Mitsubishi Electric LT-2220, Руководство по обслуживанию

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TU1A0 or IC100 or IC601 or IC500 or IC400 (and
peripheral circuits) are out of order.
(PWB-MAIN)
Problem is in IC100 or IC601 or IC500 or
IC400 (and peripheral circuits).
Are the specified voltages available at the
connectors below?
CN
Name
Pin No. Voltage
30V IC180 7 30Vdc
A9V J190 10 9Vdc
A1.5V IC600 3 1.5Vdc
D1.5V IC600 3 1.5Vdc
A3.3V J190 5 3.3Vdc
D2.5V J190 8 2.5Vdc
D1.9V L400 - 1.9Vdc
AD3.3V J190 6 3.3Vdc
NO
When the shown voltage is in
problem, PWB including the power
supply circuit (and peripheral
circuits) is the following.
Voltage with
problem
PWB including
the circuit in
problem
30V MAIN
A9V SET(SUB)
A1.5V MAIN
D1.5V MAIN
A3.3V SET(SUB)
D2.5V SET(SUB)
D1.9V MAIN
AD3.3V SET(SUB)
3Vp-p
2-5-1 (P*)
2-5-1 (P*)
YES
Page 50
MODELS: LT-2220
/ LT-2240 /
LT-3020
/ LT-3040 / LT-3050