Toshiba SD-170EKB2, Руководство по обслуживанию

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1-6
No display on LED, and buttons do not work
No
No
No
Yes
Yes
No display on LED, and
buttons do not work
Check whether there is
correct contact between CN3
and CN5
Correct connection
Fix power supply board top
a power supply for should
Check the U1’s pin 131,132,133
arrive the CN5 connect condition
Correct connection
Replace U1 or LED
Yes
Yes
Yes
No
Check VCC(+5v) voltage on
the power and front board
Check there are CS,
DATA and CLK signals on
CN3 on the front board.
1.Check whether bad solder exists
On U1 and pins of LED,
2.Check whether the circuit connected
to S1, S2,S3 and S4 is broken,
3.Check whether R6, R7 and R8
are open-circuit.
CN5 (PIN 2 CLK) CN5 (PIN4 DOUT)
Trouble shooting chart