Sharp LC-32SB25EB Service Manual ▷ View online
LC-26SB25E/S/RU, LC-32SB25E/S/RU, LC-42SB55E/S/RU
1
SERVICE MANUAL
No. S88T2LC42SB55
LCD COLOUR TELEVISION
LC-26SB25E/S/RU
LC-32SB25E/S/RU
LC-32SB25E/S/RU
MODELS
LC-42SB55E/S/RU
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its orig-
inal condition and only parts identical to those specified should be used.
inal condition and only parts identical to those specified should be used.
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the
safety and performance of the set.
safety and performance of the set.
SAFETY PRECAUTION
IMPORTANT SERVICE SAFETY PRE-
CAUTION ............................................................2
Precautions for using lead-free solder ......….......3
CAUTION ............................................................2
Precautions for using lead-free solder ......….......3
CHAPTER 1. OPERATION MANUAL
[1] SPECIFICATIONS ..................................................4
[2] OPERATION MANUAL ...........................................5
[3] DIMENSIONS .......................................................10
CHAPTER 2. REMOVING OF MAJOR PARTS
[1] REMOVING OF MAJOR PARTS ..........................11
CHAPTER 3. ADJUSTMENT PROCEDURE
[1] ADJUSTMENT PROCEDURE .............................26
[2] SERVICE MODE ..................................................33
[3]
[1] ADJUSTMENT PROCEDURE .............................26
[2] SERVICE MODE ..................................................33
[3]
SOFTWARE UPGRADE PROCEDURE.............
..
34
CHAPTER 4. TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE..............................37
CHAPTER 5. MAJOR IC INFORMATIONS
[1] MAJOR IC INFORMATIONS.................................53
[1] MAJOR IC INFORMATIONS.................................53
CHAPTER 6. BLOCK DIAGRAM/WIRING DIAGRAM
[1] VIDEO & AUDIO BLOCK DIAGRAM ...................71
[1] VIDEO & AUDIO BLOCK DIAGRAM ...................71
CONTENTS
[2] POWER MANAGEMENT BLOCK DIAGRAM ......72
[3] I2C and RS232 BLOCK DIAGRAM .......................73
[4] WIRING DIAGRAM ...............................................74
CHAPTER 7. PRINTED WIRING BOARD
[1] MAIN UNIT PRINTED WIRING BOARD ...............77
[2] POWER UNIT PRINTED WIRING BOARD ..........79
[3] KEY UNIT PRINTED WIRING BOARD .................83
[4] IR UNIT PRINTED WIRING BOARD ....................84
CHAPTER 8. SCHEMATIC DIAGRAM
[1] MAIN SCHEMATIC DIAGRAM ............................85
[2] POWER SCHEMATIC DIAGRAM ......................102
[3] KEY SCHEMATIC DIAGRAM .............................104
[4] IR SCHEMATIC DIAGRAM .................................105
CHAPTER 9. Parts Guide
[1] SPARE PARTS LIST ..........................................106
[2] CABINET PARTS ................................................168
[3] SUPPLIED ACCESSOORIES..............................173
[4] PACKING PARTS................................................174
[3] I2C and RS232 BLOCK DIAGRAM .......................73
[4] WIRING DIAGRAM ...............................................74
CHAPTER 7. PRINTED WIRING BOARD
[1] MAIN UNIT PRINTED WIRING BOARD ...............77
[2] POWER UNIT PRINTED WIRING BOARD ..........79
[3] KEY UNIT PRINTED WIRING BOARD .................83
[4] IR UNIT PRINTED WIRING BOARD ....................84
CHAPTER 8. SCHEMATIC DIAGRAM
[1] MAIN SCHEMATIC DIAGRAM ............................85
[2] POWER SCHEMATIC DIAGRAM ......................102
[3] KEY SCHEMATIC DIAGRAM .............................104
[4] IR SCHEMATIC DIAGRAM .................................105
CHAPTER 9. Parts Guide
[1] SPARE PARTS LIST ..........................................106
[2] CABINET PARTS ................................................168
[3] SUPPLIED ACCESSOORIES..............................173
[4] PACKING PARTS................................................174
LC-26SB25E/S/RU, LC-32SB25E/S/RU, LC-42SB55E/S/RU
2
SAFETY PRECAUTION
IMPORTANT SERVICE SAFETY PRECAUTION
■
Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the
servicing guidelines which follow:
■ WARNING
1. For continued safety, no modification of any circuit should be
attempted.
2. Disconnect AC power before servicing.
CAUTION:
FOR CONTINUED PROTECTION AGAINST A
RISK OF FIRE REPLACE ONLY WITH SAME
TYPE FUSE.
42" F901 (T6.3AH/250V)
RISK OF FIRE REPLACE ONLY WITH SAME
TYPE FUSE.
42" F901 (T6.3AH/250V)
26"/32" F901 (T5AH/250V)
■
BEFORE RETURNING THE RECEIVER
(Fire & Shock Hazard)
Before returning the receiver to the user, perform the following
safety checks:
3. Inspect all lead dress to make certain that leads are not pinched,
and check that hardware is not lodged between the chassis and
other metal parts in the receiver.
4. Inspect all protective devices such as non-metallic control knobs,
insulation materials, cabinet backs, adjustment and compartment
covers or shields, isolation resistor-capacitor networks, mechanical
insulators, etc.
5. To be sure that no shock hazard exists, check for leakage current in
the following manner.
• Plug the AC cord directly into a 220~240 volt AC outlet.
• Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled
by a 0.15µF capacitor in series with all exposed metal cabinet
parts and a known earth ground, such as electrical conduit or
electrical ground connected to an earth ground.
• Use an AC voltmeter having with 5000 ohm per volt, or higher, sen-
sitivity or measure the AC voltage drop across the resistor.
• Connect the resistor connection to all exposed metal parts having a
return to the chassis (antenna, metal cabinet, screw heads, knobs
and control shafts, escutcheon, etc.) and measure the AC voltage
drop across the resistor.
All checks must be repeated with the AC cord plug connection
reversed. (If necessary, a nonpolarized adaptor plug must be used
only for the purpose of completing these checks.)
Any reading of 1.05 V peak (this corresponds to 0.7 mA peak AC.)
or more is excessive and indicates a potential shock hazard which
must be corrected before returning the monitor to the owner.
DVM
AC SCALE
1.5k ohm
10W
0.15 µF
TEST PROBE
TO EXPOSED
METAL PARTS
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
SAFETY NOTICE
Many electrical and mechanical parts in LCD color television have
special safety-related characteristics.
These characteristics are often not evident from visual inspection,
nor
can protection afforded by them be necessarily increased by using
replacement components rated for higher voltage, wattage, etc.
Replacement parts which have these special safety characteristics
are identified in this manual; electrical components having such
features are identified by “ ” and shaded areas in the Replacement
Parts List and Schematic Diagrams.
For continued protection, replacement parts must be identical to those
used in the original circuit.
The use of a substitute replacement parts which do not have the same
safety characteristics as the factory recommended replacement parts
shown in this service manual, may create shock, fire or other hazards.
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
CONNECT TO KNOWN
EARTH GROUND
LC-26SB25E/S/RU, LC-32SB25E/S/RU, LC-42SB55E/S/RU
3
Precautions for using lead-free solder
Using lead-free wire solder
• When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder may cause
damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 °C, we recommend you to use a dedicated soldering
bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or service branch in your area.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 °C, we recommend you to use a dedicated soldering
bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or service branch in your area.
Soldering
• As the melting point of lead-free solder (Sn-Ag-Cu) is about 220 °C which is higher than the conventional lead solder by 40 °C, and as it has
poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period of time. However, Since the land
may be peeled off or the maximum heat-resistance temperature of parts may be exceeded, remove the bit from the PWB as soon as you
confirm the steady soldering condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on and off the power of the bit as
required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use of it.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.
may be peeled off or the maximum heat-resistance temperature of parts may be exceeded, remove the bit from the PWB as soon as you
confirm the steady soldering condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on and off the power of the bit as
required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use of it.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.
• Be careful when replacing parts with polarity indication on the PWB silk.
LC-26SB25E/S/RU, LC-32SB25E/S/RU, LC-42SB55E/S/RU
4
CHAPTER 1.
OPERATION MANUAL
[1] SPECIFICATIONS
Specification
Item
26” LCD Colour TV,
model: LC-26SB25E,
LC-26SB25S
32” LCD Colour TV,
model: LC-32SB25E,
LC-32SB25S
42” LCD Colour TV,
model: LC-42SB55E,
LC-42SB55S
LCD panel
26” diagonal
32” diagonal
42” diagonal
Number of dots
3,147,264 dots
(1366 X 768 X 3dots)
(1366 X 768 X 3dots)
3,147,264 dots
(1366 X 768 X 3 dots)
(1366 X 768 X 3 dots)
6,220,800 dots
(1920 X 1080 X 3 dots)
(1920 X 1080 X 3 dots)
Video Colour System
PAL/SECAM/NTSC 3.58/NTSC 4.43/PAL 60
Analogue
CCIR (B/G, I, D/K, L/L’)
TV-Standard
Digital
DVB-T (2K/8K OFDM)
VHF/UHF
ATV : IRA-E69, DVB-T : E5-E69
Receiving
Channel
CATV S-band,
S1–S41ch
TV-Tuning System
Auto Preset 999 ch, Auto Label, Auto Sort
TV Function
STEREO/BILINGUAL NICAM/A2
Brightness
500 cd/m2
450 cd/m2
500 cd/m2
Backlight life
60,000 hours (at Backlight Standard position)
Viewing angles
H : 160° V : 150°
H : 176° V : 176°
Audio amplifier
5W X 2
5W X 2
10W X 2
Speaker
(100 mm X 30 mm) X 2
(100 mm X 30 mm) X 2
(140 mm X 30 mm) X 2
Antenna
UHF/VHF 75
Ω
RS-232C
D-Sub 3 pin male connector
SCART 1
SCART (AV input, Y/C input, RGB input, TV output-analogue only)
SCART 2
SCART (AV input, Y/C input, monitor output (analogue source - RF, SCART 1, SIDE AV; digital
source - DTV sound only) )
PC IN
VGA pin (AV input), Ø 3.5mm jack (Audio output)
Component
Y/Pb(Cb)/Pr(Cr), RCA pin (L/R)
Rear
SPDIF Digital
audio
output
AUDIO OUT
RCA pin (L/R)
HDMI 1
HDMI 2
C. I. (Common Interface)
EN50221, R206001
Headphones
Ø 3.5mm jack (Audio output)
AV IN
RCA pin (AV input) , RCA pin (L/R), S-VIDEO (Y/C input)
Side
HDMI 3
For 32” and 42” only
OSD language
Bulgarian, Croatian, Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian,
Italian, Norwegian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovene, Spanish,
Swedish, Turkish
Italian, Norwegian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovene, Spanish,
Swedish, Turkish
Power Requirement
AC 220–240 V, 50 Hz
Power Consumption
100W (Standby<1W)
(Method IEC60107)
150 W (Standby<1W)
(Method IEC60107)
220 W (Standby<1W)
(Method IEC60107)
Weight
7.8 kg (Without stand),
9.6 kg (With stand)
10.7 kg (Without stand),
12.5 kg (With stand)
19.5 kg (Without stand),
22.7 kg (With stand)
Operating temperature
0°C to + 40°C
•
As a part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for product improvement
without prior notice. The performance specification figures indicated are nominal values of production units. There may be some deviations
from these values in individual units.
without prior notice. The performance specification figures indicated are nominal values of production units. There may be some deviations
from these values in individual units.