Sharp ER-A450T Service Manual - Page 31

Test Function - er a450

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CHAPTER 5. TEST FUNCTION 1. General 1) This diagnostic program has been developed for diagnosing machine functions in the field. The program is contained within the ER-A450S. 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, VDD, POFF, +12.5V, +24V). b) CPU input/output pins, CPU internal logic, CKDC8, MPCA7, system bus and common ROM/RAM must be working properly. 2. Operational procedure To start the diagnostic program, you must enter the following command. SRV mode : XXX CA/AT Test code 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 or the ER-03RA is installed. After any other options 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. For Farther details on the MRS procedures, please refer to page 3-1. 3. Test command list With the SRV mode and the following test code entry, the test start. CODE 100 101 102 104 105 106 108 109 110 111 120 130 150 200 501 550 DESCRIPTION Display & Buzzer test Key code & Cashier key test R/J printer test Keyboard test Mode switch test Printer sensor test Calendar osilator test SSP test Drawer open sensor test (For standard drawer) Drawer open sensor test (For remote drawer) Standard RAM test Standard ROM test Printer dot pulse width adjustment Option RAM test RS-232 channel 1 Loop back check RS-232 channel 8 Loop back check 4. Test contents [1] Display & Buzzer test 1) Key operation 100 CA/AT 2) Functional description Displays the following message on the front and the rear display boards. 1. 2. 3. 4. 5. 6. 7. 8. 9. 0. A decimal point shifts from the lower number of digit by one digit (per 200m sec.). Next, the display the following segments (for approx. 1 sec.). 8. 8. 8. 8. 8. 8. 8. 8. 8. 8. The above two kinds of displays repeat continuously. The buzzer sounds continuously during test. 3) Check items a) The display must be correctly shown at each position. b) The luminosity of displays must be uniform and even at each position. c) Abnormal buzzer sound indicate a problem. 4) Test termination Press any key. The test terminates and the test No. and message is printed 1 0 0 [2] Key code & Cashier key test 1) Key operation 101 CA/AT 2) Functional description Key code, MRS switch state and Cashier code are displayed. Key code (Not used) Cashier code 5 - 1

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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-A450S.
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, VDD, POFF, +12.5V, +24V).
b) CPU input/output pins, CPU internal logic, CKDC8, MPCA7,
system bus and common ROM/RAM must be working prop-
erly.
2. Operational procedure
To start the diagnostic program, you must enter the following com-
mand.
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 or the ER-03RA is installed. After any other options 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.
For Farther details on the MRS procedures, please refer to page 3-1.
3. Test command list
With the SRV mode and the following test code entry, the test start.
CODE
DESCRIPTION
100
Display & Buzzer test
101
Key code & Cashier key test
102
R/J printer test
104
Keyboard test
105
Mode switch test
106
Printer sensor test
108
Calendar osilator test
109
SSP test
110
Drawer open sensor test (For standard drawer)
111
Drawer open sensor test (For remote drawer)
120
Standard RAM test
130
Standard ROM test
150
Printer dot pulse width adjustment
200
Option RAM test
501
RS-232 channel 1 Loop back check
550
RS-232 channel 8 Loop back check
4. Test contents
[1] Display & Buzzer test
1) Key operation
2) Functional description
Displays the following message on the front and the rear display
boards.
A decimal point shifts from the lower number of digit by one digit (per
200m sec.).
Next, the display the following segments (for approx. 1 sec.).
The above two kinds of displays repeat continuously.
The buzzer sounds continuously during test.
3) Check items
a)
The display must be correctly shown at each position.
b) The luminosity of displays must be uniform and even at each
position.
c)
Abnormal buzzer sound indicate a problem.
4) Test termination
Press any key. The test terminates and the test No. and message is
printed
[2] Key code & Cashier key test
1) Key operation
2) Functional description
Key code, MRS switch state and Cashier code are displayed.
XXX
CA/AT
Test code
100
CA/AT
1.
2.
3.
4.
5.
6.
7.
8.
9.
0.
8.
8.
8.
8.
8.
8.
8.
8.
8.
8.
1 0 0
101
CA/AT
(Not used)
Cashier code
Key code
5 – 1