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Troubleshooting Flow Chart
Descriptions of normal situation:
[1] Voltage of the power supply is about 7.4 V.
[2] For low power, VGG is 1.8 to 2.1 V; for high power, VGG is 2.4 to 2.8 V.
[3] For low power, TV/APC is 1 to 1.3 V; for high power, TV/APC is 1.8 to 2.1 V.
[4] TX_En is about 3.3 V.
[5] 5V_TX_RF is about 5 V.
[6] High power is about 4.2 W and low power is about 1.2 W.
[7] Start-up voltage of D801 is about 0.7 V. The low-pass circuit coil must be soldered appropriately and
remain in good condition. The antenna connector must be soldered with the main board properly.
[8] The matching components must be soldered appropriately and remain in good condition.
[9] Vdd is about 7.3 V; for low power, Vgg of Q803 is 1 to 1.2 V; for high power, Vgg of Q803 is 1.35 to
1.55 V.
[10] Vdd is about 7.3 V; for low power, Vgg of Q802 is 1.8 to 2.1 V; for high power, Vgg of Q802 is 2.4 to
2.8 V.
[11] Vc is about 4.8 V; Vb is about 1.4 V; Ve is about 1.1 V.
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