TM  11-5820-890-20-2 2-48 2.2. TROUBLESHOOTING FLOWCHARTS. Continued Chart 12 VAA CB1 TRIPS WHEN SET TO ON. (Sheet 1 of 5) V U T S R P N M L K J H F E D C B A AM 1780 J501 NO YES SHORT TO GROUND ? REPLACE AM 1780. 1.   SET RT TO STBY. 2.   SET VAA  CB1 TO OFF. 3.   REMOVE CX 13300 FROM AM 1780 501. 4.   CHECK CONTINUITY AT AM 1780 J501, PIN C TO PIN A (GND). NO YES SHORT TO GROUND ? 1.   REMOVE CX 13417 FROM MB  J4. 2.   CHECK CONTINUITY AT (J4) CX 13417 P1, PIN C TO PIN A (GND). 2 SH 4 NO YES CX 13417 PRESENT ? 1 SH 5 START NO YES TWO CX 13417 PRESENT ? NO YES LS 671 PRESENT AT MB J4 ? 2 SH 4 3 SH 3 4 SH 2 CX 13417 P1 V U T S R P N M L K J H F E D C B A