Switch And Led Check - Korg A4 Service Manual

<4. SWITCH
AND LED CHECK
>
(1)
This test item
covers the
switches and LEDs.
(2)
Press each of the switches
in
the order below to
confirm that the corresponding
LED lights
up.
DISPLAY
For A4
GTR
SW
LED
For A4 BASS
SW
LED
Pl-1
[1
COMPRESSOR]
<1 COMPRESSOR>
[1
COMP-DYNA EX]
<1
COMP-DYNA
EX>
PI—
2
[2
DIST/OD]
<2 DIST/OD> [2 6
BAND
EQ]
<2 6 BAND EQ>
PI—
3
[3 3
BAND
EQ]
<3
3
BAND EQ> [3
SYNTH BASS]
<3 SYNTH BASS>
PI—
4
[4
PITCH-DELAY]
<4
PITCH
-
DELAY>
[4
DELAY]
<4 DELAY>
PI—
5
[5
CHORUS/FLANGER]
<5
CH0RUS/FLANGER>[5 CHORUS/FLANGER]
<5 CHORUS/FLANGER:
P
1
—6
[6
REVERB]
<6 REVERB>
[6
REVERB]
<6 REVERB>
Pl-7
[BYPASS-TUNE]
<BYPASS-TUNE>
[BYPASS -TUNE]
<BYPASS-TUNE>
PI—
8
[MODEY]
<[!]>
[MODEY]
<[1]>
PI—
9
[MODEY]
<[2]>
[MODEY]
<[2]>
Pl-10
[MODEY]
<[3]>
[MODEY]
<[3]>
Pl-11
[MODEY]
<[4]>
[MODEY]
<[4]>
PI—
12
[MODEA]
<[ ]>
[MODEA]
<[ ]>
PI—
13
[MODEA]
<[5]>
[MODEA]
<[5]>
PI—
14
[MODEA]
<[6]>
[MODEA]
<[6]>
PI—
15
[MODEA]
<[7]>
[MODEA]
<[7]>
Pl-16
[USER/PRESET]
<USER>
[USER/PRESET]
<USER>
Pl-17
[WRITE]
<-50> [WRITE]
<-50>
PI— 18
[WRITE]
<-50-0>
[WRITE]
<-50-0>
PI—
19
[WRITE]
<0> (Green)
[WRITE]
<0> (Green)
PI
-20 [WRITE]
<0-+50>
[WRITE]
<0-+50>
PI—
21
[WRITE]
<+50> [WRITE]
<+50>
PI
-22
[PROG EDIT]
[PROG]
[PROG EDIT]
[PROG]
PI -23
[BANK UP]
[EDIT]
[BANK UP]
[EDIT]
(3)
When [WRITE]
is
pressed, the test function
checks whether the panel
display
(7-segment LEDs) lights up
in
the
sequence shown below.
SWITCH
MAT RIX FOR A4
GTR
SWLO(POO) SWLl(POl) SWL2(P02) SWL3(P03)
SWD0(P04)
USER
/PRESET
WRITE
PROG/EDIT
BYP/TUN
BANK UP
SWDKP05) CH/FL
PEDAL
REVERB
PEDAL
PEDAL
PIT/DLY
SWD2(P06) DIST/OD
PEDAL
3BAND EQ
PEDAL
PEDAL
COMP
SWD3(P07) MODE UP
MODE DOWN
PEDAL
13