3M DELTA Series - Operational Options

properly. Overrides all other operations within
the machine.
2. Ready Lamp — On when cartridge is loaded
properly. Flashes as supplied from the factory
after cartridge has played and cued. For optional
operation of the Ready function, see SECTION II
F. Operational Options.
3. Start Switch — Active whenever the cartridge
deck is in Ready or CUE mode.
4. Run Lamp — On when in RUN mode.
5. Cue Switch — Used for high speed cue and
audio mute from STOP, START, or RECORD (can 
cels record set) modes. Pressing CUE while in
high speed mode causes audio to turn on for the
duration the switch is held.
6. Cue Lamp — On when in CUE mode.
7. Record Set Switch — Active only in the READY
mode. When pressed, program audio signals
are switched into the recording amplifier circuit.
Pressing START causes the recording process to
begin.
8. Record Set Lamp — A visual indication showing
that the machine is either ready to record or in
the process of recording. This lamp will flash if
the 1 kHz cue record defeat has been activated.
9. 1 kHz Cue Record — Enables the operator to
record a 1 kHz primary cue tone at any desired
time as in the case of editing a tape. Automatic
timing of the tone length is controlled by the
microprocessor. The switch is active in a play 
back or recording mode. The 1 kHz cue detector
is automatically defeated as the 1 kHz tone is
being recorded.
10. 1 kHz Cue Defeat — Active only in a READY
mode (no tape running — READY and RECORD
lamps on). When pressed, this mode is indicated
by a flashing record set lamp.
11. Secondary Cue Switch — Active in either record
or playback modes. Used to record a secondary
(150 Hz) cue tone on the cue track. A remote
switching signal occurs in the playback unit
upon sensing of the cue tone. As supplied from
the factory, high speed recue is initiated at the
end of secondary cue tone when the unit is in
playback mode. Jumper provided on Play Card
to defeat high-speed cue if desired.
12. Tertiary Cue Switch — Active in either record or
playback modes. Used to record a tertiary (8
kHz) cue tone. A remote switching signal occurs
in the playback unit upon sensing of the tone.
Reproducers can be programmed (jumper op 
tional) to initiate high-speed recue at the end of
tertiary tone rather than secondary tone, if de 
sired. Jumpers are located on the Reproduce
Amplifier/Cue Detect Card.
R. BIA*
L. BIAS
LBVIL
be
CUI BIAS
R. 10. 1
METER
BET
cue
rec .
LEVEL
CUI
T
METER
1
REC. BIAS
REC. BIAS S
RLAYfl
CUI BIAS a
REC. SIAS K
PLAYS
CUI PLAY fl
R. REC.
METER
MT
fl
L. EQ. S
RIGHT
•METER
•rr a
LEFT „
■METER S
BET -f
3
Figure 2-8
13. Meter Monitoring — The two front-panel switch 
es, REC and PLAY, are used in conjunction with
the internal two-position slide switch (mounted
on the top edge of the Record and Meter Amp
board) in order to monitor the various machine
functions. The following explanation describes
the metered indication as related to switch posi 
tion and Record Amplifier mode:
Meter Switch _____ Indicates:
Actuated Left Meter Right Meter
REC Depressed
Machine in
"Record Set"
Mode, Recording
Left Pro 
gram input
level
Right Pro 
gram input
level
REC Depressed
Machine in
Reproduce Mode,
playing tape
Left Pro 
gram output
level
Right Pro 
gram output
level
PLAY Depressed,
Machine in
either Record
or Reproduce
Modes
Left Pro 
gram output
level
Right Pro 
gram output
level
NEITHER PLAY
or REC Depressed,
Slide switch in
“ CUE" position
Cue Play
Cue Bias
Slide switch in
"REC BIAS"
Left Pro 
gram Bias
Right Pro 
gram Bias
position
2-7