Hitachi D-RV7 Servicehandbuch Seite 14

D-RV7
Terminal Terminal Function
No.
name name.
13 PEI REC Recording amplifier
MUTE
14 PE2 BIAS Bias oscillation circuit
PE3 MODE Clock output terminal
15
The PROT/HEAD
16 DATAO
Data output terminals
17 PFI DATAI 8-bit data is output
18 PF2 DATA2 terminal.
19 PF3 DATA3 When the PED3 terminal
minal is on the "H"
level.
When the head is on the forward
after counting up.
C C" is displayed at stopping at the tape end after counting down. This is reversed
when the head is on the
Display by 8-bit data.
02
o O O
o o o
o 1 o
1
1 O o
1
1 1 o
20 TEST TEST + B (IOV)
21 vss vss (IOV)
RMF Output terminal for reel motor
22 PGO
The reel motor rotates
23 PGI RMR
L levels, respectively,
levels, respectively.
level.
PGO is used as an output
24 PG2 AM F Output terminals for assist motor
The mechanism position
25 PG3 AMR
when PG2 and PG3 are on the "H"
forward direction to the reverse direction
levels, respectively.
level.
PHO
26 OUT- The "H" level is output
PLAY
voltage change-over.
Functions
muting control output terminal.
control output terminal.
for counter microcomputer control.
detection change-over signal of the PD3 terminal is output.
for counter microcomputer control.
from PFO PF3 in synchronization with the clock of the PE3
is on the "L" level, the counter counts up when the PFO ter-
level, and counts down when the same terminal is on the "L"
side, *End" is displayed at stopping at the tape end
reverse side.
MODE Micro-
computer
1
output
DO 02 DO Display
o o o o
0/1
1
o o o o
0/1
1
o o o o
0/1
1 1 1 1 R -15
End
0/1 o o 1
o o o o
0/1
1
0/1 (Anything)
Counter display
O o o o
5
0/1
1 1 1
(Anything)
control.
in the F.F direction when PGO and PGI are on the
and in the REW direction when they are on the "L"
The reel motor stops when both PGO and PGI are on the
terminal for detection of the mode switch.
control.
shifts from the reverse direction to the forward
and "L" levels, respectively. Also it shifts from the
when PG2 and PG3 are on the "L"
The assist motor stops when both PG2 and PG3 are on the
during PLAY and REC/PLAY to perform the reel motor
— 25 -
Function
Term inal Terminal
No.
name name
27 PHI TIMER
28 PULSE
29 PLAY.S
30 PIO pAUSE
IND.
31 PII PLAY
IND.
32 P12 REC IND.
33 MUTE
34 REC
35 pAlJSE
36 p A3 STOP
37 PBO REW
38 PBI
39 PB2 R-PLAY
"H" and
40 PB3 F _p LAY
and
VGG
41 VGG
42 CLO CLOCK
direction
and H
L
Functions
Output terminal for timer PLAY, REC/PLAY.
The "L" level is output for 4 seconds after the power switch is turned to ON, and the
"H" level is output when the program makes an input
seconds.
When tape ended during PLAY, REC/PLAY or in the SEARCH
output after 3 seconds during PLAY and REC/PLAY,
SEARCH mode.
The head reverses when the PDO terminal became the ' 'L" level during output
H level. When the PDO terminal does not become
this terminal lasted 500msec, the mechanism is set to the stop mode, and this terminal
also assumes the "L" level.
Output term inal for system control one-touch system.
The ''H" level is output when this unit assumes a PLAY
change over the function of the one-touch system. The "L"
this unit was set to the stop mode.
The PAUSE indicator control output terminal. The "H"
mode.
500msec and 50msec pulses are periodically output during
the TAPE STANDBY mode, respectively.
The "H" level is output when the PAUSE key is pressed in the SEARCH
The PLAY indicator control output terminal. The "H"
motor is stopped.
Pulses are output in synchronization with reel pulses in the PLAY
125msec pulses are synchronously output if the timer
4 seconds after turning the power switch to ON.
50msec pulses are periodically output in the SEARCH mode.
The REC indicator and REC/PLAY head change-over control
The *'H" level is output during REC MONITOR and REC.
The "H" level is output if the timer switch is turned
after turning the power switch to ON. The "L" level is output
tion nail of cassette tape is broken when detection of the REC PROTECT
performed.
This terminal assumes the "L" level when the head reversed
during recording on the reverse side.
Control key input terminal.
Key input is assumed at the "L" level.
The PAO terminal is jointly used for the input of the mute and DRPS (memory)
Scanaplay key input processing is assumed when both the PB2 and PB3 terminals
assumed the "L" level.
GND (earth)
LC for clock oscillation is externall
attached.
— 26 —
into the main routine after 4
mode, the "H" level is
and after I second in the
of the
the "L" level even if output of
state through DRPS, etc. to
level is assumed when
level is output in the PAUSE
AUTO REC MUTE and in
mode.
level is output while the reel
mode.
switch is turned to ON for
output terminal.
to REC/PLAY for 4 seconds
when the REC preven-
switch is
toward the forward side
keys.