Sharp ZQ-4400

ZQ+4400
ZQ-4450
V. The horizontal line pattern is displayed. (Pressing the Enter key
goes to the LCD density control check screen:)
During displaying of the LCD check in T to: V, the density control
can .be~performed with A and W keys. If possible, the most
appropriate density is automatically performed for each screen.
in the-case of IT and IV, the following symbol will light.
BATT 30; 31: EDIT 2nd CAPS * (s] hits
in the.case of iI and V, the following symbols will light.
Ed El
key goes to the menu display screen.) :
After displaying the horizontal. pattern, the Lop aaa is auto-
matically adjusted.
ie
enelry of
2) When PCB’is selected:
Wiring of (1) RAM is checked, and WRITE/READ of (2) A5h and
(3) 5Ah are performed for the 1 to perform:the RAM
bit failure check. After checking, ity“is displayed‘ In
case of an NG, the check where the NG occurred is also displayed.
However, an error may caused by the defective device.
yDuring checking; -tou5*
Tk a |
"End of Checking (Normal)
RAM 128K
End of Checking (NG)
RAM 128K 1
When the check is completed normaly, | press the Enter key to return
to the menu ‘display screen. In case of an error, press 2nd + CCE
keys to return.
(3) When SET is selected:
This item is for production process test, and is:not required for servic-.
ing.
(4) When ESD is selected:
This item is for production process test, and i is not required for s servic-
ing.
(5) When PT AGING is ‘selected:
The following procedures II to IV are repeated without stop. To ter-
minate, press the RESET key. When the battery. voltage falls under
the CAUTION level, set the communication output port to HIGH.
During this procedure, even oe displaying, the machine operates
—_—_—~— atthe full power.__ in
The LCD density control check is performed. (Pressing the Enter
IV.. ‘The: results-of the above RAM. checks. are displayed ‘ as. shown
below: © *
In normal procedure, the display is kept for
RAM 32 Kbyte, about 72 sec
RAM 64 Kbyte, about 92 see. :
RAM 128 Kbyte, about 123 sec.
RAM 256 Kbyte; ‘about 186 sec.
Then the operation goes to the next siep“(under the normal key
waiting state). In case of an error, the aging is. stopped at once.
The rough ratio of the operation and-the key waiting state is 1:
1.5.
- Normal _
| RAM CHK ~
OK
000013
_ Error
NG
RAM CHK
| 000001
This figure shows the loop number.
V. The RAM contents are reversed for every 100 times and the
operation goes to step Il.
(6) When LB is selected: .
I. The following display is given ‘and ‘the acess of
rent is performed.
max. Cur-
=
II. When the battery voltage falls below the CAUTION level, the
following display is given and |. symbol is lighted.
LB aH,
ts CAUTION _.
IIT. When the battery. voltage falls below: the FATAL: level, the opera-
tion is turned off. Under this: staté, no key is valid. To terminate,
reset the machine. :
(7) When EM is selected: a
This item is for production process test, and is not required for sérvic-
ing... . P ;
I. ASh is written to the whole area of RAM.
II. The zigzag display is shown for 2 sec, and the reversed display
is shown for 2 sec.
The value written in the RAM is checked. At that time, the
reversed zigzag display is kept.
Required time: RAM 32 Kbyte, about 1.1 sec
RAM 64 Kbyte, about 2.1 sec
RAM 128 Kbyte, about 4.2 sec
RAM 256 Kbyte, about 8.4 sec
Til.