Akai S1100 - Hardware Test Mode; Entering and Exiting Test Mode; CPU Memory Test Procedure

3-3.
HARDWARE TEST
THE HARDWARE TEST
MODE
* This test mode is
used for inspecting
the unit.
[HOW TO
SET THE HARDWARE
TEST MODE]
1)
Turn on the power, press
the “MARK/#” and
“NAME” buttons at the same time
(all red indicators
will
light),
then press
the
“+/
<
”
button.
2)
The following menu
(refire to Fig.
3-4) will appear on the LC-display when
the model
S1
100 is set to the HARDWARE
TEST mode.
I
HARDWARE T E ST
ADJUST CLOCK RATE BEFORE SETTING
THE DAC/ADC TRIMS
[1
cpu][2wav][3dac][4of f][5adl][6adr][7adm][boot]
Fig.
3-4
[THE PROGRAM
NUMBERS AND PROGRAM
NAMES] [HOW TO
RELEASE FROM THE HARDWARE
TEST MODE]
PROG. No
S1 1 00 HARDWARE TEST
CONTENTS
CPU MEMORY
TEST
WAVEFORM MEMORY
TEST
NOT USED
NOT
USED
~
LEFT ADC
OFF-SET NULL
~
RIGHT ADC
OFF-SET NULL
NOT USED
* During the HARDWARE
TEST mode, press
the “F8/H”
button.
* Although displayed,the
contents are disregarded.
Fig.3-5
3-3-1
.
CPU MEMORY
TEST
1)
During the HARDWARE TEST
mode, press the “FI /A” button. The following
display will appear on the LC-display(refer
to Fig.
3-6).
HARDWARE TEST] 1.
CPU MEMORY TEST
BANK
DAT A >1514131211109
8 7 6 543 2 1 0 RESULT
1
2
[1
cpu][2wav][3dac][4of f][5adl][6adr][7adm][boot]
Fig.
3-6
2)
A few second later, the
LC-display will show the message
“OK” as in Fig.
3-7.
If
the message “OK” does not
appear on
the LC-display, it means
a malfunction in the memory circuit. In
this case check the
memory circuit and LSI.
HARDWARE
TEST 1. CPU
MEMORY TEST
BANK
DATA>1 51 41 31 21 11098765432
1 0 RESULT
1
OK
2
OK
[1
cpu][2wav][3dac][4of
f][5adl][6adr][7adm][boot]
Fig.
3-7
SERVICE MANUAL