Polaroid FLM-3201 Service Manual - Page 24

raster, but no picture - power board

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2. raster, but no picture Check if the unit yes Check if the all no can operation? channels have signal? no Replacing CPU board Enter factory-menu, operation CLEAR no EEPROM, then turn off , turn on again , it if display picture. yes Adjust CPU board again YPRPB Which is no VGA/DVI signal of channels Replacing CPU board TV Testing power supply (+5V-V) of video processing board Check input 22V no of sound conversion board no Replacing no U30 Testing yes PIN65 of Display U30 SYNC "NO-SIGNAL" signal no Replacing U13 Testing no 1VPP signal of TP1, TP2, TP3. yes Replacing CPU board yes yes Check if PIN2 1VPP signal and noise wave of P32? yes Check if PIN56 15.734KHz sync signal of U29? no Replacing U29 Check input 12V-A of CPU board no Check output 24V-A of power supply board no Replacing TUNER01 21

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2
1
2. raster, but no picture
Check if the unit
can operation?
Check
if
the
all
channels have signal?
Replacing
CPU board
Enter
factory-menu,
operation
CLEAR
EEPROM,
then
turn
off , turn on again , it if
display picture.
Adjust CPU board
again
Which is no
signal
of
channels
Replacing CPU
board
Testing
power
supply
(
+
5V-V)
of
video
processing board
Check input 22V
of
sound
conversion board
Check input 12V-A
of CPU board
Check output 24V-A of
power supply board
Check if PIN2
1VPP
signal
and noise wave
of P32?
Replacing
TUNER01
Check if PIN56
15.734KHz
sync signal of
U29?
Replacing U29
Display
“NO-SIGNAL”
Testing
1VPP signal
of
TP1,
TP2, TP3.
Replacing CPU board
Replacing U13
Testing
PIN65
of
U30
SYNC
signal
Replacing
U30
no
yes
no
yes
no
no
yes
VGA/DVI
TV
YPRPB
yes
yes
no
no
yes
no
no
no
no
no
yes