JVC TM-H1375SU - high pitched sound, onto recap

[digitron]

Hello Freinds of the Interwebz and/or NetherRealmz,

I recently picked up a JVC H1375SU (S-Video, 750 lines), the display looks wonderful however it has the commonly found high-pitched noise (like a dog whistle).

I'm very confident with a soldering iron but don't know my way around CRT's as much as I'd like to. After some brief searches, I read something about possibly changing all the electrolytic capacitors? Should I go down that path?

Not sure where to start, p/n's for cap's, knowing which ones to replace, etc.

Thank you,

Digitron

[Dochartaigh]

When was the last time you used a CRT? Many make an audible, but usually soft 15khz squeal - but most of us can't hear it anymore (just like the super high pitched cell phone ringers the kids sometimes use - which the older teacher can't hear during class).

Could also mean the flyback is going though... I just did a quick search and some say failing capacitors as well but never personally heard of that.

[digitron]

The guy I bought it from said its been sitting in storage since 2010 and was barely used before that, I'm going off his word but I did pick it up from his storage unit so that supports his story...I made a video, not sure if my phone picked it up. I used CRTs a lot growing up, i definitely don't remember them being this loud. Its REALLY bad from my sons perspective, he walks in the door and is like "OH MY GOSH WHAT THE HECK IS THAT SOUND!!!" lol

I discharged the tube then connected it back up, adjusted the flyback and it didn't make a difference.

https://www.youtube.com/watch?v=ABa4eaAsaLM

[FBX]

I wasn't able to hear anything from that video. It sounds to me like you've got the typical 15.75KHz frequency noise generation of CRTs. The fact that it was more harsh on your son's ears lends more weight to that concept. Even so, you could always try a full recap.

[digitron]

Thanks FBX, I have no problem doing a full re-cap, my problem is finding out exactly which caps to replace, I haven't been able to find a service manual for this particular model.

If I can't find a service manual I guess I'll just write down each and every single electrolytic capacitor in there and order a replacement?

[FBX]

If I can't find a service manual I guess I'll just write down each and every single electrolytic capacitor in there and order a replacement?

Yep, try to measure the diameter, height and lead spacing in addition to the capacitance and voltage. Write everything down to keep a log of location and cap attributes. On the voltage, you can safely use at or higher ratings. So if you find some in the right size and capacitance, but are 25V instead of 10V, you can totally use them no problem.

[digitron]

.

[digitron]

Documented which caps go where, removed them, now I'll measure them and spend a couple hours on Digikey, lol..


https://imgur.com/e8pRQBO


https://imgur.com/bRqzVIb

For anyone else who reads this 10 years from now, here is every Electrolytic Capacitor on the JVC TM-H1375SU main board and CRT PB board.

Quantity Part Number Manufacturer Part Number Description Unit Price Extended Price
2 1572-1498-ND 478CKS016M CAP ALUM 4700UF 20% 16V T/H 1.09 $2.18
1 1572-1745-ND 477CKE100M CAP ALUM 470UF 20% 100V RADIAL 1.48 $1.48
1 P19596CT-ND ECE-A1HN4R7UB CAP ALUM 4.7UF 20% 50V RADIAL 0.33 $0.33
1 493-4757-1-ND UCA2C101MHD1TN CAP ALUM 100UF 20% 160V RADIAL 1.55 $1.55
1 UVY1E222MHD-ND UVY1E222MHD CAP ALUM 2200UF 20% 25V RADIAL 1.03 $1.03
2 565-1739-ND EKZE101ELL221MK25S CAP ALUM 220UF 20% 100V RADIAL 1.19 $2.38
1 565-3896-ND EKYB250ELL222MK25S CAP ALUM 2200UF 20% 25V RADIAL 1.13 $1.13
3 399-6603-ND ESK108M025AH4AA CAP ALUM 1000UF 20% 25V RADIAL 0.49 $1.47
2 493-15432-ND UKT1E102MPD CAP ALUM 1000UF 20% 25V RADIAL 0.92 $1.84
1 P5167-ND ECA-1VM331 CAP ALUM 330UF 20% 35V RADIAL 0.48 $0.48
2 P5155-ND ECA-1EM471 CAP ALUM 470UF 20% 25V RADIAL 0.48 $0.96
2 P5141-ND ECA-1CM471 CAP ALUM 470UF 20% 16V RADIAL 0.1 $0.20
1 493-15236-1-ND UHE1E221MPD1TD CAP ALUM 220UF 20% 25V RADIAL 0.44 $0.44
1 493-15063-ND UFG1E101MPM CAP ALUM 100UF 20% 25V RADIAL 0.48 $0.48
1 493-15359-1-ND UKL1E101KPDANATA CAP ALUM 100UF 20% 25V RADIAL 0.61 $0.61
1 493-15121-ND UFW1C221MED CAP ALUM 220UF 20% 16V RADIAL 0.29 $0.29
1 P5321-ND ECA-2CM4R7 CAP ALUM 4.7UF 20% 160V RADIAL 0.31 $0.31
2 P19525CT-ND ECA-1HHG2R2I CAP ALUM 2.2UF 20% 50V RADIAL 0.25 $0.50
1 P19662CT-ND EEU-FC1H4R7H CAP ALUM 4.7UF 20% 50V RADIAL 0.29 $0.29
1 493-7455-1-ND UVK1A221MDD1TD CAP ALUM 220UF 20% 10V RADIAL 0.28 $0.28
1 P19442CT-ND EEU-FC1H2R2H CAP ALUM 2.2UF 20% 50V RADIAL 0.29 $0.29
2 604-1118-ND RFS-50V010MF3#5 CAP ALUM 1UF 20% 50V RADIAL 0.39 $0.78
1 P1370-ND ECE-A1AN101X CAP ALUM 100UF 20% 10V RADIAL 0.45 $0.45
1 493-15677-ND UPJ2A100MED CAP ALUM 10UF 20% 100V RADIAL 0.4 $0.40
1 493-4768-1-ND UCA2E330MHD1TO CAP ALUM 33UF 20% 250V RADIAL 0.97 $0.97
1 493-2018-ND UPW2E010MED CAP ALUM 1UF 20% 250V RADIAL 0.32 $0.32
2 P19525CT-ND ECA-1HHG2R2I CAP ALUM 2.2UF 20% 50V RADIAL 0.25 $0.50
2 493-14719-1-ND UKL1H100KDD1TD CAP ALUM 10UF 20% 50V THRU HOLE 0.32 $0.64
5 P19520CT-ND ECA-1EHG470I CAP ALUM 47UF 20% 25V RADIAL 0.25 $1.25
4 493-5010-1-ND UPJ1C101MED1TD CAP ALUM 100UF 20% 16V RADIAL 0.32 $1.28
1 493-3230-ND LGW2G391MELB45 CAP ALUM 390UF 20% 400V SNAP 8.02 $8.02

[okgrak]

Digging up an older thread. About to pickup one of these monitors.

How did the cap rebuild work out? Do you still recommend this display and any luck RGB modding it?

[okgrak]

It wasn't 10 years, but I used your Cap list to place an order for my rebuild! Thanks.