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Vox Valvetronix VT120+ - User Manual

Vox Valvetronix VT120+
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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.
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Vox Valvetronix VT120+ Specifications

General IconGeneral
Power Output120W
Amp Models33
Speaker (Alternative)Not Applicable
Weight (Alternative)Not Applicable
Dimensions (Alternative)Not Applicable
EffectsReverb
Inputs1 x Instrument
Outputs1 x Headphone
Footswitch CompatibilityVFS5
Effects LoopYes
TubeYes
Preamp Tubes1 x 12AX7
Amplifier Type (Detailed)Hybrid modeling amplifier with tube preamp

Summary

Block Diagram

Schematic Diagrams

Hookup and Assembly

Testing Procedures

How to Boot into Test Modes

Procedure for booting the unit into specific test modes using front panel switches.

Internal Test

Automatic inspection of internal components and circuits.

CPU-DSP Interface Test

Checks wiring between CPU and DSP by reading register data.

Control Surface Test

Verification of switches, knobs, and LEDs on the control surface.

Switch and LED Functionality

Checks the functionality and status of all switches and LEDs.

Click Potentiometer (VR) Test

Tests potentiometers (VRs) with click feedback for proper operation.

Non-Click Potentiometer (VR) Test

Checks analog-to-digital conversion for potentiometers without clicks.

PHONES Jack and Audio Loop Test

Tests headphone jack status and audio signal loopback.

Data Initialization (Reload)

Initializes user programs and data stored in DATA FLASH.

Audio Test

Bypass mode to test direct signal path through INPUT and output.

Parts List

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