Sony HCD-GX750 - System Components, Service Manual

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HCD-GX750/RG551/RX550
Pin No. Pin Name I/O Pin Description
51 FILO O Master PLL (slave=digital PLL) filter signal output
52 FILI I Master PLL filter signal input
53 PCO O Master PLL charge pump signal output
54 AVDD5 — Analog power supply pin (+3.3 V)
55 DDVROUT O DC/DC converter signal output
56 DDVRSEN I DC/DC converter output voltage monitor pin
57 AVSS5 — Analog ground pin
58 DDCR I DC/DC converter reset pin
59 NC — Not used. (Open)
60 BCKI I D/A interface bit clock signal input
61 PCMDI I D/A interface serial data signal input (2’s COMP, MSB first)
62 LRCKI I D/A interface LR clock signal input
63 LRCK O D/A interface LR clock signal output f=Fs
64 VSS — Internal digital ground pin
65 PCMD O D/A interface serial data signal output (2’s COMP, MSB first)
66 BCK O D/A interface bit clock signal output
67 VDD — Internal digital power supply pin (+3.3 V)
68 EMPH O High when the playback disc has emphasis, low it has not
69 EMPHI I High when de-emphasis is ON, low when input OFF
70 IOVDD2 — I/O digital power supply pin (+3.3 V)
71 DOUT O Digital signal output
72 TEST I Test pin Normally ground
73 TES1 I Test pin Normally ground
74 IOVSS2 — I/O digital ground pin
75 NC — Not used. (Open)
76 XVSS — Master clock ground pin
77 XTAO O Crystal oscillation circuit signal output (16.9 MHz)
78 XTAI I Crystal oscillation circuit signal input (16.9 MHz)
79 XVDD — Master clock power supply pin (+3.3 V)
80 AVDD1 — Analog power supply pin (+3.3 V)
81 AOUT1 O Lch analog signal output
82 VREFL O Lch reference voltage signal output
83 AVSS1 — Analog ground pin
84 AVSS2 — Analog ground pin
85 VREFR O Rch reference voltage signal output
86 AOUT2 O Rch analog signal output
87 AVDD2 — Analog power supply pin (+3.3 V)
88 NC — Not used. (Open)
89 IOVDD0 — I/O digital power supply pin (+3.3 V)
90 RMUT O Rch “0” detection flag Not used in this set. (Open)
91 LMUT O Lch “0” detection flag Not used in this set. (Open)
92 NC — Not used. (Open)
93 XTSL I Crystal selection input Not used in this set. (Connect to ground.)
94 IOVSS0 — I/O digital ground pin
95 XTACN I
Oscillation circuit control signal input
Self-oscillation when high, oscillation stop when low
96 SQSO O
Subcode Q 80-bit and PCM peak and level data signal output
CD TEXT data signal output Not used in this set. (Open)
97 SQCK I SQSO readout clock signal input
98 SBSO O Subcode P to W serial signal output Not used in this set. (Open)
99 EXCK I SBSO readout clock signal input Not used in this set. (Open)
100 XRST I System reset signal input “L”: Reset
101 SYSM I Mute signal input “H”: Mute Connect to ground in this set.