Pinout

Pin #	Assignment
4	G1 Red Pin
5	Heater (F1)
6	Heater (F2)
7	G1 Blue Pin
8	Blue Pin
9	Green Pin
10	Red Pin
11	G1 Green Pin
12	G2 Red Pin
12	G2 Green Pin
12	G2 Blue Pin

Note: If you only see one assignment or reused pin for G1 (or G2), it means there is only a single G1 (or G2) grid shared across all cathodes. This is called "common G1" (or "common G2"). In this case, when using a Universal Adapter (UA), you only have to hook up one G1 (or G2) lead on your tester to connect all cathodes' G1 or G2 properly.

Sencore CRT Tester Info

Tester Model	Heater	Socket	Bias	Video
CR-7000	-	UA	52V	Video 2
CR-70	-	UA	36V	VIDEO
CR-31	-	-	B	N/A