Sony XR-55A90J User manual

SERVICE MANUAL (COMMON)
GR1VH CHASSIS
Segment : AS
9-888-790-01
OLED TV
Sony EMCS (M) Sdn. Bhd., SHES-M
©2021.02
ORIGINAL MANUAL ISSUE DATE: 2021.02
Conditions of Use:
(1) Please use this information only for the purpose of performing repair, maintenance and/or configuration services of the Sony products
(hereinafter the “Repair services”) under the service agreement entered into with the Sony group company (hereinafter the “Service
agreement”).Using this information for any purpose other than the purpose described foregoing is forbidden.
(2) Only the Authorized Servicer’s officers, employees or subcontractors (including their officers and employees) whose duties justify aneed-to-
know and who have agreed to hold confidential this information (collectively hereinafter the ”Permitted users”) are permitted to access and
use this information.To disclose or disseminate to any person other than the Permitted users is forbidden.
(3) Destroy or erase any and all portion of this information promptly in an irrecoverable and secure fashion after achieving the purpose
described in Section (1) above.
(4) Do not copy, replicate, reproduce, alter, translate, transmit, sell, lease, or distribute this information in whole or in part without the prior
written permission of the author.
(Notwithstanding foregoing, it is permitted to copy and distribute this information to the Permitted users.)
(5) Please notify immediately any leakage, loss, theft, misappropriation, or other misuse of this information by e-mail to the following address:
[e-mail]
(6) In addition to the above, the terms and conditions of the Service agreement shall be applied to using this information.
Revision of Information:
This information may be changed or updated at any time without any prior notice.Please confirm that this information is up-to-date before
using it.
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Version Date Subject
12021.02 1st Issue
REVISION HISTORY
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THIS SERVICE MANUAL CONTAINS COMMON INFORMATION FOR BELOW REGIONS AND MODELS:
REGION
AMERICA ASIA CHINA
MODEL
XR-55A90J XR-65A90J
XRM-55A90J XRM-65A90J
MODEL LIST
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Note: Pictures provided in this manual may have difference from actual sets
Please refer Service Manual –Unique for below
information :
Disassembly and Removal Caution
Wire Dressing
Circuit Board Location
Exploded Views and Part Lists
Title Page
SAFETY
NOTES 5
SELF DIAGNOSTIC FUNCTION
13
TROUBLESHOOTING
19
SERVICE ADJUSTMENT
71
DIAGRAMS
82
HANDLING GUIDE
85
TABLE OF CONTENT
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Whenevera TV Mainboard is replaced, the correctTV ModelandSerial number must be
reinserted into memory.
This is a MANDATORY procedure thateach service center must apply.
Please referto the chapter of ADJUSTMENT in this service manual to findouthow to set the
modelnumberand serial number in service mode.
1-2-1. Caution Handling of LCDPanel
When repairing the LCDPanel, make sure you are grounded with a wrist band.
When repairing the LCDPanel on the wall, the panel must be secured using the 4
mountingholes on the rear cover.
1) Do not press the panel or frameedge to avoid the risk of electric shock.
2) Do not scratch or press on the panel with any sharp objects.
3) Do notleave the moduleinhigh temperature or in areas of high humidity for an
extendedperiod of time.
4) Do not expose the LCDpanel to direct sunlight.
5) Avoid contact with water. It may cause short circuit within the module.
6)Disconnect the AC power when replacing the backlight (CCFL)or inverter circuit. (High
voltage occurs at the inverter circuit at 650Vrms)
7) Always clean the LCDpanel with a soft cloth material.
8) Use care whenhandling the wires or connectors of the inverter circuit. Damaging the wires
may cause a short circuit.
9) Protectthe panel fromESD to avoid damaging the electronic circuit (C-MOS).
1-1. WarningsandCaution
1) CAUTION :These servicing instructions are for use by qualified service personnel
only.
2) To reduce the risk of electric shock, do notperformany servicing other than that
contained in the operatinginstructionsunless you are qualified to do so.
3) WARNING!!:An isolation transformer should be used duringany service to avoid
possible shock hazard, because of live chassis. The chassis of this receiver is directly
connected to the ac power line.
The replaceable fuse could be in the neutral of the mains supply. When replacing the fuse,
the mains shall be disconnected forde-energize the phase conductors.
(*Except AC ADAPTOR, Because it doesnot carry out replacing an internal fuse.)
4) CARRYING THE TV : Be sure to follow these guidelines to protect your propertyand
avoid causing seriousinjury :
•Carry the TV with an adequate numberof people; larger size TVs require two or more
people.
•Correct handplacement while carrying the TV is very importantfor safety and to
avoiddamages.
5) SAFETY-RELATED COMPONENT WARNING!! : Components identified by shading
and ! mark on the exploded views, and in the parts list are critical for safe operation.
Replace these components with Sonyparts whose part numbers appear as shown in
this manual or in supplements published by Sony. Circuit adjustments that are critical
for safe operation are identified in this manual.Follow these procedures whenever
critical components are replaced or improperoperation is suspected.
6) IMPORTANT REMINDER FOR TV MAINBOARD REPLACEMENT :
It is mandatory for service centers to confirm the TV‘s system information after each repair
carriedout with Mainboard replacement.
SAFETY NOTES
SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE 5
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10)During the repair, DO NOT leave the Power On or Burn-in period for more than1hour
while the TV is face down on a cloth. Refer Figure 1
Figure 1.
1-2-2. Caution for OLEDPanel
1) Handling
When repairing the TV set, be sure you are grounded by using a wrist band.
*Do not press on the panel or frameedge to avoid the risk of electric shock.
*Do not scratch or press on the panel with any sharp objects.
*Do notleave the module in high temperaturesor in areas of high humidity foran extended
period of time.
*Do not expose the panel to direct sunlight.
*Avoid contact with water. It may cause a short circuit within the module.
*Disconnect the AC power when replacing.
*Always clean the panel with a soft cloth material.
*Use care whenhandling the wires or connectors.Damaging the wires may cause a short.
*Protectthe panel fromESD to avoiddamaging the electronic circuit.
*Do not recommendpower-on in the conditions which laid face down the panel, in repair activity.
Refer Figure 1.
*Whentransportingby hand, do notput stresson the panel and the frame around the screen.
Referto the panel handling chapter of each Service manual,
or the "Transporting"informationof the Reference Guide of each model for how to hold it.
2) OLEDScreen
•Although the OLED screen is made with high-precision technology and 99.99% or more of the
pixels are effective,black dots may appear or bright points of light (white, red,blue, or green)
may appear constantly on the OLED screen. This is a structural propertyof the OLED screen
and is nota malfunction.
•Do notpush or scratch the frontfilter,or place objects on top of this TV set. The image may
be uneven or the OLED screen may be damaged.
•The screenand cabinet get warm when this TV set is in use. This is nota malfunction.
3) Precautionsto Protect the Screenfrom Damage
Image retention
OLED TV’s are susceptible to image retention (burn-in)due to the characteristicsof the
materials used. Image retentionmay occur if images are displayed in the same location on the
screen repeatedly or over extendedperiods of time. This is not a malfunctionof the TV. Avoid
displaying images that may cause image retention.
The following are examples of images that may cause image retention:
•Content with black bars either on the top andbottomand/or the left and right sides of the
screen. (forexample,Letterboxed, 4:3 screen, Standard definition)
•Static images such as photos.
•Video games that might have static content in some part of the screen.
•On-screen menus, programguides, channel logos etc.
•Static content fromapplications.
•On-screen tickers, such as those used fornews and headlines.
SAFETY NOTES
SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE 6
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To reduce the risk of image retention:
•Fill the screen by changing [Wide mode] to eliminate the black bars. Select [Widemode]
other than [Normal].
•Turn offthe OSD (On ScreenDisplay) by pressing the DISPLAYbutton, and turn off the menus
fromconnected equipment.Fordetails, referto the instruction manuals for the connected
equipment.
•Avoid displaying static images with bright colours (including white), clocks or logos on any
portion of the screen.
•Set the picture settings based on the ambient conditions. The Standard Picture is recommended
for home use and when viewing content that oftendisplays the station logos, etc.
The TV has following featuresto help reduce/ prevent image retention. Press the HOME button,
then select [Settings]– [Picture & Display] – [Expert panel settings]– the desired option.
Panel refresh
Panel refresh will automatically run to adjust the uniformityof the TV screen afterit has
been in use for long periods of time.
Panel refreshcan also be performedmanuallyand should only be used if image retentionis
very noticeable or you see the following message: [Panel refreshdid not finish...]
Caution:
•The Panel refreshfunction may affect the panel. As a reference,perform the Panel refreshonly
once a year, do notperformit more thanonce a year as it may affectthe usable life of the panel.
•Panel refresh takes aboutonehour to complete.
•A white line may be displayed on the screenduring the Panel refresh, this is not a malfunction
of the TV.
•Panel refresh will only work when the room temperatureis between 10
ºC and 40 ºC.
Pixelshift
Automatically moves the image on the screen to prevent image retention.
Other feature
The screen brightness is automatically reduced when displaying still
images, clocks, bright colours or logos etc.
IMPORTANT REMINDER FOR OLED PANEL REPLACEMENT
When carryingout OLEDpanel replacement,it is mandatory of a service
center to confirmand record Panel ON time & Panel Refreshtimes.
It is because they are indispensableinformationin order to clarify
responsibility for image retention after panel replacement.
Please referto the chapter of SELF DIAGNOSIS FUNCTION in this service
manual to find outhow to confirmthe Panel ON time & Panel Refreshtimes
in service mode.
1-3. Caution_for_Board_handling
Symptom : The following problems will occur due to handling of the IC mounted on the board
・Solder crack due to substrate handling (stress)
・IC breakdown due to static electricity (ESD)
When repairing the TV at the customer‘s home or service station or Repair of defect board,
please pay attention to the handling of the board
※Substrate that needs attention for handling
・Main Board（B** -Board）
・Backend Board（D** -Board）
SAFETY NOTES
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8
ESD wrist-strap
ESD wrist-strap to be checked daily.
Use Multi-meter to make sure resistance of ESD wrist-strap is OK.
(R=750K Ohms to 35Mega Ohms)
ESD cushion/sheet
Please use a bag containing the board or a special seat
※Things to prepare in advance 1) Caution for Board handling(Stress)
Be sure to observe the following contents.
③Handle with care. Do not swing.
①Hold the board with both hands
②Do not hold/push Heat-Sink
SAFETY NOTES
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④Regardless of Good board or Defective board, always put it
on ESD cushion/sheet slowly.
⑤Do not stack up
⑥Keep vertical position and put in/take out from Box.
Always put in to ESD bag then place into Box/Container Box.
⑦Do not hold Heat-Sink when take out or install it..
2) Caution for Board handling(ESD)
Be sure to observe the following contents.
①When take off Rear-Cover,
do not touch to board ②Use ESD wrist-strap
SAFETY NOTES
SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE 9
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10
※Installation example of wrist-strap
Please connect the clip to the metal part of the chassis of the TV with the
wristband grounded. Below is a grounding example of each model.
＜K*-55/65A9F＞
＜K*-65Z9F＞
※Caution
ESD wrist-strap to be checked daily.
Use Multi-meter to make sure resistance of ESD wrist-strap is
OK.(R=750K Ohms to 35Mega Ohms)
1
0
③When holding board, do not hit/touch to Plastic part(s)
④After take defective board out from TV, put it into ESD bag.
Do not place on floor mat/carpet direct. And, always put it on
ESD cushion
SAFETY NOTES
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11
1-4. Caution About the Lithium Battery
1) Dangerof explosion if batteryis incorrectly replaced. Replace only with the same or
equivalent type.
2) Outer case brokenbattery shouldnot contact to water.
1-5. Safety Check-Out
Aftercorrecting the original service problem, performthe following safetychecks
before releasing the set to the customer:-
1)Check the area of your repair for unsoldered or poorly soldered connections. Check the
entire board surface for solder splashes and bridges.
2)Check the inter board wiring to ensure that no wires are pinchedor contact high-
wattage resistors.
3)Check all control knobs, shields, covers, ground strapsand mounting hardware have
been replaced. Be absolutely certain you have replaced all the insulators.
4) Look for unauthorized replacement parts, particularly transistors that
were installed during aprevious repair.Point them out to the customer and recommend
their replacement.
5) Look for parts which, though functioning show obvious signs of deterioration.Point them
out to the customer and recommend their replacement.
6) Check the line cords for cracks and abrasion.Recommend the replacement of any such
line cord to the customer.
7) Check the antenna terminals, metal trim, metalized knobs, screws and all other exposed
metal parts for AC leakage.Check leakage test as described next.
8. For safety reasons, repairing the Power board and/or Inverter board is prohibited.
1-6. Leakage Test
(To protect electric shock when customer touch the terminal.)
Leakage current can be measured by V: Voltmeter or oscilloscope (r.m.s. or peak reading)
Stabilized power supply instrument and isolated voltage transformer:
Use too much current capacity and isolated voltage transformer does not need to use
stabilized power supply equipment.
Specification of RMS volt meter: Input resistance > 1 Mohm, Input capacitance < 200 pF,
Frequency range: 15 Hz –1MHz . Refer Figure 2. Isolated type volt -meter (FLUKE 8921A
etc *1)
*1 Not use FLUKE 8920A that connected to protective earth by diode
# Leakage current of measurement instrument is less than 10μArms when under test
equipment AC plug is opened
# Set up the following condition and turn on the set. Applied voltage: Nominal input voltage
(Description on Nameplate)
# Measure the leakage current between one phase conductor and neutral for terminal A and
terminal B.
Read rms value, and then calculate to peak value PEAK VALUE =√2 RMS VALUE
Comply with the following requirement
Class II equipment (2-pinplug): for each terminal, the worst valueof measurementmust
not exceed AC 350uA peak).
Note: including AC adaptor,AC adaptor/DC operated unit combination
Figure 2 – Measuring network
for LeakageCurrent
SAFETY NOTES
SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE 11
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1-7. Howto Find a GoodEarth Ground
1)A cold-water pipe is a guaranteedearth ground; the cover-plate
retaining screw on most AC outletboxes is also at earth ground.
2)If the retaining screw is to be used as yourearth ground, verify that it is
at ground by measuring the resistance between it and a cold-water pipe
with an ohmmeter.The reading should be zero ohms.
3)If a cold-water pipe is not accessible, connect a 60- to 100-watt trouble-
light (not a neonlamp) between the hot side of the receptacle and the
retaining screw. Try both slots, if necessary, to locate the hot side on the
line; the lamp should light at normal brilliance if the screw is at ground
potential(see Figure 3).
Figure 3. Checking for earth
ground.
The servicing of these boards requires special precautions.It is
stronglyrecommendedto use Lead Free Solder material in order to
guaranteeoptimal quality of new solder joints.
SAFETY NOTES
SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE
1-8. Lead Free Information
The circuitboards used in these modelshave been processed using
Lead Free Solder. The boards are identified by the LF logo located
close to the board designation.
Figure 4: LF Logo Figure 5: LF logo on circuit board
12
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SELF DIAGNOSTIC FUNCTION
The units in this manual contain a self-diagnosticfunction.If an error occurs, the Smart Core Red LED willautomaticallybegin to flash. The number
of times the LED flashes translatesto a probable source of the problem.
Adefinitionof the Smart Core Red LED flash indicators is listed in the instruction manual for the user’s knowledge and reference.
If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence datastored in memory to reveal past
problems and how often these problems occur.
DIAGNOSTICTEST INDICATORS
Whenan error occurs, the Smart Core Red LED will flash aset number of times to indicate the possible cause of the problem. If there is
more than one error, the LED will identify the first of the problem areas.
Result for all of the following diagnostic items are displayed on screen. If the
screen displays a “0”, no error has occurred .
Self Diag.Quick Reference (LED blinking)
Notes :
Blue italic: detect at startup sequence only.
<G>: Power Supply board, <B>: Main board,
<T>: T-con board, <LD>: LD board,
<P>: Panel module,
<S>: Speaker,
Smart Core RED LED
blinking count AS
2x <B/G> Main 12V over voltage [MAIN_POWER]
3x
<B/G> Main 5.0V failure [DC_ALERT]
<B/S/G> Audio amp. protection [AUD_ERR]
4x <P/T/B/G>TCON internal error/TCON I2C communication failure [LD_ERR]
<P/T/G/B> EVDD failure [BCM_ERR]
5x
<P/T/G/B> Panel ID EEPROM I2C No ACK
(Also panel power failure is a suspect) [P_ID_ERR]
<T/B>Data corruption in EEPROM[P_ID_ERR]
6x <P/G/B> EVDD over voltage [BACKLIGHT_ERR]
7x <P/B> Over temperature protection [TEMP_ERR]
8x <B> 4KBE failure (4KBE WDT) [4KBE_ERR]
SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE 13
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14
Self Diag. Quick Reference (Not LED blinking) –Record Only
Error Item AS
TU_DEMOD -
TCON ERR <TSP> TSP device I2C communication failure
*AS/AT model is shutdown by I2C communication failure
[LD_ERR]
AUD_ERR_I2C <B> Audio amp I2C communication failure
TEMP_ERR_I2C <B/H> Temp sensor I2C communication failure
TU_DEMOD_I2C <B> Tuner & Demodulator I2C communication failure
EARC_ERR_I2C -
8KBE_COM_ERR -
8KSHV_ERR -
AMB_ERR_I2C -
Notes :
<B>: Main board, <T>: T-con board,
<H>: LED / IR & sensor board,
<TSP>: TSP board
SELF DIAGNOSTIC FUNCTION
SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE 14
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15
Entry (Self Diagnosis Display)
-Go to the standby by a remote.
-Push the buttons sequentially:
<Display><5><Vol-><Power>
Exit
-If you want to finish service mode app, do AC OFF/ON
→*Service mode app is disable perfectly
-If you want to move home menu, push <HOME>button
→*Service mode app do background(not disable perfectly)
Self Diagnosis Display [Example]
002 MAIN POWER 050121081135 041231123456 031111182547 003
003 DC ALERT 000000000000 000000000000 000000000000 000
003 AUD ERR 000000000000 000000000000 000000000000 000
003 AUD ERR I2C 000000000000 000000000000 000000000000 000
003 TU DEMOD I2C 000000000000 000000000000 000000000000 000
003 AMB ERR I2C 000000000000 000000000000 000000000000 000
004 LD ERR 000000000000 000000000000 000000000000 000
004 BCM ERR 000000000000 000000000000 000000000000 000
005 TCON ERR 000000000000 000000000000 000000000000 000
005 P ID ERR 000000000000 000000000000 000000000000 000
006 BACKLIGHT ERR 000000000000 000000000000 000000000000 000
007 TEMP ERR 000000000000 000000000000 000000000000 000
007 TEMP ERR I2C 000000000000 000000000000 000000000000 000
008 4KBE ERR 000000000000 000000000000 000000000000 000
SELF CHECK
00034 00231 00034
Back
[Home]Exit [Up/Down]Scroll
Self Diagnosis Service Menu
SELF DIAGNOSTIC FUNCTION
SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE 15
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16
Self Diagnosis Display
;
SELF CHECK
<<
002 MAIN POWER 000000000000 000000000000 000000000000 000
003 DC ALERT 000000000000 000000000000 000000000000 000
003 AUD ERR 150101000018 150101000018 150101000018 003
003 AUD ERR I2C 150101000218 150101000223 150101000105 003
003 TU DEMOD I2C 000000000000 000000000000 000000000000 000
003 AMB ERR I2C 000000000000 000000000000 000000000000 000
004 LD ERR 000000000000 000000000000 000000000000 000
004 BCM ERR 000000000000 000000000000 000000000000 000
005 TCON ERR 150101000504 000000000000 000000000000 001
005 P ID ERR 000000000000 000000000000 000000000000 000
006 BACKLIGHT ERR 000000000000 000000000000 000000000000 000
007 TEMP ERR 150101000200 150101000002 000000000000 002
007 TEMP ERR I2C 000000000000 000000000000 000000000000 000
008 4KBE ERR 000000000000 000000000000 000000000000 000
Back
00005 00414 00002
[Home]Exit [Up/Down]Scroll
Smart Core Red LED
blinking count
Error Item Error count
Total Operation Time [hr] –Boot Count –Panel Operation Time [hr]
Error
timestamp
for last
recorded
error
Error
timestamp
for 2nd last
recorded
error
Error
timestamp
for 3rd last
recorded
error
Format of error timestamps
YYMMDDhhmmss (in UTC)
Example:
120823132523 -> Aug 23 2012 13:25:23 UTC
* Only when time is set, an error timestamp
is saved.
Panel Operation Time clear
<7> -> <0>
Timestamps and Error Count clear
<8> -> <0>
Total Operation Time and Boot Count clear
<9> -> <0>
•Panel Operation Time is recorded every
30 min, but Total Operation Time is recorded
every 1hour.Therefore, the panel op.time
might become larger than the total op.time.
SELF DIAGNOSTIC FUNCTION
SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE 16
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17
Self Diagnosis Display
Enter Self Diagnosis
Display.
Push ‘Green button’ on
remote controller.
Then, the information is
displayed on the upper
right corner.
Panel ON time[hour] /Panel Refresh times[times]
Ex) 100 / 20
;
SELF CHECK
<<
002 MAIN POWER 000000000000 000000000000 000000000000 000
003 DC ALERT 000000000000 000000000000 000000000000 000
003 AUD ERR 150101000018 150101000018 150101000018 003
003 AUD ERR I2C 150101000218 150101000223 150101000105 003
003 TU DEMOD I2C 000000000000 000000000000 000000000000 000
003 AMB ERR I2C 000000000000 000000000000 000000000000 000
004 LD ERR 000000000000 000000000000 000000000000 000
004 BCM ERR 000000000000 000000000000 000000000000 000
005 TCON ERR 150101000504 000000000000 000000000000 001
005 P ID ERR 000000000000 000000000000 000000000000 000
006 BACKLIGHT ERR 000000000000 000000000000 000000000000 000
007 TEMP ERR 150101000200 150101000002 000000000000 002
007 TEMP ERR I2C 000000000000 000000000000 000000000000 000
008 4KBE ERR 000000000000 000000000000 000000000000 000
Back
00005 00414 00002
[Home]Exit [Up/Down]Scroll
１2 3
456
789
How to confirm
-Panel ON time
-Panel Refresh times
Green button
SELF DIAGNOSTIC FUNCTION
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18
Retry Limitation by Remote / Power Key
Smart Core
Red LED
blinking count
Error Name Retry Permission Times *1 Note
2x MAIN_POWER STDWN_RTRY_LIMIT_MAINPOWR = 1
3x
DC_ALERT (5V) STDWN_RTRY_LIMIT = 2
AUD_ERR STDWN_RTRY_LIMIT = 2
4x
LD_ERR STDWN_RTRY_LIMIT = 2
BCM_ERR STDWN_RTRY_LIMIT = 2
5x P_ID_ERR STDWN_RTRY_LIMIT = 2
6x BACKLIGHT STDWN_RTRY_LIMIT = 2
7x TEMP_ERR STDWN_RTRY_LIMIT = 2
8x 4KBE_ERR STDWN_RTRY_LIMIT = 2
Number of off/on action during the
error shutdown is recorded to
STDWN_OFFON_CNT.
*1) If STDWN_OFFON_CNT <= STDWN_RTRY_LIMIT, and STDWN_OFFON_CNT_MAIN_POWER <= STDWN_RTRY_LIMIT_MAINPOWR,
you can turn the set on by a remote/power key. At this time, if the error occurs again, the STDWN_OFFON_CNT is incremented by 1.
*2) When the main micon operates normally for STDWN_OFFON_CLR = 60 minutes, STDWN_OFFON_CNT and STDWN_OFFON_CNT_MAIN_POWER
are cleared.
Number of off/on action for
MAIN_POWER shutdown is recorded to
STDWN_OFFON_CNT_MAIN_POWER.
SELF DIAGNOSTIC FUNCTION
SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE 18
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TROUBLESHOOTING
19
Triage Chart
Before you make the service call…
1. Confirm the symptom from the customer.
2. Select that symptom from the chart.
3. Bring all the boards and cables listed for that symptom.
4. Follow the troubleshooting charts in the technical guides to isolate the board.
5. Chart Color Code
RED DOT: Most likely defective part
BLUE TRIANGLE: Secondary possible defective part
GREEN SQUARE: Tertiary possible defective part
BLACK TEXT: Board that may correct the symptom
Chassis : AS Segment
No
Power
Remote Network Audio
Smart
Core
Bluetooth
(BT)
2345678
TU_DEMO
D
TU_DEMO
D_I2C
TCON_ER
R
FRCTC_I2
C
AUD_ERR
_I2C
4KPQ_ER
R_I2C
TEMP_ER
R_I2C
EARC_ER
R_I2C
8KBE_CO
M_ERR
AMB_ERR
_I2C
No White
Power LED &
does not
reponse to
remote (Dead
Set)
Stationary
colored lines
or dots
No video One
of Inputs
NO RF input
No video all
Inputs
No Remot e
Cannot
connect to
Wireless
Network
No Audio
Smart Core no
LED (Set is
still alive)
Bluetooth /
One Step
Remote (OSR)
can't connect
B* Board ■■■
●
  ▲     
G* Board ■■▲ 
H* Board 
●
 
Actuater
(Panel module)

Speaker
(Sub woofer)

Wifi & BT Module  
V By One FFC   
Tcon
(Panel module)
▲■
OLED Panel
(Panel module)
●
▲▲■
TSP Board 
Power Power
Panel
module
Panel
(Communicati
on)
Panel
Power TEMP 4KBE
Audio
Tcon
Power Tcon
Problem
Reference
Symptoms - Shutdown. Power LED
blinking red diagnostics sequences
Symptoms - no shutdown
Error log record only
Video
- missing or distorted
Main Board
Power Board
Receiver Board
SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE 19
SYSSET
2021/02/0423:38:48(GMT+09:00)

20
1.1 No Power
No Power
Check STBY 3.3V
C1708
near CN1700 on
BM5S21 board
Harness
Power Board
Replace
Between Power Board to
BM5S21 Board
Harness
BM5S21
Board
NG
OK
NG
OK
u-Com Failure
DDCON/LDO
Main Device Failure
TROUBLESHOOTING
SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE 20
SYSSET
2021/02/0423:38:48(GMT+09:00)