IC2J1 or IC201 or IC205 or IC500 or IC400(and
peripheral circuits) are out of order.
(PWB-MAIN)
Problem is in IC2J1 or IC201 or IC205 or
IC500 or IC400 (and peripheral circuits).
Are the specified voltages available at the
connectors below?
CN
Name
Pin No. Voltage
A5V
J190
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
A5V
SET(SUB)
A3.3V
SET(SUB)
D2.5V
SET(SUB)
D1.9V
MAIN
AD3.3V
SET(SUB)
(f=48KHz)
2-3-1 (P*)
2-3-1 (P*)
YES
Page 46
MODELS: LT-2220
/ LT-2240 /
LT-3020
/ LT-3040 / LT-3050