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4-4 Board Drawings and Appearance
1) Logic Main Board
4-5 Logic Main Board Switch Operation
1) Internal Pattern: Set SW2001 No.2, and 4 to OFF(DOWN), No.3 to ON(UP).
2) External Pattern: Set SW2001 No.2, and 4 to ON(UP), No.3 to OFF(DOWN)/
❈ Manipulate the switches to the internal pattern for board inspection.
❈ Ignore SW201 No.1.
4-6 Board Inspections
1) All logic main boards should be completely inspected.
2) Visually inspect the part-soldering state of the entire board.
3) Set the instruments for waveform inspection.
! When a linear power supply is used, set the output voltages to 5V or 3.3V in advance.
When a SMPS is used, ensure that the output voltages are 5V or 3.3V.
@ Set the oscilloscope to 4ms/div and 2V/div.
Connect PROBE 1 as shown in the following figure and set it to TRIGGER.
Perform the test by capturing the waveforms from each point with PROBE 2.
Samsung Electronics
Figure 1. Appearance of the Logic Main Board
GND1
Figure 2. Connecting probe 1 of the oscilloscope
GND1
TP13
TP13
Circuit Operation Description
5-41
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