SERVICE MANUAL

VOX VT120+

TABLE OF CONTENTS
VT120+
Block Diagram:2
Schematic Diagram:3
Hookup:5
TestMode:7
PARTS LIST:14

Issued: Feb.22, 2011

Ver.1.0
©2011 VOX AMPLIFICATION LTD.
110106_VT120+_BLOCK.sch-1 - Thu Jan 06 20:46:44 2011
101019_VT120+_MAIN_PP02_forSM.sch-1 - Wed Feb 09 17:58:41 2011
101019_VT120+_MAIN_PP02_forSM.sch-2 - Wed Feb 09 17:58:49 2011
KORG VT120+ Parts List = SAFETY CRITICAL COMPONENT.
EXP=EXPLODED VIEW Item No
Part Number Category Part Name Location EXP Reference QTY
530000001945 PHONE JACK BPJ-BNB-P, 8MM JACK J1 1
530000000797 PHONE JACK PHONE JACK EPJ-BBB-P(8) STEREO FOOT SW J4 1
530000001094 OP-AMP NJM072 (SMT) IC7 1
530000000194 OP-AMP IC NJU7082 IC5 1
500324018020 DAC AK4384ET-E2 MAIN IC4 1
500324018021 ADC AK5358AET-E2 MAIN IC11 1
530000000179 IC IC 74LVU04DB MAIN IC2 1
530000001098 REGULATOR UTC UR3325 MAIN IC9 1
530000002307 REGULATOR REGULATOR LM1117 5V MAIN IC6 1
530000002348 REGULATOR REGULATOR KIA78L12F MAIN IC13 1
530000000279 REGULATOR TR KTC4075 MAIN Q2,Q3,Q4,Q18 4
530000002493 DIODE ZENER DIODE 1N5256B (1/2W 30V) MAIN D22 1
530000002350 DIODE ZENER DIODE 1N4739 (1W 9.1V) MAIN ZD2 1
530000002494 DIODE ZENER DIODE 2EZ9.1D5(2W 9.1V) MAIN ZD3 1
530000001103 LED 3O4HD-7 MAIN LED11 1
LED4,LED5,LED6,LED7,LED8,
530000000208 LED LED RED 3M/M DLL-B5131Q MAIN 8
LED9,LED10,LED13
530000002196 LED DLL-B2131Q(G124) MAIN LED14 1
530000001102 LED 3RG9HW-2-A MAIN LED1,LED2,LED3 3
530000000141 DIODE BRIDGE DIODE KBU6K MAIN D7 1
530000002309 CRYSTAL CRYSTAL 20MHZ MAIN X1 1
530000002495 CRYSTAL METAL OXIDE RESISTOR 2W 150 MAIN R46 1
530000002496 CRYSTAL METAL OXIDE RESISTOR 3W 56 MAIN R62 1
530000002358 RESISTOR WIRE WOUMD 5W 0.1 OHM MAIN R141 1
530000002497 RESISTOR CEMENT RESISTOR 5W 56(SQP) MAIN R205 1
530000002318 SEMI VOLUME SEMI VOLUME KVSF689AC103 (10K) MAIN VR14,VR15 2
VR1,VR4,VR5,VR6,VR7,VR9,VR
530000000288 VOLUME VR RV160-40-15S-B10K-C0 MAIN 9
11,VR12,VR13
530000002319 VOLUME VOLUME VR RV160-40-15S-B1K-C0) MAIN VR2 1
530000000289 VOLUME VR RV160-40-15S-B10K-C11 (11C) MAIN VR3,VR8,VR10 3
SW1,SW2,SW3,SW4,SW5,SW
530000000265 SWITCH TACK SW ATS-1230B (K=9.5MM) MAIN 9
6,SW7,SW8,SW9
530000001101 TUBE SOCKET GZC9-A MAIN Q11 1
530000002320 STEREO JACK STEREO JACK CKX3.5-69 MAIN J2,J3 2
530000002517 PCB ASS'Y MAIN PCB ASS'Y(VT120+) CHASSIS 1 1
530000002323 PCB ASS'Y JACK PCB ASS'Y VT20+ CHASSIS 2 1
530000002324 PCB ASS'Y FOOT S/W PCB ASS'Y VT20+ CHASSIS 3 1
530000002499 MAIN CHASSIS MAIN CHASSIS(VT80+) CHASSIS 4 CHA0339 1
530000002518 FRONT PANEL FRONT PANEL(VT120+) CHASSIS 5 FPN0220 1
530000002519 REAR PANEL(VT120+ 100V)
530000002520 REAR PANEL(VT120+ 120V)
REAR PANEL CHASSIS 6 RPN0284 1
530000002521 REAR PANEL(VT120+ 230V)
530000002522 REAR PANEL(VT120+ 240V)
530000001126 KNOB VOLUME KNOB CHIKEN HEAD CREAM CHASSIS 7 8
530000001127 KNOB ROUND KNOB CHASSIS 8 KNOB0050 5
530000001124 KNOB TACT KNOB "A" NBR 9PIE CHASSIS 9 KNOB0047 8
530000001125 KNOB TACT KNOB "B" NBR 7PIE CHASSIS 10 KNOB0048 1
510465500501 TUBE TUBE(VALVE)12AX7AC5HG CHASSIS 14 1

530000001117 TUBE RETAINER TUBE RETAINER CHASSIS 15 SPR0012 1

530000002505 TRANS 100V = 086-VT80+J
530000002506 TRANS 120V = 086-VT80+U
TRANS CHASSIS 21 1
530000002507 TRANS 230V = 086-VT80+E
530000002508 TRANS 240V = 086-VT80+EF
530000000761 SWITCH POWER SW RL3-421 CHASSIS 22 1
530000000199 INLET INLET/FUSE HOLDER SC-8F-21 CHASSIS 23 1
530000002509 FUSE 100/120V = T4A L 250V CHASSIS
FUSE 24 1
530000000808 FUSE T2.0AL 250V CHASSIS
530000002523 CHASSIS ASS'Y(VT120+ 100V)
530000002524 CHASSIS ASS'Y(VT120+ 120V)
CHASSIS ASS'Y SET 1 1
530000002525 CHASSIS ASS'Y(VT120+ 230V)
530000002526 CHASSIS ASS'Y(VT120+ 240V)
530000002527 SPEAKER SPEAKER TSL300G1008(VT120+) SET 2 2
530000002528 CABINET ASS'Y CABINET ASS'Y(VT120+) SET 3 CAB0411 1
530000000313 HANDLE BAR HANDLE ASS'Y SET 4,5 3

530000000283 VENT GRILL ABS SET 8 9

530000000251 RUBBER FOOT SBR LARGE SET 9 4
530000002529 BAFFLE ASS'Y BAFFLE ASS'Y(VT120+) SET 1
530000000138 BRAND MARK VOX (LARGE) SILVER SET 6 1
530000000854 BRAND MARK VALVETRONICS SILVER SET 7 1
500600006508 LY100JPVCTFLY35LY37(JP)
530000000123 AC CORD 120V = KKP30-16A
530000000124 AC CORD AC CORD 230V = KKP4819R-16A PACKING 1
530000000125 AC CORD 230V = KKP650-16A
530000000126 AC CORD 240V = KKP550-16A