Components Description - Kenwood KVT-910DVD Service Manual

GVideo Control Unit (X14-634X-XX)
Ref.No. Component name
IC1 TC74VHCT125AFT
IC3 TC9246F
IC4 TC74LCX16244AF
IC6 HY57V16160DTC8
IC7 TC74LCX74FT
IC8 TA48M025F
IC9 L64021H-G11
IC10 HD6417040AFI28
IC11 NJU7222U33
IC12 AK4353VF
IC13 PLL1700E
IC14 LHF40V13-0N3
IC15 MSM5118165B60T
IC16 ADV7170KSU
IC17 NJU7222U50
IC18,19 NJM4565V
IC20 AN7708SP
IC21 NJM2267V
IC22 TC74LCX245FT
IC23 TC74LCX16244AF
IC24 NJU7222U50
IC25 S-80942ANMP
IC26 TC7W00FU
IC27 NJM4565V
IC28 TC7SH04F
IC29,30 TC4W66FU
IC200 TA78DS05AF
IC201 NJM2403V
IC202,203 BA9743AFV
IC205 NJM4565V
IC206 BA3830F
IC207 PST9137NR
IC208 MM1234XFBE
IC209 MM1389XFBE
IC210 BU3616K
IC211 NJM2235M
IC212 HA12187FP
IC213 MSM5118165B60T
IC214 HD64412F
IC215 TC7SHU04F
IC216 TC7W04FU
IC217 703035AGC-013
IC218 MSM531622F76TS
IC219 TC9246F
KVT-910DVD/920DVD/930DVD/

COMPONENTS DESCRIPTION

Application / Functions
User for conversion of voltage levels on the interface of
3-State buffer
mechanism and video sides.
When playing CD-DA, generates 16.9344MHz clock based on
PLL
44.1KHz.
Used for converting voltage level of the interface for mechanism
3-State buffer
side and MPEG decoder.
SD RAM Used as the work area of the MPEG decoder.
D-type flip-flop Used to synchronize signals output from the mechanism to MPEG decoder
3-terminal regulator Generates 3.3V to 2.5V voltages and supplies to MPEG decoder.
MPEG decoder Used for MPEG2 decoder.
Video micom For controlling video peripherals.
3-terminal regulator Generates 5V to 3.3V voltages and supplies to Video encoder.
Audio DAC Used as stereo CMOS DYA converter.
Generates 27MHz,16.9344MHz, and 36.864MHz clocks based on
PLL
27MHz clock.
Used for booting video micom. Also for holding control data for
Flash memory
video encoder, audio DAC, and MPEG decoder.
DRAM Used as the work area of the video micom.
Encodes signals output from the MPEG decoder and generates
Video encoder
RGB and COMPOSITE signals.
3-terminal regulator Generates 8V to 5V voltage and supplies to audio DAC.
Ope-Amplifier Used as buffer for LPF middle point potential.
3-terminal regulator Generates 14V to 8V voltages and supplies to LPF peripherals.
75Ω Driver Drives composite output at 75Ω.
Bi-directional MPEG decoder uses 3.3V and video micom uses 5V. This buffer is
3-state buffer used for level conversion between these voltages.
Used for conversion of voltage level between video micom and
3-state buffe r
MPEG decoder.
3-terminal regulator Generates 8V to 5V voltage.
Resetting IC Generates write protect signals for the flash memory at power on.
NOR gate Generates mute signals.
Ope-Amplifier Used for buffering audio signals.
Not gate Used as buffer for clock output signal from crystal oscillator.
Analog switch Used for switching audio signals.
3-terminal regulator For back up of system micom (IC217) and SRAM(IC225).
Monitors IC202 and IC203 conditions. If any abnormality occurs in
Comparator
one of them, operation is stopped.
DC/DC converter This IC produced any voltage from 14V power supply.
Ope-amplifier Buffer amplifier for Spectrum analyzer.
Spectrum analyzer Band Rass filter for Spectrum analyzer.
Reset IC Used for resetting system micom.
Video switch Switches RGB signals coming from DVD (internal) and black box (external).
Video switch Puts graphic signals on the screen over the signals switched by IC208.
Video D/A converter D/A converter for graphics.
SYNC switch Switch for DVD sync signals and TV or external sync signals.
BUS IC For MZBUS communication.
Video RAM For saving graphic data.
Graphic accelerator IC for graphic drawing
NOTgate For conducting logic reversal
NOT gate Logic reversal buffer
System micom For system controls.
ROM Program ROM for graphics
PLL Generates 9.53MHz by multiplying HSY(15.7KHz) by 606 times.
940DVD/960DVD
Operation / Conditions / Compatibility
13