Sony CDX-NC9950, Руководство по обслуживанию

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CDX-NC9950
• IC501 MB90F474HPFV-GE1-GREX1 (SYSTEM CONTROL) (MAIN BOARD (3/4))
Pin No. Pin Name I/O Pin Description
1 PG I Power suppl y OK detection signal input f or DC-DC con ver ter
2 FLASH P ON O
Flash write communication signal change control signal output
L: SH-3 comm unica tion, H: PC Ver. UP comm unica tion
3 BEEP O BEEP signal output Used to PPG function.
4 MOTOR ON O Motor po wer suppl y on signal output
5 MOT + O Open/close motor control signal output (+)
6 MOT – O Open/close motor control signal output (–)
7 LED ON O CD side illumination on signal output when front panel open
8 FSW IN I DC-DC con ver ter oscilla tor fr equenc y count signal input Used to input ca ptur e.
9 VSS — Ground pin
10 BOOST O Boost signal output
11 ENCSW1 I ENC switch 1 signal input
12 ENCSW2 I ENC switch 2 signal input
13 ACC OUT O Accesory out signal output
14 to 16 NCO O Not used in this set. (Open)
17 T.ROM SDA I/O Tuner EEPR OM ser ial da ta signal input/output
18 T.ROM SCK O Tuner EEPR OM ser ial c lock signal output
19, 20 NCO O Not used in this set. (Open)
21 VCC5 — Power suppl y pin (+5 V)
22 NS MASK O Tuner noise mask signal output
23 TU MUTE O Tuner m ute signal output
24 FLASHW I Flash write mode detection signal input
25 SH3SI/FLSSI I SH3 communication signal input (RXD)/Flash write data signal input
26 SH3SO/FLSSO O SH3 communication signal output (TXD)/Flash write data signal output
27 UNI AU O
BUS audio in/A UX audio in select contr ol signal output
H: SONY BUS audio, L: AUX audio
28 VOLATT O Electr onic v olume m ute signal output
29 DIAG I Condition signal input fr om power amplif ier IC
30 AMP ON O AMP STB signal output Used to contr ol of power amplif ier IC. L: Off, H: On
31 I2CCKO O Ser ial c lock signal output f or tuner and electr onic v olume IC
32 I2CSIO I/O Ser ial da ta signal input/output f or tuner and electr onic v olume IC
33 AVCC — Power suppl y pin (+3.3 V)
34 AVRH — Power suppl y pin (+3.3 V)
35 AVSS — Ground pin
36 KEYIN0 I key signal input Used to A/D port.
37 TEMP TR I Temper atur e detection signal input f or fr ont panel motor contr ol Used to A/D port.
38 FP IDET I F ront panel oper ation cur rent detection signal input Used to A/D port.
39 QUALITY (RDS) I Tuner noise detection signal input Used to A/D port.
40 VSS — Ground pin
41 RC IN0 I Rotar y commander signal input Used to A/D port.
42 VSM I S meter v oltage signal input Used to A/D port.
43, 44 NCO O Not used in this set. (Open)
45 KEY ACK I Key ac knowledge detection signal input H: On (Used to inter ruption por t.)
46 DAVN (RDS) I RDS data block synchronization detection signal input
47, 48 MD0, MD1 — Connected to po wer suppl y pin (+5 V)
49 MD2 — Connected to ground pin
50 VOICE REQ I VOICE r equest signal input
51 BU IN I Bac k up po wer suppl y detection signal input Used to inter ruption por t.
52 AMUTE IN I Audio mute signal input
53, 54 NCO O Not used in this set. (Open)
55 MUTE CON I Mute condition signal input Used to interruption port.
56 UNISI I SONY BUS ser ial da ta signal input Used to ser ial por t.