LG CineBeam PH30N User manual

MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SERVICE MANUAL
Copyright © 2019 - 2020 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.
P/NO : MFL67691202 (2006-REV01)
PH30N PH30N-GL
CJH310N CJH310N-GL
DLP PROJECTOR

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Only training and service purposes.
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ........................................................................ 3
SPECIFICATION ...................................................................................... 4
SOFTWARE UPDATE .............................................................................. 7
BLOCK DIAGRAM ................................................................................... 8
EXPLODED VIEW .................................................................................... 9
DISASSEMBLY GUIDE .......................................................................... 10
ASSEMBLY GUIDE ................................................................................ 12
TROUBLE SHOOTING GUIDE ...............................................................16

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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 MΩ and 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
1.5 Kohm/10W
0.15µF
To Instrument's
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
When 25A is impressed between Earth and 2nd Ground
for 1 second, Resistance must be less than 0.1
*Base on Adjustment standard
SAFETY PRECAUTIONS

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Only training and service purposes.
SPECIFICATION
1. Application range
This specication is applied to the PH30N model.
2. Test Specication
Each part is tested as below without special appointment.
1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F),
CST: 40 °C ± 5 °C
2) Relative Humidity: 65 % ± 10 %
3) Power Voltage
: Standard input voltage (100-240 V~, 50/60 Hz)
* Standard Voltage of each products is marked by models.
4) Specication and performance of each parts are followed
each drawing and specication by part number in accord-
ance with BOM.
5) The receiver must be operated for about 20 minutes prior to
the adjustment.
3. Test method
1) Performance : LGE TV test method followed.
2) Demanded other specication
- Safety : CE, IEC specication
- EMC: CE, IEC specication
- Wireless : Wireless HD Specication (Option)
NOTE : Specications and others are subject to change without notice for improvement.
4. Technical Specification
No Item Specication Remark
1Basic Parameters Product Description Pico Projector
OS Linux
2 CPU Parameters
CPU Supplier Mstar
CPU Model No. 6683
CPU Core Numbers A53*4
CPU Frequency 1GHz
GPU Model No. Mali470
3 Storage Capacity DDR3(RAM) 512MB(internal)+ 256MB
Internal Memory 4GB eMMC
4 Optical Parameters
Light Engine Model No. Acts 3LEDxxx
Display Technology DLP .23 QHD
Lamp Source (white LED, RGB LED, Laser) RGB LED
Lamp Life 2 hrs (Energy Saving max)
Native Resolution 1280 X 720
Aspect Ratio 16:9
White Light Brightness (ANSI lumens) 200 lm (Typ.) @ 21.2W (according to light engine
spec)
Brightness Mode Normal mode (200lm)
Contrast Ratio(Standard Mode) 400:1
Throw Ratio 1.2
Colour Temperature 6500K, 9300K (default) , 11000K @ LED 50 °C
to 60 °C
Screen Size (Diagonal) 25" - 100"
Projection Distance 0.5m - 3m
Focus Adjust Manual
Projection Mode Front/Rear/Front Ceilling/Rear Ceilling
Keystone Correction Yes, (Auto adjust 1D-V) TI3434

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No Item Specication Remark
5Mechanical Keys
Power YES (share with OK button)
Up YES
Down YES
Left YES(share with V-)
Right YES(share with V+)
OK N/A
Menu N/A
Back N/A
Volume N/A
Power Switch Yes(shut down or power o󰀨 the battery)
Mode Switch N/A
6 Focusing Knob Focusing Knob YES
7 Dust Lens Cover Dust Lens Cover N/A
8 Wireless Parameters
WiFi 802.11 a/b/g/n/ ac (TWCM-K505D(MT7668))
(2.4GHz & 5GHz)
Bluetooth Bluetooth 5.0
LTE N/A
LAN N/A
9 Speaker Internal Speaker 1x 1 Watt
Alexa N/A
10 Fan
Axial Fan Yes, 2 pcs
Requirement
Fan speed(RPM) must be controlled according to
temperature of NTC on PCBA at Air inlet (enviro-
ment temp.)
11 Noise Operating Noise(From 1m Distance)
"30dBA Typical (32 dBA at Maximum) at Max
brightness,30 °C
(TBD at ECO mode)"
12 Battery Internal Battery 2600 mAh/7.2V ( 18.72Wh)
charging time 2 hours at power-o󰀨 mode
13 IR Receiving Head Infrared YES
14 DC-IN Power Plug Conector 19V / 2.53A ( 48W)
15 Power Indicator Dual Red/Green YES(Red: charging / Green: fully charged)
16 Antenna Connector Wi External Antenna Connector N/A
17 Intput Audio/Video CVBS & Audio 3.5 mm A/V Jack N/A
HDMI 1080P YES- Standard port
18 Output Audio SPDIF N/A
Headphone YES
19 Input PC USB 2.0 USB 2.0 Host (Type A 5V/1A)
20 External Memory Reader
USB Memory Device (Memory Stick, Hard
Disk) N/A
Memory Card N/A
21 Tripod Joint Tripod Joint YES

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No Item Specication Remark
22 Wireless Display Miracast
"Miracast cellphone list:
1) LG : G6, G7, V30, V40
2) Samsung : Galaxy S8, Galaxy S9, Galaxy
Note 8
3) Huawei : P10, P20
WiDi Not support"
Airplay N/A
23 3D Active 3D/2D to 3D N/A
24 Multimedia
Internal Media Player YES
Supported Video Formats
MPEG2,MPEG2_HD,MPEG4, MPEG4_SD,
MPEG4_HD, H.264, VC1, WMV, VP9, VP8,
HEVC
Supported Audio Formats Dolby Digital, Dolby Digital Plus, DTS_HD
Supported Photo Formats JPG, JPEG, BMP, PNG
25 Language Supported Language
"system language : Korean / English / L-
Spanish /
/ Brazilian Portuguese /
Spanish / French / German /
Italian / Polish / Portuguese /
Russian / Turkish / Slovenian /
Bulgarian / Croatian / Hungarian /
Czech / Romania / Dutch /
Japanese / Indonesian / Italian / Arabic / Tai-
wanese / Hindi / Chinese Simplied"
26 UI General/Customized following LG style
27 FW upgrade OTA No

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SOFTWARE UPDATE
There are two download methods for the projector of this
model. Pls prepare as below before download:
Copy the download le MstarUpgrade.bin to a U disk. The U
disk le system must be FAT32.
The rst method: Panel key download:
Step 1: turn the power button on the panel of the machine to
o󰀨. Insert the USB ash disk.
Step 2: press the up key on the panel. Keep pressing for a
long time.
Step 3: turn the power button on from o󰀨.
Step 4: wait for the light to light up. The upgrade interface ap-
pears. Release the up key on the panel
The second method: Factory mode menu download:
Step 1: turn on the machine. Make sure the display interface
is HDMI display or no signal display. Insert the USB
ash disk.
Step 2: press the remote control left key, right key, left key,
right key, left key, right key, OK key in turn.
Step 3: select the software update (USB) option, press OK
key, and the continue reminder menu will pop up.
Step 4: Press the left key of the remote control. Select the yes
option to enter the upgrade interface

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BLOCK DIAGRAM

Copyright © - LG Electronics Inc. All rights reserved.
Only training and service purposes.
410
560
540
AR1 720
600
100
130
400
120
HW1
570
700
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

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Only training and service purposes.
DISASSEMBLY GUIDE
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- 2 -
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Only training and service purposes.
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1. DMD Cable assembly
Engine
DMD cable
connectto
drive plate
Press DMD
cable, then
stick foam
cotton
Stick TESA
tape
Press-plate shall be assembled in
place, and two screws shall be
vertically locked in place at 1 and 2
position
Check fo am cotton
stick to th e en gine
DMD cable in place
Stick
conductive
cloth
Press the
step in place
ASSEMBLY GUIDE

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Only training and service purposes.
2. 50 Pin Cable assembly
1) First, open the wing up
2) Insert 50 Pin FPC cable
3) Close the wing down for locking
1. First, Open the wing up
2. Insert the FPC Cable
3. Close the wing down
for locking.

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3. Set Assembly for the Top case
and Bottom case
1) The slide switch should be place on the left side before Top
case assembling.
2) Slide Switch on the Top Case be also placed on the left
side before assembling.
3) Check the position of all slide switch rst. And then assem-
ble the top case as above photo.

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4. Fan assembly
Assemble fan
baffle
The outlet
surface of the
fan should
correspond to
the snap of the
baffle sl ot
Fan baffle
Can not
remo ve th is
separating
paper
1. Stick
Regular
PORON
pad
Check the
fan baffle
assemble in
place
Th e fan baffle is facing outward,
and the corresponding limit slot
is assembled in p lace
Th e fan baffle is facing outward, and
the corresponding limit slot is
assembled in place
The lower side
of conductive
cloth should be
flush with the
fan
Press the
step in
place
The fans in these
two places need to
be pasted
1. stick
the long-
end of
conducti
ve cloth
3.Remove
the
separating
paper 4.Stick the
fan’s PORON
pad
Margin is
required
here
2.Stick the short-end of
conductive cloth(its right side
should be flush with the edge of
MB)

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TROUBLE SHOOTING GUIDE
- Cabling problem
1) Disassemble the machine and check whether FPC cable and wire are installed in place;
2) If it is conrmed that the connection is still poor after being installed in place, pls try to plug and insert the FPC cable, meanwhile,
the gold nger and socket can be cleaned to eliminate the poor contact caused by grease and other foreign material.
- No Picture
1) Disassemble the machine to check whether the drive plate and FPC cable are installed in place;
2) Remove the main board and drive board, and use a jig to verify whether the main board and drive board are normal;
3) Remove the engine, and use a jig to verify whether it is normal.
- Picture Unstable
1) Disassemble the machine to check whether the drive plate and FPC cable are installed in place;
2) Remove the main board and drive board, and use a jig to verify whether the main board and drive board are normal. If it is con-
rmed that the main board is abnormal and the picture is sometimes good or sometimes bad, try to replace the FPGA;
3) Remove the engine , and use a jig to verify whether it is normal.
- Power o󰀨 after power on
Check whether the battery capacity is insu󰀩cient;
1) Check whether the fan works normally;
2) tlDisassemble and check whether the thermal pad of PLDA 3000 is installed in place.
- No Power and No power on
Check whether the battery capacity is insu󰀩cient;
1) Remove the main board and drive board, and use a jig to verify whether the main board and drive board can work normally;
2) Remove the engine , and use a jig to verify whether it is normal.
- No sound output
1) Disassemble the machine and check whether SPK socket is connected in place;
2) Replace SPK
3) Visual check whether the audio circuit exists pseudo soldering or damage;
4) Judge the defective device by measuring the signal of audio circuit, then replace a new one.
- Out of focus
1) Replace a new engine
- etc

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①→②→
←③
←④
↓
⑥A→
⑦→
⑤
↓
⑧
Connect to board ○→
↑
⑥B
⑨→
↑
⑩
No. Circuit Number Pin count Connections Symptoms of a bad connection
1 CN1302 5Battery Can not power on.
2 CN2102 2 Speaker No sounds.
3,4 CN2502,CN2501 4,4 FAN The fan does not work.
5CN2602 10 Actuator(engine) The picture quality is not good.
6A,6B CN2401, CN6003 80,80 R/G/B Data Red ,Green and Blue LED does not turn on.
7CN2504 50 R/G/B LED(engine) Red ,Green and Blue LED does not turn on.
8 CN1801 12 WiFi-BT Can not connect both Wi and Bluetooth.
9 CN6006 40 DMD(engine) Red ,Green and Blue LED does not turn on.
10 CN2303 5N/C For developers.

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- Optic Engine can not turn on/ No picture
LED in dicator ON
at st-by
Change Main
B/D
Check the
connecting status
of 40p cable（DMD）
No
Yes
Re-connect
the Cable
Check the
connecting status of
50p cable（R/G/B LED）
Re-connect
the Cable
Yes
Yes
No
No
Changethe
Mai n B/D
Changethe
Drive B/D
No
Changeoptic
Engine
No
Check Poor connecti on
or D amag ed cable
Check Poor connecti on
or D amag ed cable

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- No funciton
Optic Engine turn on ,
but bot function
Check the
connecting status
of 40p cable（DMD）
Yes
Re-connect
the Cable
Check the
connecting status of
50p cable（R/G/B LED）
Re-connect
the Cable
Yes
Yes
No
No
Changethe
Mai n B/D
Changethe
Drive B/D
No
Changeoptic
Engine
No
Check Poor connecti on
or D amag ed cable
Check Poor connecti on
or D amag ed cable

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- Image noise(vertical/horizontal line)
vertical/horizontal line
Check the
connecting status
of 40p cable（DMD）
Yes
Re-connect
the Cable
Yes
No
Changethe
Mai n B/D
Changethe
Drive B/D
No
Changeoptic
Engine
No