Pin No.
Pin Name
I/O
Description
38
End sensor to detect the tape’s terminal (Lead taps section).
If “H” is detected signal in the REW, REV modes, the mechanism stops and ejects the
cassette automatically.
Ground.
End sensor to detect tape’s terminal (Lead tape section).
If “H” signal is detected in the FF mode, then REW mode will occur automatically.
1. When the tape is transporting. Reel pulses are input.
2. If the tape is transporting and take-up reel pulses are not input during regular time,
the unit stops at STOP point automatically.
3. Distinguishes the tape type, counts the tape remaining and reduces the tape speed at
the end of FF/REW modes.
1. When the tape is transporting, Reel pulses are input.
2. Distinguishes the tape type, counts the tape remaining and reduces the tape speed at
the end of FF/REW modes.
3. If supply reel pulses are not detected, FF/REW mode is not operating normally.
And the unit stops at stop point automatically. (Refer to table of pin 17.)
System detect for B/G or SECAM in VV/EE mode. (from SECAM I.C)
Not connect
Not connect
Port to detect AFT (+)’s state during tuning. When more than 4V, is detected by AFT
(+) detector.
Detects AFT (–)’s state during tuning. When less than 0.96V, is detected by AFT (–)
detector.
A DC bias level set by VR501 determines the pulse width of PG M.M for H. S/W 30
switching interval.
Not connect.
1. Reference input signal to perform auto tracking mode.
Video envelope (F/F) signal is input through LPF.
2. Perform auto tracking mode by sampling video envelope signal which is input
during a period of head switching and changing servo tracking data to obtain
maximum value.
Note : When the DC level of the envelope is at its maximum, it is considered tracking
properly.
KEY RTN 0
1
2
3
4
5
6
7
8
9
13
TAKE UP
SENSOR
VSS (A/D)
END
SENSOR
TAKE UP REEL
SUPPLY REEL
SED DET “H”
NC “L”
NC “R”
AFT
KEY RTN 0
IC DESCRIPTION
IC, HD3977RC06F
Each operating mode
Sec
PLAY, REC
SP=3 EP/LP=6
FF, (REW)
2
CUE, (REV)
1
I
I
I
I
I
–
–
I
I
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