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Check Procedure References
Refer to the corresponding check procedure. Each check procedure is numbered the same as in
Figure 4-7 for quick reference.
Check 1, DC-DC Converter Output Voltage
1. Remove the cover referring to \Cover Removal" in Chapter 3.
2. Turn on the 4349B.
3. Using a multimeter, check to see if the voltages between the test pins (TPs), shown in
Table 4-1, on A1 Main Board Assembly are in the ranges shown in Table 4-1.
4. If passed, proceed to \Check 2, LCD Displays Anything?", otherwise proceed to \Check 9,
Fuse and Line Switch".
Table 4-1. DC-DC Converter Output Voltages (Connected)
Figure 4-8. DC-DC Converter Output Voltage Check
Test Pin (+) Test Pin ( )
11
13
14
Range
6
15
5.1
0.2 V
6
15
12
0.6 V
6
15
12
0.6 V
T roubleshooting
4-11
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Table of Contents
Troubleshooting
