Hitachi P50T01E Service Manual page 21

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