TC-610/620 Service Manual
58
Adjustment Description
Ⅰ
Diagram of Operation Key (Take TC-610 for example)
Ⅱ
Instrument
Radio Communication Test Set (HP8921) 1 set
10V/3A DC Regulated Power Supply 1 set
Digital Voltmeter 1 set
Ammeter 1 set
Ⅲ
Preparation Before Adjustment
Put the board to be tested on the test clamp and turn the power on.
Note: Each test point must be in good contact with the clamp.
Ⅳ
Adjustment Steps
1. Operations Before Adjustment
1
）
Adjustment of PCB Board
After program is downloaded onto the PCB board and EEPROM is initialized with the configuration file
(program is downloaded with the test frame and initialization can be done through the programming
software or wired clone), check relative specifications at each position. If adjustment is required, connect
the programming cable and enter the adjustment mode for PC adjustment
2) Adjustment of Radio Unit
1. Rotate to CH1. Power on the radio while holding down the PTT key and SK2 key for 2s at least.
The orange LED (red LED + green LED) lights, indicating the entry into the adjustment mode. Release
the keys to enter the corresponding Tx adjustment item (preset power) of the adjustment mode. The red
LED lights. Adjust each specification according to the operation instructions.
2. Or connect the programming cable for real time adjustment in PC mode.
