Sony CDP-750 - Electrical Adjustment Procedures; RF PLL Frequency Adjustment; E-F Balance Adjustment Procedure

sEcTtoN
1
ADJUSTMENTS
ELECTR:CAL ADJUSTMENTS
l. Perform adjustments in
the
order
given.
2.
Use YEDS-I8
(Part
No.: 3-702-l0l{l) disc
unless
otherwise
indicated.
3. Use the
oscilloscope
with
more than l0
MO
im-
pedance.
a
o
o
,
RF PLL Frequency Adjurtment/Lod<
Freguency
Gheck
Proccdruc:
flequancy
counter
tftatn Doitfo
l-=l
-lLll
rp
pcKl
o---5-l
rp--J
tm
l.
Connect test
point
TP
(ASY)
to
ground
with
lead
wue.
2.
Turn
POWER
switch on.
3.
Connect
the frequency
counter
to test
point
TP
(PCK).
4.
Adjust
RVl05
so that
the reading
on
frequency
counter is
4.3218 MHz
+
30 kHz.
(RF
PLL
frequency
adjustment)
5. Remove
lead wire
connecting
TP
(ASY)
to
ground.
6. Put
disc
(YEDS-t
8) in and
press
> button.
7.
Confirm
that
the reading
on frequency counter
is
4.3218 MHz.
Adjustmcnt
Location:
main board
TP
A.G)
e
RVIOS
e
TP
(ASY)
COMPONENT
SIDE
(FRONT)
E-F Brlrnco
Adjurtmcnt
This
adjustment
should be
Optical
pick-up
Block.
hoccdurc:
made when
rcplacing
oscilloæopc
(DC
nngêl
main bærd
TP
(TEOI
l.
2-
3.
4.
5.
6.
Connect
test
point
TP
(ADJ)
and test
point
TP
(TE
I)
to
ground
with
lead wire.
Connect oscilloscope
to test
point
TP
(TEO).
Turn
POWER
switch
on.
Put
disc
(YEDS-I8)
in and
press
>
button.
Adjust
RVl0l
so that the traverse
waveform
is
symmetrical
above
and
below.
After adjustment,
remove
the lead
wire
connected
in step
5.
I
A-g
(within
5%l
VOLT/D|V:
,
V
TIME/DIV:
I ms
Adjustmcnt
Locetion:
main
board
TP
(A.G)
-+
nvt0l
COMPONENT
SIDE
(FRONTI
.tu
-7-