560 Series plug-in interface

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The plug-in interface of the 560-series scopes is a single 24-pin Amphenol connector per slot (horizontal/vertical).

Pin	Function	Comment
1	6.3 VAC	6 A capacity in 561, dedicated winding per slot
2	6.3 VAC	return for pin 1
3	plug-in interconnect	50 Ω coax between slots, center conductor on right slot, screen on left slot
4	plug-in interconnect	50 Ω coax between slots, screen on right slot, center conductor on left slot
5	ground return to PSU
6	+420 V unreg. via 2 kΩ	from +300 V regulator input
7	117 VAC	from mains transformer primary (power line)
8	117 VAC	return for pin 8
9	chassis ground
10	+300 V reg.
11	trigger signal out (V)	to pin 12 on other slot
12	trigger signal in (H)	from pin 11 on other slot
13	blanking	to blanking deflection plate on CRT, 560 kΩ pull-up to 125 V in 561 (NC on left slot)
14	intensifying	to CRT (NC on left slot)
15	+125 V reg.
16	−12.2 V reg.
17	−deflection plate	left H on right slot, lower V on left slot
18	plug-in interconnect	50 Ω coax between slots, center conductor
19	plug-in interconnect	50 Ω coax between slots, screen
20	+210 V unreg. via 2 kΩ	from +125 V regulator input
21	+deflection plate	right H on right slot, upper V on left slot
22	+75 V unreg. via 2 kΩ	from −100 V regulator input
23	−100 V reg.
24	CRT cathode	NC on right slot; grounded by amplifiers, NC in timebases

Pin group function legend

DC power

AC and heater power

Deflection and Trigger Signals

Control Signals