Tracking Balance Adjustment - Pioneer CJ-V55 Service Manual

U-V55
Step
No.
Oscilloscope Setting
Test Points
Adjusting
Points
Check items/
Adjustment
Adjustment procedure
v
specifications
6
TRACKING BALANCE ADJUSTMENT
0.5V/div
5msec
/div
TP1
Pin 2
(TRK. ERR)
VR5
(TRK. BAL)
(TRK. ERR)
• Set the TEST disc.
• Set to Service mode.
• Shift the carriage dose to the center of the disc by
pressing
i-
MULTI-SPEED key +
•
Press l-MULTI-SPEED+1 key
+ H]
and
1-MULTI-SPEED
+1
kev
+
l2l to start turning the disc.
• Observe pin 2 TRK. ERR (Tracking error) of TP1
with an oscilloscope and adjust with VR5 TRK. BAL
(Tracking balance) volume so that the DC component
of the tracking error disappears.
Note
:
Before proceeding with the above adjustments,
be sure to adjust the tracking error offset.
B
i
.i
.L_i.J
M
A*B
4
Photo. 7-4
DC elements mixed in signal
Photo. 7-5 DC elements eliminated
96