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Extracted text from sony hcd dx 255 service manual (Ocr-read)
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HCD-DX155/DX255
MODEL IDENTIFICATION
-“ Rear Panel -“
Model Part No.
DX155 : US model 2-661-240-0[]
DX255 : US model 2-661-240-1[]
DX155 : SP model 2-661-240-2[]
DX155 : MX model 2-661-240-3[]
DX155 : CND model 2-661-240-4[]
DX255 : CND model 2-661-240-5[]
DX155 : AUS model 2-661-240-6[]
DX155 : E3 model 2-661-240-7[]
-Abbreviation
AU S: Australian model
CND : Canadian model
E3 : 240V AC area in E model
MX : Mexican model
SP : Singapore model
*D epending on the sound field settings and the source,
there may be no sound output.
Inputs
TV/V CR (AUDIO IN) Sensitivity: 450/250 mV
AUDIO IN/MIC Sensitivity: 250/125 mV
Outputs (Analog)
Phones Accepts low-and high- impedance headphones.
DVD systemLaser Sem iconductor laser
(DVD: λ = 650 nm)
(CD: λ = 790 nm)
Emission duration:
conti nuous
Si gnal format system
North American, Latin, and Mexican models:
NTSC
Ot her models: NTSC/PAL
Tu ner sectionSystem PLL quartz-locked digital
synthesizer system
FM tuner section
Tuning range
North American models: 87.5 -“ 108.0 MHz
(100 kHz step)
Other mo dels: 87.5 -“ 108.0 MHz
(50 kHz step)
Antenna (aerial) FM wire antenna (aerial)
An tenn a (aerial) terminals 75 ohms, unbalanced
Inte rmediate frequency 10.7 MHz
AM t uner section
Tuning range
Middle Eastern models: 531-1,602 kHz (with the interval set at 9 kHz)
Asian models: 531-1,602 kHz (with the interval set at 9 kHz)
530-1,710 kHz (with the
interval set at 10 kHz)
North American and Latin American models: 530-1,710 kHz (with the
interval set at 10 kHz)
531-1,710 kHz (with the
interval se t at 9 kHz)
Antenna (aerial) AM loop antenna (aerial)
Inte rmediate frequency 450 kHz
Video sectionOutputs V
S VIDEO:
Y: 1 Vp-p 75 ohms
C: 0.286 Vp-p 75 ohmsID
EO: 1 Vp-p 75 ohms
COMPONENT:
Y: 1 Vp-p 75 ohms
PB/CB, PR/CR: 0.7 Vp-p
75 ohms
Other models:
Stereo mode (rated) 108 W + 108 W (3 ohms at
1 kHz, 1 % THD)
Surround mode (reference)
RMS output power, 10 %
THD
Front: 143 W + 143 W
(with SS-TS52)
Center*: 143 W
(with SS-CT51)
Surround*: 143 W + 143
W
(with SS-TS51)
Subwoo fer*: 285 W
(with SS-WS52B)
General
Power requirements
North American and Mexican models: 120 V AC, 60 Hz
Latin American models: 110 -“ 240 V AC, 50/60 Hz
Other models: 220 -“ 240 V AC, 50/60 Hz
Power consumption On: 140 W (Latin
American models of
DX1 55), 150 W
(Mexican and other models
of DX155), 160 W (DX255)
Standby: 0.3 W (at the
Power Saving mode)
Dimens ions (approx.) 430 × 86 × 418 mm
( 17 ×3
1/2 × 16 3/4 inches)
(w/h/d) incl. projecting
parts
Mass (approx.) 5.0 kg (11 lb 1 oz)
Design and specifications are subject to change
without notice.
COAXIAL
AM
FM75 SPEAKER FRONT R FRONT L SUR R SUR L CENTER WOOFER COMPONENT VIDEO OUT TV/VCR MONITOR OUT
ANTENNA
(DVD ONLY )YPB/CBPR/CR RLAUDIO I N
VIDEO
(DVD ONLY ) S VIDE O
Par
ts No.
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HCD-DX155/DX255
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
the lead free 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 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 viscou-s (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. 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.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
This appliance is classified as
a CLASS 1 LASER product.
This marking is located on
the bottom exterior.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
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.
ATTENTION AU COMPOSANT AYANT RAPPORT
Ã- LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT
DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
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)
1.5 k -„¦ 0.15 µF AC
voltmete r (0.75 V) To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.