Test Points; Adjustments And Checks Using The Alignment Flexible Disk; Test Points And Signals - NEC FD1165 Maintenance Manual

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. Test
points not listed in· the table are used in manufacturing
only.
Table 5-1 Test Points and Signals
PIN NUMBER SIGNAL
TP7
TP8, TP9
TPIO
TPll
TP12
TP13
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
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.
Table 5-2 Adjustments
ADJUSTMENT
OR CHECK WHEN PERFORMED
Head Radial
After carriage assembly replacement
Alignment
Azimuth After carriage assembly replacement
Index After index sensor replacement or
after carriage assembly replacement
5-3