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Tascam Ministudio Porta One User Manual

Tascam Ministudio Porta One
56 pages
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Table of Contents

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Tascam Ministudio Porta One Specifications

General IconGeneral
BrandTascam
ModelMinistudio Porta One
CategoryMusic Mixer
LanguageEnglish

Summary

Specifications and Service Data

Features and Controls

Front Panel Controls and Indicators

Controls power, input selection, gain, EQ, faders, PAN, and indicator functions.

Input Gain and Level Controls

Adjusts input gain (TRIM) and channel input faders.

Master Fader, Outputs, and Monitoring

PHONES Control

Transport Section

Tape Transport Controls and Operations

Manages play, pause, stop, FF, REW, punch-in/out, and record functions.

Record Function Controls

VU Meters and Switching Logic

Meter Logic and Lights

Explains meter indication logic, lights, and record status.

Pitch Control, Tape Out Jacks, and DBX NR Switch

Pitch Control, Tape Out Jacks, and DBX NR Switch

Covers pitch control, tape outputs, and dbx noise reduction switch.

Circuit Description

3-1 General

Overview of the 4-channel mixer and 4-track cassette recorder.

3-2 Control Circuit

3-3 Power Supply Circuit (Power Mute Circuit)

3-4 Mixer Circuit

3-5 Record and Playback Circuit

Playback and Record Circuit Details

Illustrates signal flow and controls for playback and record operations.

Major Parts Location

Internal PCB and Component Locations

Identifies locations of main PCB assemblies and VU meter.

Measurement Conditions for Maintenance

Power and Reference Voltage Setup

Specifies voltage and reference levels for maintenance tests.

Removal of Major Parts

Part Disassembly Procedures

Instructions for removing bottom cover, mechanism, and PCBs.

Mechanical Checks and Adjustments

Capstan, Pinch Roller, and Torque Adjustments

Procedures for adjusting capstan thrust, pinch roller pressure, and torque.

Tape Travel, Azimuth, and Speed Adjustments

Wow and Flutter Measurement

Mixer Section Signal Checks and Adjustments

Standard Settings and Mixer Adjustments

Initial settings and procedures for mixer signal level adjustments.

VU Meter and Equalizer Performance Checks

Record/Playback Amplifier Characteristics

Test Points and Adjustment Overview

Identifies test points for playback level, bias, and record level.

Playback Level, Frequency Response, and Bias Traps

Bias Voltage, Record Level, and Frequency Response

Distortion and SN Ratio Measurements

Procedures for measuring overall distortion and Signal-to-Noise ratio.

Erasing Ratio and Crosstalk Measurements

DBX Amplifier Voltages

Measuring voltages in dbx amplifier circuits.

Exploded View and Parts List

Exploded Views and Parts List

Diagrams and lists of all unit parts and their locations.

IC Internal Circuit

IC Circuit Diagrams

Internal circuit diagrams for various integrated circuits.

PC Boards and Parts List

PCB Assemblies and Parts Lists

Component layouts and parts lists for main PCB assemblies.

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