Prology DVD-400, Service Manual

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D1870 PIN ASSIGNMENTS
Pin Numbers Pin NAME Type Description
RG data PLL interface
11 PLLVDD Power Power for data PLL and related analog circuitry.
10 JITFN Analog Input The negative input terminal of operation amplifier for RF jitter meter.
9 JITFO Analog Output The output terminal of RF jitter meter.
8 PDO Analog Output
Phase comparator output. Output the phase difference of EFM and Pck4m.
Sink or sour ce a constant c urrent to loop filt er over this pin w hen phase
difference occurs. Otherwise, this pin is high impedance.
7 IREF Analog Input
Current reference input. It generates reference current for data PLL.
Connect an external 15K resistor to this pin and PLLVSS.
6 LPFN Analog Input The negative input terminal of loop filter amplifier.
5 LPFO Analog Output The output of loop filter amplifier.
4 LPIN Analog Input The input of the low pass filter.
3 LPIO Analog Output The output of the low pass filter.
2 PLLVSS Ground Ground pin for data PLL and related analog circuitry.
1 VBDPLL Analog Output Reference voltage.
176 RFIN Analog Input The negative input terminal of RF differential signal.
175 RFIP Analog Input The positive input terminal of RF differential signal.
174 RFDSLV Analog Output RF data slicer level output.
173 SCO Analog Output Analog slicer current output.
Signal Amplifier Interface
172 ADCVDD Power Power pin for ADC circuitry.
171 HRFZC Analog Input High frequency RF ripple zero crossing input or photo interrupt pulse input.
170 RFRPSLV Analog Output RF ripple slice level output.
169 RFP Analog Input RF ripple detect input.
168 RFLEVEL Analog Input Sub beam add input or RF level input.
167 FEI Analog Input Focus error input.
166 TEI Analog Input Tracking error input.
165 TEZU Analog Input Tracking error zero crossing input.
164 TEZISLV Analog Input Tracking error zero crossing low pass input.
163 ADIN Analog Input General A/D input.
162 ADCVSS Ground Ground pin for ADC circuitry.
Motor and Actuator Drive Interface
161 PDMVSS Ground Ground for PDM Circuitry.
160 PWM2VREF Analog Input A refer ence voltage input for PWM circuitry. The typical value is 4.0V.
159 PWMVREF Analog Input A reference voltage input for PWM circuitry. The typical value is 2.0V.
158 PDMVDD Power Power for PDM circuitry.
12 FOO Analog Output Focus servo output. PDM output of focus servo compensator.
13 TRO Analog Output Tracking servo output. PDM output of tracking servo compensator.
14 PWMOUT1 Analog Output
1 st General multi-level PW M output. Th e number of output lev els is set
with DSP command. It is used to control step motor.
15 PWMOUT2 Analog Output
2 nd Gener al multi -level PW M output. Th e number of ou tput level is
selected DSP command.
17 DMO Analog Output Disk motor control output. PWM output.
18 FMO Analog Output
Disk motor control. 3-level PWM output. It is used only f or DC motor, but it
is corporate with the pin PWMOUT1 to control step motor. If the internal
DC_FMO is positive, the FMO output lags 90 than PWMOUT1, otherwise
the FMO output leads 90 than PWMOUT1.
19
FROPENPW
M
Analog Output
Tray open control output.
It generates PWM output for TRWMEN
27hRW2
=0 or digital out put for
TRWMEN
27hRW2
=0.
20 FG
TTL Schmitt
Input 50K pull up
Motor Hall sensor input.
22 TRCLOSE TTL Output
Tray close output.
It provides a clock out to the micro controller.
23 ENDM TTL Output Enable/disable disk motor. A logical high enables disk motor.
Panel Interface
8
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