The provided context does not mention a fuse in the Technics SX-PR903B piano. Additionally, it does not specify whether the power button can be replaced.

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Summary of Contents for Technics SX-PR903B

Page 1 ORDER NO. EMID0008034A0 Digital Ensemble SX-PR903B Colors (B) Polish ebony Type Area (P) U.S.A. (PC) Canada (EZ) Germany (EG) Switzerland, Austria, France (EB) the United Kingdom (GN) Australia, New Zealand Please file and use this manual together with the service manual for Model No.
Page 2 88 KEYS KEYBOARD SOUND GENERATOR 64 NOTES MAX. POLYPHONY SOUNDS NUMBER OF SOUNDS: 1009 SOUNDS + 33 DRUM KITS + 2 DIGITAL DRAWBARS PIANO GROUP: GRAND, UPRIGHT, ELECTRIC, MODERN SOUND GROUP: GUITAR & HARPSI, STRINGS, BRASS,VOCAL, SAX & WOODWIND, ORGAN & ACCORDION, SYNTH, MALLET &...
Page 3 MODE: BASIC, ADVANCED 1, AUTO PLAY CHORD ADVANCED 2, PIANIST ON BASS, CHORD FINDER, LEFT HOLD Supported MUSIC STYLE ARRANGER Supported SOUND ARRANGER Supported PIANO STYLIST Supported ONE TOUCH PLAY Supported TECHNI-CHORD 3 BANKS × 8, SET, NEXT PANEL MEMORY BANK, BANK VIEW SEQUENCER 16 TRACKS...
Page 4: Replacement Parts List
Supported DEMO PHONES × 2, LINE OUT (R/R+ TERMINALS L,L), AUX IN (R/R+L,L), COMPUTER, MIDI (IN, OUT, THRU), PEDAL IN Supported (MIC REVERB & MIC INPUT EFFECT) 240 W (120 W × 2) OUTPUT 20 cm × 2, 6.5cm × 2, MONITOR SPEAKERS SPEAKER ×...
Page 5: Top Cover Ass'y
*ACHTUNG: Die lasereinheit nicht zerlegen. Die lasereinheit darf nur gegen einc vom hersteller spezifizierte einheit ausgetauscht werden. *Capacity values are in microfarads (uF) unless specified otherwise. P=Pico-farads (pF), F= farads (F) *Resistance values are in ohms, unless specified otherwise. 1K=1,000 (OHM), 1M=1,000K (OHM) *The marking <RTL>...
Page 6 Ref. No. Part No. Part Name & Description Remarks QKAG0008AA THUMB SCREW QMBG009AA SPRING QMFG1133AA FELT QMFG1134AA FELT QMWG4002AA PEDAL ARM QMFG1135AA FELT QHDG032AB SCREW WITH WASHER XTB3+10AFZ SCREW XTS3+12AFZ SCREW XTS3+10AFZ SCREW XTT4+10A SCREW XTB4+10B SCREW XTT4+12AFZ SCREW XTT4+14A SCREW XYN4+F16FZ SCREW...
Page 7 Ref. No. Part No. Part Name & Description Remarks QGKG0096AD AC IN PANEL (S) / P EZ EB EG GN K2A2G000003 AC IN SOKET (S)EXCEPT P SJS9334A AC IN SOKET (S)P ONLY QMRG7029AC BRACKET QMRG7028AC BRACKET QGKG0076FB JACK GRILL SBNG4010A VOLUME KNOB QKAG0012AA FOOT...
Page 8 XTW3+10T SCREW Ref. No. Part No. Part Name & Description Remarks QGUG1040AA BUTTON POWER QGPG0139BB END COVER PANEL LEFT QGPG0138BB END COVER PANEL RIGHT QMFG1104AA FELT QMWG1041AA WHITE KEY(FIRST OCT A KEY QMWG1042AA WHITE KEY(B KEY) QMWG1043AA WHITE KEY(C KEY) QMWG1044AA WHITE KEY(D KEY) QMWG1045AA...
Page 9: Cabinet Parts Location
Ref. No. Part No. Part Name & Description Remarks PCB4 SXPG229821B ASUB P.C.B. PCB5 SXPG229621A CPL P.C.B. PCB6 SXPG229751A CPR P.C.B. PCB7 SXPG229611C INVL P.C.B. PCB8 SXPG229911 JACK P.C.B. PCB9 SXPG218211 PKB P.C.B. PCB10 SXPG231111A MKB1 P.C.B. PCB11 SXPG231111B MKB2 P.C.B. PCB12 SXPG230511 ACP P.C.B.
Page 12 4. PACKAGING...
Page 13 / Printed in Japan / S000900000 HM/AM...
Page 14 ORDER NO. EMID0006011C0 Digital Ensemble SX-PR903C (P) U.S.A., Mexico (PC) Canada (EX) Norway, Sweden, Denmark, Finland, Spain, Portugal, South Africa (EF) France (EZ) Germany (EG) Switzerland, Italy, Austria, Holland, Belgium (EB) the United Kingdom (GN) Australia, New Zealand (XS) Malaysia, Singapore (XT) Taiwan (X) Thailand, Columbia, Panama, Chile, Brazil, Philippines, Venezuela, Ecuador...
Page 15 SPECIFICATIONS 88 KEYS KEYBOARD SOUND GENERATOR 64 NOTES MAX. POLYPHONY SOUNDS NUMBER OF SOUNDS: 1009 SOUNDS + 33 DRUM KITS + 2 DIGITAL DRAWBARS PIANO GROUP: GRAND, UPRIGHT, ELECTRIC, MODERN SOUND GROUP: GUITAR & HARPSI, STRINGS, BRASS,VOCAL, SAX & WOODWIND, ORGAN & ACCORDION, SYNTH, MALLET &...
Page 16 MODE: BASIC, ADVANCED 1, AUTO PLAY CHORD ADVANCED 2, PIANIST ON BASS, CHORD FINDER, LEFT HOLD Supported MUSIC STYLE ARRANGER Supported SOUND ARRANGER Supported PIANO STYLIST Supported ONE TOUCH PLAY Supported TECHNI-CHORD 3 BANKS × 8, SET, NEXT PANEL MEMORY BANK, BANK VIEW SEQUENCER 16 TRACKS...
Page 17 Supported DEMO PHONES × 2, LINE OUT (R/R+ TERMINALS L,L), AUX IN (R/R+L,L), COMPUTER, MIDI (IN, OUT, THRU), PEDAL IN Supported (MIC REVERB & MIC INPUT EFFECT) 240 W (120 W × 2) OUTPUT 20 cm × 2, 6.5cm × 2, MONITOR SPEAKERS SPEAKER ×...
Page 18: Safety Precaution
electric switch, electrical cord, noise-prevention condenser, etc.), wind the lead wire and secure it by soldering. 5. Do not let the wiring come into contact with heat-emitting devices (fuse resistor, radiator plate, etc.). 6. When replacing the wiring, make sure that it is not in contact with the unfinished or rough edge of a part.
Page 19 jumper wire. 2. Turn on the power switch. 3. Measure the resistance value with an ohmmeter between the jumpered AC plug and each exposed metal cabinet part, such as screw heads, connectors, control shafts, handle brackets, etc. Measurements should range from 4 M Ohm to infinity for allexposed parts.
Page 20 3. Place the stand upright and mount the pedal box unit to the speaker box - Place the stand upright and mount the pedal box unit to the speaker box with 4 brass-colored screws and 2 short block screws. - And lay the pedal cord in the groove on the support (left), and then set 2 cord covers in right and left grooves.
Page 21: Keyboard Ranges
5. Connect the pedal cord, speaker cord and power cord - Connect the pedal cord and power cord to the terminals located on the rear of the piano unit as shown below. Figure-6 5. KEYBOARD RANGES This keyboard features Touch Response, by which you control the volume by playing the keys harder or softer.
Page 22 Figure-9 7. DISASSEMBLY INSTRUCTIONS 7.1. Removing the top cover 1. Remove the top cover mounting screws (A × 4 pcs.) as shown in Figure-11 2. Slide the top cover forward and lift up (as shown by the arrows). 7.2. Removing the keyboard cover 1.
Page 23 4. Match the gears of the keyboard cover with the notches in the guide rail, and lift up the keyboard cover as shown in Figure-11 Figure-10 7.3. Removing the control panel 1. Remove the keyboard cover (see step “Removing the keyboard cover ”).
Page 24 bottom of the cabinet (A × 10 pcs.) as shown in Figure-12 Figure-12 7.5. Key(s) Disassembly 1. Remove the keyboard assembly (see step “Removing the keyboard assembly ”). 2. While inserting a thin plate to press down a claw, push the rear of the key forward to disengage the key claw from the chassis.
Page 25 3. While slowly lowering the key into the chassis, insert the plate spring into the notch at the rear of the key. 4. Carefully insert the key into the opening in the chassis and slide the key towards the rear to lock it in place. Figure-14 7.6.
Page 26 1. Remove the pedal box unit (see step “Removing the pedal box unit ”). 2. Remove the rear panel mounting screws (C × 4 pcs. and D × 8 pcs.). 3. Remove the 20 cm speaker mounting screws (E × 4 pcs.). 4.
Page 27 keyboard assembly ”). 2. Remove the HP P.C.B. mounting screws (G x 2 pcs.) 3. Remove the headphone jack mounting nuts (H x 4 pcs.). ACP P.C.B. - Release the claws of the AC IN connector bracket. 7.10. Removing the Disk Drive unit 1.
Page 28 Figure-17 7.12. Removing the LCD, INVL P.C.B. - Remove the control panel (see step “Removing the control panel ”). LCD P.C.B. - Remove the LCD P.C.B. mounting screws (A x 6 pcs.). INVL P.C.B. 1. Release the claws of the 3 P.C.B. holders. 2.
Page 29 7.13. Removing the CPL, CPR P.C.B. - Remove the control panel (see step “Removing the control panel CPR P.C.B. 1. Remove the CP mount bracket (A x 2 pcs., B x 2 pcs.). 2. Remove the CPR P.C.B. mounting screws (C x 15 pcs.). CPL P.C.B.
Page 30 3. Use the PAGE button below the display to select the respective test. Figure-21 8.1. ROM device test Figure-22 - Press the EXECUTE button to begin the test. - The test result (OK or NG) is displayed within a few seconds. If the test result is NG, not only the respective IC, but a break or short circuit in the ADDRESS/DATA BUS as well as in any of the strobe signal lines may be the cause ofthe failure.
Page 31 - Press the EXECUTE button to begin the test. - The test result (OK or NG) is displayed within few seconds. If the test result is NG, not only the respective IC, but a break or short circuit in the ADDRESS/DATA BUS as well as in any of the strobe signal lines may be the cause ofthe failure.
Page 32 - Insert a formatted floppy disk into the Disk Drive. Press the START button to begin the test. - The test is carried out repeatedly. Data is saved and loaded, and then the two data sets are compared. The number of times that the test results in OK or NG are counted and displayed on the LCD.
Page 33 LCD. (If a switch is defective, nothing is shown.) - To light all the LEDs, press and hold the DEMO button. If an LED fails to light, the LED may be defective or there may be a break in the surrounding circuit. 8.6.
Page 34 - The operation status of each input action part can be confirmed. If the part is operating properly, “OK” is shown, excluding the Sustain Pedal. - When a keyboard key is pressed, the corresponding pitch and velocity are displayed (only as long as the key is depressed). - The respective statuses for other input action parts are displayed.
Page 35 8.9. WAVE ROM test Figure-30 - Press the EXECUTE button to start the test. - The test result (OK or NG) is displayed within thirty seconds. If the test result is NG, not only the respective IC, but a break or short circuit in the ADDRESS/DATA BUS as well as in any of the strobe signal lines may be the causeof the failure.
Page 36 generator ROM corresponding to the key position is defective. 2. For confirming the output pathway from the sound generator. (Fixed scale, no touch) The Lch and Rch sound outputs are confirmed separately. 3. Generate a full amplitude sine wave in the pitch of each key +2 octaves.
Page 37 9.2. Notes on replacing FLASH ROMs The replacement parts include a FLASH ROM with a available memory and the PROGRAM DISKs which contains the program to be written into the PROGRAM ROM. After replacing the PROGRAM ROM, always write the program into it from the PROGRAM DISKs includedin the replacement parts.
Page 38: Precautions Before Servicing
4. In next FLASH MEMORY UPDATE screen, confirm the procedure and push [*UPDATE*] button again. 5. In next <PROGRAM VERSION INFO> screen, confirm the version at “NOW(CURRENT) =“ column is “Ver F.F.” If the version to update from disks is latest, proceed to update by [*UPDATE*] button.
Page 39 10.2. Important safety notice - Components identified by a mark have special characteristics important for safety. - When replacing any of these components, use only manufacture’s specified parts. 10.3. Symbolic marks The symbolic marks for resistors and capacitors which used in this circuits are classified as following Table-1 Table-2...
Page 40: Specification
SYMBOL SPECIFICATION TYPE Non-Polarized Electrolytic ECEA_KN_type Capacitors Non-Polarized Electrolytic (for ECEA_Y_type Network system) Tantalum Solid Electrolytic ECS_type Capacitors Metallized Plastic Film Capacitors ECQV_type (TF Series) Temperature Compensating ECC_type Ceramic Capacitors High-Dielecytric Constant Ceramic ECK_type, ECR_type Capacitors Axial Lead Ceramic Capacitors ECB_type Metallized Polyester Film ECQ_EW_type...
Page 41 11.2. Measuring condition of AS P.C.B. Check Point 3 - 8 Set to the Self-diagnostic Mode followings. - While pressing two E keys simultaneously, turn on the power switch. - SOUND : SOUND EXPLORER - MAIN VOLUME: Max. - Keyboard: A1 Check Point 1 Set to the Initial mode (refer to “OWNERS MANUAL...
Page 42 12. SCHEMATIC DIAGRAM 13. PRINTED CIRCUIT BOARD 14. BLOCK DIAGRAM 15. WIRING CONNECTION DIAGRAM 16. REPLACEMENT PARTS LIST Notes: *Important safety notice: Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fire-retardant (resistors), high-quality sound (capacitors), low-noise (resistors), etc.
Page 43 check those indications in the Remarks. Ref. No. Part No. Part Name & Description Remarks QMFG1083AB FELT SBLG7-2 STAY QYAG1047AAZ MUSIC STAND SBHG5003-2 HINGE QKQGA134BAZ TOP COVER ASS'Y QMFG1221AA FELT QMFG1222AA FELT SGBG160B BADGE QKQGF035AAZ KEY BOARD COVER ASS'Y QGKG0095AA ORNAMENT QMFG1258AA FELT...
Page 44 Ref. No. Part No. Part Name & Description Remarks QHDG004AA SCREW XTT4+25AFZ SCREW XYN4+F20FZ SCREW XYE3+FG12 SCREW QMRG1029AA CORD CLAMPER QGUG1202BC BUTTON QGUG1205BC BUTTON QGUG1201CC BUTTON QGUG1204CC BUTTON QGUG1207BC BUTTON QGUG1463AB BUTTON QGUG1202CB BUTTON QGUG1440AB1K BUTTON QMRG5234AA CUSHION QGUG1462AB BUTTON QGUG1461AB BUTTON QGUG1468AA...
Page 45 Ref. No. Part No. Part Name & Description Remarks SBNG7050A KNOB QGUG3002BB DIAL WHEEL QKWG033AB LCD PANEL QLZG017A CORE QLZG021A CORE QTPG1N025A POWER TRANSFORMER EXCEPT P PC QTPG1N026A POWER TRANSFORMER P PC ONLY EDMMR63B0F QQLG174AA HP MIC LABEL QYKG278AAZ CABINET ASS'Y QEXGRA01007K EARTH WIRE QMFG4103AA...
Page 46: Key Guide
QMWG9027AA HAMMER(BLACK KEY) Ref. No. Part No. Part Name & Description Remarks QMWG9027AB HAMMER(BLACK KEY) QMWG9027AC HAMMER(BLACK KEY) QMWG9027AD HAMMER(BLACK KEY) QMWG9025AA HAMMER(WHITE KEY) QMWG9025AB HAMMER(WHITE KEY) QMWG9025AC HAMMER(WHITE KEY) QMWG9025AD HAMMER(WHITE KEY) QMGG060AA RUBBER CAP(HAMMER) QMWG8045AA KEY GUIDE QMWG8041AA FUL CU RUM(4 PCS ON ONE) QMWG8040AA FUL CU RUM(12 PCS ON ONE)
Page 47 Ref. No. Part No. Part Name & Description Remarks ECUV1C224KBX 0.22UF MAIN QCBG1H473ZFA 0.047UF JACK2 ECCR1H101J 100PF ECCR1H221J5 220PF JACK ECCW3F180JGE 18PF INVL ECEA0JKS101 100UF 6.3V ECOS1JP103EB 100000UF 63V ECUV1H104ZFX 0.1UF MAIN QCBG1H104ZFA 0.1UF JACK2 ECEA0JKA331Q 330UF 6.3V ECEA0JKA331Q 330UF 6.3V ECEA1HKN010 1UF 50V JACK2...
Page 48 Ref. No. Part No. Part Name & Description Remarks ECUV1H104ZFX 0.1UF MAIN ECA1CM101B 100UF 16V ECUV1H104ZFX 0.1UF MAIN ECCR1H100D5 10PF ECUV1H104ZFX 0.1UF MAIN ECCR1H100D5 10PF ECUV1H104ZFX 0.1UF MAIN ECUV1H030CCN MAIN QCBG1H104ZFA 0.1UF ECQG1H472KZ 0.0047UF ECUV1H104ZFX 0.1UF MAIN ECQB1H153JF 0.015UF ECUV1H030CCN MAIN ECQG1H152KZ 0.0015UF...
Page 49 Ref. No. Part No. Part Name & Description Remarks ECCR1H471J 470P ECQG1H332KZ 0.0033UF C51 52 ECA1JHG221B 220PF 50V C53 54 ECQV1J105JM C57 58 ECQV1J105JM C59 60 ECEA50Y1R5K 1.5UF 50V C61 62 ECEA50Y47 47UF 50V C63 64 QCBG1H104ZFA 0.1UF C65 66 ECEA1HKN010 1UF 50V ECQG1H472KZ...
Page 50 Ref. No. Part No. Part Name & Description Remarks C228 ECUV1H104ZFX 0.1UF MAIN C229 ECEA1HKA010 1UF 50V MAIN C230 ECEA1CKA100 10UF 16V MAIN C231-33 ECUV1H104ZFX 0.1UF MAIN C234 ECUV1C224KBX 0.22(B) MAIN C235 ECUV1H472KBG 0.0047 MAIN C236 37 ECUV1H102JX 0.001UF MAIN C238 ECUV1H680JG 68PF...
Page 51 Ref. No. Part No. Part Name & Description Remarks CN8 N9 QJUG05309AA CONNECTOR ASUB CN101 SJPG1JS150 CONNECTOR MAIN CN102 SJPG1JS060 CONNECTOR MAIN CN103 SJPG1JS100A CONNECTOR MAIN CN104 SJPG1JS120 CONNECTOR MAIN CN105 SJPG1JS070A CONNECTOR MAIN CN106 SJPG1JS040 CONNECTOR MAIN CN107 QJUG05219AA CONNECTOR MAIN CN108...
Page 52 Ref. No. Part No. Part Name & Description Remarks MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5VT DIODE SVDGS3V20-15 RECTIFIER MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5VT DIODE SVDGS3V20-15 RECTIFIER MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5VT DIODE SVDGS3V20-15 RECTIFIER ERA1502V5 DIODE MA165 DIODE MKB1 MA165TA5 DIODE...
Page 53 Ref. No. Part No. Part Name & Description Remarks MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5VT DIODE MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5 DIODE MA165TA5VT DIODE MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5 DIODE MA165TA5VT DIODE MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5VT DIODE MA4240MTA ZENNER...
Page 54 Ref. No. Part No. Part Name & Description Remarks MA165TA5VT DIODE MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5VT DIODE MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5VT DIODE MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5VT DIODE MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5VT DIODE MA165 DIODE MKB1 MA165TA5...
Page 55 Ref. No. Part No. Part Name & Description Remarks MA165TA5VT DIODE MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5VT DIODE MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5VT DIODE MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5VT DIODE MA165 DIODE MKB1 MA165TA5 DIODE MA165TA5VT DIODE MA165 DIODE MKB1 MA165TA5...
Page 56 Ref. No. Part No. Part Name & Description Remarks MA165 DIODE MKB1 LN282RPXVTX3 LED(RED) LN282RPXVTX3 LED(RED) MA165 DIODE MKB1 LN282RPXVTX3 LED(RED) LN282RPXVTX3 LED(RED) MA165 DIODE MKB1 LN282RPXVTX3 LED(RED) LN282RPXVTX3 LED(RED) MA165 DIODE MKB1 LN282RPXVTX3 LED(RED) LN282RPXVTX3 LED(RED) MA165 DIODE MKB1 LN282RPXVTX3 LED(RED) LN282RPXVTX3...
Page 57 Ref. No. Part No. Part Name & Description Remarks LN382GPXVTX3 LED(GREEN) MA165 DIODE MKB2 LN282RPXVTX3 LED(RED) LN282RPXVTX3 LED(RED) MA165 DIODE MKB2 LN282RPXVTX3 LED(RED) LN282RPXVTX3 LED(RED) MA165 DIODE MKB2 LN282RPXVTX3 LED(RED) LN282RPXVTX3 LED(RED) MA165 DIODE MKB2 LN282RPXVTX3 LED(RED) LN282RPXVTX3 LED(RED) MA165 DIODE MKB2 LN282RPXVTX3...
Page 58 Ref. No. Part No. Part Name & Description Remarks D111 LN382GPXVTX3 LED(GREEN) D111 MA165 DIODE MKB2 D112 LN382GPXVTX3 LED(GREEN) D112 MA165 DIODE MKB2 D113 LN382GPXVTX3 LED(GREEN) D113 MA165 DIODE MKB2 D114 LN382GPXVTX3 LED(GREEN) D114 MA165 DIODE MKB2 D115 LN282RPXVTX3 LED(RED) D115 MA165 DIODE...
Page 59 Ref. No. Part No. Part Name & Description Remarks HD74LS138P DECODER MKB2 HD74LS07P HEX BUFFER HD74LS07P M5218AL OPAMP MN103002A 32 BIT MICRO COMPUTER MAIN HD74LS138P DECODER MKB2 HD74LS07P HEX BUFFER HD74LS07P M5218AL OPAMP TC7SU04FT85L INVERTER MAIN D74HC138P DECODER MKB2 IMIFS781BZBD CLOCK GENERATOR MAIN IC4 C5...
Page 60: Packing Case
Ref. No. Part No. Part Name & Description Remarks IC307 QSIGX3C64011 MASK-ROM MAIN IP3 P4 ICP-N75T104 IC PROTECTOR IP5 P6 ICP-N10T104 IC PROTECTOR IP7 P8 ICP-N75T104 IC PROTECTOR IP101 02 ICP-N10T104 IC PROTECTOR MAIN QJJG010AA JACK HEADPHONE 1 JACK2 QJSG007AA PEDAL IN JACK SJVD0203B...
Page 61 Ref. No. Part No. Part Name & Description Remarks PCB5 SXPG229621A CPL P.C.B. PCB6 SXPG229751A CPR P.C.B. PCB7 SXPG229611C INVL P.C.B. PCB8 SXPG229911 JACK P.C.B. PCB9 SXPG218211 PKB P.C.B. PCB10 SXPG231111A MKB1 P.C.B. PCB11 SXPG231111B MKB2 P.C.B. PCB12 SXPG230511 ACP P.C.B. PCB12 SXPG230521 ACP P.C.B.
Page 62 Ref. No. Part No. Part Name & Description Remarks Q105 2SA970GTPE2 TRANSISTOR ASUB Q105 2SD601AQ TRANSISTOR MAIN Q106 2SC2240GTPE2 TRANSISTOR ASUB Q107 2SC1815TPE2 TRANSISTOR ASUB Q108 2SA1015TPE2 TRANSISTOR ASUB Q109 2SA1285FTA TRANSISTOR ASUB Q110 2SC3245FTA TRANSISTOR ASUB Q111 2SA1015TPE2 TRANSISTOR ASUB Q112 2SC1815TPE2...
Page 63 Ref. No. Part No. Part Name & Description Remarks ERG1SJ470 1W 47 JACK2 ERJ6GEYJ104V 100K MAIN ERDS2TJ103 ERDS2TJ104T 100K JACK2 ERDS2TJ221T ERDS2TJ221T ERJ6GEYJ104V 100K MAIN ERDS2TJ103 ERDS2TJ221T JACK ERDS2TJ221T ERDS2TJ221T ERDS2TJ331T JACK ERDS2TJ472 4.7K JACK2 ERJ6GEYJ472V 4.7K MAIN ERDS2FJ222 2.2K JACK2 ERDS2TJ471 ERDS2TJ471...
Page 64 Ref. No. Part No. Part Name & Description Remarks ERDS2TJ102 JACK ERDS2TJ224T 220K ERJ6GEYJ470V MAIN ERDS2TJ102 JACK ERDS2TJ103 ERDS2TJ103 ERDS2TJ334 330K ERJ6GEYJ470V MAIN ERDS2TJ102 JACK ERDS2TJ103 ERDS2TJ103 ERJ6GEYJ470V MAIN ERDS2TJ103 ERDS2TJ103 ERDS2TJ220 ERDS2FJ222 2.2K ERDS2TJ103 ERDS2TJ103 ERJ6GEYJ472V 4.7K MAIN ERD2FCVJ4R7T ERDS2TJ103 ERDS2TJ103 ERD2FCVG220...
Page 65 Ref. No. Part No. Part Name & Description Remarks ERDS2TJ101 ERDS2TJ822T 8.2K ERJ6GEYJ470V MAIN ERDS2TJ101 ERDS2TJ101 ERDS2TJ152 1.5K ERJ6GEYJ472V 4.7K MAIN ERDS2TJ101 ERDS2TJ101 ERDS2TJ154 150K ERJ6GEYJ472V 4.7K MAIN ERDS2TJ101 ERDS2TJ101 ERDS2TJ122 1.2K ERJ6GEYJ330V MAIN ERDS2TJ101 ERDS2TJ101 ERDS2TJ224T 220K ERJ6GEYJ470V MAIN ERDS2TJ101 ERDS2TJ101 ERDS2TJ821T...
Page 66 Ref. No. Part No. Part Name & Description Remarks ERDS2TJ563 ERDS2TJ681T ERDS2TJ683T ERDS2TJ393T ERDS2TJ564 560K ERDS2FJ222 2.2K ERDS2TJ393T ERDS2TJ104T 100K ERDS2TJ105 ERDS2TJ152 1.5K ERDS2TJ393T ERDS2TJ564 560K ERDS2FJ222 2.2K ERDS2TJ393T ERDS2TJ104T 100K ERDS2TJ105 ERDS2FJ222 2.2K R74 75 ERF5TJ100 10 5W FLAME-PROOF R78 79 ERF2EXKR10V 0.1 2W FLAME-PROOF...
Page 67 ASUB...
Page 68 Ref. No. Part No. Part Name & Description Remarks R108 ERJ6GEYJ470V MAIN R109 ERDS2TJ103 ASUB R109 ERJ6GEYJ101V MAIN R110 ERDS2TJ103 ASUB R110 ERJ6GEYJ105V 1/10W 1M MAIN R111 ERJ6GEYJ102V MAIN R112 ERJ6GEYJ682V 6.8K MAIN R113 ERD2FCVG221T 220 1/4W FUSE TYPE ASUB R113 ERJ6GEYJ103V MAIN...
Page 69 Ref. No. Part No. Part Name & Description Remarks R221 22 ERJ6GEYJ472V 4.7K MAIN R223 ERJ6GEYJ683V MAIN R224 ERJ6GEYJ682V 6.8K MAIN R225 ERJ6GEYJ471V MAIN R226 ERJ6GEYJ472V 4.7K MAIN R227 ERJ6GEYJ683V MAIN R228 ERG1SJ101 MAIN R229 ERJ6GEYJ471V MAIN R230 ERG2SJ222 2.2K 2W FLAME PROOF MAIN R231 32 ERG2SJ100...
Page 70 Ref. No. Part No. Part Name & Description Remarks SW62 QSRGT002AA ENCODER SWITCH SW1-4 — SWITCH MKB1*1 SW5-16 — SWITCH MKB1*1 SW17-28 — SWITCH MKB1*1 SW29-40 — SWITCH MKB1*1 SW41-52 — SWITCH MKB1 MKB2*1 SW53-64 — SWITCH MKB2*1 SW65-76 — SWITCH MKB2*1 SW77-88...
Page 71 Ref. No. Part No. Part Name & Description Remarks EXBS8V101J 100W × 4 MAIN Z19 20 EXBS8V472J 4.7KW × 4 MAIN Z101 EXBV8V102J 1KW × 4 MAIN Z102-05 EXBS8V470J 47W × 4 MAIN Z106 EXBS8V221J 220W × 4 MAIN Z107 EXBV8V472J 4.7KW ×...
Page 74 18. PACKAGING...
Page 75 / Printed in Japan / S000700000 HM/AM...
Page 76: Electrical Parts Location
MKB2 P.C.B. D142 D140 D138 D136 D134 D176 D174 D172 D170 D168 D166 D164 D162 J17 D160 D158 D156 D154 D152 D150 D148 D146 D144 D167 D165 D163 D159 D157 D155 D151 D149 D147 D145 D137 D135 D133 D175 D173 D171 D169 D161...
Page 77 PKB P.C.B. JR1 JR3 SUSTAIN SOSUTENUTO SOFT (SXPG218231) ELECTRICAL PARTS LOCATION Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. PKB P.C.B.
Page 78 ASUB P.C.B. J312 J300 J322 J321 Q123 Q117 Q116 Q112 Q114 Q109 Q121 Q107 Q106 Q102 Q104 Q119 C101 D110 C104 D108 D104 D102 R121 R119 R118 R115 R116 J309 R109 C102 R107 R106 R103 R104 C105 Q120 Q124 Q118 Q115 Q111 Q113...
Page 79 JACK P.C.B. JK4 JK5 D3D1D2 C3 R1 (SXPG229911) ELECTRICAL PARTS LOCATION Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. JACK P.C.B. JACK2 P.C.B. C6 C6 (SXPG229731B) ELECTRICAL PARTS LOCATION Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. JACK2 P.C.B.
Page 80 ACP P.C.B. X XS XD XT XA OTHERS (SXPG230551) (SXPG230511) ELECTRICAL PARTS LOCATION Ref.No. Lo.No. Ref.No. Lo.No. ACP P.C.B. (SXPG230521)
Page 81 PIANO PERFORMANCE PADS Add various phrases to your performance with the pad buttons. PIANO STYLIST RHYTHM GROUP You can choose to have Various rhythm patterns are all the settings of this available for each rhythm group. instrument automatically set. PIANIST SONG FADE IN/OUT AUTO PLAY CHORD When you play a song from...
Page 82 DISPLAY Displays performance information, function settings and other messages. • Use the LCD CONTRAST buttons to adjust the display so that it is easy to read. SOUND GROUP EFFECT Various sounds are Add various effects to the available for each sound sounds.
Page 83: Pedal Setting
This instrument has many settable functions and storable memories. However, you can return the settings and memory to the factory-preset status. Press the PROGRAM MENUS button to turn Use the buttons to select the desired it on. type of initialization. •...
Page 84 (on the rear panel) LINE OUT AUX IN COMPUTER PEDAL IN THRU R + L R + L MIDI MIDI AUX IN (input level 0.5 Vrms, 6 kΩ) COMPUTER Other instruments such as a sound generator can be con- By connecting this terminal to the serial port of a computer, nected to this terminal, and the sound will be output from performance data can be exchanged.
Page 85 The following changes in performance may occur in the Technics Keyboard but do not indicate trouble. Phenomenon Remedy • Turn off the POWER button once, then turn it on again. If this The buttons, keys, etc. malfunction. procedure is not successful, turn off the POWER button once.
Page 86 Phenomenon Remedy • The remaining memory capacity of the COMPOSER is 0. Storage is not possible. • The time signature and number of measures cannot be changed Setting the time signature and number of measures is not possible. for a pattern which is currently recorded in the COMPOSER. If you wish to change the time signature and/or measure data, first follow the procedure to clear the memory.
Page 87: Punch Record
Contents Contents The data on the disk that you are using is for a The time signature of the pattern from which you different product. are copying is different from the COMPOSER memory that you are using. An error has occurred while the disk was loading. Either: Change the time signature Please try again! of the COMPOSER memory...
Page 88 MIDI Implementation Chart Digital Ensemble [ PR703/PR903 ] Function Transmitted Recognized Remarks Default 1-16 1-16 Assigned to the part. Basic Channel Changed 1-16 1-16 Default OMNI OFF, POLY MODE Mode 3 Messages *M=1 only Mode Mode 3, 4 (M=1) Mode 3, 4 (M=1) Altered 0-127 0-127...
Page 89 SCHEMATIC DIAGRAM-1 NOTE: The number which noted at the connectors on the schematic diagram as "SCHEMATIC DIAGRAM-1" or "SCHEMATIC DIAGRAM-2" indicates the schematic diagram serial number located on the left corner in the schematic diagram. MAIN 1/4 CIRCUIT A[0-25] D[0-31] IORST CP.GATE SELF.LED...
Page 90: Schematic Diagram
SCHEMATIC DIAGRAM-2 QLBG005A +3.3D 47x4 4.7Kx8 4.7Kx8 +3.3D +3.3D 4.7K 4.7K +3.3D RESET 4.7K DSDSAT 4.7K DSCLK 4.7K MMODE 4.7K BMODE VDD MN103002A (32BIT MICROCONTROLLER) DMR0 IRQ0 DMK0 DMR1 4.7K DMK1 DMR2 4.7K DMK2 A26/CS4/RAS4 DMR3 +3.3D A27/CS5 DMK3 QLBG005A A28/CS6 SYSCLK OSCI...
Page 91 SCHEMATIC DIAGRAM-3 +3.3D +3.3BB K16V1204CTL6 (16M BIT DYNAMIC RAM) TC7SH08FU (INVERTER AND GATE) 4.7Kx8 LCAS UCAS 1 2 3 4 5 33 DE +3.3D +3.3BB 220P 4.7Kx8 +3.3BB TC74VHC08F (QUAD 2 INPUT AND GATE) +3.3BB IC15 K16V1204CTL6 (16M BIT DYNAMIC RAM) LCAS UCAS 33 DE...
Page 92 SCHEMATIC DIAGRAM-4 +3.3D BYTE IC11 M29LV160B8TN RESET (16M BIT FLASH ROM) RY/BY...
Page 93 SCHEMATIC DIAGRAM-5 IC12 +3.3D QSIGX3C64016 (64M BIT RHYTHM DATA ROM) IC16 T74VHCT374AF (D TYPE FLIPFLOP) BYTE CLOCK DSP.INT3 DSP.CS DSP.RST DSP.INT +3.3D +3.3D C39 IC17 T74VHCT374AF (D TYPE FLIPFLOP) CLOCK DAC.ML DAC.MC DAC.MD IC18 TC7W32FU DAC.CS (DUAL 2 INPUT OR GATE) EEP.DO IC14 BR93LC56RFE2...
Page 94 SCHEMATIC DIAGRAM-6 MAIN 2/4 CIRCUIT IC102 TC7WT241FU DUAL 3 STATE +3.3D BUFFER +5IP IP101 CN102 R105 R106 R116 R115 R103 +5IP 4.7K 4.7K 4.7K 4.7K DATA IC104 R104 TC7WT241FU DUAL 3 STATE CPRST BUFFER C101 C104 C103 SUSTAIN +5IP2 Q101 Q102 IP102 R134...
Page 95 SCHEMATIC DIAGRAM-7 CN103 RXD- D102 D101 RXD+ MA152WK MA152WK TXD+ JACK CIRCUIT TXD- DRIVER Z105 (CN3) ON SCHEMATIC IC108 47x4 MSEL DIAGRAM 32 T7SET04FT85L (INVERTER) MIDI DRIVER RECEIVER 1 2 3 4 5 ZC104 ZC105 RECEIVER 100P D103 L101 C121 0.1 MA152WK QLBG005A IC109...
Page 96 SCHEMATIC DIAGRAM-8 C130 +3.3D +3.3D Z112 IC112 7 18 31 42 4.7Kx8 T74LCX16244A VCC(3.3V) (16BIT BUS BUFFER) +3.3D Z111 4.7Kx4 R132 4.7K Z108 100x4 R128 4.7K +3.3D R129 4.7K 10 15 21 28 34 39 45 R130 R131 +3.3D C127 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 C126 IC111...
Page 97 SCHEMATIC DIAGRAM-9 CN106 +3.3D +3.3D SELF.LED PORT.EXP CN105 SOSTE SUSTAIN SUSTN SOFT JACK CIRCUIT (CN2) ON SCHEMATIC Z110 DIAGRAM 32 +5MI 47x4 MRXD MTXD ZC106 100P DSP.DRBY EEP.D0 MIDI.TX MIDI.RX DSP.EMPTY MIC.SNS MACSEL IORST C124 CN107 +3.3D +3.3D JIGU JIGU.9M IRQ0 JIGU.CS LCD.NICOS...
Page 98 SCHEMATIC DIAGRAM-10 MAIN 3/4 CIRCUIT CKOUT LRCK SDO0 DAC.CS DAC.MD DAC.MC DAC.ML DSP.CS DSP.RST C207 0.001 IC202 TC7SU04FT85L (INVERTER) C208 C206 1 2 3 4 5 R201 R264 EA5/ED17 R202 X201 EA4/ED16 ARLR2 25MHz EA6/ED18 ARLR1 EA7/ED19 DIV512 C202 C203 EA8/ED20 EA9/ED21 R204...
Page 99 SCHEMATIC DIAGRAM-11 D201 MA2051LF +3.3D +3.3D C209 6.3V1000 D219 MA111TX L201 D221 120uH MA152WK D202 SFPB74 D220 R205 680 MA152WK R206 680 Q201 +3.3BB 2SB952A Z205 R257 R256 22x4 C216 D203 R209 6800P MA111TX Q210 C258 2SB709ARTX D204 Q203 5.5V1F MA111TX 2SC1815TPE2 Q202...
Page 100 SCHEMATIC DIAGRAM-12 C257 R252 220P 6.8K C254 R255 CN204 +15A IC208 50N1 C265 AUXR M5218AFPE3 (OP.AMP) AUXL R247 +VCC C259 C260 C261 C262 -VCC 470P 470P 470P 470P C266 R254 CN203 -15A C253 C256 R250 50N1 220P 6.8K AMPL AMPR +15A R253 R251...
Page 101 SCHEMATIC DIAGRAM-13 MAIN 4/4 CIRCUIT SDIE[0-5] SDOE[0-5] BCKX LRCKX MTNG LRCK SDO0 CKOUT +3.3D Z306 4.7Kx4 Z304 4.7Kx4 Z301 220x4 Z302 220x4 D301 D303 +3.3D MA121TX MA159ATX CN301 +3.3 C319 KS0 4 KF1 5 KS1 6 Z305 22Kx4 Z307 22Kx4 R301 Z303 220x4...
Page 102 SCHEMATIC DIAGRAM-14 IC302 T7SZ32FUT85L (2 INPUT OR GATE) 1 2 3 4 5 R313 +3.3D +3.3D C306 C311 C309 C313 WCEY1 WCEY0 WAY0 WAY1 WAY2 WAY3 WAY4 WAY5 WAY6 WAY7 WAY17 WAY18 WAY20 WAY21 Z308 +3.3D 4.7Kx4 WAY19 WAY8 WAY9 Z309 WAY10 4.7Kx4...
Page 103 SCHEMATIC DIAGRAM-15 +3.3D IC306 QSIGX3C64012 JP301 JP302 (64M BIT MASK ROM) C315 C317 IC304 QSIGX3C64014 Z326 (64M BIT MASK ROM) VCC BYTE VCC BYTE 470x4 Z318 470x4 Z319 470x4 Z320 470x4 Z321 470x4 Z322 IC303 470x4 T7SZ32FUT85L (2 INPUT OR GATE) VSS VSS VSS VSS R314...
Page 104 SCHEMATIC DIAGRAM-16 AS CIRCUIT ACP CIRCUIT POWER PRODUCTS FOR TRANSFORMER X XS XT XD XA QSRGT005AA BLUE 4700P BLACK JK1 L1 POWER QLQGT2T100SA CORD BLUE PRODUCTS FOR P PC ERA1502V5 4700P 3.3K LEDK 1.5K LEDA 130uHx3 JK1 L1 QLQGT2T100SA PRODUCTS FOR OTHERS QLQGT1B800MA 4700P JK1 L1...
Page 105 SCHEMATIC DIAGRAM-17 +VCC1 QLBG005A QLBG005A +VCC 2SD2374A-P SVDGS3V20-15 SVDGS3V20-15 MA4180TA 2SC1815TPE2 +15A SVDGS3V20-15 SVDGS3V20-15 16V100 63V10000 R101 50V1 MA4160MTA 16V10 6.8K ERA1502V5 R102 50V1 MA4160MTA 16V100 6.8K ERA1502V5 -15A 16V100 SVDGS3V20-15 SVDGS3V20-15 63V10000 2SA1015TPE2 MA4180TA SVDGS3V20-15 SVDGS3V20-15 2SB1548A-P QLBG005A QLBG005A -VCC -VCC1 C14 10P...
Page 106 SCHEMATIC DIAGRAM-18 ASUB CIRCUIT +15A +VCC-A C102 680P R101 220 R105 R107 Q121 Q101 2SC1815TPE2 2SA1015TPE2 Q107 Q105 2SC1815TPE2 R104 4.7K 2SA970GTPE2 D104 W6E05 Q109 Q104 2SA1285FTA -15A -15A 2SA1015TPE2 Q103 R109 +15A +15A 2SA1015TPE2 -VCC -VCC-A +VCC +VCC-A D101 R110 MA165TA5VT GATE-A2...
Page 107 SCHEMATIC DIAGRAM-19 CPL CIRCUIT +5IP M37471M2196S (8BIT MICROCOMPUTER) START /STOP SUMR SUML SYNCHRO ROUT START LOUT +5IP TEMPO 6.3V220 HELP QRVG25P01B53 OTHER EFOEC4004T3 PARTS/TR +5IP XOUT R1 0 R2 0 2200P +5IP VREF VREF +5IP 6.3V100 2SA830STP LN282RPXVTX3 INTRO& 4.7K 4.7K +5IP ENDING 1...
Page 108 SCHEMATIC DIAGRAM-20 SW20 SW14 MUSIC SW25 SW32 SOUL& STYLE FADE IN DISCO DEMO 8&16BEAT ARRENGER SW21 SW15 SW26 MUSIC SW33 GOSPEL& SPLIT STYLE FADE OUT BLUSE POINT BALLAD ARRENGER1 SW22 SW27 SW16 MUSIC SW34 PIANIST COUNTRY& SOUND STYLE SONG WESTERN ARRENGER JAZZCOMBO ARRENGER2...
Page 109 SCHEMATIC DIAGRAM-21 SW38 SW46 SW54 PIANO AUTO MUTE PARFORMANCE SETTING DOWN 1 PADS 1 SW39 SW55 PIANO SW47 MUTE PARFORMANCE BANK UP 1 PADS 2 SW40 SW56 PIANO SW48 MUTE PARFORMANCE STOP DOWN 2 PADS 3 SW41 SW57 PIANO SW49 MUTE PARFORMANCE CPL 1...
Page 110 SCHEMATIC DIAGRAM-22 CPR CIRCUIT +5IP M37471M2196S (8BIT MICROCOMPUTER) PLAY STPINGS EASY REC BRASS +5IP SAX& WOODWIND SW10 ORGAN& DISK ACCORDION SW11 EFOEC4004T3 FAVORITES SYNTH SW12 PROGRAM SOUND MENUS EXPLORER XOUT R1 0 R2 0 0.0022 +5IP VREF 2SA830STPB LN282RPXVTX3 LN282RPXVTX3 SOUND SOUND +5IP...
Page 111 SCHEMATIC DIAGRAM-23 SW13 SW32 SW40 SW19 SW25 MULTI PART PAGE VOCAL GRAND EFFECT SELECT DOWN SW20 SW33 SW41 SW14 SW26 GUTAR& PART PAGE CHORUS UPLIGHT HARPSI SELECT SW21 SW34 SW42 SW15 SW27 MALLET& PART DISPLAY REVERB CRCHPERC ELECTRIC SELECT HOLD SW16 SW22 SW28...
Page 112 SCHEMATIC DIAGRAM-24 SW55 SW63 SW47 PANEL MUTE MEMORY 1 DOWN 5 SW48 SW56 SW64 NEXT PANEL MUTE BANK MEMORY 2 UP 5 SW49 SW57 SW65 BANK PANEL MUTE VIEW MEMORY 3 DOWN 6 SW58 SW66 SW50 PANEL MUTE CPR 1 MEMORY 4 UP 6 SW59...
Page 113 SCHEMATIC DIAGRAM-25 MKB1 CIRCUIT HD74LS138P +VCC (3 TO 8 DECODER) 6.3V47 UNLESS OTHERWISE SPECIFIED: DIODES ARE MA165.
Page 114 SCHEMATIC DIAGRAM-26...
Page 115 SCHEMATIC DIAGRAM-27 MKB2 CIRCUIT UNLESS OTHERWISE SPECIFIED: DIODES ARE MA165.
Page 116 SCHEMATIC DIAGRAM-28 HD74LS138P (3 TO 8 DECODER) +VCC...
Page 117 SCHEMATIC DIAGRAM-29 HD74LS138P (3 TO 8 DECODER) +VCC...
Page 118 SCHEMATIC DIAGRAM-30...
Page 119 SCHEMATIC DIAGRAM-31 PKB CIRCUIT PEDAL CORD CN1 +5 PEDAL QSTGT001AA QSTGT001AA QSTGT001AA 4.7K 4.7K 4.7K INVL CIRCUIT QTDG003A +5IP MAIN2/4 CIRCUIT +5IP CCFLV 5.6K (CN108) ON SCHEMATIC DIAGRAM 6 5.6K 6.3V1000 0.047 2SD592ARS 2SD592ARS 1 FRM LOAD 2 LOAD 3 CP 4 VDD 5 VSS MAIN2/4 CIRCUIT...
Page 120 SCHEMATIC DIAGRAM-32 JACK CIRCUIT PEDAL IN SOFT QLBG005A SUST SOSU QLQGT1B800MA QLQGT1B100MA QLQGT1B100MA MRXD MTXD MIDI THRU 130uHx3 2SA933STRS 220P MIDI OUT 130uHx3 COMPUTER 2SA933STRS 220P MIDI SVIGTLP513 QLQGT1B100MA MSEL (PHOTO COUPLER) TXD- MIDI IN 130uHx3 MIDI TXD+ 1,7,8 RXD+ RXD- 0.047 130uHx3...
Page 121 SCHEMATIC DIAGRAM-33 JACK2 CIRCUIT C5 47P R8 100K 130uHx3 2.2K 4.7K 50N1 100K 0.0068 +VCC M5218AL (OP.AMP) -VCC 50N1 50N1 2.2K 1.5K 2SC1815TPE2 MA165TA5VT 2.2K 16V47 QRVG09A02B54 HEADPHONE2 MSNS LEDK LEDA 130uHx3 HEADPHONE1 0.047 0.047 SEL4214RLC05 POWER INDICATOR...
Page 122 QEXGZA34075B PKB P.C.B. JACK P.C.B. PEDAL IN QJLG013AA MAIN P.C.B. CN101 CN203 CN103 CN105 CN204 JACK2 P.C.B. CN301 CN201 QEXGSS16110A QEXGSS05100B CN202 CN102 CN108 CN104 QEXGZA12060A QEXGZA06078A CPL P.C.B. INVL P.C.B. MKB1 P.C.B.
Page 123: Speaker Box
SPEAKER BOX 6.5cm, 8 6.5cm, 8 20cm, 6 20cm, 6 QEXGEL06085F AS P.C.B. ACP P.C.B. QEXGUH06028B POWER TRANSFORMER QEXGVH03140B POWER SWITCH QEXGVH04095C QEXGSS06075A CPR P.C.B. 15cm, 8 15cm, 8 MKB2 P.C.B.
Page 124 JACK (1/2) FLOPPY DISK DRIVE MIDI COMPUTER INVL POWER TRANSFORMER MAIN CN101 CN104 CN108 CN103 IC109 DRIVER IP102 SBO2 SBI2 RECEIVER IC110 BUFFER 32 BIT MICRO CONTROLLER CP DATA,CP CLK ADDRESS BUS A0-A21 IC101 IC111 SBI1 A1-A3 A1-A14 FLOPPY DISK SBO1 CONTROLLER CONTROLLER...
Page 125 MKB1 MKB2 SWITCHES & LEDS Q1-5 IC2,3 DECODER BUFFER DRIVER MAIN VOLUME SWITCHES SEG0-SEG8 CM0-CM4 SW0-SW7 & DIODES DECODER DECODER 8BIT MICROCOMPUTER DATA,SCK SWITCHES & DIODES CN301 CN202 CN102 IP101 IC102,104 3-5V I/F IC206 IC204 CONVERTER IC205 CONVERTER...
Page 126 CN203 +VCC SWITCHES & LEDS Q1-5 IC2,3 +15A IC209 BUFFER DRIVER Q210,C258 D220 -15A SEG0-SEG11 CM0-CM4 SW0-SW7 8BIT MICROCOMPUTER MEMORY DATA,SCK +3.3BB BACK UP Q201,203 Q206,208 D219 +3.3D REGULATOR REGULATOR Q205 +3.3D REGULATOR IC208 CN201 CN204 CN105...
Page 127 Q1,2 D3,5 +15V POWER REGULATOR TRANSFORMER POWER SWITCH Q3,4 D7,9 -15V AC CORD REGULATOR IP3,7 +15A +VCC SP2(Rch) IP4,8 16cm; 6 -15A -VCC SP6(Rch) 6.5cm; 8 IC2,3,4 IC8,9 SP1(Lch) 16cm; 6 SP5(Lch) 6.5cm; 8 ASUB IC5,6,7 IC8,9 SP3(Rch) 15cm; 8 EQUALIZING POWER AMPLIFIER SP4(Lch)
Page 128 MAIN P.C.B. (COMPONENT SIDE) CN104 CN102 CN301 CN201 D210 C243 D211 C264 ZC303 Z303 Z301 IP101 C123 Q101 IC102 IC14 D301 R226 Q205 Q102 Q104 Z302 D303 CN108 C120 IP102 Z317 Z316 Z315 Z314 Z313 Z312 Z311 Q103 IC104 D302 R125 R228 D207...
Page 129: Electrical Parts Location
ELECTRICAL PARTS LOCATION Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. MAIN P.C.B. (COMPONENT SIDE) Q206 Z101 L202 R228 C220 Q207 Z107 L203 R230 C221 Q208 Z109 L204 R231 C224 Z110 R232 C225 D105 Z111 X101 R235 C226 D201...
Page 130 MAIN P.C.B. (FOIL SIDE) C319 C132 R134 C101 C233 R225 Q211 R229 C239 C240 C235 Z304 R115 D208 Z106 C263 R124 Z306 IC103 R116 R R R R R R R R R R 1 1 1 2 2 2 2 2 2 2 2 7 7 7 7 7 7 R R R R R R R R R R 1 1 1 2 2 2 2 2 2 2 2 7 7 7 7 7 7 R109 R222...
Page 131 ELECTRICAL PARTS LOCATION Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. MAIN P.C.B. (FOIL SIDE) R115 R245 C218 IC12 R116 R246 C219 IC17 R118 R247 C222 IC19 Z102 R119 R248 C223 IC103 Z103 R120 R249 C232 IC106 Z104 R121...
Page 132 AS P.C.B. J159 J160 SUML SUMR J153 J1 R54 R6 Q3 R44 R45 R46 R47 R48 R49 J160 R102 R5 Q1 R39 R40 R101 R31 R32 R33 R34 R11 Q10 J154 PMUT J155 J156 J157 J123 J125 J91 J90 J89 J124 J128 IP4 IP8...
Page 133 ELECTRICAL PARTS LOCATION Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. AS P.C.B. R101 R102...
Page 134 CPL P.C.B. AUTO SETTING D100 SW46 RHYTHM GROUP JAZZ AUTO PLAY CHORD BIG BAND& LATH & COMBO SWING WORLD APC/SEOUENCER 8&16BEAT BALLAD METRONOME SW26 VOLUME OFF/ON MODE SPLIT SW38 POINT J60 J62 SW32 SW33 SW34 SW35 SW36 SW37 SW30 SW31 SW41 J59 J61 COUNTRY&...
Page 135 ELECTRICAL PARTS LOCATION Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. CPL P.C.B. SW32 SW33 SW34 SW35 SW36 SW37 SW38 SW39 SW40 SW41 SW42 SW43 SW44 SW45 SW46 SW47 SW10 SW48 SW11 SW49 SW12 SW50 SW13 SW51 SW14 SW52...
Page 136 CPR P.C.B. J203 J133 SW48 SW47 SW50 SW49 NEXT BANK BANK VIEW PANEL MEMORY SW51 D109 D110 D111 D112 D113 D107 D108 SW57 SW61 SW55 SW56 SW58 SW59 SW60 SW52 J201 SW53 PART SELECT SW54 SW35 SW36 SW32 SW33 SW34 TRANSPOSE LEFT RIGHT 1...
Page 137 ELECTRICAL PARTS LOCATION Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. Ref.No. Lo.No. CPR P.C.B. D115 SW33 D116 SW34 D117 SW35 D118 SW36 D119 SW37 D120 SW38 D121 SW39 SW40 SW41 SW42 SW43 SW44 SW45 SW46 SW47 SW48 SW49 SW10 SW50...
Page 138 MKB1 P.C.B. D72 D70 SW40 SW38 SW32 SW30 SW29 SW28 SW27 SW26 SW25 SW24 SW23 SW43 SW42 SW41 SW39 SW37 SW36 SW35 SW34 SW33 SW31 SW44 D25 J6 SW19 SW18 SW15 SW22 SW21 SW20 SW17 SW16 SW14 SW13 SW12 SW11 SW10 (SXPG231111A) ELECTRICAL PARTS LOCATION...

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