Sharp ER-A460, Service Manual

Page: 33 / 75

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-A460/A470.
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, VRAM, VCKDC, POFF, +24V).
b) CPU input/output pins, CPU internal logic, CKDC6, MPCA6,
address decoder, address bus, data bus, and common
ROM/RAM must be working properly.
2. Operational procedure
To start the diagnostic program, you must enter the following com-
mand.
3-digit test item number
→
TL key in the 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. After any option 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.
Master reset: Turn power on in the SRV’ mode and change it
to the SRV mode with the JF key pressed.
Journal print: MASTER RESET ***
Program reset: Turn power on in the SRV’ mode and change it
to the SRV mode.
Journal print: PRG. RESET ***
3. Test command list
With the SRV mode and the following command entry, the test starts.
Code Description
100 Display test-1
101 Key and clerk switch position code display
102 R/J printer test
104 Keyboard test
105 Mode switch test
106 Validation sensor and near end sensor test
*1
108 Calendar oscillator test
109 SSP test
110 Drawer-1 open and sensor test
111 Drawer-2 open and sensor test
116 Display test-2
117 I/R interface test reception side
118 I/F interface test transmission side
120 Standard RAM test
130 Standard ROM test
150 R/J printer dot pulse width adjustment
200 Option RAM chip test
400 Option ROM chip test
*1
Validation sensor is not used.
[1] Display test-1
1
Key operation
100
→
TL
2
Functional description
The following is displayed:
Front display
Operator display
3 Check the following items:
a) Check for proper activation of display elements.
b) Check for blur, uneven illumination, and partial omission.
4
Test termination
Press any key. The test terminates with the test and message
printed.
100
Test termination print
[2] Key, clerk, and switch position code display
1
Key operation
101
→
TL
2
Functional description
Key, clerk, and receipt switch codes are displayed.
3
Check the following items:
Change key and switch positions for proper display activation.
Clerk code: 1 hole clerk key
000 (off state)
001 (Clerk 1)
002 (Clerk 2)
*
255 (Clerk 255)
Key code: --- (simultaneous two key)
depression, invalid entry)
KEY POSITION CODE
ER-A460 (Normal key) 14 x 6
↑
R
↑
J 016 022 028 034 040 046 052 058 064 070 076 082
005 010 015 021 027 033 039 045 051 057 063 069 075 081
004 009 014 020 026 032 038 044 050 056 062 068 074 080
003 008 013 019 025 031 037 043 049 055 061 067 073 079
002 007 012 018 024 030 036 042 048 054 060 066 072 078
001 006 011 017 023 029 035 041 047 053 059 065 071 077
ER-A470 (Flat key) 15 x 8
↑
R
↑
J 022 030 038 046 054 062 070 078 086 094 102 110 118
007 014 021 029 037 045 053 061 069 077 085 093 101 109 117
006 013 020 028 036 044 052 060 068 076 084 092 100 108 116
005 012 019 027 035 043 051 059 067 075 083 091 099 107 115
004 011 018 026 034 042 050 058 066 074 082 090 098 106 114
003 010 017 025 033 041 049 057 065 073 081 089 097 105 113
002 009 016 024 032 040 048 056 064 072 080 088 096 104 112
001 008 015 023 031 039 047 055 063 071 079 087 095 103 111
DOT DISPLAY:
1 2 3 4 5 6 7 8 9 0
7-SEGMENT DISPLAY:
4 5 6 7 8 9 0
C L K / K E Y S R V
Key position
code
DOT DISPLAY:
7-SEGMENT DISPLAY:
Person-in-charge
code
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