LG 22LS2100 (CHASSIS:LD93Q / LP93Q) 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 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 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 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 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.
- 6 -
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement.
1. Application range
This spec sheet is applied to the 22” LED Monitor TV used
LD93Q chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C
2) Relative Humidity: 65 % ± 10 %
3) Power Voltage
: Standard input voltage (AC 100-240 V~, 50/60 Hz)
* Standard Voltage of each products is marked by models.
4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
5) The receiver must be operated for about 5 minutes prior to
the adjustment.
3. Test method
1) Performance: LGE TV test method followed
2) Demanded other specification
- Safety : CE, IEC specification
- EMC : CE, IEC
4. General Specification
4.1. RGB-PC
No.
Item
Specification
Remarks
1
Supported Sync. Type
Separate Sync.(RGB), SOG
2
Operating Frequency
Analog
Horizontal
30 ~ 69 kHz
Vertical
56 ~ 61 Hz
3
Operating Frequency
Analog
Max
1920×1080 @ 60Hz
Recommend 1920×1080 @ 60Hz
4
Input Voltage
Voltage :100 – 240 Vac, 50 or 60 Hz
5
Inrush Current
Cold Start : 50 A, Hot : 120 A
6
Operating Condition
Sync (H/V) Video
LED
Wattage
Power S/W On
On mode
On/On
Active
Off(PTN,PMN)
48(Max)
On/On
Active
27(Typ.)
Sleep mode
Off/On
Off
Blanking
1W
RGB
On/Off
Power S/W Off
Off mode
-
Off
Red (PTN_PMN) 0.5W
Just operate power key and remote
controller power button.
7
MTBF
30,000 HRS with 90 % Confidence level
Lamp Life : 30,000 Hours(min)
8
Using Altitude
5,000 m (for Reliability) 3,000m(for FOS)
9
Operating Environment
Temp : 10 °C ~ 35 °C
Humidity : 20 % ~ 80 %
10 Storage Environment
Temp : -10 °C ~ 60 °C non condensing
Humidity : 5 % ~ 90 % non condensing
- 7 -
No.
Item
Specification
Remarks
1.
Market
NON EU
2.
Broadcasting system
PAL B/G/DK,/I,
NTSC-M
3.
Available Channel
(Revision 21: 10.12.08)
BAND
PAL
NTSC
China(DK)
Australia(BG)
VHF/UHF
C1~C69
2~78
VHF/UHF
C1~C62
C1~C75
CATV
S1~S41
1~71
CATV
S1~S41
S2~S44
4.
Receiving system
Upper Heterodyne
5.
CVBS Input (1EA)
PAL, SECAM, NTSC
4 System(Rear) :PAL50, SECAM, NTSC, PAL60
6.
RGB Input
RGB-PC
Analog (D-SUB 15Pin)
7.
HDMI Input (1EA)
HDMI-DTV
HDMI version 1.3 , Support HDCP
8.
Audio Input (1EA)
CVBS
L/R Input
4.2. TV
5. RGB Input ( PC )
No.
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
Remark
1
640*480
31.469
59.94
25.175
2
800*600
37.879
60.317
40.0
3
1024*768
48.363
60.0
65.0
4
1152*864
54.34
60.05
80
5
1280*1024
63.981
60.02
108.0
6
1600*900
55.54
60
97.75
7
1680*1050
64.674
59.883
119.0
8
1680*1050
65.290
59.954
146.25
9
1920*1080
67.5
60
148.5
6. HDMI Input (DTV)
No
Resolution
H-freq(kHz)
V-freq.(kHz)
Pixel clock(MHz)
Proposed
Remarks
1
720*480
15.75
60.00
13.514
SDTV, DVD 480I(525I)
Support(not spec)
2
720*480
15.73
59.94
13.500
SDTV, DVD 480I(525I)
Support(not spec)
3
720*576
15.625
50.00
13.500
SDTV, DVD 576I(625I) 50Hz
Support(not spec)
4
720*480
31.47
59.94
27.000
SDTV 480P
5
720*480
31.50
60.00
27.027
SDTV 480P
6
720*576
31.25
50.00
27.000
SDTV 576P 50Hz
7
1280*720
44.96
59.94
74.176
HDTV 720P
8
1280*720
45.00
60.00
74.250
HDTV 720P
9
1280*720
37.50
50.00
74.25
HDTV 720P 50Hz
10
1920*1080
33.72
59.94
74.176
HDTV 1080I
11
1920*1080
33.75
60.00
74.250
HDTV 1080I
12
1920*1080
28.125
50.00
74.250
HDTV 1080I 50Hz
13
1920*1080
67.432
59.94
148.350
HDTV 1080P
14
1920*1080
67.5
60
148.5
HDTV 1080P
15
1920*1080
56.250
50
148.5
HDTV 1080P 50Hz
* HDMI jack is for AV(video signal)
- 8 -
ADJUSTMENT INSTRUCTION
1. Application Range
This document is applied to LD93Q chassis 22” LED Monitor
TV which is manufactured in TV Factory or is produced on the
basis of this data.
2. Designation
(1) The adjustment is according to the order which is designated
and which must be followed, according to the plan which
can be changed only on agreeing.
(2) Power adjustment : Free Voltage.
(3) Magnetic Field Condition: Nil.
(4) Input signal Unit: Product Specification Standard.
(5) Reserve after operation : Above 5 Minutes (Heat Run)
Temperature : at 25 °C ± 5 °C
Relative humidity : 65 ± 10 %
Input voltage : 220 V, 60 Hz
(6) Adjustment equipments: Color Analyzer (CA-210 or
CA-110), Pattern Generator (MSPG-925L or Equivalent),
DDC Adjustment Jig equipment, SVC remote control
3. ADC calibration
3.1. PC input ADC
(1) Auto RGB Gain/Offset Adjustment
■ Convert to PC in Input-source
■ Signal equipment displays
Output Voltage: 700mVp-p
Impress Resolution XGA (1024 x 768 @ 60Hz)
Model: 60 in Pattern Generator (1024X768@60Hz 16
step Gray Pattern)
Pattern: 29 in Pattern Generator (MSPG-925 Series)
■ Adjust by commanding AUTO_COLOR_ADJUST (0xF1)
0x00 0x02 instruction
(2) Confirmation
■ We confirm to address “0xF1” in page “0xBC” of
EEPROM the value is “0xAA” or not.
■ If the value is not “0xAA,” we adjust once more
■ We can write the ADC values from “0x00~0x05”
addresses in a page “0x0E”
* Manual ADC process using Service Remocon. After enter
Service Mode by pushing “ADJ” key, Execute “Auto-RGB”
by pushing “►” key at “Auto-RGB.”
4. Adjustment items
4.1. PCB assembly adjustment items
4.1.1. Input Tool-Option, Area Option
- Option adjustment following BOM (Tool Option, Area Option)
(1) Required Equipments
: Remote control for adjustment
(2) Profile: Must be changed the option value because being
different with some setting value Depend on module
maker, inch and market.
(3) Adjustment method
The input methods are same as other chassis. (Use
IN-START key on the Adjust Remote control.)
1) Push the IN-START key in the Adjust R/C.
2) Input the Option Number that was specified in the BOM,
into the Shipping area.
3) Select “Tool Option/ Area Option” by using ▲/▼(CH+/-)
key, and press the number key(0~9) consecutively
Ex) if the value of Tool Option1 is 7, input the data using
number key “7” (If not changed the option, the input
menu can differ from the model spec.)
* Refer to Job Expression of each main chassis ass'y
(EBTxxxxxxxx) for Option value
* Before PCB check, you have to change the Tool option,
Area Option and have to AC off/on (Plug out and in)
(If missing this process, set can operate abnormally)
* Never push the IN-STOP key after completing the
function inspection.
Case1 : Software version up
1. After downloading S/W by USB , TV set will reboot
automatically.
2. Push “In-stop” key.
3. Push “Power on” key.
4. Function inspection
5. After function inspection, Push “In-stop” key.
Case2 : Function check at the assembly line
1. When TV set is entering on the assembly line, Push
“In-stop” key at first.
2. Push “Power on” key for turning it on.
→ If you push “Power on” key, TV set will recover
channel information by itself.
3. After function inspection, Push “In-stop” key.
MSPG-925 series
RGB
Model : 60 (1024 X 768@ 60 Hz)
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