Repairing a National Panasonic TC-261G
Фильм және анимация
Fixing a subscribers set, made in 1976 (the set, not the subscriber)
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0:00 Intro
1:23 Looking into the fault
3:19 Disassembly and inspection
10:51 Fault shows up!
12:07 The wrong schematic, with the right model number..
14:16 It dawns on me ..
17:18 Testing and tracing.
18:25 The first fault of many.
21:21 No change to the frame, but now no sound!
24:02 The unidexter!
27:32 No change :(
29:07 Is it a tantalum?
31:30 No. A 4-legged transistor?
33:29 The distress call, and helpful responses
38:27 Still faulty...
39:38 A better schematic
42:30 Finding the frame fault
44:22 Testing & copyright shenanigans
47:40 Fixing the sound
49:47 Fitting a new sound IF IC
53:17 Sound?
56:26 Removing the IF transformer
1:01:08 Sound!
1:04:14 Outro
1:08:08 Outtakes
Пікірлер: 4
Thanks again Doz. Been watching the set this week, working beautifully!
nice set lamp for its age looks great , nice repair despite being lead up the garden path by the original circuit , never quite understood why mid run they change stuff and then you end up looking for a revision on a shaz number why not just call it a b type or something
Nice telly.. Those early Japanese sets were very well made but not much consideration given to ease of servicing! The Tiny SA signal generator/spectrum analyser is a handy machine for injecting signals with problems like this.. Good for tracking down RFI(radio frequency interference) sources too. Shango uses one in his newer videos for generating 455 KHz IF signals.
@AndyDoz
Ай бұрын
I'm not sure why I didn't think about that at the time. It was only as I was editing the video!