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Ministudio Porta One
Tascam Ministudio Porta One User Manual
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2
Table of Contents
Contents
2
Specifications and Service Data
3
Features and Controls
4
Power Switch and Led/External DC in Jack
4
MIC/LINE Input Connector
4
Input Select Switch
4
Trim
5
Input Fader
5
Equalizer
5
Pan
6
MASTER (L/R) Fader/Line out Jacks (L/R/)
6
Tape Cue
6
Monitor (Headphones) Select Switch
6
Transport Section
7
Reset and Zero Return
7
Play Button, Pause Button
7
Stop Button/Ff Button/Rew Button
8
Rec Button
8
Remote Punch In/Out Jack
8
Record Function Switches
9
Record Functin LED
9
VU Meters and Switching Logic
10
Pitch Control
11
DBX NR Switch
11
Tape out Jacks
11
Level Diagram
12
Circuit Description
13
Block Diagram
13
Motor Control Circuit
14
Power Muting Circuit
15
Mixer Amplifier Circuit
15
Record & Playback Circuit
17
Wiring Diagram
19
Schematic Diagram - Record/Playback Ampl PCB Assy
21
Major Parts Location
24
Main Maintenance Equipment
25
Measurement Conditions for Maintenance
26
Removal of Major Parts
27
Removing the Bottom Cover (Case R)
27
Mechanism Assembly/Mixing Amp PCB Ass'y, Tape/Cue Amp PCB Ass'y
27
Precautions and Items Confirmed in Exchanging the Head and Mechanism Ass'y
27
Mechanical Checks and Adjustments
28
Capstan Assembly Thrust
28
Pinch Roller Pressure
28
Tape-Up Torque
28
Tape Travel
29
Head Azimuth
29
Tape Speed
29
FF and REW Torque
29
Mixer Section Signal Checks and Adjustments
30
Standard Settings of Control Switches and Knobs
30
Wow and Flutter
30
VU Meter Level Adjustment Illustration
30
VU Meter Level Adjustment
31
VU Meter Monitor in Record Mode
31
MIC/Line V.S. Line out Frequency Response
31
Equalizer Characteristics
31
Record/Playback Amplifier Characteristics
32
Record/Playback Amplifier Board Illustration
32
Playback Level
33
Playback Frequency Response
33
Dummy Coils
33
Bias Trap
33
Bias Voltage
34
Record Level
34
Overall Frequency Response
34
Overall Distortion
34
Overall SN Ratio
35
Erasing Ratio
35
Crosstalk between Channels/Sync Crosstalk
35
Voltages DBX Amplifiers
35
Exploded View 1
36
Parts List 1
37
Exploded View 2
38
Parts List 2
39
Exploded View 3
40
Parts List 3
41
Exploded View 4
42
Parts List 4
43
IC Internal Circuit Diagram
44
R/P Ampl PCB Ass'y Board View
45
Mixing Ampl PCB Assy's Board View
46
Schematic Diagram - Mixing Ampl PCB Assy, Tape Cue Ampl PCB Assy
47
Schematic Diagram - Control PCB Assy
48
R/P Ampl. PCB Assy Parts List
49
Mixing Ampl. PCB Assy Parts List
52
Switch PCB Assy Parts List
52
Control PCB Assy Parts List
54
Tape Cue Ampl. PCB Assy Parts List
54
4
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Tascam Ministudio Porta One Specifications
General
Brand
Tascam
Model
Ministudio Porta One
Category
Music Mixer
Language
English
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