Sharp ER-A850 (serv.man2) Service Manual ▷ View online
i.
Data 55H is written into I/O address 378H, and the same
address is read. If the read data is not 55H, "LPT1 channel
Disabled" is displayed, and the following procedures are not
performed.
address is read. If the read data is not 55H, "LPT1 channel
Disabled" is displayed, and the following procedures are not
performed.
ii.
Characters of 20H
∼
7FH are printed by the printer and return-
ing to the head of a line is performed. This procedure is re-
peated 5 times.
peated 5 times.
2
Display
LPT1 Print Check
LPT1 Channel Disabled
"LPT1 Channel Disabled" is displayed only when LPT1 is not ac-
cessible.
cessible.
3
Exiting
Pressing the Esc key will exit from this check mode.
Pressing the Esc key will exit from this check mode.
5) LPT2 Print Check
1
Check contents
Print check is performed to LPT1 at I/O address 278H
Print check is performed to LPT1 at I/O address 278H
∼
27FH.
For print check, set the short pins of the ER-A8RS to be checked
as shown in Fig. 3-8, connect the D-Sub 25-pin connector to the
printer, and set the printer ready for print check.
as shown in Fig. 3-8, connect the D-Sub 25-pin connector to the
printer, and set the printer ready for print check.
Fig. 3-8 Jumper pin setting
The test procedures are as follows:
i.
Data 55H is written into I/O address 278H, and the same
address is read. If the read data is not 55H, "LPT2 channel
Disabled" is displayed, and the following procedures are not
performed.
address is read. If the read data is not 55H, "LPT2 channel
Disabled" is displayed, and the following procedures are not
performed.
ii.
Characters of 20H
∼
7FH are printed by the printer and return-
ing to the head of a line is performed. This procedure is re-
peated 5 times.
peated 5 times.
2
Display
LPT2 Print Check
LPT2 Channel Disabled
"LPT2 Channel Disabled" is displayed only when LPT2 is not ac-
cessible.
cessible.
6) LPT3 Print Check
1
Check contents
Print check is performed to LPT1 at I/O address 3BCH
Print check is performed to LPT1 at I/O address 3BCH
∼
3BEH.
For print check, set the short pins of the ER-A8RS to be checked
as shown in Fig. 3-9, connect the D-Sub 25-pin connector to the
printer, and set the printer ready for print check.
as shown in Fig. 3-9, connect the D-Sub 25-pin connector to the
printer, and set the printer ready for print check.
Fig. 3-9 Jumper pin setting
The test procedures are as follows:
i.
Data 55H is written into I/O address 3BCH, and the same
address is read. If the read data is not 55H, "LPT3 channel
Disabled" is displayed, and the following procedures are not
performed.
address is read. If the read data is not 55H, "LPT3 channel
Disabled" is displayed, and the following procedures are not
performed.
ii.
Characters of 20H
∼
7FH are printed by the printer and return-
ing to the head of a line is performed. This procedure is re-
peated 5 times.
peated 5 times.
2
Display
LPT3 Print Check
LPT3 Channel Disabled
"LPT3 Channel Disabled" is displayed only when LPT2 is not ac-
cessible.
cessible.
3
Exiting
Pressing the Esc key will exit from this check mode.
Pressing the Esc key will exit from this check mode.
3-9. Serial I/O Diagnostics
This diagnostics is used to test serial interface of the main PWB and
the ER-A8RS (option).
Connect 9-pin D-Sub loop back connector (UKOG-6717RCZZ) shown
in Fig. 3-10 to the port to be checked.
the ER-A8RS (option).
Connect 9-pin D-Sub loop back connector (UKOG-6717RCZZ) shown
in Fig. 3-10 to the port to be checked.
Fig. 3-10 Loop Back Connector (UKOG-6717RCZZ) Wiring Diagram
The display shows the following menu. The highlighted cursor is
moved with the cursor up key (
moved with the cursor up key (
↑
) and the cursor down key (
↓
) of the
AT key. Move the cursor to the diagnostics item to be executed, then
press the Enter key, and the selected individual diagnostics program
will be executed. After completion of an individual diagnostics pro-
gram, the display returns to the menu screen. To exit from the diag-
nostics mode, press the Esc key, and the display will return to the
service-man diagnostics menu screen.
press the Enter key, and the selected individual diagnostics program
will be executed. After completion of an individual diagnostics pro-
gram, the display returns to the menu screen. To exit from the diag-
nostics mode, press the Esc key, and the display will return to the
service-man diagnostics menu screen.
1
2
3
2
3
J1
9
1
0
J4
J3
1
2
3
2
3
J1
9
1
0
J4
J3
CD
1pin
2pin
3pin
4pin
5pin
6pin
7pin
8pin
9pin
RD
TD
DTR
GND
DSR
RTS
CTS
RI
– 17 –
Serial I/O Diagnostics
COM1 Check
COM2 Check
COM3 Check
COM4 Check
COM5 Check
COM6 Check
1) COM1 Check
1
Check contents
Loop back check is performed to UART at I/O address 3F8H
Loop back check is performed to UART at I/O address 3F8H
∼
3FFH. The test procedures are as follows:
i.
UART setting is made. If UART is not accessible, "COM1
Disabled" is displayed and the following procedures are not
performed.
Disabled" is displayed and the following procedures are not
performed.
ii.
The RTS signal is turned on/off to check the operation of the
CD signal and the CTS signals. In case of an error, "ERROR"
is displayed.
CD signal and the CTS signals. In case of an error, "ERROR"
is displayed.
iii.
The DTR signal is turned on/off to check the operations of the
DSR signal and the RI signal. IN case of an error, "ERROR" is
displayed. If an error occurs in procedure ii or iii, the following
procedures are not performed.
DSR signal and the RI signal. IN case of an error, "ERROR" is
displayed. If an error occurs in procedure ii or iii, the following
procedures are not performed.
iv. The baud rate is set to 19200bps asynchronous mode and
data of 256 bytes at 00H
∼
FFH is sent from the SD signal
line. Data received in the RD signal line is compared with the
sent data to check if the both are identical. If the output data is
not send back within 5 sec, "ERROR" is displayed and the test
is terminated.
sent data to check if the both are identical. If the output data is
not send back within 5 sec, "ERROR" is displayed and the test
is terminated.
v.
An interrupt signal is delivered from UART and the number of
generated interrupt request signal is displayed.
generated interrupt request signal is displayed.
2
Display
Serial I/O COM1 Check
RTS - CD
:
PASS !! (or ERROR !!)
RTS - CTS
:
PASS !! (or ERROR !!)
DTR - DSR
:
PASS !! (or ERROR !!)
DTR - RI
:
PASS !! (or ERROR !!)
TD - RD
:
PASS !! (or ERROR !!)
INTERRUPT
:
IRQ XX
"XX" shows the number of interrupt request signal.
If COM1 UART is not accessible, the display shows the following.
If COM1 UART is not accessible, the display shows the following.
Serial I/O COM1 Check
COM1 Channel Disabled
3
Exiting
Pressing the Esc key will exit from this check mode.
Pressing the Esc key will exit from this check mode.
2) COM2 Check
1
Check contents
Loop back check is performed to UART at I/O address 2F8H
Loop back check is performed to UART at I/O address 2F8H
∼
2FFH. The check procedures and the exiting procedure are similar
to COM1 check.
to COM1 check.
3) COM3 Check
1
Check contents
Loop back check is performed to UART at I/O address 3E8H
Loop back check is performed to UART at I/O address 3E8H
∼
3EFH. The check procedures and the exiting procedure are similar
to COM1 check.
to COM1 check.
4) COM4 Check
1
Check contents
Loop back check is performed to UART at I/O address 2E8H
Loop back check is performed to UART at I/O address 2E8H
∼
2EFH. The check procedures and the exiting procedure are similar
to COM1 check.
to COM1 check.
5) COM5 Check
1
Check contents
Loop back check is performed to UART at I/O address PSC ad-
dress + (20H
Loop back check is performed to UART at I/O address PSC ad-
dress + (20H
∼
27H). The check procedures and the exiting proce-
dure are similar to COM1 check.
6) COM6 Check
1
Check contents
Loop back check is performed to UART at I/O address PSC ad-
dress + (28H
Loop back check is performed to UART at I/O address PSC ad-
dress + (28H
∼
2FH). The check procedures and the exiting pro-
cedure are similar to COM1 check.
3-10. Liquid Crystal Display Diagnostics
This diagnostics is used to check the LCD display of the ER-
A850/A880.
To identify the ER-A850 and the ER-A880, I/O address 3F0H is read
to check the most significant bit. If the most significant bit is "1," it is
judged as the ER-A880. If the most significant bit is "0," it is judged as
the ER-A850.
The test program displays the following patterns in sequence. Press
the space bar to go to the next display. Pressing the space bar at the
final pattern or pressing the Esc key during test will exit from this
check mode to return to the service-man diagnostics menu.
A850/A880.
To identify the ER-A850 and the ER-A880, I/O address 3F0H is read
to check the most significant bit. If the most significant bit is "1," it is
judged as the ER-A880. If the most significant bit is "0," it is judged as
the ER-A850.
The test program displays the following patterns in sequence. Press
the space bar to go to the next display. Pressing the space bar at the
final pattern or pressing the Esc key during test will exit from this
check mode to return to the service-man diagnostics menu.
1) Liquid Crystal Display Check
1
Check contents
Test patterns are displayed in the following test procedures. Press
the space bar to go to the next test pattern.
Test patterns are displayed in the following test procedures. Press
the space bar to go to the next test pattern.
i.
Black-and-white checkered pattern in one-dot interval
ii.
Reversed display of pattern i.
– 18 –
iii.
Vertical stripe pattern in one-dot interval
iv. Reversed display of pattern iii
v.
Horizontal stripe pattern in one-dot interval
vi. Reversed display of pattern v.
vii. "H" pattern. Characters "H" are displayed in 80 columns
×
25
lines. The last 35th line, however, shows 79 columns of "H."
(In actual, the screen shows only 25 lines. Check the rest of
10 lines by scrolling.)
(In actual, the screen shows only 25 lines. Check the rest of
10 lines by scrolling.)
viii. Black-and-white pattern in 16 gradations
3
Exiting
Pressing the space bar at the final pattern or pressing the Esc key
will exit from this check mode.
Pressing the space bar at the final pattern or pressing the Esc key
will exit from this check mode.
3-11. Rear Display Diagnostics
This diagnostics is used to check the option display, the ER-A8DP.
The test program displays the following patterns. Press the Esc key to
return to the service-man diagnostics menu.
The test program displays the following patterns. Press the Esc key to
return to the service-man diagnostics menu.
1) Rear Display Check
1
Check contents
Test patterns are displayed in the following procedure. Press the
space bar to go to the next pattern.
Test patterns are displayed in the following procedure. Press the
space bar to go to the next pattern.
i.
The following test pattern is displayed.
ii.
The test pattern with all segments lighted is displayed.
2
Display
Rear Display Check
3
Exiting
Pressing the Esc key will clear the rear display and exit from this
check mode.
Pressing the Esc key will clear the rear display and exit from this
check mode.
3-12. SHARP Retail Network Diagnostics
This diagnostics is used to test the SRN.
For this test, the following composition is required.
For this test, the following composition is required.
•
ER-45X
•
Terminal resistor
•
Branch (main line) cable (only in data transmission test)
The display shows the following menu. The highlighted cursor is
moved with the cursor up key (
moved with the cursor up key (
↑
) and the cursor down key (
↓
) of the
AT key. Move the cursor to the diagnostics item to be executed, then
press the Enter key, and the selected individual diagnostics program
will be executed. After completion of an individual diagnostics pro-
gram, the display returns to the menu screen. To exit from the diag-
nostics mode, press the Esc key, and the display will return to the
service-man diagnostics menu screen.
press the Enter key, and the selected individual diagnostics program
will be executed. After completion of an individual diagnostics pro-
gram, the display returns to the menu screen. To exit from the diag-
nostics mode, press the Esc key, and the display will return to the
service-man diagnostics menu screen.
SRN (SHARP Retail Network) Diagnostics
Self Check
Flag Send Check
Data Send Check
Data Transmission Check (Satellite Machine)
Data Transmission Check (Master Machine)
– 19 –
1) SRN Self Check
1
Check contents
The ROM and RAM for SRN, an interruption by CTC, and carrier
sense are checked. In addition, the ADLC functions and send/re-
ceive DMA are checked by utilizing the self loop feature of the
ADLC (MC6854). Also, other signals are checked. The test proce-
dures are as follows:
The ROM and RAM for SRN, an interruption by CTC, and carrier
sense are checked. In addition, the ADLC functions and send/re-
ceive DMA are checked by utilizing the self loop feature of the
ADLC (MC6854). Also, other signals are checked. The test proce-
dures are as follows:
i.
Diagnostics 2 command is executed to display the number of
resend.
resend.
ii.
Diagnostics 0 command is executed to display the error
status. The table below shows the error status. If an error
occurs during this test, the following procedures are not per-
formed.
status. The table below shows the error status. If an error
occurs during this test, the following procedures are not per-
formed.
b7
An error occurred. (Always "1" in error print.)
b6
An unexpected interruption was made.
b5
A collision occurred.
b4
The interruption of send complete (interruption of DMAC
TC
TC
⋅
UP) is disabled.)
b3
A carrier OFF interruption is disabled, or the carrier OFF
mirror image shows carrier ON.
mirror image shows carrier ON.
b2
An interruption of CTC CH2 or CH3 (TIMER interruption) is
disabled.
disabled.
b1
ROM sum check error
b0
RAM error
iii.
Diagnostics 1 command is executed to display the error
status. The table below shows the error status.
status. The table below shows the error status.
b7
An error occurred. (Always "1" in error print.)
b6
An unexpected interruption was made.
b5
The data sent from DMA differs from the received data.
b4
The number of data received by DMA is abnormal.
b3
The number of data sent by DMA is abnormal.
b2
An overrun error occurred.
b1
An underrun error occurred.
b0
A send complete interruption (DMAC TC
⋅
UP interruption) is
disabled.
iv. Diagnostics 5 command is executed to display the error
status. The table below shows the names and directions of
the signals which are checked with diagnostics 5 command.
the signals which are checked with diagnostics 5 command.
Signal name
Direction
Power interruption notice
Host
→
Controller
Power interruption ON initializing
Host
→
Controller
Power interruption ON continuation
Host
→
Controller
Power interruption process complete
Host
←
Controller
CH1 received data present
Host
←
Controller
CH2 received data present
Host
←
Controller
The object bits of two statuses (ST1 and ST2) obtained by
diagnostics 5 command are checked if they are "0" in ST1 and
"1" in ST2. (The bits other than the object bits should be
masked.)
If not, the error generation bit is set as "1," and the error
status is displayed. The normal bits show "0."
diagnostics 5 command are checked if they are "0" in ST1 and
"1" in ST2. (The bits other than the object bits should be
masked.)
If not, the error generation bit is set as "1," and the error
status is displayed. The normal bits show "0."
The table below shows the error status from the host com-
puter to the controller.
puter to the controller.
b7
Reserved (Always "0" is displayed.)
b6
Power interruption notice
b5
Reserved (Always "0" is displayed.)
b4
Reserved (Always "0" is displayed.)
b3
Reserved (Always "0" is displayed.)
b2
Reserved (Always "0" is displayed.)
b1
Power ON continuation
b0
Power ON initializing
The table below shows the error status of signals from the
controller to the host.
controller to the host.
b7
Reserved (Always "0" is displayed.)
b6
Reserved (Always "0" is displayed.)
b5
Reserved (Always "0" is displayed.)
b4
CH2 received data present
b3
CH1 received data present
b2
Power interruption process complete
b1
Reserved (Always "0" is displayed.)
b0
Reserved (Always "0" is displayed.)
2
Display
SRN Self Check
DATA RETRY CNT. =
XX
XXX
The number of resend is
displayed in XXX in decimal
number.
displayed in XXX in decimal
number.
ACK RETRY CNT. =
XX
XXX
DIAG 0
:
XXXXXXXX
— b7, b6, ... b0, in sequence
from the left. "1" is
displayed in case of an
error, "0" is displayed in
normal operation.
displayed in case of an
error, "0" is displayed in
normal operation.
DIAG 1
:
XXXXXXXX
— b7, b6, ... b0, in sequence
from the left. "1" is
displayed in case of an
error, "0" is displayed in
normal operation.
displayed in case of an
error, "0" is displayed in
normal operation.
DIAG 5 H
→
C
:
XXXXXXXX
— b7, b6, ... b0, in sequence
from the left. "1" is
displayed in case of an
error, "0" is displayed in
normal operation.
displayed in case of an
error, "0" is displayed in
normal operation.
DIAG 5 H
←
C
:
XXXXXXXX
— b7, b6, ... b0, in sequence
from the left. "1" is
displayed in case of an
error, "0" is displayed in
normal operation.
displayed in case of an
error, "0" is displayed in
normal operation.
3
Exiting
Pressing the Esc key will exit from this check mode. When exiting,
perform resetting of the SRN software in the PSC.
Pressing the Esc key will exit from this check mode. When exiting,
perform resetting of the SRN software in the PSC.
2) SRN Flag Send Check
1
Check contents
Diagnostics 3 command is executed to send flag (7EH).
Diagnostics 3 command is executed to send flag (7EH).
2
Display
SRN Flag Send Check
3
Exiting
Pressing the Esc key will exit from this check mode. When exiting,
perform resetting of the SRN software in the PSC.
Pressing the Esc key will exit from this check mode. When exiting,
perform resetting of the SRN software in the PSC.
3) SRN Data Send Check
1
Check contents
Diagnostics 4 command is executed to continuously send data
00H
Diagnostics 4 command is executed to continuously send data
00H
∼
FFH with 256 Byte as one packet in 12.8 msec packet
interval at 480kbps.
2
Display
SRN Data Send Check
– 20 –
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