Sony HMD-A230 Service Manual ▷ View online
CHASSIS
SERVICE MANUAL
SPECIFICATIONS
HMD-A230
17VC
AEP Model
Chassis No. SCC-L38F-A
TORINITORON
®
COLOR COMPUTER DISPLAY
´
´
´
´
´
CRT
0.24 mm aperture grille pitch (center)
17 inches measured diagonally
90-degree deflection
FD Trinitron
Viewable image size
Approx. 327 243 mm (w/h)
(12
7
/
8
9
5
/
8
inches)
Viewing image Approx. 406 mm (16.0 inches)
Resolution
Maximum
Horizontal: 1280 dots
Vertical: 1024 lines
Recommended Horizontal: 1024 dots
Vertical: 768 lines
Standard image area
Approx. 312 234 mm (w/h)
(12
3
/
8
9
1
/
4
inches)
Deflection frequency
Horizontal: 30 to 80 kHz
Vertical: 48 to 170 Hz
AC input voltage/current
220 to 240 V, 50-60 Hz, Max. 0.7 A
Power consumption Approx.100 W
Operating temperature
10 ¼C to 40 ¼C
Dimensions
Approx. 418 416 426 mm (w/h/d)
´
´
(16
1
/
2
16
1
/
2
16
7
/
8
inches)
Mass
Approx. 19 kg (41.9 lb)
Plug and Play
DDC2B/DDC2Bi
GTF
Supplied accessories
Power cord (1)
Warranty card (1)
Notes on cleaning the screenÕs surface (1)
This instruction manual
´
1
£
£
£
Preset and user modes
When the monitor receives an input signal, it automatically matches the
signal to one of the factory preset modes stored in the monitorÕs memory 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 monitorÕs frequency range
(horizontal: 30 Ð 80 kHz, vertical: 48 Ð 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.
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.
* 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.
Design and specifications are subject to change without notice.
Power mode
Power consumption
(power)
indicator
normal operation
100 W
green
active off*
3 W
orange
power off
0 W (Approx.)
off
HMD-A230(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-
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 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 suitable. (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 suitable. (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 mount-
ing hardware have been replaced. Be absolutely certain that you have
replaced all the insulators.
replaced 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 recommend their replacement.
and recommend their replacement.
5. Look for parts which, though functioning, show obvious signs of deterio-
ration. Point them out to the customer and recommend their replacement.
6. Check the line cords for cracks and abrasion. Recommend the replace-
ment 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 de-
scribed right.
scribed 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-A230(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 NUM-
BERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE-
MENTS PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS THAT
ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED IN THIS
MANUAL. FOLLOW THESE PROCEDURES WHENEVER CRITI-
CAL COMPONENTS ARE REPLACED OR IMPROPER OPERA-
TION IS SUSPECTED.
PARTS LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE
THESE COMPONENTS WITH SONY PARTS WHOSE PART NUM-
BERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE-
MENTS PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS THAT
ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED IN THIS
MANUAL. FOLLOW THESE PROCEDURES WHENEVER CRITI-
CAL COMPONENTS ARE REPLACED OR IMPROPER OPERA-
TION IS SUSPECTED.
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
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.
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.
HMD-A230(E)
4
POWER SAVING FUNCTION
This monitor meets the power-saving guidelines set by VESA, TCO 99,
and
and
E
NERGY
S
TAR. If no signal is input to the monitor from your
computer, the monitor will automatically reduce power consumption as
shown below.
shown below.
*
1
Figures reflect power consumption when no USB compatible
peripherals are connected to the monitor.
peripherals are connected to the monitor.
*
2
When your computer enters power saving mode, NO SIGNAL appears
on the screen. After a few seconds, the monitor enters power saving
mode.
on the screen. After a few seconds, the monitor enters power saving
mode.
*
3
Deep sleep is power saving mode defined by the Environmental
Protection Agency.
Power mode
Power consumption
*
1
(power)
indicator
normal operation
≤
115 W (without USB operation)
green
active off*
2
(deep sleep)*
3
≤
3 W
orange
power off
0 W (approximately)
off
1