Akai LEA-16S02P, Руководство по обслуживанию

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TV cannot scan any channel/
picture
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Check if the RF cable do have signael
N
repair external RF equipment
Y
Check the pin no. 7 of T1 is 5V
Repair this
pin power
net
Y
N
Check the pin no. 4 & 5 of T1 has date of
I
2
C
N
Y
Check the pin no. 8 of T1 has signal
N
Check the network from pin no.8
of T1 to U14 /TSUMV26KE
or network between U14
and TV pins or 33v Boost Circuit
Y
Check pin no. 2 of T1 has voltage
(1.8 ~4.3V)
Repair this circuit
N Y
T1 damage
Check I2C net
(Circuit from pin
no.68 to pin no.69 of
SUMV26KE or from
pin4 to pin5 of T1)
TV no sound but pictures
Is the same on PC ?
N
Y
Ref to the repair process of
“No. 5 – Audio trouble (no sound)
Check the pin no. 1 & 2 of SAW1/AF389A2D has signal ?
1. SAW1 damage
2. The circuit from SAW1 to U14 is not in normal
3. U14 damage
Check the network
from the pin no. 1&2 to the
tuner
Y N
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