Roadstar LCD-3500, Service Manual

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PART 1 RASTER YES/NO?
TROUBLE PHENOMENON SOLVING ACTION
1 NO RASTER AND NO SOUND SIGNAL
·
CHECK AC ADAPTOR CONNECTION
·
REPLACE FRESH BATTERIES
2 NO RASTER AND HAVE SOUND
·
H.V CIRCUIT OR LCD PANEL.
PART 2 NORMAL RASTER YES/NO?
TROUBLE PHENMENON SOLVING ACTION
1 RASTER TOO CLUTTER
·
LCD PANEL IS BAD
·
CHECK PVI-1004B (LCD DRIVER)CIRCUIT
2 RASTER TOO DARK
·
LCD PANE IS BAD
·
H.VOLT CIRCUIT IS BAD
PART 3 PICTURE YES/NO?
TROUBLE PHENMENON SOLVING ACTION
1 NO PICTURE
·
MAKE SURE THE ANTENNA IS NOT BROKEN
·
ADJUST THE BRIGHTNESS AND CONTRAST
CONTROLS
2 NOISE AND WAVE (VIDEO)
·
ANTENNA OR HIGH FREQUENCY AMPLIFIER OR
TUNER
3 NO NOISE AND WAVE (VIDEO)
·
TUNER OR IF AMPLIFIER OR AGC
4 SCANNING RETRACE LINE
·
VIDEO FREQUENCY AMPLIFIER CIRCUIT
PART 4 NORMAL RASTER YES/NO?
TROUBLE PHENMENON SOLVING ACTION
1
THE VERTICAL AND HORIZONTAL
FREQUENCY ARE NOT SYNCHRONIZE.
·
PUBLIC CHANNEL OR AGC OR SYNCHRONIZING
SEPARATION CIRCUIT
2
THE VERTICAL FREQUENCY IS NOT
SYNCHRONIZE
·
VERTICAL OSCILLATOR OR INTEGRATED CIRCUIT
3 INTERFERED
·
AFC CIRCUIT OR HORIZONTAL
OSCILLATOR OR POWER SUPPLY ORINTERFERED
BY POWER SUPPLY AND OUTSIDE OR HORIZONTAL
OUTPUT OR SOUND SIGNAL ABSORBING ETC
4 SOFT PICTURE OR NO CLEAR
·
TUNER OR PICTURE CHANNEL OR AGC OR VIDEO
FREQUENCY AMPLIFIER
PART 5 NORMAL SOUND SIGNAL YES/NO?
TROUBLE PHENMENON SOLVING ACTION
1
NO SOUND SIGNAL OR LIGHT SOUND
VOICE OR SOUND SIGNAL DISTORTION
·
SOUND SIGNNAL CHANNEL
PART 6 NORMAL COLOR YES/NO?
TROUBLE PHENMENON SOLVING ACTION
1 NO COLOR
·
CHECK COLOR DECODE CIRCUIT(IR3Y31)