HP PL4260N Service Manual
Download Service manual of HP PL4260N - 42" Plasma TV Flat Panel TV, HDTV for Free or View it Online on All-Guides.com.
Brand: HP
Category: Flat Panel TV , HDTV , LCD TV , Plasma TV , TV , TV Receiver
Type: Service manual
Model: HP PL4260N - 42" Plasma TV , HP PL5060N
Pages: 245
3. Checking for Component Damage
3-1. Y IPM(IC18) or Z IPM(IC2) Damage
(1) When the internal Sustain FET or ER FET of Y B/D
IPM(IC18) or Z B/D IPM(IC2) is damaged, screen doesn’t
be shown or Mis - discharge of partial screen is generated.
Test Point : Enlarge after measuring
GND ~ Waveform(Y DRV B/D),
GND ~ B28(Z B/D).
Wave format : Y DRV B/D in Waveform or B28(Z B/D)
has no output wave.
3-2.
FET Ass’y(Y B/D : HS2) Damage
(1) When Set_Up FET(2nd FFT of HS2 ) is damaged, screen
doesn’t be shown.
O Test Point : Enlarge after measuring
GND ~ Waveform(Y DRV B/D)
O Wave format : As shown fig. 2
(2) When Set_Down FET/Pass_Top FET(1st, 3rd, 4th, 5th
FFT of HS2 ) is damaged, Mis - discharge of entire screen
is generated.
O Test Point : Enlarge after measuring
GND ~ Waveform(Y DRV B/D)
O Wave format : As shown fig. 3
Set up waveform
does not come out
<Fig. 3 When the Set_Down FET is damaged>
<Fig. 1 IPM Normal Output Wave>
Set up waveform
does not come out
<Fig. 2 When the Set_Up FET is damaged>