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Describes manual tuning initiated by the AUTO/THRU switch.
Explains tuning initiated by AUTO/THRU and UP/DOWN keys.
Explains the AT-50's automatic tuning operation via TS-50 connection.
Describes storing and recalling tuning positions for bands.
Details the CPU's power-saving mode during transmission or presetting.
Overview of CPU, EEPROM, and system reset functions.
How data is saved and restored during power fluctuations.
How motor speed and variable condenser positions are controlled.
Communication protocol between AT-50 and TS-50.
How data is stored and retrieved from the EEPROM.
Pinout and function table for the main CPU (IC11).
Detailed pin functions and active conditions for various components.
Lists key components (ICs, transistors, diodes) with their roles.
List of parts specific to the AT Unit (X53-3470-00).
Detailed list of capacitors and inductors used in the AT Unit.
Parts list for connectors, fuses, and resistors.
Continued list of resistors, potentiometers, and relays.
List of components for the Meter Unit (X59-3940-01).
Procedures for adjusting variable condensers during repair.
Lists necessary tools and equipment for adjustments.
Step-by-step guide for various calibration and tuning adjustments.
Details connector pin assignments and functions for the AT Unit.
Visual guide to component placement on the Meter PC board.
Visual guide to component placement on the AT Unit (Component side).
Visual guide to the AT Unit's foil (solder) side layout.
Details the wiring, parts list, and dimensions of the control cable.
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