HYT TC-618, Руководство по обслуживанию

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TC-618/626 Service Manual
71
Adjustment Description
I. Parts Overview (TC-618 as the sample)
II. Required Test Instruments
Communication Test Set (HP8921) 1 set
10V/3A Regulated DC Power Supply 1 set
Digital Voltmeter 1 set
Ammeter 1 set
III. Preparation
Place the board to be tested on the test fixture (please ensure good connection between each test
point and the fixture), and connect the board to a power supply.
IV. Adjustment Procedures
1. Operations before Adjustment
1) PCB Adjustment:
Before the PCB arrives at each work station for specification inspection, programs must be recorded
and EEPROM must be initialized by the profiles (recording with test framework / initializing with
programming software or by wired clone). If any adjustment is required, connect the programming
cable, and perform PC adjustment in the adjustment mode.
2) Radio Adjustment:
a) Rotate the Channel Selector knob to CH1, and hold down PTT and SK2 over two seconds
while powering the radio on. Then the LED glows orange to indicate that the adjustment mode
is entered. Release these keys to access an adjustment item (preset power) of the TX group. At
the same time, the LED glows red, which indicates that you may adjust all the specifications in
compliance with the operation description.
b ） Or connect the programming cable to the radio for real-time adjustment in PC mode.
2. Description of Adjustment Items