Components Description; Electric Unit (X34-4320-61); Video Unit (X35-4640-62) - Kenwood LZ-702IR Service Manual

LZ-702IR
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3 7 63 1515 0

ELECTRIC UNIT (X34-4320-61)

Ref. No. Application / Function
IC101 8.5V REG
IC102 5V REG
IC201 ISO AMP
IC202 ISO AMP
IC401 VIDEO AMP
IC501 AV SW
IC801 NON-INVERTER
Q104 REVERSE DET
Q401 VIDEO DRIVER
Q402,403 MUTE
Q404~406 MUTE DRIVER

VIDEO UNIT (X35-4640-62)

Ref. No. Application / Function
IC1 V.SYNC DELAY BUFFER
TE
IC3 TIMING CONTROLLER
L 13942296513
IC4 PLL LPF
IC101 3.3V→5V
IC103 TIMING CONTROLLER
IC104 V.MUTE COMPOSER
IC105 HSY/VSY COMPOSITE SYNC COMPOSER
IC106 MUTE INVERTER
IC108 3.3V→5V
IC202 DC-DC CONVERTER
IC300 RESET IC
IC301 MPU IC
IC302 E2PROM
IC303 E2PROM
IC304 DIMMER/VCOM SW
IC400 REMOTE SENSOR
IC401 DIMMER SENSOR
IC402 5V→3.3V
IC500 INVERTER CONTROLLER
IC501 DC-DC CONVERTER
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IC502 ACC5.0V REG
IC503 ACC3.3V REG
.
IC505 SW5.0V REG
IC506 SW3.3V REG
4

COMPONENTS DESCRIPTION

Regulates 8.5V
Regulates 5V
Audio input isolation amplifier (AV-IN2)
Audio input isolation amplifier (AV-IN1)
75Ω driver with 6dB amplifier for composite signal
AV input and output amplifier
Buffer
Detects reverse signal
Drives video signal
P.ON output turns Q405 and Q406 on when trigger is muted
Muting driver for Lch and Rch
Buffer for V.SYNC delay signal
Controls LCD modulator
LPF for PLL control (VT voltage control)
3.3V→5V conversion
Controls LCD modulator
Composes V.MUTE signal
Composes HSY and VSY composite synchronous signals
Inverts mute signal
3.3V→5V conversion
Controls +14, -12V and +18.5V
Resets µ-com
Controls unit (X35-)
Memory for µ-com
ROM correction
Switches DIMMER to V.COM, or V.COM to DIMMER
Detects remote signal
Detects auto dimmer
5V→3.3V conversion
Controls and drives backlight inverter
Controls SW8V and SW8.5V
Composes ACC5.0V
x ao u163
y
Composes ACC3.3V
i
Composes SW5.0V
Composes SW3.3V
2 9
8
Operation / Condition / Compatibility
Operation / Condition / Compatibility
Q Q
3 6 7 1 3 1 5
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9