Sony CDX-4170R Service Manual page 23

SECTION 4
DIAGRAMS
4-1. IC PIN DESCRIPTION
• IC501 MN1886426SD (SYSTEM CONTROL)
Pin No. Pin Name I/O
1 F OK I Focus signal detection input
2 L SW I Sled limit detection switch input
3 IN SW I Disc insert detection input
4 ILLON O Illumination power control output
5 PW ON O System power control output
6 RC IN1 I Rotary commander shift input
7 VDD — Power supply (+5 V)
8 OSCIN I Ceramic oscillator connection input pin (8 MHz)
9 OSCOUT O Ceramic oscillator connection output pin (8 MHz)
10 GND — GND
11 XT IN I Sub crystal (for clock) oscillator connection input pin (32.768 kHz)
12 XT OUT O Sub crystal (for clock) oscillator connection output pin (32.768 kHz)
13 EX2 I Connect to GND.
14 RESET I Reset input ("L" : Reset)
15 CNIN, SCOR I CNIN and SCOR common port
16 BU IN I Back-up detection input
17 SENS I SENS input from CXD2507AQ.
18 VOLCE O Electric volume serial chip enable output
19 VOLSO O Electric volume serial data output
20 VOLCKO O Electric volume serial clock output
21 DBCNT1 O D-BASS level select port
22 LM EJ O Loading motor control output (Eject direction)
23 LM LOD O Loading motor control output (Loading direction)
24 CDMON O Power control output for CD mechanism deck drive.
25 CD ON/CTL1 O CD ON and CTL1 common port
26 RDSCKI I RDS-CLK input
27 PLLCKO O PLL CLK output
28 PLLSO O PLL DATA output
29 PLLCE O PLL CE output
30 SELF SW I Disc self store detection input
31 KEYAC I Key input acknowledge
32 CD RST O CD signal process IC reset output
33 CD CKO O CD signal process serial clock output
34 CD SO O CD signal process serial data output
35 CD LAT O CD signal process latch output
36 ACCIN I Accessory power detection input
37 PLLSI I PLL DATA input
38 BEEP O Buzzer control output
39 LCDCKO O LCD serial clock output
40 LCDSO O LCD serial data output
41 LCDINH O LCD blank display control output
42 LCDCE O LCD chip enable output
43 GFS I GFS signal detection input
44 SQ CKO O SUBQ clock output
45 SQ SI I SUBQ data input
46 D SW I DOWN switch detection input
Pin Description
– 24 –
Pin No. Pin Name I/O
47 VDD — Power supply (+5 V)
48 AVDD — Power supply for AD conversion input. (+5 V)
49 AVREF+ — Reference voltage input (+ side) for AD conversion input. (+5 V)
50 KEYIN1 I Key input
51 KEYIN0 I Key input
52 KEYIN2 I Key input
53 TBTGSEL I Automatic adjustment process with/without setting port
54 DSTSEL I Destination select setting port
55 RC IN0 I Rotary commander input
56 NIL I Connect to GND.
57 VSM I FM and AM common signal meter A/D conversion input
58 AVREF- — Reference voltage input (- side) for AD conversion input. (GND)
59 AVSS — GND for AD conversion input.
60 GND — GND
61 LD ON, CTL2 O LD ON and CTL2 common port
62 EMPH O O Emphasis control output
63 SEKOUT O SEEK OUT output
64 TUNON O TUNER power control output
65 FM ON O FM power control output
66 MUTE O System mute output
67 NCO — Not used.
68 AD ON O Power control output for AD conversion.
69 NOSESW I Front panel connect detection input ("L" : with front panel, "H" : without front panel)
70 ST I/O Used for both STEREO indicator display input and force MONO output. (FM)
71 SD IN I Signal detector input
72 PW SEL I Power select initial setting input
73 RDSSI I RDS-DATA input
74 TUNMUT O TUNER MUTE output
75 AMPMUT O Power amplifier mute control output
76 AMPON O Power amplifier power control output
77 TEST I Test mode setting input
78 DBCNT3 O D-BASS level select port
79 DBCNT2 O D-BASS level select port
80 INTSEL0 O CNIN and SCOR signal select control port ("H" : CNIN, "L" : SCOR)
Pin Description
– 25 –