LG WT5101HW Reference manual

•Subject: Upgrade Display PCB S/W
* Bulletin Registration Date: August. 31, 2012 * Effective from Date: August. 31, 2012
Service Bulletin
WASHING MACHINE
Bulletin Number:WW/M20120347
•Applicable for models: (Customer models in alphabetical or numerical order per subsidiary)
General information
<SVC Note >
•Special Claim code : RK (= Rocky S/W Update)
•Repair code : Soft (= Install or upgrade software)
Subsidiary Customer Model Subsidiary Customer Model
LGEAI WT5101HW WT5101HV
WT5001CW LGECI WT5101HV
WT5001CW
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Applicable in warranty: YES NO Also applicable outside YES NO
of warranty:
Applicable only with symptoms YES NO
Below:
Applicable with every repair: YES NO
Applicable Serial Number : : 003xxxxxxxxx ~ 111xxxxxxxxx
-
-
-
-
Technical information
CONDITION:
CORRECTION:
Displaycontrol board algorithm does not adequatelycontrol spin speed for certain out
of balance conditions.
Update the software on the DISPLAY PCB of the affected models as shown in the
MODEL CHART. Unplug the washer, access the controls and disconnect the harness
between the DISPLAY and main PCBs. Connect the tool to the DISPLAY PCB HARNESS
and follow these instructions.

3. Solution
- For customers washer servicecomplaints,the SVC tech. should upgrade display PCB
Software. You must confirm the serial number of product.
If the product is made before 2011. Nov.,you will haveto update the display PCB Software.
- Only apply S/W update to the product with below serial No. (104 1 is year, 2011, 04 is month)
1. Wehaveto check Display PGM versionbecause the program of WT5101,5001 has changed.
- To verify the S/W version, enter Test mode.
To Enter Test mode : Power + Wash /Rinse+ Soil Level (Push those buttons at the same time)
Then push START button,
Pushing START button the first time, display window shows “T1” and “Main version” display .
Pushing the START button again will display, “T2” and “Display version”.
Service Bulletin
WASHING MACHINE
2. After Updating the followinginformation(S/W version)appears on the display in the test mode.
PCB Model PCB P/No. S/W file in Jig Old S/W
Version
New S/W
Version Check Sum
Display WT5101** EBR62267104 0000d93f.t45 68,69,71,
78,96,101 131 d93f
WT5001** EBR62267105 00005144.t45 71,95,102 130 5144
Model Serial No.
WT5101HW
WT5101HV
WT5001CW 003xxxxxxxxx ~ 111xxxxxxxxx
Test mode Push Start button
Verify S/W Version
※After updating , you should verify “Check sum” on display of Jig
※After updating , you should verify S/W version in the Test mode
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3. If you do not have PCB JIG,
you may replace old version of Display PCB with new version of Display PCB.
※Refer to Appendix page about “Flow chart for S/W update”
※Although SVC Tech. replace Display PCB, he should input special code “RK”.

. Using the Download jig
Service Bulletin
WASHING MACHINE
STEP2 : Make sure the washer power cord is unplugged before updating S/W
※CAUTION : IF YOU DON'T UNPLUG THE WASHER POWER CORD WHEN YOU UPDATE S/W,
IT WILL CAUSE FATAL DAMAGE TO PCB JIG.
STEP3 : Connect the power adapter to PCB jig (1,2,3)
▶After Step2, this should be displayed on the screen
1
2
3
[PCB Jig]
Confirm S / N
1. Front
2. PCB jig connector
3. AC adapter
Back
Dip Switch
Turn on 1, 4
This is direct mode.
To jig
STEP 1 : Copy files to PCB jig.
You must copy the files (0000d93f.t45, 00005144.t45)to the PCB jig.
→S/W files were already copied to the micro SD in PCB JIG
※When you update other programs for other models, file copy is also needed.
Failure to do this will cause the download to fail.
To PCB
To jig
To PCB
Main
Display 1 4
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* 3. Solution- 2
(WT5101**, WT5001**)
- Disassembling the Front panel, and Rear panels.
- Before you disassemble the front and real panel, lay down a protective surface on the washer’s
top to prevent scratches.
First remove the front panel screws (C,D,E), and rear panel screws (A,B)
then rest the front panel on the cloth protected washer top.
①Move the control panel in the direction of the arrow.
- Next, locate the Main and Display PCB assemblies.
To disassemble the PCB protect cover, remove the protect cover screw (F).
- Second,remove the protect cover by depressing the locking tabs.
1. Center Tabs (G) : Push back the protect slightly.
2. Side Tab (H) : Release protect cover by depressing the tabs. The cover can now be
removed.
Service Bulletin
WASHING MACHINE
Main, and Display PCB assembly
Ⓕ
Ⓕ
Ⓑ
①
②
Ⓐ
ⒺⒹⒸ
STEP4 : Disassemble the control panel by removing the rear control panel from the washing
machine.
ⒼⒽ
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-. This is PCB assembly, First of all we have to find the connector to update the S/W of display
PCB.
-. Afterlocating the electrical
connectorto the display PCB,
disconnect the connector &
connect the Jig
connector.
Service Bulletin
WASHING MACHINE
STEP5 : Connecting PCB jig to PCB Display download connector.
PCB Jig Housing
Ready for S/W update Connect the power adapter to PCB jig, the
jig screen should appear as pictured
below.
PCB Housing
+
< Caution >
Direct Mode
Check S/W
button
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Service Bulletin
WASHING MACHINE
STEP6 : Updating S/W
Tmp45 Mode
0000d93f.t45
▶This Message , Direct Mode can not Check PCB,
that download,
After you check this, push the button.
▶Push the button until the displayed program
file name is the one you intend to use. You must
verify the model number and select the correct
program software for that model in the service
bulletin for each model. Scroll the Push button on
the jig to locate the correct software.
Try connect 1
Status check
Progress
5 Percent
Success
d93f
▶After finishing, the program file name will be
displayed
This name must to be the same as check-sum.
Erasing mode
Baudrate Setting
31250
▶It is displayed the Program upgrade progress.
: 5 →10 →~→100 Percent
▶Push the button one more time.
It begins to upgrade program.
This Mode can’t
Check PCB
▶After finding the program matched to the Model,
Push the button for a Long Time (more than 3sec) ,
you will hear a beep sound and display the
“File Selected
0000d93f.t45”
File Selected
0000d93f.t45
▶Push the button on back of jig
to change mode step by step
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Service Bulletin
WASHING MACHINE
Step 7) Verify S/W version by test mode
- Test mode : Power + Wash / Rinse + Soil Level
(Push those buttons at the same time)
- Then push START button
* First Push , the display window “T1” and “Main version” display .
* Second Push, “T2” and “Display version”.
Test mode Push Start buttonVerify S/W Version
Step 8) Attach Software updated label on right side, between cabinet & T/Cover
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- Software Updated Label is provided with PCB JIG.
- Request labels to LGEAI before using all of provided them with PCB JIG
(SVC part # : 3850EA3100P)
Type 1. Type 2.
Type 1. Label is provided in PCB JIG ASM
Type 2. Label design is changed
: When SVC tech. order this label, he will receive type 2. label.

Service Bulletin
WASHING MACHINE
Step 9) Attach Caution label on Top cover
- Attach caution label on the front of top cover as below picture
Parallel 0.4 inch
0.4 inch
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- Caution Label is provided with PCB JIG.
- Request labels to LGEAI before using all of provided them with PCB JIG
(SVC part # : MEZ62260116)
- A : left side of
forming
- B : Gap between
cabinet & T/Cover
A
B
Type 1. case
Type 2. case
A
B
- Caution Label will be sent to the customer with the customer letter.

Service Bulletin
WASHING MACHINE
Step 10) Check Balance of Product
Verify the washer installation
•Make sure the washer is level and that the feet are all evenly contacting the floor.
•Make sure the floor is solid and strong enough for a washer. Never install the washer
on carpet or other soft flooring.
Step 11) Inform the customer of all these NORMAL OPERATING CONDITIONS and changes.
a. Cycle times are longer
Washer cycle times were changed with the software update to allow for the extra time
needed to make sure the load is balanced for spinning and to allow for a two stage spin.
While these longer default cycle times result in a very slight increase in energy
consumption, the washer still meets Energy Star guidelines. (NOTE: Display times of an
hour or more are displayed as Hr:Mn, such as 1:10)
b. My machine is displaying “uE”
The old software did not display “uE” during rebalancing. It only stopped and displayed the big
“UE” error code if the load could not be rebalanced. The new software now displays little
“uE”, alternating with the estimated time remaining, to inform the user that the washer is
attempting to rebalance the load. The time countdown will stop and the washer will fill
with water.
(Note: The washer will fill to the highest setting in an effort to redistribute the clothes.) If
“uE” is displayed, the consumer can stop the machine to manually redistribute the load
themselves, rather than waiting for the washer to make repeated attempts to rebalance
automatically. If the load cannot be rebalanced after three attempts, then the washer will
stop and the big “UE” error code will display.
c. My washer is repeatedly rinsing
If the washer detects that the load is too far out of balance to spin safely, it will display “uE”
and attempt to rebalance the load. It must add water to assist in redistributing the clothes;
this is not a rinse. If the washer is unable to rebalance the load after three attempts, it
will stop and display the big “UE” error code.
d. My washer is stuck. The time doesn’t count down.
If the washer detects that the load is too far out of balance to spin safely, it will attempt to
rebalance the load. During the rebalancing process, the time will stop counting down. The
extra time it takes to rebalance the load is not calculated, so the display will not change.
If the washer is unable to rebalance the load after three attempts, it will stop and display
the “UE” error code.
e. Occasional big “UE” error code
i. If the load is tangled or uneven, untangle the load and distribute the items evenly
around the tub. Start a Rinse and Spin cycle to complete the load.
ii. If the load contents are a mixture of heavy and light items, the washer may have
difficulty balancing the load. Sort loads by fabric type and weight for better
balancing.
iii. Very small loads may be more difficult for the washer to balance. If the washer has
difficulty balancing small loads, try adding more items to the load.
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Appendix. SOFTWARE UPDATE TROUBLESHOOTING
Service Bulletin
WASHING MACHINE
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•The tool will attempt to communicate with the PCB 5 times (“Try Connect” display). If there
is no communication, the tool will display “Baudrate Settin 31250” continuously. Check the
tool harness connections, and then unplug the tool for a few seconds and try again.
•If there is an error in the update process, the display will not show the “Success” screen.
The tool will display “Progress 100%” continuously. Unplug the tool for a few seconds and try
again.
•If the success number shown in the tool does NOT match the MODEL CHART or there are any
other errors, unplug the tool for a few seconds and then try again. Verify each step of these
instructions carefully for correct settings and file selection.
•If the SD memory card is not properly inserted or the software files are missing or corrupted,
the tool will display an error describing the problem. Make sure the SD card is properly
inserted in the socket and that it is fully seated and clicked into the socket on the side of
the tool.
Tips the wrong software was loaded:
Some cycles may not work
Some temperatures you may not be able to select like hot
Some cycles may have dashes [- -] in the display instead of the time like a load sensing cycle.
Cycle times may be off; like Rinse/Spin (50 minutes), or Express Wash is (64 minutes)
The washer may not go into the diagnostics mode
The control may not power up

Appendix. Flow chart for S/W update
Service Bulletin
WASHING MACHINE
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Dispatch SVC
Do you have
PCB JIG?
(Before SVC)
Y
N
S/W update
with PCB JIG
Verify S/W Ver.
and any mark on
back of display PCB
Request PCB,
then visit customer
Success
S/W update
Verify updated S/W
version
Y
N Try S/W
update again
(3 times)
Y
N
Attach S/W update
label on the
right side of unit
Verify “S/W update
Label” and S/W Ver.
No S/W label
and old S/W
Ver.
Y
N
Attach Caution
label on T/Cover
Display correct
S/W Version
Y
N
Old S/W version
and no mark
Verify updated S/W
version
Y
N
* Any marking
Finish SVC
Replacement of
PCB and mark on
back of PCB
Display correct
S/W Version
N
Y