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A-700T
X2F CHASSIS
SERVICE MANUAL
COLOR COMPUTER DISPLAY
N. Hemisphere Model
Chassis No.SCC-L10E-A
A-700T
SPECIFICATIONS
Picture Tube
Video image area
Logical resolution
Physical resolution
Standard image area
Deflection frequency
AC input voltage / current
Dimensions
Mass
Approx. 312 x 234 mm (w/h)
(123/8 x 91/4 inches)
Horizontal: 30 to 70 KHz
Vertical: 50 to 120 Hz
100 to 120 V, 50-60 Hz, 1.8 A (max.)
220 to 240 V, 50-60 Hz, 1.0 A
406 x 426.5 x 451 mm (w/h/d)
(16 x 167/8 x 177/8 inches)
Approx. 18.5 kg (40lbs 13oz)
Design and specifications are subject to change without notice.
0.25 mm aperture grill pitch
17 inches measured diagonally
90-degree deflection
(15.9" maximum viewing image)
Approx. 327 x 241 mm (w/h)
(127/8 x 91/2 inches)
Horizontal: Max. 1280 dots
Vertical: Max. 1024 lines
Horizontal: Max. 1024 dots
Vertical: Max. 768 lines


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A-700T
State
Power
Required
u Power indicator
POWER SAVING
consumption
resumption time
indicator
MODE
1
2
3
4
5
6
7
Resolution(H x V)
Dot Clock(MHz)
Hor. Freq. (kHz)
H-Total
H-Blanking
H-Front Porch
H-Sync.
H-Back Porch
H-Active
(
µsec)
Ver. Freq. (Hz)
V-Total
V-Blanking
V-Front Porch
V-Sync.
V-Back Porch
V-Active
(lines)
HORIZONTAL
VERTICAL
SYNC.
Int(G)
Ext (H/V)/Polarity
Ext (CS)/Polarity
Int / Non Int
Non Int
Non Int
Non Int
Non Int
Non Int
Non Int
Non Int
No
Yes -/-
No
No
Yes +/+
No
No
Yes +/+
No
No
Yes -/-
No
No
Yes +/+
No
No
Yes +/+
No
POWER SAVING FUNCTION
This monitor meets the power saving guidelines set
by the EPA Energy Star Program as well as the more
stringent TC092 guidelines (NUTEK). It is capable of
reduced power consumption when used with a com-
puter equipped with Display Power Management Sig-
naling (DPMS). By sensing the absence of the sync
signal coming from the computer, it will reduce the
power consumption as follows:
< 15W
approx. 3 sec.
green on
orange on
< 15W
approx. 3 sec.
green on
orange on
Suspend
(2nd step of power saving)
Stand-by
1st step of power saving)
Normal Operation
< 110W
green on
off
< 8W
approx. 10 sec.
off
orange on
1
2
3
4
The Power Saving function will automati-
cally put the monitor into Active-off state
if the power switch is turned on without
any video signal input. Once the horizon-
tal and vertical syncs are sensed, the moni-
tor will automatically return to its Normal
operation state.
CAUTION:
TIMING SPECIFICATION
640 x 480
25.175
31.469
31.778
6.356
0.636
3.813
1.907
25.422
59.940
525
45
10
2
33
480
800 x 600
49.500
46.875
21.333
5.172
0.323
1.616
3.232
16.162
75.000
625
25
1
3
21
600
800 x 600
56.250
53.674
18.631
4.409
0.569
1.138
2.702
14.222
85.061
631
31
1
3
27
600
832 x 624
57.283
49.725
20.111
5.586
0.559
1.117
3.910
14.524
74.550
667
43
1
3
39
624
1024 x 768
78.750
60.023
16.660
3.657
0.203
1.219
2.235
13.003
75.029
800
32
1
3
28
768
1280 x 1024
108.000
63.981
15.630
3.778
0.444
1.037
2.296
11.852
60.020
1066
42
1
3
38
1024
1024 x 768
94.500
68.677
14.561
3.725
0.508
1.016
2.201
10.836
84.997
808
40
1
3
36
768
No
Yes +/+
No
Active-off
(3rd step of power saving)


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A-700T
SAFETY CHECK-OUT
(US Model only)
After correcting the original service problem, perform
the following safety checks before releasing the set to the
customer:
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 microampere).
Leakage current can be measured by any one of three methods.
WARNING!!
WARNING!!
WARNING!!
WARNING!!
WARNING!!
NEVER TURN ON THE POWER IN A CONDITION IN WHICH THE
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 APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS
THAT ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED
IN THIS MANUAL. FOLLOW THESE PROCEDURES WHENEVER
CRITICAL COMPONENTS ARE REPLACED OR IMPROPER
OPERATION IS SUSPECTED.
AVERTISSEMENT!!
NE JAMAIS METTRE SOUS TENSION OUAND LA BOBINE DE
DEMAGNETISATION EST ENLEVEE.
ATTENTION AUX COMPOSANTS RELATIFS A LA
SECURITE!!
LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET PAR UNE
MARQUE
¡ SUR LES SCHEMAS DE PRINCIPE, LES VUES
EXPLOSEES ET LES LISTES DE PIECES SONT D'UNE
IMPORTANCE
CRITIQUE
POUR
LA
SECURITE
DU
FONCTIONNEMENT. NE LES REMPLACER QUE PAR DES
COMPOSANTS SONY DONT LE NUMERO DE PIECE EST
INDIQUE DANS LE PRESENT MANUEL OU DANS DES SUPPLE-
MENTS PUBLIES PAR SONY. LES REGLAGES DE CIRCUIT
DONT
L'IMPORTANCE
EST
CRITIQUE
POUR
LA
SECURITE DU FONCTIONNEMENT SONT IDENTIFIES DANS
LE PRESENT MANUEL. SUIVRE CES PROCEDURES LORS DE
CHAQUE REMPLACEMENT DE COMPOSANTS CRITIQUES, OU
LORSQU'UN MAUVAIS FONTIONNEMENT SUSPECTE.
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. 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.
4. Look for unauthorized r eplacement parts,
particularly transistors, that were installed during
a previous repair. Point them out to the customer
and recommend their replacement.
5. Look for parts which, though functioning, show
obvious signs of deterioration. 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.
8. Check the antenna terminals, metal trim,
"metallized" knobs, screws, and all other exposed
metal parts for AC Leakage. Check leakage as
described below.
1. A commercial leakage tester, such as the Simpson 229 or
RCA WT-540A. Follow the manufacturers' instructions to
use these instructions.
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's 250 and Sanwa
SH-63Trd are examples of passive VOMs that are suitable.
Nearly all battery operated digital multimeters that have a
2V AC range are suitable. (See Fig. A)
1.5 k
0.15 µF
AC
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.


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A-700T
TABLE OF CONTENTS
Section
Title
Page
1. GENERAL ................................................................................... 5
2. DISASSEMBLY
2-1. Cabinet Removal ............................................................8
2-2. Service Position .............................................................. 8
2-3. D Board Removal ........................................................... 8
2-4. Picture Tube Removal ................................................... 9
3. SAFETY RELATED ADJUSTMENT................................. 10
4. ADJUSTMENTS ........................................................................ 11
5. DIAGRAMS
5-1. Block Diagram ................................................................15
5-2. Circuit Boards Location ................................................. 18
5-3. Schematic Diagrams and Printed Wiring Boards ...... 18
1. D Board - Schematic Diagram ................................. 19
2. A Board - Schematic Diagram ................................. 23
5-4. Semiconductors ..............................................................27
6. EXPLODED VIEWS
6-1. Chassis ............................................................................ 29
6-2. Packing Materials .......................................................... 30
7. ELECTRICAL PARTS LIST ................................................ 31


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5
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A-700T
4
Adjustments
A number of digital controls are provided to allow you to
optimize the display parameters to your preferences.
You can adjust the picture to your preferences by following
the procedure described below.
You can adjust all items on the OSD (On Screen Display).
POWER
SAVING
Push this part to open the control panel cover.
p
Adjustments will be stored automatically.
p
The OSD automatically disappears 3 seconds after you
release the buttons.
Control Panel
Contrast
The adjustment data becomes the common setting for all
input signals.
1 Press the >+/­ button.
The > OSD (On Screen Display) appears.
2 Press the >+/­ button to adjust picture contrast.
+ .... for more contrast
­ .... for less contrast
Horizontal centering
The adjustment data becomes the unique setting for the
input signal received.
1 Press the S/i button.
The S OSD (On Screen Display) appears.
2 Press the S/i button.
... to move right
i ... to move left
Brightness
The adjustment data becomes the common setting for all
input signals.
1 Press the ¨+/­ button.
The ¨ OSD (On Screen Display) appears.
2 Press the ¨+/­ button to adjust picture brightness.
+ .... for more brightness
­ .... for less brightness
Vertical centering
The adjustment data becomes the unique setting for the
input signal received.
1 Press the s/ button.
The s OSD (On Screen Display) appears.
2 Press the s/ button.
... to move up
... to move down
POWER
SAVING
RESET
3
EN
Installation
· Prevent internal heat buildup by allowing adequate air
circulation. Do not place the unit on surfaces (rugs,
blankets, etc.) or near materials (curtains, draperies) that
may block the ventilation holes.
· Do not install the unit near heat sources such as radiators
or air ducts, or in a place subject to direct sunlight,
excessive dust, mechanical vibration or shock.
· Do not place the unit near equipment that generates
magnetism, such as a converter or high-voltage power
lines.
Maintenance
Clean the cabinet, glass panel, and controls with a soft cloth,
lightly moistened with a mild detergent solution. Do not use
any type of abrasive pad, scouring powder, or solvent, such
as alcohol or benzine.
Transportation
When you transport this monitor for repairing or shipping,
use the original carton box and packing materials.
Table of Contents
Precautions ............................................................................... 3
Getting Started ......................................................................... 3
Adjustments .............................................................................. 4
Power Saving Function ........................................................... 6
Plug and Play ........................................................................... 6
Damper Wire .......................................................................... 6
Use of the Tilt-Swivel ............................................................ 7
Specifications .......................................................................... 7
Troubleshooting ..................................................................... 7
Precautions
Warning on Power Connection
· Use the supplied power cord.
Before using this monitor, make sure that the following
items are included in your package:
the monitor, power cord and this operating instruction
manual.
This monitor will sync to platforms running at horizontal
frequencies between 30 and 70 kHz.
Connecting the Computer
Step 1: With the computer switched off, attach the video
signal cable to the video output.
Step 2: Attach the power cord to the monitor and then to
the power outlet.
Step 3: Turn on the monitor and computer.
Step 4: If necessary, adjust the user controls according to
your personal preference.
The installation is complete.
Computer
to the video output
Power cord (supplied)
to the power
outlet
Getting Started
for 220 to 240 V AC
for 100 to 120 V AC
For the customers in U.S.A.
If you do not do this, this monitor will not conform to
mandatory FCC standards.
· Before disconnecting the power cord, wait for at least
30 seconds after turning off the power switch to allow for the
discharging of static electricity on the CRT display surface.
· After the power has been turned on, the CRT is
demagnetized for approximately 5 seconds. This
generates a strong magnetic field around the bezel, which
may affect the data stored on magnetic tape or disks near
the bezel. Place such magnetic recording equipment and
tapes/disks at a distance from this unit.
The socket-outlet shall be installed near the equipment
and shall be easily accessible.
The instructions given here are partial abstracts from the Operating Instruction
Manual. The page numbers shown reflect those of the Operating Instruction Manual.
SECTION 1
GENERAL