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14
Diagnostic Test
The diagnostic test checks the circuit board
and keys for proper operation.
To conduct the diagnostic test;
1. Press [RESET] while pressing and hold-
ing down [MENU]. Release [MENU]
when the display shows "SELF TEST?"
2. Press the [ENT] key to start the test. The
test proceeds in the sequence shown in
the figure below.
SELF TEST
MAIN ROM/RAM
MAIN VER xx
DSP ROM/RAM
INDICATION
DSP VER xx
PRESS[MENU]
PRESS[FREQ/STN]
PRESS[▼]
PRESS[▲]
PRESS[ENT]
SELF TEST END
MEANING/USER ACTION
Diagnostic test starts.
Checking MAIN CPU's
ROM and RAM.
MAIN CPU program
version no.
Checking DSP's
ROM and RAM.
DSP CPU program
version no.
Starting key test;
press [MENU].
Press [FREQ/STN].
Press [▼].
Press [▲].
Press [ENT].
Diagnostic test ends.
"SELF TEST?" appears
shortly thereafter.
Figure 12 Sequence of diagnostic test
3. Press the [RESET] key to quit the diag-
nostic test.
Remarks on the diagnostic test
• When the equipment finds RAM or ROM
error RAM NG (No Good) or ROM NG
appears and the test stops. Press the [RE-
SET] key to reset the CPU. Try the test
again.
• When the equipment detects a faulty key
two beeps are released.