LG 34UM61 User manual

CHASSIS :
MODEL : 34UM61
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SERVICE MANUAL
LED MONITOR
SERVICE MANUAL
LM55D
P/NO : MFL70139801(1701 -REV00)
Internal Use Only

- 2 -
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ........................................................................ 3
SPECIFICATION ....................................................................................... 4
TROUBLE SHOOTING GUIDE .............................................................. 25
BLOCK DIAGRAM ................................................................................. 19
20
..................................................................................WEIVDEDOLPXE
DISASSEMBLY ...................................................................................... 21
ADJUSTMENT INSTRUCTION ............................................................... 7
Firmware Upgrade Method ................................................................... 15
CONTENTS
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes

- 3 -
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 usedduring 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 checkon 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 MΩand 5.2 MΩ.
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
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes

- 4 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
SPECIFICATION
1) 34UM59(34UM61)
No
Item
Content
Remark
1
Customer
BRAND
2
User Model Name
34UM59&34UM61
3
Sale region
Refer to Suffix standard
4
Feature
34” Wide LCD MONITOR
5
Chassis Name
LM55D
6
General
Scope
External SW
&Adj.
LEFT, RIGHT, UP, DOWN, CENTER
Function Picture Mode Ratio, ECO(Smart Energy Saving), Six
Color, Audio Volume(Headphone)
7 Power Cord
Length : 1.55±0.05 M
Shape : D-type
Color : Black / White
Weight : 130g
Refer to Suffix
standard and power
cord table
8 Cable
DVI
Length :
Shape :
Color :
Pin :
Do not Support
HDMI
Length : 1.8m / 1.5m
Shape : Detachable Type
Color : Black / White
Pin:19pin
Weight : 100g
Support
Black EAD00926103
White EAD00926140
USB
Length :
Shape :
Color :
Do not Support
Audio
Length :
Shape :
Color:
Do not Support
TV Length : ,Shape : ,Color: ,Pin Do not Support
9
Wall-mount(KR, EU)
EAY62850012
Desktop(except KR, EU)
EAY63190001
EAY62850503
Input: AC100~240V 50~60Hz, 1.1A Max
Output: DC 19V, 2.1A
Adapter(desk-top type)
Weight : 160g
Back cover Input:19V 2.0A
10 Applying module list
P/No Specification
CDMS module
EAT63403001
EAJ63909701 LM340WW1-SJC1
11 Etc (accessory) Manual CD - Support

- 5- LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
2. Signal Timing(Resolution)
2.1 Signal(Video & Sync)
2.1.2 H/V Timing
A
B
C
D
E
F
Video
Sync
mode section polar
ity
DOT
CLOCK
[MHz]
Frequency
[kHz]/[Hz]
Total
Period
(E)
Display
(A)
Front
Porch
(D)
Sync.
(C)
Back
Porch
(B)
Resolution
1
H(Pixels)
-
28.321
31.468
900
720
18
108
54
720 X 400
V(Lines)
+
70.08
449
400
12
2
35
2
H(Pixels)
-
25.175
31.469
800
640
16
96
48
640 x 480
V(Lines)
-
59.94
525
480
10
2
33
3
H(Pixels)
-
31.5
37.5
840
640
16
64
120
640 x 480
V(Lines) - 75 500480 1 3 16
4
H(Pixels)
+
40.0
37.879
1056
800
40
128
88
800 x 600
V(Lines)
+
60.317
628
600
1
4
23
5
H(Pixels)
+
49.5
46.875
1056
800
16
80
160
800 x 600
V(Lines)
+
75.0
625
600
1
3
21
6
H(Pixels)
-
65.0
48.363
1344
1024
24
136
160
1024 x 768
V(Lines)
-
60.0
806
768
3
6
29
7
H(Pixels)
+
78.75
60.123
1312
1024
16
96
176
1024 x 768
V(Lines) + 75.029 800768 1 3 28
8
H(Pixels)
+
108
67.5
1600
1152
64
128
256
1152 x 864
V(Lines)
+
75
900
864
1
3
32
9
H(Pixels)
+
74.25
45
1650
1280
110
40
220
1280x720
V(Lines)
+
60
750
720
5
5
20
10
H(Pixels)
+
108
63.981
1688
1280
48
112
248
1280 x
1024
V(Lines)
+
60.02
1066
1024
1
3
38
11
H(Pixels)
+
135
79.976
1688
1280
16
144
248
1280 x
1024
V(Lines)
+
75.025
1066
1024
1
3
38
12 H(Pixels) + 108.0 60.00 18001600 24 80 96 1600 x 900
V(Lines) + 60.00 1000900 1 3 96
13 H(Pixels) - 146.25 65.29 224016801041762801680 x
1050
V(Lines)
+
59.954
1089
1050
3
6
30
14 H(Pixels) + 148.50 67.50 22001920 88 44 1481920 x
1080
V(Lines)
-
60
1125
1080
4
5
36
15 H(Pixels) - 185.58 66.7 27842560 64 64 96 2560 x
1080
V(Lines)
+
60 11111080 3 10 18
DVI : DTV Mode is not supported (interlace mode)

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Only for training and service purposes
gnimiTIMDH. 3.1.2
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

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Only for training and service purposes
ADJUSTMENT INSTRUCTION
1. Application
1.1 This document is applied to LM55C chassis 34” LCD Monitor which is manufactured in Monitor Factory or is produced on the
basis of this data.
1.2 Manufacturing Type : Set
2. Designation
2.1 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.
2.2. Power Adjustment: Free Voltage ( 100 ~ 240Vac)
2.3. Magnetic Field Condition: Nil.
2.4. Input signal Unit: Product Specification Standard
2.5. Reserve after operation: Above 5 Minutes (Heat Run)
Temperature : at 25℃±5°C
Relative humidity : 65 ±10%
Input voltage : 100 ~ 240V, 50/60Hz
2.6. Adjustment equipments: Color Analyzer (CA-210 or CA-110), DDC Adjustment Jig equipment,
3. Main PCB check process
*APC - After Manual-Insult, executing APC
3.1 ADC Process
1) 34UM59 doesn’t need ADC process because it has only digital input like HDMI.
3.2 EDID Process
3.2.1 EDID Download
F/W includes default EDID for All input ports, aging on Mode If AC ON, default EDID is automatically loaded to EEPROM.
Use HDMI 1 port to download the EDID and gamma adjust WB adjust .
automatically.
3.3 Function Check
3.3.1 Check Screen
■Checkinput and signal items. (cf. work instructions)
1. HDMI1/2 (2560 x 1080 @60Hz)

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Only for training and service purposes
4. Total Assembly line process
4.1 Write HDCP Key
Write HDCP Key into EEPROM by using DDC2AB protocol & HDCP Adjustment Jig equipment.
If error is occurred, try to write again.
After download HDCP key, send command ‘0xE6 00 00’ for loading RAM memory correctly.
4.2 White balance adjustment
4.2.1 Confirm PRESET WARM(6500K) Color coordinates and PRESET COOL(9300K) Color coordinates .
-. Set as Aging mode ON,by commanding AGING_ON/OFF command code.
-. SelectModule that is being used in present production by commanding MODULE SELECT.
-. Send SYSTEM RESET command to set Module data.
-. Input Full White Pattern (Video level : 700 mVp-p)
-. Set as COOL(9300K) by commanding COLOR_MODE_CHANGE Command code.
4.2.2 COOL (9300K) color adjustment
-. If this TCO spec should be satisfied later, refer to below method
-. Adjust to meet x= 0.283 ± 0.004, y=0.298±0.004, and confirm
-. Save 9300K Color by commanding COLOR SAVE Command code
-. Set as 6500K by commanding COLOR_MODE_CHANGE Command code.
4.2.3 WARM(6500K) color adjustment
-. If this TCO spec should be satisfied later, refer to below method
-. Adjust to meet x= 0.313 ± 0.003, y=0.329±0.003, and confirm.
(Option) It’s another method for 6500K color adjustment at GUMI & NT
At first, Check ΔUV. If that is under 0.065, the set is not adjusted
If not, It is adjust to meet u’= 0.198±0.65, v’=0.469±0.65
In case of this model, sRGB Adjustment is not required
4.2.4 Total Assembly line should be check whether the color coordinate(x,y) data refer to below table were meet or not.
Color
Temperature
Cool 9,300k °K X=0.283 (±0.015)
Y=0.298 (±0.015)
<Test Signal>
Inner pattern
(255gray,100IRE)
Warm 6,500k °K X=0.313 (±0.015)
Y=0.329 (±0.015)
Luminance
(cd/㎡)
Cool Min : 150

120
<Test Signal>
Inner pattern
(255gray,100IRE)
Warm Min : 250

200
*Note : x,y coordinates are drifted about 0.007 after 30 mins heat-run. So checking color coordinate within 5-min at total
assembly line, consider x,y coordinates might be up to 0.007 than x,y target of eachcolor temperature. ..
*Note : Manual W/B process

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Only for training and service purposes
1) Power off => Push the Joystick button: LEFT + LEFT + LEFT + RIGHT => Power on(OK)
2) Push the Joystick button and then go to “Menu”.
3) In Service Menu.
4) You can control R/G/B Gain Manually.(at 6,500k & 9,300k)
※W hen doing Adj ustment, Please make circumstance as below.
■Measurement Condition: CA-210 / Ch.: 14 (WLED)
4.3 DPM Operation check
■Measurement Condition: 100~240V@ 50/60Hz
1) Set Input to HDMI1, HDMI2
2) Turn off the source device.
3) Check DPM operation refer to the below table.
Operating Condition
Sync (H/V)
or Video
EUT
(MSPG6100)
LED(SET) Wattage(W)
Sleep mode
Off/Off
Off
White blinking
0.5
Off mode - - Off 0.3

-10 -LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
5. Shipping condition
No. Item Content& Outgoing Condition 비고
1 Outgoing
Condition
SOURCE
HDMI(follows final input)
Power S/W
OFF
Monitor
Block
BRIGHTNESS100
English, Ger
man, French,
Spanish, Ital
ian, Swedish,
Finnish, Por
tuguese, Bra
zil, Polish, Ru
ssian, Greek,
Ukrainian, C
hinese, Japa
nese, Korean
Traditional C
hinese
Ratio Wide
COLOR TEMP
PRESET
PRESETCUSTOM
Black Level Low
(Black level enable at HDMI input)
CONTRAST 70
LANGUAGE Depend on the sale region
FACTORY RESET NO
SESLow
AV
Block
CONTRAST -
N/A
BRIGHTNESS -
SHARPNESS -
COLOR -
TINT -
BASS -
TREBLE -
MUTE
-
LANGUAGE
-
IMAGE SIZE
-
OSD POSITION
-
TRANSPARENCY
-
Operating. Time
Within 2Hours

Make sure to do FACTORY RESET at the final process.(Under HDMI 1 input)

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Only for training and service purposes
6. Signal composition for adjustment
6.1 I2C (100K BPS)
6.2 COMMUNICATION START
#Until ACK BIT goes LOW, Repeat it.
6.3 Command form.
Command form use DDC2AB standard communication protocol.
START 6E A 50 ALEN A03 ACMD A00 A VALACS ASTOP
a. LEN : DATA BYTE number to send.
b. CMD : Command language that monitor executes.
c. VAL : FOS DATA
d. CS : Dada’s CHECHSUM that transmit
e. DELAY : 50MS
f. A : Acknowledge
6.4 Screen adjust command (LENGTH = 84)
No.
Adjustment contents
CMD
(hex)
ADR
VAL(hex)
Explanation
1
EEPROM ALL INITIAL
E4
00
00
adjustment Initialization
2
EEPROM READ
E7
Slave
add
At EEPROM Read
3
EEPROM WRITE
E8
Slave
add
Data
Write data at EEPROM
4
R GAIN
16
00
00-64
Tune Gain
5
G GAIN
18
00
00-64
6
B GAIN
1A
00
00-64
7
BRIGHT(Backlight)
10
00
00-64
Tune Analog Bright
8
FACTORY RESET
F0
00
00
Factory reset
9 COLOR_MODE_
CHANGE F2 00
01
WARM(6500K)
02
COOL(9300K)
10 Elapsed time Clear E9 00 00 Aging off &Clear
elapsed time
11
Aging On/Off
F3
00
FF/00
FF:ON / 00:OFF
12 Input Select F4 00
0xD0
0x90
0x91
1:DisplayPort
2:HDMI1
3:HDMI2
13
SYSTEM RESET
F5
00
00
Restart System
14 Select Language 68 00 0x00 ~
0x0F
00:English,
01: German
02: French
03: Spanish
04: Italian
START
6E
A
STOP
50Ms

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Only for training and service purposes
05: Swedish,
06:Finnish
07: Portuguese
08: Brazil
09: Polish
0A: Russian
0B: Greek
0C: Ukrainian
0D: Chinese
0E:Japanese
0F: Korean
10: Traditional Chinese
15 EDID SN UPDATE 0x77 0 0 0x00: HDMI2
16 Module select 0XF6 0 0x96 34UM59
PB340WW1SJ
17 APD command 0XF7 00 0X00/ 0X01 0X00: OFF
0X01: ON
18 Model Select 0XF9 00 0X01 0X01: UM59
19
Vcom*
Only LGD panel biz models need
Internal Pattern ON A7 00 03 OSD Flicker pattern on
Vcom Adjustment A9 00 Value Range (0x00 ~ 0x7F)
Save Vcom vlaue A8 00 00 Save Vcom value in
EEROM for SVC OSD
Internal Pattern Off A7 00 00 OSD Flicker pattern off
6.5. EEPROM Data Write
6.5.1 Siganl TABLE
LEN :84h+Bytes
CMD :E8h
STOP
A
A
A
A
A
50
6E
03
CMD
ADH
84+n
START
ADL
A
CS
A
A
Data_1
A
. . .
Data_n
A
Delay 20m

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Only for training and service purposes
ADH : E2PROM Slave Address(A0,A2,A4,A6,A8,AA,AC,AE), Not 00h(Reserved by Buffer To EEPROM)
ADL :E2PROM Sub Address(00~FF)
Data :Write data
Delay : 20ms
6.5.2. Command Set
No.
Adjustment contents CMD(hex
)
LEN Explanation
1
EEPROM WRITE
E8
94
16-Byte Write
2
(84+n)
n-byte Write
* Use
FOS Default write :
<14mode data> write
SyncFlags,HPeriodH, HPeriodL, VtotalH,VtotalL, SrcHTotalH, SrcHTotalL
SrcHStartH, SrcHStartL, SrcVStartH,SrcVStartL, HsyncPhase
Temporary Data write: Write to particular address of EEPROM.
6.6 E2PROM Data Read
6.6.1 Signal TABLE
----------------------------------------------------------------------
128 Bytes
6.6.2 COMMAND SET
No. Adjustment contents CMD(hex
)
ADH(hex) ADL(hex) Explanation
1
EEPROM READ
E7
A0
0
0-Page 0~7F Read
2
80
0-Page 80~FF Read
3
A2
0
1-Page 0~7F Read
4
80
1-Page 80~FF Read
5
A4
0
2-Page 0~7F Read
6
80
2-Page 80~FF Read
7
A6
0
3-Page 0~7F Read
8
80
3-Page 80~FF Read
9
A8
0
4-Page 0~7F Read
10
80
4-Page 80~FF Read
STOP
A
A
D1
6F
STOP
START
A
A
A
Dn
A
A
A
50
6E
03
CMD
ADH
84
START
A
A
ADL
A
CS
Delay 150ms

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Only for training and service purposes
11
AA
0
5-Page 0~7F Read
12
80
5-Page 80~FF Read
13
AC
0
6-Page 0~7F Read
14
80
6-Page 80~FF Read
15
AE
0
7-Page 0~7F Read
16
80
7-Page 80~FF Read
6.6.3 Use
Read E2PROM’s specific area as unit of 128(80h)-byte. ( 84h )
6.6.4 EDID Write
EEPROM access by using DDC2AB protocol
1-Byte write
L : 0x00~0x7F
D : data
8-byte write
L : 0x00,0x10,….0x70
6.6.5 EDID Read
DDC2AB Command.(A8)
- 128 Byte transfer of EDID Buffer of MICOM
STOP
STOP
A
A
A
A
A
L
L
A0
A0
….
Data8
D
Data1
START
START
A
STOP
A
00
A0
START
A
A
CS
A
Data1
A1
START
. . .
Data128
A
A

Copyright © 2012 LG Electronics Inc. All rights reserved.
Only for training and service purposes
1 JIG connection
Connect the HDMI cable and USB cable on LG JIG like below picture.
Connect HDMI cable on the monitor and connect USB cable on the PC
2 Execute Realtek ISP Tool
Execute [ RTDtool.Exe] file
Check the Composite Device, USB Serial Converter A(B)] on DEVICE Manager
3 Check USB Driver 4 Install USB Driver
Check Access method as FTDUsb
[ communication option ] ÆDriver [ Install ]

Copyright © 2012 LG Electronics Inc. All rights reserved.
Only for training and service purposes
5 Set Access Method
Select [ FTDI USB] on Access Method
6 Set options
Uncheck the Check ACK checkbox

Copyright © 2012 LG Electronics Inc. All rights reserved.
Only for training and service purposes
7 ISP
Select [ ISP ] Icon
8 set Erase Setting
Click the Tool Icon to enter the ISP option window
Select Erase Setting tab and choose Bank Erase

Copyright © 2012 LG Electronics Inc. All rights reserved.
Only for training and service purposes
9 Load ISP File
Check the checkbox of Bank 0, and then press [… ] button to open the
file window, select the ISP file
10 Do ISP
Click the thunderbolt icon box to do ISP.
After finishing it, you can see [Success] text on the status window

- 19 -
LGE Internal Use Only
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
BLOCK DIAGRAM
120
110
NT68363
Scaler (IC100)
LVDS ( 41pin)
LVDS ( 51pin)
HDMI 1
(JK101)
HDMI 1
(JK102)
Headphone
(JK601)
From Scaler
DC Jack (19V)
LED
(P400)
LED Drvier
(IC 500)
LED Drvier
(IC 500)
LED
(P401)
Control (P200)
Crystal
(X200)
Flash Memory
(IC200)
+1.2V
+2.5V
+3.3V
+5V
+19V
VOCM_I2C

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Only for training and service purposes
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
910
900
920
200
220
700
500
330
201
310
400
540
or
210