AMSTRAD CPC6128 Service Manual page 13
Micro computer/ colour monitor/green monitor
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Also See for CPC6128:
- User instruction (521 pages) ,
- Service manual (32 pages) ,
- Service manual (31 pages)
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ALIGNMENT CHECKS
100
80
60
Amplitude
ratio (%)
40
20
S00Opsec
Fig. 5-1 Index burst waveform
Inner: b/a x 100%
Outer: a/b x 100%
10
20
30
AO
50
Amount of Off-center (p)
Fig. 5-2 Off-centre calibration curve
Fig. 5-3 Azimuth burst
(Effective width of read head is 180u)
-48°
-72' +48
+72
- BB} O-
Fig. 5-4 shows azimuth burst in the cases of azimuth -12',0' and +12.
13
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