TANDBERG TCD 310 Service Manual

Adjustment of erase head. Insert the open cassette
and move the mounting plate inwards. Adjust with
the screws (H) and (AZ) so that the top of the
erase head is flush with the top edge of the tape.
The front of the erase head should be parallel with
the tape.
Set the deck to PLAY. Check that the erase head
is not visible above the tape, and that the tape does
not bulge” at the head.
Keep the head mounting plate parallel with the
underlying mounting plate.
The screws (H) must not be unscrewed too far, as
the spring under the head mounting plate will then
prevent the mounting plate from moving freely.
An Adjustment Plate can also be used. In this case the top
of the erase head should be flush with tab D. The front of
the erase head should be parallel with the tab.
M@ Record/playback head
The position of the record/playback head is adjusted
by turning the screws on the head bracket. Do not
touch the adjustment screws for the head mounting
plate. It is assumed that the head mounting plate
has already been correctly adjusted
Height and parallelity. Insert the open cassette and
move the mounting plate inwards. Adjust with the
screws (H) and (P) so that the tape fits exactly into
the tape guide of the head. The front of the head
should be parallel with the tape.
Set the deck to PLAY. Check again that the tape is
not bent or folded at the tape guide, and does not
*bulge’’ at the head.
Azimuth. Insert a Tandberg test Tape No. 23
(6,300 Hz azimuth test). Connect a voltmeter to
each OUTPUT socket and set the deck to PLAY.
Adjust with the screw (AZ) to maximum output
signals with no more than 4 dB difference between
the tracks (adjust to best compromise).
Check the height and parallelity again, and re-
adjust if necessary. If readjustments are made, the
azimuth must be checked again.
If an Adjustment Plate is used, the parallelity must be
checked against tab F, and the height against tab E. Do not
turn the screws while the tape guide of the head touches
tab E as this may cause bending of the tape guide.
Tracking control. Insert an ordinary cassette and
record a signal on both tracks. Then turn the
cassette around and set the deck to PLAY. Listen
for crosstalk on the recorded piece of tape.
Head mounting plate
Right chassis plate
Adjustment screws for erase head
Tandberg Adjustment Plate
Adjustment screws for record/playback head
Open cassette

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