General Information. Technical information

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1 General Information Service Bulletin Page 1 of 19 * Subject: Repair guide for LED Array * Bulletin Registration Date: * Effective from Date: ~ Applicable for models From 2014 to 2015 models See Excel Attachement * Applicable Serial Number: Form 2014 year to 2015 year Applicable in warranty: YES NO Also applicable YES NO outside of warranty: Applicable only with symptoms below: YES NO Technical information * 1) Symptoms / Customer Complaint - Hot spot / No Backlight /Abnormal Display / Dark Screen/ Faulty Display / Others Applicable with every repair: YES NO * 2) Problem / Cause - Weak Backlight LED LENS adhesive - Electrical stress has caused an LED Package to fail. * 3) Solution: (Short explanation of the solution) - Replace Backlights with new LED Arrays.

2 Service Bulletin Page 2 of 19 Details Backlights On Bright Point No 1st, Check the backlight On/Off -This guide is for backlight off or backlight Bright point 2nd, Check the backlight Bright point when Backlight is on Off Yes Check Module P/N and name 3rd, Check the Module Name & P/N on Module Label -The LED Array varies from Module Name & P/N beginning on page 3. * Please see the next page about how to order the new LED Array. Check LED Bar Other Defect 4th, Check the arrangement of LED Bar -Check to see if the type & P/N looks correct beginning on page 9. 5th, Replace the LED Array -Replace the new part carefully Replace LED Array

3 Attachment. How to order the new LED Array Service Bulletin Page 3 of Check the Label on back side of module 2. Check the Module Name & P/N Example Name: HC600DUF-VHHS2, P/N: EAJ Match the LED Array P/N with Panel P/N table. Or use the Excel file attachement. - Refer to pages (4 ~ 7).

4 [Working Methods] When different LED Bar Connector Type Service Bulletin Page 4 of 19 When the connector is a different LED bar connector, use direct soldering working guide below. 1. New LED Bar connector is a different type 4-1. If both open, you can soldering this way. 3. Tester use pattern check. Test between (-) (+) to connector. (-) Lead and (+) Lead open 2. Cutting off the cable for connector If not open, you can soldering this way. Check continuity between Test points (-) and (+) to connector leads. Pay attention to which wire goes to (+) and (-). After Cutting off the cable strip each wire about 1/8 inch. Pre-Tint the wires before soldering. Solder paste will help considerably. (-) Lead not open (+) Lead open Be sure Test Points (-) and (+) are clean before soldering. Avoid excessive solder.

5 Attachment. Configuration of Module LED Array Model Name Module P/No. Module Name 32LB55/53 EAJ LC320DUE-FGA5 32LB56 EAJ LC320DUE-FGA3 EAJ LC320DUE-FGA4 32LF56/58 EAJ LC320DUE-MGA3 EAJ LC320DUE-MGA4 32LB55/53 EAJ LC320DXE-FGA5 EAJ LC320DXE-FGA6 32LB56 EAJ LC320DXE-FGA3 EAJ LC320DXE-FGA4 32LB62 EAJ LC320DXE-FGP1 EAJ LC320DXE-FGP2 32LF5500 EAJ LC320DXE-MGA6 EAJ LC320DXE-MGA8 32LF56/58 EAJ LC320DXE-MGA3 EAJ LC320DXE-MGA4 32LF6200 EAJ LC320DXE-MGP2 EAJ HC320DXN-VHHR1 EAJ HC320DXN-VHHR2 32LB55 EAJ HC320DXN-VSHR1 EAJ HC320DXN-VSHR2 EAJ NC320DXN-VSBP3 EAJ NC320DXN-VSBP4 EAJ HC320DXN-VHHS1 EAJ HC320DXN-VHHS2 32LB56 EAJ HC320DXN-VSHS1 EAJ HC320DXN-VSHS2 EAJ NC320DXN-VSBP1 EAJ NC320DXN-VSBP2 EAJ HC320DXN-VHHR4 32LF55 EAJ HC320DXN-VSHR4 EAJ NC320DXN-VSBP8 EAJ HC320DXN-VHHS3 EAJ HC320DXN-VHHS4 32LF56 EAJ HC320DXN-VSHS3 EAJ HC320DXN-VSHS4 EAJ NC320DXN-VSBP5 EAJ NC320DXN-VSBP6 LGE Array P/No. (Component Repair Part) AGF AGF AGF LED Array Model LATWT322RXLZK LATWT322RYLZK LATWT325RXLZK Service Bulletin Page 5 of 19

6 Attachment. Configuration of Module LED Array Model Name Module P/No. Module Name LGE Array P/No. (Component Repair Part) LED Array Model EAJ HC320DXN-ABHR1 32LB55 EAJ HC320DXN-ABHR2 EAJ NC320DXN-VBBP3 EAJ NC320DXN-VBBP4 EAJ HC320DXN-ABHS1 EAJ HC320DXN-ABHS2 EAJ NC320DUN-VBBP1 32LB56 EAJ NC320DUN-VBBP2 AGF LATWT326RXLZK EAJ NC320DXN-VBBP1 EAJ NC320DXN-VBBP2 EAJ NC320DXN-VBBP8 EAJ HC320DXN-ABHS3 32LF55 EAJ HC320DXN-ABHS4 EAJ NC320DUN-VBBP3 EAJ NC320DUN-VBBP4 EAJ NC320DXN-VBBP5 32LF55 EAJ HC320DXN-ABHR4 AGF LATWT329RXLZK EAJ HC390DUN-VCHS1 EAJ HC390DUN-VCHS2 EAJ HC390DUN-VCHS3 AGF LATWT391RXLZK 39LB56 EAJ NC390DUN-VXBP1 EAJ NC390DUN-VXBP2 EAJ HC390DUN-VAHS1 EAJ HC390DUN-VAHS2 AGF LATWT398RXLZK 47LB56 EAJ LC470DUE-FGA3 EAJ LC470DUE-FGA4 AGF LATWT471RXLZK 47LB64/65 EAJ LC470DUH-FGP1 EAJ LC470DUH-FGP2 AGF LATWT472RXLZK 50LB56 EAJ LC500DUE-FGA3 EAJ LC500DUE-FGA4 50LF56/58 EAJ LC500DUE-MGA3 EAJ LC500DUE-MGA4 AGF LATWT501RXLZK 50LB64/65 EAJ LC500DUH-FGP1 EAJ LC500DUH-FGP2 AGF LATWT502RXLZK 50LF6500 EAJ LC500DUH-MGP1 Service Bulletin Page 6 of 19

7 Attachment. Configuration of Module LED Array Model Name Module P/No. Module Name 50LB56 EAJ NC500DUN-VXBP1 EAJ NC500DUN-VXBP2 50LF56 EAJ NC500DUN-VXBP3 EAJ NC500DUN-VXBP4 55LB55/53 EAJ LC550DUE-FGA5 EAJ LC550DUE-FGA6 55LB56 EAJ LC550DUE-FGA3 EAJ LC550DUE-FGA4 55LB62 EAJ LC550DUE-FGP1 EAJ LC550DUE-FGP2 55LF5500 EAJ LC550DUE-MGA6 55LF56/58 EAJ LC550DUE-MGA3 EAJ LC550DUE-MGA4 55LF6200 EAJ LC550DUE-MGP2 55LB64/65 EAJ LC550DUH-FGP1 EAJ LC550DUH-FGP2 55LF6500 EAJ LC550DUH-MGP1 60LB64/65 EAJ LC600DUF-FGP1 EAJ LC600DUF-FGP2 60LF6500 EAJ LC600DUF-MGP1 65LB57/58 EAJ LC650DUF-FGA1 EAJ LC650DUF-FGA2 65LF6500 EAJ LC650DUF-MGF1 60LB56 EAJ HC600DUF-VHHS1 EAJ HC600DUF-VHHS2 60LF56 EAJ HC600DUF-VHHS3 EAJ HC600DUF-VHHS4 70LB56 EAJ HC700CUF-VHHD1 70LB65 EAJ HC700CUF-VHHD2 70LF56 EAJ HC700CUF-VHHD3 49LB55/53 EAJ LC490DUE-FGA5 EAJ LC490DUE-FGA6 49LB62 EAJ LC490DUE-FGP1 EAJ LC490DUE-FGP2 49LF5500 EAJ LC490DUE-MGA6 49LF6200 EAJ LC490DUE-MGP2 LGE Array P/No. (Component Repair Part) AGF AGF AGF AGF AGF AGF AGF LED Array Model LATWT503RXLZK LATWT552RXLZK LATWT553RXLZK LATWT602RXLZK LATWT603RXLZK LATWT702RXLZK LATWT491RXLZK Service Bulletin Page 7 of 19

8 Attachment. Configuration of Module LED Array Service Bulletin Page 8 of 19 Model Name Module P/No. Module Name 42LB55/53 EAJ LC420DUE-FGA5 EAJ LC420DUE-FGA6 42LB56 EAJ LC420DUE-FGA3 EAJ LC420DUE-FGA4 42LB62 EAJ LC420DUE-FGP1 EAJ LC420DUE-FGP2 42LB64/65 EAJ LC420DUH-FGP1 EAJ LC420DUH-FGP2 42LF5500 EAJ LC420DUE-MGA6 42LF56/58 EAJ LC420DUE-MGA3 EAJ LC420DUE-MGA4 42LF6200 EAJ LC420DUE-MGP2 42LF6500 EAJ LC420DUH-MGP1 LGE Array P/No. (Component Repair Part) AGF LED Array Model LATWT421RXLZK

9 Attachment. Arrangement for each inch (32 ) Service Bulletin Page 9 of 19 - Top view type LED Array on CEM3 PCB (Type: 3 bar/set) - LED Array Size (A & B): x x 9.89 (Unit: mm) [LXW(PCB) X H(LENS)] - (A) Type: 6 LEDs ea/bar-2 bar/set - (B) Type: 6 LEDs ea/bar-1 bar/set (Total 18 LEDs) Refer to marked letter on LED Circuit Board

10 Attachment. Arrangement for each inch (39 ) Service Bulletin Page 10 of 19 - Top view type LED Array on CEM3 PCB (Type: 8 bar/set) - LED Array Size (A): x x 9.89 (Unit: mm) [LXW(PCB) X H(LENS)] - LED Array Size (B): x x 9.89 (Unit: mm) [LXW(PCB) X H(LENS)] - (A) Type: 4 LEDs ea/bar-4 bar/set - (B) Type: 4 LEDs ea/bar-4 bar/set (Total 32 LEDs) Refer to marked letter on LED Circuit Board

11 Attachment. Arrangement for each inch (42 ) Service Bulletin Page 11 of 19 - Top view type LED Array on CEM3 PCB (Type: 8 bar/set) - LED Array Size (A): x x 9.84 (Unit: mm) [LXW(PCB) X H(LENS)] - LED Array Size (B): x x 9.84 (Unit: mm) [LXW(PCB) X H(LENS)] - (A) Type: 4 LEDs ea/bar-4 bar/set - (B) Type: 4 LEDs ea/bar-4 bar/set (Total 32 LEDs) Refer to marked letter on LED Circuit Board

12 Attachment. Arrangement for each inch (47 ) Service Bulletin Page 12 of 19 - Top view type LED Array on CEM3 PCB (Type: 8 bar/set) - LED Array Size (A): x x 9.84 (Unit: mm) [LXW(PCB) X H(LENS)] - LED Array Size (B): x x 9.84 (Unit: mm) [LXW(PCB) X H(LENS)] - (A) Type: 5 LEDs ea/bar-4 bar/set - (B) Type: 4 LEDs ea/bar-4 bar/set (Total 36 LEDs) Refer to marked letter on LED Circuit Board Wire Connector Ass'y Marking

13 Attachment. Arrangement for each inch (49 ) Service Bulletin Page 13 of 19 - Top view type LED Array on CEM3 PCB (Type: 10 bar/set) - LED Array Size (A): x x 9.89 (Unit: mm) [LXW(PCB) X H(LENS)] - LED Array Size (B): x x 9.89 (Unit: mm) [LXW(PCB) X H(LENS)] - (A) Type: 4 LEDs ea/bar-5 bar/set - (B) Type: 5 LEDs ea/bar-5 bar/set (Total 45 LEDs) Refer to marked letter on LED Circuit Board Wire Connector Ass'y Marking

14 Attachment. Arrangement for each inch (50 ) Service Bulletin Page 14 of 19 - Top view type LED Array on CEM3 PCB (Type: 10 bar/set) - LED Array Size (A): x x 9.34 (Unit: mm) [LXW(PCB) X H(LENS)] - LED Array Size (B): x x 9.34 (Unit: mm) [LXW(PCB) X H(LENS)] - (A) Type: 4 LEDs ea/bar-5 bar/set - (B) Type: 5 LEDs ea/bar-5 bar/set (Total 45 LEDs) Refer to marked letter on LED Circuit Board Wire Connector Ass'y Marking

15 Attachment. Arrangement for each inch (55 ) Service Bulletin Page 15 of 19 - Top view type LED Array on CEM3 PCB (Type: 10 bar/set) - LED Array Size (A): x x 9.84 (Unit: mm) [LXW(PCB) X H(LENS)] - LED Array Size (B): x x 9.84 (Unit: mm) [LXW(PCB) X H(LENS)] - (A) Type: 5 LEDs ea/bar-5 bar/set - (B) Type: 6 LEDs ea/bar-5 bar/set (Total 55 LEDs) Refer to marked letter on LED Circuit Board Wire Connector Ass'y Marking

16 Attachment. Arrangement for each inch (60 ) Service Bulletin Page 16 of 19 - Top view type LED Array on CEM3 PCB (Type: 12 bar/1set) - LED Array Size (A): x x 9.85 (Unit: mm) [LXW(PCB) X H(LENS)] - LED Array Size (B): x x 9.85 (Unit: mm) [LXW(PCB) X H(LENS)] - (A) Type: 6 LEDs ea/bar-6 bar/set - (B) Type: 5 LEDs ea/bar-6 bar/set (Total 66 LEDs) Refer to marked letter on LED Circuit Board

17 Attachment. Arrangement for each inch (65 ) Service Bulletin Page 17 of 19 - Top view type LED Array on CEM3 PCB (Type: 24 bar/1set) - LED Array Size (A): x x 9.34 (Unit: mm) [LXW(PCB) X H(LENS)] - LED Array Size (B): x x 9.34 (Unit: mm) [LXW(PCB) X H(LENS)] - LED Array Size (C): x x 9.34 (Unit: mm) [LXW(PCB) X H(LENS)] - (A) Type: 3 LEDs ea/bar-8 bar/set - (B) Type: 5 LEDs ea/bar-8 bar/set - (C) Type: 4 LEDs ea/bar-8 bar/set (Total 96 LEDs) Refer to marked letter on LED Circuit Board

18 Attachment. Arrangement for each inch (70 ) Service Bulletin Page 18 of 19 - Top view type LED Array on CEM3 PCB (Type: 24 bar/1set) - LED Array Size (A): x x 9.84 (Unit: mm) [LXW(PCB) X H(LENS)] - LED Array Size (B): x x 9.84 (Unit: mm) [LXW(PCB) X H(LENS)] - LED Array Size (C): x x 9.84 (Unit: mm) [LXW(PCB) X H(LENS)] - (A) Type: 6 LEDs ea/bar-8 bar/set - (B) Type: 4 LEDs ea/bar-8 bar/set - (C) Type: 6 LEDs ea/bar-8 bar/set (Total 128 LEDs) Refer to marked letter on LED Circuit Board

19 Attachment. Repair guide for LED Array Service Bulletin Page 19 of 19 This service is for Pickup and Delivery Service Only Preparation for replace LED Array Repair Flow LED Array Information - 32 : LED Type : A / B (2bar/1bar) - 39,42,47 : LED Type : A / B (each 4bar) - 49,50,55 : LED Type : A / B (each 5bar) - 60 : LED Type : A / B (each 6bar) Separate the board (Main/Power/T-CON) Disassemble the module - 49,50,55 : LED Type : A / B/ C (each 8bar) 03 Detach the LED Bar from BLU Environment 04 Attach the new LED Bar on BLU Recommendations 1 Room with less dust 2 Work place approximatly 15'x15' Flat, soft area to lay panel and sheets. Tool 1 Gloves, Apron, Oversleeve 2 Compressor for module * If needed, purchase locally. Be sure to obtain a moisture trap Assemble the module Assemble the board (Main/Power/T-CON) Clean up the module