SPECIFICATIONS.............................................. 1-1 CIRCUIT DESCRIPTION.............................................2-1 BLOCK DIAGRAM..................................................2-4 MAINTENANCE..........................................................3-1 REMOVAL OF CASE...............................................3-1 REMOVING/INSTALLING CRT...............................3-1 REPLACING SWITCHING POWER SUPPLY....................................................3-2 TROUBLESHOOTING.............................................3-2 ADJUSTMENT.............................................................4-1 ADJUSTMENT OF POWER SYPPLY AND CRT......4-2 ADJUSTMENT OF VERTICAL AXIS (I)...................4-5 ADJUSTMENT OF A, B TRIG AMPLIFIER...............4-9 ADJUSTMENT OF VERTICAL AXIS (II)................4-10 ADJUSTMENT OF HORIZONTAL SWEEP...........4-12 ADJUSTMENT OF X-Y OPERATION....................4-16 ADJUSTMENT OF TRIGGERING..........................4-16 OPERATING CHECKS...........................................4-19 TROUBLESHOOTING..................................................5-1 PARTS LIST AND DISASSSEMBLY..........................6-1 MAIN SHASSIS.......................................................6-2 VERTICAL ATTENUATOR......................................6-9 VERTICAL PREAMPLIFIER..................................6-11 VERTICAL OUTPUT AMP....................................6-17 SWEEP ROTARY..................................................6-18 TRIG SWEEP........................................................6-19 HORIZONTAL OUTPUT AMP...............................6-25 HORIZONTAL MODE CONTROL.........................6-26 A TRIG SWITCH...................................................6-28 BTRIG SWITCH...................................................6-29 POWER BLANKING..............................................6-30 PC BOARD AND SCHEMATIC DIAGRAM................................................................... 7-1 VERTICAL ATTENUATOR..................................... 7-2 VERTICAL PREAMPLIFIER..................................... 7-4 VERTICAL OUTPUT AMP...................................... 7-6 SWEEP ROTARY.................................................... 7-8 TRIG SWEEP.......................................................7-10 HORIZONTAL OUTPUT AMP............................... 7-12 HORIZONTAL MODE CONTROL..........................7-14 A TRIG SWITCH................................................... 7-16 B TRIG SWITCH...................................................7-18 POWER BLANKING..............................................7-20 SEMICONDUCTOR..................................................... 8-1