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Technics SL-P3 Service Manual page 26

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m@ TERMINAL FUNCTION OF MICRO COMPUTER
(MN1402PCT)
Name
/O
Name
1/0
of pin
Devision
of pin
Devision
[ve [—— [ome
CS
TES ee
Test mode for clock frequency
17
adjustment
3
cos
e@
Pull up input terminals BI2 and
BI3 to VDD (5V) and reset them.
outout in duty 1:
7.
co7
Volume down control of remote
control
(effective at ''H")
cos
Volume up control of remote control
(effective at
''H")
Not used
Remote control signai reception
display LED output
.
:
;
"L' output when signal is
EC
received by remote control
input
Remote control signal receiving
terminal
@
Data code shown below is received.
terminal (SNS1).
re
Clock frequency (600kHz) input
terminal.
e Remote control transmitter data code (MN6030).
Custom code
Data code
Inverse custom code
Inverse data code
Head pulse
(5 bit)
(6 bit)
(5 bit)
(6 bit)
1
10000000
1
1001
1
1
1
1
1
8T | 8T
Function
Data output
e
"H" output in timing of key scan
input (AIO ~3, BIO ~3, SNSO).
Key scan strobe
oT
6T
150T
90T
*1T = 0.420ms~0.424ms (U.S.A. and Canada)
1T = 0.454ms~0.460ms (Europe and Others)
Data Code
| tt
oooo10 ff ctear
10100 _|
| 2
100010 _|
| 3
oro010 || repeat
| 111000 |
| - 4
| ttoot0 |] Mscan | 111100 |
| sotto ff recan | 100100 |
| 6
t01010 | 4 search [01000 _|
| 7
on to10 |
| 8
ttt010 fh
| 8
00710 |
aa
ee
| _memory
8T
Data 1
Data O
rII_pevse [011000
memary
[010101 || play _p | 010700
[Volume
Bows | 101001 Votuime Up | 001001
SL-P3
SL-P3
m SCHEMATIC
DIAGRAM (A) (Remote control circuit)
1
2
R800
|C800
I5OK
Cc
=
2
oO
2
=
8
D
3
£
Pat
4
3
ms)
5
B
E
2
a
oO
2
'=
E
MAI54WK
D6,7
MAIS4WA
F
02,3
MAIS4WA
Note:
1. The
voltage
value
is the
standards
of this unit
measured
by
DC
electronic
voltmeter
(high
impedance).
2. The waveform
are those
generated
during
signal
transmission.
(''play'' button depressed for signal
transmission.)
3
D636
0.8]
DETECTION
eles
SIGNAL
AMP
C807
50V
0.22
ny
rol: 1OOP (USA.and.Canada)
| Cl: 470P (Other Areas)
1 C2: |OOP (USA and Canada)
i C2: 120P (Other Areas)
3. This
schematic
diagram
may
be modified
at any
time with the development of new technology.
4.—:
+B voltage line.

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