Teac A 4000 A 4010 Service Manual
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Extracted text from Teac A 4000 A 4010 Service Manual (Ocr-read)
Page 1
Wiginal
TEAC
A'4000 STEREO TAPE P L A Y E R
A-40'I O STEREO TAPE RECORDER
SERVICE MANUAL
TEAC CORPORATION
Page 2
NOTICE!
The serial number of TEAS Model A-AOOO-Series starting
at #8354 is hereby announced that the head alignment
has been altered as the following Fig. 9-1 instead of
previous Fig. 9.
REVERSE FORWARD
PLAYBACK HEAD PLAYBACK HEAD
AZIIYIUTH HEIGHT AZIMUTH HEIGHT
ERASE HEAD RECORD HEAD
AZIMUTH HEIGHT AZIMUTH HEIGHT
PLAYBACK RECORD PLAYBACK
ERASE HEAD REVERSE HEAD HEAD FORWARD HEAD
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FIG. 9-1 HEAD ALIGNMENTS
Page 14
C ONTROL BUTTONS
Tape transport selector switches consist of 4 push-buttons, 7 micro-
switches and a solenoid for the fast button (Fig. 21). The push-button
operate the transport for the following functions: (See Figs. 15 thru
17)
.
l.
FORWARD PLAY (button marked E:> )
When the forward play button is depressed:
a. The brake solenoid is energized, freeing the turntables. This
solenoid latches itself and remains energized after the button
is released.
b. Reduced voltages are supplied to the left and right reel motors
through resistors R304 and R303 respectively.
c. The pinch roller solenoid is energized, pulling the pinch roller
against the capstan.
REVERSE PLAY (marked <
When the reverse play button is depressed:
a. The brake solenoid is energized, freeing the turntables.
b. Relays RL-Z, RL-3 and RL-A are energized.
c. RL-B reverses drive motor rotation by switching the polarity of
d. RL-Z reverses reduced voltage supply to left and right reel
STOP
gaged through Spring tension.
FAST FORWARD
When the FORWARD and FAST buttons are depressed either simultaneously
or FORWARD and FAST in that order:
a. The brake solenoid is energized, freeing the reel turntables.
b. Full AC line voltage (117 volts) is supplied to the right reel
c. The pinch roller solenoid is not energized.
- 12 _
one main field winding.
motors by selecting preset taps on h-BOA and R-303 respectively.
Depressing the STOP push-button releases all relays and solenoids.
Voltage is removed from the capstan and reel motors. Brakes are en-
motor.