Korg_Pa50_Service_Manual电路图.pdf

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1、 S S Se e er r rv v vi i ic c ce e e MMMa a an n nu u ua a al l l PA50 CONTENTS Page: 1. Technical Specification 2-24. Circuit - * is displayed on LCD (* name of Inspection) Press F2 : you can do the last inspection you just completed again. Press F3 : You can go to next inspection displayed on LCD

2、(*) If you press F3 while press key; - * is displayed on LCD, Test Mode go to next inspection irrespective of success or failure of inspection you just finished. So, please confirm if the last inspection is successful and then press F3 and go to next inspection. QA Full Inspection Pa-50Pa-50 5 INTER

3、NAL INSPECTION Followings are checked during Internal Inspection Mode. In the case of NG, FAULT! is displayed on LCD. NAND Check TGL Check TGL Dram Check TGL Rom Check Floppy Disk Check MIDI Loop Check Phone Insert Check If DRAM or PCM ROM for TGL is NG (Open/Short Circuit or etc), TGL check result

4、becomes NG and following is displayed on LCD. In this case, please finish Inspection. press key; - TGLPCMROM If FAULT! is displayed during Floppy Disk Check, MIDI Loop Check, Phone Insert Check, please check connection and press F2 to do re-test. If FAULT! is disappear, please continue. If FAULT! is

5、 displayed again, please finish test since result is NG. When FALUT! is not displayed on LCD after Phone Insert Check completion, Internal Inspection is successful. Please press F3 to go to Panel Inspection (Caution) Phone Insert Check is not displayed on LCD. *After MIDI Loop Check completion, RESO

6、URCE is displayed on LCD. This test is loading Pre-load Data from Hard Disk. Pa50 does not have Hard Disk and this test is not necessary. Please press F4, then F3 to go to Panel Inspection. QA Full Inspection Pa-50Pa-50 6 PANEL INSPECTION 1. All LEDS ON INSPECTION Please confirm if LCD Display is be

7、low, all LEDs are on and no variation of brightness. Also please confirm if START/STOP LED is orange. After confirmation, please press F3 to go to next inspection 2. SW/LED INSPECTION At first, STYLE PLAY LED is on. Please confirm LED ON according to the following list and press SW in order. Display

8、 example: Current SW Name Next SW name When you press two SWs simultaneously, these SWs name is diplayed here. This display remain. QA Full Inspection Pa-50Pa-50 7 In the list, LED OFF means that all LEDs are off. Please confirm if all LEDs are off. Following cases are NG: *Even if correspondent SW

9、is pressed, test does not progress *LED is not on when the LED should be on. *LED is on when LED should NOT be on. In the case of NG, please complete the test. Correspondent List is followed. After SW/LED Inspection Completion, please press F3 to go to LCD Inspection. Page: 11/12 DISPLAY Corresponde

10、nt SW Correspondent LED ON/LED OFF Ending1 ENDING 1 ENDING 1 Ending2 ENDING 2 ENDING 2 Intro1 INTRO 1 INTRO 1 Intro2 INTRO 2 INTRO 2 StartStop START/STOP START/STOP (RED) Synchro SYNCHRO START SYNCHRO START TapTempo TAP TEMPO SYNCHRO STOP Write WRITE WRITE Ensemble ENSEMBLE ENSEMBLE Pad1 PAD1 LED OF

11、F Pad2 PAD2 LED OFF Pad3 PAD3 LED OFF Pad4 PAD4 LED OFF PadStop PADSTOP LED OFF Transp b TRANSPOSEb LED OFF Transp # TRANSPOSE# LED OFF Octave - OCTAVE - LED OFF Octave + OCTAVE + LED OFF Record RECORD RECORD Menu MENU LED OFF DrumPerc DRUM-PERC LED OFF Drum DRUM LED OFF Bass BASS/PERC BASS LED OFF

12、Perc BASS/PERC PERC LED OFF Acc ACC/BASS ACC LED OFF Bass ACC/BASS BASS LED OFF - -/ACC1 - LED OFF Acc1 -/ACC1 ACC1 LED OFF Page: 10/12 DISPLAY Correspondent SW Correspondent LED ON/LED OFF Seq1 SEQUENCER 1 SEQUENCER 1 LED OFF Seq1Pause SEQUENCER 1PAUSE LED OFF Seq1PlayS SEQUENCER 1PLAY/STOP SEQUENC

13、ER 1PLAY/STOP Seq2 SEQUENCER 2 SEQUENCER 2 LED OFF Seq2Pause SEQUENCER 2PAUSE LED OFF Seq2PlayS SEQUENCER 2PLAY/STOP SEQUENCER 2PLAY/STOP Prog.bank PROGRAM Leftmost SW Program bank Upper Piano PIANO Program bank Lower E.Piano E.PIANO LED OFF Mallet MALLET - DIAL is displayed on LCD. 2. Set Dial so t

14、hat the hollow of the dial comes right above. 3. Press UP/+ 4. Go around the dial clockwise and turn to the position of the right above same again 5. Confirm if the Value +24 is displayed on LCD. 6. After confirmation Press UP/+ again 7. Go around the dial anti-clockwise and turn to the position of

15、the right above same. 8. Confirm if the value -24 is displayed on LCD. 9. After confirmation, Press F3 QA Full Inspection Pa-50Pa-50 18 SPEAKER INSPECTION Inspection for Speakers 1. Press F3 after Press key; - SPEAKER is displayed on LCD 2. Adjust Master Volume and confirm if Low Range Sound comes f

16、rom Left Speaeker and No sound comes from Right Speaker. 3. After confirmation, Press F3 4. Adjust Master Volume and confirm if Low Range Sound comes from Right Speaker and No sound comes from Left Speaker. 5. Press Key; - KEYBOARD is displayed on LCD. After confirmation on this display, Press F3 KE

17、YBOARD INSPECTION - Keyboard check. Next note: C7 - After confirmation on the above display, play key from C7 the rightmost one by one in order When you hit the key, key name you hit and its velocity for the key are displayed on LCD. KEY ON : C7 , v.55 OK Range of Velocty: from 40 to 95 In the case

18、of hitting other keys in mistake during this test, sound stops. In this case, please hit correctly. When the test reachs C2 (the leftmost key), press key; - end . is displayed on LCD automatically. Press F3 and you can find following display. After confirmation on the display above, Press F3 QA Full

19、 Inspection Pa-50Pa-50 19 RESTART ! is displayed on LCD Please shut down. TEST MODE COMPLETIONT NEXT STEP is PERFORMACE CHECK QA Full Inspection Pa-50Pa-50 20 MIDI THRU, MIDI Clock and Performance Inspection. After Power on, confirm if Pa50 performs correctly. Following is the method of MIDI THRU an

20、d MIDI Clock Inspection. Please send Program Change from Pa50 to MIDI Equipment and Inspect. 1. MODE PROGRAM SW on. 2. PROGRAM PIANO SW on. 3. LOWER/ACC5 SW on After completion, please check if Pa50 works properly. After confirmation, please press STYLE first, then START/STOP and confirm Demo Song i

21、s played correctly. After confirmation of PA50 operation, this inspection completes. Please make power off and take cables and Floppy disk out of Pa50. QA Full Inspection Pa-50Pa-50 21 Please make Audio inspection/measurement below on all Pa50. Frequence Response Check Line in Check Distortion Check

22、 Noise Check CONNECTION When you start FAC, please connect Pa50 output and Audio Analyzers Input. QA Full Inspection Pa-50Pa-50 22 Equipment Audio Precision ATS-2 : Audio Analyzer Please refer to each description for Audio Analyzer Setting. Enter Test Mode Please enter TEST MODE. After Internal Insp

23、ection completes, please press F4 until press key; - LINE IN is displayed on LCD. After confirmation of Display, please press F3 and confirm the following LCD display. Frequence Response Check 1. IN-OUT L 100Hz Input Signal : INPUT L/MONO, 100Hz, 1Vrms Range : OUTPUT L/MONO, 100Hz, -3.0 to -1.0dBV 2

24、. IN-OUT L 1KHz Input Signal : INPUT L/MONO, 1KHz, 1Vrms Range : OUTPUT L/MONO, 1KHz, -3.0 to -1.0dBV 3. IN-OUT L 10KHz Input Signal : INPUT L/MONO, 10KHz, 1Vrms Range : OUTPUT L/MONO, 10KHz, -3.0 to -1.0dBV 4. IN-OUT R 100Hz Input Signal : INPUT R, 100Hz, 1Vrms Range : OUTPUT R, 100Hz, -3.0 to -1.0

25、dBV 5. IN-OUT R 1KHz Input Signal : INPUT R, 1KHz, 1Vrms Range : OUTPUT R, 1KHz, -3.0 to -1.0dBV 7. IN-OUT R 10KHz Input Signal : INPUT R, 10KHz, 1Vrms Range : OUTPUT R, 10KHz, -3.0 to -1.0dBV QA Full Inspection Pa-50Pa-50 23 LINE IN CHECK 1. INPUT L, 1KHz Input Signal : INPUT L/MONO, 1KHz, 0.775Vpp

26、 Range : OUTPUT L/MONO, 1KHz, -0.488 to -0.775Vpp 2. INPUT R, 1KHz Input Signal : INPUT R, 1KHz, 0.775Vpp Range : OUTPUT R, 1KHz, -0.488 to -0.775Vpp QA Full Inspection Pa-50Pa-50 24 DISTORTION CHECK Setting for Audio Analyzer: LPF : 20KHz HPF : 10Hz The Audio comensation Filter : None 1. OUTPUT L/M

27、ONO Input Signal : INPUT L/MONO, 1KHz, 1Vrms Range : OUTPUT L/MONO, 1KHz, Less than 0.5% 2. OUTPUT R Input Signal : INPUT R, 1KHz, 1Vrms Range : OUTPUT R, 1KHz, Less than 0.5% QA Full Inspection Pa-50Pa-50 25 NOISE CHECK Setting for Audio Analyzer LPF : 20KHz HPF : 10Hz The Audio comensation Filter

28、: ”A”weighting When you measure phones, please change Input Cable from Output to Phones. Measurement Standard Range: OUTPUT L/MONO : Less than -78.0dB OUTPUT R : Less than -78.0dB PHONES L : Less than -80.0dB PHONES R : Less than -80.0dB Page: 1/12 Instructions for QA Full Inspection This inspection

29、 is carried out supposing a users usual use situation, and measurement of the electric spec. of details etc. is omitted. An inspection order does not need to follow below. All inspection being finally carried out will be important. Please refer to the attached drawing on Connection. On connecting pl

30、ug, please check Insertion and Extraction Force with Jack. Floppy Disk Specified SMF Data included Floppy Disk Blank Disk Formatted by Pa50 Damper Pedal DS-1H Assignable SW EXP-1 Headphone MIDI Cable CD Player Moniter Amplifier 33ohm load Shield Cable (33ohm impedance Headphone can be substituted.)

31、*33ohm load Shield Cable (or Headphone) to Phone Jack. *Connect MIDI IN and MIDI OUT by MIDI Cable (Loop connection) 1. Appearance Inspection ? according to specified appearance limitation To check if there are problems on Appearance Surface. a: Confirm if there is no scar on Appearance Surface incl

32、uding SWs/Knobs/Sliders. b: Confirm if there is no silk printing failure such as bleeding, cutting and so on c: Confirm if Switch, LED, VR and so on should be installed correctly. No gradient and unnecessary gaps and floating. d: By Visual Check, confirm if there is no height variety of keys. 2. MUS

33、IC STAND CHECK Please refer to our email dated on July 16. Please install packed Music Stand on the keyboard and check if it can be installed smoothly. - LOAD TEST MODE - Please confirm if the connection is correct. After confirmation, install Floppy Disk and then Power ON. - LOAD TEST MODE - Please

34、 confirm if the connection is correct. After confirmation, install Floppy Disk and then Power ON. After Power On, Display changes from (1) to (5) in order. (1) (2) (3) (4) (5) As soon as (5) is displayed, please press both STYLE PLAY SW and DISK SW (STYLE PLAY LED ON) and keep on press them until (6

35、) is displayed and STYLE PLAY LED is OFF. After confirm (6) display and STYLE PLAY LED off, please release the Switches. (6) (7) Finally (7) is displayed, Test Mode is loaded correctly. Page: 2/12 Please press F1 to start Internal Test. If (8) - (9) are displayed after (6), Test Mode is not loaded c

36、orrectly. Please turn off and restart from first step. (8) (9) SW LCD FUNCTION F1 GO Start Test Mode F2 Rpt Repeat Inspection F3 Next Go to Next Inspection F4 Skip Skip Inspection In the interval of each inspection, press key; - * is displayed on LCD (* name of Inspection) Press F2 : you can do the

37、last inspection you just completed again. Press F3 : You can go to next inspection displayed on LCD (*) If you press F3 while press key; - * is displayed on LCD, Test Mode go to next inspection irrespective of success or failure of inspection you just finished. So, please confirm if the last inspect

38、ion is successful and then press F3 and go to next inspection. 3. INTERNAL INSPECTION Internal Inspection inspects following contents When NG is found, FAULT! is displayed on LCD. NAND CHECK TGL Check TGL Dram Check TGL ROM Check Floppy Disk Check MIDI Loop Check Page: 3 of 12 Phone Insert Check In

39、the case that NG such as Open/Short is ound in DRAM or PDM ROM for TGL, TGL Check becomes fault and press key; - TGLPCMROM is displayed. If this sentence is displayed, complete test mode. If FAULT! is not displayed after finish of Phone Insert Check, Internal Inspection is successful. Please press F

40、3 to go to next inspection. If FAULT! is displayed During Floppy Disk Check , MIDI Loop Check, Phone Insert Check, please check connection and press F2 to repeat Internal check. If FAULT! is displayed again, the Pa50 internal test result is failure. Please complete the test and inspect next Pa50. If

41、 FAULT! is disappear, please proceed test. RESOURCE is displayed after Phone Insert Check. this procedure does not need for Pa50 FQC. So please ignore this display and press F4 - F3 to go to next Inpection (Panel Inspection) 4 PANEL INSPECTION 4-1 All LED ON INSPECTION Please confirm if LCD Display

42、is below, all LEDs are on and no variation of brightness. Also please confirm if START/STOP LED is orange. After confirmation, please press F3 to go to next inspection 4-2 SW/LED INSPECTION At first, STYLE PLAY LED is on. Please confirm LED ON according to the following list and press SW in order. P

43、age: 4 of 12 Display example: In the list, LED OFF means that all LEDs are off. Please confirm if all LEDs are off. Following cases are NG: *Even if correspondent SW is pressed, test does not progress *LED is not on when the LED should be on. *LED is on when LED should NOT be on. In the case of NG,

44、please complete the test. For QA Full Inspection, following inspections by Test Mode are not necessary. Please skip following inspections by press F4. Finally following is displayed. After confirmation above, Press F3. Following is displayed. Please confirm it and turn off Pa50 TEST MODE COMPLETION

45、Page: 5/12 Current SW Name Next SW name When you press two SWs simultaneously, these SWs name is diplayed here. This display remain. Page: 6/12 Turn Pa50 on. 5-1 Demo Song Start Press STYLE PLAYSW and SONG PLAYSW simultaneously. Internal Demo Song start automatically. 5-2 Check followings *Move Mast

46、er VR from 0 to 10 to check speaker volume varies smoothly. *Check if no VR Moving Noise (Cycle Noise) * Confirm if the body does not vibrate . NOTE: Please shake (or hit) body lightly in order to check if there are any internal soldering problems. 5-3 Connect Headphone to Pa50 and have it to check

47、if Headphone output works correctly. 5-4 Keep on connecting Headphone to Pa50 and check if LINE OUT output works correctly by Monitor Amplifiers. Disconnect Headphone Stop Demo Performance: Press SART/STOP Press MODE/PRGRAM in order to escape from DEMO MODE 5-5 On hitting key strongly, check if sound comes with normal velocity value. (All keys s