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Forum Free Registration Closed
Granada Television Brochure, 1970s
Long Gone UK TV Shops
Memories of a Derwent Field Service Engineer
PYE Australia Circa 1971
Radios-TV VRAT
Fabulous Fablon
Thorn TX10 Chassis
Crusty-TV Museum, Analogue TV Network
Philips N1500 Warning!
Rumbelows
Thorn EMI Advertising
Thorn’s Guide to Servicing a VCR
Ferguson 3V24 De-Robed
Want to tell us a story?
Video Circuits V15 – Tripler Tester
Thorn Chassis Guide
Remove Teletext Lines & VCR Problems
Ceefax (Teletext)
Suggestions
Website Refresh
Colour TV Brochures
1970s Lounge Recreation
CrustyTV Vintage Television Museum
Linda Lovelace Experience
Humbars on a Sony KV2702
1972 Ultra 6713
D|E|R Service “The Best”
The one that got away
Technical information
The Line Output Stage
The map
Tales of a newly qualified young engineer.
Tales of a Radio Rentals Van Boy
Sanyo SMD
Disastrous Company Rebranding
1969 Philips G22K511
Memories Of The TV Trade
Crazy house
Dirty TV screens
Dual Standard and Single Standard CTV’s
Radios-TV on YouTube
The Winter of 62/63
A domestic audio installation
1979 Ferguson Videostar Deluxe 3V16
Music centre modifications
Unusual record player modification
B&K 467 Adapters
Mishaps In The Trade
1971 Beovision 3200
CTV Hitachi CWP-132
Woke up one morning to find this in front of my car!
I later found out it was left by a friend who knows me way too well...
I think it's late 1970s. Quite an unusual 12" CRT.
Apparently my friend plugged it in and heard a bang.
There’s one of those in my lock up! Got it off the tip back in 2005 before they went daft and stopped letting you buy stuff. It actually worked too, I remember there being an O/C resistor on the tube base PCB causing over bright picture with fly back lines. Be interesting to find out why your one went bang!
Regards
Lloyd
1977, service manual is available for download here
https://archive.org/details/manual_CWP132_SM_HITACHI_EN
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This mains smoothing capacitor is clearly what went bang:
Brought it up slowly on a 40 watt bulb in series, followed by a 60 then 100 watt and I was greeted with a very small dim raster on the screen and the sound of static through speaker. It seemed to be behaving itself, so I upped it to a 150 watt bulb. Full raster! Leave in on that for a few minutes to check everything is ok and I go to full mains.
Seemed ok for a few minutes but then I noticed the brightness going quickly followed by something on the right side decided to release the magic smoke. I think it was one of the brown capacitors near the bottom of this pic:
Oh well, at least it's a starting point.
They we’re expensive, most sections of the CTV are the same as larger sets and parts cost of the CRT power sections very similar.
At a time when many customers were getting their first large screen CTV a small portable if they could afford it would be BW.
We did sell a few but the mono portables were more popular.
Frank
@nuvistor Aha! That explains why the service manual is mainly concentrated on the 20" Hitachi sets! I was a bit puzzled by that even though it clearly mentions the correct model number of mine.
There's a couple of "daughter boards" in the 12" version that aren't mentioned in the manual.
Most people I knew when I was young had a B&W set if they had a second set at all.
Home computers probably helped the sale of small colour sets in the 1980s. Normally 14" was the minimum size for them, but I have a Toshiba 10" colour set which was made in 1986. In the 1990s 9 & 10" colour sets became more common, especially for use in caravans.
And now we have people watching colour TV (albeit iPlayer etc) on 5 inch screens.
Frank
@richardfrommarple yeah, I remember watching Doctor Who, the Peter Davison era on a black and white portable upstairs in the early 80s.
I was given a Granada Colourette/Kubo Portacolor by a TV repair guy a few years later, which had a 12" CRT and was the first TV I learned to fix, although I could never really solve the overheating issue it had and the picture was a bit crap and fuzzy but over the years I've learned that this was entirely normal for these!
Heh, the music video to Herbie Hancock's Rockit:
This music video was from 1983 so it would've been a few years old even then.
@cathovisor I've been trying to identify what model of TV that was for years:
Oh...
😱 yup, that is what I think it is!
Whilst occupying myself with the mystery monitor, the Sony and the National Panasonic Quintrix, I completely neglected to mention that I got another Hitachi!
This one's actually a CWP-133 which seems to be a bit higher spec than the 132. The main difference being the 133's tuner:
Instead of the 132's single rotary UHF tuner:
Would be nice to get both of these working, although if I have to make one good set out of the two that's an option Cosmetically they're about the same.
Post content deleted, information in earlier post, apologies.
Frank
Well, the CWP-133 is actually working, kinda. Very dim raster:
The red line seems to be an on-screen tuning indicator!
I wasn't sure what that symbol next to the button meant but it's clearly for switching the tuning on and off. The button seems broken though as pressing it has no effect on the line.
I've seen an issue with these TVs where the electrolytic capacitors start to fail and cause the picture to go very dim. This one is in much better condition inside than the CWP-132.
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