Sharp ER-A450S (serv.man5) Service Manual ▷ View online
Receipt feed motor: The motor rotates counterclockwise.
Step No.
Phase
A
B
C
D
1
ON
OFF
ON
OFF
2
ON
OFF
OFF
ON
3
OFF
ON
OFF
ON
4
OFF
ON
ON
OFF
Journal feed motor: The motor rotates clockwise.
Step No.
Phase
A
B
C
D
1
ON
OFF
OFF
ON
2
ON
OFF
ON
OFF
3
OFF
ON
ON
OFF
4
OFF
ON
OFF
ON
Note 1: ON = Conducting
OFF = Not conducting
Note 2: Step No. is performed by the internal process of TPRC1.
•
When the motor is locked, the circuit is connected to the CPU
through MPCA6.
through MPCA6.
3) Print circuit
8. Drawer drive circuit
Fig. 8-1
The drawer is directly supported by the CPU. No action starts when
the power supply is not steady as the output stage of the driver is
pulled VP by VRESC signal.
the power supply is not steady as the output stage of the driver is
pulled VP by VRESC signal.
Drawer open and close is sensed with the microswitch provided in the
drawer whose signal is level converted with R161 and R162 and
directly read by the CPU.
drawer whose signal is level converted with R161 and R162 and
directly read by the CPU.
9. Key, display, time buzzer controls
Fig. 9-1
1) Power on sequence
During service interruption, the CKDC8 senses POF within 500msec.
When service interruption is cancelled by turning on the power, the
CKDC8 cancels resetting of the CPU in the command mode. After
initializing each port, the CPU reads the start condition (1 byte).
When service interruption is cancelled by turning on the power, the
CKDC8 cancels resetting of the CPU in the command mode. After
initializing each port, the CPU reads the start condition (1 byte).
Fig. 9-2
After sampling POF High, the CKDC8 performs mode scan and key
scan at
scan at
, then cancels resetting of the CPU. After being cancelled,
the CPU initializes each port at
and reads the start condition.
After being cancelled, the CPU reads the start condition without fail to
set the sift mode. If, however, the first starting is made in other than
SRV mode after the CKDC8 resets the CPU without request from the
CPU, the CKDC8 sets the start condition supposing that starting is
made in SRV mode.
set the sift mode. If, however, the first starting is made in other than
SRV mode after the CKDC8 resets the CPU without request from the
CPU, the CKDC8 sets the start condition supposing that starting is
made in SRV mode.
PB
RAM
RAM
TPRC 1
STRB1~STRB5
LATCH
SO
SI
CLOCK
VHCOM
VRES
Thermal
printer
head
printer
head
VH
+24V
DR0
DRAW0
52
50
DOSP
C105
1000P
R162
4.7K
4.7K
TD62308F
R161 22K
51
DR1
DRAW1
VRESC
CPU
+24V
Drawer
solenoid
solenoid
+24V
R163
47K
47K
IC9
KR0~7,KR10,KR11
ST0~ST7
ST0~ST7
G1~G10
T0~T9
RES0
RESET
VDD
RES0
a~g,DP
KR0~KR7
KR10,KR11
a~g,DP
Key board
Display
CKDC 8
VCC
B
BUZZER
2
Driver
Driver
HTS1
SCK1
RESET
INT2
POFF
HTS
SCK
RESET
HTS
SCK
RES1
RES1
CPU
MPCA7
STH1
STH
STH
P11
P12
RES
LDRQ
SHEN
LDRQ
SHEN
P10
ERC
ECR
P-OFF
POFF
POF
RES1
SHEN
LDRQ
1
2
Start condition
Next command
4 – 21
2) Power off sequence
When the CPU senses a service interruption, it performs necessary
procedures for CPU stop. Then the CPU outputs a reset request to
the CKDC8.
procedures for CPU stop. Then the CPU outputs a reset request to
the CKDC8.
Reset request
Fig. 9-3
When the CPU senses a service interruption or an error, it performs
necessary procedure for CPU stop and issues reset request.
necessary procedure for CPU stop and issues reset request.
CPU procedures necessary for reset request
All CPU interrupts are made DI.
SCK is driven to low.
Keep LDRQ at LOW level for 20usec or more and drive it HIGH.
Loop
to
. During looping, access should not be made to
external memory.
It should be within 140usec from rising of one LDRQ to rising of
another.
another.
When, however, the CKDC8 senses a service interruption at POF, it
stops displaying. Service interruption procedure is performed after
receiving reset request from the CPU. If reset request is not sent from
the CPU within 100msec the service interruption procedure is started
after 110
stops displaying. Service interruption procedure is performed after
receiving reset request from the CPU. If reset request is not sent from
the CPU within 100msec the service interruption procedure is started
after 110
±
10msec to go into the stand-by mode.
Fig. 9-4
3) Key and switch scanning
Fig. 9-5
As the strobe signal, 8 bits of ST0 - 8 are used.
KR0 - KR7 are used as the key return signal. KR10 is used as the
return signal of the paper feed key, cashier key and MRS switch.
KR11 is used as the return signal of the mode switch.
return signal of the paper feed key, cashier key and MRS switch.
KR11 is used as the return signal of the mode switch.
4) DISPLAY CONTROL
Fig. 9-6
CKDC8 directly drives the LED display unit.
10. Power supply circuit
Fig. 10-1
+24V: Printer, solenoid power
+5V:
VCC (Logic power)
VDD: Battery charge, Battery back-uped power, CKDC-8 Back-up
power
VCH: Fiscal memory unit
20µsec or more
SCK
LDRQ
SHEN
DON'T CARE
TH
20µsec or more
TL
TL+TH 140µsec
<
=
RES1
POF
RES1
110±10msec
356.25µsec
38µsec
KR0~KR7
KR10,KR11
ST0
ST9
CKDC5
G1-G10
SA-SG,DP
SA-SG,DP
LED-display
(for custmer)
(for custmer)
LED-display
(for operator)
(for operator)
Driver
Power
trans.
trans.
DC-DC
Converter
circuit
Battery
circuit
circuit
+5V
F1
F2
Switching
regulator
+24V
+
-
~
~
VDD
VCH
4 – 22
CHAPTER 5. TEST FUNCTION
1. General
1) This diagnostic program has been developed for diagnosing ma-
chine functions in the field. The program is contained within the
ER-A450S.
The diagnostic program is stored in the external ROM which will
be executed by the CPU (H8/510) which requires the following
diagnostic operations:
ER-A450S.
The diagnostic program is stored in the external ROM which will
be executed by the CPU (H8/510) which requires the following
diagnostic operations:
a) Proper power supply voltages are mandatory for logic circuits
(+5V, VDD, POFF, +12.5V, +24V).
b) CPU input/output pins, CPU internal logic, CKDC8, MPCA7,
system bus and common ROM/RAM must be working prop-
erly.
erly.
2. Operational procedure
To start the diagnostic program, you must enter the following com-
mand.
3-digit test item number
mand.
3-digit test item number
→
key in the SRV mode.
The key assignment must be properly set and the ROM and RAM
must be operating properly to go into this mode. This is necessary
because the control jumps to the program area in the SRV mode. A
master reset must be performed before operating the ECR for the first
time. After any option is installed, a program reset is required. When
the master reset or program reset is performed, be sure to check the
printout on the journal paper.
must be operating properly to go into this mode. This is necessary
because the control jumps to the program area in the SRV mode. A
master reset must be performed before operating the ECR for the first
time. After any option is installed, a program reset is required. When
the master reset or program reset is performed, be sure to check the
printout on the journal paper.
Master reset:
Turn power on in the SRV’ mode and change it
to the SRV mode with the JF key pressed.
to the SRV mode with the JF key pressed.
Journal print:
MASTER RESET ***
Program reset: Turn power on in the SRV’ mode and change it
to the SRV mode.
Journal print:
PRG. RESET ***
3. Test command list
With the SRV mode and the following test code entry, the test start.
CODE
DESCRIPTION
100
Display & Buzzer test
101
Key code & Cashier key test
102
R/J printer test
104
Keyboard test
105
Mode switch test
106
Printer sensor test
108
Calendar osckllator test
109
SSP test
110
Drawer open sensor test (For standard drawer)
111
Drawer open sensor test (For remote drawer)
120
Standard RAM test
130
Standard ROM test
150
Printer dot pulse width adjustment
200
Option RAM test
501
RS-232 channel 1 Loop back check
550
RS-232 channel 8 Loop back check
4. Test contents
[1] Display & Buzzer test
1) Key operation
2) Functional description
Display the following message on the front and the rear display
boards.
boards.
A decimal point shifts from lower number of digit by one digit (per
200m sec.).
200m sec.).
Next, display the following segments (for approx. 1 sec.).
Repeat the above two kinds of displays.
Sound a buzzer continuously during test.
3) Check items
a) The display must be correctly shown at each position.
b) The luminosity of displays must be uniform and even at each
position.
c) Abnormal buzzer sound is not allowed.
4) Test termination
Press any key. The test terminates with the test and message printed
[2] Key code & Cashier key test
1) Key operation
2) Functional description
Key code, MRS switch state and Cashier code are displayed.
100
TL
1. 2. 3. 4. 5. 6. 7. 8. 9. 0.
8. 8. 8. 8. 8. 8. 8. 8. 8. 8.
1 0 0
101
TL
(Not used)
Cashier code
Key code
5 – 1
3) Check items
a) Cashier code (One hole cashier key: OPTION)
Display
State
000
Off
001
Cashier key No.1
002
Cashier key No.2
003
Cashier key No.3
↓
↓
014
Cashier key No.14
015
Cashier key No.15
b) Key code
HARDWARE CODE" of the following keys will be displayed ever
time the keys are pressed.
"---" indicates that a key is struck twice and also that input data is
not accepted.
time the keys are pressed.
"---" indicates that a key is struck twice and also that input data is
not accepted.
[KEY POSITION CODE]
<ALL KEY>
<ER-A450S STANDARD KEY BOARD LAYOUT>
4) Test termination
Change the mode switch position other than SRV position to termi-
nate the test.
nate the test.
The test terminates with the test and message printed
[3] R/J printer test
1) Key operation
2) Functional description
Five lines of special characters are printed as follows on the receipt
and the journal regardless of receipt (ON/OFF) switch setting.
and the journal regardless of receipt (ON/OFF) switch setting.
3) Check items
1. Check that the slanted lines of special characters are clearly
printed.
2. Check that the characters are printed at a uniform density.
3. Check the paper feed operation and the logo print.
4) Test termination
This check is terminated automatically.
The termination print is not performed.
The termination print is not performed.
[4] Keyboard test
1) Key operation
XXXX: Sumcheck data
Standard keyboard layout sumcheck data
ER-A450S
2314
2) Functional description
Keyboard test is performed with the sumcheck data of key code.
For sumcheck data, data are inputted to the upper upper four digits
befor the diagnostics code.
The data are compared with the added data which are added until the
final key (TL) is pressed. if the data agree with the added data, the
end print is made. If not, the error print is made.
The su check data is obtained by totalizing all key hardware codes
except for the (TL) key and converting the total into a decimal figure.
For sumcheck data, data are inputted to the upper upper four digits
befor the diagnostics code.
The data are compared with the added data which are added until the
final key (TL) is pressed. if the data agree with the added data, the
end print is made. If not, the error print is made.
The su check data is obtained by totalizing all key hardware codes
except for the (TL) key and converting the total into a decimal figure.
[ALL KEY LAYOUT]
68
67
58
77
78
66
55
56
57
48
38
R
J
63
62
61
52
51
40
45
35
46
47
37
74
43
33
42
32
41
31
30
76
75
36
28
27
14
23
24
22
72
21
71
70
15
05
16
18
04
13
03
12
02
11
01
00
26
25
06
08
65
17
07
60
49
20
10
68
67
58
77
78
66
65
55
56
57
48
38
R
J
63
62
61
52
51
40
45
35
46
47
37
74
43
33
42
32
41
31
30
76
75
36
28
27
14
23
24
22
72
21
71
70
15
05
16
18
04
13
03
12
02
11
01
00
26
25
06
08
1 0 1
102
TL
RECEIPT
JOURNAL
LOGO
XXXX 104
TL
44
43
3A 4D 4E
42
37
38
39
30
26
R
J
3F
3E 3D 34
33
28
2D 23
2E 2F
25
A4 2B 21
2A 20
29
1F
1E 4C 4B 24
1C 1B
0E 17
18
16
48
15
47
46
0F
05
10
12
04
0D 03
0C 02
0B 01
00
1A 19
06
08
41
11
07
3C
32
14
0A
5 – 2
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