LG HF80JA User manual

P/NO : MFL69847301 (1701-REV00)
CHASSIS : FZ71E
MODEL : HF80JA HF80JA-NA
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
DLP PROJECTOR
SERVICE MANUAL
CONFIDENTIAL
Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
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
SOFTWARE UPDATE ...............................................................................6
BLOCK DIAGRAM ................................................................................... 7
EXPLODED VIEW .................................................................................... 8
DISASSEMBLY GUIDE ............................................................................ 9
ASSEMBLY GUIDE ................................................................................ 10
TROUBLE SHOOTING GUIDE .............................................................. 12

- 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

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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 FZ71E
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.
-Wireless: WIFI module, Bluetooth module – Korea
4. Model General Specification
No Item Specication Remark
Min Typ Max Unit
1Video input applicable
system
1) NTSC M
2) ATSC
HF80JA-KR(Korea)
HF80JA-NA(US) 3.579545 / 60 Hz
1) NTSC M
2) PAL-B,D,G,H,I
3) PAL M
4) PAL N
5) PAL 60
6) SECAM
3.579545 / 60 Hz
4.433618 / 50 Hz
3.575611 / 60 Hz
3.582056 / 50 Hz
4.433618 / 60Hz
2 Available channel
1) VHF : 02~13
2) UHF : 14~69
3) DTV : 02-69
4) CATV : 01~158
5) CADTV : 01~158
HF80JA-KR( Korea)
3 Power DC 19V @ 7.37A (140W) Set only
4 Input Voltage AC 100 ~ 240(±10%)V, 50/ 60Hz
5 Market
Korea HF80JA-KR
Global
US HF80JA-NA
6 Picture size FULLHD (1920 x 1080)
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 %

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Only for training and service purposes.
5. Supported video resolutions
5.1. 2D MODE
5.1.1. HDMI Input (PC/DTV)
No. Resolution H-freq (kHz) V-freq (Hz) Pixel clock (MHz) Proposed DDC
HDMI-PC
1 640*350 31.468 70.09 25.17 EGA X
2 720*400 31.469 70.08 28.32 PC98(DOS) O
3 640*480 31.469 59.94 25.17 VESA(VGA) O
4 800*600 37.879 60.31 40.00 VESA(SVGA) O
5 1024*768 48.363 60.00 65.00 VESA(XGA) O
6 1152*864 54.348 60.053 80.00 VESA(XGA+) O
7 1360*768 47.712 60.015 85.50 VESA(WXGA) O
8 1280*1024 63.981 60.02 108.0 VESA(SXGA) O
9 1920*1080 67.5 60.0 148.5 HDTV 1080P O
HDMI-DTV
1 720*480 31.47 60.0 27.027 SDTV 480P
2 720*480 31.47 59.94 27.00 SDTV 480P
3 720*480 31.50 60.0 27.027 SDTV 480P
4 1280*720 45.00 60.00 74.25 HDTV 720P
5 1280*720 44.96 59.94 74.176 HDTV 720P
6 1920*1080 33.75 60.00 74.25 HDTV 1080I
7 1920*1080 33.72 59.94 74.176 HDTV 1080I
8 1920*1080 67.50 60.0 148.50 HDTV 1080P
9 1920*1080 67.432 59.939 148.352 HDTV 1080P
10 1920*1080 27.000 24.000 74.25 HDTV 1080P
11 1920*1080 26.97 23.976 74.176 HDTV 1080P
12 1920*1080 33.75 30.000 74.25 HDTV 1080P
13 1920*1080 33.71 29.97 74.176 HDTV 1080P

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Only for training and service purposes.
SOFTWARE UPDATE
(1) Turn on Projector.
(2) Insert the USB including rmware.(The rmware must be copied to “LG_DTV” folder in USB)
(3) When insert USB to Projector, USB UPDATE window is displayed automatically.
(4) Select the [INSTALL] button, [USB UPDATE IN PROGRESS] window is displayed, and then update is started.
(5) Select the [Check Now] button, you can check the update progress.
(6) When update progress is completed, [NEW UPDATE INSTALLED] is displayed, and select the [YES] button,then Projector will
be restarted
(7) If Content list like a Picture 5 is displayed, select the [x] button, and keep going on update.
※ If Projector have been connected on Internet by Wired or Wireless AP, The Projector will Update by itself.

- 7 - Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
BLOCK DIAGRAM
0.47 DMD
IR
Audio AMP
NTP7515D
Headphone
USB1
MHL/HDMI
DLP
Processor
DLPC3439
Master
Display SOC
MSD93F2G M2
LGE6322
TDJS-H301F
TUNER
3W
Phosphor
Wheel
Wheel Driver
PMD1000
LD Driver
- RT8482
R/G/B Enable
CW control
< CLK/P12V/PWM
Adaptor
140W
USB2
HDMI
3W
SPDIF
Jack Board
LAN
DLP
Processor
DLPC3439
Slave
WiFi/BT
Combo
EEPROM DDR3 Memory
H5TQ4G63
4Gb x 2
256Mx16 bit
Temp
NTC
Micom
R5F100G
Auto Keystone
BMA255
eMMC
THGBMDG5D1
4GB
Memory + Controller
Warping
IP00C787
LVDS x 2 TTL
RGB888
LS_CLK, DEN_ARSTZ,
Wdata, Rdata
LS_Rdata
Sub LVDS Dtata
Wdata( CLK
DMD Power
DLPA3000
CW Index
1.8V, VOFS, VRST, VBIAS
DC 19V
DDC
12V
FAN-
PWR
Eye Protection
Sensor
Sub LVDS Dtata
Wdata, CLK
LD : 35V 3.0 A
S-Flash
S-Flash

- 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
300
120
310
100
600
400
560
530
540
800
510
900
910
520
700
601
AR2

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Only for training and service purposes.
DISASSEMBLY GUIDE
1. loosen 4 Screws in the bottom side
2. Separating Bottom from Top Case
Screw
3. loosen a Screw at deco lens
4. Separating deco lens from Engine
5. Separating Rear bracket from top case
6. loosen 3 Screws in the top case
7. Separating Engine from Top Case
8. Separating PCB B/ D
9. loosen 4 Screws in the middle case
10. Disassemble complete

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Only for training and service purposes.
ASSEMBLY GUIDE
1.Middle case + Engine : Φ3 screw 4ea
2. Joystick + Middle case : Φ2 screw 2ea
3. Jack B/D+ Middle case : Φ2.6 Screw 3ea
4. Middle case + Fan + Speaker
5. Middle Case + Combo
6. Main B/D+ Middle case : Φ2.6 Screw 5ea
7. Middle case + Top Case : Φ2.6 screw 3ea
Hook Screw
8. Rear Bracket + Top Case
9.Deco Lens + engine : Φ2 Screw 1ea
10.
Bottom Assy
: Φ2.6 Screw 4ea

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Only for training and service purposes.
ASSEMBLY GUIDE
- Location of Fans and Air Flow
䮤
Cooling Direction
- Inlet : Front
- Outlet : Rear
䮤Applied FAN
1. - P/N : EAL44320706
- Size : 70*70*25mm
- Quantity : 1EA
- Type : Axial Fan (Nidec)
Air Flow
Fan Label
attachment
direction
Require check before Fan assy replacement work
1. Fan : The fan must be placed in the correct position (refer to Set Assembly – Fan Positions and Air Flow)
2. Cushion : Attach the cushion to top and bottom of the fan or wrap it around the fan
(hold the case and avoid touching the blade while working on the fan)
: Fan Module (EAL44320706)
: Cushion (MDS64155509)
1
2
2
1 2
Fan Label
attachment
direction
- Fan Work Guide

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Only for training and service purposes.
TROUBLE SHOOTING GUIDE
1. Poor Connection
- Main, LED Board Ass’y
2
1
4 5
Board connection point
6
3
7
8
No. Circuit Number Pin count Connections Symptoms of a bad connection
1 P702 80 DMD Board No image (none functional of DPP ASIC)
2 P104 40 Jack Board Cannot Working Remote Controller, Sound out(AV, SPDIF),
Wired Lan and DTV Tuner
3 P652 3 P/W Index No Image (DMD Lock by Detecting Phospher wheel trouble)
4 P651 4 P/W Motor No Image (DMD Lock by Detecting Phospher wheel trouble)
5 P601 4 Speaker No sound (Internal Speakers)
6 P304 10 Local Key Local Key doesn’t work or may be worked abnormally
7 P801 4 FAN Fan doesn’t work, and set turns off automatically
8 P105 8 WIFI, Bluetooth Wi-Fi, Bluetooth Function is not working

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Only for training and service purposes.
1. Poor Connection
- LD Driver, Jack Board Ass’y
11
Board connection point
9
10
No. Circuit Number Pin count Connections Symptoms of a bad connection
9 P1801 8 LD Bank Laser Lamp doesn’t Work
10 P1802 20 Main Board Laser Lamp doesn’t Work, Set turns off automatically
11 P50 40 Main Board Cannot Working Remote Controller, Sound out(AV, SPDIF),
Wired Lan and DTV Tuner

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Only for training and service purposes.
1. Poor Connection
Symptom Defective parts Checking Order Major the parts Cause of
Power
No Power
Check flug Contect > DC_JACK crack(on the Main B/D) Adapter No power
Check voltage between both pole of C893 or C894 on the Main Board
(Maybe...19V) on power condition Main, Driver Power Short
On Work, Turn off automatically
Check flug Contect, Adapter Voltage(OVP/OCP) Adapter No power
Check Amb. Temp. and is there the heaters. around the projector High Temp. High_temp_Error
FAN working, Cable connecting Connection
Turn Off/On automatically
Changed Chenal, Volume or UI automatically Joystick, FFC Control_Borad Joystick Ass’y
Image
No Image, No Color, Flickering Exchane parts following order(one by one) and check working normally
- Main > Driver > engine Ass’y > engind cable > FPC
Connection or
parts defect
No Image, V/H Bar, Noise on Screen DMD B/D, Main,
No Image after Flickering Cable (Index, P/W) > PW crack > photo sensor > main PW Not detecting P/W
No Color, Dimming, Abnormal Color Exchange engine ass’y > Driver LD or driver
Judder, Conture at Fast scean Check Live Scan ON/OFF NDF. Contour or Judder
Pixel(Dark, White), Still image - DMD_Board DMD BD / DMD
Abnomal focus, Cloudy Particle on Lens surface, not pursued cleaner, Shock from outward Lens Focus
Radder Frame, cannot controling Keystone Auto Keystone ON/OFF NDF. Keystone setting
Sound
No optical out, Loudy Speaker Noise Connection on Optical cable Main SPDIF
Internal Speaker sound EarPhone > Main-Jack FPC > Jack B/D > Main On detecting AV out
No Sound, Sound Noise, Left or right only Speakers Defect > Connection Speaker Cable(internal or external)
Noise
Fan noise, not working, vibration Particle in Fan, Fan blade crack FAN FAN
Case &
Lens
Tripod mount crack Informal tripod use Bottom case TripodNut
Scratch, crack Shock from outward Case TOP/Bottom
Scratch(Surface of Lens), Blur on Screen Particle on Lens surface, not pursued cleaner, Shock from outward Lens Scratch
Coating crack on the lens Touching lens on Projecting, not pursued cleaner Lens Coating
Etc.
Remote Not working, iregular Low power Battery, 3phase light or high power light from ambient Remote Ireguler detecting
Cannot Receiving IR Crack or split Ir receiver Main IR_Receiver
Motion Remote not working, Cannot Paring Low power Battery, B/T cable Motion remote Pareing
Cannot detecting HDMI input HDMI/MHL cable, host device(STB, PC, laptop, DVD) Main HDMI
Cannot play Movie File on USB Memory USB memory defect > try to play movie file on PC NDF CODEC.
Mirroring, connecting Fail WiFi environment, OS Ver. In the Moble phone, WiFi B/D, WIFI cable WiFi module Miracast/WD

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Only for training and service purposes.
SET problem
occurrence
Yes Set turn off
Automatically?
Check a power cord connection
After Pulling out the adapter DC Plug
Adapter replacement
Temp problem
Or Fan problem?
FAN connection Check
FAN defect check
Main b/d defect check
Broken image
(Vertical / parallel bar)
DMD Cable check
Engine replacement
Yes
Yes “Temp”
No
No
DMD connection check
保To check the Phenomena,
Please check “power off status” in the In -Start mode
as quickly as possible while Set working
A light source on
but No image
A light source
does not turn on
Driver connection check
Main b/d defect check
Main b/d defect check
“FAN”
Joystick LED
Works?
No
No
Yes
Adapter Power 19V
A Light Source
turned on?
No
Yes
Main b/d defect check
Main b/d defect check
FANx Error
(“x” is Fan No.)
High temp Error
Ambient Temp Err
SET Power On?
Driver B/D Defect Check
Main B/D defect check
2. Flow Chart for major symptom