General_Music_SK760,_SK880_Service_Manual电路图.pdf

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1、1 1 1 1 1 J J J J J Index Soldering point. Male connector. Female connector. M/F faston connector. Test point. Supply voltage.Logic supply ground. Analog supply ground. Chassis ground. Earth ground. Flag joined with one or more flags GENERALMUSIC S.p.A. Sales Division: 47842 S.Giovanni in Marignano

2、(RN) ITALY - Via delle Rose, 12 - tel. 0541/959511 - fax 0541/957404 GENERALMUSIC on the NET: Opening and Keyboard Disassembling Instructions press MIDI, select COMMON/ARRG.(F5) and set Com- mon Ch. to 1 using the DIAL, press (F7) to set LOCAL OFF, verify that the keyboard plays thru RS232 by unplug

3、ging and re- inserting the RS232 loopback into the socket. Press GENERAL and select MODE(F8), select MACINTOSH using the cursor keys, press ENTER, check the 1MHz clock appear on pin 1 of COMPUTER socket (use the second probe tip to do that). Go to page 4 and press SET DATE(F1) button, set the day, m

4、onth and year using the DIAL or numeric keypad, press ENTER; also set the time pressing SET TIME(F2), finally return to the first page of GENERAL settings. ? Panel Key and Led Press GENERAL, SYSTEM INFO (F2) and (F8) the display show a warning message: press ENTER to continue, select PANEL TEST(A) a

5、nd then press all the panel buttons checking their operation on display, at the same time every led of pressed button must light up, except DISK led. ? Trackball (Pitch and Modulation) Rotate the Trackball in vertical way (Modulation) verifying the excursion displayed, it ranges from 0 to 127. Rotat

6、e the Trackball in horizontal way (Pitch) verifying the excursion displayed, it ranges from 0 to 127 with 64 on center position. A slightly difference may be adjusted by VR11(Pitch) or VR12(Mod.) on Controls panel board, major differences may be adjusted repositioning the knob or the potentiometer.

7、Press ENTER and ESCAPE simultaneously to return to HARD- WARE test menu. ? Memories and Optional Accessories Press ALL PART (F1), the instrument self-test check subse- quently the follow devices: SIMM modules (F2 Volatile DRAM), 8Mbyte sample dram (F3 Backed DRAM), Internal Hard Disk (F4 HardDisk),

8、3.5 disk drive (F5 Floppy Disk), Video interface (F6 Video) and SCSI interface (F7 SCSI Test) and marking with ?Pass? all devices checked successfully, with ?Not Present? all devices not attached, with ?Fault? all device defective. Theoreti- cally all test must be passed, if you have a mistake on a

9、device re-check its installation. Press ENTER if necessary. ? Inputs, Dsp and Vocal Processor Put MASTER - INPUT - LEVEL sliders to maximum position and rotate full clockwise GAIN1 and GAIN2 potentiometer located on the rear side. Turn on the 1KHz test tone pressing HARDWARE SET(C), meas- ure a sinu

10、soidal signal at 4Vpp on OUT 1 and OUT 2 outputs sockets (the 1KHz tone gets out OUT R and L, re-input thru MIC 1 and 2 by the appropriate cable, pass thru DSPs and finally get out from OUT 1 and 2). Turn off the signal by means HARDWARE SET(C). ? Noise level Turn off the instrument, disconnect the

11、signal cable, wait at least 30 seconds, turn on again the keyboard and check the noise level is acceptable (if not verify the insulation between electrical and chassis ground is at least 40Kohms). ? Data Hold Press GENERAL, SYSTEM INFO(F2), (F8), ENTER and DATA HOLD (F8) and then wait until the disp

12、lay show PASS. Turn off the keyboard and then remove not included optional kits (the SK base version is equipped with 2Mbyte SAMPLE DRAM only), restore the jumpers positions: J1 to A, J2 to 2MB, JP1 & 2 to B. Turn on again the instrument and verify, repeating the test, that only Backed DRAM pass, pr

13、ess ESCAPE. ? Final Verify the keyboard correct operation playing something on it, finally launch the Demo sequence pressing DEMO and ENTER. When it is finished you have tested the keyboard. ? Reliability Check Before reassembling the instrument and before deliver it to the user, it is a goal verify

14、 its reliability: To do that switch it off, or leaving it switched on but operating with greatest caution, carefully shake the boards and connec- tions inside it using an insulated tool (for example the handle of the screwdriver) to find wrong contacts and so on. Turn on the instrument and verify th

15、at it operates correctly repeating the Final Check. Disconnect the instrument from the mains, reassemble it and shake it carefully without causing aesthetics damages, re- connect it to the mains, turn on and re-check its functionality, finally leave it switched on for a long time verifing its functi

16、on- ality occasionnally. J J J J J 2828282828 Spare Part List Legend EU= Specify European Version (230Vac) US= Specify United States Version (115Vac) SK760= Mounted on SK760 only SK880= Mounted on SK880 only TRF = Transformer Supply Version only SWT= Switching Supply Version only Ref CodeDescription

17、 Accessories 271251Owners Manual (Spanish Language) 271250Owners Manual (Dutch Language) 271248Owners Manual (French Language) 271249Owners Manual (German Language) 271218Owners Manual (Italian Language) 271219Owners Manual (English Language) 955908Operating System Disk (SK760) 955909Operating Syste

18、m Disk (SK880) 955905Demo Disk 956005RASS Demo Disk 300617Owners Manual Folder 130274Mains Cable (EU) 130276Mains Cable (US) Optional Accessories 970125Carring Bag (SK760) 970110X-Metal Stand (SK760) 970300Amplified Stand 230Vac (EU) (SK880) 970311Amplified Stand 115Vac (US) (SK880) 970116Single Foo

19、t Switch 970080Triple Foot Switch 970134Piano Single Foot Switch 970107Volume Pedal 970084Dynamic Pedalboard 1303012mt Midi Cable 1304293mt RS232 Cable (MiniDin 8 To D-Sub 9) 970207Hard Disk Installation Kit (NO HD) 840824*44 Wires 7.5cm Length Flat Cable 761094*16Mbit Dram Module 140923*32 Contacts

20、 Vert Female Connector 104009*HM5118160ALJ 16Mbit Dram Ta=70nS 271062*Hard Disk Installation Instructions 93171250*Hard Disk Support 91970347Hard Disk Kit with World Contents 561004*Hard Disk with World Contents 271234 *Hard Disk Contents Sheet 91970332Hard Disk Kit with Italian Contents 561003*Hard

21、 Disk with Italian Contents 110404*2GByte Hard Disk (type depend by availability) 271233*Hard Disk Contents Sheet 970363Oriental Kit 955921*Oriental Styles and Demo Disk 955920*Oriental Sound 2 Disk 955919*Oriental Sound 1 Disk 271257*Owners Manual Oriental Kit 970225Volatile SIMM Dram Modules (4MB

22、x2) 271065 *Dram Installation Instructions 100742*Single 4MByte SIMM Module 9702132Mbyte Backed Samples Dram 9703318Mbyte Backed Samples Dram 78970330SCSI Interface Kit 89970245NTSC Audio/Video Interface Kit (US) 89970241PAL Audio/Video Interface Kit (EU) 89970343NTSC A/V & Vocal Processor (US) 8997

23、0342PAL A/V & Vocal Processor (EU) 841004*34 Wires 7.5cm Length Flat Cable 841049*10 Wires 40cm Length Flat Cable 841019*10 Wires 65cm Length Flat Cable 840823*10 Wires 10cm Length Flat Cable 840009*16 Wires 7.5cm Length Flat Cable 840204*9 Wires 15cm Length Flat Cable 841025*2 Wires 10cm Length Scr

24、eened Cable 761093*Buffer Module Board (Pcb# 315023) 103013*74HC138D SOIC 1 Of 8 Decoder 103003*74HC374DW SOIC Octal D-Type Flip-Flop 760994*Audio/Video Interf. Board (Pcb# 315092) (NTSC Version) 760993*Audio/Video Interf. Board (Pcb# 315092) (PAL Version) 761143*Audio/Video Pal & Harmonizer Board (

25、Pcb# 315109) 761152*Audio/Video Ntsc & Harmonizer Board (Pcb# 315109) 231000*BLM21A102STP Smd EMI Coil For Signal 230582*LC Delay Line 400ns 0.5MHz 230569*FL5R200PNT EMI Coil For Signal 230561*47uH 10% 100mA RF-Coil 230560*22uH 10% 170mA RF-Coil 141016*16 Contacts Vert Female Connector 141013*10 Con

26、tacts Vert Female Connector 140866*34 Contacts Vert Male Connector 140324*9 Contacts Vert Male Connector 106003*MAX709 Power Monitor With Reset 106000*TDA8501 PAL/NTSC Encoder 105010*ADSP2181 Dsp Microcomputer 105005*FPGA - Video/Lcd Controller 104003*HM514260JP SOJ Dynamic Ram 4Mbit Ta=70ns 103031*

27、74HC00D SOIC Quad Nand Gate 103030*74HC32D SOIC Or Nand Gate 103012*74HC125D SOIC Quad Tri-State Buffer 103011*AD1877 SOIC Dual Channel 1bit ADC 103010*74HC04D SOIC Hex Inverter 103007*74HC74D SOIC Dual Flip-Flop 101500*74AC138D SOIC 1 Of 8 Decoder 100739*ADV476 Color Palette Ram Dac 100059*7805 +5V

28、 1A Voltage Regulator 100045*7812 +12V 1A Voltage Regulator 100043*7912 -12V 1A Voltage Regulator 100019*TL071 LN J-Fet Operational Amplifier 091001*BC857 TO236 Smd Pnp Transistor 091000*BC847 TO236 Smd Npn Transistor 090153*BC327 TO92 Pnp Transistor 090102*2N918 VHF Npn Transistor 081000*PMLL4148 S

29、md 100mA 75V Signal Diode 080500*BB204G Dual Varicap Diode 010717*30.20979MHz Quartz Resonator (NTSC Version) 010716*7.15909MHz Quartz Resonator (NTSC Version) 010715*8.867238MHz Quartz Resonator (PAL Version) 010714*30MHz Quartz Resonator (PAL Version) 010602*5p2-30pF N750 Ceramic Capacitor Trimmer

30、 761093*Buffer Module Board (Pcb# 315023) 103013*74HC138D SOIC 1 Of 8 Decoder 103003*74HC374DW SOIC Octal D-Type Flip-Flop 271200*Vocal Processor Owners Manual Addendum 130428*3mt Video Cable (Din/Rgb To Rca) (NTSC Version) 130317*3mt Video Cable (Din/Rgb To Scart) (PAL Version) 120003*M3x8mm Screw

31、Cabinet Assembly Bottom Assembly 731009Gnd-Shield Board (Pcb#315164) 660461Bottom Chassis (SK760)(TRF) 660615Bottom Chassis (SK760)(SWT) 660462Bottom Chassis (SK880)(TRF) 660613Bottom Chassis (SK880)(SWT) 18652729Left Side (SK760) 1652728Right Side (SK760) 56261178Left Side (SK880) 53261177Right Sid

32、e (SK880) 171400Side to Panel Hooking (SK880) 340357Spacer For Left & Right Side 340330Washer 10/4x7mm 340115Adhesive Flat Cable Fixing 340093Board Spacer 190230Lateroid Insulator 171455Accessories Support 171406Phones Board Support 340435Adhesive Foot 110020T5A Fuse 5x20mm (EU) 110021T5A Fuse 6.3x3

33、2mm (US) 110010T2A Fuse 5x20mm (SWT) 110011T1A Fuse 5x20mm (EU) 110083T2A Fuse 6.3x32mm (US) 110009T630mA Fuse 5x20mm (EU) 110085T630mA Fuse 6.3x32mm (US) Top Assembly 2660453SCSI Slot Closer 4660446Controls Panel (GEM)(SK760)(TRF) 4660617Controls Panel (GEM)(SK760)(SWT) 4660450Controls Panel (GM)(S

34、K760)(TRF) 4660620Controls Panel (GM)(SK760)(SWT) 54660448Controls Panel (GEM)(SK880) (with oval wheels) 54660452Controls Panel (GM)(SK880) (with oval wheels) 54660693Controls Panel (GEM)(SK880) (with normal wheels) 54660694Controls Panel (GM)(SK880) (with normal wheels) 5660445Rear Panel (GEM)(SK76

35、0)(TRF) 5660616Rear Panel (GEM)(SK760)(SWT) 5660449Rear Panel (GM)(SK760)(TRF) 5660619Rear Panel (GM)(SK760)(SWT) 55660447Rear Panel (GEM)(SK880)(TRF) 55660614Rear Panel (GEM)(SK880)(SWT) 55660451Rear Panel (GM)(SK880)(TRF) 55660618Rear Panel (GM)(SK880)(SWT) 23652747 Actuators Rubber Strip 35652746

36、 Actuators Rubber Strip 28652745Potentiometers Display Rubber Strip 30652743 Actuators Rubber Strip 25652742 Actuators Rubber Strip 33652740 Actuators Rubber Strip 24652739 Actuators Rubber Strip 35652738 Actuators Rubber Strip 32652751 Actuator Rubber Strip 22652736 Actuators Rubber Strip 41652725L

37、eft Top Plastic Chassis (SK760)(with oval wheels) 41653489Left Top Plastic Chassis (SK760)(with normal wheels) 57652727Left Top Plastic Chassis (SK880) 40652724Right Top Plastic Chassis 37652723Display Controls Panel 29652717 Actuators Rubber Strip 34652715 Actuators Rubber Strip 39651560Display Pla

38、stic Glass 340586Insulant Spacer 26340574Left Display Rubber Keypad 27340573Right Display Rubber Keypad 340556Polycarbonate Washer for Dial 3405476.5mm Spacer 340544Spacer For Display Metal Support 340543Spacer For Display Controls Panel 340542Controls Lower Spacer 340541Controls Centre Spacer 34054

39、0Controls Upper Spacer 340538Trasparent Support For Controls Panel 59340522Disk Drive Frame (SK880) 340521Dial Support 20340512Slider Potentiometer Guide 340510Led Lens 21340494Slider Potentiometer Knob 31340493Dial Knob 11340370Mic/Line Knob 340186Adhesive Cable Fixing 3400925mm Board Spacer 230584

40、EMI Ferrite For Flat Cable 210251Potentiometers Gasket 1715833 Din Sockets Reinforcement 171472Controls & Midi I/O Board Support 801714514 Jack Sockets Reinforcement 841714506 Jack Sockets Reinforcement 105 171430Top-Bottom Chassis Reinforcement (SK880) 106 171429Controls Panel Front Reinforcement(S

41、K880) 811714244 Din Sockets Reinforcement 108 171420Right Disk Drive Support (SK880) 109 171419Left Disk Drive Support (SK880) 171417Pitch & Mod. Assy Reinforcement (SK880) 171397Spacer For R-Top Plastic Chassis 171396Spacer For L-Top Plastic Chassis 171395Analog I/O Board Support 72171392Top-Bottom

42、 Chassis Reinforcement (SK760) 73171384Display Metal Support 171383Control Panel Metal Plate 98171004Right Disk Drive Support (SK760) 99171003Left Disk Drive Support (SK760) 15003210mm Spacer 140528Right Contact Mylar Strip (display) 83140527Left Contact Mylar Strip (display) 1300617 Wires 0.20 Leng

43、th Flat Cable 120960Dial Steel Sphere 12080812mm Spacer 971104003.5 Disk Drive 77110254Rotary Encoder With Snap 38080755Lcd Display 320X240 dots SP14Q001 Hitachi Mains Assembly 7730681Mains Switch Assembly 9340359*Power Switch Frame 171008*Mains Socket & Power Switch Support 8110614*Mains Socket 101

44、10285*Power Switch Mains Filter 86767988Mains Filter Board (Pcb#315014)(TRF) 230568*10mH 250Vac 1A AC Line EMI Coil Siemens 140010*3 Contacts P=10 Vert Terminal Block 110119*Fuse Clip 10A max 020493*100n 250Vac MKP EMI Capacitor Siemens 010545*4n7 250V Ceramic Capacitor (Iec-Ul-Csa) 103 23053230mh I

45、max=1a Mains Filter Coil (SWT) Tranformers 87230127Transformer 230Vac 120W (EU)(TRF) 87230129Transformer 115Vac 120W (US)(TRF) Switching Supply Unit 101 731011SNP9541M 40W Switching Supply Unit (SWT) Power Amplifier & Supply Board (TRF) 88730668Power Amplifier & Supply Board (Pcb#315116)(TRF) 230524

46、*100uH Switching Coil 141015*14 Contacts Vert Female Connector 141010*4 Contacts Vert Female Connector 140874*Single In Line Vert Male Strip (specify contacts) 140873*4 Contacts Vert Male Connector 140325*12 Contacts Vert Male Connector 140324*9 Contacts Vert Male Connector 140323*6 Contacts Vert Ma

47、le Connector 140010*3 Contacts P=10 Vert Terminal Block 110305*Relay 12V / 2 Switch 1A 250V 110119*Fuse Clip 10A max (EU) (US) 100955*LM2576 5V 3A Switching Regulator 100931*MC34081 Single J-Fet Operational Amplifier 100906*CEM3381 Dual V.C.A. 100061*TL072 Dual J-Fet Operational Amplifier 100045*781

48、2 +12V 1A Voltage Regulator 100043*7912 -12V 1A Voltage Regulator 090183*BC550 TO92 LN Npn Transistor 090153*BC327 TO92 Pnp Transistor 090152*BC337 TO92 Npn Transistor 080606*GBU8D 8A Rectifier Diodes Bridge 080171*FE6B 6A 100V Fast Recovery Diode 080168*W02M 1.5A Rectifier Diodes Bridge 080103*1N41

49、48 100mA 75V Signal Diode 070181*10K 20% Horizontal Linear Trimmer 030950*470u 16V 20% Low Esr Vert Electrolytic Capacitor 030554*4700u 35v 20% Snap-In Electrolytic Capacitor 030525*2200u 63V 20% Snap-In Electrolytic Capacitor Mixer Board (SWT) 102 761183Mixer Board (Pcb#315151)(SWT) 141102*6 Contacts Vert Male Connector 141015*14 Contacts Vert Female Connector 141010*4 Contacts Vert Female Connector 140877*Jumper For Contacts Strip (p=2.54mm) 140874*Single In Line Vert Male Strip (specify contacts) 140873*4 Contacts Vert Male Connector 140325*12