Read Sony CDX-L550 / CDX-L550V / CDX-L550X Service Manual online
14
CDX-L550/L550V/L550X
Pin No.
Pin Name
I/O
Pin Description
53
CD RST
O
Reset signal output for CD servo IC.
54
A0
O
Command/parameter discrimination signal output for CD servo IC.
55
STB
O
Data strobe signal output for CD servo IC.
56
X EN
O
Crystal oscillation control output for CD servo IC.
57
LIMIT
I
CD mechanism deck Limit switch detection input
58
PH1
I
CD mechanism deck PH1 detection input (Not used in this set)
59
D SW
I
CD mechanism deck Down switch detection input
60
INSW
I
CD mechanism deck Disc in switch detection input
61
NC (PH3)
O
CD mechanism deck PH3 detection input (Not used in this set)
62
CD LM LO
O
CD mechanism deck loading motor control output (Loading direction)
63
CD LM EJ
O
CD mechanism deck loading motor control output (Eject direction)
64, 65
NCO
O
Not used. (Open)
66
AMPATT
O
Power amplifier attenuator control output
67
AMPON
O
Power amplifier standby control output
68
CDMD ON
O
CD mechanism deck power supply control output
69
ATT
O
System attenuator control output
70
VOLATT
O
Electric volume attenuator control output
71 – 75
NCO
O
Not used. (Open)
76
COLSW
I
Key illumination 1 color/2 color select initial setting input
(L: 1 COLOR, H: 2 COLOR) (Fixed at L: CDX-L550, H: CDX-L550V/L550X)
77
COLSEL
I
1 color initial setting input (L: amber, H: green) (Fixed at L in this set)
78
DIMSEL
I
Manual dimmer initial setting input (L: dimmer without, H: dimmer with)
(Fixed at L: CDX-L550/L550X, H: CDX-L550V)
79
XCD ON
O
CD signal processing crystal drive output
80
NCO
O
Not used. (Fixed at L in this set)
81 – 85
NCO
O
Not used. (Open)
86
E2P SIO
I/O
EEPROM serial data input/output
87
E2P CKO
O
EEPROM serial clock output
88
NCO
O
Not used. (Open)
89
FLASH W
I
Flash microcomputer write detection input
90
NS MASK
O
Noise mask output
91
AD ON
O
Key power supply control output
92
DOORIND
O
Sub panel power control output
93
ILLON
O
Illumination power control output
94
DOORSW
I
Front panel OPEN/CLOSE detection input
95
DAVSS
—
D/A converter power supply (–) pin
96, 97
REIN1, 0
I
Rotary encoder input 1, 0
98
RCIN1
I
Rotary commander SHIFT key input
99
RAMBU
I
Not used. (Fixed at L in this set)
100
DAVDD
—
D/A converter power supply (+) pin (+5 V)
Click on the first or last page to see other CDX-L550 / CDX-L550V / CDX-L550X service manuals if exist.