Hitachi D-E99 Service Manual page 17

D-E99
Pin
Pin Symbol
Function
No .
•
10
LINE MUTE • LINE amp final stage muting control output pin.
Outputs Hi potential during REC, PLAY and REC-PAUSE after recording to mute the
play signal of the LINE amp output. Hi potential is output after elapse of the inhibit time
of 120 ms during play, after elapse of the inhibit time of 400 ms during record and after
elapse of the inhibit time of 1100 ms when changing the mode from FF or REW.
11
REW SOL.
REW solenoid drive output pin. Outputs Lo potential normally and Hi potential during
REC, PLAY and REW.
- -
-
-----------
12
FF
SOL.
FF
solenoid drive output pin. Outputs Lo potential normally and outputs Hi potential
I
during REC, PLAY and FF.
'
13
PAUSE SOL.
i
· PAUSE solenoid drive output pin. Outputs· Lo potential normally and outputs Hi potential
I
during REC-PAUSE mode and PLAY-PAUSE mode.
I
-·---------------------~
•
14 NC · Blank pin.
- - - - - - - - · - - -
15 RESET
I
· Initial reset input pin. This pin input is set to Hi potential when power is supplied to
perform initial resetting.
- -
-----~
16 GND
· Connected to GND
- - - - -
- -
17
osc
1
· The external resonance circuit is coupled with these pins to operate the built-in clock
•
18
osc
2 oscillation circuit which is the reference of microprocessor operation. The oscillat1on
frequency is set to 400 kHz.
-
- - - - - - - - - - - - - - - - - - - · - - -
19
HALT
·HALT pin. This pin changes from Lo potential to Hi potential when power is supplied
I
and the program of the microprocessor is executed. It is set to Lo potential when povier
is set to OFF and the execution of the program stops and is held.
-~
20
TEST
• Microprocessor test pin. Connected to Vee pin
@
because this is not used.
•
21 Vee
• Power pin. Applies +5V.
-
22 VCA SELECT 0 • A TRS IC (HA 12035) control output pins. Output during REC, REC-PAUSE and REC-
I I HOLD, and designate the object of the ATRS IC internal circuit to be controlled by
t~e
24 VCA SELECT 2 control data output from the data output pins
.~~~~'·
These outputs are composed Df
the 3-bit signal.
Output pins
@
@
®
Designation function
I
0 i 0
- - - - - - - -
0 Designates that data has no meaning.
0
I
0
1 Designates that it is 1 kHz, Leh data.
- -
0
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1 0 Designates that it is 14 kHz, Leh data.
I
0
I
1 1 Designates that it is bias data.
· - - - - - - - - - - -
1 0
0
Designates that 14 kHz, R eh data.
- -
1
0
1 Designates that it is 1 kHz, R eh data.
1 1
0
Designates that 1t is
AID
comparison reference voltage.
I
1 1 1 Designates to clear all data.
I
· Auto/memory rewind switch and timer switch position detection output pin. Outputs 1'1
when detecting switch position.
- 21 -
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