network 600 - Cassette Alignment Chart; R;P Head Adjustment; Dolby Level Adjustment; Level Meter Adjustment

ALIGNMENT CHART
Step
|
tem
—
|
Condition
|
Input
signal
Procedure
Output
test
point
Remarks
2
—
Adjust the semi-
fixed resistors
VR601 (R),
VR651 (L)
adjustment
R/P
head
Tape
selector
|
MTT-114
1)
Playback
the
T4(R),
T2(L)
by
|
VTVM
should
adjustment
|
switch;
normal
|
(10Khz,-10dB)
|
test
tape
VTVM
read
maximum
Dolby
NR
|
2)
Adjust
the
:
|
output.
The
switch:
off
azimuth
adjusting
:
difference
between
screw.
.
R
and
L
shouid
be
within
2dB.
Dolby
MTT
150
Playback
the
|T4
(R),
T2(L)
bY
|
VTVM
should
2
Level
(400Hz,
OdB)
test
tape
VTVM
|
read
580
mV.
Level
meter
MTT-150
1)
fines
the
Level
meter
Level
meter
adjustment
(400Hz,
OdB)
|
9)
Adjust
the
semi-
indication
should
indicate
fixed
resistors
_
Dolby
mark
VR604
(R)
VR654
(L)
(+3VU)
Erase head Frequency
/ counter should
Bias
Tape
selector
Blank
tape
|
1)
Insert
blank
tape
frequency
switch
:normal
and
activate.
(P55,
P56)
adjustment
RECORD
mode.
|
by
frequency
read
67
KHz.
2)
Adjust
oscillator
|
counter
coil T611. |
1) Insert blank tape
Blank
tape
VTVM
should
Bias trap Tape selector
adjustment
switch:
normal
—
and
activate
read
minimum
|
RECORD Mode. TP. P53 (R),
2) Adjust trap coil TP. P51 (L)
— T602 (RA), by VTVM
T652 (L).
19kHz
trap
19KHzt2Hz
Set
the
deck
in
T4
(R)
VTVM
should
adjustment
-10dB
audio
RECORD
mode
|
T2(L)
read
minium
—
|
signal
thru
and
apply
the
by
VTVM
aux jack. signal
2) Adjust 19kHz trap
coil T601 (R),
T651 (LI,
Insert blank tape
and activate
RECORD mode.
Adjust the semi-
fixed resistors
VR605 (R),
VR655 (L)
Record the signal
on MTT-501,
Rewind and play-
back the recorded
tape
Adjust the semi-
fixed resistors,
VR603 (R),
VR653 (L).
~=——
VTVM should
read 4mV.
TP. P53 (R)
TP, P51 (L)
by VTVM
Tape selector
switch: normal
Bias
current
adjustment |
Blank tape
2
~—e
VTVM shouid
read 580 mV
1kHz audio
signal thru au
jack. . *
Tape selector
swi tch ‘normal
Recording
sensitivity
adjustment
2
a
3
—
For
Service
Manuals
Contact
MAURITRON
TECHNICAL
SERVICES
8
Cherry
Tree
Rd,
Chinnor
Oxon
OX9
4QY
Tel:-
01844-351694
Fax:-
01844-352554
Email:-
enquiries@mauritron.00.uk
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