Video Unit (X35-4280-01) - Kenwood KVT-715DVD Service Manual

KVT-715DVD,725DVD/-B,735DVD
KVT-745DVD,765DVD,815DVD
QQ
3 7 63 1515 0
Ref No. Application / Functions
Q23 P-ANT SW
Q24 SW
Q25 SW
Q26 BU det.
Q27 EXT-AMP sw
Q100 Inverter sw
Q200 SW (AM AVR)
Q201 SW (AM AVR)
Q300 Noise det. sw
Q301 S-mute sw
Q460 Reset sw
Q551~554 Voltage shift
Q600~606 Preout mute
Q603 Preout mute
Q608,610 AV out mute
Q609 AV out mute
Q900 Fan 5V
Q901 Fan 5V
TE
L 13942296513
Q902 Fan 5V
Q903 Fan 5V
Q904~906 Noise cancel

VIDEO UNIT (X35-4280-01)

Ref No. Application / Functions
IC1 Inverter control IC
IC101 DC/DC converter
IC203 Amp
IC301 Timing controller
IC302 AND
IC303 PLL LPF
IC304 Schmidt inverter
IC401 Dimmer sensor
Q1 Dimmer SW
Q2,3 Inverter driver
Q5 AVR
Q201~203 VCOM driver
Q301 VCO
www
Q501 Touch panel Y1 sw
Q502 Touch panel X0/Y1 sw
Q503 Touch panel X1/Y0 sw
.
Q601 SW
8
COMPONENTS DESCRIPTION
Q23 is ON when Q20 is ON
Q24 is ON when Q25 is ON
Q25 is ON When supplied for BU14V and Q25 is OFF When Q22 is ON
Q26 is ON When supplied for BU detect
Q27 is ON when Ext-cont is L
Q100 is ON when S-MUTE is ON
Q200 is ON when select for TUNER function
Q201 is ON when Q200 is ON
Q300 is ON when QUAL terminal is H for IC301
Q301 is ON when Q100 is ON
For TV reset signal (invert for reset signal )
Voltage shift for 5V to 8V (for audio selector sw)
Q600~606 is ON when Q603 is ON (for pre out muting)
Q603 is ON when MUTE-PRE is ON (for pre out muting)
Q608, 610 is ON when Q609 is ON
Q609 is ON when MUTE-AVOUT is ON (for AV out muting)
Q900 is ON when Q901 is ON
Q901 is ON when Q902 is ON
Q902 is ON When supplied for SW5V
Q903 is ON when Q900 is ON
Noise cancel circuit
Control for LCD back light (inverter circuit and driver)
For VCOM amp (±12V, for LCD -12.0V/+18.5V)
VCOM signal amp
Control for LCD
V. SYNC delay line buffer
PLL control LPF (VT voltage control)
Waveform shaping for c.sync signal
Dimmer detect sensor
On and off is carried out with the control of PWM signal, and dimmer for LCD back light
Drive for inverter circuit
5V output for inverter control IC
VCOM signal buffer
PLL oscillator
Y0 (X0) SW Y (X)axis input data : ON, X (Y) axis input data : OFF
x ao u163
Y1 SW Y axis input data : ON and impressed voltage
y
X1 SW Detect to touch panel or X axis data input : ON and impressed voltage
i
OPEN/CLOSE key illumination blinking sw
2 9
8
Operation / Condition / Compatibility
Q Q
3 6 7 1 3 1 5
Operation / Condition / Compatibility
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9