LG UltraGear 24GL600F User manual

Internal Use Only
CHASSIS : LM91A
MODEL :24GL600F/24GN50W
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SERVICE MANUAL
LED MONITOR
SERVICE MANUAL
P/NO :MFL69406855(2003-REV01)

- 2 -
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ........................................................................ 3
SPECIFICATION ....................................................................................... 4
Firmware Upgrade Method ............................................................... 8
TROUBLE SHOOTING GUIDE .............................................................. 11
BLOCK DIAGRAM ................................................................................. 15
EXPLODED VIEW .................................................................................. 16
DISASSEMBLY ...................................................................................... 17
CONTENTS

- 3 -
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the
Schematic Diagram and Exploded View.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1 W), keep the resistor 10 mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1 Mȍand 5.2 Mȍ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5 mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
IMPORTANT SAFETY NOTICE
To Instrument's
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
SAFETY PRECAUTIONS

SPECIFICATION
-4 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
No
Item
Content
Measurement
Result
Remark
1
Customer
BRAND
Checked
OK
2
User Model Name
24GL600F/24GN50W
Checked
OK
3
Sale region
Worldwide
Checked
OK
4
Feature
24” LCD MONITOR(gaming)
Checked
OK
5
Chassis Name
LM91A
Checked
OK
6
General
Scope
External SW
& Adj.
5-way joystick switch
Checked
OK
Function
Game Mode, Aspect Ratio, S.E.S, Six
Color, On Screen Control, Dual
Controller, Gamma calibration
Checked
OK
7
Power Cord
Length : 1.00±0.04 M / Shape : Wall-out
/ Color : Black
Weight : 0.13kg ±10%
Checked
OK
1.01m, 0.131kg
Power cord can be changed
according to region.
(For D/T type adapter)
8
Cable
HDMI
Length : 1.5m±0.05m / Shape :
Detachable Type / Color : Black /
Weight : 0.091kg±10%
Checked
OK
1.5m, 0.095kg
100 Ω± 10%
SET accessory
P/N : EAD63954401
CABLE : 100Ω±10Ω
CONNECTOR : 100Ω±15Ω

-5 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
DisplayPort
Length : 1.5m±0.05m
Shape : Detachable Type / Color : Black
/ Weight : 0.095kg±10%
N/A
N/A
CABLE : 100Ω±5Ω
CONNECTOR : 100Ω±10Ω
N/A
N/A
9
Power
Output: DC 19V 2.1A, 40W Adapter
Color: Black, Weight : 205g ±10%,
without vinyl bag
Checked
OK
P/N : Refer to suffix standard.
10
Factory calibration report
0.002kg
Checked
OK
SET accessory / Refer to BOM
11
Applying module list
P/No
Specification
EAJ64809601/2
MT236FHM-N10
(BOE)
Checked
OK

2. Signal Timing (Resolution)
2.1. Signal (Video & Sync)
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A
B
C
DEF
Video
Sync
.
-6 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
mode
section
polarity
DOT
CLOCK
[MHz]
Frequency
[kHz]/[Hz]
Total
Period
(E)
Display
(A)
Front
Porch
(D)
Sync.
(C)
Back
Porch(B)
Resolution
(HDMI / DP)
1
H(Pixels)
+
48.75
31.469
800
640
16
96
48
640 x 480
V(Lines)
-
59.94
525
480
10
2
33
2
H(Pixels)
+
73.25
76.302
960
800
48
32
80
800 x 600
V(Lines)
-
120
636
600
3
4
29
3
H(Pixels)
+
115.50
97.551
1184
1024
48
32
80
1024 x 768
V(Lines)
-
120
813
768
3
4
38
4
H(Pixels)
+
91.00
63.194
1440
1280
48
32
80
1280 x1024
V(Lines)
-
59.96
1054
1024
3
7
20
5
H(Pixels)
+
187.25
130.035
1440
1280
48
32
80
1280 x1024
V(Lines)
-
119.96
1084
1024
3
7
50
6
H(Pixels)
+
285.50
137.26
2080
1920
48
32
80
1920 x 1080
V(Lines)
-
119.98
1144
1080
3
5
56
71
H(Pixels)
+
148.50
67.50
2200
1920
88
44
148
1920 x 1080
V(Lines)
+
60
1125
1080
4
5
36
8
H(Pixels)
+
185.60
84.36
2200
1920
88
44
148
1920 x 1080
V(Lines)
+
74.99
1125
1080
4
5
36
9
H(Pixels)
-
235.5
113.22
2080
1920
48
32
80
1920 x 1080
V(Lines)
-
99.93
1133
1080
3
5
45
10
H(Pixels)
+
325.08
158.11
2056
1920
24
32
80
1920 x 1080
V(Lines)
-
144.00
1098
1080
3
5
10

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3HDMI Video input(Refer to Manual)
-7 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Factory support
mode
Horizontal
frequency
Vertical
frequency
(Preset Mode)
(KHz)
(Hz)
1
480P
31.5
60
2
576P
31.25
50
3
720P
37.5
50
4
720P
45
60
5
1080P
56.25
50
6
1080P
67.5
60
7
1080P
112.5
100
8
1080P
135
120

How to download monitor Firmware
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▶M-star JIG Connection
1. Connect M-star Jig to monitor and PC.
2. Unzip the driver file below and then install it depending on Windows OS.
3. Reboot the PC after completed the installation.
MstarDebugTool_Driver_Win7.zip
To PC USB port
To monitor HDMI
port To PC USB port
To monitor HDMI
port
Mstar JIG LG common
JIG
Copyright © 2012 LG Electronics Inc. All rights reserved.
Only for training and service purposes

How to download monitor Firmware
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▶F/W Update Instruction
1. Connect HDMI cable and select “Connect” button.
2. Select “Read” button(1st) and find bin file(2nd) and then check the checksum value(3th).
1 1)
2)
3)

How to download monitor Firmware
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3. Select “Auto” button(1st) and confirm the checkbox settings(2nd) and then select “Run” button(3th).
*Please make sure that “File Area” option is selected.
4. After ISP is completed, do factory reset in the OSD main menu.

8.a. Trouble shooting Guide : No Power
Copyright © 2012 LG Electronics Inc. All rights reserved.
Only for training and service purposes

8.b. Trouble shooting Guide : No Screen on
Copyright © 2012 LG Electronics Inc. All rights reserved.
Only for training and service purposes

8.c. Trouble shooting Guide : No video –HDMI
Copyright © 2012 LG Electronics Inc. All rights reserved.
Only for training and service purposes

Copyright © 2012 LG Electronics Inc. All rights reserved.
Only for training and service purposes
8.c. Trouble shooting Guide: No video –DP

BLOCK DIAGRAM
160
141.5
LVDS ( 51pin)
Headphone
(JK500)
HDMI 2
(JK101)
DP Input
(JK102)
LED Driver
(IC 700)
EEPROM
(IC201)
Flash Memory
(IC202)
MST9U17Q1
Scaler (IC200)
LED
(P700)
From Scaler
HP AMP
(IC500)
Control
(P1)
LVDS
( 41pin)
1. PCB P/N : EAX68305001 (1.1)
2. PCB Size : 160 x 141.5 mm
3. PCB Layer : 4 Layer (1.6T)
DC Jack (19V)
HDMI switch
(IC101)
HDMI 1
(JK100)

EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts
are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as recommended
in this manual to prevent Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
200 400
300
500 510
330
900
910
920
520
930
540
or

SVC Disassembly guidance
1. Put on the Pad
2. Use a screw –driver to disassembly the Stand-base screw(1ea)
3. Disassembly the Stand-base.
4. Disassembly the Screw-cover

5. Disassembly the Stand-body screw (2ea)
6. Disassembly the Stand-Body shaking left and right.
7. Disassembly the Jack screw (1ea)
8. Use a jig to disassembly the Back cover.
9. Disassembly the Control PCB assy toward Arrow direction.

11. Disassembly the Metal Hinge assy and DMS assy
12. Disassembly the PCB Screw (2ea)
13. Pull out the PCB from Mainframe(Press).
14. Pull out the Module from Cabinet