Sharp DV-550U Service Manual page 32

DV-550U
Pin No. Terminal name
19 TESIO0
20 P2VREF
21 SPDO
22 PDOS
23 PDO
24 TMAXS
25 TMAX
26 LPFN
27 LPFO
28 PVREF
29 VCOREF
30 VCOF
31 AVSS
32 SLCO
33 RFI
34 AVDD
35 RFCT
36 RFZI
37 RFRP
38 FEI
39 SBAD
40 TSIN
41 TEI
42 TEZI
43 FOO
44 TRO
45 VREF
46 RFGC
47 TEBC
48 FMO
49 FVO
50 DMO
51 2VREF
I/O
I Test input/output terminal. Usually fixed to "L".
– PLL system 2VREF terminal.
O VCO center frequency shift terminal.
O EFM and PLCK signal phase error signal output terminal.
(To be used when x8 speed operation is used)
O EFM and PLCK signal phase error signal output terminal.
O TMAX detection result output terminal.
To be selected with command bit TMPS.
O
TMAX detection result
Longer than specific period
Shorter than specific period
Within specified period
I Reverse input terminal for low pass filter amplifier.
O Output terminal for low pass filter amplifier.
– PLL system VREF terminal.
I VCO center frequency reference level terminal.
To be fixed usually to "PVREF".
O Filter terminal for VCO.
– Analog system ground terminal.
O Data slice level generation DAC output terminal.
I RF signal input terminal.
– Analog system power terminal.
I RFRP signal center level input terminal.
I RFRP zero cross input terminal.
I RF ripple signal input terminal.
I Focus error signal input terminal.
I Sub-beam addition signal input terminal.
I Test input terminal. To be fixed usually to "Vref"
I Tracking error signal input terminal.
(Fetching when tracking servo is ON)
I Tracking error zero cross input terminal.
O Focus equalizer output terminal.
O Tracking equalizer output terminal.
– Analog reference power terminal.
O RF amplitude adjustment control signal output terminal.
Output of 3-pole PWM signal. (PWM carrier = 88.2 kHz)
O Tracking balance control signal output terminal.
Output of 3-pole PWM signal. (PWM carrier = 88.2 kHz)
O Feed equalizer output terminal.
Output of 3-pole PWM signal. (PWM carrier = 88.2 kHz)
O Speed error signal or feed search EQ output terminal.
Output of 3-pole PWM signal. (PWM carrier = 88.2 kHz)
O Disc equalizer output terminal.
Output of 3-pole PWM signal. (PWM carrier = DSP system
88.2kHz, to be synchronized with PXO)
–
Operation function
TMAXoutput
"P2VREFF"
"VSS"
"HiZ"
12-5
Remarks