Hytera PD502, Service Manual, Page: 35 / 136

VHF (136-174 MHz) Troubleshooting Flow Chart
29
[2] For low power, VGG: 1.8–2.1 V; for high power, VGG: 2.4–2.8 V.
[3] For low power, TV/APC: 1-1.3 V; for high power, TV/APC: 1.8-2.1 V.
[4] TX_En: about 3.3 V.
[5] 5VA_TX: about 5 V.
[6] High power: about 4.2 W; low power: about 1.2 W.
[7] Start-up voltage of D7001: about 0.7 V. The low-pass coil must be soldered appropriately and remain
in good condition. The spring plate for the antenna must well fit the antenna connector.
[8] The match components must not be soldered inapproptiately or damaged.
[9] Vdd: about 7.3 V; for low power, Vgg: 1-1.2 V; for high power, Vgg: 1.35-1.55 V.
[10] Vdd: about 7.3 V; for low power, Vgg: 1.8-2.1 V; for high power, Vgg: 2.4-2.8 V.
[11] Vc: about 4.8 V; Vb: about 1.4 V; Ve: about 1.1 V.
[12] Vc: about 4.7 V; Vb: about 0.7 V; Ve: 0V. Start-up voltage of D9007: about 0.7 V.