Read Sharp LC-32GA4E (serv.man2) Service Manual online
LC-32GA4E
LC-37GA4E
LC-37GA4E
SERVICE MANUAL
LCD COLOR TELEVISION
MODELS
LC-32GA4E
LC-37GA4E
LC-37GA4E
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.
to its original condition and only parts identical to those specified should be used.
SHARP CORPORATION
CONTENTS
Page
»
LIST OF CHANGED PARTS ...........................................................................................................................2
»
IMPORTANT SERVICE SAFETY PRECAUTION ........................................................................................ 4
»
SPECIFICATIONS ........................................................................................................................................6
»
OPERATION MANUAL ................................................................................................................................ 7
»
DIMENSIONS ............................................................................................................................................13
»
REMOVING OF MAJOR PARTS ................................................................................................................15
»
DESCRIPTION OF SCHEMATIC DIAGRAM .............................................................................................21
»
SCHEMATIC DIAGRAM .............................................................................................................................22
»
PARTS LIST ...............................................................................................................................................26
»
PACKING OF THE SET .............................................................................................................................36
OUTLINE
This model is based on the LC-32/37GA3E and is equipped with a redesigned speaker. This Service Manual
covers the modifications alone. For the other points, refer to the LC-32/37GA3E Service Manual.
covers the modifications alone. For the other points, refer to the LC-32/37GA3E Service Manual.
S84Z1LC37GA4E
2
LC-32GA4E
LC-37GA4E
LC-37GA4E
LIST OF CHANGED PARTS
LC-32GA3E
→
LC-32GA4E
Ref.No.
Description
LC-32GA3E
LC-32GA4E
Note
PWB ASSEMBLIES
LCD CONTROL Unit
DUNTKC268VJ89
DUNTKC268VJ90
Some parts changed
CPU Unit
DUNTKC427VJ21
MAIN Unit
DUNTKC585VJ13 (E)
DUNTKC585VJ16 (E)
No parts changed
DUNTKC585VJ14 (K)
DUNTKC585VJ17 (K)
No parts changed
DUNTKC585VJ19 (F)
DUNTKC585VJ18 (F)
No parts changed
DUNTKC585VJ34 (I)
DUNTKC585VJ37 (I)
No parts changed
DUNTKC585VJ36 (R)
DUNTKC585VJ38 (R)
No parts changed
DVI Unit
DUNTKC595VJ17
DUNTKC595VJ18
No parts changed
AV Unit
DUNTKC642UJ01 (E/I/R)
DUNTKC642UJ04 (E/I/R)
No parts changed
DUNTKC642UJ02 (K)
DUNTKC642UJ05 (K)
No parts changed
DUNTKC642UJ03 (F)
DUNTKC642UJ06 (F)
No parts changed
KEY Unit
DUNTKC643UJ01 (E/I/R)
DUNTKC643UJ04 (E/I/R)
No parts changed
DUNTKC643UJ02 (K)
DUNTKC643UJ05 (K)
No parts changed
DUNTKC643UJ03 (F)
DUNTKC643UJ06 (F)
No parts changed
R/C LED Unit
DUNTKC644UJ01 (E/I/R)
DUNTKC644UJ04 (E/I/R)
No parts changed
DUNTKC644UJ02 (K)
DUNTKC644UJ05 (K)
No parts changed
DUNTKC644UJ03 (F)
DUNTKC644UJ06 (F)
No parts changed
EXT SP TERMINAL Unit
DUNTKC645UJ01 (E/I/R)
DUNTKC645UJ04 (E/I/R)
No parts changed
DUNTKC645UJ02 (K)
DUNTKC645UJ05 (K)
No parts changed
DUNTKC645UJ03 (F)
DUNTKC645UJ06 (F)
No parts changed
FRONT Unit
DUNTKC646UJ01 (E/I/R)
DUNTKC646UJ04 (E/I/R)
No parts changed
DUNTKC646UJ02 (K)
DUNTKC646UJ05 (K)
No parts changed
DUNTKC646UJ03 (F)
DUNTKC646UJ06 (F)
No parts changed
POWER Unit
RDENCA068WJZZ
INVERTER-A Unit
RUNTKA069WJZZ
INVERTER-B Unit
RUNTKA070WJZZ
INVERTER-A-GND Unit
RUNTKA071WJZZ
INVERTER-B-GND Unit
RUNTKA072WJZZ
1-Bit Amplifier Unit
B2SX4102BT
LCD PANEL
32” Wide LCD Panel Unit
RLCDTA028WJZZ
LCD CONTROL Unit
R2026
Metal Oxide
VRS-CY1JF223JY
Delete
R2029
Metal Oxide
VRS-CY1JF223JY
Add
CABINET AND MECHANICAL PARTS
Please refer to a Parts list.
PACKING PARTS AND ACCESSORIES
Please refer to a Parts list.
3
LC-32GA4E
LC-37GA4E
LC-37GA4E
LIST OF CHANGED PARTS
LC-37GA3E
→
LC-37GA4E
Ref.No.
Description
LC-37GA3E
LC-37GA4E
Note
PWB ASSEMBLIES
LCD CONTROL Unit
DUNTKC268VJ91
DUNTKC268VJ92
Some parts changed
CPU Unit
DUNTKC427VJ21
MAIN Unit
DUNTKC585VJ21 (E)
DUNTKC585VJ24 (E)
No parts changed
DUNTKC585VJ22 (K)
DUNTKC585VJ25 (K)
No parts changed
DUNTKC585VJ23 (F)
DUNTKC585VJ26 (F)
No parts changed
DUNTKC585VJ39 (I)
DUNTKC585VJ42 (I)
No parts changed
DUNTKC585VJ40 (R)
DUNTKC585VJ43 (R)
No parts changed
DVI Unit
DUNTKC595VJ19
DUNTKC595VJ20
No parts changed
AV Unit
DUNTKC642UJ07 (E/I/R)
DUNTKC642UJ11 (E/I/R)
No parts changed
DUNTKC642UJ08 (K)
DUNTKC642UJ12 (K)
No parts changed
DUNTKC642UJ10 (F)
DUNTKC642UJ13 (F)
No parts changed
KEY Unit
DUNTKC643UJ07 (E/I/R)
DUNTKC643UJ11 (E/I/R)
No parts changed
DUNTKC643UJ08 (K)
DUNTKC643UJ12 (K)
No parts changed
DUNTKC643UJ10 (F)
DUNTKC643UJ13 (F)
No parts changed
R/C LED Unit
DUNTKC644UJ07 (E/I/R)
DUNTKC644UJ11 (E/I/R)
No parts changed
DUNTKC644UJ08 (K)
DUNTKC644UJ12 (K)
No parts changed
DUNTKC644UJ10 (F)
DUNTKC644UJ13 (F)
No parts changed
EXT SP TERMINAL Unit
DUNTKC645UJ07 (E/I/R)
DUNTKC645UJ11 (E/I/R)
No parts changed
DUNTKC645UJ08 (K)
DUNTKC645UJ12 (K)
No parts changed
DUNTKC645UJ10 (F)
DUNTKC645UJ13 (F)
No parts changed
FRONT Unit
DUNTKC646UJ07 (E/I/R)
DUNTKC646UJ11 (E/I/R)
No parts changed
DUNTKC646UJ08 (K)
DUNTKC646UJ12 (K)
No parts changed
DUNTKC646UJ10 (F)
DUNTKC646UJ13 (F)
No parts changed
POWER Unit
RDENCA068WJZZ
INVERTER-A Unit
RUNTKA080WJZZ
INVERTER-B Unit
RUNTKA081WJZZ
INVERTER-A-GND Unit
RUNTKA082WJZZ
INVERTER-B-GND Unit
RUNTKA083WJZZ
1-Bit Amplifier Unit
B2SX4102BT
LCD PANEL
37” Wide LCD Panel Unit
RLCDTA027WJZZ
LCD CONTROL Unit
R2026
Metal Oxide
VRS-CY1JF223JY
Delete
R2029
Metal Oxide
VRS-CY1JF223JY
Add
CABINET AND MECHANICAL PARTS
Please refer to a Parts list.
PACKING PARTS AND ACCESSORIES
Please refer to a Parts list.
4
LC-32GA4E
LC-37GA4E
LC-37GA4E
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SAFETY NOTICE
Many electrical and mechanical parts in Liquid Crystal
c o l o r t e l ev i s i o n h a ve s p e c i a l s a fe t y - r e l a t e d
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
c o l o r t e l ev i s i o n h a ve s p e c i a l s a fe t y - r e l a t e d
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 “
å
”
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.
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.
WARNING
1. For continued safety, no modification of any circuit
should be attempted.
2. Disconnect AC power before servicing.
BEFORE RETURNING THE RECEIVER
(Fire & Shock Hazard)
(Fire & Shock Hazard)
Before returning the receiver to the user, perform
the following safety checks:
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.
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.
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 220~240 volt AC outlet.
»
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.
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 resistor.
or higher, sensitivity 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 0.75V rms (this corresponds to 0.5
mA rms AC.) or more is excessive and indicates a
potential shock hazard which must be corrected
before returning the monitor to the owner.
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 rms (this corresponds to 0.5
mA rms AC.) or more is excessive and indicates a
potential shock hazard which must be corrected
before returning the monitor to the owner.
IMPORTANT SERVICE SAFETY PRECAUTION
Ë
Service work should be performed only by qualified service technicians who are thor-
oughly familiar with all safety checks and the servicing guidelines which follow:
oughly familiar with all safety checks and the servicing guidelines which follow:
DVM
AC SCALE
50k ohm
10W
TO EXPOSED
METAL PARTS
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
KNOWN EARTH
GROUND
0.15 µF
TEST PROBE
C A U T I O N : F O R C O N T I N U E D
PROTECTION AGAINST A RISK OF
FIRE REPLACE ONLY WITH SAME
FUSE
PROTECTION AGAINST A RISK OF
FIRE REPLACE ONLY WITH SAME
FUSE
LC-32GA4E:
F1701, F1702 (6.3A, 250V),
LC-32GA4E:
F1703 (2.0A, 250V)
LC-32GA4E: F7401,F7501 (6.3A, 250V)
LC-37GA4E: F7401,F7501 (10A, 250V)
LC-37GA4E: F7401,F7501 (10A, 250V)
