Sharp CE-129P Service Manual page 6

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(An adjustment example)
When Vp is 6.2V under the room temperature of lO° C .
It should adjusted to T
be
above graph.
• In case the frequency counter is used
Frequency counter may
oscilloscope. In this case, connect the frequency
counter to the CLOCK CHECK terminal and adjust
the VR so that 'it should
shown in the above graph.
Step 4.
Have the printer worked to check the aetual print
density. Among other things, let the capital "I" printed
and ensure that there is no vertical dot omission.
Step 5.
After the check of the print result, remove the solder
oAe TESTJ terminal (Step (1)) aod replace the
ca.et back in the unit with care not to seize any lead
wire with the cabinet.
I
CE· 1 29P OFF CURRENT CHECK
t , Operate the paper feed key when a computer is not
connected to the CE-129P, and check if paper feed
operation (ON,.OFF) is executed normally.
2. Supply -5.0V from stabilized
fine. (GND OV: standard).
=
3. Measure the current on Vp line when the power switch is
OFF. If it is 20µA or less, it may
used power while the power supply is OFF is normal.
I
Current check during. printing
t.
Connect a computer to the CE-129P circuit.
2. Supply -5.0V from stabilized
line. (GND = OV;standard).
3. Set the power switches in the computer and the CE-
129P to ON to execute check program 1.
=
17.3µS, according to the
be used instead of the
the frequency range
be
I
oe
power supply to Vp
be recognized !hat the
I .
oe
power supply tp Vp
(IDEE
[Ä ) )
Do not sale !
- Print sampIe -
444444444444444444444444
444444444444444444444444
444444444444444444444444
444444444444444444444444
N
::z::
..
~
444444444444444444444444
>
o
z
- Check.program 1 -
w
~
o
100:· A
Y
w
a:
u. 110:LPRINT 9444444'44444
444444444444"
120:NEXT I
130:.END
4. Measure the current on
SOOmA or less,
power during printing is normal.
I
Low battery detection circuit
A circuit constant is defined so that low battery detec-
tion may executed when Vp voltage is -3.8V or less.
be
When checkprogram is executed after applying -3_8V to
the Vp line, if display of ERROR 8 appears on the eom-
puter display without printer operation, it may
reC09nized that the low battery detection circuit is
narmal.
I
Chraetar printing grade check
Check the printing
IJ)
gram 2. (~
- Print sampie -
!YU$%&'()*+,-./012345678
9:;(=)?@ABCDEFGHIJKLMNOP
QRSTUYWXVZ[~]"-
- Oleck. program 2 -
200: :8"
Y
210:LPRIHT Y!Y;CHRS
U$%&Y;CHR$ 39;Y()*+,
-./012345678
220:LPRINT Y9:;(=)?@ABCD
EFGH I .JKU1HOP
230:LPRIHT YQRSTUVWXYZ
CHRf 91;CHRf 92;CHR$
93;""";CHR$ 95
240:END
-6-
-
C E-l29P
FOR 1=1 TO 5
the Vp line in printing, if it is
recognized that the used
it may be
I
I
by executing the check pro-
grade
.
34;Y
Y
Y
Y
be
;