Sony BDP-BX58 Service Manual page 2

1. Check the area of your repair for unsoldered or poorly-soldered
connections. Check the entire board surface for solder splashes
and bridges.
2. Check the interboard wiring to ensure that no wires are "pinched"
or contact high-wattage resistors.
3. Look for unauthorized replacement parts, particularly transistors,
that were installed during a previous repair. Point them out to
the customer and recommend their replacement.
4. Look for parts which, though functioning, show obvious signs
of deterioration. Point them out to the customer and recommend
their replacement.
5. Check the line cord for cracks and abrasion. Recommend the
replacement of any such line cord to the customer.
6. Check the B+ voltage to see it is at the values specified.
7. Check the antenna terminals, metal trim, "metallized" knobs,
screws, and all other exposed metal parts for AC leakage. Check
leakage as described below.
Parts on Set
0.15µF
Fig. A. Using an AC voltmeter to check AC leakage.
WARNING!!
WHEN SERVICING, DO NOT APPROACH THE LASER
EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS
NECESSARY TO CONFIRM LASER BEAM EMISSION,
BE SURE TO OBSERVE FROM A DISTANCE OF MORE
THAN 25 cm FROM THE SURFACE OF THE OBJEC-
TIVE LENS ON THE OPTICAL PICK-UP BLOCK.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
MARK ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY
NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE-
MENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
1.5kΩ
(0.75 V)
Earth Ground
OR DOTTED LINE WITH
PARTS WHOSE PART
SUR LES
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 ARN NG
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
educe sk
VOM or battery-operated AC voltmeter. The "limit" indication
do not e ose this pparatus
is 0.75V, so analog meters must have an accurate low-voltage
n or moist re.
i e ctr cal sh ck, do not
scale. The Simpson 250 and Sanwa SH-63Trd are examples of a
a inet Refe i g t
passive VOM that is suitable. Nearly all battery operated digital
i ed pe s nnel only
multimeters that have a 2V AC range are suitable (See Fig. A)
e o t lik
CAUTION:
The use of optical instrument with this product will increase eye
CAUTION
hazard
The use o
azar As he
CAUTION
s lu r y D s
Use of controls or adjustments or performance of procedures
armf l t eyes, do not a empt to
isassemble the cabi et. other than those specified herein may result in hazardous radia-
f
tion exposure.
ersonn l nly
This label is located on the laser
protective housing inside the
enclosure.
Unleaded solder
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead
(Caution: Some printed circuit boards may not come printed with
Th s appliance is classi ed as a
C S LA u
the lead free mark due to their particular size.)
CLAS 1 LAS PROD CT
: LEAD FREE MARK
r .
Unleaded solder has the following characteristics. (Except US Canadian E)
• Unleaded solder melts at a temperature about 40°C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350°C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
– 2 –
BDP-BX58/S480/S483/S580
United ing om a d
p l c o r l
A molded p u
BS1363 is t d to this equipment
ri
o y ur safe y nd c nven ence.
d
sup lied n ed to be replaced a 5
AMP fuse approv d by AS A or
B I to BS1362 (i.e , marked with
s b u
If the plug s ppl ed with this
ove I y u l th
cover please c ntact your nearest
For customers in European countries
product. The CLASS 1 LASER PRODUCT
MARKING is located on the rear exterior.
you w l he prevent potential
n g qu e o
environment and hum n he
which could otherw se be caused
by inappro r at
t i T
recycling o this pro u
y c c O ce
you h use ld st sal
pu a ed the prod ct
Disp
.
tt
his
By
pre
elec
the s
a
batt r
wast