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8. CHECK AND ADJUSTMENT PROCEDURE
Caution:
a. This
product
has
been
adjusted
completely
at
the
f ac i: o f y be for e s h i p me n t.
Therefore, do not adjust any points other than those
seemed necessary,
b, Wait at feast
10 minutes after
turning on the power
before rnaking any adjustments,.
1) Clock check and adjustment — 1
,H Setting:
(any program number OK) Set TUNE VR on
rear panel to center.
ai r sw
:
t o
;
D. TIM £
0
LEVEL VR !
0
INTENSITY
0
DIRECT VR
0
FRECX.
:
0
EFFECT 1
0
TIME k. 4
0 F F
F.BACK
0
MODE
DELAY
n) Connect frequency counter to TP1 test point of KLM-
833 and observe frequency.
c) Check if value of the counter is 4 Oik Hz
!
lOOHz.
cl'i Adjust VR8 to obtain above value if the observed value
iS out of above range.
2) Clock check and adjustment — 2
a? Setting:
(any program number OK) Set TUNE VR on
rear panel to center,
<TT S'/y
1 0
J.TIME
o
""
LEVEL VR
7
INTENSITY
:
o
DIRECT VR
'""
o
FREO.
o "
'
EFFECT
o
TIME :k 4
OF?
F.BACK
~
o
" "
MODE
*
Off
the MIDI SW. and record any sound with SEQ
MODE.
b) Connect frequency counter to TP1
and observe fre
quency.
el ON
the MIDI SW.,
and play MIDI
Keyboard such as
POLY-800,
Cl Key
C2 Key
C3 Key
B3 Key
value on counter
10rOO0Hz
20,,OOOHz
40,OO0Hz
7 5,644 Hz
Bend Up (Bend Range Max)
BO/QQOHz
Note:.
MIDI: Receive CH must be ICiH.,
MIDI ed i t i n f or m a t io n m u s t be X 4 m od e.,
Support note range must be Cl,
31 LFO check and adjustment
a) S a t1 \ n cj: i a n y P r o g r a m n u m b e r O K)
Al f SW
10
D.TIME
0
t EVEL VR
0
i IN TENS 11 V
1
" ' o
DIRECT VR
0
FREQ.
0
EFFECT
0
\ TIME x 4
OFF
F BACK
0
MODE
DELAY
b) Connect oscilloscope (0.5V/div, 0.5V/div, DC) to TP3
on Kt IV!-833 and observe waveform described below,
GND
A
"
/
\
./
\
,/\
/
\
A
/
\
■
/
Fig, 1
c} C o fi f s rm s f t o p of t h e w a ve f o r rn i s 0 V.
cl) Adjust
VR6
to
obtain
above
waveform
if observed
w a v e f o r m i s d i f f e r e n t fro m t h e a bo ve d e sc r i p t i o n,
4) Maximum output level cheek and adjustment
a) Set11 n g: (a n y p r ogram n u rn be r O K 31
ai rsw
10
D.TiME
0
1 EVEL VR
'?
INTENSITY
0
DIRECT VR
«
FREO.
0
EFFECT
TIME x 4
OFF
F.BACK 1
0
i
MODE
;
DEI AY
any value OK
b( Connect standard signal generator (1KHz sine wave) to
this unit's Input Jack,,
c} Co n n ec t osc i 11 ©scope (2 V /'cl j v, 50/usec/di v, A C} to T P 2
on KLlvi-833 and observe waveform described as below.
To get
the
click
waveform
as
below,
adjust
output
v o 1 u me o f sta nd a rd s i cj n a I g e n e r a to r.
i'S
!\
I s x
"\
I \
r
\
\
f "•,.
fi
-\ / -
\
J U I / l
GOOD
Fig, 2
d) Check if the observed waveform is GOOD, If not,, adjust
VR1 on KLM-833.
BAD
BAD
clj Confirm if the value on the counter is within 80KHz
e) Adjust VR7 to obtain above value if the observed value
ts out of above range.
■•- 23 •
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