Lamp Assembly - IBM 1402 Reference Manual

HUB IDENTIFIED WITH RED DOT
HEll CAL
SLEEVE
READ FEED END
MOUNTING BRACKETS
I
-
-.003" TO .005"
±.OOS"
~'~------------4.000"~'------------~
Figure 3-42. Center Stacker Joggler Assembly
at several digit times on timer. If the mounting
plate slotted hubs do not allow proper adjust-
ment, repeat Step 8.
Lamp Assembly
REMOVAL AND REPLACEMENT
1. Remove machine power.
2. Loosen two contact strap screws until lamp can
be slid out of lamp holder. Unplug lamp lead
from SCTB 6 and remove. Refer to Figure 3-44.
3. Reinstall lamp by plugging lamp lead into SCTB
6 and inserting lamp to its full depth into lamp
holder. Retighten contact strap screws.
4. The lamp holder mounting screws must be
loosened to permit the plastic lamp holder to be
Figure 3-43. Solar Cell Position
3-36
shifted. This will permit the lamp base to seat
firmly in the holder with the lens end fully seated
against hole in solar cell mounting block. Refer
to Figure 3-45.
5. Check solar cell o'utput by setting lamp terminal
voltage at 1.8 and measuring a minimum of 150
fAa across cell at any index point. Cell output may
be peaked by rotating lamp in holder.
NOTE:
Depress the end of the contact strap to re-
lieve pressure. This will permit rotating and/or re-
seating of lamp. It may be necessary to reposition
lamp holder after rotation (Step 4).
Solar Cell Assembly
REMOVAL AND REPLACEMENT
1. Remove machine power.
2. Loosen set screw and remove solar cell assembly.
Unplug solar cell leads from SCTB 2 and SCTB 8.
Refer to Figure 3-44.
3. Reinstall solar cell assembly by inserting cell
into cell mounting block and leaving approxi-
mately
~4"
of the metal sleeve exposed above the
cell mounting block. Position the scribed locating
mark so that it points toward the light source.
Refer to Figure 3-44.
4. Connect solar cell leads to meter. Check output
by setting lamp terminal voltage at 1.8. At an
index point, measure for a minimum of 150 fAa
across the cell (see Step 7 in solar cell timing
procedure). To avoid damaging cell, use care
when tightening cell retaining set screw. Refer
to Figure 3-44.
5. Plug the solar cell leads into SCTB 2 (yellow
lead) and SCTB 8,