Technics SE-CH505A - Block Diagram; Function of IC Terminals

SE-CH505A SE-CH505A
@ Block Diagram
BA45580X FL6O!
fF icsu? | 6U?
FL DISPLAY
METER AMP(POWER)
From
Power transformer
3S ; é — ~~ —_—-
th 4 (7) (0618) (2); paosavo a 252268 @ |
a > * B 7 (PAI/ADI) a ta ei aay A Kans H
°
Mesa | Steve aoe le oe
15(D616) 14 — A!
ps 4 9 Voo 3 8)
o6i2 |
mating + LC65204a4879
fj frcaousn zo
FL. DRIVE
061310614) Cah ve
MUTING L.
M5218 AP
ile oO)
HEADPHONES AMP
HEADPHONES Svi3zio20
POWER AMP
Qsgl
Leh
IN
Kal
4)
#7]
|
SPEAKERS
A.
GNO
(IN)
9
|
020119202)
\
MUTING
5
Len
SURROUND
SPEAKERS
O
Ren—
[R
ch]
Q573
9571,
572
Over
lood
detoctor
M5218
AP
ch}
0352,
361,362,371!
“
CS
drive
Pizent
(9)
FAN
MOTOR
D.GND
i)
Power
(2)
=<]
ACI
2
&]
ct)
d|
0354
acz
(3)
SWITCHING
a
(OVER
LOAD
DET.)
)X|uz01
GB)
For
CEGJarea.
4
BrCl
a
7Oe
Q701,0715
:
oie.
For
CE,
EB)
Q702,0716
pogo
}
C8)
oy
C8)
Q750,0750
Regu!
ac
wi
)
rosie
Lr
|
D
\
R077
oe.
=
0705,
706
Q703,0714
Fore,
EBJareas.
[|
Reguiotor
|
¢8)
fe
forte
Evora
H
+6)
1)
(
indicates
Pin
No.
of
4
tight
channel.
)
D632
—---—-——---4
0753
€8)—{ Switching]
| “>: SouRCE SIGNAL |
> | =>: MIC SIGNAL |
L pe |
0632 063!
} To FL6OI
—21-
@ Function of IC Terminals
eiC601 (LC65204A4B79)
eel]
nic
PA1/AD1 R-ch level signal input from IC602
PA2/AD2
PA3/AD3
PBO/AD4
hie PB1/ADS
Meter range switching signal input
PB2/ADE (x1 mode: “H", X0.1 mode: “L”)
| 8 PB3/AD7 ie Power ON detection signal input
peda |
A/D converter standard voltage input
10
11 Connected to GND
12 | OSC1
VO
Operation key ON/OFF signal input
Check mode input (Mode ON: “H”)
Connected to GND
Clock signal input/output
(Connected to X501)
Power supply terminal (+5 V input)
Reset signal input
(Operation mode: “H”,
Reset mode: “L”)
FL segment drive output
(Connected to GND)
(Pulse signal output)
FL segment drive output
(Pulse signal output)
FL grid drive output
(Pulse signal output)
L pull-down power source input