SCP SCIENCE DigiPREP HP, Руководство по обслуживанию

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KeyPad service manual
Rev.1.1 24
4. Power Section
The power section is rectifying and regulating power for all different parts of the
KeyPad Controller. It is mainly composed of a transformer, a bridge diode and a
DC regulator.
D4
D5
D1
D2
AC
2200uF
5V
regulator
0.1uF
5V
1
2
3
+
FUSE
Figure 12: AC/DC converter
Ensure the voltage selector switch is at the correct position before powering the
controller (see Figure 2)
4.1 The controller is not functioning when power switch is on
o
Ensure the power cord is fully inserted into its socket (see Figure 2)
o
Unscrew the bottom plate and verify the fuse F1 (see figure 13 for
parts location)

Replace by a 0.5A if necessary AWG 1 fuse (1/4x1¼)
o
Verify all the power cables connections (see figure 12 for detail):

Green wire connected with QD3

Pin 3 of the power switch is connected to QD1

Pin 4 of the power switch is connected to QD2