Mitsubishi Electric LT-2220 Service Manual page 52

MODELS: LT-2220 / LT-2240 / LT-3020 / LT-3040 / LT-3050
3-A (P*)
3-A (P*)
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
v
10 of J711
YES
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.
YES
IC701 and IC710 and IC711 and IC712 (and
peripheral circuits) are out of order.
(PWB-MAIN)
NO
IC300 (and peripheral circuits)
are out of order.(PWB-MAIN)
3Vp-p
3Vdc
NO
IC100 (and peripheral circuits)
are out of order.(PWB- SET(SUB))