UHF1(400-470MHz)
Troubleshooting Flow Chart
31
Description of Normal Situations:
[1] During transmission, output voltage by Q8002 PIN3: about 4 V. During reception, output voltage by
Q8003 PIN3: about 4 V.
[2] During transmission, voltage at Q8008 E: about 1.8 V. During reception, voltage at Q8004 E: about
1.8 V.
[3] The CV value varies with frequencies. Generally, it is within the range 0.5-4.5 V.
[4] L8018/L8045 is on.
[5] Voltage at Q8007 B: about 0.7 V.
[6] PLL_Clk outputs 960 KHz clock.
Summary of Contents for PD502
Page 1: ...PORTABLE...
Page 5: ...VHF 136 174 MHz...
Page 13: ...VHF 136 174 MHz Exploded View and Packaging Guide 7 3 2 Packaging Guide...
Page 18: ...VHF 136 174 MHz Circuit Description 12...
Page 43: ...PCB 3 9 PCB VHF 136 174 MHz...
Page 44: ...PCB 3 VHF 136 174 MHz...
Page 71: ...UHF1 400 470 MHz...
Page 79: ...UHF1 400 470MHz Exploded View and Packaging Guide 7 3 2 Packaging Guide...
Page 84: ...UHF1 400 470MHz Circuit Description 12...
Page 108: ...UHF1 400 470MHz PCB 36 9 PCB...
Page 109: ...UHF1 400 470MHz PCB 37...
Page 136: ...1616300000260 2014 03 17 L07157 4...