Legamaster PTX-8500 UHD User manual

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Service Manual: PTX8500 UHD
Legamaster
Service Manual
Model No.: PTX-8500 UHD

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Service Manual: PTX8500 UHD
Revision History
Version
Date
Page
Section
Description
V1.0
2015.01.16
All
First issued
V2.0
2015.04.29
All
Change PSU (11012436001-AA)

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Service Manual: PTX8500 UHD
HANDLING GUIDE
This 85” monitor is over 100KG in weight, there for two (2) eye-Bolt attachment
locations have been placed on top on the unit, you can use the eye-Bolts provided
(in the accessory box) to hang up this monitor.
The installation of the hooks as below photo, we strongly recommend to follow this method to
hang up this monitor.
Hook : 1SM8XXR15Z1-AA

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Service Manual: PTX8500 UHD
1. Repairing Condition
1.1. Repair Tools
List the type and size of the tools that would typically be used to disassemble the
product to a point where components and materials requiring selective repair can
be removed.
Item
Tool Description
Tool Size (if applicable)
Qty
1
Electric screwdriver
N/A
1 pcs
2
Philip Screwdriver
N/A
1 pcs
3
Philip Screwdriver
N/A
1 pcs
4
Hexagonal Socket
5mm
1 pcs
5
Mini Plastic Nipper
6”
1 pcs
1.2. Operation Space Required
1.2.1. Operation Space Required
1.2.2. Need a clean space (>=300cm*300cm)
1.2.3. Need a stable table (surface>200cm*120cm, load>60kg).

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Service Manual: PTX8500 UHD
2. Access to the key components
2.1. Panel
2.1.1. Remove the Rear Cover

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Service Manual: PTX8500 UHD
2.1.3. Remove the Bezel
2.1.4
. Panel BKT (24
s
crews)

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Service Manual: PTX8500 UHD
2.2. A/D board
(If you only replace A/D board, just take off A/D board cover)
2.3. Power board
(If you only replace Power board, just take off Power board cover)
A/D board cove
r
Power
board co
ver

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Service Manual: PTX8500 UHD
3. Parts descriptions
3.1. Module
E

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Service Manual: PTX8500 UHD
No.
Part No.
Name
Descriptions
1
10050850001-AA
85” Panel
LCD Module. (include LCD panel, Backlight and inverter)
2
11347003911-AB
IR board
Infrared receiver and LED.
3
11347005851-AB
Keypad
OSD Keypad board
4
11347006541-AB
Ethernet Board
Ethernet Remote Control Board
5
11347008963-CA
Docking board
OPS Docking board
6
11341674101-AA
MEMC board
PANEL MEMC board from Panel module
7
1134019U011-CA
AD Board
Main Board
8
11084120391-AA
Speaker
Right and Left Speakers
9
11017001141-AB
EMI board
EMI board
A
11261362451-AA
SSR-40DA
SSR-40DA (Control AC to DC PSU On/Off)
B
11012413061-AA
PSU
Power supply unit (Control AD board)
C
11012436001-AA
PSU
Power supply unit (Control Panel converter)
D
2TG08500001-AA
Touch module
Touch module
E
Invertorboards
Backlight Driver Board

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Service Manual: PTX8500 UHD
3.2. Wiring
3.2.1. Wiring for PCBA

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Service Manual: PTX8500 UHD
OPS Dockingboard

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Service Manual: PTX8500 UHD
No.
Part No.
Name
Descriptions
1
11067026431-AA
IR Wire
IR Board to AD Board
2
11067026421-AB
Keypad Wire
Keypad to AD Board
3
11060175141-AA
RC Wire
AD board to Ethernet board (6P-6P)
4
11060175141-AA
RC Wire
AD board to Docking board (6P-6P)
5
11067005431-AA
Control wire
AD board to Docking board
6
11067030561-AA
Value-Net2UART wire
AD board to Docking board
7
11067026081-AA
AD/B-TS/B wire
AD board to Docking board
8
11084120391-AA
Speaker Wire
Speaker to AD Board
9
11037010731-AA
Displayport wire
AD board to Docking board
A
11067029331-AA
USB extend cable
USB 2.0 extend cable ( A type –A type)
B
11067029331-AA
USB extend cable
USB 2.0 extend cable ( A type –A type)
C
11037003691-AA
HDMI cable
HDMI cable 1.8m
D
11017001241-AA
Adaptor wire
Adaptor to Docking board
E
11060575151-AA
FFC Vx1-Pane
FFC Vx1-Panel.750mm
F
11060540141-AA
FFC Vx1-Panel
FFC Vx1-Panel.400mm.41-41P
G
11060530151-AA
FFC Vx1-Panel
FFC Vx1-Panel.300mm.51-51P
H
11067030591-AA
USB2.0 Touch wire
Docking to PQ-lab touch
I
11067030581-AA
USB extend cable
USB 2.0 extend cable
J
11067030501-AA
USB cable
USB 3.0 extend cable ( A type –A type)
K
11060470141-AA
N306 to SSR control wire
N306 to SSR control
L
11060460161-AA
SSR to AC Power wire
SSR to AC Power
M
11060415181-AA
PSU to AC Socket wire
AC Socket
O
11060414211-AA
Power to ADB wire
Power to ADB
P
11060414282-AA
Power to Converter Wire
Power to Converter
Q
11060417281-AA
Power to Converter (with Bon)Wire
Power to Converter (with Bon)
S
11060475141-AA
ADB to Panel power wire
ADB to Panel

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Service Manual: PTX8500 UHD
4. Troubleshooting
Defect
Code
Symptom
Checking
Actions
R500
No Power
1.Check AC power source, power cord and AC switch.
2.Check PSU
3.Check normal booting.(Refer to page24-Q2)
If PSU abnormal then swap PSU
else Swap AD board.
D33
Power on no display
1.Check PSU
2.Check normal booting.(Refer to page 24-Q2)
3.Check Video source and video cable.
4.Check normal screen.(Test mode, Refer to Page 25-Q3)
Swap PSU
Swap AD board
Swap LCM
D34
Power on no signal
1.Check normal booting.(Refer to page 24-Q2)
2.Check Video source and video cable.
3.Check normal screen.(Test mode, Refer to Page 25-Q3)
Reset to factory default. (Refer to Page23-Q1)
Swap AD board
D30
Power on display
abnormal
1.Check normal booting.(Refer to page 24-Q2)
2.Check Video source and video cable.
3.Check normal screen.(Test mode, Refer to Page 25-Q3)
Reset to factory default. (Refer to Page23-Q1)
Swap AD board
Swap LCM
R501
Turn off abnormal
1.Check OSD key lock function.
2.RCU defect or no battery.
3.OSD Keypad defect.
Reset to factory default. (Refer to Page23-Q1)
swap AD board
Swap keypad
R502
Power saving abnormal
1.Check video source and unplug all video cable.
Reset to factory default. (Refer
to Page23-Q1) Swap AD Board
D20
Display shift
1.Check video source and unplug all video cable.
2.Plug the video cable again.
Auto tune
Reset to factory default. (Refer to Page23-Q1)
D17
Press panel waving
1.Check LVDS wire connection.
2.Check normal screen.(Test mode, Refer to Page 25-Q3)
Reset to factory default. (Refer to Page23-Q1)
swap LVDS wire
Swap AD Board
Swap PSU
Swap LCM
D500
Display noise
1.Check video source and video cable.
2.Check LVDS wire connection.
3.Check normal screen.(Test mode, Refer to Page 25-Q3)
Reset to factory default. (Refer to Page23-Q1)
Swap LVDS wire
Swap AD Board
Swap PSU
Swap LCM
D37
Display flicker
1.Check LVDS wire connection.
Reset to factory default
Swap LVDS wire
Swap AD Board
Swap PSU
Swap LCM
D06
R.G.B. display
abnormal
1.Check video cable.
2.Reset to factory default
3.Check LVDS wire connection.
Swap LVDS
Swap AD Board
Swap LCM
D501
Gray scale display
abnormal
1.Check LVDS wire connection.
Reset to factory default
Swap LVDS
Swap AD Board
Swap LCM
D15
Vertical weak line
1.Check LVDS wire connection.
Swap LVDS
Swap AD Board Swap LCM
D502
Vertical band defect
LCM replace
D503
Horizontal band defect
LCM replace
D37
Beat display flicker or
shut down
1.Check video source and cable connection.
2.Check all wire
Swap wire
Swap AD Board
Swap PSU
D17
Display wave
1.Check video source and cable connection.
Swap PSU
Swap AD Board
Swap LCM
D16
Display shake
1.Check video source and cable connection.
Swap PSU
Swap AD Board
Swap LCM
E11
Polarizer Scratch
LCM replace
E14
LCM broken
LCM replace
D19
Display Mura
LCM replace

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Service Manual: PTX8500 UHD
D53
Image retention
LCM replace
D23
Vertical line defect
LCM replace
D24
Horizontal line defect
1.Check video source and cable connection.
LCM replace
D43
No backlight ( an side
backlight has failed)
1.Check PSU
2.Check Panel
Swap PSU. Swap LCM
T01
No Touch
1.Check USB Cable connection
Swap Touch
T02
Touch is not accurate
1.Check Screen resolution
Touch calibration
T03
Not Multi-Touch
1.Check Operating Systems
2.Check Touch driver
Install Touch driver
N500
NDF (No defect found)
N/A
Function test
Burning test 4 hours
K01
No 4K2K output
1.Check OSD setting
Check OSD->Adv. Settings->EDID
Setup->Select 4Kx2K

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Service Manual: PTX8500 UHD
4.1. Check PSU Functions
4.1.1. 11012413061-AA

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Service Manual: PTX8500 UHD
Connector Descriptions
REF. ID
PIN#
SIGNAL
REF. ID
PIN#
SIGNAL
REF. ID
PIN#
SIGNAL
REF. ID
PIN#
SIGNAL
P801
1
L
P802
1
DIM
P803
1
24VDC
P804
1
24VDC
2
N
2
BL ON
2
24VDC
2
24VDC
3
PW ON
3
24VDC
3
24VDC
4
ACD
4
24VDC
4
24VDC
5
DET
5
24VDC
5
24VDC
6
5.2VS
6
GND
6
GND
7
5.2VS
7
GND
7
GND
8
GND
8
GND
8
GND
9
12VDC
9
GND
9
GND
10
12VDC
10
GND
10
GND
11
GND
11
DET
11
DET
12
GND
12
BL ON
12
BL ON
13
12VDC
13
N/A
13
N/A
14
12VDC
14
DIM
14
DIM
15
GND
16
GND

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Service Manual: PTX8500 UHD
1. Check the FUSE is OPEN or SHORT.
a. Turn off the power
b. Check the FUSE
i. If the FUSE is “SHORT”(0Ω) then go to
step2
ii. If the FUSE is “OPEN” then replacement
a new FUSE
c. Turn on the power 5 seconds then go to step
a. again.
d. If the FUSE is “OPEN” again then the PSU
has been failure.
2. Check P802 (DC 12V)
a. Turn on the power and check pin13(12V) to
pin16(GND) ,If measured 12 Volts, go to
Step
3
b. If not then the PSU has been failure.
3. Check P803/P804 (DC 24V)
a. Turn on the power and check the pin1(24V)
to pin10(GND) of P803/ P804
i. It must output 24 volts.
ii. If not then the PSU has been failure.
a
c
b
a
a

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Service Manual: PTX8500 UHD
4.1.2. 11012436001-AA
Connector Descriptions
REF. ID
PIN#
SIGNAL
REF. ID
PIN#
SIGNAL
Input
1
FG
Output
1
RC+
2
AC/L
2
RC- & GND
3
AC/R
3
+5Vss
4
GND
5
GND
6
+24V
7
+24V
Input
Output

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Service Manual: PTX8500 UHD
4.2. Check the Versions of SubMCU and Firmware
There are two types of firmware in the monitor.
One is the SubMCU and the other is the firmware of the AD Board
Check firmware / SubMCU version on menu (“Information”).
Step1. Press “Menu” (Controller) to open menu of the monitor
Step2. Select “Information”
Step3. See :
Firmware Version: Vx.xx
SubMCU Version: SubVer - Vxx
5. Q&A
Q1. How to reset to Factory Reset?
Ans.: OSD Menu -> Adv. Setup -> Factory Reset-> Yes
1
2
3

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Service Manual: PTX8500 UHD
Q2. How to check the normal booting of the monitor.
Ans.:
Step1. Disconnected all video cable.(VGA, DVI, Audio,…etc.)
Step2. Connect the AC power cord only.
Step3. Turn on the AC switch.
The normal boot status as Fig. A
(UFig. AU)
Booting Status Table
Status
Descriptions
Image
A
Turn on the AC power and click sounds from
PSU
Abnormal:
Check AC power source.
Check PSU functions
B
Show black screen and Orange LED On /
Blinks. (light on and off)
Abnormal:
Check OSD setting and firmware
Check AD board
C
Show black screen and see the light from backlight.
(Backlight ON)
Abnormal:
Check PSU(12 and 24V) functions
Check AD board
D
Show “No video input”
Abnormal:
Check source cable
Check OSD setting and firmware
Check AD board