No Raster State - Sony PFM-42X1 Service Manual

3-2. No Raster State

NO RASTER ON ANALOG
SIGNAL
Check LED
Status on
Display Head
Amber
Check
U12(AD9888)
.HSYNC-ADC
.VSYNC-ADC
.DCLK-ADC
.DATA
Pass
. Check the D-sub Connection
- Y/Pb/Pr Jack check
. Check the other Device
- IC26, IC27 (SD RAM)
- IC44 (LVDS83) Pin#32
PFM-42X1/42X1N
Check
Power Line
Green
IC21, IC45,
IC20, IC22,
IC23, IC24
Fail
Replace Device
IC21, IC30, IC4
Fail
' A ' Process
3.3 V
Check
2.5 V
Ctrl signal
IC44 Pin#32
(LVDS583)
Pass
Check
Scaler (IC14)
Output
. PCLOCK
. PVSYNC
. PHSYNC
. PVALID
.DATA
Pass
Check
Control Signal
' DISPEN '
CN501 Pin #27
Pass
Find a
Soldering Error
or check the
oscillator (X5)
Fail
Replace
the Main Board
Replace
Fail
the Power Board
Fail
Replace
the Main Board
Fail
Replace
the Main Board
Fail
Replace
the Main Board
3-3