Sony BRAVIA XR-65X95K User manual

SERVICE MANUAL (COMMON)
ORIGINAL MANUAL ISSUE DATE: 2022.04 GR2VH CHASSIS
Segment : FM
9-888-904-01
LCD TV
LCD MONITOR
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.
Sony EMCS (M) Sdn. Bhd.,HES-M
©2022.04
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Version Date Subject
1. 2022.04 1st Issue
REVISION HISTORY
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THIS SERVICE MANUAL CONTAINS COMMON INFORMATION FOR BELOW REGIONS AND MODELS:
REGION
AMERICA CHINA ASIA
MODEL
XR-65X95K XR-75X95K XR-85X95K
XR-65X95EK XR-75X95EK XR-85X95EK
XRM-65X95K XRM-75X95K XRM-85X95K
MODEL LISTS
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Title Page
SAFETY NOTES
5
SELF DIAGNOSIS FUNCTION
12
TROUBLESHOOTING
18
SERVICE ADJUSTMENT
71
DIAGRAMS
82
HANDLING GUIDE
86
TABLE OF CONTENTS
Note: Pictures provided in this manual may have difference from actual sets
Please refer Service Manual –Unique for below information :
Tools and Equipments
FFC Precautions
Disassembly and Removal Caution
Wire Dressing
Circuit Board Location
Exploded Views and Part Lists
Smart Core
Appendix
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Whenever a TV Mainboard is replaced, the correct TV ModelandSerial number must be
reinserted into memory.
This is a MANDATORY procedure thateach service center must apply.
Please refer to the chapter of ADJUSTMENT in this service manual to findouthow to set the
modelnumberand serial number in service mode.
1-2. 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 frame edge to avoid the risk of electric shock.
2) Do not scratch or press on the panel with any sharp objects.
3) Do notleave the module in high 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.
7) Always clean the LCD panel with asoft cloth material.
8) Handle the wires or connectors of the backlight circuit with care.Damaging the wires may
cause ashort circuit.
9) Protect the panel from ESD 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 notperform any servicing other than thatstated in
the operatinginstructionsunless you are qualified to do so.
3) WARNING!!: An isolation transformer should be used duringany service to avoidpossible
shock hazard, because of live chassis. The chassis of this receiver is directly connected to
the ac power line.
The replaceable fuse should be in the neutral of the mains supply. When replacing the fuse,
the mainsmust be disconnected to de-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 property and
avoid causing seriousinjury:
•Carry the TV with an adequate number of people; larger size TVs require two or more
people.
•Correct handplacement while carrying the TV is very important for safety and to
avoiddamages.
5) SAFETY-RELATED COMPONENT WARNING!!: Components identified by shadingand !
mark on the exploded views, and in the parts list are critical for safe operations. 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 operations are
identified in this manual.Follow these procedures whenever critical components are replaced
or improperoperation is suspected.
6) IMPORTANT REMINDER FOR TV MAIN BOARD REPLACEMENT:
It is mandatory for service centers to confirm the TV‘s system information after each repairis
carriedout with Main board replacement.
SAFETY NOTES SELF DIAGNOSIS FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE 5
SAFETY NOTES
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10)During the repair, DO NOT leave the POWER ON or Burn-in period for more than 1 hour
while the TV is facing down on a cloth. Refer Figure 1.
Figure 1.
6
To reduce the risk of image retention:
• Fill the screen by changing [Wide mode] to eliminate the black bars. Select [Wide mode]
other than [Normal].
• Turn off the OSD (On ScreenDisplay) by pressing the DISPLAYbutton, and turn off the
menus from connected equipment. Fordetails, refer to the instruction manuals for the
connected equipment.
• Avoid displaying static images with bright colours (including white), clocks or logos on
anyportion 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 often displays the station logos,
etc.
The TV has following features to 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 uniformity of the TV screen after it has
been in use for long periods of time.
Panel refresh can also be performed manuallyand should only be used if image retention is very
noticeable, or you see the following message: [Panel refresh did not finish...]
Caution:
• The Panel refresh function may affect the panel. As a reference, perform the Panel refresh only
once a year, do notperform it more thanonce a year as it may affect the 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 temperature is between 10ºC and 40 ºC.
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 SELF DIAGNOSIS FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE
SAFETY NOTES
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.
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①Hold the board with both hands.
②Do not hold/push Heat-Sink.
③Handle with care. Do not swing.
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.
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SAFETY NOTES
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⑦Do not hold Heat-Sink when dis-assembly or assembly it.
8
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 into ESD bag then place into Box/Container Box.
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.
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SAFETY NOTES
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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.
※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*-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).
9
1-4. Caution About the Lithium Battery.
1) Danger of explosion if battery is incorrectly replaced. Replace only with the same or
equivalent type.
2) Outer case broken battery should not contact to water.
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SAFETY NOTES
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1-5. Safety Check-Out
After correcting the original service problem, perform the following safety checks
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 show obvious signs of deterioration even though functioning.Point
them to the customer and recommend for 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 measurement must
not exceed AC 350uA peak).
Note: including AC adaptor, AC adaptor/DC operated unit combination.
Figure 2 – Measuring network for Leakage Current
10
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SAFETY NOTES
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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 neon
lamp) 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 strongly recommended to use
Lead Free Solder material in order to guarantee optimal quality of new solder joints.
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
11
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SAFETY NOTES
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12
SAFETY NOTES SELF DIAGNOSIS FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE
The units in this manual contain a self-diagnostic function. If an error occurs, the Smart Core Red LED willautomaticallybegin to flash. The number of times the LED flashes
translates to a probable source of the problem.
Adefinition of 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 data stored in memory to reveal past problems and how often
these problems occur.
DIAGNOSTIC TEST INDICATORS
Whenan error occurs, the Smart Core Red LED will flash a set 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)
SELF DIAGNOSIS FUNCTION
Smart Core RED
LED blinking count FM
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/LD/B/G> LED driver failure/LED voltage protection [LD_ERR]
<LD/P/B>Error detection of the I2C communication between the Main device and
the LD IC.[BCM_ERR]
5x <P/T/G/B> Panel ID EEPROM I2C No ACK
(Also, panel power failure is a suspect) [P_ID_ERR]
6x <P/G/B> Backlight failure [BACKLIGHT_ERR]
7x <P/B> Over temperature protection [TEMP_ERR]
8x <B> 4KBE failure (4KBE WDT) [4KBE_ERR]
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
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SELF DIAGNOSIS FUNCTION
Notes :
<B>: Main board, <T>: T-con board, <H>: LED / IR & sensor board,<8>: 8KBE Board
Error Item FM
TU_DEMOD None
T-CON ERR <T> T-CON device I2C communication failure
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 None
8KBE_COM_ERR None
8KSHV_ERR None
AMB_ERR_I2C <B/H> Ambient sensor I2C communication failure
Self Diagnosis Quick Reference ( Not LED blinking) –Record Only
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SAFETY NOTES SELF DIAGNOSIS FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE
SELF DIAGNOSIS FUNCTION
Entry (Self Diagnosis Display)
1. Go to TV standby condition by remote commander.
2. Press keys on remote sequentially as right table.
3. You can see Service menu on display.
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] >
(displaying item is depends on each Model, refer to previous page)
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 T-CON 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
Conventional Key Sequence New Key Sequence from Valhalla2.1
(to Support “Simple Remote”)
<Display> or <i+(info)>
⇒<5>
⇒<Vol->
⇒<Power>
<Home>
⇒<Enter(DpadCenter)>
⇒<Vol->
⇒<Power>
Self Diagnosis Service Menu
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SAFETY NOTES SELF DIAGNOSIS FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE
SELF DIAGNOSIS FUNCTION
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 T-CON ERR 150101000504 000000000000 000000000000 001
005 P ID ERR 000000000000 000000000000 000000000000 000
006 BACKLIGHT ERR000000000000 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
Panel Operation Time is recorded every 30 min,
but Total Operation Time is recorded every 1 hr.
Therefore, the panel op. time might become larger
than the total op. time.
Smart Core Red LED
blinking count
Error Item Error count
Total Operation Time [hr]
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.
Error
timestamp
for last
recorded
error
Error
timestamp
for 2nd last
recorded
error
Error
timestamp
for 3rd last
recorded
error
< Self Diagnosis Display [Example] >
Boot Count
Panel Operation Time [hr]
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SAFETY NOTES SELF DIAGNOSIS FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE
SELF DIAGNOSIS FUNCTION
Self Diagnosis Display ( To Clear History )
Function Conventional Key Sequence New Key Sequence from Valhalla2.1
(to Support “Simple Remote”)
Panel Operation Time clear <7> ⇒<0> <→> x 9times ⇒<Enter(DpadCenter)>
Timestamps and Error Count clear <8> ⇒<0>
<←> x 9times ⇒<Enter(DpadCenter)>
Total Operation Time and Boot Count clear <9> ⇒<0>
;
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
< Self Diagnosis Display [Example] >
【Notice】
Please move cursor position
other than “Back”
by <↑> /<↓>
before do “New Key Sequence”
to avoid misoperation.
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SAFETY NOTES SELF DIAGNOSIS FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE
SELF DIAGNOSIS FUNCTION
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 micro 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.
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SAFETY NOTES SELF DIAGNOSIS FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE
Triage Chart
TROUBLESHOOTING
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:
: Most likely defective part
: Secondary possible defective part
■: Tertiary possible defective part
BLACK TEXT: Board that may correct the symptom
Reference
Symptoms -Shutdown. Power LED
blinking red diagnostics sequences
Symptoms -no shutdown
Error log record only
No
Power
Video
-missing or distorted Remote Network Audio Smart
Core
Bluetooth
(BT)
2 3 4 5 6 7 8 TU_
DEMOD
TU_
DEMOD_
I2C
TCON_
ERR
FRCTC
_I2C
AUD_
ERR_
I2C
4KPQ_
ERR_
I2C
TEMP_
ERR_
I2C
EARC_
ERR_
I2C
8KBE_
COM_
ERR
AMB_
ERR_
I2C
No White
Power LED &
does not
response to
remote
(Dead Set)
Stationary
colored
lines or
dots
No video
One of
Inputs
NO RF
input
No video
of
Camera
No video
all Inputs
No
Remote
Cannot
connect to
Wireless
Network
No
Audio
Smart Core
no LED
(Set is still
alive)
Bluetooth /
One Step
Remote
(OSR) can't
connect
Main Board ■ ■ ■    ▲       
Power Board ■ ■ ■ ▲
Receiver
Board ● 
Speaker 
Wi-fi & BT
Module
 
LD* Board ▲▲
V By One
FFC    
Tcon   ■
LCD Panel ●▲▲■■
Camera
(bundle or
accessory)

Problem
Power Power Panel
Panel
(Communication)
Panel
(Backlight) TEMP 4KBE
Audio LD Tcon
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SAFETY NOTES SELF DIAGNOSIS FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE
TROUBLESHOOTING
No Power
Check STBY 3.3V
C1708
near CN1700 on
BM5S22 board
Harness
Power Board
Replace Harness
between Power Board and
BM5S22 Board
BM5S22 Board
NG
OK
NG
OK
u-Com Failure
DDCON/LDO
Main Device Failure
1.0 No Power
SYSSET
2022/03/3000:15:03(GMT+09:00)

20
SAFETY NOTES SELF DIAGNOSIS FUNCTION TROUBLESHOOTING SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE
TROUBLESHOOTING
1.2 No Power U – com Failure P-on u-com control signal path summary
BM5S22 Board LCD Model when mounted on IC420
P-on u-com
IC420
Power Board
DDC : 0.8V_M5_CORE (IC804)
DDCs : 5V_MAIN&5.0V_VBUS&5V_AUDIO (IC600 or IC610),
1.0V_TU_P (IC603),
1.8V_M5 (IC807), 1.0V_M5 (IC808),
0.8V_M5_CPU (IC810), 0.8V_M5_GPU (IC811)
1.8V_BE_DDC (IC4800)
5.0V_VBUS_CAMERA(IC611)※Internal camera model only
LDOs : 3.3V_MAIN_H (IC403)
FET SW : 3.3V_TU_P (Q602/Q603)
SOC Muffin 5 (IC1000)
P_ON_#1
PGOOD_1
P_ON_#2
OPWRSB
R457
#pin4
#pin16
#pin21
#pin18
#pin17
#pin20
#pin6
3.3V_STBY
POWER_ON
ORESETB
#pin19
BL_ON
DC_OFF_DET
#pin10 P_ON_HL FET SW : 12.7V_LNB (Q604/Q605)
SW IC : 3.3V_TU_P (Q609 –IC604)
USB VBUS SW (IC3801-IC3806)
#pin23
ADC port
#pin22
R462
#pin14
ADC port
X_BL_MUTE
#pin7
12.7V_MAIN R450
#pin8
R443
LD-Board
VDD
12V_MON
GND
TYPE_DET
CAMERA_PWR_ON
DC_MON
GND
GND
#pin13
GND
3.3V_STBY
R445 R446
DDCs : 0.9V_BE_DDC_1 (IC4802), 0.9V_BE_DDC_2 (IC4803),
0.8V_BE (IC4809), 0.7V_BE (IC4810)
SYSSET
2022/03/3000:15:03(GMT+09:00)