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SECTION 2
7
7
ADJUSTMENTS
2-1.
MECHANICAL
ADJUSTMENTS
AND
|
MEASUREMENT
-WM-11D/23. WM-11D/23_
2-2.
ELECTRICAL
ADJUSTMENTS
Playback Head Azimuth Adjustment
Tape Speed Adjustment
PRECAUTION
power supply voltage
:3Vdc
Mode:
playback
| speed checker
LFM-30
rubber belts
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ae
VTVM
digital frequency
'
ef
gecm
z
6.3 kHz, -10dB
test tape
.
counter
ren
aoe
0.3-0.72oz~inen) | SON
|
WS-48A
|
noted.
Specification:
levels match together within 1 dB.
Speed checker
Digital frequency counter
—
L-CH
Frequency
difference
between
the
beginning
peak
and the end of the tape should be within 1%
Head Height Adjustment
(30 Hz).
1.
Prepare an adjustment cassette as shown below.
Rees
Location:
R-CH
Screw peak
RV601
position
adjustable resistor
L-CH
R-CH
|
peak
peak
>
3.
Phase Check
Mode:
playback
322
2.
In record mode
and viewing from the front,
adjust the head heights to eliminate tape curl
and tape twist at arrowed portions.
HEADPHONES
Adjustment Location:
|
Screen pattern
in phase
45°
90°
135°
180°
—__—_y————_
7
good
wrong
Sees
heey
4.
After
the adjustment,
lock the screws
with
Head Azimuth adjustment screw
Shim, head height adjustment
locking compound.
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