Sony CDP-400 - Electrical Adjustments

3-
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2, ELECTRICAL ADJUSTMENTS
. Perform adjustments in the order given.
. Use YEDS-1 disc unless otherwise indicated.
Part No. of YEDS-1: 3-703-696-01
. Set the unit horizontal.
| CDP-400/501/501ES/610ES
CDP-400/501/501ES/610ES
|
I
!
-—————
Adjustment Mode
1. Connect servo amp board test points TP2 and TP4.
' This is to prevent the disc table from opening
(ee though pits are not read, by making micro-
computer ICIO1 pin 63 low.
2. Tum POWER switch on.
(To reset microcomputer.)
After adjustment, remove the lead wire connect-
ing test points TP2 and TP4.
Adjustment Location: Servo amp board
Connect TP2
and TP4.
—
RF Offset Adjustment
Procedure:
oscilloscope or VOM
{DC range)
audio amp board C)
ee
TP3 O<m———-—-O +
oes -
{ground point)
1. Turn POWER switch on. (STOP mode)
test points TP3 and TP4 (ground point).
ing is DC -0.4+0.1 V.
Adjustment Location: Audio amp board
TP4
(GND) RV407
2. Connect oscilloscope or VOM to audio amp board
3: Adjust RV407 so that oscilloscope or VOM read-
Tracking Offset Adjustment
Procedure:
oscilloscope or VOM
{OC range}
audio amp board OC)
REED
TP2 Ct) +
: I
TP4 Ot———-——© -
(ground point)
1. Turn POWER switch on. (STOP mode)
. Connect oscilloscope or VOM to audio amp board
test points TP2 and TP4 (ground point).
3. Adjust RV402 so that oscilloscope or VOM read-
ingisDCO0+0.1V.
to
Adjustment Location: Audio amp board
TP2 RV402
AN
as
mee
\
TP4 (GND)