Telestar 2003 free download

File name Telestar DVD Serwis Man..pdf

DVD SERVICE MANUAL DVD Service Manual 2 DVD Service Manual CONTENTS PAGE 1. Power Supply 2. Scart 3. Block Diagram (Cable Connections) 4. Functional Descriptions DVD Mainboard Front Panel Front Panel Interface DVD Driver Connections 5. Description of the Integrated Circuits 6. Fault Tracing Flow Chart 7.Component List 8. DVD Front PCB 4 5 6 7 7 8 9 11 12 13 19 22 27 3 DVD Service Manual 1. POWER SUPPLY 4 DVD Service Manual 2. SCART 5 DVD Service Manual 2. BLOCK DIAGRAM (CABLE CONNECTIONS) 6 DVD Service Manual 3. FUNCTIONAL DESCRIPTIONS 3.1 DVD Mainboard DRIVE I/F FPANEL I/F RS-232 ROM LSB RAM LSB C161 MICRO I2C SERIAL EPROM ROM MSB RAM MSB Comp µC BUS 16 8 Cntr/LFE Rear L/R Rear L/R MIC mono 8 YUV SYNCS VIDEO ENCODER SVideo SDRAM 0 AUD2 SDRAM 1 ZORAN ZR 36710TQC AUD1 AUD0 AUDIN 6CHANNEL AUDIO CODEC 2CHANNEL AUDIO CODEC DVD-DSP I/F CD-DSP I/F SPDIF This board implements the back-end circuitry of a DVD player. It is composed of the following subsystems: l Microcontroller which does main control to all other sub-blocks of the system including user interface, driver interface, audio/video output. l Vaddis A/V Decoder IC decodes the bitstream coming from the DVD front-end drive, and optionally performs audio and video effects. l Audio Codec l Video Encoder The board receive +5V and +12V from the power supply. The +5V is used to power all board logic. The +3.3V for the Vaddis and SDRAMs is generated with an on-board linear regulator from the +5V. The +12V, which can be optionally reduced to +9V, is used only to supply power to the drive unit. 7 DVD Service Manual 3.2 Front Panel The front panel I/O is controlled by the BU2872AK and PT 6312LQ (Optional) driver. 8 DVD Service Manual 3.2.1 Front Panel Interface 6-Pin, Data Connector Pin Assignments PIN 1 2 3 4 5 6 NAME FPDIN IRIRQ# FPSEL FPCLK FPDOUT GND DIRECTION I I O O O DESCRIPTION Front Panel Data input IR sensor interrupt Front Panel chip select Front Panel clock Front Panel Data output 7 Pin, Power Connector Pin Assignments PIN 1 2 3 4 5 6 NAME -25 V -F1 +F2 GND GND D5V FROM SMPS SMPS SMPS SMPS SMPS SMPS DESCRIPTION Segment and grid Voltage of the VFD provide a DC supply to the cathode. To overcome the voltage difference between one and the other of the cathode, Supplies IR and Front IC There are 3 different devices operated by the BU2872 and PT6312LQ (Optional): l Vacuum Fluorescent Display (VFD) l Push-buttons l LEDs There is an option for a tray lamp and a joystick which is not currently assembled. The VFD display is custom made, implemented in a 7 grids by 15 segment matrix. The VFD needs special voltage supply for operation: l Vkk which is -25v needed to drive the segments and grids of the VFD. l Vf1, Vf2 which powers the electron cloud filament (cathode) with a differential voltage of 4.3v. This is a floating voltage difference generated by the power supply, and is biased to -20v in the front panel board by a Zener circuit from the -25v (Vkk) supply.