Read Sony CDX-F5500N Service Manual online
16
CDX-F5500N
• IC500 MN101E01JRK (SYSTEM CONTROL) (MAIN BOARD (2/2))
Pin No.
Pin Name
I/O
Pin Description
1
DAVDD
—
D/A converter power supply (+) pin (+3.3 V)
2
NCO
O
Not used. (Open)
3
DAVSS
—
D/A converter power supply (–) pin
4
UNISO
O
SONY-BUS data output
5
UNISI
I
SONY-BUS data input
6
UNICKO
O
SONY-BUS clock output
7
RETRA_SW
I
Not used. (Open)
8, 9
NCO
O
Not used. (Open)
10
VDD1
—
Power supply pin (+3.3 V)
11
MMOD
I
Not used. (Fixed at L in this set)
12
OSCOUT
O
Main clock output (27.648 MHz)
13
OSCIN
I
Main clock input (27.648 MHz)
14
VSS1
—
Ground
15
XIN
I
Sub clock input (32.768 kHz)
16
XOUT
O
Sub clock output (32.768 kHz)
17
VDD2
—
Power supply pin (+3.3 V)
18
MOD1
—
Not used. (Fixed at H in this set)
19
RESET
I
Microcomputer reset input
20
RCIN1
I
Rotary commander SHIFT key input
21
ACCIN
I
Accessory power supply detection input
22
TESTIN
I
Test mode detection input
23
TELATT
I
Telephone attenuator detection input
24
ATT
O
Audio mute control output
25
ADON
O
A/D converter power supply control output
26
NCO
O
Not used. (Open)
27
KEYACK
I
Key acknowledge detection input
28
TUATTIN
I
Mute zero cross detection input from tuner unit.
29
CDON
I
Servo power supply control input from CD system control IC.
30
CDMON
I
Loading 6V power supply control input from CD system control IC.
31
BUIN
I
Backup power supply detection input
32 to 35
NCO
O
Not used. (Open)
36
BUSON
O
BUS ON output to CD system control IC.
37
SYSRST
O
System reset output to CD system control IC.
38 to 41
NCO
O
Not used. (Open)
42
Z_MUTE
I
Mute zero cross detection input from CD system control IC.
43 to 49
NCO
O
Not used. (Open)
50
BBESEL
I
Fixed at H in this set.
51
NCO
O
Not used. (Open)
52
AREASEL1
I
Destination area initial setting input (Fixed at H in this set)
53
AREASEL0
I
Destination area initial setting input (L: 10K, H: 9K)
54 to 56
NCO
O
Not used. (Open)
57
EJECT_OK_SW
O
Not used. (Open)
58
PANELSW
I
Front panel detach detection input (L: with front panel, H: without front panel)
59
DIAG
I
Mode input from power amp IC.
60
VOLATT
O
Attenuator control output to electronic volume IC.
61
NOSESW
O
Nose detection output
62
NCO
O
Not used. (Open)
63
VSS2
—
Ground
64
TUATT
O
Tuner mute control output
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