Hytera PD362, Service Manual

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Troubleshooting Flow Chart
Ua (400
‐
440 MHz)
28
[1] Voltage of the power supply is about 3.7 V.
[2] For low power, VGG is 1.2 to 1.4 V; for high power, VGG is 1.4 to 1.6 V.
[3] For low power, TV/APC is 1.4 to 1.6 V; for high power, TV/APC is 2.0 to 2.2 V.
[4] TX_En is about 3 V.
[5] 3VA_TX_RF is about 3 V.
[6] High power is about 2.6 W; low power is about 1.5 W.
[7] Start-up voltage of D8021 is about 0.7 V. The low-pass coil must be soldered appropriately and
remain in good condition. The RF connector must remain in good condition.
[8] The match components must be soldered appropriately and remain in good condition.
[9] Vdd is about 3.7 V; for low power, Vgg is 1.2 to 1.4 V; for high power, Vgg is 1.4 to 1.6 V.
[10] Vdd is about 3.7 V; for low power, Vgg is 1.2 to 1.4 V; for high power, Vgg is 1.4 to 1.6 V.
[11] Check the collector voltage and base voltage when there is no power output IURP Q606.
[12] Check the collector voltage and base voltage when there is no power output IURP Q7004.