Sony CDX-4250 Service Manual page 3

Pin No. Pin Name
54 ILL-ON
55 C.ALARM
56 NC
57 NC
58 LCD-CE
59 EZ-SEL
60 SENS
61 FOK
62 LD-ON
63 NC
64 [IN] ST/MONO
[OUT] MONO
65 LCD-CKO
66 LCD-So
67 INH
68 SQ-CKo
69 CD-RST
70 SQ-SI
71 CD-SO
72 CD-LAT
73 CD-CKO
74 VREF
75 GND1
76 X-OUT
77 X-IN
78 BU-IN
79 VDD1
80 RESET
I/O
O Illumination output
I Caution alarm select input (Used/Not used)
I Not used (Connect to ground)
— Fixed at "H" in this set.
O LCD drive chip select output
I SHIFT + input
I Information input from servo IC.
I Focus OK input
O Laser diode control
— Not used. (Connect to ground)
I/O Used for both STEREO indicator display input and force MONO output. (FM)
O LCD driver serial clock output
O LCD driver serial data output
O INHbit output
O Q data read serial clock output
O Servo IC/DAC reset output
I Q data input
O Serial data output to servo IC.
O Data latch output to servo IC.
O Serial clock output to servo IC.
— Not used.
— Ground
— Crystal oscillator connection (4.5 MHz)
I Crystal oscillator connection (4.5 MHz)
I Back-up detection
— Power supply (+5 V)
I RESET input
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Pin Description