Sony SDM-X82 User manual

SERVICE MANUAL
SPECIFICATIONS
SDM-X82
TFT LCD Color Computer Display
US Model
Canadian Model
AEP Model
LCD panel Panel type: a-Si TFT Active Matrix
Picture size: 18.1 inch
Input signal format RGB operating frequency*
Horizontal: 28 – 92 kHz
Vertical: 56 – 85 Hz
Resolution Horizontal: Max.1280 dots
Vertical: Max.1024 lines
Input signal levels Analog RGB video signal
0.7 Vp-p, 75 Ω, positive
SYNC signal
TTL level, 2.2 kΩ,
positive or negative
(Separate horizontal and vertical,
or composite sync)
0.3 Vp-p, 75Ω, negative
(Sync on green)
Digital RGB (DVI) signal: TMDS
(Single link)
Power requirements 100 – 240 V, 50 – 60 Hz,
Max. A
1.2
Power consumption Max. 58 W
Operating temperature 5 – 35
° C
Dimensions (width/height/depth)
Display (upright):
Approx. 450 ×424 ×241 mm
(17 3/
4
×16 3/
4
×9 1/
2
inches)
(with stand)
Approx. 450 ×368 ×90 mm
(17 3/
4 ×14 1/ 2 ×3 5/ 8 inches)
(without stand)
Mass Approx. 8.2 kg (18 lb 15 oz) (with
stand)
Approx. 6.5 kg (14 lb 5 oz)
(without stand)
Plug & Play DDC2B
* Recommended horizontal and vertical timing condition
•Horizontalsyncwidthdutyshouldbemorethan4.8% oftotal
horizontal time or 0.8 µs, whichever is larger.
•Horizontal blanking width should be more than 2.5 µsec.
•Vertical blanking width should be more than 450 µsec.
Design and specifications are subject to change without notice.

SDM-X82(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. 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 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
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 replacement 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 connector shell, metal trim, “metallized” knobs, screws, and
all other exposed metal parts for AC Leakage. Check leakage as de-
scribed right.
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µFAC Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
SAFETY CHECK-OUT

SDM-X82(E) 3
WARNING!!
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 ADJUST-
MENTS THAT ARE CRITICAL FOR SAFE OPERATION ARE
IDENTIFIED IN THIS MANUAL. FOLLOW THESE PROCEDURES
WHENEVER CRITICAL COMPONENTS ARE REPLACED OR IM-
PROPER OPERATION IS SUSPECTED.
AVERTISSEMENT!!
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 DECIRCUIT DONT L’IMPORTANCEEST
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.

SDM-X82(E) 4
POWER SAVING FUNCTION
AUTOMATIC PICTURE QUALITY ADJUSTMENT
FUNCTION
(ANALOG RGB)
This monitor meets the power-saving guidelines set by VESA,
E NERGY S TAR, and NUTEK. If the monitor is connected to a
computer or video graphics board that is DPMS (Display Power
Management Signaling) compliant, the monitor will
automatically reduce power consumption as shown below.
* When your computer enters the “active off” mode, the input signal is
cut and NO INPUT SIGNAL appears onthe screen. After 10 seconds,
the monitor enters the power saving mode.
** “Deep sleep” is a power saving mode defined by the Environmental
Protection Agency.
Note
If the (POWER SAVE) is setto OFF (page 16), the monitor does not
enter the power saving mode.
Power mode Power consumption 1(power)
indicator
normal
operation 58 W (max.) green
active off*
(deep sleep)** 3 W (max.) orange
1(power) off 1 W red
main power off 0 W off
ZZ...
When the monitor receives an input signal, it
automatically adjusts the picture’s position and
sharpness (phase/pitch), and ensures that a clear
picture appears on the screen.
The factory preset mode
When the monitor receives an input signal, it automatically
matches the signal to one of the factory preset modes stored in the
monitor’s memory to provide a high quality picture at the center
of the screen. If the input signal matches the factory preset mode,
the picture is appears on the screen automatically with the
appropriate default adjustment.
If input signals do not match one of the factory
preset modes
When the monitor receives an input signal, the automatic picture
quality adjustment function of this monitor is activated and
ensures that a clear picture always appears on the screen (within
the following monitor frequency ranges):
Horizontal frequency: 28 –92 kHz
Vertical frequency: 56 –85 Hz
Consequently, the first time the monitor receives input signals
that do not match one of the factory preset modes, the monitor
may take a longer time than normal for displaying the picture on
the screen. This adjustment data is automatically stored in
memory so that next time, the monitor will function in the same
way as when the monitor receives the signals that match one of
the factory preset modes.
If you adjust the phase, pitch, and pictures
position manually
For some input signals, the automatic picture quality adjustment
function of this monitor may not completely adjust the picture
position, phase, and pitch. In this case, you can manually set these
adjustments (page 13). If you manually set these adjustments,
they are stored in memory as user modes and automatically
recalled whenever the monitor receives the same input signals.

SDM-X82(E) 5
1. DISASSEMBLY
1-1. Rear Cover and Cabinet Assy Removal ............... 1-1
1-2. H Board Removal ................................................ 1-2
1-3. I Board Removal .................................................. 1-3
1-4. A Board Removal ................................................ 1-4
1-5. G Board Removal ................................................. 1-5
1-6. U Board and LCD Unit Removal ......................... 1-6
1-7. LCD Panel Removal ............................................. 1-7
2. ADJUSTMENTS
2-1. Service Functions of Buttons in Front Panel ........ 2-1
2-2. Usea of Service Mode .......................................... 2-2
2-3. Functions of Service Mode .................................. 2-3
2-4. White Balance Adjustment .................................. 2-3
2-5. Action after Replacing
the LCD Module and Board.................................. 2-5
TABLE OF CONTENTS
Section Title Page Section Title Page
3. DIAGRAMS
3-1. Block Diagrams .................................................... 3-1
3-2. Circuit Boards Location........................................ 3-2
3-3. Schematic Diagrams and Printed Wiring Boards.. 3-2
(1)Schematic Diagram
of A(a,b,c,d,e,f,g,h) Board. ........ 3-4
(2)Schematic Diagram of H Board. ...................... 3-13
(3)Schematic Diagram of I Board......................... 3-15
(4)Schematic Diagram of G Board. ...................... 3-17
(5)Schematic Diagram of U Board. ...................... 3-19
4. EXPLODED VIEWS
4-1. Chassis ................................................................. 4-2
4-2. Packing Materials ................................................. 4-3
5. ELECTRICAL PARTS LIST ............................... 5-1

SDM-X82(E) 1-1
SECTION 1
DISASSEMBLY
1-1. REAR COVER AND CABINET ASSY REMOVAL
1Rear cover
4Cabinet assy
3Four screws
(+PWH 3X12)
2Four screws
(+PSW 4X10)
Protection sheet

SDM-X82(E) 1-2
1-2. H BOARD REMOVAL
CN101
3H Board
2Three screws
(+PTP 3X8)
1Connector

SDM-X82(E) 1-3
1-3. I BOARD REMOVAL
5I Board
1Screw
(+PWH 3X6)
4Screw
(+PWH 3X6)
3Connector
CN06
3Connector
CN05
3Connector
CN07
3Connector
CN04 3Connector
CN01
3Connector
CN03
2Connector
CN02
2Inverter shield

SDM-X82(E) 1-4
1-4. A BOARD REMOVAL
1Four screws
(+PWH 3X6)
5Two screws
(+PWH 3X6) 4Connector
CN801
2Interface shield
3Six connector screw
6A Board
4Connector
CN201
4Connector
CN303
4Connector
CN202
4Connector
CN501

SDM-X82(E) 1-5
1-5. G BOARD REMOVAL
3Connector
CN102
3Connector
CN203
3Connector
CN101
5G Board
1Two screws
(+PWH 3X6)
4Screws
(+PWH 3X6)
2Power shield

SDM-X82(E) 1-6
1-6. U BOARD AND LCD UNIT REMOVAL
4LCD UNIT
1Connector
CN851
5Connector
CN852
7U Board
3Two screw
(+RKTP 4x10)
3Two screw
(+RKTP 4x10)
2Screw
(+P 3x6)
6Screw
(+PTP 3x8)

SDM-X82(E) 1-7
1-7. LCD PANEL REMOVAL
1LCD panel
1Two screws
(+P 3X6)
1Two screws
(+P 3X6)

SDM-X82(E) 2-1
SECTION 2
ADJUSTMENTS
2-1. Service Functions of Buttons in Front Panel
The following functions are available for servicing the set.
1. To display the model information
Press the MENU button for five seconds or more in the ordinary power-on state,
and the following information is displayed on the screen:
- Model name
- Serial number
- Manufactured year and week
This function is described in the instruction manual also.
2. To display ETI (Elapsed Time Indicator)
Press the OK button for five seconds or more in the ordinary power-on state, and
the cumulative power-on time excluding the power-off and power saving state is
displayed on the screen.
3. All mode recall
Press the POWER button with pressing the OK button in the power-off state, and
the user memory is completely cleared and the system is reset to the factory setting.
This reset is similar to RESET in the OSD menu, but differs from it in the
following:
- The NO SYNC AGING flag is cleared.
- LANGUAGE is set to ENGLIDH.
- INPUT is set to INPUT1: DVI-D.
4. To set the NO SYNC AGING flag
Press the POWER button with pressing the UP (↑) button in the power-off
state, and the NO SYNC AGING flag is set. In this setting, when the input with no
input signal is selected, the system goes into the AGING mode.
The NO SYNC AGING flag is held until it is cleared. To clear the NO SYNC
AGING flag, go into the service mode and then set the AGING mode to OFF, or
execute the all mode recall.
5. To enter the service mode
Press the POWER button with pressing the UP (↑) and DOWN (↓)
buttons in the power-off state, and the system is set to the service mode. The service
mode will be explained later.
To exit from the service mode, turn off the power.
6. To copy EDID to the EEPROM and to clear ETI
Press the POWER button with pressing the UP (↑) and OK buttons in the
power-off state, and the data for the model information are copied to the EEPROM
for the internal microcontroller from EDID of INPUT2: HD15, and the model
information display is made correct.
When replacing the A board, this operation is required after writing EDID and at
the same time ETI is reset to 0.
7. To enter the ISP mode
Turn on the MAIN POWER switch with pressing the DOWN (↓) button in the
main-power-off state, and the system enters the ISP mode. The POWER LED goes
off, and both input LED's 1 and 2 light on, and the picture disappears, and any
button becomes invalid.
In the ISP mode, the internal software can be updated with an external personal
computer using a special fixture.
To cancel the ISP mode, turn off the MAIN POWER switch.

SDM-X82(E) 2-2
2-2. Uses of Service Mode
1. Turn off the power with the POWER button in the front panel. The red POWER
LED lights on.
2. Press the POWER button in the front panel with pressing the UP (↑) and
DOWN (↓) buttons, and the system enters the service mode.
When no signal is input to the selected input terminal, the following functions are
disabled.
3. Press the MENU button, and the main menu is displayed. Then go to page 2 of the
main menu with the UP (↑) or DOWN (↓) button, then select the MAINTAIN icon
on the bottom line, and then press the OK button.
4. In this menu screen, the version number and released date of the internal software
can be checked.
5. The structure of the MAINTAIN menu is shown below.
The operation procedure is basically same as that of the ordinary user controls.
The function of each menu is explained in next section.
MAINTAIN CONFIGURATION
CHIPS
EXIT
COLOR TEMP
INITIAL EEPROM
CLEAR ETI TIME
EEPROM TEST
RGB RESET
EXIT
AGING MODE
REGISTERS VALUE
9300K
6500K
EXIT
ON
OFF
CONTROL REG
EXIT
SUB-BRIGHTNESS
R
G
B
SUB-CONTRAST
R
G
B
EXIT
000~1FF

SDM-X82(E) 2-3
2-3. Functions of Service Mode
1. COLOR TEMP
This is used for the white balance adjustment at color temperature 9300 K and 6500
K. The adjustment requires to be done for every input (INPUT1: DVI-D, INPUT1:
HD15, or INPUT2: HD15) by switching the input. The adjustment data is stored into
the register for respective inputs.
2. INITIAL EEPROM
This sets the data of the EEPROM to the default data. This operation is not required
usually.
3. CLEAR ETI TIME
This resets the ETI (Elapsed Time Indicator) counter to 00000 H.
4. EEPROM TEST
This tests writing and reading of the EEPROM.
5. RGB RESET
This adjust the offset and gain of the input AD converter for the analog inputs
(INPUT1: HD15 and INPUT2:HD15). As these adjustments are common to both
inputs, perform them for either input. It is unnecessary for another input.
Execute the adjustments under the condition where the signal specified in "White
Balance Adjustment" is input.
6. AGING IN MODE
This sets and clears the NO SYNC AGING flag.
AGING MODE = ON: Sets the NO SYNC AGING flag.
AGING MODE = OFF: Clears the NO SYNC AGING flag.
When the NO SYNC AGING flag is set and the input with no input signal is
selected, the system goes into the BURN IN mode. The NO SYNC AGING flag is
held until it is cleared. To clear the NO SYNC AGING flag, go into the service mode
and then set the AGINGN MODE to OFF, or execute the all mode recall.
7. CONTROL REG.
This can check the data of the internal registers. This operation is not required
usually.
2-4. White Balance Adjustment
< Preparation >
(1) Measurement point : Center of screen
(2) Measurement distance : 50 cm
(3) Measurement angle : 90°
(4) Color analyzer (Minolta CS-1000 or equivalent)
(5) Signal generator (Astro Design VG-828D or equivalent)
Be sure to calibrate the analog RGB output level with 75Ωtermination.
1. Service mode setting
Enter the service mode referring to step 1 and 2 of Section 2-2.
2. Aging
Set the AGING MODE in the service mode to ON. Disconnect the signal input
terminal or select the input with no signal input, and the system goes into the
AGING MODE.
Execute aging for 30 minutes or more.
3. User control setting
Feed a signal to the selected input, and then execute reset in the menu screen. Then,
move the menu display position to avoid the measurement point. Or, set the
following for respective inputs.
BACKLIGHT (Brightness of backlight) = 100
CONTRAST = 70
BRIGHTNESS = 50
Menu display position = not center of screen (Avoid the measurement point.)
(The setting of the menu display position is common to respective inputs.)
ECO = OFF (The setting of ECO is common to respective inputs.)
Do not change the above setting until the white balance adjustment is completed.

SDM-X82(E) 2-4
(6) Adjust the SUB-BRIGHTNESS: R, G, and B.
Specifications are listed below.
(7) After adjusting (4) and (6), write down the value of SUB-CONTRAST
and SUB-BRIGHTNESS.
(8) Feed the signal listed below to INPUT1: HD15, and then select
INPUT1: HD15. Select COLOR TEMP →9300K then 6500K in the service
mode menu, and enter the value written down in step (7) respectively.
5. Digital RGB white balance adjustment
(1) Feed the signal listed below to INPUT1: DVI-D.
(2) Select COLOR TEMP →9300K in the service mode menu, and set the data
listed below as initial data for adjustment.
(3) Adjust the SUB-BRIGHTNESS: R, G, and B. Specifications are listed below.
4. Analog RGB white balance adjustment
(1) Feed the signal listed below to INPUT2: HD15, and then select INPUT2: HD15.
Then execute RGB RESET in the service mode menu.
(2) Feed the signal listed below to INPUT2: HD15.
(3) Select COLOR TEMP →9300K in the service mode menu, and set the data
listed below as initial data for adjustment.
(4) Adjust SUB-BRIGHTNESS: R, G, and B. Specifications are listed below.
(5) Select COLOR TEMP →6500K in the service mode menu, and set the data
listed below as initial data for adjustment.
Pattern
Gray scale
Input level
0.73 Vp-p
Signal timing
VESA 1280 * 1024 / 60Hz
Signal timing
VESA 1280 * 1024 / 60Hz
Pattern
All gray
Pattern
30 IRE (0.21 Vp-p)
SUB-BRIGHTNESS
R
30
G
30
B
30
SUB-CONTRAST
R
141
G
141
B
141
xy
0.283 ±0.003
Brightness (cd/m 2 )
0.298 ±0.003 14 ±0.7
xy
0.313 ±0.003
Brightness (cd/m2)
0.329 ±0.003 14 ±0.7
Signal timing
VESA 1280 * 1024 / 60Hz
Pattern
All gray
Input level
30 IRE
SUB-BRIGHTNESS
R
40
G
40
B
40
SUB-CONTRAST
R
130
G
130
B
130
xy
0.283 ±0.003
Brightness (cd/m2)
0.298 ±0.003 14 ±0.7
SUB-BRIGHTNESS
R
30
G
30
B
30
SUB-CONTRAST
R
141
G
141
B
141

SDM-X82(E) 2-5
(4) Select COLOR TEMP →6500K in the service mode menu, and set the data
listed below as initial data for adjustment.
(5) Adjust the SUB-BRIGHTNESS: R, G, and B. Specifications are listed below.
6. Setting for shipping
Turn off the power with the POWER button in the front panel. Check that the red
POWER LED lights on, and then execute the all mode recall. (press the POWER
button with pressing the OK button in the power-off state)
SUB-BRIGHTNESS
R
40
G
40
B
40
SUB-CONTRAST
R
130
G
130
B
130
xy
0.313 ±0.003
Brightness (cd/m 2 )
0.329 ±0.003 14 ±0.7
2-5. Action after Replacing the LCD Panel and Board
1. After replacing the LCD panel
(1) White balance adjustment. (Refer to Section 2-4.)
(2) CLEAR ETI TIME. (Refer to Section 2-3 step 3.)
(3) Check of picture and sound.
2. After replacing the A board
(1) White balance adjustment. (Refer to Section 2-4.)
(2) EDID writing.
As the write protection is not applied in this unit, it is possible to write data
with an ordinary writing fixture.
It is required to be written for INPUT1: DVI-D, INPUT1: HD15, and
INPUT2: HD15 respectively.
Take care that the data for DVI-D and HD15 terminals are different
from each other.
(3) EDID copy to the EEPROM and ETI clear. (Refer to Section 2-1 step 6.)
Be sure to perform them after EDID writing. After executing, check
that the correct model information is displayed. (Refer to Section 2-1 step 1.)
(4) Operation check of buttons and LED's in the front panel, and Check of
picture and sound for respective inputs.
3. After replacing the I board
(1) White balance adjustment. (Refer to Section 2-4.)
(2) Check of picture and sound.
4. After replacing the G board
(1) Operation check of the MAIN POWER switch.
(2) Check of picture and sound.
5. After replacing the H board
(1) Operation check of buttons and LED's in the front panel.
6. After replacing the U board
(1) Check of speaker output.
(2) Check of headphone jack output.When connecting a plug to the headphone jack,
confirm no sound from the speakers.

SDM-X82(E) 3-1
SECTION 3
DIAGRAMS
3-1. BLOCK DIAGRAMS
CN602
CN603
CN601
CN301
IC303
IC305
IC304
IC601
IC201
IC307
IC603
IC401
IC301
IC502
IC503
IC503
IC504
IC505
IC302
CN501
BOARD
I BOARD
(INVERTER)
H BOARD
(IKEY BOARD)
G BOARD
(POWER)
A BOARD
(INTERFACE)

SDM-X82 (E) 3-2
3-2. CIRCUIT BOARDS LOCATION
G Board
A Board
I Board
H Board
U Board

SDM-X82 (E) 3-3
3-3. SCHEMATIC DIAGRAMS AND PRINTED WIRING BOARDS
•Divided circuit diagram
One sheet of A board are circuit diagram is divided into eight sheets,
each having the code A-ato A-g. For example, the destination
ab1 on the code A-asheet is connected to ab1 on the A-bsheet.
a b 1
Ref. No.
Circuit diagram division code
Note:
•All capacitors are in µF unless otherwise noted. (pF: µµF)
Capacitors without voltage indication are all 50 V.
•Indication of resistance, which does not have one for rating electrical
power, is as follows.
Pitch: 5 mm
Rating electrical power 1/4 W (CHIP : 1/10 W)
• All resistors are in ohms.
• : nonflammable resistor.
• : fusible resistor.
•∆: internal component.
• : panel designation, and adjustment for repair.
• All variable and adjustable resistors have characteristic curve B, unless
otherwise noted.
• : earth-ground.
• : earth-chassis.
• When replacing the part in below table, be sure to perform the related
adjustment.
• All voltages are in V.
• Readings are taken with a 10 M digital multimeter.
• Readings are taken with a color-bar signal input.
• Voltage variations may be noted due to normal production tolerances.
•*: Can not be measured.
• Circled numbers are waveform references.
• : B + bus.
• : B – bus.
Note: The components identified by shading and
mark !are critical for safety. Replace only
with part number specified.
Note: Les composants identifiés par un tramé et
une marque !sont critiques pour la
sécurité. Ne les remplacer que par une pièce
portant le numéro spécifié.