Heathkit H14 Manual page 29

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Page 27
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Using the prodecure in the previous step, complete
the steps in the following chart.
( ) Remove the II" hookup wire from TPIQl and
connect one end to TPI02.
( ) Momentarily connect the free ends oftbe 5" and
II" hookup wires together aod note the bright-
ness of
LEDIOZ.
Now connect the II" hookup
wire to pin
16
o{Ut05. LEDI02 should glow at a
reduced brightness. If not, check U107, UI08,
and YtOl.
CONNECT 1,· WIRE TO 5101 PIN
THEN CONNECT 5" WIRE TO U106 PIN
POSSIBLE CAUSE
(LE0101 SHOULD NOT LIGHT)
(LE0101 SHOULD LlGHn IF LE0101 LIGHTS
(
I
10
'3
U114E, 0105, 0106
( ) 14
'2 U114F, 0107, Q108
( )
15 11 U114C. 0109, 0110
( ) 13
10 U1148, 0111, 0112
( ) 12
9 U114A, Q113, 0114
NOTE: Unsolder and disconnect one lead of
R189
before you perform the following test. Then
reconnect and resolcler the resistor lead.
(
) I
11
I
8
I
Ull5C, Q115, Q116
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[ )
( )
( )
Connect the
5~
wire to pin 37 of socket Ul06,
connect the 11" wire to pin 16 of U106, and
manually push the print head to the left,
LED102 should not light. Then move the print
head at least 2" to the right. LED102 should now
light. If not, check U109 and Q3.
Connect the
11~
wire to socket U106 pin 5 (with
the
S~
wire still connected to Ul06 pin 37).
LED102 should light. Now insert a piece of
paper, with the sprocket holes removed, into
the paper feed channel. Push the paper as far to
the left as possible. LED102 should now go off.
If it does not, check LED3. Q2, and U109.
With the 5" wire still connected to pin 37 of
socket U106, connect the 11" wire to pin 17 of
U106 and press the ON LINE switch. LED102
should light. Release the ON LINE switch and
LEDl02 should go off. If not, check U109 and
SW4.
( )
[ )
Connect the 5" wire to pin 36 of spcket Ul06,
connect the 11" wire to pin 17 of Ul06, and
press the ON LINE switch. LED102 should
light. Release the ON UNE switch and LED102
should go off. If not, check U110 or SW4.
With the
5~
wire still connected to pin 36 of
Ul06, connect the
11~
wire to pin 19 of Ul06
and place section 4 of SW102 in the 1
pos~tion.
LEDl02 should be off. Press TEST switch
SW101; LED102 should light. If not, check
Ull0, SW101, and SW102.
Press the POWER switch to the OFF position.
Turn R19S fully
counterclock~ise
(CCW).
Plug the print head plug into socket SlOl.