Table of Contents
Advertisement
9-2. Linearity adjustment
[Checkpoints]
Oscilloscope CH1 Test pad PG (MA PCB)
Oscilloscope CH2 Test pad PBO (MA PCB)
[Procedure]
(1) Connect an oscilloscope.
ae
(2) Set the Test Mode (Power switch is turned on while. press down
together with STOP. PAUSE and REC/MUTE buttons, then press the
STOP button again).
.
(3) Insert test tape TY-7251, and press the play button.
(4) Adjust the height of the mechanical tape guide so that the PB pad is
positioned as shown left (the upper and lower lines are parallel to the
center line).
Caution:
1) Atthe adjustment, be sure to move the two guide rollers within +90° and |
paint the original position with a marker. Also make sure to check the
tape running as follows.
Gap
La Pole P2
N.G.
i le Pt
+s
SS
ole
0"
a
ao
Guide Roller
Pole
Note: Be sure not to move two poles.
Pushing the tape
Tape —~ OK
Fit atlower side
~
2) Be sure to punch at the hole as show below.
Punch the hole
3) If the tape is out of the position, the following DATA envelopes are
observed.
Out
Ri
piewenca or euthanse
eee
eee oe |
Supply
side
Take-up
side
A/B = Less than3 dB
A/C = Less than3 dB
Advertisement
Table of Contents
