Sharp UP-600 Service Manual page 30

7)-2. Drawer 1 Check
Checking
The program turns on the drawer 1 solenoid, senses the value of the
drawer open sensor every 100 ms, and displays the operating status.
Display
DRAWER 1 Check
Open Sensor : OPEN (or CLOSE)
How to exit the program
Press the CANCEL key to exit the program.
7)-3. Drawer 2 Check
Checking
The program turns on the drawer 2 solenoid, senses the value of the
drawer to open the sensor every 100ms, and displays the operating
status. The procedure for displaying the menu and exiting the pro-
gram are the same as for the drawer 1 check.
8) Dot Pulse Adjustment:
R/J printer dot pulse width adjustment
The dot pulse width adjust circuit is provided to control the width of
the current applied to the dot head of the printer, according to a
supply voltage fluctuation.
When the circuit is changed by repair work, the dot pulse width needs
to be adjusted using the 200k pot VR2.
Display
Dot pulse adjustment
+24V
+24V
VCC
R81
130K"F"
D1
1SS355
VCC
VR2
200K
R263
10K
Q5
TRG
KRC106S
C59
10000pF
How to exit the program.
Press the CANCEL key to exit the program.
VCC
D2
R137
E102
3.3K
R135 R136
2K 62K
+24V
8
5
7
PE
6
IC10B
4
BA10393F
ZD5
UDZ4.3B
TP
410
420
410
400
390
370
380
370
360
350
340
330
320
21.6 22 23 24 25
Drive voltage (V)
TRG
Pw
Pt
Pd
PE
Pw 4µsec
Pt 1000µsec
Pd is adjusted to 373±3µsec. when Vp is +24.0V.
330
±3µs
(Allowance)
26 26.4