Akai DV R3300SS Service Manual page 41

U16 ZR36732PQC PINS DESCRIPTION - CONTINUED
Pin No. Pin Name Type
132 GNDP-A2 Digital ground of filtered 3.3V supply for AMCLK.
130 VDDP-A2 3.3 V filtered digital power supply for AMCLK.
14,35,73 GNDC Digital ground of 1.8 V supply.
114,144
12,33,63 VDDC 1.8 V Digital power supply
116,142
123 GNDA Ground plane of infernal PLL circuit.
121 VDDA 1.8 V Power supply for internal PLL circuit.
104 VDDDAC 3.3 V Analog power supply for the DACs.
101 GNDDAC_D Grounds for the DACs 3.3V analog power supply
107 GNDDAC_B
109 GNDDAC_P
110 GNDDAC_S
U1 5703T (SP3721A) PINS DESCRIPTION
Pin No. Pin Name Type
Input Pins:
1,2 DVDRFP I RF Signal Inputs. Differential RF signal attenuator input pin.
DVDRFN
63 CDRF I RF Signal input. Single-ended RF signal attenuator input pin
59,60 AIP,AIN I AGC Amplifier Inputs. Differential AGC amplifier input pins.
53,54 DIP,DIN I Analog inputs for RF single Buffer. Differential analog inputs to the RF single-ended
output buffer and full wave rectifier.
32 FDCHG# I Low Impedance Enable. A TTL compatible input pin that activates the FDCHG switches.
A low level activates the switches and the falling edge of the internal FDCHG triggers
the fast decay for the MIRR bottom hold circuit.(open high)
49 HOLD1 I Hold Control. A TTL compatible control pin which, when pulled high, disables the RF
AGC charge pump and holds the RF AGC amplifier gain at its present value.(open high)
14-11 A,B,C,D I Photo Detector Interface Inputs. Inputs from the main beam photo detector matrix
outputs.
8-5 A2,B2,C2,D2 I photo Detector Interface Inputs. AC coupled inputs for the DPD from the main beam
photo detector matrix outputs.
16-15 E,F I CD tracking Error Inputs. Inputs from the CD photo detector error outputs.
3-4 PD1,PD2 I CD photodetector interface inputs. From the CD photo detector error outputs.
40 MEI I Mirror Envelope Input.The SIGO envelope input pin.
35 MIN I RF signal input for Mirror.AC coupled inputs for the mirror detection circuit from,the
pull-in signal output.(PI)
21 DVDPD I APC Input. DVD APC input pin from the monitor photo diode.
23 CDPD I APC Input. CD APC input pin from the monitor photo diode.
25 LDON# I APC Output On/Off. APC output control pin. A low level activates the LD output.
(open high)
Output Pins:
62,61 ATOP/ATON O Differential Attenuator Output.Attenuator outputs.
52,51 FNP,FNN O Differential Normal Output.Filter normal outputs.
57 SIGO O Single Ended Normal Output.Single-ended RF output.
64 CDRFDC O CD RF Signal Output.Single ended CD RF summing output.
42 FE O Focusing Error Signal Output. Focus error output-reference to VCI.
41 TE O Tracking Error Signal Output. Tracking error output reference to VCI.
43 CE O Center Error Signal Output. Center error output reference to VCI.
34 MEVO O SIGO Bottom Envelope Output.Bottom envelope for Mirror detection.
Description
Description
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U1 5703T (SP3721A) PINS DESCRIPTION - CONTINUED
Pin No. Pin Name Type
37 DFT O Defect Output. Pseudo CMOS output.When a defect is detected,the DFT output goes
high.Also the servo AGC output can be monitored at this pin,when CAR bits 7-4 are
'0011'.
29 MIRR O Mirror Detect Output. Mirror Detect comparator output. Pseudo CMOS output.
36 PI O Pull-in Signal Output.The summing signal output of A,B,C,D or PD1,PD2 for mirror
detection. Reference to VCI.
22 DVDLD O APC output DVD APC output pin to control the laser power.
24 CDLD O APC output CD APC output pin to control the laser power.
Analog pins:
56 BYP I/O The RF AGC integration capacitor CBYP,is connected between BYP and VPA.
9 CP I/O Differential Phase tracking LPF pin. An external capacitance is connected between
this pin and the CN pin.
10 CN I/O Differential Phase tracking LPF pin. An extemal capacitance is connected between
this pin and the CP pin.
45 LCP - Center Error LPF Pin.An external capacitance is connected between this pin and the
LCN pin.
44 LCN - Center Error LPF Pin.An external capacitance is connected between this pin and the
LCP pin.
30 MP - MIRR signal Peak hold pin. An external capacitance is connected to between this pin
and VPB.
31 MB - MIRR signal Bottom hold pin. An external capacitance is connected to between this
pin and VPB.
39 MEV - Sigo Bottom Envelope pin. An external capacitance is connected between this pin
and VPB.
17 CDTE - CD Tracking. E-F Opamp output for feedback.
38 TPH - PI Top Hold pin. An external capacitance is connected between this pin and VPB.
26 VC - Reference Voltage output. This pin provides the internal DC bias reference voltage
(+2.5V fix). Output impedance is less than 50ohms.
27 VC1 - Reference Voltage input. DC bias voltage input for the servo input reference.
18 VC12 - Reference Voltage Input. DC bias voltage input for the servo input reference.
55 RX - reference Resistor Input. An external 8.2kohm,1% resistor is connected from this pin
to ground to establish a precise PTAT (proportional to absolute temperature)
reference current for the filter.
33 MLPF - MIRR signal LPF pin An external capacitance is connected between this pin and VPB.
19 NC - No Connect.
Serial Port Pins:
48 SDEN I Serial Data Enable. Serial Enable CMOS input.A high level input enables the serial
port.(not to be left open)
47 SDATA I/O Serial Data.Serial data bi-directional CMOS Pin. NRZ programming data for the
internal registers is applied to this input.(Not to be left open).
46 SCLK I Serial Clock Serial Clock CMOS input. The clock applied to this pin is synchronized
with the data applied to DSATA.(Not to be left open)
Power Pins:
58 VPA Power. Power supply pin for the RF block and serial port.
28 VPB Power. Power supply pin for the servo block.
50 VNA Ground. Ground pin for the RF block and serial port.
20 VNB Ground. Ground pin for the servo block.
Description
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