Sony SDM-S51 Service Manual
MODIFICATION
# No. DATA CONTENTS
#1 2002.3 Correction of exploded views. (P.4-2)
HISTORY
MODEL NAME : SDM-S51
SERVICE MANUAL
PA RTS No. : 9-978-721-04
* Blue characters are linking.
#2 2002.9 Addition of Chinese model. (P.4-2, 4-3)
Addition of Block Diagram and Schematic diagrams/Printed Wiring Boards.
(P.3-1, 3-3~3-11)
#3 2004.9 Addition of the LCD panels. (P.1)
Addition and change of 4-1. CHASSIS PART No. (P.4-2)
SERVICE MANUAL
SDM-S51
US Model
Canadian Model
AEP Model
Chinese Model
The SDM-S51 has two
varieties of the LCD panels.
Please make sure to determine
the service parts of the LCD
module, I/F board and main
harness assy.
LCD panel Panel type: a-Si TFT Active Matrix
Picture size: 15.0 inch
Input signal format RGB operating frequency*
Horizontal: 28 - 60 kHz
Vertical: 48 - 75 Hz
Resolution Horizontal: Max.1024 dots
Vertical: Max.768 lines
Input signal levels RGB video signal
0.7 Vp-p, 75Ω, positive
SYNC signal
TTL level, 2.2 k ,
positive or negative
(Separate horizontal and vertical,
or composite sync)
0.3 Vp-p, 75Ω, negative
(Sync on green)
Power requirements 100 - 240 V, 50 - 60 Hz,
Max. 0.56 A (U/C, AEP)
Max. 0.8 A (CH)
DC input DC 12 V (supplied AC adapter)
Power consumption Max. 25 W
Operating temperature 5 - 35
°C
MODEL NAME COLOR DEST. SER. No. MODEL NAME COLOR DEST. SER. No.
SDM-S51/WQ UC Gray UC No. 4,000,001 ~
SDM-S51/WQ1 UC Gray UC No. 4,047,389 ~
SDM-S51/BQ UC Black UC No. 4,250,001 ~
SDM-S51/BQ1 UC Black UC No. 4,263,963 ~
SDM-S51/WQ EK Gray AEP No. 4,500,001 ~
SDM-S51/WQ1 EK Gray AEP No. 4,535,257 ~
SDM-S51/WQ2 EK Gray AEP No. 4,545,849 ~
SDM-S51/BQ EK Black AEP No. 4,750,001 ~
SDM-S51/BQ1 EK Black AEP No. 4,755,009 ~
SDM-S51/WQ AZ1 Gray SH No. 5,500,001 ~
SDM-S51/WQ CAN Gray CH No. 5,600,001 ~
Ω
OLD PANEL NEW PANEL
SPECIFICATIONS
Dimensions (width/height/depth)
Mass Approx. 3.7 kg ( 8 lb 3 oz) (with
Plug & Play DDC2B
Accessories See page 7.
*Recommended horizontal and vertical timing condition
Horizontal sync width duty should be more than 4.8% of total
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.
SPEC.
SDM-S51/WQ2 UC7
SDM-S51/BQ2 UC7
SDM-S51/WQ3 EKZ
SDM-S51/BQ2 EKZ
SDM-S51/WQ1 AZ1
SDM-S51/WQ1 CAN
Gray UC No. 4,150.00 ~
Black UC No. 4,300,00 ~
Gray AEP No. 4,650,00 ~
Black AEP No. 4,800,00 ~
Gray SH No. 5,510,00 ~
Gray CH No. 5,610,00 ~
Display (upright):
Approx. 387 330 175 mm
1
/4 13 7 inches)
(15
(with stand)
Approx. 387 281 48 mm
1
/
(15
(without stand)
stand)
Approx. 2.9 kg (6 lb 5 oz)
(without stand)
×
×
×
×
1
11
4
/8 1 15/16 inches)
×
×
×
×
TFT LCD Color Computer DISPLAY
1.5 k
Ω
0.15 µF
AC
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
SAFETY CHECK-OUT
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 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 right.
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 WT540A. 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)
Fig. A. Using an AC voltmeter to check AC leakage.
SDM-S51(E) 2
WARNING!!
NEVER TURN ON THE POWER IN A CONDITION IN WHICH THE
DEGAUSS COIL HAS BEEN REMOVED.
AVERTISSEMENT!!
NE JAMAIS METTRE SOUS TENSION QUAND LA BOBINE DE
DEMAGNETISATION EST ENLEVÉE.
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.
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.
SDM-S51(E) 3
POWER SAVING FUNCTION
This monitor meets the power-saving guidelines set by VESA,
E
NERGY STAR, 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.
SDM-S51
Power mo de Power c onsumption
normal
operation
active off*
(deep sleep)**
power off 3 W (max.) off
* When your computer enters the active off mode, the input signal is
cut and NO INPUT SIGNAL appears on the screen. After 20 seconds,
the monitor enters th e power saving mode.
** deep sleep
Protection Agency.
25 W (max.) green
3 W (max.) orange
is the power saving mode defined by the Environmental
1
(power)
indicator
SDM-S51(E) 4
AUTOMATIC PICTURE QUALITY ADJUSTMENT FUNCTION
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. (See Appendix for a list of the factory preset
modes.)
For input signals that do not match one of the factory preset
modes, the automatic picture quality adjustment function of this
monitor automatically adjusts the picture position, phase, and
pitch, and ensures that a clear picture appears on the screen for
any timing wit hin the monitor,s frequency range (horizontal: 28 -
60 kHz , vertical: 48 - 75 Hz ).
Consequently, the first time the monitor receives input signals
that do not match one of the factory pr eset 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 tha t match one of
the factory preset modes.
In all modes as above, if t he picture is adjusted, t he adjustment
data is stored as a user mode and automatically recalled whenever
the same input signal is received.
Note
While the automatic picture quality adjustment function is activated, only
the (power) swi tc h w ill operate.
SDM-S51(E) 5
TABLE OF CONTENTS
Section Title Page Section Title Page
1. DISASSEMBLY
1-1. Back Cabinet and TFT Panel Removal ................ 1-1
1-2. Keyboard Mount Removal ................................... 1-2
1-3. Inverter Mount Removal ...................................... 1-3
1-4. I/F Board Removal ............................................... 1-4
1-5. TFT Panel Removal .............................................. 1-5
2. ADJUSTMENTS
2-1. Functional Alignment (1) ..................................... 2-1
2-2. Functional Alignment (2) ..................................... 2-2
2-3. Table 1&2 ............................................................ 2-3
2-4. Timing Specification ............................................ 2-4
2-5. W/B Alignment Procedure.................................... 2-5
4. EXPLODED VIEWS
4-1. Chassis ................................................................. 4-2
4-2. Packing Materials ................................................. 4-3
5. ELECTRICAL PARTS LIST ............................... 5-1
3. DIAGRAMS
3-1. Circuit Boards Location ........................................ 3-1
SDM-S51(E) 6
SECTION 1
DISASSEMBLY
1-1. BACK CABINET AND TFT PANEL REMOVAL
1 Four screws
(+PVTP 4x12)
2 Back cabinet
3 TFT panel
SDM-S51(E) 1-1
1-2. KEYBOARD MOUNT REMOVAL
1 Screw
(+PWH 3x4)
2 Four screws
(+PVTP 3x10)
3 Keyboard mount
SDM-S51(E) 1-2
1-3. INVERTER MOUNT REMOVAL
3 Two screws
(+PWH 3x4)
5 Inverter mount
6 CN2
1 Two screws
(+PWH 3x4)
2 Inverter cover
4 Inverter shield
6 CN1
6 CY2
SDM-S51(E) 1-3
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