Sony CDP-3100 - Page 51

3-2-1. RF Level Check
Connection
SV-145 board
( B-side )
Oscilloscope
(DC range)
Procedure
(1)
Connect
the
oscilloscope
to
TP8
(RF)
and
TP7
(VC)
of
the
SV-145
board.
(2) Tum on the power switch of CDP-3100.
(3)
Load
the
test
disc
(YEDS-18)
and
press
the
PLAY
key.
(4)
Check
that
the
waveform
on
the
oscilloscope
is
Clear
and
that
the
RF
level
is
appropriate.
A
clear
waveform
means
waveform
(©)
that
is
clear
at
the
center.
RF Signal Waveform
YY)
ARR
Level: 1.2 — Vp-p
VOLTIDIV : 200mV
TIME/DIV : 500ns
20MHz BM LIMITTER : ON
3-2 (E)
3-2-2. E-F Balance Check
Preparation
Turn off the power switch of CDP-3100 and unsolder the
soldered bridge of slit land SL2 of the SV-145 board.
SV-145 board
( B-side )
DiC iB LA
SL2
1
Unsolder the soldered
bridge
Connection
SV-145 board
( B-side )
c
" D BoA Oscilloscope
(ve) (TEO) 1 (DC range)
SV-145 board
Volt/div:500mV
Timesdiv 2ms
Procedure
(1)
Connect
the
oscilloscope
to
TP4
(TEO)
and
TP7
(VC)
of
the
SV-145.board.
(2) Turn on the power switch of CDP-3100.
(3) Load the test disc (YEDS-18).
(4)
Check
that
the
top
and
bottom
of
the
waveform
on
the
oscilloscope
are
symmetrical
in
respect
to
0
V.
Note: Becomes clear when the
sweep time is lengthened
a
+E
A+B20.8Vp-p
(5)
After
checking,
tum
off
the
power
switch
and
provide
slit
land
SL
2
of
the
SV-145
board
with
a
bridge
by
soldering.
CDP-3100