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Delay Output Jack
TP108
~
lliJ
SW103
VR104
TP158
@
~
VR102
@
DL Circuit Board
• DIAGNOSTIC
PROGRAMS <TA
r
7°0
~'7A>
D1500 is provided with self-diagnostic programs which
will check ROM and RAM, 7 segments LED and each
key for operation.
*
Use following check procedures as necessary for each
check.
(1) ROM and RAM check
While pressing both increment and decrement keys of
DATA ENTRY, turn POWER switch "ON", and the unit
is set in the self-diagnostic mode and ROM and RAM
checks are automatically carried out.
•
If"
0000"
is displayed, ROM may be defective.
•
If"
RHHR"
is displayed, RAM may be defective.
•
If"
PHS5"
is displayed, ROM and RAM are normal.
*
If ROM or RAM is found defective the unit will not
receive commands from any key.
(2) 7 segments LED check
Press the decrement key"
T"
of BANK. If normal,
" B.8BB.B."
is displayed and the LED of LFO RATE
flashes.
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