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KVT-910DVD/920DVD/930DVD/
940DVD/960DVD
13
COMPONENTS DESCRIPTION
●
Video Control Unit (X14-634X-XX)
Ref.No.
Component name
Application / Functions
Operation / Conditions / Compatibility
IC1
TC74VHCT125AFT
3-State buffer
User for conversion of voltage levels on the interface of
mechanism and video sides.
IC3
TC9246F
PLL
When playing CD-DA, generates 16.9344MHz clock based on
44.1KHz.
IC4
TC74LCX16244AF
3-State buffer
Used for converting voltage level of the interface for mechanism
side and MPEG decoder.
IC6
HY57V16160DTC8
SD RAM
Used as the work area of the MPEG decoder.
IC7
TC74LCX74FT
D-type flip-flop
Used to synchronize signals output from the mechanism to MPEG decoder
IC8
TA48M025F
3-terminal regulator
Generates 3.3V to 2.5V voltages and supplies to MPEG decoder.
IC9
L64021H-G11
MPEG decoder
Used for MPEG2 decoder.
IC10
HD6417040AFI28
Video micom
For controlling video peripherals.
IC11
NJU7222U33
3-terminal regulator
Generates 5V to 3.3V voltages and supplies to Video encoder.
IC12
AK4353VF
Audio DAC
Used as stereo CMOS DYA converter.
IC13
PLL1700E
PLL
Generates 27MHz,16.9344MHz, and 36.864MHz clocks based on
27MHz clock.
IC14
LHF40V13-0N3
Flash memory
Used for booting video micom. Also for holding control data for
video encoder, audio DAC, and MPEG decoder.
IC15
MSM5118165B60T
DRAM
Used as the work area of the video micom.
IC16
ADV7170KSU
Video encoder
Encodes signals output from the MPEG decoder and generates
RGB and COMPOSITE signals.
IC17
NJU7222U50
3-terminal regulator
Generates 8V to 5V voltage and supplies to audio DAC.
IC18,19
NJM4565V
Ope-Amplifier
Used as buffer for LPF middle point potential.
IC20
AN7708SP
3-terminal regulator
Generates 14V to 8V voltages and supplies to LPF peripherals.
IC21
NJM2267V
75
Ω
Driver
Drives composite output at 75
Ω
.
IC22
TC74LCX245FT
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.
IC23
TC74LCX16244AF
3-state buffer
Used for conversion of voltage level between video micom and
MPEG decoder.
IC24
NJU7222U50
3-terminal regulator
Generates 8V to 5V voltage.
IC25
S-80942ANMP
Resetting IC
Generates write protect signals for the flash memory at power on.
IC26
TC7W00FU
NOR gate
Generates mute signals.
IC27
NJM4565V
Ope-Amplifier
Used for buffering audio signals.
IC28
TC7SH04F
Not gate
Used as buffer for clock output signal from crystal oscillator.
IC29,30
TC4W66FU
Analog switch
Used for switching audio signals.
IC200
TA78DS05AF
3-terminal regulator
For back up of system micom (IC217) and SRAM(IC225).
IC201
NJM2403V
Comparator
Monitors IC202 and IC203 conditions. If any abnormality occurs in
one of them, operation is stopped.
IC202,203 BA9743AFV
DC/DC converter
This IC produced any voltage from 14V power supply.
IC205
NJM4565V
Ope-amplifier
Buffer amplifier for Spectrum analyzer.
IC206
BA3830F
Spectrum analyzer
Band Rass filter for Spectrum analyzer.
IC207
PST9137NR
Reset IC
Used for resetting system micom.
IC208
MM1234XFBE
Video switch
Switches RGB signals coming from DVD (internal) and black box (external).
IC209
MM1389XFBE
Video switch
Puts graphic signals on the screen over the signals switched by IC208.
IC210
BU3616K
Video D/A converter
D/A converter for graphics.
IC211
NJM2235M
SYNC switch
Switch for DVD sync signals and TV or external sync signals.
IC212
HA12187FP
BUS IC
For MZBUS communication.
IC213
MSM5118165B60T
Video RAM
For saving graphic data.
IC214
HD64412F
Graphic accelerator
IC for graphic drawing
IC215
TC7SHU04F
NOTgate
For conducting logic reversal
IC216
TC7W04FU
NOT gate
Logic reversal buffer
IC217
703035AGC-013
System micom
For system controls.
IC218
MSM531622F76TS
ROM
Program ROM for graphics
IC219
TC9246F
PLL
Generates 9.53MHz by multiplying HSY(15.7KHz) by 606 times.