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| TD-W20A/B/C/E/G/J;
Standard
value
Play mode:
within 3 sec
FF/REW mode:
within 5 sec
Adjusting
point
Checking
Play back the tape. In playback mode,
auto-stop
check that the tape run stops within 3
opeartion
sec at the end of the tape. In fastfor-
ward or rewind mode, check that the
tape stops within 5 sec at the tape end.
If the head is worn, disconnected
or
exceedingly
magnetized
so as not to
Screw
A
(left side)
1. Connect an electronic voltmeter to
the LINE OUT terminals.
Adjusting
REC/PB
head azimuth| 2. Play back the TMT 7008 test tape.
each
provide the necessary characteristics,
3. Adjust
the head
angle with
the | Deck
replace it with
a new one.
screw
A
until the reading of the
peck
a
After replacement,
the head position
electronic voltmeter becomes maxi-
mum for both channels.
4. After adjusting, set the screw with
screw bond.
adjustment as well as the playback level
adjustment,
the bias current
adjust-
ment
and the recording
level adjust-
ment are all necessary.
If the output difference between the
left and right channels exceeds 3—4dB,
the head is defective.
Replace it with
a new one.
3. Electrical adjustments location
@ Main Amp P. W. Board (parts assembly side view)
(Turning in the direction of the arrow increases the level.)
VRIOL
INPUT
VR
u
"
o
?
é
=
o
z
S
S
Pa
S|
r
8
4
=
9
°
=
g
BIAS F Adj
<
-
a
z
Lao!
u
2
rs
3
=
6
be
4
a
o
=
a
Qs
rec
cever
vate C))
BIAS Ad.
| caterer
ene
era
|
Rch
Lich
VRMO3
VRMO4
[J SPEED Ads
NORM
i)
| Radi To
RIO,
P.B EQ
| ras
F203 f
i
oo
HIGH
_
REC -- PB
VRMOI
VRM02
HISPEED
CHECK
G3 SPEED
Adj
00
Reh
(A) P. 8. GAIN
Ag)
Fig. 11
(No. 4256) 9
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