Technical data

65
Magnavox LCD TV
Go to cover page
1.No Work/LED is off
Check if
power switch
is normal
No
Replace power switch
Yes
Check if AC
adaptor output
=16V
No
Replace power adaptor
Check the inverter board
Yes
Pin1.2.3=16V
Pin5=0~4.7V
2.No raster/picture
too dim
Check if 1801 on
inverter board
pin1,2,3=16V
pin5=0~4.7V
Check working
volt
age, backlight
controlsignal and
brightness control
signal on scaler board
No
Yes
Check if 1302 on
scaler board
pin3=3.3V
No
Check IR board
Check if working voltage
pin3=3.3Vof 7303
3307=3.3V 3313=5V
1304 Pin1=5V
Check circuit around
each regulator and
eliminate short and
open situation
3.No picture/LED
is green
No
Check if clock source
1401,1301,1621
Replace 1401,1301,1621
No
Yes
No
Check if scaler 7401
RGB,clk,H/Vand
DEsignal output
48 bits TTL
Try to replace
CPU or CPU'Sflash Rom
CPU'S EEPROM
Painter
Painter's EEPROM
Yes
No
Check resistors-
network
Replace badresistors-
network
Yes
Replace LVDScable
Replace LCD panel
No
4.NoD-Sub picture
Check if H/V
signals input to
schmitt trigger
7201
No
Check input path
Yes
Check if schmitt
trigger 7201
output H/V signals
to JAGASM
No
Replace 7201
Yes
Go to 3.No picture/LED is green
Repair Flow Chart