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Troubleshooting Flow Chart
Descriptions of normal situation:
[1] When the radio is transmitting, output voltage by Q1002 Pin 3 is about 4.2 V. When the radio is
receiving, output voltage by Q1004 Pin 3 is about 4.2 V.
[2] When the radio is transmitting, the emitter voltage, collector voltage and base voltage of Q1010 are
about 1.8 V, about 4.18 V and about 2.6 V respectively. When the radio is receiving, the emitter voltage,
collector voltage and base voltage of Q1001 is about 1.8 V, about 4.1 V and about 2.6 V respectively.
[3] The CV value varies with frequencies. Generally, it is within the range from 0.6 to 4.2 V.
[4] L1006 and L1017 are turned on.
[5] Normally, the collector voltage, base voltage and emitter voltage of Q1007 are 3.9 V, 0.81 V and
about 0.05 V respectively. The collector voltage, base voltage and emitter voltage of Q1006 are 3.16 V,
0.91 V and about 0.15 V respectively.
[6] PLL_Clk outputs 960 kHz clock.
[7] When the radio is receiving, D1006 is off and D1008 is on, the anode voltage is about 1.02 V; when
the radio is transmitting, D1006 is on and D1008 is off, the anode voltage is about 1.02 V.
[8] Normally, when there is no load at the post-stage of C1010 and C1045, the power output is about 4
dBm. When the post-stage of C1030 is disconnected, the power output of Q1006 is about 4 dBm when
the radio is transmitting and about 6 dBm when the radio is receiving.
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