Sony CDP-C75ES - Page 3

CDP-C75ES/C85ES/C705
SAFETY CHECK-OUT MODEL IDENTIFICATION
— Specification Labels — CDP - C75ES
After
correcting
the
original
service
problem,
CDP
-C85ES
©
perform
the
following
safety
check
before
releasing
CDP
-
C705
the set to the customer:
S ONY: MODEL NO. Wt
Check the antenna terminals, metal trim, “metallized”
COMPACT DISC PLAYER
LEAKAGE TEST WML LL
AC leakage. Check leakage as described below.
The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
SERIAL NO.
not exceed 0.5mA (500 microampers). Leakage MADE IN JAPAN
current can be measured by any one of three
methods.
1. A commercial leakage tester, such as the
Simpson 229 or RCA WT-540A. Follow the US, Canadian model: AC 120V 60Hz 13W
manufacturers’ instructions to use these instru- AEP model: AC 220V 50/60Hz 13W
ments. E model: AC 110-120, 220 -—240V 50/60Hz 13W
Australi del: AC 240V — 1
2.
A
battery-operated
AC
milliammeter.
The
Data
Meta
eneMeee
C
240V
—50/60Hz
13W
Precision 245 digital multimeter is suitable for
this job.
3. Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter. The “limit” indication is 0.75 V, so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM that NOTES ON HANDLING THE OPTICAL PICK-
is suitable. Nearly all battery operated digital UP BLOCK OR BASE UNIT
multimeters that have a 2V AC range are
suitable. (See Fig. A) The laser diode in the optical pick-up block may’
suffer electrostatic breakdown because of the poten-
tial difference generated by the charged electrostatic
To Exposed Metal load, etc. on clothing and the human body.
Parts on Set During repair, pay attention to electrostatic break-
down and also use the procedure in the printed
matter which is included in the repair parts.
The flexible board is easily damaged and should be
Ac handled with care.
voltmeter
P| (0.75 V)
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so
as to be focused on the disc reflective surface by the
= Earth Ground objective Jens in the optical pick-up block. There-
fore, when checking the laser diode emission, observe
Using
an
AC
voltmeter
to
check
AC
leakage.
ae
more
than
30
cm
away
from
the
objective
lens.