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Circuit Operation Description
2) Jumper setting to select internal clock or external clock (CN01)
On the top of the logic main board, there is an option jumper, CN01 that allows switching between
internal and external clocks. (Refer to Figure 1.) While troubleshooting, set it to internal clock as Figure 2
shows.
fl The jumper will be stocked set to external clock. Set it to internal clock during troubleshooting, and
reset to external clock after examination.
3) Reset jumper setting (CN02)
The CN02 connector of the logic main board should be set to Reset signal as the following figure shows.
It is default setting and should not be changed.
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82
CN02
5-36
CN01
Figure 2. Jumper setting to select internal clock or external clock
Figure 3. RESET JUMPER SETTING
During Examination
(Internal Clock)
After Examination
(External Clock)
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Samsung Electronics
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