Nakamichi DVD-15, Service Manual

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Pin No. Port Name I/O FUNCTION
57 OFTRIN I OFTR AMP input pin.
58 BDO O BDO (black drop out) AMP output pin.
59 CBDO --- BDO (black drop out) AMP filtering capacitor connecting pin.
60 BDOV1 --- BDO (black drop out) AMP connecting pin.
61 BDOIN I BDO (black drop out) AMP input pin.
62 ARF O AGC (automatic gain control) AMP output pin.
63 CAGC --- AGC (automatic gain control) loop setting capacitor connecting pin.
64 AGCREF --- Reference current setting resistor connecting pin.
65 RFI2 I AGC (automatic gain control) AMP input pin.
66 SP_P I Spare amplifier positive input pin.
67 SP_N I Spare amplifier negative input pin.
68 SP_O O Spare amplifier output pin.
69 RFENV O RF envelope output pin.
70 BOTTOM --- Bottom hold capacitor connecting pin.
71 PEAK --- Peak hold capacitor connecting pin.
72 RFI3 I RF envelope input pin.
73 PDVD1 I DVD tracking phase difference input pin 1.
74 PCD1 I CD tracking phase difference input pin 1.
75 PDVD2 l DVD tracking phase difference input pin 2.
76 PCD2 I CD tracking phase difference input pin 2.
77 RFO2 O RF phase difference output pin 2.
78 RFO1 O RF phase difference output pin 1.
80 RFAS3 O RF full addition AMP output pin.
81 RE1 I RF full addition AMP input pin 1.
82 RF2 I RF full addition AMP input pin 2.
83 RFAS1 O RF full addition AMP output pin 1.
84 RFAS2 O RF full addition AMP output pin 2.
85-88 VIN5-VIN8 I External PD input pins.
89-92 VIN1-VIN4 l Internal PD input pins.
93-100 VCD1-VCD8 --- Phase delay capacitor connecting pins.
CYC11AP000 (DVD Pre-AMP) - IC100 on DVD Main P.C.B. Ass’y
IC BLOCK DIAGRAMS