Electrical Adjustment - Pioneer CMX-5000 Service Manual

6.4 ELECTRICAL ADJUSTMENT

1
VCO Free-running Adjustment
Note: Adjustment of VC401 may not be made if the
SLOT-IN MECHANISM ASSY is installed.
Before adjustment, remove the SLOT-IN
MECHANISM ASSY..
• Power ON
• None disc
START
CDPB ASSY
IC401 - pin 1
GND
2
RF Level Adjustment
• Test mode
Enter the RF ADJ mode by
pressing "C-MODE" button on the
remote control unit for servicing.
• Move the pickup to the RF ADJ
position(disc outer circumference)
by pressing the "PLAY" button on
the remote control unit for servicing.
TEST DISC
PLAY
START
CDPB ASSY
RF
GNDA
SIDE B
CDPB ASSY
VC401
Player
PICKUP
ASSY
LD POWER
VR
JA1009 (PLA)
TRMB ASSY
JA1010 (PLB)
Player
or
Objective : To optimize the VCO free-running frequency
When not properly adjusted :
• Master Tempo does not function normally
• The output does not appear in indication and occasion
when turned a Tempo adjustment into + side.
DC voltage
2.5±0.2V
Probe (10:1)
Objective : To adjust the amplitude of playback RF signal
When not properly adjusted :
Player does not playback, track search is impossible.
Remote control
unit for servicing
(RU-V101)
Probe (10:1)
CMX-5000, CU-V160
CH1 CH2
(X) (Y)
Oscilloscope
V: 50mV/div.
H: 10msec/div.
DC mode
0.5Vp-p
CH1 CH2
(X) (Y)
Oscilloscope
V: 50mV/div.
H: 10msec/div.
AC mode
65