IBM 3279 2A Maintenance Information page 75

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Scopepoint C2 804 Sync. Internal 0.1 p.s/cm, 1 V/cm
x 10 probe. If bad, change card C2 then 02, E2, F2.
+ Indicator Row
Seopepoint C2
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Sync. Internal 1 V/cm x 10 probe.
If bad, change card 02 then C2, E2.
Figure 6-2 (Part 3 of 3). Waveforms
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Chapter 6. Support Information 6-4
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Seopepoints C2 002 C2 Jl0 Sync. Internal 0.2I's/cm,
1 V/cm x 10 probe. If bad, change card 02, then C2,
E2, F2.
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Frame Sync.
Seopepoint C2 G12 Sync. Internal 1 V/cm x 10 probe.
If bad, change card 82 then analog.