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PDF RT-37LZ55 Data sheet ( Hoja de datos )
| Número de pieza | RT-37LZ55 | |
| Descripción | LCD TV SERVICE MANUAL | |
| Fabricantes | LG | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT-37LZ55 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
LCD TV
SERVICE MANUAL
CHASSIS : ML-051B
MODEL : RZ/RT-37LZ55
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
1 page  
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the
circuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by gently
prying up on the lead with the soldering iron tip as the solder
melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing the
IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete Transistor
Removal/Replacement
1. Remove the defective transistor by clipping its leads as close as
possible to the component body.
2. Bend into a "U" shape the end of each of three leads remaining
on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding
leads extending from the circuit board and crimp the "U" with
long nose pliers to insure metal to metal contact then solder
each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit
board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as
possible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and if
necessary, apply additional solder.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow
stake.
2. Securely crimp the leads of replacement component around
notch at stake top.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board to
prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed whenever
this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper pattern
side of the circuit board. (Use this technique only on IC
connections).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely necessary).
2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper
pattern and let it overlap the previously scraped end of the good
copper pattern. Solder the overlapped area and clip off any
excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly
connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the
nearest component on one side of the pattern break to the lead
of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.
-5-
5 Page 
ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet is applied to all of the ML-051B chassis
(TORNADO) manufactured at LG TV Plant
2. Specification.
2.1 Because this is not a hot chassis, it is not necessary to
use an isolation transformer. However, the use of
isolation transformer will help to protect test
instruments.
2.2 Adjustment must be done in the correct sequence.
2.3 The adjustment must be performed at 25±5°C
temperature and 65±10% relative humidity if there is
no specified designation.
2.4 The input voltage of the receiver must be kept between
100~220V, 50/60Hz.
2.5 Before adjustment, execute Heat-Run for 30 minutes
at RF no signal.
3. EDID
* Caution
- Use the proper signal cable for EDID Download
Analog EDID: Pin3 exists
Caution: - Never connect HDMI & DVI-D & DVI-A Cable
at the same time.
- Use the proper cables below for EDID Writing
No Item
Content
Hexadecimal
1 Manufacturer ID
GSM
1E6D
2 Version
Digital 1
01
3 Revision
Digital 3
03
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 02 03 21 D1 46 85 04 02 01 03 00 23 09 07 07 23
10 09 07 07 23 09 07 07 83 01 00 00 65 03 0C 00 10
20 00 01 1D 00 80 51 D0 1C 20 40 80 35 00 BC 88 21
30 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E 96 00 13
40 8E 21 00 00 18 2A 12 00 10 41 43 17 20 28 60 35
50 00 00 00 32 00 00 1C 01 1D 80 18 71 1C 16 20 58
60 2C 25 00 C4 8E 21 00 00 00 9E 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 DB
=> Detail EDID Options are below(a, b, c, d, e)
a. Product ID
Model name
RZ-37LZ55
RT-37LZ55
RM-37LZ55
Product ID
30045(A)
30046(A)
30051(A)
30052(D)
30053(A)
30054D)
Product ID
Dec Hex EDID Table
30045(A) 755D 5D75
30046(D) 755E 5E75
30051(A) 7563 6375
30052(D) 7564 6475
30053(A) 7565 6575
30054(D) 7566 6675
b. Serial No : Controlled on production line
c. Month, Year : Controlled on production line
d. Model Name(Hex) :
Model Name
RZ-37LZ55
RT-37LZ55
RM-37LZ55
Model Name(HEX)
525A2D33374C5A3535
52542D33374C5A3535
524D2D33374C5A3535
e. Checksum: ChangeSable by total EDID data
3.1 Data
3.1.1 ANALOG(128Bytes)
3.2.2 DIGITAL(128Bytes)
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 00 FF FF FF FF FF FF 00 1E 6D a
b
10 c 01 03 01 46 27 78 EA D9 B0 A3 57 49 9C 25
20 11 49 4B A5 6E 80 31 40 01 01 01 01 45 40 01 01
30 61 40 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88
40 35 00 BC 88 21 00 00 1C 4E 1F 00 80 51 00 1E 30
50 40 80 37 00 BC 88 21 00 00 18 00 00 00 FD 00 38
60 4B 1F 3D 09 00 0A 20 20 20 20 20 20 00 00 00 FC
70 d 0A 20 20 20 00 e
3.2.3 EDID FOR HDMI(256Bytes)
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 00 FF FF FF FF FF FF 00 1E 6D a
b
10 c 01 03 80 46 27 78 EA D9 B0 A3 57 49 9C 25
20 11 49 4B A5 6E 80 31 40 01 01 01 01 45 40 01 01
30 61 40 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88
40 35 00 BC 88 21 00 00 1C 4E 1F 00 80 51 00 1E 30
50 40 80 37 00 BC 88 21 00 00 18 00 00 00 FC 00 52
60 d 0A 20 20 20 00 00 00 FD
70 00 38 4B 1F 3D 09 00 0A 20 20 20 20 20 20 01 e
- 11 -
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet RT-37LZ55.PDF ] | |
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