Block Diagram - Hitachi HMA-6500 Service Manual

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BLOGK
DIAGRAM.BLOGK
SC.HEMA.SCHEMA
HITACHI HMA.6500
Meter lamp
1
st stage
Current
mirror
A
class
differential
amp.
Operation
range
limiting
protection
crrcutt
I
POWER
MOS
FET
DrREcrcoupLrNG/
differential
coNDENSER
couÈrt
ruG
amP'
+82
INPUT
(1
Vl
AC 120
V
6O Hz
_12OVl22OVl24OV,
power
50/6O
Hz
sw'
+Bl
,A
n
+12
V
Stabi lized
power
soufce
tB2
-82
Speaker
relay
drive,
Muting,
DC
detection
ctrcurt
UNSWITCHED
4OOW MAX.
(for
U.S.A.,
Canada, Asia
&
Latin
American countriesl
n
+B
I
-82'
+-B
I
^
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