Front panel out of the unit Refer to Fig 4 4 1 Removal of FP1 4 circuit board Disconnect 2connectors on the AD circuit board and take the FP1 4 circuit board out of the unit 4 2 Removal of FP2 4 circuit board Remove the 2 hexagonal nuts 9 which locat ed on the right side of the sub chasis Refer to Fig 5 Disconnect a connector on the AD circ...

Page 14: ...uit board out of the unit 4 3 FP3 4 T 3 X 8 i 2 AD FP3 4 h L Fig 5 0S 4 4 FP4 4 INPUT LEVELiO y 5 eni y F 0 7 Fig 5 AD F 7 9 L FP4 4 FP3 4 Circuit Board 0 FP1 4 Circuit Board Q OV r fi lU LI 1 I 1 JUU 1 M IfT Tfm o 1 1 i nnn n _U iQ FP4 4 CircuitBoard LCD Circuit Board FP2 4 Circuit Board Fig 5 5 Removal of the LCD circuit board Remove the Top cover and Front panel Refer to 1 4 Remove the 2 screws...

Page 15: ...be restored regardless of the completion of the tests 1 TEST1 LCD Check 1 Select the test number 1 and press the RECALL switch to initiate the test 2 The entire LCD is turned ON and OFF five times 3 Verify proper lighting of all dots in the LCD 2 TEST 2 LED Check 1 Select the test number 2 and press the RECALL switch to initiate the test 2 The 7 segments LED will indicate figures of 0 to 99 in seq...

Page 16: ...RAMETER 02 STORE 03 RECALL 04 COMPARE 05 REV DLY 06 INSERT 07 MOD 09 UTILITY 10 DIST 11 TRIGGER 12 BYPASS FI FOOTSW BYPASS F2 FOOTSW MEM TRG 4 When these tests have been completed successfully an OK message will appear on the LCD 5 If an incorrect switch is pressed an error message NG will appear on the LCD Press the RECALL switch to return the routine to the procedure 2 And press the switches aga...

Page 17: ...switch and press the T or i switch to select other routine 6 TEST 10 17 DRAM CHECK 1 Selectthe test number 1 0 through 17 and press the RECALL switch to initiate the test The LCD will indicate a message as sho wn below 3 AD AVR102 ij y 5 TESTS ij ro fe yxT V U rx h 5 iRECALLi DIAGNOSTICS V PRESTET USER PRG 3 2 STOREXT J No 51 100 ij i No l Ij 3 h tlo 6 TEST 10 17 DRAM 5 X a rX H0 17 jlfj L recall ...

Page 18: ...ments must be over 1 Mohms 2 INSPECTIONS 2 1 Gain When a input signal of 1 6 0dBm at 1 kHz is applied to the INPUT connector output signals of 6 0 1 dBm will be obtained at the OUTPUT L and R conne ctors 2 2 Frequency Characteristics When an input signal of 30dBm is ap plied from the INPUT connector the fre quency characteristics of the OUTPUT L and R connectors are within the range listed in the ...

Page 19: ...1 and adjust the input level to obtain a signal of 13 3 dBm at the OUTPUT connector L the 0 level of the level meter is illuminated At this point all level except 0 are illu minated When the input is opened all level LED are turned out 2 6 Muting Circuit After the POWER switch is turned ON muting iseffectiveforthreeorfourseconds and no output signals are generaed After this time delay output signa...

Page 20: ...rs for mininum distortion And adjust VR103 so that the output signals of the L and R OUTPUT connectors be come 5 5 0 5dBm 2 2 When the INPUT is opened the noise le vels of the L and R OUTPUT connectors should be less than 86dBm If noise levels are not within rated levels adjust VR 1 02 so that the noise levels are within rated values ERROR MESSAGES EO ROM sum check error El RAM CPU s read write er...

Page 21: ...s set to OFF STATUS 1001nnnn 9nH n 0 channel no Il ls channel no 16 NOTE NO Okkkkkkk k 0 C 2 127 G8 VELOCITY Ovvwvw v 0 127 NOTE OFF Although this message causes no direct act ion in the SPX50D it is essential to signal the end of a NOTE ON message The conditions for NOTE OFF message reception are the same as for NOTE ON reception as described ab ove STATUS lOOOnnnn 8nH n 0 channel no 1 15 channel...

Page 22: ... 31 Pitch A X y tz i L BASE KEYc7 N y fOFF Ei oT tSfg L yy y 7 lOOInnnn 9nH n 0 I 15 5 V Vys 16 y hNo Okkkkkkk k 0 C 2 127 G8 Ovvwvw v 0 127 y vty zcoy oT ii p 4 f F t y y b ywi g hl t Ci o yy yy 1000nnnn 8nH n 0 i r I i5 5 v TyL Thwi ie y FNo Okkkkkkk k 0 C 2 l27 G8 ovvwvw v 0 127 7 p y 7U x V j MIDI j y yvx Sm HgT to y yycy 7 Dy 7Af i y i h tT yy yy lOOOnnnn CnH n 0 5 v 71 I 15 T 7U F y 1 7 ny v...

Page 23: ...locity Note ON X Note OFF X After Key X Touch Ch s X Pitch Bender X X Control Change Prog o 0 127 2 Change True System Exclusive x System Song Pos x Song Sel x Common Tune x System Clock x Real Time Commands x Aux Local ON OFF X All Notes OFF X Mes Actlve Sense X sages Reset X Notes 1 Note ON OFF is recognized only change and trigger on for pitch 2 For program 1 128 memory 1 selected 100 is Mode 1...

Page 24: ...uctive Cera Cap Marked t 0 1 iF 16V H FZ004170 9 Ceranic Resonator X201 4M CSA4 00MG QU004800 L201 206 FL5R200BNT VB835000 20 iH RY301 DC RZ 12 12V KC001300 2 o mSF o 4 L 0 ici lOy Jt 1 orirt 0 304 2SCI8I5 12 Lithium Battery CR2032 P5 2 VB436900 Transceiver TT 8 02 7 D3 6 04 5 05 4 06 3 07 2 A2 AI C J J 1 DAO 12 DA 1 13 DA2 14 DA3 15 DA4 16 DAS 17 DA6 16 DA7 20 t t5 10 m Tw4a 4 N DA IN AD OUT Q 20...

Page 25: ...A TC5565L 12 15 IG148500 RAM MBM27C512 XF035A00 OTPR SN74HC02N IR000250 NOR SN74HC74N IR007450 D FF HD74LS266P XA379001 EX NOR PST518A IG124300 RESET SN74HC14N IR001450 INVERTER SN74HC139N IR013950 DECODER SN74HC32N IR003250 OR SN74HCU04N IG142250 INVERTER HD6303Y XE386A00 CPU SN74HC245N IR024550 TRANSCEIVER SN74HC174N IR017450 D FF 2 Photo Coupler IC209 3 Transistor DT201 202 0101 0102 301 302 01...

Page 26: ...rcuit Board FP VE981900 XE325B0 1 1C IC401 IR2E19 IG136600 LED DRIVER 2 Diode 1 SSI 33 IF003450 3 LED LED401 407 LN242RP RED VA262300 SW indicators LED408 LN524RKS VA026000 MEMORY display LED409 41 5 SX 25K VA902500 Meter 4 Variable Resistor A10K EWH 14A VA757600 INPUT LEVEL 5 Push Switch KHH10908 KA907030 4 15 PW Circuit Board Notes Circuit Board 1 1C IC501 IC502 IC503 2 Diode D503 505 3 Semicond...

Page 27: ...ARTS LIST Notes DESTINATION ABBREVIATIONS J Japanese model A Australian model U U S A model E European model C Canadian model D West German model X General model B British model M South African model 1 Indonesian model H North European model ...

Page 28: ...L313680 HZ002870 1IZ004730 V A069700 Trimmer Potentiometer Hetal Oxide Film Resistor Resistor Array Res i stor Array B50X 3P EVH 6 8Q IV J RHLS4 RHLS8 103J RHI S4 472J LSI S V R m m i iK 7 L f ik 7 y IR 4a 7 1 Y 01 01 01 02 01 VD303500 VB835000 FZ004170 QU004800 KCOO 1 300 LC F i 1 ter Coil Se i con due t i ve Cera Cap Ceramic Resonator Relay TFB 3D FL5R2000HT 0 1 ti F 16V H 4H CSA4 00HG DC RZ 12 ...

Page 29: ...s New Part NR y y Japan only 2 ...

Page 30: ...SPX50D ...

Page 31: ...X 7 3 V UTIL ITY D 1ST Group TRIGGER BYPASS 1 21 0 22 0 23 24 25 VF065000 VF452600 VF065400 VE981700 VE981900 Escu tcheon Escutcheon LCD Assembly C i rcu i t Board Circuit Board W L 16X2 AD FP SWXX 7 3 y SWXX 7 3 LCD A S S Y A D b F P b POWER SV 02 17 52 16 25 1 25 2 25 3 25 4 26 VE985200 C i rcu i t Board Circuit Board Circuit Board C i rcu i t Board C i rcu i t Board FP 1 4 FP 2 4 FP 3 4 FP 4 4 ...

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