Unico SQ Series, Руководство по обслуживанию

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Electronic System
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5.3 Sampling and Signal Processing System
The working principle as follow:
1. The photo-detector receives the light signal, converts it to be electrical signal
(analog signal);
2. Amplifier the analog signal, the multiple is control by the CPU on the Slave
CPU PCB (W78E52B);
3. The A/D converts analog signal to be digital signal;
4. The Slave CPU send the digital signal to the main CPU.
5.3.1 Amplifier PCB(SST8.413.104A)
The layout of the Amplifier PCB of UV-2800, UV-2802, UV-2802PC,
UV-2802S and UV-2802PCS (R17—R20 of UV-2802S and UV-2802PCS are
different from others) is shown in figure 5.18, UV-4802 is shown in figure
5.19:
Figure 5.18 Layout of UV-2800, UV-2802, UV-2802S,
UV-2802PC, UV-2802PCS, UV-3802 Amplifier PCB
The sockets description of the Amplifier PCB of UV-2800, UV-2802(S),
UV-3802 as follow:
J1---From Power Distributing PCB
Pin 1: DC +9V
Pin 2: GND
Pin 3: DC -9V
J2---From Slave CPU PCB