TANDBERG TCD 310 Service Manual

3. MECHANICAL SERVICING
3.1 MICROSWITCHES MS 1 AND MS 2
Pinch rollers released:
MS 1: Check that there is a gap of about 1 mm
between the connecting arm and the middle
leaf of the switch (see figure).
MS 2: Check that the two leaves of the switch are
pressed together between the solenoid
operating lever and the bracket. Adjust by
bending the bracket.
Pinch rollers operated:
MS 1: Check that the left and the middle leaf are
pressed together.
MS 2: Check that the switch is open.
3.2 TAPE PATH ADJUSTMENTS
The following equipment is needed:
— An ordinary high quality cassette which has been
cut open so that the tape is visible (see figure).
— Tandberg test tape No. 23 (azimuth test).
For really extensive adjustments — for example if several
parts in the tape path are replaced — a Tandberg Adjustment
Plate may be needed. Such adjustments should be carried
out by a Tandberg representative.
3.2.1 Outline of the adjustment procedure
Insert an open cassette and set the deck to PLAY.
Check that the tape does not ”climb”’ on the
capstans and is not bent or folded at the tape
guides. Also check that the tape does not ”bulge”
at the heads (’*bulging” indicates wrong azimuth
adjustment of the heads). When viewed from above
the tape should be seen as an almost invisible line.
Also check that the top of the erase head is flush
with the top edge of the tape. The erase head
should not be visible above the tape.
If erratic tape motion is observed, try to eliminate
it by turning the adjustment screws for heads or
pinch rollers.
Insert a Tandberg test tape No. 23 and adjust
with the screw (AZ) on the record/playback head
to maximum output signals on both OUTPUT
sockets. The difference between the tracks should
be less than 4 dB. (Details: see next page.)
Tandberg Adjustment Plate

TANDBERG TCD 310 Specifications

General

Weight	7.5kg
Track System	4-track, 2-channel stereo
Tape Speed	4.76 cm/s
Heads	1 x record/playback, 1 x erase
Type	Cassette Deck
Frequency Response	30 Hz to 16 kHz (Chrome tape)
Signal to Noise Ratio	58dB
Wow and Flutter	0.07 %
Motor	DC servo motor
Tape Type	CrO2
Power Supply	220V
Input	Line In