Korg DL-50 User's Manual
Contents
1. 5 CONTENTS SPECIFICATIONS 2 STRUCTURAL DIAGRAM s BLOCK DIAGRAM 44 CIRCUIT DIAGRAM 4 2 PC 9 CHECK AND ADJUSTMENT 13 PARTS LIST aaa 18 KEIO ELECTRONIC LABORATORY CORPORATION TOKYO JAPAN 1 SPECIFICATIONS KEYBOARD 49 keys SYNTHESIZER SECTION SIGNAL GENERATORS x 5 16 8 4 2 White Noise VOLTAGE CONTROLLED FILTER Cut off Frequency Resonance EG Depth Filter Mode Bandpass Lowpass KBD Follower On Off e Attack Time Decay Time Sustain Level Release Time EG Mode r Trigger Mode Single Multiple ENVELOPE GENERATOR STRINGS SECTION OCT Balance 16 8 ENVELOPE GENERATOR Attack Release Trigger Mode Single Multiple EQUALIZER Low High CONTROL SECTION JOY STICK SIGNAL GENERATOR Depth On Off MODULATION GENERATOR Vibrato Depth Speed TUNE Tune 100 cents Octave Up Normal VOLUME wivacctctissessestscesessseersnsoeeses Synthesizer Strings Power amp Volume e Pitch Bend Vibrato Depth Noise Modulation Depth FM Depth On Off INPUTS amp OUTPUTS OUTPUTS S Headphones Output Mix Outputs x 2 High Low Separate Outputs x 2 Synthe Strings Trigger Output INPUTS 2 e VCF in 5V 5V T2. amp A KORG A s ODIO FM DEP wig TUNE so ver 5 SIN SIGNAL GENERATORS ENVELOPE GENERATOR 9 5 sm 9 9 ocr JOYSTICK MG TUNE FESO VOLUME fc VOLTAGE CONTROLLED TER fc With the above setting adjust VR 11 to Obtain an oscilloscope trace like the good Obtain 1ms 1kHz on the oscilloscope example shown below Resonance Turn VR 12 counterclockwise to Repeat the fc and resonance adjustments twice Ims GOOD Check to confirm that the peak gets smaller and the fundamental waveform gets larger when you turn the resonance control counterclockwise 6 Noise gain adjustment KORG 44 amp 90 010 FM KM DEP SIGNAL GENERATORS ENVELOPE GENERATOR 44 5 9100 8 cem JOYSTICK MG TUNE ee 5 VOLUME VOLTAGE CONTROLLED FILTER With the above setting play a key and adjust VR 5 to obtain a 3Vpp noise output 17 7 PARTS LIST PARTS SPECIFICATIONS PARIS SPECIFICATIONS METAL FILM RESISTORS 25 2 2000 1 XW 7159 1 50v 0 22 51 826 1 PoLYePROPYLENE CAPACITORS 953 1 100V 0 0014 G 1 137 1 TRANSISTORS 165
3. 25 73 2 2 05 1 798F or G 1 2 67 1 25 6448 1 357 1 945 L K 19 10 0 1 945 L K selected 2 102 2 1834 2 470 1 25 3068 1 100 4 DIODES 301 1 15 1555 126 332 1 1885 4 402 1 AR 2133D 2 1 1 P MYLAR CAPACITORS 1 AN6551 17 0 001 50V K 3 LM 324 N upc 324 c 1 0 0012 7 TL 072 1 0 0015 1 LM 13600 2 0 018 2 MC 14007 1 0 0022 5 NJM 4556D 1 0 0056 2 MC 14013 BCP 1 0 0068 1 AY 3 0214 1 0 01 1 5 10430 3 0 012 1 MN 3004 2 0 018 3 MC 14046 BCP 2 0 022 2 MC 14069 upD4069 2 0 033 2 7815 upc 14315 1 0 047 4 7915 MC 7915 1 0 068 1 781 08 781 1 Rus SEMI FIXED RESISTORS 58098 3 3 8 1 POLYSTYRENE CAPACITORS 10KB 2 50V 68pF G 47KB 1 CERAMIC CAPACITORS 220KB 1 50 4706 2 2 5 120 ROTARY VARIABLE RESISTORS 220 EVH 5LA 802 B14 7 470 EVH 5LA 802 B15 2 680 EVH 5LA 802 A16 2 4700 MD EVH 6LA 802 814 1 25V gt 2 EVC BQ5P18B14 1 TANTALUM CAPACITORS 10KB x 2 16 2208 K SLIDE VARIABLE RESISTORS 6 8 LEE 3R L 45mm 2 2 ELECTROLYTIC CAPACITORS gt 50V 1 0 1 1 16 10 5 47 L LDE L 60mm 10KB 1 100 SLIDE SW 25V 1 000 SSB 12208 8
4. fiv u S Tox RBH 2 4 2 219 0315315 X9 6 952 4 21 ur lt xor 168 00901 21 23 6218 52 X5V6 257 500 XC redox 28 01 OL 9 ves lv 924 EI Wig 2 9 5 a 520 990 9 oe yz 188 168 23 2 51 AU r amp 9 8 047 93193136 m 3SION i 8 5 252 128 vi 10036I0M9 E Sb u 5 V V cov 5 Cb XV Y 619 uon 5 2 3 20 i 252 bic 3001 S 21 t 8 5 Sis 2 2 5 Oty 4 H Siu atr r xv 2 89 89070 ny 12 or gt 84072 4 div WI 219 XV gyol UA 4 goi D o aot ams MS GOW 39 1 5 gyo 218 lt 1 6 9 G 99 MS GOW 9 XC Sens S 9 OS H
5. 3004 to obtain Please refer to the block diagram FROM MIXER FILTER FILTER TO FILTER ENSEMBLE BLOCK DIAGRAM 14 DL 50 Adjustment procedure Please refer to the owner s manual for check points not covered by the adjustment procedure described here KORG I Seear O sK T PINGS z z BE 5 ule vend B 8 6 ee Bn 6 Illustration of trimmer screw and keyboard note positions 1 Tune adjustment 01 50 MIX OUT H WT 10A WT 10A S M MIX OUT L 0000 INTRIGOUT _ SYN S OUT STA_HMOUTL 9 OUT X Xx x KORG 4 Y ROO VR 6 7 OCT BAL ver 8 RESO EGDEP f JOYSTICK TUNE VOLUME VOLTAGE CONTROLLED FILTER mm JOYSTICK With controls at settings shown above play key through C5 in that order while checking to see and adjust VR7 to obtain a 0 cent reading that the release time is about the same for each the WT 10A key Next set the release control to 2 and play C1 15 2 Joy stick adjustment Settings 60850 OFF FMSW ON Settings Play C1 and move the joy stick all the way to the right adjust the FM depth contr
6. A 250 0 5V S G LEE 3R 100KB CONNECTORS g LEE 3R 100M8 WS 14 4 LEE 3R 100KB WS 1 2 LEE 3R 100KB WS 2 White Noise LEE 3R 100KB WS 3 V C F Cut off Freq LDE 3R 10KB V5 4 SLIDE SW KNOB We5 TRIGGER MODE 55 12208 WS6 KBD FOLLOWER SSB 12208 5 7 TP FILTER MODE SSB 12208 V5 8 S TRIGGER MODE 558 12208 WSQ 3P 3P VCA EG MODE SSB 12208 5 10 4 OCTAVE 558 12208 WS 11 JOYSTICK SG SS8 12208 WS 12 JOYSTICK VCF SSB 12208 WS 13 ROTARY KNOB PRINTED CIRCUIT BOARD ROTARY KNOB x 13 KLM 1838 235A SLIDE Vr KNOB 236A SLIDE Vr KNOB KOC E40039 237A x42 238 SLIDE SW KNOB 239A SLIDE SW KNOB 40026 POWER TRANS FORMER KA 221 100 220V 240V 221 117 x8 JOYSTICK UNIT JOYSTICK KNOB x 1 PHONE JACK PHONES OUT VCF fcM IN TRIG IN OTHERS 5 SG 7701 SG 7617 6 7617 SG 7501 19 LV L quss ER GUIAS y 10 11 Rr O 5 6 CHECK AND ADJUSTMENT To service personnel As you may note in the block diagram the DL 50 strings synthesizer does not oeprate on the Hz V system MAJOR CIRCUIT EXPLANATIONS 1 gt SIGNAL LINE v CONTROL LINE Top ocTAVE p DIVIDER VIB JOYSTICK TUNE ADJ The VCO is not controlled in the same way as MG vibrato joy stick and tuning sections The conventional Hz V systems Instead oscillation is VCO s clock pulse o
7. INAS ne ns 4 H3A31HINXS 2999VMVI 5001 GHA Qi 8 01 128 099 lt Pea 2 OO 669MV Gu 10055MI815 022 6C2 MIX 318M39M3 i 95 48056 3 ego Seay Ab 394 154 Cog Wee Bas 5 PC BOARD zr V8C W1 3 IAE Fatal sh PY HX RE EE a 957058 1 9 li 5 Rn is Maps 5 PARTS NAME SPECIFICATIONS PARTS NAME PANEL INSTRUCTION STANDARD KEYBOARD POTENTIOMETERS C C 49 ESK 316V VOLUME EVC BO5 P18B14 CONNECTORS DEPTH EVH 6LA802814 0 STRINGS Attack EVH SLA802A16 BOTTOM 7 STRINGS Release EVH 5LA802A16 1 STRINGS Tune EVH 5LA802B15 5 STRINGS Tune EVH 5LABO2B15 BESPSHEN STRINGS Oct Bal EVH 5LABO2B14 RESONANCE EVH 5LA802B14 TOP ENTRY m B 3P SHF 1 3 TUNE EVH SLA802B14 B 4P SHF 1 6 VIB DEPTH EVH 5LA802B14 B 5P SHF 1 1 VIB SPEED EVH 5LA802814 B 8P SHF 1 5 fcM DEPTH EVH 5LAB802814 B 9P SHF 1 1 FM DEPTH EVH 5LA802B14 PHONE JACKS JOYSTICK E3SXCO3 10KB2 SG 7501 SLIDE VOLUME 56 7617 with stopper STRINGS LEE 3R 10KB SG 7701 SYNTHESIZER LEE 3R 10KB LUG BOARD EG Attack LEE 3R 2MA L 1205 EG Decay LEE 3R 1MA EG Sustain LEE 3R 10KB FUSE EG Release LEE 3R 2M
8. ol so the pitch rises to G1 during this procedure Next play G1 and move the joy stick all the way to the left adjust VR6 so the pitch falls to C1 Repeat twice JOYSTICK 3 Synthesizer section VCA gain adjustment 0000 ss 007 Nuourt 2 2 gt z Y KORG A a mag 2 MI FM DEP wi TUNE 16 gt 59 vcr 16 ENVELOPE GENERATOR B B amp MUL NP 4 vouuve VOLTAGE CONTROLLED FILTER With the above setting adjust VR 16 so that you output voltage if you turn the EO switch VCA Obtain a 0 8Vpp reading when you play A2 EG MODE on and off Next check to make sure there is no change in 4 Strings section VCA gain adjustment fcM INTRIGOUT SYN S OUT SIR n KORG 4 FM vi OP T JOYSTICK MG RESO DES FIM cra VOLUME VOLTAGE CONTROLLED FILTER With the above setting play C1 and check three at the same time check for movement cycles of the signal waveform Adjust VR4 to the following two cycles to confirm ensemble obtain 0 8Vpp for the leading edge of the first effect operation Refer to illustration 0 8 fc resonance adjustment i 0000 O I 6 SYN SOUT SIR v
9. rigger in oo DIMENSIONS 9 836 x 153 H x 378 0 mm 9 10 4 9 Dust Cover Connection Cord Voltage Local Voltage 50 60H2z Wattage 15W WEIGHT POWER CONSUMPTION 2 STRUCTURAL DIAGRAM 2 _ ZZ iem Remarks Metal fitting of front panek A Right Metal fitting of front panel A Left Metal fitting of front panel B Right Metal fitting of front panel B Left Metal fitting of side panel Phone jack mounting board Slide Vr mounting board Slide Vr mounting board Slide Vr mounting board Slide SW cover Blind plate Radiation board Joystick VR mounting board Slide SW cover Control panel mounting board Bottom Side panel Left Side panel Right Control panel Joystick lever knob Rotary knob Slide VR knob Slide SW knob 3 BLOCK DIAGRAM 17091919 1081N02 WNOIS 4 3417 MV 9VI0M 01 05 10 4 CIRCUIT DIAGRAM 13102 5 5 9 9 CevoiS 4 EE 6 M ay rsa NE A vow ewer won 400 UG ra
10. utput frequency is divided continuous and the oscillator frequency changes by the flip flop and drives the top octave divider depending on separate control voltages from the IC AY 3 0214 2 Driver Keyer 16 DRIVER KEYER DIVIDER 49 KEYBORD The 10430 1C includes MOS gate divider and the driver keyer input mixer circuit functions In other words 4 notes 4 octaves x 3 1 49 notes The chromatic signal from the top octave divider output is applied to the 5 10430 input of the When a key is pressed on the keyboard an driver keyer Each 5 10430 driver I envelope signal is applied to gate the note The provides a mixed output consisting of 4 notes in mixer output provides one signal for the strings each octave Three of these 5 therefore gen section and another signal for the synthesizer erate 48 notes High C alone is obtained sepa section rately from the flip flop and applied directly to 13 The mixer output signal is applied through LPF cut off frequency EG etc or inputs to the 1C 13600 circuit EG control signal voltage determines VCA opera Filter operation is determined by control signals tion and thereby controls the audio signal input from KBD FOLL keyboard follower joy stick to the total mixer 4 Ensemble FROM STRINGS MIXER ENSEMBLE gt smi The mixer output signal for the strings section is the ensemble effect applied to two BBD IC IC MN
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