Adjustments - Sharp ER-1910 Service Manual

ER-2395
5-2. Action at the time of a printer motor lock-up
When the motor stops rotating due to a paper misfeed, etc., the
power supplied to the motor is suspended to prevent the motor coil
from burning out. An intermittent peeping will occur at one Secone
intervals. ;
Reset method ©
a. Turn power off. ce 5
b. Remove the cause ae motor locked. - :
c. Turn poweron. .
d. Push the [7] (receipt feed) key and i] iguana feed) key to
check if the cause has been removed.
e. Push the [CL] key.
6. Adjustments
6-1. Clock adjustmentit —
VR1 (100K), TP1<—>GND
| seek to pearagrapn: 4: 1.
6-2. Error adjlistnent
Trimmer capacitor C5, TP1<—>GND.
' Since it has been factory adjusted, no adjustment should be made.
6-3. Printer speed. eee |
VR2 (6.8KQ), T Race 2aNG: |
'VR2 adjustment | me
The Q9 base voltage can be e changed using VR2 to aus painter
cree. | =.
1) Apply the aie probes: across GND. ape the test pin TP2.
2) Do master reset and feed journal paper continuously.
3) Observe the waveform on the oscilloscope and adjust it as shown
below.
7. Test fuinetlons
_(ER- -1910/1 920/2385/2395) -
7-1. Prerequisite
This test function operates when the test program stored in the
SC1003C CPU internal ROM. The following are required in order
to execute the function.
a. The power supply to the logic circuit must be normal.
b. Both the CPU input pins and CPU internal logic circuits are
functioning normally and that the entire KDC (~PD7507), and its
"address and data buses are operating normally.
7-2. Start .of test function 3
The following key operation is required in the SRV1 mode to start
the test.
XXxXX 3[TLor
Test command
Master reset is required when the sete is to be started for the
first time.
7-3. List of test commands
Test Test
No. | command
es
a
a
Clerk/Mode switch test
.
a
XXXxx02
Keyboardtest
Se
are
}
Test description
Display and buzzertest -
~ Receipt ON/OFF switch test
Drawer open test
(The code 6 to 8 are for optional drawers)
5,6,7,8
oe Continious print tes
eee area mons
14 | Key positon sodetest
bo
ae ae
System clock test
Counter clock test
Sequential test - 1
Sequential test — 2 (drawer al sensor
disregarded)
ae
[eee
XXXX22
"4
Note: *1 XXXX:
ER-1910—> 548
ER-1920-> 916° -
ER-2385-> 815
ER-2395— > 1062
Sum check data
for standard
key layout
Test message is printed on both the receipt and journal.
The contents of the totalizer and the preset values are
not erased by the test.
Clerk switch test is applicable only for the ER- 1920, 2395.
Ignore the test for the ER-1910, 2385.
NOTE-1:
NOTE-2:
NOTE-3:
7-4. Test description.
| Dy Test No.1: Clerk and mode switch test
@ Key operation
Push the clerk switch—clerk switch E. ak :
Then, push the clerk and mode switches in the following ¢ order.
Clerk and mode switch operation| Display
_ Clerk SW. A
7 Clerk Sw. B
Clerk SW. D |
Clerk SW. E
Mode SW PGM
or VOID
| _ With clerk switch:
| model only.
If not, skip this part.
a)
cl> orOFF
OPX/Z or TIME
REG
X1
ZI
his
~
I3 OW
—
I
-
() Description ©
As the clerk and mode switch position number is displayed,
check the number. |
@B) Termination .
The mode can be terminated when the mode switch is turned
to the SRV1 side from other position.
Termination print at error
Termination print at normal end OY.
NOTE:Though the cisgiay i may sway y ring this t test, it i is not
a Ratner: