VESTEL DVD5500, Service Manual

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BLANK# Inout 4MA,SR,SMT 175 Video blank area, active low/ Videoin field_601
VSYN Inout,4MA,SR,SMT 176 Vertical Sync/Videoin Vsync_601
YUV7 Inout 4MA,SR,SMT 177 Video data output bit 7/Videoin Data PortB 3
HSYN Inout 4MA,SR,SMT 179 Horizontal sync/ Vido in Hsync_601
SPMCLK Input 180 Audio DAC master clock of SPDIF input/Videoin Data PortB 4
SPDATA Input 181 Audio data of SPDIF input/Vidoin Data PortB 5
SPLRCK Input 183 Audio L/R channel clock of SPDIF input/Videoin Data PortB 6
SPBCK Input 184 Audio bit clock of SPDIF input/Videoin Data PortB 7
XTALO Output 186 Crystal Output
XTALI Input 187 Crystal Input
PRST Input PD,SMT 188 Power on reset input, active high
VFO13 Output 190 The 1st,3rd header VFO pulse output
IDGATE Output 191 Header detect signal output
UDGATE Output 193 DVD_RAM recording data gate signal output
WOBSI Input 194 Wobble signal input
SDATA Output 195 RF serial data output
SDEN Output 196 RF serial data latch enable
SLCK Output 197 RF serial clock output
BDO Input 198 Flag of defect data input status
ADCVSS Ground 199 Ground pin for ADC circuitry
ADIN Analog Input 200 General A/D input
RFSUBI Analog Input 201 RF subtraction signal input terminal
TEZISLV Analog Input 202 Tracking error zero crossing low pass input
TEI Analog Input 203 Tracking error input
CSO Analog Input 204 Central servo input
FEI Analog Input 205 Focus error input
RFLEVEL Analog Input 206 Sub beam add input or RFRP low pass input
RFRP_DC A Input 207 RF ripple detect input
RFRP_AC Analog Input 208 RF ripple detect input(through AC coupling)
HRFZC Analog Input 209 High frequency RF ripple zero crossing
PWMVREF A Input 210 A reference voltage input for PWM circuitry. Atypical value of 4.0 v
PWM2VREF A Input 211 A reference voltage input for PWM circuitry. Atypical value of 2.0 v
ADCVDD3 Power 212 3.3 power pin for ADC circuitry
RFDTSLVP Analog Output 213 Positive RF data slicer level output
RFDTSLVN Analaog Output 214 Negative RF data slicer level output
RFIN Analog Input 215 Negative input of RF differential signal
RFIP Analog Input 216 Positive input of RF differential signal
2.1 SYSTEM BLOCK DIAGRAM
A sample system block diagram for the MT1379 DVD player board design is shown in the
following figure: