SCD-CE595 - Sony Audio Service Manual (repair manual). Page 3

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3
SCD-CE595
SECTION 1
SERVICING NOTES
HOW  TO  OPEN  THE  DISC  TRAY  WHEN  POWER
SWITCH  TURNS  OFF
Insert a tapering driver into the aperture of the unit bottom, and turn
in the direction of arrow.
Use a flat (-) head screwdriver to open the disc tray by manual
operation. (Flat head screwdriver with nominal blade length of
3mm.)
* To close the disc table, turn the driver in the reverse direction.
tapering driver
1
2
Parts No.
MODEL  IDENTIFICATION
– Back Panel –
MODEL
Part No.
US Model
4-255-250-0
[  ]
Canadian Model
4-255-250-1
[  ]
AEP Model
4-255-250-2
[  ]
UK Model
4-255-250-3
[  ]
SAFETY  CHECK-OUT
After correcting the original service problem, perform the following
safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE  TEST
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 not exceed 0.5 mA (500 microamperes.).
Leakage 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 manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data 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 voltmeter. 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 is suitable. Nearly all battery operated
digital multimeters that have a 2 V AC range are suitable.  (See
Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15 
µ
F
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
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