73
TPF1.3A LA
1.
No Work/
L
ED is off
Check if
power switch
is normal
No
Replace power switch
Yes
Check if
A
C
adaptor output
=
1
6V
No
Replace power adaptor
Check the inverter board
Yes
2
.
No raster/picture
too dim
Check if
1
00
1
on
scaler board
pin
1
,2,
3
=
1
6V
pin 5=0~4
.7
V
Check working
voltage, backlight
control signal and
brightness control
signal on scaler board
No
Yes
Check if
13
02 on
scaler board
pin
3
=
3.3
V
No
Check IR board
Check if working voltage
pin
3
=
3.3
V of
73
0
3
33
0
7
=
3.3
V
3313
=5V
13
04
P
in
1
=5V
Check circuit around
each regulator and
eliminate short and
open situation
3.
No picture/
L
ED
is green
No
Check if clock source
1
40
1
,
13
0
1
,
1
62
1
Replace
1
40
1
,
13
0
1
,
1
62
1
No
Yes
No
Check if scaler
7
40
1
RGB,clk,H/V and
DE signal output
48 bits
TTL
T
ry to replace
C
P
U or C
P
U'Sflash Rom
C
P
U'S EE
P
ROM
P
ainter
P
ainter's EE
P
ROM
Yes
No
Check resistors-
network
Replace bad resistors-
network
Yes
Replace
L
VDS cable
Replace
L
CD panel
No
4
.
No D-Sub picture
Check if H/V
signals input to
schmitt trigger
7
20
1
No
Check input path
Yes
Check if schmitt
trigger
7
20
1
output H/V signals
to J
A
G
A
SM
No
Replace
7
20
1
Yes
Go to
3.
No picture/
L
ED is green
Repair
F
low Chart
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