Sharp XE-A307 (serv.man3) Service Manual ▷ View online
XE-A207/A217/A307
DIAGNOSTIC PROGRAM DESCRIPTION
– 35 –
10. RS232C
The RS232C loopback test is performed.
1) Connect the DSUB9pin loopback connector.
2) Select the test item with the [
2 ] / [ 4 ] key.
3) Select “NORMAL.”
4) Conduct the test by pressing the [TL/NS] key.
5) Select “EXIT” to end the test.
• Below is shown the connection diagram of the loopback connector to
be used for RS232C check.
10-1. NORMAL
(1) Test Items
<Check of Control Signals>
It performs the Read and Check of the above input.
<Check of Data Transfer>
The transfer of 256 bytes loop back data of 00H to 0FFH is conducted.
A found error is displayed.
Press the [TL/NS] key to end the test.
Caution: To have printout of test results, as XE-A307 has 2 sheets for
the printer, be sure to use both printers to print it out.
RS232C
CH1
EXIT
LCD display
LCD display
RS232C CH1
NORMAL
5V SUPPLY
EXIT
EXIT
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
DCD
RxD
TxD
DTR
GND
DSR
RTS
CTS
RI
RxD
TxD
DTR
GND
DSR
RTS
CTS
RI
FG
FG
Output
Input
DTRn
RTSn
DSRn
RIn
DCDn
CTSn
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
ON
ON
OFF
ON
ON
OFF
OFF
ON
ON
ON
ON
ON
ON
No.
Display
1
DTR-DSR
2
DTR-RI
3
RTS-DCD
4
RTS-CTS
5
RI INT
6
DCD INT
7
CTS INT
8
TXEMP
9
TXEMP INT
10
TXRDY
11
TXRDY INT
12
RCVRDY
13
RCVRDY INT
14
SD-RD(DATA)
15
SD-RD(FRAME)
OK
LCD display (when the test result is NG.)
RS232 CH1
NG
DTR-DSR,DTR-RI,
RTS-DCD,RTS-CTS
NG
DTR-DSR,DTR-RI,
RTS-DCD,RTS-CTS
LCD display (when the test result is OK.)
RS232 CH1
Printout (when the test result is NG.)
RS232C CH1 NG---ERROR NO.
Printout (when the test result is OK.)
RS232C CH1 OK
XE-A207/A217/A307
DIAGNOSTIC PROGRAM DESCRIPTION
– 36 –
10-2. 5V SUPPLY
(1) Test Items
<Check of Control Signals>
It performs the Read and Check of the above input.
<Check of Data Transfer>
The transfer of 256 bytes loop back data of 00H to 0FFH is conducted.
A found error is displayed.
Press the [TL/NS] key to end the test.
When LED turns on, the test operator should press either key according
to the test result of ON or OFF.
to the test result of ON or OFF.
By pressing the [TL/NS] key, this test ends with OK.
Caution:
• To have printout of test results, as XE-A307 has 2 sheets for the
printer, be sure to use both printers to print it out.
• When conducting the PWB inspection for XE-A307V, swith SP3 of the
PWB to 5V power supply.
11. PRINTER
The unit displays and prints out as shown below.
By pressing the [TL/NS] key, this test ends with OK.
By pressing any key other than the [TL/NS] key, the test ends with NG.
By pressing any key other than the [TL/NS] key, the test ends with NG.
Caution: To have printout of test results, as XE-A307 has 2 sheets for
the printer, be sure to use both printers to print it out.
12. ROM
Check whether the checksum of 000000h to 1FFFFFh is correct.
By pressing the [TL/NS] key, this ends.
Caution: To have printout of test results, as XE-A307 has 2 sheets for
the printer, be sure to use both printers to print it out.
Output
Input
DTRn
RTSn
DSRn
DCDn
CTSn
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
ON
OFF
ON
OFF
OFF
ON
ON
ON
ON
ON
No.
Display
1
DTR-DSR
2
RTS-DCD
3
RTS-CTS
4
DCD INT
5
CTS INT
6
TXEMP
7
TXEMP INT
8
TXRDY
9
TXRDY INT
10
RCVRDY
11
RCVRDY INT
12
SD-RD(DATA)
13
SD-RD(FRAME)
LCD display (when the test result is NG.)
RS232 CH1
SIGNAL CHECK:NG
DTR-DSR,RTS-DCD
RTS-CTS
SIGNAL CHECK:NG
DTR-DSR,RTS-DCD
RTS-CTS
LCD display (when the test result is OK.)
RS232 CH1
SIGNAL CHECK:OK
LED ON?
TL:ON, OTHER:OFF
SIGNAL CHECK:OK
LED ON?
TL:ON, OTHER:OFF
Printout (when SIGNAL CHECK is NG.)
RS232C
ޓCH1 NG---ERROR NO.
Printout (when SIGNAL CHECK is OK, LED is OFF.)
RS232C
ޓCH1 NG
Printout (when SIGNAL CHECK is OK, LED is ON.)
RS232C
ޓCH1 OK
LCD screen
PRINTER
TL:OK,OTHER:NG
Printout
/////////// ------- //////////
/////////// ------- //////////
/////////// ------- //////////
/////////// ------- //////////
Print 30 columns and 6 lines of "/."
LCD display (when the test result is NG.)
ROM
Version xxxx
Checksum xxxx NG
TL KEY:EXIT
Printout (when the test result is NG.)
ROM Version & CHECKSUM
Version xxxx
Checksum xxxx NG
Version xxxx
Checksum xxxx NG
ROM
LCD display (when the test result is NG.)
Version xxxx
Checksum xxxx OK
TL KEY:EXIT
Checksum xxxx OK
TL KEY:EXIT
Printout (when the test result is OK.)
ROM Version & CHECKSUM
Version xxxx
Checksum xxxx OK
Version xxxx
Checksum xxxx OK
XE-A207/A217/A307
DIAGNOSTIC PROGRAM DESCRIPTION
– 37 –
13. RAM
The Write & Verify of the whole RAM area is conducted.
Change the written data for each address as shown below.
Change the written data for each address as shown below.
After the test result is displayed (printed out), press the [TL/NS] key to
terminate.
terminate.
Caution: To have printout of test results, as XE-A307 has 2 sheets for
the printer, be sure to use both printers to print it out.
Address
Written data
800000h
ȡ80FFFFh
800000h
ȡ80FFFFh
810000h
ȡ81FFFFh
810000h
ȡ81FFFFh
|(The rest is omitted)
870000h
ȡ87FFFFh
55h write,verify
AAh write,verify
55h write,verify
AAh write,verify
|(The rest is omitted)
55h write,verify
AAh write,verify
870000h
ȡ87FFFFh
LCD display (when the test result is NG.)
RAM WRITE&VERIFY
NG
TL KEY:EXIT
NG
TL KEY:EXIT
LCD display (when the test result is OK.)
RAM WRITE&VERIFY
OK
TL KEY:EXIT
OK
TL KEY:EXIT
Printout (when the test result is NG.)
RAM NG
Printout (when the test result is OK.)
RAM OK
XE-A207/A217/A307
PWB LAYOUT
– 38 –
CHAPTER 7. PWB LAYOUT
(1) MAIN PWB
<TOP SIDE>
<BOTTOM SIDE>
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