DR. JOHANNES HElDENHAlN GmbH
D-8225 Traunreut .Tel. (08669) 31-O
SERVICE MANUAL TNC 151/155
Pe.ae 28
Kundendienst
Se&ion 2.2.6
6. The final step of the full initialization procedure is the
Other interrupts are also possible; these are described in
calibration of the two potentiometers on the front panel of the following section.
the Control. These met be adjusted to give the display:
"OVERRIDE POT ADJUST: 100
SP. RW. SPEED ADJUST: 100"
If necessary, the caps of the knobs must be removed, the
securing screws slackened, and the knobs realigned and
tightened in the 100% position.
7. At the beginning of the initialization procedure, inter-
ruptions of the program are inhibited. After completion of
the initialization, interrupts are enabled to permit jumps,
at any time, to various points in the test procedwze.
Once the interrupts have been enabled, the test program can
be interrupted by presSing one of a number of keys. The keys:
for example, cause restarts at various points during the
initialization routine, as shown in figs. 8 and 9.
Q
System re-boot
lzg
"EXTERNAL UNIT CONNBCTED ?"
@
"JUMP OVER KEYBOARD TEST ?"
q
"0, 1, OR 2 PC-BOARD ?"
El
"OVERRIDE POT ADJUST: 100
SP. ROT. SPEED ADJUST: 100"