Read Sony SRF-R405 Service Manual online
— 13 —
Pin No.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
I/O
O
O
O
–
O
O
I
I
–
O
O
–
–
I
Description
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Not used (Open)
Segment signal output to LCD
Segment signal output to LCD
Low power voltage detection input. “L”: 1.9 V or less (Entering the clock mode)
Hold switch (S401) input detection terminal “L”: hold
Not used (Open)
Beep sound signal output
Noise filter circuit control signal output
Not used (Open)
Detection input (High level)
2 band/3 band detection input
Pin Name
LCD10
LCD11
LCD12
NC
LCD13
LCD14
VDET1
HOLD
NC
BEEP
NOISE CUT
LCD STB
CLK
DATA IN
• IC BLOCK DIAGRAMS
IC503 S-80819ANNP
IC505 S-80821ANNP
IC505 S-80821ANNP
3
1
2
NC
OUT
VDD
VREF
+
–
4
Vss
IC201 CXA1111N
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
FM.IF
DISCRI
TUNING
METER
RIPPLE
FILTER
AM.IF
DET.AGC
BAND SIGNAL
OUTPUT CIRCUIT
REGULATOR
FM.FE
AM.FE
BAND
AM IF
FM IF
TUNE
EARTH
IF
AFCW
AFCJ
DET
FILTER
VCC
MUTE
MIX OUT
EARTH
FM IN
NC
AM RF
FM RF
REG
FM OSC
AFC
AM OSC
DISCRI
EARTH
KR0
(
!¡ pin)
KR1
(
!£ pin)
KR2
(
!¢ pin)
KR3
(
!∞ pin)
KS0(
7 pin)
S502
1
S503
4
S504
2
S505
3
KS1(
8 pin)
S506
POWER
S507
NOISE CUT
–––––
S508
SETTING
KS2(
9 pin)
S509-1
ENT/BAND
S509-2
(JOG SW–)
–––––
S509-3
(JOG SW+)
KS3(
0 pin)
S510
5
–––––
S511
6
S512
7
*1
Key Matrix
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