About The Discs This Unit Can Play - Sony ICF-DVD57TV Service Manual

ICF-DVD57TV
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
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)
To Exposed Metal
Parts on Set
0.15 µ F
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
2
AC
1.5 k Ω
voltmeter
(0.75 V)
Earth Ground
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
About the discs this unit
can play
This unit can play the following discs:
•DVD VIDEO
•DVD-R/DVD+R
•DVD-RW/DVD+RW
•Video CD
•Audio CD
•CD-R/CD-RW
Disc type Label on the disc
DVD Videos
Video CD
Audio CDs
"DVD VIDEO," "DVD-R" and "DVD-RW" are
trademarks.
Discs that this system cannot play
•CD-ROMs
•CD-Rs/CD-RWs other than those recorded in
the following formats:
— music CD format
— video CD format
•Data part of CD-Extras
•Super Audio CDs
•DVD-ROMs
•DVD-RAMs
•DVD Audio discs
•8 cm(3 inches) DVD discs
•Photo Movies created after recording in VR
mode by DVD Handycam.
•Progressive JPEG format file
•Discs with non-standard shapes (e.g., heart,
square, star) cannot be played on this unit.
Attempting to do so may damage the unit.
Do not use such discs.
•A disc with paper or stickers on it
•A disc that has the adhesive, cellophane tape,
or a sticker still left on it.
* A logical format of files and folders on a CD-
ROMs, defined by ISO (International
Organization for standardization).