Have you tried playing with the FP while
measuring the MUX outputs?
MEASUREMENTS NOW TAKEN
20 B TIM REF, U2427C PIN 8, measures + 5.62VDC, no change in value from any front panel control
19 A TIM REF U2427 PIN 7, measures + 9.55VDC, no change in value from any front panel control
25 A TRIG LVL R2730,
START POINT DEFAULT SETTINGS
MODE AUTO SOURCE
COUPLING
-0.93 VDC
MODE LEVEL -1.19 VDC
MODE NORM -0.99 VDC
MODE SGL +0.93 VDC
SOURCE CH2 -0.93 VDC
SOURCE CH3 -0.89 VDC
SOURCE CH4 -0.89 VDC
SOURCE LINE 0.0 VDC
COUPLING DC -0.93 VDC
COUPLING HF -0.93 VDC
COUPLING LF -0.93 VDC
COUPLING AC -0.93 VDC
SLOPE MADE NO CHANGE
LEVEL MADE NOW CHANGE
26 B TRIG LVL R2731,
CH1 VOLTS / DIV
0.11 AT 50MV
0.0 AT 5V
0.01 AT 1V
0.94 AT 2MV
22 HORIZ POSTION, R2535
mid scale +0.05V DC
CCW 1.37 VDC
CW -1.37 VDC
16 DELAY REF 0, CR2733 CATHODE BAND
DELTA+ REF mid scale +0.01V DC
CCW -1.24 VDC
CW +1.26 VDC
17 DELAY REF 0, CR2742 CATHODE BAND
DELTA T OUT INDEP mid scale +0.01V DC
CCW -1.24 VDC
CW +1.25 VDC
YS
JK
