18
Fig. 5-1
8
Referring to Fig. 5-1, select the MLT/MIX TEST Item by
either UP or DOWN Cursor.
8
Execute the MLT/MIX TEST Item by pressing the Enter
Key.
8
When executing, the Self Check will start for the three MIX
ICs (IC523 - IC525) and one Multi IC (IC526).
8
A result after Self Check, displayed "OK" in passed item
and displayed "NG" in defective item.
5.6. Multi IC/Mix IC/DSP Overall Test
(MLT/MIX/DSP TEST)
8
Referring to Fig. 5-1, select the MLT/MIX/DSP TEST Item
by either UP or DOWN Cursor.
8
Execute the MLT/MIX/DSP TEST Item by pressing the
Enter Key.
8
When executing, the Self Check will start for chains of
signal path consist of three MIX ICs (IC523 - IC525) and
nineteen DSP ICs (IC501 - IC519).
8
Each DSP IC has been controlled through the Multi IC
(IC526) so that the Self Check for the Multi IC is made in
this section.
8
A result after Self Check, displayed "OK" in passed item
and displayed "NG" in defective item.
8
In the case displayed "NG" in defective signal path,
passed IC number(s) is (are) displayed reverse indication
in a half way.
So that easy to find which signal path is defected as
shown in Fig. 5-2.
Fig. 5-2
<For examples>
In case of Fig. 5-2, defective IC501 or defective
connection between IC501 and IC518.
5.7. DSP Meter Signal Test (METER SIGNAL
TEST)
8
Move the Cursor to most bottom position by either UP or
DOWN Cursor Key.
8
Select the Diagnostic Item (DIAG3) by either LEFT or
RIGHT Cursor Key.
8
Press the Enter Key, the Diagnostic Menu 3 as shown in
Fig. 5-3 is displayed.
Fig. 5-3
8
Select the METER SIGNAL TEST Item by either UP or
DOWN Cursor.
8
Execute the METER SIGNAL TEST Item by pressing the
Enter Key.
8
When executing, the Self Check will start for the Meter
Signal Paths from the nineteen DSP ICs (IC501 - IC519)
to Multi IC (IC526).
8
A result after Self Check, displayed "OK" in passed item
and displayed "NG" in defective item.
5.8. DSP D-RAM Test (D-RAM TEST)
8
Referring to Fig. 5-3, select the D-RAM TEST Item by
either UP or DOWN Cursor.
8
Execute the D-RAM TEST Item by pressing the Enter Key.
8
When executing, the Self Check will start for the D-RAMs
(IC528 - IC532) Signal Paths from four DSP ICs (IC505 -
IC508) to Multi IC (IC526).
8
A result after Self Check, displayed "OK" in passed item
and displayed "NG" in defective item.
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