Sharp ER-A770 (serv.man8) Service Manual ▷ View online
"Product & Test Diagnostics" is used only in the production
process, and must be not used in servicing.
process, and must be not used in servicing.
3-2. RAM Diagnostics
This diagnostics is used to test the standard RAM and the expansion
RAM.
RAM.
The following menu is displayed. The cursor position is highlighted.
Use key and key to move the cursor. Move the cursor to the
process you desire and press the enter key. The selected individual
diagnostics program is executed.
Use key and key to move the cursor. Move the cursor to the
process you desire and press the enter key. The selected individual
diagnostics program is executed.
1) Standard RAM Check
Check content
For the pseudo SRAM of the standard RAM 1MB, the following
check is performed. The memory contents will not be changed by
this check.
check is performed. The memory contents will not be changed by
this check.
The following processes are performed for the memory address
(700000H ~ 7FFFFFH) to be checked.
(700000H ~ 7FFFFFH) to be checked.
PASS1:
Memory data save
PASS2:
Data "0000H" write
PASS3:
Data "0000H" read/compare, data "5555H" write
PASS4:
Data "5555H" read/compare, data "AAAAH" write
PASS5:
Data "AAAAH" read/compare
PASS6:
Memory data writed the saved data
In case of a compare error in the check sequences of PASS1 ~
PASS6, an error display is made. If there is no error at all, the
check is normally terminated.
PASS6, an error display is made. If there is no error at all, the
check is normally terminated.
In addition, the following address check is performed.
In case of an error, an error display is made and read/write of the
address where the error occurred is repeated.
address where the error occurred is repeated.
Check point address = 700000H, 700001H
700002H, 700004H
700008H, 700010H
700020H, 700040H
700080H, 700100H
700200H, 700400H
700800H, 701000H
702000H, 704000H
708000H, 710000H
720000H, 740000H
780000H
700008H, 700010H
700020H, 700040H
700080H, 700100H
700200H, 700400H
700800H, 701000H
702000H, 704000H
708000H, 710000H
720000H, 740000H
780000H
Display
The screen displays the capacity of RAM in the unit of 64 KB.
The error address and the bit are displayed only when the error
occurs. (If the error does not occur, they are not displayed.)
occurs. (If the error does not occur, they are not displayed.)
Terminating procedure
After completion of check, press the CANCEL key.
2) UP-P02MB2 Check
Check content
The UP-P02MB2 presence check is performed in the following
procedure. The memory contents must not be changed by this
check.
procedure. The memory contents must not be changed by this
check.
55AAH is written into 9FFFFEH.
9FFFFEH is read and compared with 55AAH. If the both data
are correct, the following procedure is performed. The system
reads 9FFFFEH and compares it with 55AAH. If both data are
correct, the following tests will be performed. If not, the screen
displays the message "Extended RAM size : 0KB", and ends
the test.
are correct, the following procedure is performed. The system
reads 9FFFFEH and compares it with 55AAH. If both data are
correct, the following tests will be performed. If not, the screen
displays the message "Extended RAM size : 0KB", and ends
the test.
For the UP-P02MB2, the following check is performed.
The following processes are performed for the check address
(800000H ~ 9FFFFFH).
(800000H ~ 9FFFFFH).
PASS1:
Memory data save
PASS2:
Data "0000H" write
PASS3:
Data "0000H" read/compare, data "5555H" write
PASS4:
Data "5555H" read/compare, data "AAAAH" write
PASS5:
Data "AAAAH" read/compare
PASS6:
Memory data writed the saved data
In case of a compare error in the check sequences of PASS1 ~
PASS6, an error display is made. If there is no error at all, the
check is normally terminated.
PASS6, an error display is made. If there is no error at all, the
check is normally terminated.
In addition, the following address check is performed in the above
check sequence.
check sequence.
In case of an error, an error display is made and read/write of the
address where the error occurred is repeated without performing
the check.
address where the error occurred is repeated without performing
the check.
RAM Diagnostics
ROM & SSP Diagnostics
Clock & Keyboard & Clerk Diagnostics
Serial I/O Diagnostics
LCD Diagnostics
Rear & Pole Display Diagnostics
SRN Diagnostics
EFT Diagnostics
MCR Diagnostics
Drawer Diagnostics
Diagnostics End
ROM & SSP Diagnostics
Clock & Keyboard & Clerk Diagnostics
Serial I/O Diagnostics
LCD Diagnostics
Rear & Pole Display Diagnostics
SRN Diagnostics
EFT Diagnostics
MCR Diagnostics
Drawer Diagnostics
Diagnostics End
ER-A770 Diagnostics V 1.0A
Product & Test Diagnostics
RAM Diagnostics
UP-P02MB2 Check
Standard RAM Check
Standard RAM Check
Standard memory size : 1024KB PASS!!(or ERROR!!)
Error Address xxxxxxH
Write Data xxxxH
Read Data xxxxH
Write Data xxxxH
Read Data xxxxH
Check point address = 800000H,800001H
800002H,800004H
800008H,800010H
800020H,800040H
800080H,800100H
800200H,800400H
800800H,801000H
802000H,804000H
808000H,810000H
820000H,840000H
880000H,900000H
800008H,800010H
800020H,800040H
800080H,800100H
800200H,800400H
800800H,801000H
802000H,804000H
808000H,810000H
820000H,840000H
880000H,900000H
Display
The screen displays the capacity of RAM in the unit of 64 KB.
The error address and the bit are displayed only when the error
occurs. (If the error does not occur, they are not displayed.)
occurs. (If the error does not occur, they are not displayed.)
Terminating procedure
After completion of check, press the CANCEL key.
3-3. ROM & SSP Diagnostics
The standard ROM and the service ROM are checked. The SSP
circuit is also checked.
circuit is also checked.
The following menu is displayed. The cursor position is highlighted.
Use key and key to move the cursor. Move the cursor to the
process you desire and press the enter key. The selected individual
diagnostics program is executed.
Use key and key to move the cursor. Move the cursor to the
process you desire and press the enter key. The selected individual
diagnostics program is executed.
1) Standard ROM Check
Check contents
The standard ROM area (200000H ~ 3FFFFFH) is added in the
unit of byte. If the lower two digits of the result is 20H, it is normal.
The ROM version and the model name code which are stored in
address 31FFE0H ~ 31FFEFH where the ROM version and the
check sum correction data are stored are displayed. The format of
data (ASCII) to be stored is as follows:
unit of byte. If the lower two digits of the result is 20H, it is normal.
The ROM version and the model name code which are stored in
address 31FFE0H ~ 31FFEFH where the ROM version and the
check sum correction data are stored are displayed. The format of
data (ASCII) to be stored is as follows:
31FFE0H ~ 31FFEFH: Model name code (example: ER-A770.
Display is made up to 00H of data.)
Display is made up to 00H of data.)
31FFF0H ~ 31FFF9H: 27801R****(****=PROGRAM VERSION)
31FFFAH ~ 31FFFBH: BLOCK NO. ("20" ~ "3F")
31FFFCH: TERMINATOR ("=")
31FFFDH ~ 31FFFEH: BLOCK VERSION (example "00")
31FFFFH: CHECK SUM CORRECTION DATA
The flash ROM used as the standard ROM has rewriting block of
64KB as the unit. To control the version in each block, the compo-
sition is the same as the above 31FFF0H or later and arranged in
each 64KByte. At that time, correction is made so that the sum of
64KB as the unit. To control the version in each block, the compo-
sition is the same as the above 31FFF0H or later and arranged in
each 64KByte. At that time, correction is made so that the sum of
each block becomes 01H, and the total of 2MByte is 20H.
The program version of the IPL is displayed so that 0PAGE
(BLOCK) where the IPL is stored is individually controlled.
(BLOCK) where the IPL is stored is individually controlled.
Display
The screen displays the capacity of RAM in the unit of 64 KB.
Terminating procedure
After displaying the check result, press the CANCEL key to termi-
nate the check.
nate the check.
2) SERVICE ROM Check
Check content
For the SERVICE ROM area (D00000H ~ EFFFFFH) consisting of
two EPROMs, addition is made in the unit of byte for each chip.
The lower two digits of the result are 10H, it is regarded as normal.
two EPROMs, addition is made in the unit of byte for each chip.
The lower two digits of the result are 10H, it is regarded as normal.
The ROM version and the model name code which are stored in
address D1FFE0H ~ D1FFFFH where the ROM version and the
check sum correction data are stored are displayed. The format of
data (ASCII) to be stored is as follows:
address D1FFE0H ~ D1FFFFH where the ROM version and the
check sum correction data are stored are displayed. The format of
data (ASCII) to be stored is as follows:
D1FFE0H ~ D1FFEFH: Model name code (example: ER-A770.
Display is made up to 00H of data.)
Display is made up to 00H of data.)
D1FFF0H ~ D1FFF9H: 27801R****(****=PROGRAM VERSION)
D1FFFAH ~ D1FFFBH: BLOCK NO. ("20" ~ "2F")
D1FFFCH: TERMINATOR ("=")
D1FFFDH ~ D1FFFEH: BLOCK VERSION (example "00")
D1FFFFH: CHECK SUM CORRECTION DATA
This SERVICE ROM allows to write into the FLASH ROM when
re-execution is impossible because of an abnormality during re-
writing into the FLASH ROM. The composition is the same as the
standard ROM.
re-execution is impossible because of an abnormality during re-
writing into the FLASH ROM. The composition is the same as the
standard ROM.
The program version of the IPL is displayed so that 0PAGE
(BLOCK) where the IPL is stored is individually controlled.
(BLOCK) where the IPL is stored is individually controlled.
Display
The screen displays the capacity of RAM in the unit of 64 KB.
Terminating procedure
After displaying the check result, press the CANCEL key to termi-
nate the check.
nate the check.
UP-P02MB2 Check
Extended RAM size : 2048KB PASS!!(or ERROR!!)
Error Address xxxxxxH
Write Data xxxxH
Read Data xxxxH
Write Data xxxxH
Read Data xxxxH
ROM & SSP Check
Service ROM Check
SSP Check
SSP Check
Standard ROM Check
Standard ROM Sum Check : PASS!!(or ERROR!!)
IPL PROGRAM Version
**
IPL PROGRAM Version
**
APL PROGRAM Version
←
Displays the version.
27801R**** ER-A770
27801R**** ER-A770
BLOCK Version
20=**,21=**,22=**,23=**,24=**,25=**,26=**,27=**
28=**,29=**,2A=**,2B=**,2C=**,2D=**,2E=**,2F=**
:
27801R**** ER-A770
BLOCK Version
20=**,21=**,22=**,23=**,24=**,25=**,26=**,27=**
28=**,29=**,2A=**,2B=**,2C=**,2D=**,2E=**,2F=**
:
Standard ROM Sum Check : PASS!!(or ERROR!!)
IPL PROGRAM Version
**
IPL PROGRAM Version
**
APL PROGRAM Version
←
Displays the version.
27801R**** ER-A770
27801R**** ER-A770
BLOCK Version
20=**,21=**,22=**,23=**,24=**,25=**,26=**,27=**
28=**,29=**,2A=**,2B=**,2C=**,2D=**,2E=**,2F=**
:
27801R**** ER-A770
BLOCK Version
20=**,21=**,22=**,23=**,24=**,25=**,26=**,27=**
28=**,29=**,2A=**,2B=**,2C=**,2D=**,2E=**,2F=**
:
3) SSP Check
Check content
By starting this check program, the SSP setting for checking is
automatically performed and the SSP check is executed and the
result is displayed.
automatically performed and the SSP check is executed and the
result is displayed.
The SSP check sets data for check in the vacant space in the
SSP entry register, and deletes the data for check after comple-
tion of checking. Therefore, the already set data are not changed
by this check.
SSP entry register, and deletes the data for check after comple-
tion of checking. Therefore, the already set data are not changed
by this check.
Display
Terminating procedure
After displaying the check result, press the CANCEL key to termi-
nate the check.
nate the check.
3-4. Timer & Keyboard & Clerk Switch Diagnostics
The operation of the clock crystal of CKDC, the keyboard, and the
clerk switch are tested.
clerk switch are tested.
When the CANCEL key is pressed, the display returns to the diagnos
tics menu.
tics menu.
1) Timer Check
Check content
The operation of the clock crystal of CKDC9 is checked.
The screen displays "YY/MM/DD & MM:HH:SS". Make sure that
the time displayed is updated.
the time displayed is updated.
2) Keyboard Check
Check content
The A770 main body keyboard input test is performed. The posi-
tion code corresponding to the inputted key is displayed in three
digits. The key layout corresponding to the input is displayed on
the LCD screen. Press the corresponding key to input. The display
of the inputted key is changed from white square to black
square and a catch sound is generated.
tion code corresponding to the inputted key is displayed in three
digits. The key layout corresponding to the input is displayed on
the LCD screen. Press the corresponding key to input. The display
of the inputted key is changed from white square to black
square and a catch sound is generated.
3) Clerk SW Check
Check content
The code of the key which is inserted into the clerk key switch is
displayed in a decimal number.
displayed in a decimal number.
3-5. RS232 I/F Diagnostics
The main PWB and the option PWB (RS232 interface of ER-A7RS)
are checked. Attach the 9-pin D-Sub loop back connector (UKOG-
6717RCZZ) of wiring in Fig. 3-11.
are checked. Attach the 9-pin D-Sub loop back connector (UKOG-
6717RCZZ) of wiring in Fig. 3-11.
Fig. 3-11. Wiring diagram of loop back connector (UKOG-6717RCZZ)
The following menu is displayed. The cursor position is highlighted.
Use key and key to move the cursor. Move the cursor to the
process you desire and press the enter key. The selected individual
diagnostics program is executed. When the CANCEL key is pressed,
the display returns to the diagnostics menu.
Use key and key to move the cursor. Move the cursor to the
process you desire and press the enter key. The selected individual
diagnostics program is executed. When the CANCEL key is pressed,
the display returns to the diagnostics menu.
When setting channels of RS232, do not set two or more ports to
one channel. In the ER-A750, max. two units of ER-A7RS can be
installed. In each PWB, do not set two or more ports to the same
channel. If two or more ports should be set to one channel, the
hardware would be destroyed.
one channel. In the ER-A750, max. two units of ER-A7RS can be
installed. In each PWB, do not set two or more ports to the same
channel. If two or more ports should be set to one channel, the
hardware would be destroyed.
1) CHANNEL Check
Check content
The CHANNEL setting of the connected RS232 is displayed. The
display content and the setting of DIP SW for CHANNEL setting
on the RS232 I/F PWB are compared.
display content and the setting of DIP SW for CHANNEL setting
on the RS232 I/F PWB are compared.
Since the RS232 on the main PWB of the ER-A770 is fixed to
CH1 and CH8, that in the ER-A7RS must be set to CH2 ~ CH7.
CH1 and CH8, that in the ER-A7RS must be set to CH2 ~ CH7.
(Reference) ER-A7RS CHANNEL setting (In the table below, "1" =
SW OFF, "0" = SW ON.)
SSP Check
SSP (NMI) Check : PASS!!(ERROR!!)
Timer & Keyboard & Clerk SW Diagnostics
DATA & TIME = YY/MM/DD & HH:MM:SS
KEY CODE = *** CLERK CODE = ***
CD
1pin
2pin
3pin
4pin
5pin
6pin
7pin
8pin
9pin
RD
SD
ER
GND
DR
RS
CS
CI
RS232 I/F Diagnostics
CH1 Check
CH2 Check
CH3 Check
CH4 Check
CH5 Check
CH6 Check
CH7 Check
CH8 Check
CH2 Check
CH3 Check
CH4 Check
CH5 Check
CH6 Check
CH7 Check
CH8 Check
CHANNEL Check
RS232 I/F Diagnostics
CHANNEL Check
CH1 = exist!
←
Display when channel present
CH2 = exist!
CH3 = none!
←
Display when no channel
CH4 = none!
CH5 = none!
CH6 = none!
CH7 = none!
CH5 = none!
CH6 = none!
CH7 = none!
ER-A7RS CON3
S1-1
S1-2
S1-3
CHANNEL
0
0
0
Invalid
0
0
1
CHANNEL 1: Impossible to set
0
1
0
CHANNEL 2:
0
1
1
CHANNEL 3
1
0
0
CHANNEL 4
1
0
1
CHANNEL 5
1
1
0
CHANNEL 6
1
1
1
CHANNEL 7
ER-A7RS CON3
S1-4
S1-5
S1-6
CHANNEL
0
0
0
Invalid
0
0
1
CHANNEL 1: Impossible to set
0
1
0
CHANNEL 2
0
1
1
CHANNEL 3
1
0
0
CHANNEL 4
1
0
1
CHANNEL 5
1
1
0
CHANNEL 6
1
1
1
CHANNEL 7
Terminating procedure
Press the CANCEL key to terminate the check.
2) CH1 Check
Check content
When the channel is not set, an error display is made (ER-
ROR:CH1). When the channel is set, the following check is performed.
ROR:CH1). When the channel is set, the following check is performed.
Control signal check
ERn
RSn
DRn
CIn
CDn
CSn
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
ON
ON
OFF
ON
ON
OFF
OFF
ON
ON
ON
ON
ON
ON
The read check of the above inputs and the interruption check of
CS, CI, and CD are performed.
CS, CI, and CD are performed.
In the read check, ER and RS are changed over in the above
sequence and the logic states of DR, CI, CD, and CS are
checked.
sequence and the logic states of DR, CI, CD, and CS are
checked.
If the logic differs from that in the table, an error display is made.
"ON" in the table means Active LOW, and "OFF" means Active
HIGH.
HIGH.
In the interruption check, an interruption of CS, CI, or CD is
allowed one by one. (MASK is canceled.)
allowed one by one. (MASK is canceled.)
If an interruption is not made when each signal is active, or if an
interruption is made when each signal is not active, an error
display is made.
interruption is made when each signal is not active, an error
display is made.
The above check is repeated four cycles.
Data transfer check
The loop back data (256 bytes) of 00H ~ 0FFH are used for data
transfer check. The baud rate is set to 38400BPS.
transfer check. The baud rate is set to 38400BPS.
Timer check (RS232 on board timer)
Before performing the check, set the timer to RCVDT start and
5ms. Then perform the following procedure.
5ms. Then perform the following procedure.
During execution of the check, TRQ- must not be generated.
After 5ms from completion of the check, TRQ- must be gener-
ated.
ated.
Display
All the contents of an error must be displayed.
ERROR
No.
ERROR display
ERROR content
1
ER-DR:ERROR
ER-DR LOOP ERROR
2
ER-CI:ERROR
ER-CI LOOP ERROR
3
RS-CD:ERROR
RS-CD LOOP ERROR
4
RS-CS:ERROR
RS-CS LOOP ERROR
5
CI INT:ERROR
CI interruption is not made.
6
CD INT:ERROR
CD interruption is not made.
7
CS INT:ERROR
CS interruption is not made.
8
TXEMP:ERROR
TXEMP is not set.
9
TXEMP INT:ERROR
TXEMP interruption is not made.
10
TXRDY:ERROR
TXRDY interruption is not made.
11
TXRDY INT:ERROR
TXRDY interruption is not made.
12
RCVRDY:ERROR
RCVRDY is not set.
(Reception enabled. TR-Q is
generated during check)
(Reception enabled. TR-Q is
generated during check)
13
RCVRDY INT:ERROR RCVRDY interruption is not made.
14
SD-RD:ERROR
SD-RD LOOP ERROR
(DATA ERROR)
(DATA ERROR)
15
SD-RD:ERROR
SD-RD LOOP ERROR (DATA
ERROR
ERROR
16
TIMER:ERROR
TIMER ERROR (TMRQ is not set
after completion of check.)
after completion of check.)
17
TIMER INT:ERROR
TRQ-1 interruption is not made.
Terminating procedure
Press the CANCEL key to terminate the check.
3) CH2 Check
Check content
The check procedure, the display, and the terminating procedure
are the same as CH1 Check.
are the same as CH1 Check.
4) CH3 Check
Check content
The check procedure, the display, and the terminating procedure
are the same as CH1 Check.
are the same as CH1 Check.
5) CH4 Check
Check content
The check procedure, the display, and the terminating procedure
are the same as CH1 Check.
are the same as CH1 Check.
6) CH5 Check
Check content
The check procedure, the display, and the terminating procedure
are the same as CH1 Check.
are the same as CH1 Check.
7) CH6 Check
Check content
The check procedure, the display, and the terminating procedure
are the same as CH1 Check.
are the same as CH1 Check.
RS232 CH1 Check
ER-DR : ERROR!!
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