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5.3
TEST POINTS
The test point (TP) numbers (see Figure 5-1) and the signals
available at these points are listed in Table 5-1.
points not listed
only.
Table 5-1
PIN NUMBER
TP7
TP8, TP9
TP10
TPll
TP12
TP13
5.4
ADJUSTMENTS AND CHECKS USING THE ALIGNMENT FLEXIBLE
DISK
Table 5-2 lists the adjustments and checks using the NEC
Alignment Flexible Disk (Part Number, 806-944184-0) and in
dicates when the adjustments and checks should be performed.
ADJUSTMENT
OR CHECK
Head Radial
Alignment
Azimuth
Index
in the table are used in manufacturing
Test Points and Signals
SIGNAL
Index signal for dual-sided flexible
disks
Analog signal (differential) of head
output, used to check or adjust CE,
Azimuth, or Index
Index signal for single-sided
flexible disks
Write Protect Signal
Track 00 Signal
Media detect sensor output
Table 5-2
Adjustments
WHEN PERFORMED
After carriage assembly replacement
After carriage assembly replacement
After index sensor replacement or
after carriage assembly replacement
5-3
Test
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