Table Of Contents - Tascam 34 Operation & Maintenance Manual

Table of Contents

Maintenance2
Specifications3
Service Chart5
Circuit Description7
Logic Used In The Tape Deck7
System Control Ic7
Pin Assignment And Their Functions7
Block Diagram8
Input Signals And Resulting Modes8
Mode Transition9
Operation With More Than One Input Signal9
Input/Output Levels9
Power Shut-Off Circuit10
Initial Reset Circuit10
System Control Ic Input Circuit10
Capstan And Brake Solenoid Drive Circuit11
Flashing & Steady State Voltage11
Solenoid Drive Circuit12
Reel Motor Drive Circuit13
Reproduce Operation13
Tape Direction Sensing And Counter Clock Generation Circuit15
F.f. And Rew Operation16
Electrical Brake System16
Ff And Rew Mode Operation Control Circuit17
Counter Zero Return18
Edit Control Circuit21
Rec And Play Mute Signals21
Display Circuit22
Record Led22
Pause Led22
Amplifier Circuit Description23
Power Muting Circuit23
Bias And Record Control Circuit24
Record Circuit Switching Timing Diagram25
Reproduce Amplifier Circuit26
Amplifier Circuit Diagram27
Sync Relay Operation Timing Chart29
Level Diagram29
Checks And Adjustments30
Essential Test Equipment Required30
Removing The Panels Of The Deck31
Capstan Thrust Clearance32
Brake Mechanism32
Brake Torque32
Reel Motor Torque33
Take-Up Torque33
Pinch Roller Pressure34
Back Tension34
Reel Table Height Adjustment35
Tape Speed35
Wow And Flutter Check35
Record/Reproduce Amplifier Checks And Adjustments36
Preliminary Adjustments36
Tape Path36
Head Azimuth Adjustment36
Input Level Calibration38
Meter Calibration38
Reproduce Level Calibration38
Reproduce Frequency Response39
Bias Tuning And Bias Trap Adjustments39
Recording Bias Adjustment40
Recording Level Adjustment41
Frequency Response41
Signal-To-Noise Ratio42
Erase Ratio42
Crosstalk Measurement Set-Up42
Adjacent Channel Crosstalk44
Distortion44
Distortion Measurement Set-Up44