7-31
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
A
G
B
C
D
E
F
1
2
3
TP600
CH-1: TP500/APR-12 board (1.PB.L signal)
CH-2: TP600/APR-12 board (2.PB.L signal)
<APR-12 board, side A>
TP500
E600
E500
7-1-6. AT Head Height Check and Adjustment
Preparation
.
Connection of th oscilloscope
7-1-6. AT Head Height Check and Adjustment
Note
The AT head height adjustment is closely related to the azimuth adjustment, head-
to-tape contact adjustment, and head position adjustment.
Be sure to perform adjustments (or checks) according to “In Case the Adjustment is
Performed” in this section when the AT head height is adjusted.
Tools
.
Alignment tape CR8-1A (For DNW-A100/A50/A45):
8-960-097-45
.
Alignment tape CR8-1A PS (For DNW-A100P/A50P/A45P): 8-960-098-45
.
Oscilloscope (Tektronix 2465B or equivalent)
Preparation
1. Turn the Power Off
2. Connect the Oscilloscope
CH-1 : TP500/APR-12 board (1.PB.L signal)
Ground at E500
CH-2 : TP600/APR-12 board (2.PB.L signal)
Ground at E600
Oscilloscope setting :
CH-1 : 200 mV/DIV
CH-2 : 200 mV/DIV
TIME : 5 ms/DIV
n
“1.PB.L” signal (TP500) is the playback signal of
the CH-1 of the AT head.
“2.PB.L” signal (TP600) is the playback signal of
the CH-2 of the AT head.
3. Set the Alignment Tape
Set the CR8-1A/PS and put a weight on the
cassette so that it does not rise up.
Weight about 1000 g is suitable.
