Scully 280B Series User Manual

Model 280B
ILLUSTRATIONS
Page
1-1 Professional
Recorder/Reproducer Series 280B . . . . . . . .. 1-1
1-2
Remote Control Unit Accessory. . . . . . . . . . . . . . . . . . . .. 1-5
2-1
Mounting Dimensions .. ... ....................... 2-2
2-2
Interconnection Diagram. . . . . . . . . . . . . . . . . . . . . . . . .. 2-4
2-3
Power Supply Jumper . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-5
3-1
Controls and Indicators. . . . . . . . . . . . . . . . . . . . . . . . . .. 3-2
3-2
Tape Threading Path . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-3
6-1
System Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . .. 6-2
6-2
Transport, Bottom View. . . . . . . . . . . . . . . . . . . . . . . . . .. 6-3
7-1
Brake Adjustments ..... . ......................... 7-2
7
-2 Suggested Method of Adjusting Brake Torque. . . . . . . . .. 7-3
7
-3 Head Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7-4
7-4
Motion Sense Adjustment . ..... .. . . ............... 7-5
7-5
Tension Post Adjustments .. ....................... 7-6
7-6
Pinch Roller Adjustment. . . . . . . . . . . . . . . . . . . . . . . . .. 7-6
7-7
Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7-7
7
-8 Constant Tension Adjustment Procedures. . . . . . . . . . . .. 7-8
7
-9 Constant Tension Assembly ....................... , 7-9
7-10 ATL Adjustment ..... .. ......................... 7-9
7-11
Initial Test Setup ......... . ...................... 7-10
7-12 Electronics Assembly, Top View. . . . . . . . . . . . . . . . . . .. 7-11
7-13
Equalization PWA Adjustments. . . . . . . . . . . . . . . . . . . .. 7-12
7-14 Record/Playback Amplifier PWA Adjustment
and Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7-13
7-15
Regulator, Bias Oscillator and Amplifier PWA .......... 7-14
7-16 Bias Amplifier PWA Adjustment and Test Points .. . ... " 7- 15
8-1 Transport Logic, Schematic Diagram· . . . . . . . . . . . . . . .. 8-3
8-2
Regulator, Bias Oscillator and Amplifier PW A ......... 8-5
8-3 Bias
Amplifier PW A, Schematic Diagram. . . . . . . . . . . . .. 8-7
8-4
Record/Playback Amplifier PWA, Schematic Diagram. . .. 8-9
8-5
Record/Playback Equalization PWA ................. 8-11
8-6
Motherboard PWA Schematic Diagram ............... 8-13
8-7 Primary Power Supply, Schematic Diagram ........... 8-15
8-8 Relay Control Chassis Interconnect ................. 8-17
8-9 Erase Head Matching Board Schematic Diagram ........ 8-19
8-10
Motion Direction Sensor PWA ..................... 8-21
8-11
Squelch PWA ............ . ..................... 8-21
8-12 Remote Control .................. . . ... ......... 8-22
8-13 Line Amplifier PWA Monitor and Speaker Assembly .... 8-23
8-15 Transport Assembly (1 of 2) . . . . . . . . . . . . . . . . . . . . . .. 8-31
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Scully 280B Series Specifications

General

Brand	Scully
Model	280B Series
Category	Turntable
Language	English