Service manual

20
P50T01U/E P50TP01U/E P42T01U/E P42TP01U/E
[Picture: DTT troubleshooting]
DTT
[IWP1] Pin4 (+3.3V)/5(+5.6V)
[IWP2] Pin2/3 (+5.6V)/7/8(+3.3V)
[IW02] Pin2 (+5.6V)/4(+3.3V)
[IW03] Pin1/3 (+2.5V)/5(+1.2V)
[IW04] Pin1/5 (+3.3V)/4(+2.5V)
Check if DW01 of SLOT PCB lights?
Change MAIN PCB or SLOT PCB
Yes
No
d
Are the voltages of IWP1, IWP2, IW02,
IW03, IW04 of SLOT PCB
normal?
Change SLOT PCB
No
Yes
Are the signals of
pin14(SDA)/15(SCL)/17(IF02)/18(IF01) of
UT02 of Terminal PCB
normal?
No
Yes
Change UT02 of Terminal PCB
Are the signals of
pin37(MCLKo)/35(Mdo0)/27(MoVAL)/26(M
oSYNC)/46(MPEG_PD7) of PW01 of
SLOT PCB normal?
No
Yes
Are the signals of
pin44(MCLKo)/45(Mdo_0)/46(MoVAL)/48
(MoSYNC)/61(MPEG_PDAT_7) of IW01 of
SLOT PCB normal?
No
Yes
Change SLOT PCB
Change MAIN PCB
Change MAIN PCB
If no improvement,
change SLOT PCB or EMP0 (FFC
cable
)
.