Sharp LC-15B2H, LC-15B2M Service Manual
LC-15B2H
LC-15B2M
SERVICE MANUAL
SX1LC-15B2H//
LCD COLOR TELEVISION
LC-15B2H
MODELS
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored
to its original condition and only parts identical to those specified should be used.
LC-15B2M
CONTENTS
Page Page
» IMPORTANT SERVICE SAFETY
PRECAUTION.................................................... 2
» SPECIFICATIONS ............................................. 3
» OPERA TION MANUAL ...................................... 4
» DIMENSIONS .................................................... 5
» REMOVING OF MAJOR PARTS ....................... 6
» ADJUSTING PROCEDURE OF
EACH SECTION ................................................ 9
» TROUBLE SHOOTING TABLE ....................... 13
» CHASSIS LAYOUT.......................................... 16
» BLOCK DIAGRAM ........................................... 18
» DESCRIPTION OF SCHEMATIC DIAGRAM .. 20
» SCHEMATIC DIAGRAM
Ë
OPERATION and R/C RECEIVER UNIT .. 21
Ë
MAIN UNIT ................................................ 22
Ë
TERMINAL UNIT ....................................... 30
Ë
JACK UNIT ................................................ 34
» PRINTED WIRING BOARD ASSEMBLIES..... 35
» PARTS LIST
Ë
ELECTRICAL PARTS ................................ 39
Ë
MAIN UNIT ................................................ 39
Ë
TERMINAL UNIT ....................................... 41
Ë
OPERATION UNIT .................................... 44
Ë
JACK UNIT ................................................ 44
Ë
R/C RECEIVER UNIT................................ 45
Ë
CABINET PARTS LOCATION ................... 45
Ë
ACCESSORIES PARTS ............................ 48
Ë
PACKING PARTS ...................................... 48
» PACKING OF THE SET................................... 49
SHARP CORPORATION
1
LC-15B2H
2
2
LC-15B2M
IMPORTANT SERVICE SAFETY PRECAUTION
Ë
Service work should be perfomed only b y qualified service technicians who are thoroughl y
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. F3701 (T1.6A, 250V), F3703
(T2A, 250V) FUSE.
BEFORE RETURNING THE RECEIVER
(Fire & Shock Hazard)
Before returning the receiver to the user, perform
the following safety checks:
1.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.
2.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.
3.To be sure that no shock hazard exists, check for
leakage current in the following manner.
•Plug the AC cord directly into a 110~240 volt AC outlet,
and connect the DC power cable into the receiver's
DC jack. (Do not use an isolation transformer for this
test).
•Using two clip leads, connect a 50k 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, sensitivity or measure the AC voltage drop
across the resisor.
•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 0.75V peak (this corresponds to 0.5
milliamp. 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
50k ohm
10W
0.15 µF
TEST PROBE
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121
SAFETY NOTICE
Many electrical and mechanical parts in LCD 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
and shaded areas in the
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.
components having such features are identified by “ å”
234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121
Replacement Parts Lists
.
2
and
Specifications
LC-15B2H
LC-15B2M
Items
LCD panel
Number of dots
Video colour system
TV Standard (CCIR)
TV Turning System
TV function STEREO/BILINGUAL
Universal R/C for TV only
AUTO PRESET
CATV
4-Line digital comb filter
Brightness
Lamp life
Viewing angles
Audio amplifier
Speakers
AV1
Terminals AV2 IN/OUT
Component
Headphones
OSD language
Power requirement
Weight
Accessories
Model
LC-15B2H/M
15” TFT LCD
921,600 dots VGA
World multi system
I/DK/M/BG
Auto preset turning
NICAM-BG, I, DK/IGR-BG
Yes
Yes
~ Hyper Band
Yes
430 cd/m
60,000 hours
H: 160° V: 160°
2.1 W × 2
4 × 7 cm Oval, 2 pcs.
Composite Video, S-Video, Audio
Composite Video/Audio
Y, PB, PR/Audio
3.5 mm ø jack (Rear)
English/Chinese/Arabic
DC 12 V, AC 110–240 V, 50/60 Hz
4.6 kg w/o accessories
Remote control, Btteries, AC adapter, AC cord,
Cable clamps, Operation Manual, Antenna cable
2
Specifications are subject to change without prior notice.
3
LC-15B2H
LC-15B2M
Operation Manual
Main unit (front view)
Upper control panel
VOL (+)/(–)
)/( )
CH (
MENU
TV/VIDEO
MAIN POWER
VOL CH MENU TV/VIDEO MAIN POWER
PRESET
12
Auto Preset Details are
described.
Speaker
Remote sensor window
(The actual location is not visible.)
Note:
■
TV/VIDEO, CH ( )/( ), and VOL (+)/(–) on the main unit have the same functions as the same buttons on the
remote control. Fundamentally, this operation manual provides a description based on operation with the remote
control.
Speaker
To change the vertical
angle of the LCD TV set,
tilt the screen up to 10
degrees forward or 20
degrees backward. The
TV set can also be
rotated 90 degrees
horizontally. Please adjust
the angle so that the TV
set can be watched most
comfortably.
SLEEP indicator
The SLEEP indicator lights up red when
the SLEEP TIMER is set to on.
POWER/STANDBY indicator
A green indicator lights when the power is
on and a red indicator lights when in the
standby mode (the indicator will not light
when the main power is off).
Remote control
Main unit (rear view)
NT.
A
T
U
-IN 2/O
V
A
O
E
ID
V
L
IO
D
AU
R
T
NEN
PO
M
O
C
Y
B
P
R
P
L
IO
D
AU
R
D
A
HE
NE
PHO
ER
POW
T
PU
IN
C12V
D
DISPLAY
Press....Displays receiving channel for 10 seconds.
Channel indication reduces in size after
about 10 seconds.
Press again...Removes display.
Antenna terminal
VIDEO
AUDIO (L)
AUDIO (R)
Y
P
B
P
R
AUDIO (L)
AUDIO (R)
HEADPHONE
POWER INPUT
(DC 12V)
A
V-IN
1
V
ID
E
O
L
A
U
D
IO
R
S
-V
ID
EO
AV-IN 2/OUT
COMPONENT
VIDEO
AUDIO (L)
AUDIO (R)
S-VIDEO
AV-IN 1
POWER
(Upward/Downward Selection)
Returns sound to previous level.
MENU cursor
Press....Stops sound.
MUTE
Press again...
VOL (+)/(–)
CHANNEL SELECT
4
POWER
DISPLAY
BRIGHTSLEEP
MENU
TV/VIDEO
VOL
CH
MPX
-/--
MENUSLEEP
BRIGHT
The brightness can be
switched between 3 levels.
TV/VIDEO
MENU cursor
(Right/Left Selection)
FLASHBACK
Returns to previous channel
CH ( )/( )
Selects next higher channel
Selects next lower channel
MPX
Switching Audio mode.
Dimensions
58.1
53.5
VOL
307
305.28
LC-15B2H
LC-15B2M
MAIN POWER
CH
MENU TV/VIDEO
PRESET
69
301.6
484
58.1
95.8
229.4
0.5107.3
365.2
371
1
29675
231
228.96
SLEEPPOWER
AV-IN 2/OUT
VIDEO
AUDIO
COMPONENT
AUDIO
HEAD
PHONE
POWER
INPUT
DC12V
100
43
24.5
L
Y
B
P
P
R
L
R
14 13 14 14 14 14 14 14 14
43.9
S-VIDEO
100
AV-IN 1
VIDEO
AUDIO
L
R
2.5
16 15 15
18 9
149.5
198
48.5
135.8
(Unit: mm)
5
LC-13B2E
REMOVING OF MAJOR PARTS
1. Remove the back cover.
2. Remove the table stand fixing screws (4 pcs.).
3. Remove the cabinet B fixing screws (9 pcs.) and detach the cabinet.
4. Peel off the tape.
5. Detach the connector from each PWB.
Back cover
2
3
3
Cabinet B
3
1
3
3
Table stand
5
5
P4004
P3604
LED PWB
P3600
P4001
Terminal PWB
SC903
P902
P904
P701
P702
5
SC902
4
Tape
P2005
SC901
P903
P901
Operation PWB
SC802
SC801
P305
5
6
SC5702
P2004
Main PWB
P2006
5
5
Jack PWB
P5001
P304
5
SC1202
SC1201
P5701
5
5
6. Remove the fixing angle fixing screws (2 pcs.).
7. Remove the terminal PWB fixing screws (3 pcs.).
8. Remove the jack PWB fixing screw (2 pc.).
9. Remove the main PWB fixing screws (1 pcs.).
10. Remove the LED PWB fixing screws (2 pcs.).
11. Remove the operation PWB fixing screws (2pcs.).
12. Remove the chassis frame fixing screws (4 pcs.)
7
LC-13B2E
8
Terminal PWB
6
Jack PWB
9
Main PWB
12
Chassis Frame
Operation PWB
11
LED PWB
10
7
LC-13B2E
» Precautions in handling the LCD panels
1. Work in a clean room (with humidities below 50%).
2. Be sure to wear an anti-static ar mband.
3. Handle the panels on an electroconductive mat.
4. Be careful not to fall, shake and shock the panels.
13. Remove the LCD display unit fixing screws (4 pcs.).
14. Detach the two diffusion sheets and reflection/deflection sheet.
15. Detach the four reflection mirrors.
16. Remove the fluorescent lamp.
17. Detach the lamp guide plate.
18. Detach the two lamp reflection sheets.
15
Reflection Mirror
13
LCD Display Unit
Fluorescent Lamp
(KLMP-0109CEZZ)
16
13
Light Guide Plate
(PGiDM0064CEZZ)
17
14
Diffusion Sheet
(PSHEP0244CEZZ)
Reflection/deflection Sheet
(PSHEP0245CEZZ)
15
Lamp Reflection Sheet-1
18
(PSHEP0246CEZZ)
Lamp Reflection Sheet-2
(PSHEP0247CEZZ)
Sheilding Plate
(PSLDM4660CEFW)
Reflection Mirror
8
LC-15B2H
LC-15B2M
ADJUSTING PROCEDURE OF EACH SECTION
Preparation for Adjustments
Use the dedicated AC adaptor or stable DC power supply.
LC13B2 AC adaptor: UADP-0226CEPZ
DC power supply: 12 ± 0.5V, 3.0 (A)
[1] Adjusting procedure
1-1. Checker adjustment
Power ON (initialization) → Setting of model and inch size → Model data transfer to the setting E2PROM (I2C)
→ Adjustment processing mode → Adjustment (+B adjustment)
1-2. Finish processing adjustment
Setup → Power ON → Adjustment processing mode (Remote control) → Counter bias, TV contrast and white
balance adjustments
[2] Entering the adjustment processing mode
There are the following two methods.
• Setting the pin (81) (KEY4) or pin (82) (KEY5) of IC2001 (microprocessor) to "L", turn on the power.
• When service is given: POWER button is made on with pushing TV/VIDEO and MENU buttons at the same
time.(K of the inspection process mode is displayed by the upper left of the image plane.) → Next, CH (Ù) and
VOL (–) buttons are pushed at the same time.(It becomes the image plane of the adjustment process
mode.).....When it is canceled, it is made to turn it off.(Even off in the POWER button, off with R/C are good.)
[3] Key operation in the adjustment processing
Selection of the receiving channel
• The receiving channel UP/DOWN is performed with the CH (ù)/(Ù) buttons.
One push ... The UP/DOWN tuning is performed per channel.
Continuous push ... The UP/DOWN search is performed until a next receivable station is found.
• Various adjustments
The adjustment is performed for each item by the MENU, CH(ù)/(Ù) or VOL (+)/(–) buttons (main body and
remote control).
• Adjustment item is chosen with the MENU cursor UP/DOWN buttons.
• The adjustment item makes a toggle operation with the MENU button input. (Next item)
If the MENU button is input while the bottom item is selected, it moves to the top item on the next page.
[4] Initialization
4-1. Connect the pins (81) and (82) of IC2001 (microprocessor) to GND, and turn on the power.
4-2. Select the model name (B2H).
4-3. Select the inch size (15).
9
LC-15B2H
LC-15B2M
[5] Adjustment
5-1. +B adjustment...R3760 and a half fixations VOL
1) Receive the colour bar signal.
2) Adjust the voltage of the pin (38) of SC3403 to 5.00±0.02V.
Note: Since 5.0V is a reference voltage of all power voltage, adjust it precisely.
5-2. Counter-bias adjustment...Page 2 COM BIAS
V ary the "COM BIAS" setting on Page 2 of the adjustment process so that the contrast be sharpest (black looks
most sinking). The adjustment guideline is around 39.
5-3. TAMP adjustment
1) Receive the colour bar signal.
2) When reading value of adjustment process the page 2 "Y" is not within value of the bottom table, the adjustment
of "NTSC TAMP" of the same page is done, and reading value of "Y" is made to be within value of "B8" to
"C2".
3) If the adjustment of "NTSC TAMP" is executed, write its adjustment value to the followings manually.
"PAL TAMP"
"SECAM TAMP"
"PAL-M TAMP"
"PAL-N TAMP"
(Screen of the page 2 of the adjustment processing menu OSD)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
0
1
2
3
4
5
6
7
8
9
10
11
12
13
2
COM B I AS 3 9
NTSC TAMP 24
PAL TAMP 24
SECAM TAMP 24
PAL - M TAMP 24
PAL - N TAMP 24
RCUTOF F
GCU TOF F
BCU TOF
G3 B3 R3 00 00 00
G1 B4 Y 0 0 00 BE
TAMP H
TAMP L
F
Y Data
(White 75%)
–
5
0
– 1
C2
B8
5-4. White balance adjustment
1) Receive the monoscope pattern signal.
2) Adjust "RCUT OFF" and "BCUT OFF" on the page 2 of the adjustment processing so as to obtain the colour of
the same level as the standard set.
Caution: For the adjustment processing of "RCUTOFF" and "BCUTOFF", adjust them in the indication value
range of ... –9, –7, ... –1, +1, ... +7, +9.
When it becomes even-numbered value, side favor noise sometimes occurs in the monochrome signal of the
specific gradation.
10
[6] Lamp error detection
6-1. Functional description
This LCD colour television has a function (lamp error detection) to be turned OFF automatically for safety
when the lamp or lamp circuit is abnormal.
If the lamp or lamp circuit is abnormal, or some other errors happen, and the lamp error detection is executed,
the followings occur.
1 The main unit of television is turned OFF 5 seconds after it is turned ON. (The power LED on the front side
of TV turns from green to red.)
2 If the situation 1 happens 5 times sequentially, television can not be turned ON. (The power LED remains
red.)
6-2. Countermeasures
6-2-1. Check when turning OFF the lamp error detection
When television is turned OFF by the lamp error detection mentioned above, it enters the adjustment
process with the power LED red. Entering the adjustment process turns OFF the error detection and turns
ON TV.
This enables the operation check to detect errors in the lamp or lamp circuit.
Check whether "ERROR NO RESET" on line 9, page 1 of the adjustment process is 1 or more. If it is 1 or
more, it indicates the lamp error detection was executed.
6-2-2. Resetting of the lamp error count
After confirming that the lamp or lamp circuit is normal, reset the lamp error count. Select "ERROR NO
RESET" on line 9, page 1 of the adjustment process and set the number to 0 using the volume button.
LC-15B2H
LC-15B2M
Page 1 of the adjustment process
1
+ B – A D J 160
M O D E L B2H
I N C H S I Z E 15
N T S C P W M F R E Q 0C0
P A L P W M F R E Q 0BD
N T S C P W M D U T Y 0
P A L P W M DU T Y 0
T V G A I N OFF
E R R O R N O R E S E T 5
P U B L I C M O D E ON
B 2 H V E R 1 . 0 0
Reset 0
Afterwards, perform the operation check to confirm that the lamp error detection does not function.
11
LC-15B2H
LC-15B2M
[7] PUBLIC MODE
• How to enter into PUBLIC MODE
1.Turn off TV by pressing MAIN POWER switch.
2.While pressing VOL(+) key and CH(ù) buttons at the same time, press MAIN POWER switch.
For more than 2 seconds.
TV will turn on, and you will see the screen display a setting of PUBLIC MODE.
• Setting screen of "PUBLIC MODE"
PUBLIC MODE
MAXIMUM VOLUME [ 60]
VOLUME FIXED [VARIABLE]
REMOTE CONTROL [RESPOND]
USER CONTROL [RESPOND]
ON SCREEN DISPLAY [YES ]
AV1 INPUT [NORMAL ]
RESET
ENTER
1 ↔ 2 ··· ↔ 59 ↔ 60
VARIABLE ↔ FIXED
RESPOND ↔ LIMITED
RESPOND ↔ NO RESPOND
YES ↔ NO
NORMAL ↔ START ↔ AV1 FIXED
Factory setting
Adjust setting
1. You can select each item of functions by pressing MENU cursor UP/DOWN buttons on the remote control or
CH(ù)/(Ù) buttons on the LCD TV. The letter of selected item turns to yellow colour when you selected it.
2.The setting position of each item of functions are made by pressing MENU cursor RIGHT/LEFT buttons on
the remote control or VOL(+)/(–) buttons on the LCD TV.
3.Select ENTER position after you set all functions, and press MENU cursor RIGHT/LEFT buttons on the
remote control or VOL(+)/(–) buttons on the LCD TV for confirmation.
Unless otherwise you make ENTER confirmation, the settings will not be memorized.
6-functions of Public Mode settings expand for public application.
1. MAXIMUM VOLUME(1--------60)
You can set the maximum volume at your desire level.
2. VOLUME FIXED (VARIABLE/FIXED)
You can fix the sound volume at your desire level.
When you set to "FIXED", the sound volume which you just set is fixed.
3. REMOTE CONTROL (RESPOND/LIMITED)
If you set "LIMITED", remote control button of POWER, CH(ù)/(Ù), VOL(–)/(+) and BRIGHT are responded,
but other buttons are not responded.
This is a position that you can not make MENU adjustments.
4. USER CONTROL (RESPOND/NO RESPOND)
"NO RESPOND" means that the TV does not respond when you press a user control buttons except POWER
button on the main unit.
5. ON SCREEN DISPLAY (YES/NO)
If you set "NO" position, OSD will not appear.
6. AV1 INPUT (NORMAL/START/AV1 FIXED)
Some application use DVD or VCR connecting to AV1 input of our monitor and you will not want to change it to
other mode, such as Component or AV2 input.
You can set the position of input "AV1 FIXED".
For other application that you want to start AV1 every time when you press POWER button, and you may select
other input mode after then, set it at "START" position.
7. RESET
You can cancel all Public Mode settings. (It returns to the factory setting.)
8. ENTER
You make sure after you have specified all functions, then press the enter key. Unless otherwise you press the
enter key, all positions that you have selected will not be set.
12
No picture
at all
Yes
No
Are inputs
and outputs
of IC801 as
specified?
Check all the settings on the microprocessor’s adjust process menu.
No picture
Check IC801
and its
peripheral
parts.
Yes
No
Are inputs
and outputs
of IC1201 as
specified?
Check
IC1201 and
its peripheral
parts.
Check LCD
panel voltage
and
waveform.
No TV and
VIDEO 1
output
Yes
No
Are inputs
and outputs
of IC402 as
specified?
Check IC402
and its
peripheral
parts.
No
Is input at pin
(73) of IC801
as specified?
Check IC801,
AV1 line and
their
peripheral
parts.
No TV
output
Yes
No
Are voltages
at pins (6), (7)
and (9) of
tuner as
specified?
Check the
power line.
Yes
No
Is output at
pin (19) of
tuner as
specified?
Check the
tuner and its
peripheral
parts.
No
Is input at pin
(3) of IC402
as specified?
Check the
line in
question.
Yes
Check IC402
and its
peripheral
parts.
Yes
No
Are pins (2)
and (4) of
IC402 at “H”
and “L”
respectively?
Are pins (65)
and (66) of
IC2001 at “H”
and “L”
respectively?
No VIDEO
1 or 2
output
Yes
No
Is input at
pins (1) or (5)
of IC402 as
specified?
Check the
line in
question.
Yes
No
Are pins (2)
and (4) of
IC402 both at
“L” or pins (4)
of IC402 at
“H”?
No S
VIDEO
output
No
Are inputs at
pins (71) and
(72) of IC801
as specified?
Check
SC5001, SY
line, SC line
and
peripheral
parts.
No
COMPONENT
output
No
Is input at
pins (4), (5),
(6) and (75)
of IC801 as
specified?
Check J3404,
J3405, J3406,
DVD-Y line,
PB line, PR
line and
peripheral
parts.
Are pins (65)
and (66) of
IC2001 both
at “L” or pins
(66) of IC1201
at “H”?
Check IC402
and its
peripheral
parts.
Yes
Check the
line in
question.
Yes
Check the
line in
question.
TROUBLE SHOOTING TABLE
LC-15B2H
LC-15B2M
13
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