TM-9-1240-216-34 Maintenance Manual M19 and M24 Persicope Download
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TM 9-1240-216-34 4-4. IMAGE DIM OR FLICKERING (SHEET 3 OF 4) LISTEN FOR SNAPPING OR POPPING SOUND (ARCING INSIDE THE PERISCOPE) TURN OFF POWER SUPPLY (JPG). LOOK AT ANY TARGET THROUGH EYEPIECES (1). (FIRST BOTH, THEN ONE AT A TIME). TURN OFF POWER SUPPLY (JPG). DISCONNECT CABLE (2) FROM CONNECTOR (3) AND INSTALL CAP (4). REPLACE ELECTRON TUBE ON DIM SIDE (VOL II, PARA 4-30). DISCONNECT CABLE (2) FROM CONNECTOR (3) AND INSTALL CAP (4). DO CHECKOUT (PARA 2-2). Para 4-4 (Sheet 3 of 4) 4-14 Vol I