DOWNLOAD LG 32LN545B-CT (CHASSIS:LD31B / LD36B) Service Manual ↓ Size: 42.77 MB | Pages: 87 in PDF or view online for FREE

Model
32LN545B-CT (CHASSIS:LD31B LD36B)
Pages
87
Size
42.77 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
32ln545b-ct-chassis-ld31b-ld36b.pdf
Date

LG 32LN545B-CT (CHASSIS:LD31B / LD36B) Service Manual ▷ View online

- 5 -
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through 
which the IC leads are inserted and then bent flat against the cir-
cuit 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 remain-
ing 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 pos-
sible 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 when-
ever 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 connec-
tions).
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 con-
nected 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.
LGE                                            Display Division                                  LG(51) 
Establish : 12/08/31                                                                                                                                                                                                                                            1 
Reform:    12/08/31                                                                                                                                                                                                                                                      47 
                                                                                                                                                                                                                                          LG  전자 
NetCast 4.0 Low – LC36B Product Specification 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Product Specification
LC36B 
TV Research lab. 
TV Product Development. 
LG ELECTRONICS Inc. 
LGE                                            Display Division                                  LG(51) 
Establish : 12/08/31                                                                                                                                                                                                                                            2 
Reform:    12/08/31                                                                                                                                                                                                                                                      47 
                                                                                                                                                                                                                                          LG  전자 
NetCast 4.0 Low – LC36B Product Specification 
 Revision history   
 
Revision no.  Effective data. 
Version 
Contents 
Revised by
 
2012.08.31 
1.00 
Draft 
DH.LEE 
2012.09.21 
1.01 
Add 47LN5400-CA Model   
Hun.Heo 
2012.09.26 
1.02 
Add Lumi & DCR spec in 47LN5400-CA 
Hun.Heo 
2012.10.08 
1.03 
Revise Chassis Name 
Hun.Heo 
2012.10.13 
1.04 
Add 47LN5400-CA EEI Grade and Revise Accessory   
Hun.Heo 
2012.10.17 
1.05 
Revise 9. Chroma & Brightness
 
and Add 9.3 Set Optical Feature_Luminance Uniformity
 
Hun.Heo 
2012.10.26 
1.06 
Revise 13.1 Component Video Input (Y, PB, PR)
   
Hun.Heo 
2012.11.08 
1.07 
Add 9. Chroma & Brightness _47LN5400-CA Model Lnmi. Typ vaule and Revise 32inch Model Lumi.Uniformity 
Hun.Heo 
2012.11.30 
1.08 
Add 32/42/55 module Spec, Modify the Optic and Display Spec 
Koo Jun Beom 
10 
2012.12.04 
1.09 
Revise 9.2 Set optical feature_W/B Table 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
LGE                                            Display Division                                  LG(51) 
Establish : 12/08/31                                                                                                                                                                                                                                            3 
Reform:    12/08/31                                                                                                                                                                                                                                                      47 
                                                                                                                                                                                                                                          LG  전자 
NetCast 4.0 Low – LC36B Product Specification 
- Contents - 
1. Application Range 
2. Test condition 
3. Test Method 
4. Electrical Specification 
5. Feature and Function 
6. Safety and Regulation 
7. Video 
8. Digital Receiver 
9. Display 
10. Audio 
11. Power 
12. Standard Level For Input Signal (Video, Audio, Y/C, Component, RGB) 
13. External Input Support Format 
14. USB input 
15. Magic Remocon & 3D Emmiter(Spec out)   
16. Wi-Fi(Spec out) 
17. LED Control 
18. Function and Reliability test specification 
19. SET factoring condition 
20. Accessories 
21. EEI(Energy Efficiency Index)
Page of 87
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LG 32LN545B-CT (CHASSIS:LD31B / LD36B) Service Manual ▷ Download

  • DOWNLOAD LG 32LN545B-CT (CHASSIS:LD31B / LD36B) Service Manual ↓ Size: 42.77 MB | Pages: 87 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the LG 32LN545B-CT (CHASSIS:LD31B / LD36B) in PDF for free, which will help you to disassemble, recover, fix and repair LG 32LN545B-CT (CHASSIS:LD31B / LD36B) LCD. Information contained in LG 32LN545B-CT (CHASSIS:LD31B / LD36B) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.