C
cirip
Guest
Hi All,
I have a Sony KV-20TS30 TV set and it is not stable on the channel. It keeps
hunting. It looks like the controller is not able to identify when the TV is
properly tuned. I checked CLK, DATA and LAT that go to the synthesizer chip
and they keep toggling.
Tried to find datasheets for some of the chips, but they are impossible to
find. Synthesizer is CX23055 and there's another Sony 20155 chip on the
tuner.
Does anyone have a schematic diagram available? I suspect there might be a
null or some sort of voltage that indicates the correct tuning, but I am
reluctant to dig too deep without a schematic or at least the pinouts of the
chips. No idea what the IF chip is, also.
Thanks a lot,
Cirip
I have a Sony KV-20TS30 TV set and it is not stable on the channel. It keeps
hunting. It looks like the controller is not able to identify when the TV is
properly tuned. I checked CLK, DATA and LAT that go to the synthesizer chip
and they keep toggling.
Tried to find datasheets for some of the chips, but they are impossible to
find. Synthesizer is CX23055 and there's another Sony 20155 chip on the
tuner.
Does anyone have a schematic diagram available? I suspect there might be a
null or some sort of voltage that indicates the correct tuning, but I am
reluctant to dig too deep without a schematic or at least the pinouts of the
chips. No idea what the IF chip is, also.
Thanks a lot,
Cirip