v
YES
Is the signal below available at pins 5, 6 of
J711 (control signals of IC701 and IC710 and
IC100 ) and 10 of J711 (control signals of
IC710) and 28, 31 of IC300 (control signals of
TU1A0) ?
5, 6 of J711,
28, 31 of IC300
3Vp-p
IC300 (and peripheral circuits)
are out of order.
(PWB-MAIN)
NO
3Vdc
10 of J711
YES
3-A (P*)
3-A (P*)
Is sound signal outputted correctly at the
pins 10, 12 ,8 of J710 connector?
?
It checks that a certain signal is outputting
in the voltage range of 1V.
NO
YES
IC100 (and peripheral circuits)
are out of order.
(PWB- SET(SUB))
IC701 and IC710 and IC711 and IC712 (and
peripheral circuits) are out of order.
(PWB-MAIN)
Page 52
MODELS: LT-2220
/ LT-2240 /
LT-3020
/ LT-3040 / LT-3050
