LG 32UK50TW User manual

Internal Use Only
P/NO :
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SERVICE MANUAL
MFL62449365(1809-REV00)
32UK50T
LM71F
LED LCD MONITOR

- 2 - Copyright © 2018 LG Electronics Inc. All rights reserved.
Only training and service purposes
CONTENTS
CONTENTS................................................................................................................................................................................................................................................................... - 2 -
SAFETY PRECAUTIONS......................................................................................................................................................................................................................................... - 3 -
SPECIFICATION ......................................................................................................................................................................................................................................................... - 4 -
ADJUSTMENT INSTRUCTION......................................................................................................................................................................................................................... - 14 -
BLOCK DIAGRAM .................................................................................................................................................................................................................................................. - 21 -
EXPLODED VIEW................................................................................................................................................................................................................................................... - 22 -
TROUBLE SHOOTING GUIDE........................................................................................................................................................................................................................... - 26 -

SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by△
！in the
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 modif
y
the ori
g
inal desi
g
n without
p
ermission of manufacturer.
IMPORTANT SAFETY NOTICE
General Guidance An other abnormality exists that must be corrected before the
An isolation Transformer should always be used during the receiver is returned to the customer.
servicing of a receiver whose chassis is not isolated from the AC
Leakage Current Hot Check (See below Figure)
power line. Use a transformer of adequate power rating as this
Plug the AC cord directly into the AC outlet.protects the technician from accidents resulting in personal injury
from electrical shocks.
Do not use a line Isolation Transformer during this check.
Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitorIt will also protect the receiver and it's components from being
between a known good earth ground (Water Pipe, Conduit, etc.)damaged by accidental shorts of the circuitry that may be
and the exposed metallic parts.inadvertently introduced during the service operation.
Measure the AC voltage across the resistor using AC voltmeterIf any fuse (or Fusible Resistor) in this TV receiver is blown,
with 1000 ohms/volt or more sensitivity.replace it with the specified.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltageWhen replacing a high wattage resistor (Oxide Metal Film Resistor,
measured must not exceed 0.75 volt RMS which is corresponds toover 1 W), keep the resistor 10 mm away from PCB.
0.5 mA.Keep wires away from high voltage or high temperature parts.
In case any measurement is out of the limits specified, there is
Before returning the receiver to the customer, possibility of shock hazard and the set must be checked and
always perform an AC leakage current check on the exposed repaired before it is returned to the customer.
metallic parts of the cabinet, such as antennas, terminals, etc., to
Leakage Current Hot Check circuit
be sure the set is safe to operate without damage of electrical
shock.
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Only training and service purposes
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. When 25A is impressed between Earth and 2nd Ground
If the exposed metallic part has a return path to the chassis, the for 1 second, Resistance must be less than 0.1
*Base on Adjustment standard
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.

SPECIFICATION
1. General Specification
2. ** Provided accessory: #7/#8/#9/#10/#11/#12/#13
No Item Content Remark
1 Customer BRAND
2 User Model Name 32UK50T
3 Sale region Worldwide
4 Feature 31.5” LCD MONITOR(UHD)
5 Chassis Name LM71F
6 General
Scope
External SW
& Adj.
5-way joystick switch
Function Picture Mode, Ratio, S.E.S, Six Color, On Screen Control, Dual Controller
Gamma calibration
7 Power Cord Length : 1.55±0.05 M / Shape : Wall-out / Color : Black
Weight : 0.16kg ±10%
Power cord can be changed
according to region.
Cable
HDMI
Length : 1.5m±0.05m / Shape : Detachable Type / Color : Black / Weight : 0.091kg±10%
SET accessory
P/N : EAD63954401
CABLE : 100Ω±10Ω
CONNECTOR : 100Ω±15Ω
DisplayPort
Length : 1.5m±0.05m
Shape : Detachable Type / Color : Black / Weight : 0.095kg±10% SET accessory
P/N : EAD63749401
CABLE : 100Ω±5Ω
CONNECTOR : 100Ω±10Ω
9 Power Output: DC 19V 3.42A, 65W Adapter
Color: Black, Weight : 0.58kg ±10%, without vinyl bag P/N : EAY62990906
10 Factory calibration report 0.002kg SET accessory / Refer to BOM
11 Applying module list P/No Specification
EAJ64127601 M315DJJ-K30
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Only training and service purposes

2.Signal Timing (Resolution)
1< Signal (Video & Sync) >– Displ ayPort
Mode section polarity DOT CLOCK[MHz] Frequency
[kHz]/[Hz]
Total
Period(E)
Display
(A)
Front
Porch(D)
Sync.
(C)
Back
Porch(B) Resolution
1
H(Pixels) -
25.175
31.469 800 640 16 96 48
640 x 480
V(Lines) - 59.94 525 480 10 2 33
2
H(Pixels) +
40
37.879 1056 800 40 128 88
800 x 600
V(Lines) + 60.317 628 600 1 4 23
3
H(Pixels) -
65
48.363 1344 1024 24 136 160
1024 x 768
V(Lines) - 60 806 768 3 6 29
4
H(Pixels) +
79.99
54.347 1472 1152 32 96 192
1152 x 864
V(Lines) + 60.05 905 864 1 3 37
5
H(Pixels) +
74.250
45.00 1650 1280 110 40 220
1280 x 720
V(Lines) + 60.00 750 720 5 5 20
6
H(Pixels) +
108
63.981 1688 1280 48 112 248
1280 x 1024
V(Lines) + 60.02 1066 1024 1 3 38
7
H(Pixels) +
108.00
60.00 1800 1600 24 80 96
1600 x 900
V(Lines) + 60.00 1000 900 1 3 96
8
H(Pixels) +
148.5
67.5 2200 1920 88 44 148
1920 x 1080
V(Lines) - 60 1125 1080 4 5 36
9
H(Pixels) +
241.50
88.79 2720 2560 48 32 80
2560 x 1440
V(Lines) - 59.95 1481 1440 3 5 33
10
H(Pixels) +
266.64
66.66 4000 3840 8 144 8
3840 x 2160
V(Lines) - 30 2222 2160 54 5 3
111)
H(Pixels) +
533
133.32 4000 3840 8 144 8
3840 x 2160
V(Lines) - 60 2222 2160 54 5 3
Main Recommended Timing
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Only training and service purposes

< HDMI>
Mode section polarity DOT CLOCK[MHz] Frequency
[kHz]/[Hz]
Total
Period(E)
Display
(A)
Front
Porch(D)
Sync.
(C)
Back
Porch(B) Resolution
1
H(Pixels) -
25.175
31.469 800 640 16 96 48
640 x 480
V(Lines) - 59.94 525 480 10 2 33
2
H(Pixels) +
40
37.879 1056 800 40 128 88
800 x 600
V(Lines) + 60.317 628 600 1 4 23
3
H(Pixels) -
65
48.363 1344 1024 24 136 160
1024 x 768
V(Lines) - 60 806 768 3 6 29
4
H(Pixels) +
79.99
54.347 1472 1152 32 96 192
1152 x 864
V(Lines) + 60.05 905 864 1 3 37
5
H(Pixels) +
74.250
45.00 1650 1280 110 40 220
1280 x 720
V(Lines) + 60.00 750 720 5 5 20
6
H(Pixels) +
108
63.981 1688 1280 48 112 248
1280 x 1024
V(Lines) + 60.02 1066 1024 1 3 38
7
H(Pixels) +
108.00
60.00 1800 1600 24 80 96
1600 x 900
V(Lines) + 60.00 1000 900 1 3 96
8
H(Pixels) +
148.5
67.5 2200 1920 88 44 148
1920 x 1080
V(Lines) - 60 1125 1080 4 5 36
9
H(Pixels) +
241.50
88.79 2720 2560 48 32 80
2560 x 1440
V(Lines) - 59.95 1481 1440 3 5 33
10
H(Pixels) +
297
67.5 4400 3840 176 88 296
3840 x 2160
V(Lines) - 30 2250 2160 8 10 72
111)
H(Pixels) +
594
135 4400 3840 176 88 296
3840 x 2160
V(Lines) - 60 2250 2160 8 10 72
6.1.2 HDMI Video input
Factory support
mode
Horizontal
frequency
Vertical
frequency
(Preset Mode) (KHz) (Hz)
1 480P 31.5 60
2 720P 45 60
3 1080P 67.5 60
4 2160P 135 60
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6.1.3 Supporting timing
EDID 2Page 영역의 Video Short Block Description
수평
크기
수직
크기
주사방식 주파수 비율 HDMI 1.4 HDMI 2.0
HDMI FreeSync
DP
DP FreeSync
640 480 P 59.94/60 4:3 ●●●
720 480 P 59.94/60 4:3 ●
720 480 P 59.94/60 16:9 ●●●
1280 720 P 59.94/60 16:9 ●●●
1920 1080 I 59.94/60 16:9 ●●
1920 1080 P 23.98/24 16:9 ●
1920 1080 P 29.97/30 16:9
●●
1920 1080 P 59.94/60 16:9
●●●
3840 2160 P 23.98/24 16:9 ●
3840 2160 P 25 16:9 ●
3840 2160 P 29.97/30 16:9 ●
3840 2160 P 50 16:9 ●
3840 2160 P 59.94/60 16:9 ●
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Only training and service purposes

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Only training and service purposes
3. LCD Panel Characteristic
No Item Content Remark
1 LCD Module
Feature
Maker INX
Type VA
Active Display Area 31.5 inches(80.0051cm) (Aspect ratio 16:9)
Pixel Pitch [mm] 0.0603 [mm]X RGB X 0.18159 [mm]
Electrical Interface V by 1
Color Depth 1.073 Billion colors
Size (Outline) [mm] 717.4(H)x413.85(V)x17.9(D)mm (Typ.)
Surface Treatment AG type, 3H hard coating, Haze 25
Operating Mode Transmissive mode, normally Black
Back light Unit White LED
Color Gamut DCI-P3 95%
Standard Measurement Condition
zAmbient Luminance Level : dark ( < 10 lux)
zAmbient Temperature : Normal Temperature(10 ~ 25 ℃)
zwarm-up Time : More than 30min (at Full White Pattern)
zInput Signal : 3840X2160@60Hz
zContrast : 70 / Brightness : Max. 100
z6500K : Color Temperature Setting is 6500 K( if it’s not special specification)
zAnother Spec.: Product Specification Standard( LG(55)G1-1034 )
zCosmetic Spec. : LCD Module IIS Spec.

4.EDID
2.1 Single EDID Information
No Item Content 16진Data
1 Manufacturer ID GSM 1E 6D
2 Product ID HDMI1/2 : 23304
DP : 23305
5B 08
5B 09
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3 Year/Week Year :19 (2015)
Week : 1(1주차)
19 / 1
Inserted at Production Line
5 Version/Revision HDMI : 01 03
DP : 01 04
HDMI : 01 03
DP : 01 04
6 Serial Number Refer to variable data file Refer to variable data file
Inserted at Production Line
8 Model Name LG Ultra HD -
9 Check Sum Refer to variable data file Refer to variable data file
1) GSM : Vendor Name which was registered in VESA
2) Fixed Vaule : Manufacturer ID, Model Name
3) Adjustable Value : Serial Number, Year/Week(Inserted at Production Line), Revision, Physical Address(Different from DP/HDMI1, H
DMI2)
2.1.1.1 HDMI1 EDID (HDMI1.4)
1)PhysicalAddress:HDMI1=10

2.1.1.2 HDMI2 EDID (HDMI1.4
Physical Address : HDMI2=20
2.1.1.3HDMI1EDID(HDMI2.0)
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Only training and service purposes
1)PhysicalAddress:HDMI1=10

2.1.1.4 HDMI2 EDID (HDMI2.0)
Physical Address : HDMI2=20
2.1.1.5 HDMI EDID of FREE-SYNC ON ÆExtended mode
Physical Address : HDMI1=10
Physical Address : HDMI2=20
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Only training and service purposes

2.1.1.6 HDMI EDID of FREE-SYNC ON ÆBasic mode
Physical Address : HDMI1=10
Physical Address : HDMI2=20
2.1.2 DP EDID (DP1.2)
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Only training and service purposes

2.1.3.1 DP EDID of FREE-SYNC ON ÆExtended mode
2.1.3.1 DP EDID of FREE-SYNC ON ÆBasic mode
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Only training and service purposes
ADJUSTMENT INSTRUCTION
1. Application
1.1 This document is applied to LM71F chassis 32UD59/32UK50T 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
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, UA-10), DDC Adjustment Jig equipment,
3. Main PCB check process
* APC - After Manual-Insult, executing APC
3.1 ADC Process
- UD59 doesn’t need ADC process because it has only digital input like DisplayPort, HDMI.
3.2 Main PCB Function test
- Check display/audio according to interface
4. Total Assembly line process
4.1 Write HDCP 1.4 / 2.2Key
-. HDCP 1.4 KEY
a. HDCP 1.4 KEY is included in Scaler. Don’t need write HDCP 1.4 key.

-. HDCP 2.2 KEY (Refer to 27MU67/27UD68/27UD88/27UD58/24UD58/32UD89 Writing process)
a. Write HDCP Key into EEPROM by using DDC2AB protocol & HDCP Adjustment Jig equipment.
If error is occurred, try to write again.
b. Write HDCP2.2 Key with IIC protocol.
c. Verification method :
Check OSD with aging on mode or using Master Signal generator with HDCP On and connect to monitor with HDMI
4.2 White balance check and Factory calibration
-. Before the factory calibration, check the White balance according to below specification.
HDMI 1920x1080( or 3840x2160), Full White
Tolerance : -/+0.015 / Luminance Spec(min) : 250
Check condition : custom mode(out-going condition)
Aging Time [min] x y
2 0.319 0.339
4 0.318 0.338
8 0.318 0.337
10 0.317 0.336
25 0.316 0.333
40 0.315 0.331
255 0.313 0.329
a. Factory Calibration(2.2) : Gamma, dE, Color Temperature(6500k)
- Reference Model: 27MU67/27UD68/27UD88/27UD58/27UD88/32UD89
- Input: HDMI1/2 , Gray Pattern with Gamma correction using command using “Adjustment Command”
- This model must be calibrated Gamma2.2
Gamma calibration and verify
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Only training and service purposes

*Note: Manual W/B process
1) When in DC OFF Condition
2) Press power button 3 times to left direction.
3) Press power button once to right direction.
4) DC on
5) Press power button up to show Navigation OSD.
6) Press power button left to show Service Menu. (Select “Menu” in Navigation OSD)
※When doing Adjustment, Please make circumstance as below.
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Only training and service purposes

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Only training and service purposes
4.3 DPM Operation check
■Measurement Condition: 100~240V@ 50/60Hz
1) Set Input to DisplayPort, 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 0.5W
Off mode - - Off 0.3W DC Switch Off
5. Shipping condition
ÆMake sure to do FACTORY RESET at the final process.
No. Item Content& Outgoing Condition
비고
Accessory Refer to BOM / And General
specification(3page)
Full accessory list is
included in general
specification
2 Outgoing
Condition
Quick
Settings
Brightness 100
Contrast 70
Volume 30
Input HDMI1
Ratio Full Wide
Picture
Picture Mode Custom
Picture Adjust
Brightness 100
Contrast 70
Sharpness 50
Super Resolution+ Off
Black Level
Depending on input
signal
High (RGB format)
Low (YUV format)
HDMI ULTRAHD Deep Color Off
DFC Off
Game Adjust
Response Time Normal
FreeSync Off
Black Stabilizer 50
Color Adjust
Gamma Mode 2
Color Temp Custom
Red 50
Green 50
Blue 50

Six Color
(Red Hue/ Saturation
Green Hue / Saturation
Blue Hue / Saturation
Cyan Hue / Saturation)
Magenta Hue / Saturation
Yellow Hue / Saturation
50
Picture Reset Yes/No No
General
Language Depend on the sale region
Smart Energy Saving Low
Power LED Off
Automatic Standby Off(EU/EK/PD/EW/MA,4H)
DP 1.2 Enable
OSD Lock Off
OSD Size Small Small
Reset Yes/No No
TRANSPARENCY
Operating. Time Within 2Hours
6. Signal composition for adjustment
6.1 I2C (100K BPS)
6.2 COMMUNICATION START
START 6E A STOP 50Ms
#Until ACK BIT goes LOW, Repeat it.
6.3 Command form.
Command form use DDC2AB standard communication protocol.
START 6E A 50 A LEN A 03 A CMD A 00 A VAL A CS A STOP
a.LEN :DATABYTEnumbertosend.
b. CMD : Command language that monitor executes.
c.VAL: FOSDATA
d.CS :Dada’sCHECHSUMthattransmit
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
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Only training and service purposes

7 BRIGHT(Backlight) 10 00 00-64 Tune Analog Bright
8 FACTORY RESET F0 00 00 Factory reset
9 AUTO_COLOR_ADJUST F1 00 0 AUTO COLOR Tuning
0:Auto color
10 COLOR_MODE_CHANGE F2 00
01 6500K
02 9300K
11 Elapsed time Clear E9 00 00 Aging off &Clear elapsed time
12 Aging On/Off F3 00 FF/00 FF:ON / 00:OFF
13 Input Select F4 00
0xD0
0x90
0x91
1:DisplayPort
2:HDMI1
3:HDMI2
14 SYSTEM RESET F5 00 00 Restart System
15 Select Language 68 00 0x00 ~ 0x0F
00:English,
01: German
02: French
03: Spanish
04: Italian
05: Swedish,
06:Finnish
07: Portuguese
08: Brazil
09: Polish
0A: Russian
0B: Greek
0C: Ukrainian
0D: Chinese
0E:Japanese
0F: Korean
11: Traditional Chinese
EDID SN UPDATE 0x77 0 0x01~0x02
0x01 : HDMI1
0x02 : HDMI2
Module selection M315DJJK30
6.5. EEPROM Data Write
6.5.1 Siganl TABLE
START
6E
A
50
A
84
+
n
A
03
A
CMD
A
ADH
A
A
ADL
Data 1
A
...
Data n
A
CS
A
STOP D
e
l
ay
2
0
m
LEN : 84h+Bytes
CMD : E8h
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
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Only training and service purposes

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
STOP
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Only training and service purposes
START
6E
A
50
A
84
A
03
A
CMD
A
ADH
A
ADL
A
CS
A
Delay 150ms
STOP
----------------------------------------------------------------------
START
6F
A
D1
A
Dn
A
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
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 DDC2B protocol
1-Byte write
START A
0
A L D
STOP
A A
L : 0x00~0x7F
D: data
8-byte write
START A
0
A L A D
ata
A
…
.
A A
Data8
STOP
L : 0x00,0x10,….0x70
6.6.5 EDID Read
DDC2B Command.(A0/A1)
START A0 A 00 START A1 AData1 . . . Data128 A CS A
STOP
- 128 Byte transfer of EDID Buffer of MICOM