Samsung VP-D455, Руководство по обслуживанию

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3-16
Alignment and Adjustments
Samsung Electronics
3-4-5 Tape Path Adjustment
3-4-5(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. 3-21).
If not flat (B or C in Fig. 3-21), do adjustments 3-4-5(b) through 3-4-5(d).
RF Signal
(Pin 3 of CNR02)
Head Switching
(Pin 2 of CNR02)
1
2
3
4
5
6
7
8
9 10
11
12
13
14
15
16
17
18
CNR02
Fig. 3-20 Rear PCB (Bottom Side)
P1 P2
P5
P6
P7
P8
P3
Fig. 3-22
A
B
C
INLET OUTLET
NORMAL
DEFECT AT INLET
DEFECT AT OUTLET
Fig. 3-21