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Verfügbare Sprachen
Verfügbare Sprachen
IN AND OUTPUTS
Indication
For the connection of
Sensitivity
| Impedance|Socket type {| Connections
Location
HEADPHONE | stereo headphone
400 0
5p,360°,DIN
front
BU2
MICRO
L+ST | mono microphone for recording
:
front
on the left channe!, a stereo
microphone
BU
MICRO
R
mono microphone for recording
front
On the right channel
BuU101
LINE IN/OUT} second recorder or another set
rear
provided with a 5-p 180° DIN
input/output socket
input pins
: 1 and 4
output pins: 3 and 5
PHONO
record player
BU3
input pins: 3 and 5
MONITOR
amplifier
79,270°,DIN
rear
BU4
recorder
REMOTE
remote control unit
5p,240''*,DIN
point 5/rear
N6718
=
Oo, 3 50
BU5
ee
OPERATION
OF THE CONTROL
SECTION,
Fig. 4
The description is divided in 6 chapters:
- Drive
- Tape tension control
- Electrical brake
- Delay circuit
- Recorder stop unit
- Speed control
Drive
To prevent the burning-in of the START,
PAUSE,
REW and WIND switches when the motors are
switched on, the transistors TS9, TS13 and TS$14
take over the switching functions. The impedance
of the braking magnet RE2 also determines the
adjustment of these transistors.
Start position
The base of TS392 is not sufficiently negative in
respect of the emitter to make
the latter conductive.
Thus, the base of TS391
is negative towards the
emitter: TS391 will conduct.
Via the base emitter diode of TS9 paralle! to R308
and via T$391 the braking magnet RE2 is excited
(brake is released), TS9 becomes conductive: the
pressure roller magnet is excited and the mains
voltage applied to the two reel disc motors M1,M2.
C$55244
C44 is a short circuit for the switch-on pulse: via
R56 an extra starting current is applied to the right
reel disc motor M2, so that the speed required is
quickly reached, preventing tape loops to occur.
By means of the capstan the tape gains full speed
immediately.
After the switch-on pulse, the voltage for the right
motor M2 will be supplied via R57.
Rew position
Via the base emitter diode of T$13, parallel to
R309, the braking magnet is excited.
TS13 becomes conductive,
so that the mains voltage
is applied to the left reel disc motor M1 via D6.
D5 prevents that the pressure roller magnet RE1
is
excited. The right reel disc motor M2 is attracted
by the tape and will work as a generator.
The voltage generated is negative towards the
terminal voltage of the motor M1. The voltage
generated by M2 via D11
is the mains voltage for
the circuit of the tape tension control. D2 prevents
this voltage to excite the pressure roller magnet RET.
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