LG HF80JA Service Manual page 14

1. Poor Connection
Symptom
No Power
Power
On Work, Turn off automatically
Turn Off/On automatically
Changed Chenal, Volume or UI automatically
No Image, No Color, Flickering
No Image, V/H Bar, Noise on Screen
No Image after Flickering
No Color, Dimming, Abnormal Color
Image
Judder, Conture at Fast scean
Pixel(Dark, White), Still image
Abnomal focus, Cloudy
Radder Frame, cannot controling Keystone
No optical out, Loudy Speaker Noise
Sound
Internal Speaker sound
No Sound, Sound Noise, Left or right only
Noise
Fan noise, not working, vibration
Tripod mount crack
Case & Scratch, crack
Lens
Scratch(Surface of Lens), Blur on Screen
Coating crack on the lens
Remote Not working, iregular
Cannot Receiving IR
Motion Remote not working, Cannot Paring
Etc.
Cannot detecting HDMI input
Cannot play Movie File on USB Memory
Mirroring, connecting Fail
Defective parts Checking Order
Check flug Contect > DC_JACK crack(on the Main B/D)
Check voltage between both pole of C893 or C894 on the Main Board
(Maybe...19V) on power condition
Check flug Contect, Adapter Voltage(OVP/OCP)
Check Amb. Temp. and is there the heaters. around the projector
FAN working, Cable connecting
Joystick, FFC
Exchane parts following order(one by one) and check working normally
- Main > Driver > engine Ass'y > engind cable > FPC
DMD B/D, Main,
Cable (Index, P/W) > PW crack > photo sensor > main
Exchange engine ass'y > Driver
Check Live Scan ON/OFF
-
Particle on Lens surface, not pursued cleaner, Shock from outward
Auto Keystone ON/OFF
Connection on Optical cable
EarPhone > Main-Jack FPC > Jack B/D > Main
Speakers Defect > Connection Speaker Cable(internal or external)
Particle in Fan, Fan blade crack
Informal tripod use
Shock from outward
Particle on Lens surface, not pursued cleaner, Shock from outward
Touching lens on Projecting, not pursued cleaner
Low power Battery, 3phase light or high power light from ambient
Crack or split Ir receiver
Low power Battery, B/T cable
HDMI/MHL cable, host device(STB, PC, laptop, DVD)
USB memory defect > try to play movie file on PC
WiFi environment, OS Ver. In the Moble phone, WiFi B/D, WIFI cable
- 14 -
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes.
Major the parts Cause of
Adapter No power
Main, Driver Power Short
Adapter No power
High Temp. High_temp_Error
Connection
Control_Borad Joystick Ass'y
Connection or
parts defect
PW Not detecting P/W
LD or driver
NDF. Contour or Judder
DMD_Board DMD BD / DMD
Lens Focus
NDF. Keystone setting
Main SPDIF
On detecting AV out
FAN FAN
Bottom case TripodNut
Case TOP/Bottom
Lens Scratch
Lens Coating
Remote Ireguler detecting
Main IR_Receiver
Motion remote Pareing
Main HDMI
NDF CODEC.
WiFi module Miracast/WD