Sony MDX-C670 Service Manual page 45

Pin No. Pin Name
41 NCO
42 PW SEL
43 RCIN1
44 TEST
45 AMPMUTE
46 BEEP
47 MUTE
48 VOLCE
49 VOLSO
50 VOLCKO
51 PLLSI
52 PLLCKO
53 PLLSO
54 PLLCE
55 SD IN
56 ST
57 DIMMER
58 AD ON
59 RAMBU
60 RESET
61 SIRCS
62 BUIN
63 DOORSW
64 ACCIN
65 NOSESW
66 TELMUTE
67 KEYACK
68 VDD
69 X OUT
70 X IN
71 GND
72 XT OUT
73 XT IN
74 AVDD
75 AVREF
76 KEYIN0
77 KEYIN1
78 KEYSEL
79 VSM
80 DSEL0
I/O
O Not used (open)
I Power select initial setting
I Input of rotary commander
O Not used (open)
O Power AMP mute control
O Output of buzzer control
O Output of system mute control
O Output of electronic volume serial chip enable
O Output of electronic volume serial data
O Output of electronic volume serial clock
I Input of PLL serial data
O Output of PLL serial clock
O Output of PLL serial data
O Output of PLL serial chip enable
I Input of station detector detection
I/O In FM mode, stereo input, monaural output
O Output of dimmer control
O Output of A/D converter ON control
I Input of RAM reset detection
I Input of RESET "L": RESET
I Input of remote controller
I Input of backup power detection
I Not used (connected to the GND)
I Input of accessory power detection
I Input of front panel remove/attach detection.
I Input of telephone mute detection
I Key input acknowledge signal
– Power supply
O Output of main ceramic oscillator (5 MHz)
I Input of main ceramic oscillator (5 MHz)
– Ground
O Output of sub crystal oscillator (32.768 kHz)
I Input of sub crystal oscillator (32.768 kHz)
– Power supply for A/D converter
– Reference voltage power supply for A/D converter
I
Key input
I
I Function select pin
I A/D input of signal meter common to FM and AM
I A/D input of initial setting for the destination
– 14 –
Function
"H": SD detected
"H": Mute ON