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} CDX-MI2
4. Power Supply Stage
EXTENSION
1
I
\
|
1
|
t
1
i
'
1
i)
BATT
O
GND
\
(
1
|
i
1
1
1
i}
i
I
1
1
1
|
{8V input)
The —5V power in the main unit is available in two types;
5VA and 5VD.
The 5VA is used to supply power to the
pickup LD and to the preamplifier system and the 5VD to
other LSls.
The VM is used to supply power to the mechanism-driver
IC (1C801). No outputis available as long as mechanisms
are Operating.
82
MAIN UNIT
IC 661
TA78LO5F
8V
1
t
1
1
1
1
1
1
'
i]
'
1
1
1
1
{
\
1
1
{
H
(PVCC input)
|
1
'
1
1
)
1
1
1
'
(
t
\
'
if
'
'
'
'
Fig. 43
The
REG5
is used
to supply
power
to the system
controller (IC751 and 755) while outputting normally.
The 8V is used for the auto system circuit (amplifier
and isolator) in the extended unit and not supplied to
the main
unit.
From
this 8V, IC982
generates
the
power
supply
(A5V)
to the D/A converter
in the
extension unit.
It should be noted that the Q973 in the VD circuit has a
very high temperature.
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