J
jango2
- Jan 1, 1970
- 0
Hi folks,
How come plasma service manuals come without a power supply and syscon
schematic ? I paid 25 US$ and i'm told manufacturers never publish PS
schematics in the service manual. Incidentally the TV i'm trying to
fix is a Hitachi 42PD7800TA Plasma display panel. The ps is made by
Murata MPF7415. The Murata website offers no info on the ps either. I
guess thats understandable ...OEM.
Symptom: Set clicks on (relay sound) some supplies are available, 30
volts measured at 35, Vs and Va are both very low ( 5 volts instead of
63) and then the set clicks off (protect?)
The power control pin of the ps seems to recognise 0.05 volts as an on
signal. If i disconnect that then the set wont turn on at all. The set
trips within 2 seconds from power on. Any clues? The manual i've got
is 16 Mb. Does anyone here have the full manual? How big is it? Even
the syscon section is missing from the manual.
Jango
How come plasma service manuals come without a power supply and syscon
schematic ? I paid 25 US$ and i'm told manufacturers never publish PS
schematics in the service manual. Incidentally the TV i'm trying to
fix is a Hitachi 42PD7800TA Plasma display panel. The ps is made by
Murata MPF7415. The Murata website offers no info on the ps either. I
guess thats understandable ...OEM.
Symptom: Set clicks on (relay sound) some supplies are available, 30
volts measured at 35, Vs and Va are both very low ( 5 volts instead of
63) and then the set clicks off (protect?)
The power control pin of the ps seems to recognise 0.05 volts as an on
signal. If i disconnect that then the set wont turn on at all. The set
trips within 2 seconds from power on. Any clues? The manual i've got
is 16 Mb. Does anyone here have the full manual? How big is it? Even
the syscon section is missing from the manual.
Jango