Tape Path Adjustment - Samsung VP-D20 Service Manual

Alignment and Adjustments

4-5 Tape Path Adjustment

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 flatat both inlet and outlet(A in Fig. 4-7).
If not flat (B or C in Fig. 4-7), do adjustments 4-5(b) through 4-5(d).
S REEL
4-6
INLET OUTLET
Fig. 4-7
P3
P1
P2
Fig. 4-8
A NORMAL
B DEFECT AT INLET
C
DEFACT AT OUTLET
P5
P7
P6
T REEL
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