LC-121M2E (serv.man2) - Sharp TV Service Manual (repair manual)

lc-121m2e (serv.man2) service manual
Model
LC-121M2E (serv.man2)
Pages
56
Size
5.19 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
lc-121m2e-sm2.pdf
Date

Read Sharp LC-121M2E (serv.man2) 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
Page of 56
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Here you can read online and download Sharp LC-121M2E (serv.man2) Service Manual in PDF. LC-121M2E (serv.man2) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp LC-121M2E (serv.man2) LCD. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.