Components Description; Combo Pcb - Kenwood KDV-S210P Service Manual

COMBO PCB

Ref. No. Application / Function
MPEG decoding control
Dolby digital decoding control
LPCM audio decoding control
DVD navigation control
ATAPI communication control
Built-in microcomputer for controlling
U1
system and B/E system
Built-in video DAC
Digital audio DAC control output
Controls for keys and remote control
EEPROM for storing system setting
U2
information and resume information
Frame buffer memory
U3
Program memory
U5 3.3V regulator
U9 System reset control
U23 For audio post LPF
U27 SPDIF output, Pulse transformer driver
U28 B/E program memory
U34 Program memory
U35 Digital audio 2ch DAC
DVD/CD digital servo control
DVD/CD data decoding control
SU1
F/E section built-in system control
microcomputer
ATAPI communication control
Pickup actuator driver
SU2 Feed motor driver
Motor driver for slot loading mechanism

COMPONENTS DESCRIPTION

DVD MPEG images are decoded.
Outputs of Dolby digital audio are decoded.
LPCM audio of CD and DVD are decoded.
DVD navigation is controlled.
ATAPI communication is control in order to control F/E.
System as a whole and B/E are controlled. 32bit RISC microcomputer is built-in.
Video DAC is built-in to output current for composite video output from No. 106 pin.
Audio signals are output from No. 32 (TWS), 33 (TSD0), 39 (MCLK), and 40 (TBCK) pins. Also,
DAC system control is conducted using No. 160 (AUX0), 161 (AUX1), and 168 (AUX6) pins.
No. 162 pin is input for EJECT key. When receiving input, it is in L. No. 166 pin is for
remote control input. When receiving input, there will be pulse input.
EEPROM for storing system setting information and resume information.
Decoding data buffer memory.
Memory for program control.
From No. 3 pin, VCC (5V) is input and from No. 2 pin, VCC33 (3.3V) is output.
Rising/Falling of VCC (5V) is detected by No. 5 pin, and L-reset output is made from No. 4 pin.
CH1-side is Rch and CH2-side Lch. Constitutes a multiple feedback-type active LPF.
Inverters are connected in 3-step parallel connection for increased current capacity and
output to the pulse transformer.
Flash memory for storing B/E program memory.
Flash memory for storing programs.
Digital audio signal is input from No. 3 (TWS), 2 (TSD0), 16 (MCLK), and 1 (TBCK) pins.
Also, signals for DAC system control are input from No. 15 (AUX0), 14 (AUX1), and 13 (AUX6) pins.
Output for Lch analog audio is made from No. 7 pin and that for Rch is made from No. 8 pin.
Built-in DVD/CD digital servo equalizer and various timing generation circuit.
Data generation from RF of DVD/CD, error correction and control over scramble analysis
and release.
F/E section 8bit microcomputer for system control.
ATAPI communication control with B/E.
Control signals for focus and tracking actuator signals of the pickup are received by No. 1 and
No. 26 pins respectively and currents are output from No. 13 and14 and No. 15 and 16 pins.
Control signals for the feed motor is received at No.6 pin and currents are output from
No. 11 and 12 pins.
Control signals for slot loading mechanism motor is received at No. 23 pin and currents
are output from No. 18 and 17 pins.
KDV-S210P/S220P
Operation / Condition / Compatibility
/S230P/S240P
3