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Pioneer CT-777 Service Manual page 28

Stereo cassette deck
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P14 |
song
Blank detection signa! input. Blank when "L".
6—bit compensation level signal output for meter A/D.
BIAS-DOWN_
| Control output for BLE power drive bias volume when Ver VR-BLE is ON. When DOWN is "L" and
UP is "H", the volume rotates clockwise and the bias current increases. When DOWN
is "H" and
UP is "L", the volume rotates counterclockwise and the bias current decreases. The power drive
BIAS-UP
bias volume stops when the output status is "L", "L" or "H", "H".
es
RESET
Reset input for main CPU. Reset when "L"; programming starts when "L" — "H".
BIAS-5
BIAS—4
Not used when Ver VR-BLE is ON.
BIAS-3
BIAS-2
METER RESET | Used to speed up A/D operation in BLE mode. Meter circuit is discharged when "H".
BIAS
Control output for bias ON/OFF during recording. Bias is ON when "H".
15 kHz MUTE.
| Used in accordance with the test signal for BLE tuning. Muting is ON when "H". Both are ON when
the signal is 400 Hz. Only 15 kHz MUTE is ON when the signal is 3 kHz. Both are OFF when the
3 kHz MUTE | signal is 15 kHz.
RM-PLAY 2
For PLAY and REC (L) mode, PLAY torque is lowered only for the first 5 to 15 minutes of tape
oO
DRMPLAYT | winding. During tape return and BLE rewind, tape speed is varied using the control lines of
RM-PLAY 1
PLAY-—2, PLAY—1 and MS.
RM-MS
Mechanism mode
RM-L
STOP, PAUSE, PLAY/PAUSE, REC/PAUSE
-
-
~
AM-SLOW
Assist motor control output. When DOWN is "L" and UP is "H', the mechanism raises the head
base, and when DOWN is "H" and UP is "L" it lowers the head base for ejection of the tape. SLOW
AM-DOWN
:
ane
;
3
,
é
:
output is set to "H" only during the servo operation after one assist motor operation and during the
AM-UP
assist motor operation between the EJECT and STOP mode.
47

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