Heathkit IO-4205 - Page 79

Page 77
Slide the CRT shield over the neck of the CRT.
Note
the position of the tabs on the CRT shield
with reference to the key on the CRT plug.
/
( .-:"' ) Push the face of the CRT into the ring in the
cabinet front. Nate the position of the key on the
CRT plug .
Install
the two CRT clamps around the neck of
the CRT but inside the CRT shield .
CAUTION:
When you install the input shield in the Secure the CRT clamps and the CRT shield to
next step,
be sure the shield is up tight against the the tops of the CRT brackets with two 6-32 x
bottom of
the chassis between the circuit boards be-
3/4" screws.
Tighten these screws only enough
fore you tighten the screws, or you may break one of
the circuit boards. to
hold the CRT in place. The CRT may have to
( /
be repositioned later.
( \;5 Install the input shield with #6 x 1/2" screws in ~
chassis holes F and G. Be sure not to pinch any er to Pictorial4-19 (Illustration Booklet, Page 22)
wires
between the shield and the chassis. the following steps.
~ ~ o ~ :7 ZD
( \ ') fn sa the front panel brae e w1 fli #6 x 1/2" Align the keyway of the CRT socket with the
screws into chassis holes D and E and into the key on the CRT plug and push the socket onto
input shield. Do not tighten the screws. \ V the CRT plug .
Install
another #6 x 1/2" screw through the top ~ ) Connect the Blu wire coming from grommet BC
slot in the front panel bracket and into the to the CRT socket lug 6 (S-1).
cab
'net front.
~ If necesary, reposition the front panel bracket so
the front panel is perpendicular to the top of the
chassis. Then tighten the screws at holes D and
E.
Re er to Pictorial 4-18 for the following steps .
Refer
to the inset drawing on Pictorial 4-18 and
install a rubber foot in each of the three indi-
cated holes in the CRT shield. Use a small
screwdriver to force the feet into the holes.
( ~ he 3/4" x 5" rubber strip into two equal
lengths.
(4 fer to Detail4-18A and place a length of rub-
ber strip onto each CRT clamp .
WARNING:
Handle the CRT very carefully. Be~;ause
of its high vacuum, do not strike, scratch , or subject
the CRT
to more than moderate pressure at any time.
A fracture of
the glass could result in an implosion of
considerable
violence capable of causing personal
injury.
(INCHES)
2
3
( )
Connect the Gry wire coming from grommet BD
to the CRT socket lug 7 (S-1).
Connect the wires coming from grommet BE to the
CRT socket as follows:
(
+-Wht -Gry wire to lug 8 (S-1).
,--r- arge Brn wire to lug 4 (S-1).
~ Large Red wire to lug 3 (NS).
( ) Large
Org
wire to lug 2 (S -1).
(
~ ither large Grn wire to lug 1 (NS).
Other large Grn wire to lug 12 (S-1).
( ) R16:
Connect a 100 k.O (Brn-Blk-Yel) resistor to
the CRT socket between lugs 1 (S-2) and 3 (S-2).
(
~ e Gry wire coming from the horizon-
tal circuit board to the CRT socket lug 9 (S-1).
5
1
1
1
1
1
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