Teac A-550RX - Page 10

A-SSORX
Deck
NR SYSTEM sw. — OUT
settings:
INPUT sw. — LINE
OUTPUT cont. — Spec. position
(item
2)
TEAC test tapes:
MTT-506 or similar: For record test with
Co (CrO2)
.
MTT-501 or similar: For record test with
RECORD cont. — Spec. position
NORMAL
\f freq. response is wrong, recheck steps 11 and 17.
12.5 kHz +2, —4 dB
5-5
RECORDING
PERFORMANCE
(Item
8)
METAL
tape:
For
record
test
with
METAL
MODE/
SIGNAL
ADJUST
ITEM
CONNECTION
INSTRUCTION
SOURCE
(or
CHECK)
OUTPUT
REMARKS
VTVM
between
TP3/TP5 (on
Record-pause
mode
No signal
i.
ee
.
.
40.
Bias
tra
R/P
amp!.
PCB)
record.
PCR)
4
Min.
reading
Stas
Tee
and
GND
areal
i
Movies,
| Cs
Fig.
5-2
i
"
(on
DBX
PCB)
fs
L
|
Spec.
REC
condition
Spec.
REC
cond.
400
Hz
&
10
A
his
:
Sites
/
METAL/METAL
kHz alternate-
| VC101/VC201
Equal level at
C
Tic
Beewe
Bide
(4
Unig?e
ColCrOz)/MTT-506
|
ly/-42dB
|
VC102/VC202
|
both
trea.
bari
\
NORMAL/MTT-501
(6.15
mV)
VC103/VC203
:
.
spec.
LINE
input
posi-
L
tion
(Item
8)
Spec.
REC cond.
;
400
Hz/—12
.
METAL/METAL
R18/R28
12.
Record level
Fig,
5-2
J
Co(CrO>)/MTT-506
cart
i
R17/R27
—8
dB
(308 mV)
|
NORMAL/MTT-501
R16/R26
+
t-
Check
steps
VTVM
between
Record-pause
mode
13
thru
16
TPIL/TPIR
(on Spec.
REC cond.
1
kHz/—9
dB
only
after
DBX
PCB)
and
|
NR
SYSTEM
—
dbx
(275
mv)
Checks
580
mV
(—2.5
dB)
|
vou
are
sure
:
GND
that
75-6
is
13.
SB
ouee
nin
correct.
Poi
h
S
it
hog eS
ao Ae
Ss
SN
eee ee
USS
ee ee
See
oR
a
ae
hd
Seite,
VTVM
between
|
TP2L/TP2R
(on
1
kHz/—14.5
DBX
PCB)
and
dB
(146
mV) VR105/VR205
—8
dB
(308 mV)
GND
Same
as
above
400
Hz/—12
dB
Fig.
5-2
/MTT-50
VR106/VR206
—8
dB
(308
mV)
Reference
14,
dbx
decoding
|
Ieeieceler
eae
Daas
Sie
es
ca
I
a
Onan
Mba
RAS
once
|
Wa
RE
eee
es
revel
but
NR
SYSTEM
ae
0
+0.5
dB
deviates
—OUT
‘
ee
from
ref.
==
j{__
|
So
Spec.
REC
cond.
:
15.
ee
Fig.
5-2
NR
SYSTEM
—
dbx
400
Hz/—12
fhek
Lids
or
less
distor-
® Check
w/
3
types of
dB
(195
mV)
tape
pe Ralaieaa
ab
Ratio
of
spec.
16.
ae
en
Fig:
5-2
Same
as
above
then
Check
65
dB
min.
ratio
er
=o
no
signal
noise
record
|e
17.
Total
harmo-
Check
w/
3
types
400
Hz/—12
2%
or
less
distor-
nic distortion
Fig.
5—2
of
tape
|
dB
(195
mv) Check
tion
40
Hz +2,
-4
dB
-REC
d.
40
Hz~14
gt
Fig.
5—2
Feat
ane
kHz/—42
dB
|
Check
eee
kHz
RCT NREEEN
Re
tinier
Lecomte
ol
coneete
14
kHz
+2,
4
dB
18.
Frequency
a
i
7
SRa
Gear
ar’
|
ehasecaind
rast
Reference:
response
|
He
eg ee
bat
he
ee
ages
Ul
cen
Saal
eel
neem
poten
oe
paced
|
400
Hz
40
Hz
+2,
—4
dB
40
Hz ~
12.5
,
f
~6.3 kHz +2 dB
“
NORMAL/MTT—501
kH2z/—42
dB "
atin na
cme
(6.15
mV)
i
NOTE:
The
bold
arrows
in
the
charts
show
the
point
up
to
which
a
particular
control
setting
or
condition
must
be
maintained.
10