Korg AD120VT User manual

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AD120VT
CONTENTS
Circuit Diagram: Page 2-15
Structural Diagram: Page 16-17
Test Mode: Page 18-19
Parts List: Page:20-35
3rd Edition
Issued date: June 20th, 2003
Issued by: KORG INC.

digAMPBLKA.sch‑1‑FriOct1212:07:162001

digAMPBLKA.sch‑2‑FriOct1212:07:452001

digAMPBLKA.sch‑3‑FriOct1212:08:062001

digAMPBLKA.sch‑4‑FriOct1212:08:332001

dAMPmainver14.sch‑1‑WedJun2617:13:172002

dAMPmainver14.sch‑2‑WedJun2617:30:062002

dAMPmainver14.sch‑3‑WedJun2617:33:482002

dAMPmainver14.sch‑4‑WedJun2617:37:162002

AD60VT/AD120VT
How to start and operate the test mode
1) AD60VT:
REV CH1: FULL TEST
REV CHI1 DWN: FULL TEST (LEVEL, TUNER, FC I/F SKIP)
REV CH1 UP: EXTERNAL TEST ONLY
2) AD120VT:
REV CH2: FULL TEST
REV CH1 DWN: FULL TEST (LEVEL, TUNER, FC I/F SKIP)
REV CH2 UP: EXTERNAL TEST ONLY
BYP CH4: AUDIO TEST (A/D, D/A, THRU)
Operations during the test mode:
*Internal test
CH1+CH3: RE-CHECKING OF THE STEPS IN ERROR
CH1+CH4: ERROR SKIP
CH1+DWN: RE-CHECKING THE N.G. ITEMS
CH1+UP: SKIP THE N.G. ITEMS AND PROCEED TO THE
NEXT ITEM.
*External test:
CH4: STEP UP
CH3: RE-CHECKING THE STEPS IN ERROR
UP: ITEM UP
*Conditions when starting the test mode:

-Loop the following jacks with cables respectively.
AD60VT: SEND L – INPUT HI, SEND R – INPUT LO
AD120VT: SEND L – INPUT HI/LO
-Connect a VC-4 (foot controller) to the product respectively.

PART LIST
MODEL: AD120V(POWER PART) PAGE :1-7
N0 Q'TY SPECIFICATION DESCRIPTION REMARK
NO SUPPLY 1 1 PWB010602A PCB 350x190x1.6t FR-1 PWB010602A
*V903200015 2 2 NJM072 OP AMP NJM072
*V903200013 3 3 NJM4556 OPAMP NJM4556 or M5216 M5216
*V904530005 4 2 DG211 ANALOGUE SWITCH DG211
*V904530006 5 1 MAX333 ANALOGUE SWITCH MAX333
*V903020003 6 4 VN2410L
*V903010002 7 1 2SA1359-Y TRANSISTOR PNP 2SA1359-Y KTB631-Y
*V903010003 8 4 2SA1837 TRANSISTOR PNP 2SA1837
*V903010004 9 2 2SC2458-Y TRANSISTOR NPN 2SC2458 or KTC3198-Y KTC3198-Y
*V903010005 10 1 2SC3422-Y TRANSISTOR NPN 2SC3422 or KTD600-Y KTD600-Y
*V903010006 11 4 2SC4793 TRANSISTOR NPN 2SC4793
*V903010007 12 4 KTA1024-Y TRANSISTOR PNP KTA1024-Y
*V903010008 13 2 2SA1943-O TRANSISTOR PNP 2SA1943-O KTA1943-O
*V903010009 14 4 KTC3206-Y TRANSISTOR NPN KTC3206-Y
*V903010010 15 2 2SC5200-O TRANSISTOR NPN 2SC5200-O KTC5200-O
*V903010011 16 1 KRA102M PNP-DIGITAL TRANSISTOR TYPE KRA 102M
*V903210002 17 1 78L05 VOLTAGE REGULATOR 78L05
*V903111001 18 6 1N4007 SILICON RECTIFIRE DIODE 1N4007 T
*V903111002 19 8 1N4148 SILICON SWITCHING DIODE 1N4148 T
*V903111008 20 1 KBU604 BRIDGE RECTIFIER DIODE KBU604
*V903111009 21 1 SHSW04M BRIDGE RECTIFIER DIODE SHSW04M
*V903111003 22 2 1N5245 ZENER DIODE 15V 0.5W 1N5245 T
*V905000002 23 2 12AX7 TUBE, VACUUME TUBE 12AX7