Technics RS-TR474

RS-TR474 |
Mi TERMINAL FUNCTION OF IC
° 10701 (M38123M4101F): MICROCOMPUTER
*
To
check
the
contents
of
the
item
“3X”
in
the
IC
terminal
table,
set
the
unit
to
the
state
described
in
the
“Motor
Control
PCB
Checking
Method”
on
page
22.
Ho
, :
Rene
Connector
1
AD2D2
t
CN2A © pin
i _ a
CN802 © pin
3 | METER-R Rch indication level input | Connector
; P CN3 @ pin
bh bed : Connector
a
METER-L
1
Lch
indication
level
input
CN3
©
pin
, P Normal: “H” (=4.8V)
|
sae
ae
:
‘a
ies
ee
i
=
weal
POWER
0
Power
control
output
ON:
Connector
Power
ON:
“H”
(=5V)
“H",
OFF:
“L”
CN3
@
pin
Power
OFF:
“L”
(=0V)
: Normal: “L” (=0V)
MODEL
is
Model
selector
terminal
_
|
10701
©
pin
The
deck
malfunctions
when
set
to
“H”.
TPS mode
No program: “H” (=5V)
Programs: “L” (=0V)
No tape load: Approx. 4.1V
Normal tape with tab: Approx. 2.3V
Deck 2 Mechanism switch
(MODE, RINH, HALF) input
No tape load: Approx. 4.1V
Normal tape with tab: Approx. OV
Chrome tape with tab: Approx. 1.1V
Metal tape with tab: Approx. 1.7V
Deck 2 Mechanism switch
(FINH, CrO., Metal,
OPEN/CLOSE) input
Connector
CN2 © pin
OV with no signal and 1V with OVU (—20dB)
input in the REC or PAUSE mode. The voltage
varies from 0 to 5V for different input levels.
TPS signal det. input ON: Connector
CN3B ® pin
“L” (=0V) when sound is being producedin the
play or REC mode and “H” (=2.5~5V) when no
sound is produced in the stop of FF/REW mode.
Connector
CN3 @ pin
Line out mute signal output
ON: “L”, OFF: “H”
Connector
CN704 © pin
CN704 © pin
E2PROM chip select signal
ON: “H”, OFF “L”
(ex...For t REV PLAY
i IMSL Atos sere is changed)
5V Waveform appears in
0 JILL response to 11 above.
(ex...For + REV PLAY
5V mode is changed)
0
ATL
MIL.
Waveform
appears
in
response to 11 above.
14
PBADJ
Playback
adj.
output
ON:
Connector
Used
for
adjustment
at
factory
but
in
the
“H”,
OFF:
“L”
CN3
®
pin
finished
product.
Remains
at
“L”
(=0V).
Generated
signals
at
approx.
400Hz,
10kHz
and
15
osc
3kHz
(Square
wave
(H
and
L,
0
and
5V)
in
REC
16
STB
Strobe
(load)
output
for
the
Connector
DA
converter
(IC151)
CN3
©
pin
mode during adjustment of ATC).
Used to load output for the DA converter (IC 151).
Remocon signal input ON: 2701
bite | ats OFF cl
Connector
CN704 © pin
CN704 @ pin
E2PROM serial clock output
ON: “L”, OFF: “H”
E2PROM serial data
input/output
Connector -
CN704 © pin
Connector
CN3 © pin
Audio signal for adjustment
output
H and L pulse waveform appears on the input of
a remote control signal.