NAD C715, Руководство по обслуживанию

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Pin
No.
Pin name I/O Description Remark
75 PVSS3 —
3.3 V grounding pin dedicated to the PLL
circuit.
—
76 SLCO
O
3AI/F
EFM slice level output pin.
For both analog and digital slice modes,
the output impedance
#
2.5 k
:
.
A capacitor to be
connected is selected
according to the servo
operation band.
77 RFI
I
3AI/F
RF signal input pin.
The input resistance can be selected, using
a command.
Zin: 20k
:
, 10k
:
, 5k
:
78 RFRPI
I
3AI/F
RF ripple signal input pin. —
79 RFEQO
O
3AI/F
RF equalizer circuit output pin.
To be connected to the
RFRPI via 0.1 uF and to
the RFI via 4700 pF or
higher.
80 RESIN
I
3AI/F
Pin for connecting a reference current
generating resistance.
To be connected to 22 k
:
and 680 pF in parallel.
81 VRO
O
3AI/F
1.65 V reference voltage output pin.
Connected to the V
REF
and PV
REF
within the IC.
To be connected to 0.1 uF
and 100 uF.
82 VMDIR —
Reference voltage output pin for the APC
circuit. To be connected to 0.1
uF.
83 TESTR
O
3AI/F
LPF pin for RFEQO offset correction.
To be connected to
0.015 uF or higher.
84 INVSEL
I
3AI/F
Test pin, usually fixed at "L". —
85 AGCI
I
3AI/F
Pin for RF signal amplitude adjustment
amp input.
—
86 RFDCI
I
3AI/F
RF signal peak detection input pin. —
87 RFO
O
3AI/F
RF signal generation amp output pin.
To be connected directly
to the RFDCI.
To be connected to the
AGCI via 0.1 uF.
88 PNSEL
I
3AI/F
Test pin, usually fixed at "H".
89 EQSET
O
3AI/F
External connection pin for the RF signal
equalizer. To be kept open when the
RFEQ is used.
90 RVDD3 —
3.3V Supply voltage pin for the RFamp core
section
—
91 LDO
O
3AI/F
Laser diode amp output pin.
92 MDI
I
3AI/F
Monitor photodiode amp input pin. Reference to 178 mV (typ.)
93 RVSS3 —
3.3 V grounding pin for the RF amp core
section.
—
2
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