Tandy 2000 Service Manual page 321

a
5.3.3
INDEX
sensor
position
adjustments
1)
Equipment
Disk
Tester
CE
diskette
(DYIVIEK
502-1D
STANDARD DISKETTE)
No. 1
plus
screw
driver
Oscilloscope
2)
Check procedure
2)-1
Connect
Disk Tester
to drive (set
power
off)
2)
-2
Load
diskette
2)
-Z
Turn-on power switch
2)
-4
Turn-on and
select drive
2)
-5
Read
timing of
each waveform
at
TPB9.
TPBIO
under read
mode
TK02,
using oscilloscope.
(
see figure)
Trigger: EXT
-INDEX
Signal: CHI-TPB9
CHz
-
TPBI
O
(DC
, +)
(TPD14
)
(AC
)
(ac, rNV)
Add
Spec
i fication
Adj
ust.
Check
2001100
2001200
2001200
2001300
US
at
TKO 2
Us
at
TK02
Us
at
TK02
US
at
TK02
(side
0)
(si-de I)
(side
0)
(Side
r)
Trigger
-TNDEX
S
ignal
TPB9-10
(
Burst
wavef orm)
I
ff
(5olrs)
I
!
-l
ll:
PCA
set
screw
To2