Read Sony HMD-A440 Service Manual online
CHASSIS
SERVICE MANUAL
SPECIFICATIONS
HMD-A440
19VC
US Model
Canadian Model
Chassis No. SCC-L38F-A
TORINITORON
®
COLOR COMPUTER DISPLAY
×
×
×
×
×
CRT
0.24 mm aperture grille pitch (center)
19 inches measured diagonally
90-degree deflection
FD Trinitron
19 inches measured diagonally
90-degree deflection
FD Trinitron
Viewable image size
Approx. 365 274 mm (w/h)
(14
(14
3
/
8
10
7
/
8
inches)
Viewing image
Approx. 456 mm (18 inches)
Resolution
Maximum
Horizontal: 1920 dots
Vertical: 1440 lines
Vertical: 1440 lines
Recommended
Horizontal: 1280 dots
Vertical: 1024 lines
Vertical: 1024 lines
Standard image area
Approx. 352 26 4 mm (w/h)
(12
(12
7
/
8
10
3
/
4
inches)
Deflection frequency
Horizontal: 30 to 96 kHz
Vertical: 48 to 170 Hz
Vertical: 48 to 170 Hz
AC input voltage/current
100 -
120 V, 50 -60 Hz, Max. 2.0 A
Power consumption Approx.130 W
Operating temperature
Operating temperature
10
°
C to 40
°
C
Dimensions
Approx. 461 479 471 mm (w/h/d)
×
×
(18
1
/
8
19
1
/
8
18
1
/
2
inches)
Mass
Approx. 26 kg (57 lb)
Plug and Play
DDC2B/DDC2Bi
GTF
GTF
×
Supplied accessori
*
Recommended horizonal and vertical timing condition
•
Horizontal sync width should be more than 1.0
µ
sec.
•
Horizontal blanking width should be more than 3.0
µ
sec.
•
Vartical blanking width should be more than 500
µ
sec.
Design and specifications are subject to change without notice.
es
Power cord (1)
Warranty card (1)
Instruction Manual (1)
Warranty card (1)
Instruction Manual (1)
Preset and user modes
When the monitor receives an input signal, it automatically
matches the signal to Provide a high quality picture.
For input signals that do not match one of the factory preset
modes, the digital Multiscan technology of this monitor ensures
that a clear picture appears on the screen for any timing in the
monitor s frequency range (horizontal: 30 — 96 kHz, vertical:
48 — 170 Hz). If the picture is adjusted, the adjustment data is
stored as a user mode and automatically recalled whenever the
same input signal is received.
matches the signal to Provide a high quality picture.
For input signals that do not match one of the factory preset
modes, the digital Multiscan technology of this monitor ensures
that a clear picture appears on the screen for any timing in the
monitor s frequency range (horizontal: 30 — 96 kHz, vertical:
48 — 170 Hz). If the picture is adjusted, the adjustment data is
stored as a user mode and automatically recalled whenever the
same input signal is received.
HMD-A440(E)
2
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.
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 mul-
timeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM or bat-
tery-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 VOMs that are suitable. Nearly
all battery operated digital multimeters that have a 2 V AC range are suit-
able. (See Fig. A)
meters must have an accurate low-voltage scale. The Simpson 250 and
Sanwa SH-63Trd are examples of a passive VOMs that are suitable. Nearly
all battery operated digital multimeters that have a 2 V AC range are suit-
able. (See Fig. A)
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 for unsoldered or poorly-soldered connec-
checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly-soldered connec-
tions. Check the entire board surface for solder splashes and bridges.
2. Check the interboard wiring to ensure that no wires are “pinched” or con-
tact high-wattage resistors.
3. Check that all control knobs, shields, covers, ground straps, and mounting
hardware have been replaced. Be absolutely certain that you have replaced
all the insulators.
all the insulators.
4. Look for unauthorized replacement parts, particularly transistors, that were
installed during a previous repair. Point them out to the customer and rec-
ommend their replacement.
ommend their replacement.
5. Look for parts which, though functioning, show obvious signs of deteriora-
tion. Point them out to the customer and recommend their replacement.
6. Check the line cords for cracks and abrasion. Recommend the replacement
of any such line cord to the customer.
7. Check the B+ and HV to see if they are specified values. Make sure your
instruments are accurate; be suspicious of your HV meter if sets always
have low HV.
have low HV.
8. Check the antenna terminals, metal trim, “metallized” knobs, screws, and
all other exposed metal parts for AC Leakage. Check leakage as described
right.
right.
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15
µ
F
AC
Voltmeter
(0.75 V)
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Parts on Set
Earth Ground
SAFETY CHECK-OUT
HMD-A440(E)
3
WARNING!!
NEVER TURN ON THE POWER IN A CONDITION IN WHICH THE
DEGAUSS COIL HAS BEEN REMOVED.
DEGAUSS COIL HAS BEEN REMOVED.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK
!
ON THE
SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS
LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS AP-
PEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY. CIRCUIT ADJUSTMENTS THAT ARE CRITICAL
FOR SAFE OPERATION ARE IDENTIFIED IN THIS MANUAL. FOL-
LOW THESE PROCEDURES WHENEVER CRITICAL COMPO-
NENTS ARE REPLACED OR IMPROPER OPERATION IS SUS-
PECTED.
LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS AP-
PEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY. CIRCUIT ADJUSTMENTS THAT ARE CRITICAL
FOR SAFE OPERATION ARE IDENTIFIED IN THIS MANUAL. FOL-
LOW THESE PROCEDURES WHENEVER CRITICAL COMPO-
NENTS ARE REPLACED OR IMPROPER OPERATION IS SUS-
PECTED.
AVERTISSEMENT!!
NE JAMAIS METTRE SOUS TENSION QUAND LA BOBINE DE
DEMAGNETISATION EST ENLEVÉE.
DEMAGNETISATION EST ENLEVÉE.
ATTENTION AUX COMPOSANTS RELATIFS À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE TRAME ET UNE MARQUE
!
SONT CRITIQUES POUR LA SÉCURITÉ. NE LES REMPLACER QUE
PAR UNE PIÈCE PORTANT LE NUMÉRO SPECIFIÉ. LES RÉGLAGES
DE CIRCUIT DONT L’IMPORTANCE EST CRITIQUE POUR LA
SÉCURITÉ DU FONCTIONNEMENT SONT IDENTIFIÉS DANS LE
PRÉSENT MANUEL. SUIVRE CES PROCÉDURES LORS DE
CHAQUE REMPLACEMENT DE COMPOSANTS CRITIQUES, OU
LORSQU’UN MAUVAIS FONCTIONNEMENT EST SUSPECTÉ.
DE CIRCUIT DONT L’IMPORTANCE EST CRITIQUE POUR LA
SÉCURITÉ DU FONCTIONNEMENT SONT IDENTIFIÉS DANS LE
PRÉSENT MANUEL. SUIVRE CES PROCÉDURES LORS DE
CHAQUE REMPLACEMENT DE COMPOSANTS CRITIQUES, OU
LORSQU’UN MAUVAIS FONCTIONNEMENT EST SUSPECTÉ.
HMD-A440(E)
4
POWER SAVING FUNCTION
This monitor meets the power-saving guidelines set by VESA,
E
NERGY
S
TAR, and NUTEK. If no signal is received by the monitor from your
computer, the monitor will automatically reduce power consumption as
shown below.
shown below.
*
Power mode
Power consumption
(power)
indicator
normal operation
≤
130 W
green
active off*
≤
3 W
orange
power off
0 W (Approx.)
off
1
When your computer is in active off mode, MONITOR IS IN POWER
SAVE MODE appears on the screen if you press any button on the
monitor. After a few seconds, the monitor enters the power saving
mode again.
SAVE MODE appears on the screen if you press any button on the
monitor. After a few seconds, the monitor enters the power saving
mode again.
