Electrical Adjustment; Vco Free-Running Adjustment - Pioneer CDJ-1000 Service Manual

CDJ-1000
QQ
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6.4 ELECTRICAL ADJUSTMENT

1

VCO Free-running Adjustment

• Power ON
• None disc
• The position of TEMPO
slider is set to 0
• DOUT OFF
START
MAIN ASSY
VCO IN
GND
TE
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MAIN ASSY
VR601
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8
Objective : To optimize the VCO free-running frequency
When not properly adjusted :
• Master Tempo does not function normally.
• TEMPO display does not become the same as that
of actual voice tempo.
DC voltage
2.5±0.2V
Probe (10:1)
Q Q
3 6 7 1 3 1 5
co
.
9 4 2 8
CH1 CH2
(X) (Y)
Oscilloscope
V: 50mV/div.
H: 10msec/div.
DC mode
0 5 8 2 9 9 4 2 8
m
9 9
9 9