Dell GCR-8481B Service Manual page 10

CH1
TP10:
F+
CH2
TP18:
FOK
Fig. E-1. FOK, F+ Signal
CH1
TP15:
FEO
Fig. E-3. FEO Signal
CH1
TP15:
S-Curve
Fig. E-2. S-Curve (R505:Open)
CH1
TP25:
MDP
Fig. E-4. MDP Signal
27