Toshiba SD-170EKE2 Руководство по эксплуатации - Страница 9

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No display on LED, and buttons do not work

Check

correct contact between CN3

and CN5

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.

No display on LED, and

buttons do not work

Yes

whether

there

Yes

Check VCC(+5v) voltage on

the power and front board

Yes

Check

there

are

CS,

DATA and CLK signals on

CN3 on the front board.

Yes

Replace U1 or LED

1-6

Fix power supply board top

a power supply for should

CN5 (PIN 2 CLK)

Trouble shooting chart

Correct connection

Check the U1's pin 131,132,133

arrive the CN5 connect condition

CN5 (PIN4 DOUT)

Correct connection