Sharp ER-A490 (serv.man2) Service Manual ▷ View online
CHAPTER 3. SRV. RESET AND
MASTER RESET
MASTER RESET
1. SRV. reset (Program Loop Reset)
Used to return the machine back to its operational state after a lock-
up has occurred.
up has occurred.
Procedure
•
Method 1
1) Unplug the AC cord from the wall outlet.
2) Set the mode switch to (SRV
′
) position.
3) Plug in the AC cord to the wall outlet.
4) Turn to (SRV) position from (SRV
′
) position.
•
Method 2
1) Set the mode switch to PGM2 position.
2) Turn off the AC switch.
3) While holding down JOURNAL FEED key and RECEIPT FEED
key, Turn on the AC switch.
Note: When disassembling and reassembling always power up using
method 1 only. Method 2 will not reset the CKDC6.
Note: SRV programming job#926-B must be set to "4" to allow PGM
program loop reset.
2. Master reset (All memory clear)
There are two possible methods to perform a master reset.
•
MRS-1
Used to clear all memory contents and return machine back to its
initial settings and return keyboard back to default keyboard.
initial settings and return keyboard back to default keyboard.
Procedure
1) Unplug the AC cord from the wall outlet.
2) Set the MODE switch to the (SRV
′
) position.
3) Plug in the AC cord to the wall outlet.
4) While holding down JOURNAL FEED key, turn to (SRV) position
from (SRV
′
) position.
•
MRS-2
Used to clear all memory and keyboard contents.
This reset returns all programming back to defaults. The keyboard
must be entered by hand.
This reset is used if an application needs different keyboard layout
other than that supplied by a normal MRS-1.
Used to clear all memory and keyboard contents.
This reset returns all programming back to defaults. The keyboard
must be entered by hand.
This reset is used if an application needs different keyboard layout
other than that supplied by a normal MRS-1.
Procedure
1) Unplug the AC cord from the wall outlet.
2) Set the MODE switch to the (SRV
′
) position.
3) Plug in the AC cord to the wall outlet.
4) While holding down JOURNAL FEED key and RECEIPT FEED
key, turn to (SRV) position from (SRV
′
) position.
5) Key position assignment:
*
After the execution of MRS-2, only the RECEIPT FEED and JOUR-
NAL FEED keys can remain effective on key assignment. Any key
can be assigned on any key position on the main keyboard.
NAL FEED keys can remain effective on key assignment. Any key
can be assigned on any key position on the main keyboard.
[key setup procedure]
NOTES:
*
1:
When the 0 key is pressed, the key of the key number on display
is disabled.
is disabled.
*
2:
Push the key on the position to be assigned. With this, the key of
the key number on display is assigned to that key position.
the key number on display is assigned to that key position.
Key number
Key name
Key number
Key name
1
Numeric key "0"
9
Numeric key "8"
2
Numeric key "1"
10
Numeric key "9"
3
Numeric key "2"
11
Numeric key "00"
4
Numeric key "3"
13
Decimal point key
5
Numeric key "4"
14
CL key
6
Numeric key "5"
15
⊗
key
7
Numeric key "6"
16
ST key
8
Numeric key "7"
17
TL key
MRS-2
executed
executed
Key position set
Free key
Disable
Free key setup
complete.
complete.
*2
*1
0
0
– 8 –
CHAPTER 4. HARDWARE DESCRIPTION
1. Hard ware block diagram
Fig. 1-1
CPU
GATE ARRAY
MPCA6
DRAWER
PRINTER PR-58M
STANDARD
RAM1
32KB
OPTIONAL
RAM2
MAX.512KB
ER-03RA:512KB
ER-02RA:128KB
ER-02RA:128KB
STANDARD
ROM
512KB
OPTIONAL
ROM
128KB
ER-A49R1
SWITCH
KEY BOARD
RS232
I/F
2 ports
ER-A5RS
OPT CN
CKDC6
1 LINE
7SEG 7DIG
7SEG 7DIG
2 LINE
5 x 7DOT 12DIG
7SEG 10DIG
5 x 7DOT 12DIG
7SEG 10DIG
CUSTOMER DISPLAY
OPERATER DISPLAY
I/R
UNIT
UNIT
Other ECR
or ER-02FD
or ER-02FD
TPRC1
x2
9
2. Description of main LSI’s
2-1. CPU (HD6415108-10)
1) Pin configuration
HD6415108-10 pin configuration
Fig. 2-1
RES
NMI
VSS
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
VSS
A0
A1
A2
A3
A4
A5
A6
A7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
ST
B
Y
MD
2
MD
1
MD
0
VC
C
RF
SH
LW
R
HW
R
RD
AS
E
VS
S
XTAL
EX
T
A
L
VSS
TX
D
2
RXD
2
TXD
1
RX
D1
SCK2
UA
S
K
C
IR
Q
1
IR
Q
0
VC
C
AV
C
C
AN
3
AN
2
11
2
111
11
0
10
9
108
107
106
10
5
104
103
10
2
101
10
0
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
P41
P42
P43
P44
P45
P46
P47
VSS
P50
P51
P52
P53
P54
P55
P56
P57/STOP
P60
P61
P62
P63
P64
P65
P66
P67
VSS
AVSS
AN0
AN1
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
78
80
81
82
83
84
A8
A9
A1
0
A1
1
A1
2
A1
3
A1
4
A1
5
VS
S
A1
6
A1
7
A1
8
A1
9
A2
0
A2
1
A2
2
A2
3
VS
S
WA
IT
BA
C
K
BR
E
Q
P3
3
P3
4
P3
5
P3
6
P3
7
VCC
P4
0
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
X
10
2) Block diagram
Fig. 2-2
P47
FTI2
P45
FTI1
P43
P42
P41/TMCI
P40
P37
P36
P35
P34
P33
BREQ
BACK
WAIT
P27/A23
P26/A22
P25/A21
P24/A20
P23/A19
P22/A18
P21/A17
P20/A16
A15
A14
A13
A14
A13
A12
A11
A10
A11
A10
A9
A8
A7
A6
A5
A8
A7
A6
A5
A4
A3
A3
A2
A1
A0
A0
VCC
VCC
VCC
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
AVCC
AVSS
MD2
MD1
MD0
RES
STBY
NMI
AS
RD
HWR
LWR
RFSH
EXTAL
XTAL
E
D7
D6
D5
D4
D3
D2
D1
D0
D1
5
D1
4
D1
3
D1
2
D1
1
D1
0
D9
D8
STO
P
/P
5
7
P5
6
FM
R
S
P5
4
P5
3
P5
2
P5
1
P5
0
P6
7
P6
6
RS
/P
6
5
RR/
P
6
4
CD/
P
6
3
CS
/P
6
2
DR/
P
6
1
ER
/P6
0
P7
3
AN
2
AN
1
AN
0
TXD
2
RX
D
2
TXD
1
RX
D
1
SC
K2
IRQ
2
IRQ
1
IRQ
0
H8/500 CPU
DTC
Serial
communication
interface x 2ch
communication
interface x 2ch
8bit timer
16bit free running
timer x 2ch
timer x 2ch
Refresh controller
Wait state
controller
controller
A/D convertor
Interruption controller
Clock
oscillator
oscillator
Watch
dog timer
dog timer
Data bus
Port 1
D
a
ta bu
s (L
ow
er)
D
a
ta bu
s (U
pp
er)
A
d
dr
es
s
bus
Po
rt
2
Po
rt
3
Po
rt
4
Port 5
Port 6
Port 7
Port 8
A
ddr
es
s
bus
X
11
Click on the first or last page to see other ER-A490 (serv.man2) service manuals if exist.