LC-121M2E (serv.man3). Service Information - Sharp TV Service Manual (repair manual)

Model
LC-121M2E (serv.man3)
Pages
27
Size
441.68 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Service Information
File
lc-121m2e-sm3.pdf
Date

View Sharp LC-121M2E (serv.man3) Service Manual online

1
LC-121M2E
LC-150M2E
LC-121M2E
LC-150M2E
S19B4LC121M2E
SERVICE MANUAL
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 be used.
LC-121M2E
LC-150M2E
LC-121M2E
LC-150M2E
SHARP CORPORATION
 CONTENTS
Page
1. IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................... 2
2. SPECIFICATIONS ................................................................................................................................... 3
3. PART NAMES .......................................................................................................................................... 4
4. DISASSEMBLY OF THE SET .................................................................................................................. 5
5. ADJUSTING PROCEDURE OF EACH SECTION ................................................................................... 7
6. INTEGRATED CIRCUIT TERMINAL ARRANGEMENTS ........................................................................ 18
7. TROUBLE SHOOTING ............................................................................................................................ 23
8. CHASSIS LAYOUT .................................................................................................................................. 26
9. SCHEMATIC DIAGRAM .......................................................................................................................... 28
10. BLOCK DIAGRAM ................................................................................................................................... 43
11. PRINTED WIRING BOARD ASSEMBLIES .............................................................................................. 45
12. REPLACEMENT PARTS LIST ................................................................................................................. 51
13. PACKING OF THE SET ........................................................................................................................... 63
MODELS
LCD AV MONITOR
The component parts of this model are partially different
depending on their suffix symbols. Before servicing the
units, be sure to check the suffix symbol on the model
label that is applied on the bottom side of the unit.
Suffix symbol (   , K , X )
MODELS LC-121M2E/150M2E
SERVICE MANUAL
LCD AV MONITOR
2
LC-121M2E
LC-150M2E
LC-121M2E
LC-150M2E
1. IMPORTANT SERVICE SAFETY PRECAUTION
æ 
Service work should be perfomed only by qualified service technicians who are
     thoroughly familiar with all safety checks and 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. F701 (1.25A,
250V), F702 (2A, 250V), F703 (1.25A, 250V)
FUSE.
BEFORE RETURNING THE MONITOR
(Fire & Shock Hazard)
Before returning the monitor 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 monitor.
2. Inspect all protective devices such as non-me-
tallic 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
current in the following manner.
• Plug the AC Adaptor directly into a 100~240 volt
AC outlet, and connect the DC power cable into
the monitor's DC jack. (Do not use an isolation
transformer for this test).
• Using two clip leads, connect a 1.5k ohm, 10
watt resistor paralleled by a 0.15
µ
F 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 path to the chassis
(antenna, metal cabinet, screw heads, knobs
and control shafts, escutcheon, etc.) and meas-
ure the AC voltage drop across the resistor.
All checks must be repeated with the  AC Adap-
tor plug connection reversed.(If necessary, a
nonpolarized adaptor plug must be used only for
the purpose of completing these checks.)
     
A       V
Any reading of 0.3V RMS(this corresponds
to 0.2 milliamp. AC.) or more is excessive and
indicates a potential shock hazard which must
be corrected before returning the monitor to
the owner.
SAFETY NOTICE
Many electrical and mechanical parts in LCD monitor
have special safety-related characteristics.
These characteristics are often not evident from visual
inspection, nor can protection afforded by them be nec-
essarily 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
“ 
å
” and shaded areas in the 
Replacement Parts Lists
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.
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
DVM
AC SCALE
1.5k ohms.
10W
0.15 
µ
F
TEST PROBE
3
LC-121M2E
LC-150M2E
LC-121M2E
LC-150M2E
2. SPECIFICATIONS
Type: LCD display unit (LCD color AV monitor)
Size: 12.1" type (184.3 mm 
×
 245.8 mm) (LC-121M2E)
15" type    (219.9 mm 
×
 305.3 mm) (LC-150M2E)
Display System: Transmitting type TN liquid crystal panel.
Driving System: TFT (Thin Film Transistor) active matrix system
Number of Picture Elements: 921,600 (480 (V) 
×
 640 (H) 
×
 3 (RBG) )
Speaker Output: 0.7 W 
×
 2 (Front)
2 W 
×
 1 (Rear)
Speaker: 30 mm 
×
 40 mm (Elliptic) 
×
 2 (Front)
65 mm (Round) 
×
 1 (Rear)
Light Source: Internal Light (Built-in fluorescent lamp)
Connected Terminals: Input:
DC12V, VHS, S-VHS, Audio and DVD
Output: VHS, S-VHS, Audio and Headphone
Power Source: AC 100~240·50/60Hz (Connected to AC Adapter)
Power Consumption (Approx.): 12.1" type 33 W (Connected to AC Adapter) (LC-121M2E)
15" type    35 W (Connected to AC Adapter) (LC-150M2E)
Operating Temparature: –10
°
C~40
°
C
12.1" type Dimensions(LC-121M2E): 297.4 mm (W) 
×
 264.6 mm (H) 
×
 87 mm (D) (Includes Set Stand)
297.4 mm (W) 
×
 264.6 mm (H) 
×
 62.5 mm (D) (Not Include Set Stand)
15" type Dimensions(LC-150M2E): 357.7 mm (W) 
×
 309.2 mm (H) 
×
 87 mm (D) (Includes Set Stand)
357.7 mm (W) 
×
 309.2 mm (H) 
×
 62.5 mm (D) (Not Include Set Stand)
Weight (Approx.): 12.1" type 2.9 kg (LC-121M2E)
15" type    3.6 kg (LC-150M2E)
Accessories: Operation Manual, Guarantee Card, AC Adapter, Remote Control,
Set Stand Mounting Screws, Wall mounting set angle and Batteries (AAA size
x 2)
Specifications are subject to changed without prior notice.
4
LC-121M2E
LC-150M2E
LC-121M2E
LC-150M2E
3. PART NAMES
5
LC-121M2E
LC-150M2E
LC-121M2E
LC-150M2E
1
Push
Cabinet B
Cabinet A
b  WH
Cabinet A 
12 type CCABA2338CE01 GCABA2338CEKA
15 type CCABA2343CE01 GCABA2343CEKA
Cabinet B
12 type
CCABB2246CE01 GCABB2246CEKA (LC-121M2E/K)
CCABB2246CE03 GCABB2246CEKA (LC-121M2X)
15 type
CCABB2249CE01 GCABB2249CEKA (LC-150M2E/K)
CCABB2249CE03 GCABB2249CEKA (LC-150M2X)
Cable
a
a
a
a
a
a
a
1
4
8
5
r
7
9
e
0 q
w
7
t
u
y
u
i
2
6
3
Cabinet B
c  WH
4. DISASSEMBLY OF THE SET
1. Remove four screws (
1
).
2. Opening six claws ( a ), release the cabinet B.
Remove the wire holder ( b ) and disconnect each
connectors (
2
~
6
).
Remove the cabinet B.
3. Remove two screws (
7
) which mounting the LCD
display unit.
4. Remove soldering of copper-foil tape (
8
) .
5. Disconnect each connectors (
9
~
e
) from the LCD
display unit.
6. Remove the cabinet A.
7. Remove four screws (
r
) which mounting the main
PWB unit.
8. Remove one screw (
t
) and remove the remote control
receptor PWB.
9. Remove five screws (
y
) and GND cable.
10.Remove ten screws (
u
) and remove the terminal cover.
11.Remove two screws (
i
) and remove the switch PWB.
6
LC-121M2E
LC-150M2E
LC-121M2E
LC-150M2E
12. Remove one screw (
o
) and remove the Sosu shield
angle.
13. Remove four screws (
p
) which mounting the LCD
display unit.
14. Spread bites of the LCD unit (
a
) out to be off from
claws.
15. Remove the Lamp unit (
s
).
o
Holder 
LHLDZ2082CEKZ (LC-121M2E)
LHLDZ2085CEKZ (LC-150M2E)
p
p
a
s
7
LC-121M2E
LC-150M2E
LC-121M2E
LC-150M2E
The best adjustment is made before shipping. If any position deviation is found or after part replace is performed, adjust
as follows.
5-1. Preparation for adjustment
(1)Use the exclusive-use AC adapter or stable DC power supply.
AC adapter: UADP-0181CEZZ
DC power supply: 12 
±
 0.5V
5-2. Special mode setting procedure
(1)After initialization of E
2
PROM the mode is changed to the adjustment mode.
[Procedure]
Connect TP2007 and TP2008 to GND, and turn on the power.
[Description]
• The initialization of microcomputer is as follows.
• AV position, DAC data, G/A data, and video chroma data adjustment values are taken as defaults.
(2)Change to adjustment mode
[Procedure]
Short-circuit TP2007 to GND, and turn on the power.
Or short-circuit TP2008 to GND, and turn on the power.
Or holding down the [AV INPUT] key and [MENU] key, turn on the main power, and simultaneously press the (inspection
process) [SELECT 
"
] key and [VOL– ] key to change the mode to the adjustment mode.
[Description]
The manual adjustment or adjustment through communication with the automatic machine is performed.
(3)Inspection mode
[Procedure]
Holding down the [AV INPUT] key and [MENU] key, turn on the power.
[Description]
• In the ordinary menu select “PICTURE” with the [SELECT] key, and decide with the [VOL] key. Then select
“CONTRAST”, “TINT (only NTSC)”, “COLOR”, “BLACK LEVEL”, “SHARPNESS”, “RED” , and “BLUE” with the
[SELECT] key, and decide with the [VOL] key. After that, adjust values with the [VOL] key.
• In the ordinary menu select “SOUND” with the [SELECT] key, and decide with the [VOL] key. Then, select “TREBLE”,
“BASS”, and “BALANCE” with the [SELECT] key, and decide with the [VOL] key. After that adjust values with the [VOL]
key.
• VOLUME, CONTRAST, TINT (only NTSC), COLOR, BLACK LEVEL, SHARPNESS, RED, BLUE, TREBLE, BASS,
and BALANCE change as follows.
(4)Shipping setting mode
[Procedure]
Holding down the [AV INPUT] key and [MENU] key, turn on the main power, and simultaneously press the (inspection
process) [SELECT 
'
] key and [VOL+] key to change the mode to the adjustment mode.
[Description]
User adjustment and other values are taken as defaults.
If AV1 is indicated as SETTING COMPLETE, setting has been completed.
û
Min.
Û
    
û
Center
Û
    
û
Max.
Û
5. ADJUSTING PROCEDURE OF EACH SECTION
8
LC-121M2E
LC-150M2E
LC-121M2E
LC-150M2E
5-3. Cancel of special mode
Turn off the main unit power.
5-4. Preparation adjustment
(1)Use the exclusive-use AC adapter or stable DC power supply.
AC adapter: UADP-0181CEN1
DC power supply: 12 
±
 0.5V
5-5. OSD menu indication and items in case of manual adjustment
Adjusting range
Page
Item
Minimum Maximum
Initial
Remarks
1
+ B – ADJ
0
255
128
MODEL
M2H
F2/M2H/M2U/M2E
TUNER
OFF
1/2/OFF
AUDIO MULTIPLEX
OFF
OFF/ON
BOOSTER
0
0/1/2/3
SYSTEM
AUTO
N358/N443/PAL/PAL-M/SECAM/AUTO
COPY GUARD
ON
OFF/ON
CH MEMORY
OFF
OFF/12/16
SECAM
ON
OFF/ON
MULTI LANG.
OFF
OFF/ON
TIMER
OFF
OFF/ON
  The Ver. No. will be displayed on the lowest part of lines.
2
TA1276 DATA
~~~~
COM
0
255
128
NTSC/PALM OSC
0
255
128
N358 BRIGHTNESS
0
255
170
R CUTOFF
0
255
80
B CUTOFF
0
255
80
N358UNICOLOR
0
127
80
R DRIVE
0
127
64
B DRIVE
0
127
64
N358SCOLOR
0
31
25
N358TINT
0
127
74
DATA COPY
WAIT
WAIT/SEND
3
N358 R-Y PHASE
0
3
2
N358 B-Y PHASE
0
3
1
N443 BRIGHTNESS
0
255
170
N443 UNICOLOR
0
127
80
N443 SCOLOR
0
31
25
N443TINT
0
127
74
PAL-M BRIGHTNESS
0
255
170
PAL-M UNICOLOR
0
127
80
PAL-M SCOLOR
0
31
25
PAL-M TINT
0
127
74
R-ADJ
0
255
128
  One blank line.
9
LC-121M2E
LC-150M2E
LC-121M2E
LC-150M2E
4
PAL/SECAM OSC
0
255
128
PAL BRIGHTNESS
0
255
170
PAL UNICOLOR
0
127
80
PAL SCOLOR
0
31
25
PAL TINT
0
127
74
BELL F0
0
255
120
B-Y BLACK LEVEL
0
15
8
R-Y BLACK LEVEL
0
15
8
SECAM BRIGHTNESS
0
255
170
SECAM UNICOLOR
0
127
80
SECAM COLOR
0
127
75
SECAM TINT
0
127
74
5
DVD NT BRIGHTNESS
0
255
170
DVD NT UNICOLOR
0
127
80
DVD NT COLOR
0
127
75
DVD NT TINT
0
127
74
DVD NT R-YPHASE
0
3
2
DVD NT B-YPHASE
0
3
3
DVD PAL BRIGHTNESS
0
255
170
DVD PAL UNICOLOR
0
127
80
DVD PAL COLOR
0
127
75
DVD PAL TINT
0
127
74
I
2
C DATA
000000
I
2
C DATA
WAIT
WAIT/SEND
6
TEST PATTERN
OFF
ON/OFF
G/A DATA
0000
G/A DATA
WAIT
WAIT/SEND
DIGITAL SYNC SEP.
0
FF
87
Fixed
AV NTSC H
0
7F
18
Fixed
DVD NTSC H
0
7F
1C
Fixed
AV PAL H
0
7F
11
Fixed
DVD PAL H
0
7F
15
Fixed
AV SECAM H
0
7F
0E
Fixed
NT/PALM V
1
1F
0C
Fixed
PAL V
1
1F
0B
Fixed
SECAM V
1
1F
0B
Fixed
7
N443 R-YPHASE
0
3
2
Fixed
N443 B-YPHASE
0
3
1
Fixed
PAL R-YPHASE
0
3
2
Fixed
PAL B-YPHASE
0
3
1
Fixed
PAL-M R-YPHASE
0
3
2
Fixed
PAL-M B-YPHASE
0
3
1
Fixed
SECAM R-YPHASE
0
3
2
Fixed
SECAM B-YPHASE
0
3
1
Fixed
DVD PAL R-YPHASE
0
3
2
Fixed
DVD PAL B-YPHASE
0
3
1
Fixed
COLOR
0
127
60
Fixed
SCONT
0
31
18
Fixed
10
LC-121M2E
LC-150M2E
LC-121M2E
LC-150M2E
5-6. Service Adjusting
5-6-1. Basic Adjustment
Adjustment
Adjusting conditions
Adjusting method
1
+B Adjustment
1. Connect the DC voltmeter to
1. Adjust +B-ADJ to 5.1V 
±
 0.05V.
TP1104
( DAC 9ch )
2
Model setup
1. Make sure that M2H has been set.
When M2H is selected, the item
(Not setting M2E)
settings are as follows.
TUNER
OFF
AUDIO MULTIPLEX
OFF
BOOSTER
0
SYSTEM
AUTO
COPY GUARD
ON
CH MEMORY
OFF
SECAM
ON
MULTI LANG.
OFF
TIMER
OFF
3
Counter-bias adjustment
1. Set the AV1 mode to set signal
1. Adjust COM so as to minimize the
noninput state.
waveform peak-peak.
2. Fit the specified adjusting instrument
(DAC7ch)
to the screen center.
3. Observe the adjusting instrument
output on the oscilloscope.
4
NTSC / PAL-MOSC
1. Input the monoscope pattern of
1. Adjust NTSC/PALM OSC so as to
adjustment
NTSC into AV1.
get the normal screen.
(DAC8ch)
8
DAC 2  1ch
0
255
0
Fixed
DAC 2  2ch
0
255
0
Fixed
DAC 2  3ch
0
255
0
Fixed
DAC 2  4ch
0
255
0
Fixed
DAC 2  5ch
0
255
0
Fixed
DAC 2  6ch
0
255
0
Fixed
DAC 2  7ch
0
255
0
Fixed
DAC 2  8ch
0
255
0
Fixed
DAC 2  9ch
0
255
0
Fixed
DAC 2  10ch
0
255
0
Fixed
DAC 2  11ch
0
255
0
Fixed
DAC 2  12ch
0
255
0
Fixed

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