Korg D888_Service_Manual电路图.pdf
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1、KORG D888 SERVICE MANUAL TABLE OF CONTENTS ASSEMBLY SKETCH (HOOKUP):2 BLOCK DIAGRAM:3-4 SCHEMATIC DIAGRAM:5-9 TEST MODE and INSPECTION:10-16 PARTS LIST:17-18 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 D888TEST MODE & INSPECTION Page 1/6 Needed Apparatus for test 1)Monaur
2、al standard chord x2-8(for INPUT-OUTPUT, for FOOT SW) 2)FOOT SW 3)Headphones 4)AC chord 5)S/P DIF optical cable 6)MIDI cable 7)D3200 (if you can prepare) Switch operation in the test mode REC: Go to the next test (1)TEST MODE INSPECTION Connect AC chord to D888 Turn power on the switch at rear panel
3、 .Pushing FF and PLAY, push ON-STAND-BY Continue pushing FF and PLAY After several seconds, following display will appear. D888 TEST MODE External Check TEST01:SPEC. HDD Volume : 37.3GB SYSTEM *.*.* B000* Then, take your fingers off from the switches. Push REC TEST02 PHANTOM In the LCD display, Exte
4、rnal Check TEST02:PHANTOM STEP01:PHANTOM ON Above display will appear. Confirm the LED of PHANTOM lit. Push REC In the LCD External Check TEST02:PHANTOM STEP02:PHANTOM OFF Above display will appear. Confirm the LED of PHANTOM turned off. Push REC Note Page 2/6 TEST03 LED/SWITCH STEP1:LED ALL-ON Conf
5、irmation of all LEDs lit, confirm LEDs are lighting like followings. *HDD does not light. Red light (SW) :PHANTOM、 OUTPUT ASSIGN、BOUNCE、REC/PLAY、EFFECT ON、MENU、 METRONOME、REC Red light (LED) :STANDBY、UNDO、REDO、AUTO PUNCH、REHEARSAL、REPEAT(14 red LEDs) Orange light (SW) :CH ON、1、2、3、4、5、6、7、8、MASTER (
6、Orange 10 LEDs) Green light (SW) :PLAY(4 LEDs) White light:LCDBack light Push REC STEP2:CLick Push name appears in the LCD display one by one, then confirm the SW and LED. Regarding following switches, push twice or more. CH1-8, and MASTER, push twice each switch and confirm that LED changes from re
7、d to green. UNDO/REDO: push twice and confirm UNDO and REDO LED light red one by one. REC/PLAY MODE: push three times and confirm that AUTO PUSH, REHEARSAL, REPEAT LED light one by one. PLAY: Push three times and the 4 LEDs light one by one. Push REC LCD INSPECTION Black dots are displayed in the LC
8、D. Confirm that there are no chipped dot or uneven dot. Push REC All dots in the LCD disappeared. Confirm that the backlight is lighting not unevenly. Push REC LCD CONTRAST INSPECTION # is displayed in the LCD, confirm the contrast changes. Push REC TEST05 A/D Rotate CH1 EQ GAIN HIGH from MAX to MIN
9、I and stop at the center click position. Confirm that the HIGH characters in the display are reversed. The reversed characters means that the working of the volume is OK. Same as above, test MIDLOWEFFECTPANFader, one by one. EFFECT and Fader have not the center click, so the test ends when MINI posi
10、tion is detected . After all tests until Fader are OK , the LED of CH2 TRACK lights. Same as above, proceed the tests until CH8. After CH8 test, LED of MASTER lights and EFFECT PROGRAM INSPECTION begins. Page 3/6 Move the EFFECT selector, then 11is displayed. Adjust the EFFECT selector at the positi
11、on of 11. Wait is displayed, after some while, 10is displayed. Move the EFFECT selector at the position of 10. Same as above, move the selector to displayed number(6,2,1) after WAIT. After finished 1, proceed the tests PARAMETER, RTN, and MST. *NOTE: In the A/D test, when the wrong VR was moved , an
12、d D888 read wrong value, ERROR is displayed, in this case pushREW then the test begin from the VR in the test. FSW in the LCD display is the test of FOOT SW. Connect foot switch to D888. Push foot switch once. Confirm the characters FSW in the LCD is reversed. Disconnect the foot switch. Push REC Fo
13、llowings are displayed in the LCD. TEST06:EXIT Power off = UNDO SW Push UNDO LCD display is cleared. Test mode has finished. Page 4/6 (2)NORMAL MODE INSPECTION Push ON-STANDBY, and turn power on. Demo Song Black Swan is displayed. Connect standard monaural chords as following. MONITOR OUT L - INPUT
14、1 MONITOR OUT R -INPUT 2 MASTER OUT L -INPUT 3 MASTER OUT R-INPUT 4 INDIVIDUAL 5 - INPUT 5 INDIVIDUAL 6 -INPUT 6 INDIVIDUAL 7 -INPUT 7 INDIVIDUAL 8 - INPUT 8 Confirm all TRIM knobs are at the position of 4. Test of Demo Song play Connect headphones to PHONE1 jack. Push PLAY Demo Song playing begins.
15、 Rotate PHONE1 and listen at appropriate volume. Confirm that the sound is not distorted or not including noise. Push STOP Pushing STOP and push REW The counter in the LCD becomes to 00:00:00.000 Connect headphones to PHONE2 jack. Push PLAY Demo Song playing begins. Rotate PHONE2 and listen at appro
16、priate volume. Confirm that the sound is not distorted or not including noise. Push STOP Pushing STOP and push REW The counter in the LCD becomes to 00:00:00.000 INPUT/OUTPUT INSPECTION Confirm that MONITOR LEVEL KNOB (left of INDIVIDUAL 5) is set at 10 When using standard monaural chords less than
17、8, do following inspection changing the chords. Push PLAY Demo Song playing begins. Rotate INPUT1-8TRIM to -60. Confirm each PEAK LED lights. After inspection of INPUT1-8, set theTRIM of 1-8 at +4. Push STOP Pushing STOP and push REW The counter in the LCD becomes to 00:00:00.000 Disconnect standard
18、 monaural chords. Page 5/6 MIDI, S/P DIF INSPECTION *Regarding MIDI S/P DIF INSPECTION MIDI、S/P DIF INSPECTION is written by a premise of using D3200 Please do following inspection when you can use D3200. When you can not prepare D3200, connect other external MIDI equipment and some equipment with d
19、igital connection. And confirm the working by D888 users manual and other equipments users manual. Turn power on D3200 refer to Settings of D3200 page. Connect the AC chord to D888 Turn power on by pushing rear POWER SWITCH. STANDBY LED lights. Push ON right of STANDBY LED. (D888 starts.) S/P DIF IN
20、SPECTION Connect S/P DIF OUT of D888 to S/PDIF IN of D3200. Move up TRACK1,TRACK2,and MASTER fader of D3200 to 0 Set MONITOR LEVEL and PHONE LEVEL of D3200 to 0 Change to connect headphones from D888 to D3200. Push PLAY of D888. Move up D3200 headphone level appropriately, and confirm the D888s demo
21、song output. Push STOP of D888. Pushing STOP and push REW of D888. Disconnect the digital cable. MIDI INSPECTION Set D888 like followings. MIDI OUT setting)CURSOR 1)Push MENU (EDIT MENU is displayed.) 2)Push (DOWN) of CURSOR 4 times. 5.MIDI OUT OFF is displayed. 3)Push (RIGHT) of CURSOR. MTC is disp
22、layed. 4) Push ENTER/OK 5)Push LEVEL METER Connect MIDIOUT of D888 to MIDI IN of D3200. Push PLAY of D3200. Waiting MTC is displayed. Push PLAY of D888. (Demo song play begins.) -The counter of D888 starts. Confirm that the counter of D3200 is also working. (After around 2 seconds display, D3200 sta
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