TM8100/TM8200 Service Manual Fault Finding of Control Head with Graphical Display 415
© Tait Electronics Limited June 2006
3. Check the resistors R601 and R602, and replace if necessary.
If the resistors are okay, the FPGA is faulty and the control-head
board must be replaced.
R601: 2.2kΩ
R602: 5.62kΩ
Figure 14.6 PCB layout of the function key LED and status LED circuitry
bottom side
top side
top side
bottom side
bottom side
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