LG HU80KA User manual

P/NO : MFL70619902 (1803-REV00)
CHASSIS : FZ82A
MODEL : HU80KA HU80KA-NA
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
DLP PROJECTOR
SERVICE MANUAL
Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
CONFIDENTIAL
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you
have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual.
The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service
Manual.

- 2 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ........................................................................ 3
SPECIFICATION ...................................................................................... 4
BLOCK DIAGRAM ................................................................................... 7
EXPLODED VIEW .................................................................................... 8
DISASSEMBLY GUIDE ............................................................................ 9
ASSEMBLY GUIDE ................................................................................ 10
TROUBLE SHOOTING GUIDE .............................................................. 11

- 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
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 PROJECTOR 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 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
SAFETY PRECAUTIONS

- 4 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
1. Application range
This spec sheet is applied all of the DLP Projector with FZ82A
chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
(1) Temperature: 25 °C ± 5 °C, CST: 40 °C ± 2 °C
(2) Relative Humidity: 65 % ± 10 %
(3) Power Voltage
: Standard input voltage (100~240V @ 50/60Hz)
* 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 30 minutes prior
to the adjustment
3. Test method
(1) Performance: LGE PROJECTOR test method followed
(2) Required other specification
-Safety : KCC, IEC, CE specification (EN55022 Class B),
CCC.
-EMC : KCC, IEC, CE specification (EN60950-1), CCC.
4. Model General Specification
No Item Specication Remark
1Video input applicable
system
ATSC /NTSC M/ ATSC 3.0 HU80KA-KR(Korea)
ATSC /NTSCM/64&256QAM HU80KA-NA(US)
2 Available channel
1) VHF : 02~13 (HU80KA-KR/NA)
2) UHF : 14~69 (HU80KA-KR/NA)
3) DTV : 02-69 (HU80KA-KR/NA)
4) CATV : 01~158 (HU80KA-KR)
CATV : 01~135 (HU80KA-NA)
5) CADTV : 01~158 (HU80KA-KR)
CADTV : 01~135 (HU80KA-NA)
6) UHDTV: 02~56 (HU80KA-KR)
7) UHD CATV: 01~158 (HU80KA-KR)
HU80KA-KR( Korea)
HU80KA-NA(US)
3 Power 250W Set only
4 Input Voltage AC 100 ~ 240(±10%)V, 50/ 60Hz
5 Market
Korea HU80KA-KR
Global HU80KG-GL
US HU80KA-NA
EU HU80KSW-EU
CHINA HU80KG-CH
JAPAN HU80KS-JP
6 Picture size 4K (3840 x 2160) With 4way Actuator
(native: 1920x1080)
7 Aspect ratio 16:9 Panel Resolution
8Operating Temperature 0 40 Deg
9 Operating Humidity 80 %
10 Storage Temperature -20 60 Deg
11 Storage Humidity 85 %

- 5 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
5. Supported video resolutions
5.1. 2D MODE
5.1.1. HDMI Input (DTV mode)
No Resolution H-freq(kHz) V-freq(Hz) Pixel clock
(MHz) Proposed Remarks
1 640*480 31.46 59.94 25.12 SDTV 480P
2 640*480 31.5 60.00 25.12 SDTV 480P
3 720*480 15.73 59.94 13.50 SDTV, DVD 480I(525I)
Spec. out but
display
4 720*480 15.75 60.00 13.51 SDTV, DVD 480I(525I)
5 720*576 15.62 50.00 13.50 SDTV, DVD 576I(625I)
50Hz
6 720*480 31.47 59.94 27 SDTV 480P
7 720*480 31.5 60.00 27.02 SDTV 480P
8 720*576 31.25 50.00 27 SDTV 576P
9 1280*720 44.96 59.94 74.17 HDTV 720P
10 1280*720 45 60.00 74.25 HDTV 720P
11 1280*720 37.5 50.00 74.25 HDTV 720P
12 1920*1080i 28.12 50.00 74.25 HDTV 1080I
13 1920*1080i 33.72 59.94 74.17 HDTV 1080I
14 1920*1080i 33.75 60.00 74.25 HDTV 1080I
15 1920*1080p 26.97 23.97 63.29 HDTV 1080P
16 1920*1080p 27.00 24.00 63.36 HDTV 1080P
17 1920*1080p 33.71 29.97 79.120 HDTV 1080P
18 1920*1080p 33.75 30.00 79.20 HDTV 1080P
19 1920*1080p 56.25 50.00 148.5 HDTV 1080P
20 1920*1080p 67.43 59.94 148.35 HDTV 1080P
21 1920*1080p 67.5 60.00 148.50 HDTV 1080P
22 1920*1080p 112.5 100 297.00 UDTV 1080P
23 1920*1080p 134.86 119.88 296.70 UDTV 1080P
24 1920*1080p 135.00 120 297 UDTV 1080P
25 3840*2160p 53.95 23.98 296.70 UDTV 2160P
26 3840*2160p 54 24.00 297.00 UDTV 2160P
27 3840*2160p 56.25 25.00 297.00 UDTV 2160P
28 3840*2160p 61.43 29.97 296.70 UDTV 2160P
29 3840*2160p 67.5 30.00 297.00 UDTV 2160P
30 3840*2160p 112.5 50.00 594 UDTV 2160P
31 3840*2160p 134.86 59.94 593.40 UDTV 2160P
32 3840*2160p 135 60.00 594 UDTV 2160P
33 4096*2160p 53.95 23.98 296.70 UDTV 2160P
34 4096*2160p 54 24.00 297 UDTV 2160P
35 4096*2160 56.25 25.00 297 UDTV 2160P
36 4096*2160 61.43 29.97 296.70 UDTV 2160P
37 4096*2160 67.5 30.00 297 UDTV 2160P
38 4096*2160 112.5 50.00 594 UDTV 2160P
39 4096*2160 134.86 59.94 593.40 UDTV 2160P
40 4096*2160 135 60.00 594 UDTV 2160P

- 6 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
5.1.2. HDMI Input (PC mode)
No Resolution H-freq(kHz) V-freq(Hz) Pixel clock
(MHz) Proposed Remarks
1 640*350 31.46 70.09 25.17 EGA
2 720*400 31.46 70.08 28.32 DOS
3 640*480 31.46 59.94 25.17 VESA(VGA)
4 800*600 37.87 60.31 40 VESA(SVGA)
5 1024*768 48.36 60.00 65 VESA(XGA)
6 1360*768 47.71 60.01 84.75 VESA(WXGA)
7 1152*864 54.34 60.05 80 VESA
8 1280*1024 63.98 60.02 109.00 SXGA Support to HDMI-PC
9 1920*1080 67.5 60 158.40 WUXGA
(Reduced Blanking)
10 1920*1080 135 120 297 UDTV 1080P
11 3840*2160 54 24.00 297.00 UDTV 2160P
12 3840*2160 56.25 25.00 297.00 UDTV 2160P
13 3840*2160 67.5 30.00 297.00 UDTV 2160P
14 4096*2160 53.95 23.97 296.70 UDTV 2160P
15 4096*2160 54 24 297 UDTV 2160P

- 7 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
BLOCK DIAGRAM
DMD 0.47”, S316
(1920x1080)
4 Way XPR => 3840 x 2160
DDR3
1Gbx4
DLPA100
(PMD1000)
M16+
Headphone
7W
7W
LD Driver 2CH
- RT8482
LD 2ch: 25V 3.0 A * 2
PSU
290W DC 19V
2xLVDS
2xLVDS
2x30 bit
2x30 bit
Actuator Driver
CWI
Index
Vx1
Vx1
(960+32)x1080@240Hz
(960+32)x1080@240Hz
FPGA
1080P
@240
Hz
DLPC6421
Master
DLPC6421
Slave
Field, H/V Sync, DE, CLK
R/G/B/Y-PWM
4 Way Actuator
DDR3
4Gbx4
eMMC
5.01
HDMI
USB 2.0
TDJS-H501F
ATSC3.0
S/P
DIF
Audio
AMP
DTA2010M
Micom
R5F100
HP AMP
TPA6138A2
USB 3.0
LAN
TUNER
* KR/NA Only
WiFi/BT
Combo
Temp
NTC*3
Auto
Keystone
BMA255*2
FAN *3
Cord reel
Speaker
DC
12V
FAN
PWR
EEPROM
Nor Flash
32MB
NOR
Flash
32MB
Serial
Flash
128MB
TDJS_H651F
S/PDIF

- 8 - Copyright © LG Electronics. Inc. All rights reserved.
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 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
AR2
300
531
530
532
120
310
900
305
500
100
110
600
121
560
540
400
710
515
535
920
700
100
750
760
150
160 170
550
501
590
580

- 9 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
DISASSEMBLY GUIDE
ScrewHook
1. Bottom case assy, Jack cover
- Φ3 X L12 4EA screw remove
2. Rear case, Cord cover
- M4x7 screw 4EA remove, sliding remove
3. handle from handle hinge
- M3 X 6 screw 1ea remove
4. handle pin , handle, mirror assy
- Φ3 X L12 screw 6ea remove
5. Top case from frame assy
- Φ2.6 X L8 screw 2ea remove
6. Front case from frame assy
- Φ3 X L12 screw 4ea remove
7. Fan, Wi-Fi, fan from frame assy
8. Main PCB, ceiling BKT from frame assy
- Φ3 X L12 screw 6ea assemble
9.Engine Assy from frame assy
- Φ3 X L12 screw 4ea assemble
10. cord reel, reel housing, Engine shield
, LD Board , cord reel, reel housing
11. handle hinge from frame
- Φ3 X L12 Screw 2ea assemble
12. PSU , PSU shield from frame
- Φ3 X L12 Screw 6ea assemble

- 10 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
ASSEMBLY GUIDE
Screw
1. Frame + PSU + PSU shield
- Φ3 X L12 Screw 6ea assemble
2. Frame + handle hinge
- Φ3 X L12 Screw 2ea assemble
3. Engine shield , LD Board ,Engine Assy
cord reel, reel housing
- Φ3 X L12 screw 4ea assemble
4. Main PCB, ceiling BKT
- Φ3 X L12 screw 6ea assemble
7. Top case+ control Assy
- Φ2 X L4 screw 3ea assemble
8. Top case
- Φ2.6 X L8 screw 2ea assemble
9. Mirror assy, Handle Pin,Handle
- Φ3 X L12 screw 6ea assemble
10.handle + handle hinge
- M3 X 6 screw 1ea assemble
11. Rear case, Cord cover
- M4x7 screw 4EA, 10 points hook
12. Bottom case assy, Jack cover
- Φ3 X L12 screw 4ea assemble
5. Fan, Wi-Fi, fan assemble
6. Front case + frame assy
- Φ3 X L12 screw 4ea assemble

- 11 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
TROUBLE SHOOTING GUIDE
1. Poor Connection
- Main, LED Board Ass’y
Board connection point
Main Board Ass’y
3C
2A
2B
7
5B
3A 3B3A 46 1 5A
No. Circuit Number Pin count Connections Symptoms of a bad connection
1 P103 80 LD driver Display turns off immediately after power on. or no image
(none functional of LD)
2A,2B P501,P701 40 DMD Board No image (none functional of DPP ASIC)
3A,3B,3C P803,P804,P801 3 FAN Fan doesn’t work, and set turns off automatically
4 P901 4 Temp set turns off automatically
5A,5B P806 4 IR Remote controller Function is not working
6 P952 10 WIFI, Bluetooth Wi-Fi, Bluetooth Function is not working
7 P104 4 KEY pad Keypad Function is not working

- 12 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
1. Poor Connection
- Sub Board Ass’y
Board connection point
Sub Board Ass’y
2
4
5
1 3C 3C
No. Circuit Number Pin count Connections Symptoms of a bad connection
1 P408 8 C/W Display turns off immediately after power on. or no
image (none functional of LD)
2 P407 3 C/W index Display turns off immediately after power on. or no
image (none functional of LD)
3 P405,P406 10,6 Actulator The resolution is decrease
4 P806 20 PSU NO set power ON
5 P404 40 Speaker No sound from the left/right speaker.