Samsung VP-D101 Service Manual page 20

Alignment and Adjustments
2-4-5 Tape Path Adjustment
2-4-5(a) Preparation for Adjustment
ΠClean the tape running surface (Poles, Drum, Capstan Shaft, Pinch Roller).
´ Observe the PB RF signal and Head Switching Pulse on an oscilloscope.
ˇ Play back the alignment tape.
¨ Check that the waveform of the RF signal is flat at both inlet and outlet(A in Fig. 2-23).
If not flat (B or C in Fig. 2-23), do adjustments 2-4-5(b) through 2-4-5(d).
Fig. 2-22 Rear PCB (Bottom Side)
2-16
9 10
8 11
7 12
RF Signal
13
6
(Pin 3 of CNR02)
5 14
15
4
3 16
Head Switching
2 17
(Pin 2 of CNR02)
1 18
P1 P2
P3
INLET
P5 P6
P7
Fig. 2-24
OUTLET
A NORMAL
DEFECT AT INLET
B
C
DEFECT AT OUTLET
Fig. 2-23
P8
Samsung Electronics