Sony MDX-C7900, Service Manual

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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
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)