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SVC Skills Information

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  1. SVC Skills Information ◆ Issue number : ◆ Publication Date: 2010.08.30 Information minutes : □Technical Information ■PartsInformation 1. Subject : Reworking guide for LCD TV series supports BBTV used GMT reset IC 2.Apply Model : LE8500/LE7500/LE5500/LE5400/LE5350/LD650/LD550 3.Apply Serial No : 4.Symptom : Power off at times while TV is operating 5. Cause Analysis ▶This reset ICs are used for power detection. ▶ 24V output of reset IC becomes low due to voltage drop issued by temperature drift of GMT IC. Regarding the GMT IC specification sheet, when current variation by temperature is under max. 3uA, max voltage drop must be under 0.1V at raising temperature. However, voltage drop is 0.7V by divided resistor in this problem case. 6. Applied Model (with LGE3549 Main SoC) ▶ PSU Type(12V & 24V use): 55/47LE8500-UA, 55LE7500-UC, 55LE5500-UA, 55LE5400-UC, 60/52LD550-UB, 55LD650-UA ▶ Lips Type(12V & 20V use) : 47/42LE7500-UC, 47/42LE5500-UA, 47/42LE5400-UC, 42LE5350-UB ▶ Lips Type(3.5V & 20V use) : 46/42/32LD550-UB, 47LD650-UA * 4th suffix is module name.(D:AUO, W:LGD, M:SHARP, J: CMO) 7.How to SVC Replace GMT Reset IC by On-semi’s one. Please refer to following pages.GMT Reset IC P/No. : EAN61151001, On-semi Reset IC P/No: EAN60670101 8.How to handle before Part (□ Obsolete, □Without change, □ECO Use byeongyeonghu ) ※etc: 9. How to handle a product for sale ( ■No relationship □Entire collected Writer : Mario Bae Tel. : +82-031-686-4286

  2. SSXK 671B3 5digit 4digit SVC Skills Information ◆ Issue number : ◆ Publication Date: 2010.08.30 Information minutes : □Technical Information ■PartsInformation Step 1. Check applied Reset IC (On-semi or GMT) at IC8007, IC8008 Top Right of PCB On-semi (P/N: EAN60670101) GMT (P/N: EAN61151001) Writer : Mario Bae Tel. : +82-031-686-4286

  3. X X SVC Skills Information ◆ Issue number : ◆ Publication Date: 2010.08.30 Information minutes : □Technical Information ■PartsInformation Step 2. Replace both IC8007, IC8008 by On-semi Reset ICs LE8500/7500/5500/5400 Series LD650/550 Series Writer : Mario Bae Tel. : +82-031-686-4286