Sharp LC-20AV7U Service Manual - Page 18

TROUBLESHOOTING Table of Contents for the Troubleshooting Flow Charts Flow Chart No. Description Page 1 The power cannot be turned on. 7-2 2 The fuse blows out. 7-2 3 When the output voltage fluctuates. 7-2 4 When buzz sound can be heard in the vicinity of power circuit. 7-2 5 +35V is not output. 7-2 6 VT+33V is not output. 7-3 7 INV+22V is not output. 7-3 8 DTV-ON+3.3V is not output. 7-3 9 DTV-ON+2.5V is not output. 7-3 10 DTV-ON+5V is not output. 7-3 11 AL+3.3V(D) is not output. 7-4 12 PANEL+3.3V is not output. 7-4 13 AL+1.2V(D) is not output. 7-4 14 AL+3.3V(A) is not output. 7-5 15 P-ON+5V(1) is not output. 7-5 16 +12V is not output. 7-5 17 P-ON+9V is not output. 7-5 18 DTV-ON+1.8V is not output. 7-6 19 PANEL-6V is not output. 7-6 20 The key operation is not functioning. 7-6 21 No operation is possible from the remote control unit. 7-7 22 Picture does not appear normally. (Tuner input (Analog) / Video input/S-Video input) 7-8 23 Picture does not appear normally. (Tuner input (Digital)) 7-8 24 Picture does not appear normally. (Y / Pb / Pr input) 7-8 25 Audio is not outputted normally. (Tuner input) 7-9 26 Audio is not outputted normally. (Tuner input (Digital)) 7-9 27 Audio is not outputted normally. (Audio input terminals) 7-10 NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. 7-1 A7144_45TS