Read Sony MDX-C7890R Service Manual online
– 44 –
Pin No.
Pin Name
I/O
Function
40
DVSS
—
Ground terminal (digital system)
41
XOE
O
Output enable signal output to the D-RAM (IC307) “L” active
42
XCAS
O
Column address strobe signal output to the D-RAM (IC307) “L” active
43
A09
O
Address signal output to the external D-RAM Not used (open)
44
XRAS
O
Row address strobe signal output to the D-RAM (IC307) “L” active
45
XWE
O
Write enable signal output to the D-RAM (IC307) “L” active
46
D1
I/O
47
D0
I/O
48
D2
I/O
49
D3
I/O
50
MVCI
I
Digital in PLL oscillation input from the external VCO Not used (fixed at “L”)
51
ASYO
O
Playback EFM full-swing output terminal
52
ASYI
I (A)
Playback EFM asymmetry comparator voltage input terminal
53
AVDD
—
Power supply terminal (+3.3V) (analog system)
54
BIAS
I (A)
Playback EFM asymmetry circuit constant current input terminal
55
RFI
I (A)
Playback EFM RF signal input from the CXA2523R (IC302)
56
AVSS
—
Ground terminal (analog system)
57
PDO
O (3)
Phase comparison output for clock playback analog PLL of the playback EFM Not used (open)
58
PCO
O (3)
Phase comparison output for master clock of the recording/playback EFM master PLL
59
FILI
I (A)
Filter input for master clock of the recording/playback master PLL
60
FILO
O (A)
Filter output for master clock of the recording/playback master PLL
61
CLTV
I (A)
Internal VCO control voltage input of the recording/playback master PLL
62
PEAK
I (A)
Light amount signal (RF/ABCD) peak hold input from the CXA2523R (IC302)
63
BOTM
I (A)
Light amount signal (RF/ABCD) bottom hold input from the CXA2523R (IC302)
64
ABCD
I (A)
Light amount signal (ABCD) input from the CXA2523R (IC302)
65
FE
I (A)
Focus error signal input from the CXA2523R (IC302)
66
AUX1
I (A)
Auxiliary signal (I
3
signal/temperature signal) input terminal Not used (fixed at “H”)
67
VC
I (A)
Middle point voltage (+1.65V) input from the CXA2523R (IC302)
68
ADIO
O (A)
Monitor output of the A/D converter input signal Not used (open)
69
AVDD
—
Power supply terminal (+3.3V) (analog system)
70
ADRT
I (A)
A/D converter operational range upper limit voltage input terminal (fixed at “H” in this set)
71
ADRB
I (A)
A/D converter operational range lower limit voltage input terminal (fixed at “L” in this set)
72
AVSS
—
Ground terminal (analog system)
73
SE
I (A)
Sled error signal input from the CXA2523R (IC302)
74
TE
I (A)
Tracking error signal input from the CXA2523R (IC302)
75
AUX2
I (A)
Auxiliary signal input terminal Light amount signal input from the CXA2523R (IC302)
76
DCHG
I (A)
Connected to the +3.3V power supply
77
APC
I (A)
Error signal input for the laser automatic power control Not used (fixed at “L”)
78
ADFG
I
ADIP duplex FM signal (22.05 kHz
±
1 kHz) input from the CXA2523R (IC302)
79
F0CNT
O
Filter f0 control signal output terminal Not used (open)
80
XLRF
O
Serial data latch pulse signal output terminal Not used (open)
81
CKRF
O
Serial data transfer clock signal output terminal Not used (open)
82
DTRF
O
Writing serial data output terminal Not used (open)
83
APCREF
O
Control signal output to the reference voltage generator circuit for the laser automatic power
control
control
84
LDDR
O
PWM signal output for the laser automatic power control Not used (open)
85
TRDR
O
Tracking servo drive PWM signal (–) output to the BH6511FS (IC303)
86
TFDR
O
Tracking servo drive PWM signal (+) output to the BH6511FS (IC303)
Two-way data bus with the D-RAM (IC307)
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