LG 066ets free download

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TROUBLESHOOTING 1. Power Connect AC voltage to power case CHECK. A and disconnect all connectors of signal processor and ballast. - Check AV voltage. - Check output voltage 6871VPN004A Check Fuse (250V-380V DC) No Yes Fuse interruption Check S/W waveform of No Check B 6871VPN007A(100KHz) Yes Connect PON of 6871VPN005A and ST5V with 1K ohm resistance. No Check the voltage marked on Yes Short of signal Check C 6871VPN005A connector processor is expected. - 1 - CHECK. B Symptoms Cause / Check Disposal A. IC200 is not oscillated. 1. Check the interruption of R200. 1. Replace it. 2. Blows up : --- 2. Check interruption and replace it. 3. Rectifier diode failure of the second 3. Check oscillation waveform after replacing IC200 side. and removing D204A and D204B. If oscillation is normal, replace diode. 4. Check D201 interruption 4. Replace D201. B. IC200 is oscillated 1. Check short of circuit of the 2nd side. intermittently and 2. Check failure of D204C. makes noise in trans. C. Voltage of the 2nd side 1. IC201 failure. 1. Replace IC201. swings irregularly. CHECK. C Symptoms Cause / Check Disposal A. 5V is blocked. 1. 5V regulator failure. 1. Separate D301 and check 5V voltage. Check IC305, 301 and 300. B. 12V is blocked. 1. 12V regulator failure. 1. Check 12V as above. Check IC304. C. 15.5V is blocked. 1. Check the collector of Q300 becomes 1. Check and replace D300 or Q300. 0V by R300. 2. IC306 failure. 2. Replace IC306. D. Fan 12V is blocked. 1. IC303 failure. 1. Connect Fon terminal of P102A wi