Table of Contents
Advertisement
3. ADJUSTING THE ELECTRICAL SECTIONS
@
Measuring instruments necessary for adjust-
ments
(1)
Audio signal generator
(2)
Variable resistance attenuator
(3)
Electronic voltmeter
(4)
Oscilloscope
(5)
Frequency counter
(6)
Adjustment screwdriver
(7)
Trap coil adjustment square stick
(8)
Test tapes (A-BEX TCC-112)
(A-BEX TCC-130, TCC-153, TCC-262B/162B)
(TDK AC-514)
(9)
Transport Check cassette tape (A-BEX TCC-902)
(10) Lead line with alligator clip
3.
(1)
e Caution on adjusting
(1) Before adjusting, clean the head surface, capstan and the
(2)
pinch roller with a gauze or a cotton swab moistened with
alcohol.
(2)
Demagnetize
the R/P HEAD
and the E. HEAD
with a head
eraser.
(3)
Completely demagnetize the adjustment screwdriver.
(4)
Unless
instructed
otherwise,
set the various
controls
as
FORWARD
MODE
MODE
REVERSE
Checking and Adjusting the Tape Speed
Connect the frequency counter to the LINE OUT terminal and
load test tape (A-BEX TCC-112)
Load cassette tapes on both cassette decks A and B. Next, on
the deck (A or B) whose speed is to be adjusted, while holding
down
the PLAY,
FF and
REW
buttons
together,
press
the
POWER switch. After the power has been on for about two sec-
onds, the Remote Control Indicator "I" in Display will light up
and the cassette deck will begin to play in speed adjustment
mode.
© DOLBY NR SWIth o....ceccccsssscsssssesssecssseeessecssseeaseesseesnes OFF
(3) At first high speed adjustments, press the DUBBING SPEED
O
BIAS volume
.. Center click position
"HIGH" button and use Meter Unit RT554 for Cassette Deck A
1.
Tape Transport Check
Load the transport check cassette.
in the operational
mode,
iluminate the fixing guides of the R/P HEAD with a tamp and
check to make sure the tape edge does not come in contact with
the tape guide section.
The tape transport is the most important element in determining
the performance of a cassette deck.
Avoid moving the various adjustment screws, nuts, etc., as much
as possible. Refer to the pages on "Adjusting and Checking the
Mechanism Section" when replacing or adjusting the R/P HEAD.
2.
Adjusting the Azimuth
(1)
After completing the tape transport check, load the test tape
(A-BEX TCC-153).
and RT552 for Cassette Deck B.
Next normal speed adjustements, press the DUBBING
SPEED
"NORMAL" button and use Meter Unit RT553 for Cassette Deck
A and RT551 for Cassette Deck B.
(Note that speed adjustment mode is cancelled when the tape is
ejected.)
F Counter
LINE OUT
A-BEX TCC-112
(2)
Playback the test tape; adjust the azimuth screw so that
6 a
i AO a
hh Me EN AA
otS E
th np tt be
A
mrt
ente Se
#
| i
: |
j
:
N
NR
Advertisement
Table of Contents
