Sharp LC-32RD2 User manual

SAFETY PRECAUTION
IMPORTANT SERVICE SAFETY
PRECAUTION ................................................ i
Precautions for using lead-free solder........... ii
CHAPTER 1. OPERATION MANUAL
[1] SPECIFICATIONS......................................1-1
[2] OPERATION MANUAL...............................1-2
[3] DIMENSIONS.............................................1-7
CHAPTER 2. REMOVING OF MAJOR PARTS
[1] REMOVING OF MAJOR PARTS
(LC-32RD2E/S/RU) ....................................2-1
[2] REMOVING OF MAJOR PARTS
(LC-37RD2E/S/RU) .................................. 2-11
CHAPTER 3. ADJUSTMENT PROCEDURE
[1] After replacement of any PWB and/or IC for
repair, note the following.............................3-1
[2] SOFTWARE UPDATING ............................3-1
[3] Entering and exiting the adjustment pro-
cess mode ................................................3-16
[4] Remote controller key operation and de-
scription of display in adjustment process
mode.........................................................3-16
[5] Adjustment process mode menu ..............3-17
[6] Special features ........................................3-18
[7] Video signal adjustment procedure ..........3-19
[8] White Balance Adjustment .......................3-20
[9] Initialization to factory settings..................3-21
[10] Lamp error detection ................................3-21
[11] Public Mode (Hotel Mode) ........................3-22
CHAPTER 4. TROUBLESHOOTING TABLE
[1] TROBLESHOOTING TABLE......................4-1
CHAPTER 5. MAJOR IC INFORMATIONS
[1] MAJOR IC INFORMATIONS....................... 5-1
CHAPTER 6. OVERALL WIRING DIAGRAM/BLOCK
DIAGRAM
[1] OVERALL WIRING DIAGRAM
(LC-32RD2E/S/RU)..................................... 6-1
[2] OVERALL WIRING DIAGRAM
(LC-37RD2E/S/RU)..................................... 6-3
[3] MAIN BLOCK DIAGRAM ............................ 6-5
[4] SYSTEM BLOCK DIAGRAM ...................... 6-7
[5] POWER BLOCK DIAGRAM ....................... 6-9
CHAPTER 7. PRINTED WIRING BOARD
[1] MAIN UNIT PRINTED WIRING BOARD..... 7-1
[2] AV UNIT PRINTED WIRING BOARD ......... 7-9
[3] POWER UNIT PRINTED WIRING
BOARD ..................................................... 7-15
[4] D-TUNER UNIT PRINTED WIRING
BOARD ..................................................... 7-17
[5] KEY UNIT PRINTED WIRING BOARD .... 7-18
[6] R/C, LED UNIT PRINTED WIRING
BOARD ..................................................... 7-19
[7] SIDE TERMINAL UNIT PRINTED WIRING
BOARD ..................................................... 7-20
[8] DIGITAL UNIT PRINTED WIRING
BOARD ..................................................... 7-21
CHAPTER 8. SCHEMATIC DIAGRAM
[1] DESCRIPTION OF SCHEMATIC
DIAGRAM ................................................... 8-1
[2] SCHEMATIC DIAGRAM ............................. 8-2
Parts Guide
SERVICE MANUAL
CONTENTS
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.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
LC-32RD2E/S/RU, LC-37RD2E/S/RU
No. S37C1LC32RD2E
LCD COLOUR TELEVISION
LC-32RD2E/S/RU
LC-37RD2E/S/RU
MODELS
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.

LC-32RD2E/S/RU, LC-37RD2E/S/RU
i
LC32RD2E Service Manual
SAFETY PRECAUTION
IMPORTANT SERVICE SAFETY PRECAUTION
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)
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 paral-
leled by a 0.15µF capacitor in series with all exposed metal cabinet
parts and a known earth ground, such as electrical conduit or elec-
trical 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.
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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.
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the
servicing guidelines which follow:
CAUTION:
FOR CONTINUED PROTECTION AGAINST A
RISK OF FIRE REPLACE ONLY WITH SAME
TYPE FUSE.
F701 (4A/250V)
DVM
AC SCALE
1.5k ohm
10W
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
0.15 µ F
TEST PROBE

LC-32RD2E/S/RU, LC-37RD2E/S/RU
ii
Precautions for using lead-free solder
Employing lead-free solder
• “PWBs” of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The
alphabetical character following LF shows the type of lead-free solder.
Example:
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 dam-
age 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.
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.
• Be careful when replacing parts with polarity indication on the PWB silk.
Lead-free wire solder for servicing
LFa
Indicates lead-free solder of tin, silver and copper.
LF a/a
Indicates lead-free solder of tin, silver and copper.
Part No. Description Code
ZHNDAi123250E J φ0.3mm 250g (1roll) BL
ZHNDAi126500E J φ0.6mm 500g (1roll) BK
ZHNDAi12801KE J φ1.0mm 1kg (1roll) BM

LC-32RD2E/S/RU, LC-37RD2E/S/RU
1 – 1
LC32RD2E Service Manual
CHAPTER 1. OPERATION MANUAL
[1] SPECIFICATIONS

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[2] OPERATION MANUAL

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LC-32RD2E/S/RU, LC-37RD2E/S/RU
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LC-32RD2E/S/RU, LC-37RD2E/S/RU
1 – 5

LC-32RD2E/S/RU, LC-37RD2E/S/RU
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LC-32RD2E/S/RU, LC-37RD2E/S/RU
1 – 7
[3] DIMENSIONS

LC-32RD2E/S/RU, LC-37RD2E/S/RU
2 – 1
LC32RD2E Service Manual
CHAPTER 2. REMOVING OF MAJOR PARTS
[1] REMOVING OF MAJOR PARTS (LC-32RD2E/S/RU)
1. Remove the 9 lock screws , and the 4 lock screws . Detach the Rear Cabinet.
2. Remove the 3 lock screws . Detach the Bottom Cover.
3. Remove the 6 lock screws . Detach the Support Angle and Stand Angle.
12
Rear Cabinet
1
2
3
4
Bottom Cover
Stand Angle
Support Angle
4
3

LC-32RD2E/S/RU, LC-37RD2E/S/RU
2 – 2
4. Remove the 2 lock screws . Detach the Top Cover.
5. Remove the 6 lock scrwes . Detach the Center Angle-L/R.
5
Wire "KM" into WH
Top Cover Ass'y
Wire "KM" (to P153)
5
6
Center Angle L
Center Angle R
6

LC-32RD2E/S/RU, LC-37RD2E/S/RU
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6. Remove the 2 lock scrwes . Detach the Digital Shield.
7
Wire Tie
Ferrite Core (to Wire "RA")
DIGITAL SHIELD
7

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7. Remove all the connectors from PWBs.
Wire "SP", "RA" to WH
Wire "RA" to WH
Check that tape is wound up to wire "RA", "SP"
Wire tie of wire "RA" and "SP"
Ferrite core of wire "RA", "SP"
Between each Red/Black
Between each White/Black
To pin of cabinet

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8. Remove the 2 lock screws . Detach the Speakers.
8
Ferrite Core (to Wire "RA", "SP")
Speaker-R
Speaker-L
Wire "RA" (to P2303)
Wire "SP" (to P301)
8

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2 – 6
9. Remove the 3 lock screws . Detach the D-Tuner Unit.
9
Wire "LB" (to CN7502)
Wire "LA" (to CN7501)
Shapewire"LB"underwire"LA"
Wire "RA" to "WH "
D-Tuner Unit
B to B connector (to SC2705)
9

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10.Remove the 5 lock screws . and detach the Chassis Tray Unit.
10
Wire "LV" (to CN1)
Wire "LV" into Edge Saddle
Chassis Tray Unit
Wire "SH" (to CN2)
Chassis Tray Unit
Wire "LV" (to P2305)
Red wire
Red wire
Wire "SH" into WH
10

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11.Remove the 9 lock screws , 3 lock screws and 2 lock screws and detach the LCD Angle.
11 12 13
Inside
13
11
12
LCD Angle C
LCD Panel
Cabinet-A Ass'y
Base of LCD Panel positioning
LCD Angle A
LCD Angle B

LC-32RD2E/S/RU, LC-37RD2E/S/RU
2 – 9
12.Remove the 2 lock screws . and detach the R/C, LED Unit.
13.Remove the 4 lock screws . and detach the Tweeters.
14
HIMELON
Pull wire out to bottom side
Bottom
R/C, LED Unit
Wire "RA"
R/C, LED Unit
Connect
14 14
15
HIMELON
Tweeter
15 15

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14.Remove the 4 lock screws . and detach the Front Cabinet.
16
FRONT CABINET
16
16
16
16