Sony BDP-BX1 Service Manual page 2

BDP-BX1/S350
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
1. Check the area of your repair forunsoldered orpoofly-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.
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 0.75V, 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 2V AC range are suitable. (See
Fig. A)
To Exposed Metal
Parts on Set
0.15pF
T
1.5 k_
i
m Earth Ground
AC
voltmeter
(0.75 V)
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 WARNINGH
COMPONENTS IDENTIFIED BY MARK z_ OR DOTTED LINE
WITH MARK z_ 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.
ATTENTION AU COMPOSANT AYANT RAPPORT
.&. LA SECURITE!
LES COMPOSANTS IDENTIFIF:S PAR UNE MARQUE z_
SUR LES DIAGRAMMES SCHF:MATIQUES ET LA LISTE
DES PI#CES SONT CRITIQUES POUR LA SECURITE DE
FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS
QUE PAR DES PI#CES SONY DONT LES NUMEROS SONT
DONNF:S DANS CE MANUEL OU DANS LES SUPPLE-
MENTS PUBLIES PAR SONY.
CAUTION:
The use of optical instrument with this product will increase eye
hazard.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radia-
tion exposure.
OJ*gTI0blC{_S3_'4SISLE_N I 'IqlBL£bS_ab01_ll0 A _'s'Erl,
¢,,,'01DDIAEC; E D2C%U E
k_ORSIOI_SS31aCIBRI)_SICII;IP,-#bSP,_NSZ_
Gg A f._lt L_:_ N&l G _l_0 &_ _ _HI:EL
AOV_ S L S_LI 0G gS% LI( L_ RST?]¢I4 I,F _L_SE 2_ ,'E#_NI[I(.
D [J£[ I PASIA i.
IO',/A_S[I S_ LIC O; dS_LIG_SE£SI_IALH_;I L_;SF 3R_A _EL _Pf_ES
_{g', I KJ EKSP0t, RNS !'!Etl.
VARHN_
'1 _ _LI, N I _' a XP01F_r)C0_E_ # Si!_ALNI4G _,
','_RO
This label is located on the laser
proleclive housing inside the
enclosure.
CLASS 1 LASER PRODUCT
LASER KLASSE 1
LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT
This appliance is classified as a
CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT
MARKING is located on the laser
protective housing inside the
enclosure.
(Except US, Canadian. E)
Unleaded solder
Boards requiring use of unleaded solder are printed with the lead-
tree mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead tree mark due to their particular size.)
:LEAD FREE MARK
Unleaded solder has the following characteristics.
• 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 tbr 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-