Sharp ER-A490 (serv.man2) Service Manual ▷ View online
Fig. 11-1
By switching VIN (+28.8V) by the transistor TR1 within the STR2024,
DC+24V supply is obtained through the LC network. Stable +24V is
obtained by controlling on/off duty of TR1.
DC+24V supply is obtained through the LC network. Stable +24V is
obtained by controlling on/off duty of TR1.
ION:
Current when TR1 is on.
IOFF: Current when TR1 is off.
12. I/R communication circuit
•
In the ER-A490, infra-red data transmission of the optical commu-
nication system is performed.
nication system is performed.
VIN
+28.8V
+
4700µ
63V
5
VIN
TR1
Refer-
ence
voltage
circuit
3
2
4
1
L1 220µ H
IOFF
ION
+24V
+24V
Load
C2
2200µ F
35V
2200µ F
35V
R2
STR2024
32
Reception circuit
The infra-red signals which was transmitted from the transmission unit
through the air is received by the photo diode, and sent through the
two-system circuit to the MPCA6, where they are modulated and in-
putted to the CPU.
through the air is received by the photo diode, and sent through the
two-system circuit to the MPCA6, where they are modulated and in-
putted to the CPU.
Transmission circuit
With the IRTX signal from the MPCA6, Q2 is turned on/off to light
LED1, 2. To strengthen the light intensity, two LED’s are used.
LED1, 2. To strengthen the light intensity, two LED’s are used.
PD
Amplifier
Band-pass
filter
filter
Hysteresis
comparator
comparator
ASK
AGC
Amplifier
Amplifier
Bypass
filter
filter
Hysteresis
comparator
comparator
IRDA
/REMOCON
/REMOCON
+5V
R67
R70
IC1A
R69
C49
C61
R51
R52
R53
IRDA
/REMOCON
/REMOCON
MPCA6
C45
Q2
R54
R55
R68
PD1
R56
MPCA6
R56
PD1
R56
R57
C46
R58
R68
R59
Q2
C47
R60
C48
R62
R61
C49
R66
R64
R63
R69
R70
R67
IC1B
C50
R65
+5V
ASK
Q2
LED2
LED1
R72
+5V
R71
IRTX
MPCA6
33
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-A490.
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-A490.
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, VRAM, VCKDC, POFF, +12.5V, +24V).
b) CPU input/output pins, CPU internal logic, CKDC6, MPCA6,
TPRC1, system bus and common ROM/RAM must be working
properly.
properly.
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
→
TL 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 command entry, the test starts.
Code
Description
100
Display test-1
101
Key, Clerk, and switch position code display
102
R/J printer test
104
Keyboard test
105
Mode switch test
106
Paper end sensor and near end sensor test
108
Calendar oscillator test
109
SSP test
110
Drawer open sensor test
111
Remote drawer open sensor test
116
Display test 2
117
I/R interface test: Checker side
118
I/R interface test: Tested machine side
119
CG print
120
Standard RAM test
130
Standard ROM test
151
A/D conversion check
200
Option RAM test: For ER-02RA
201
Option RAM test: For ER-03RA
400
Option ROM test: For ER-A49R2
600 - 604 Fiscal memory blank check (Not for fild service use)
750 - 781 Fiscal memory unit read/write check (For fild service use)
850 - 881 Fiscal memory unit read check
900 - 964 Fiscal memory dump (For fild service use)
[1] Display test-1
1
Key operation
100
→
TL
2
Functional description
The following is displayed:
The following is displayed:
Front display
3
Check the following items:
a) Check for proper activation of display elements.
b) Check for blur, uneven illumination, and partial omission.
4
Test termination
Press any key. The test terminates with the test and message
printed.
Press any key. The test terminates with the test and message
printed.
100
Test termination print
[2] Key, clerk, and switch position code display
1
Key operation
101
→
TL
2
Functional description
Key, clerk, and receipt switch codes are displayed.
Key, clerk, and receipt switch codes are displayed.
3
Check the following items:
Change key and switch positions for proper display activation.
Change key and switch positions for proper display activation.
Clerk code:
1 hole clerk key (ER-A5CL)
000 (off state)
001 (Clerk 1)
002 (Clerk 2)
001 (Clerk 1)
002 (Clerk 2)
*
255 (Clerk 255)
MRS SW:
00 (ON state)
01 (OFF state)
01 (OFF state)
Key code:
--- (simultaneous two key)
depression, invalid entry)
depression, invalid entry)
KEY POSITION CODE
ER-A490 (Flat key) 15 x 8
↑
R
↑
J 022 030 038 046 054 062 070 078 086 094 102 110 118
007 014 021 029 037 045 053 061 069 077 085 093 101 109 117
006 013 020 028 036 044 052 060 068 076 084 092 100 108 116
005 012 019 027 035 043 051 059 067 075 083 091 099 107 115
004 011 018 026 034 042 050 058 066 074 082 090 098 106 114
003 010 017 025 033 041 049 057 065 073 081 089 097 105 113
002 009 016 024 032 040 048 056 064 072 080 088 096 104 112
001 008 015 023 031 039 047 055 063 071 079 087 095 103 111
1 2 3 4 5 6 7 8 9 0
7-SEGMENT DISPLAY:
1 2 3 4 5 6 7 8 9 0
DOT DISPLAY:
A B
4 5 6 7 8 9 0
Operator display
C
L K s w K E Y
S
DOT DISPLAY:
R V
Key code
7-SEGMENT DISPLAY:
Clerk code
– 33 –
4
Test termination
Change the MODE switch position other than SRV position to
terminate the test. The test termination message is printed.
Change the MODE switch position other than SRV position to
terminate the test. The test termination message is printed.
101
Test termination print
[3] R/J printer test
1
Key operation
102
→
TL
2
Content
Five lines of special characters are printed as follows on the re-
ceipt and the journal regardless of receipt (ON/OFF) switch set-
ting.
Five lines of special characters are printed as follows on the re-
ceipt and the journal regardless of receipt (ON/OFF) switch set-
ting.
3
Check content
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. Check the partial cut and the full cut. (Only for the printer with
auto cutter)
4
Termination
This check is terminated automatically.
The termination print is not performed.
This check is terminated automatically.
The termination print is not performed.
[4] Keyboard test
1
Key operation
✕✕✕✕
104
→
TL
XXXX: Sumcheck data
Standard key layout sumcheck data
ER-A490
7449
2
Details of test
Keyboard check is performed with the sum check data of key
code.
For sum check data, data are inputted to the upper four digits
before 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.
Keyboard check is performed with the sum check data of key
code.
For sum check data, data are inputted to the upper four digits
before 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 sum check data is obtained by totalizing all key hardware
codes except for the (TL) key and converting the total into a deci-
mal figure.
codes except for the (TL) key and converting the total into a deci-
mal figure.
ER-A490 KEY HARDWARE CODE
1. SUM CHECK DATA = 0F+06+05+04+00+
⋅⋅⋅⋅⋅
= 1D0E = 7449
↑
R
↑
J
0F 06
05
04
00
01
07 0B 0A 09
08 0C 0D
4F 46
45
44
40
41
42
43
47 4B 4A 49
48 4C 4D
3F 36
35
34
30
31
32
33
37 3B 3A 39
38 3C 3D
2F 26
25
24
20
21
22
23
27 2B 2A 29
28 2C 2D
1F 16
15
14
10
11
12
13
17 1B 1A 19
18 1C 1D
5F 56
55
54
50
51
52
53
57 5B 5A 59
58 5C 5D
6F 66
65
64
60
61
62
63
67 6B 6A 69
68 6C 6D
7F 76
75
74
70
71
TL
73
77 7B 7A 79
78 7C 7A
2. ALL KEY LAYOUT
↑
R
↑
J
0F 06
05
04
00
01
07 0B 0A 09
08 0C 0D
4F 46
45
44
40
41
42
43
47 4B 4A 49
48 4C 4D
3F 36
35
34
30
31
32
33
37 3B 3A 39
38 3C 3D
2F 26
25
24
20
21
22
23
27 2B 2A 29
28 2C 2D
1F 16
15
14
10
11
12
13
17 1B 1A 19
18 1C 1D
5F 56
55
54
50
51
52
53
57 5B 5A 59
58 5C 5D
6F 66
65
64
60
61
62
63
67 6B 6A 69
68 6C 6D
7F 76
75
74
70
71
72
73
77 7B 7A 79
78 7C 7D
3
Check item
A) Check the display in the test and the content of end print.
4
Test end
k
k
k
k
104
E - -
k
k
k
k
104
Sum check data
Added sum check data
Normal end
Error
[5] Mode switch test
1
Key operation
105
→
TL
2
Details of test
3
Check item
A) Check of the display in the test and the content of end print.
4
Test end
RECEIPT
JOURNAL
LOGO
Patial cut
Full cut
K
E Y
T E S T
S
DOT DISPLAY:
R V
Key code
7-SEGMENT DISPLAY:
1
0 4
1
0 5
X
7-SEGMENT DISPLAY:
M
O D E
S W
S
DOT DISPLAY:
R V
0~7,E,F
MODE:
x:
0
1
2
(E)
3
4
5
SRV
PGM1
OP/XZ
X1/Z1
X2/Z2
PGM2
REG
7
REG
MGR
0
SRV
6
– 34 –
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