Recent content by Franck 78

The 29E31S again : I had two 10n cap shorted in two weeks. And none before that. Is it a bad batch of 10n....? Evident symptom, one of the cuttoff is inoperant. zero, nada action ;) Cullprit : C934, C940 or C941 Maybe faulty : C917, C919, C921 C910 on the 12v rail. You should measure ~4k...

new tip/fix for the 29e31s schematic C422 is 5n6, (not 3n6 uncommon value) R913, R926, R940, 560 ohms 1/2w age poorly, found often 800 to 1300 ohms....

still waiting some measures

Last fault I relatively quickly found (with my schematic) -working ok in 16/24 KHz -going to protection 5 seconds after switching to 31Khz I was Q507 dead open. It caused output 6 of U971 slowly rising. But at that time, it didn't know the exact B+ to expect (I still don't), I measured 112v...

I need to be more specific on a comment from the schematic It's on the DC power , TP6 or C972 I need the exact measures for each mode (16/24/31)Khz The actual info is from MS29131 service guide. I totally forget to correct this with the functional chassis (now gone). Can someone measure it...

I recently got 3 MS9-29 for ~$100, a good deal ;) Stored on the shelf of an 'exploitant' (someone having lot of machine in cafés/restaurant) for 15 years. Recaped 2 of them, one is OK and the other one add this strange distortion: It was C955 not installed (by me). The 7812 is unable to...

2SJ142 mosfet -P, logic level, I have the info. Thank you

the meduim one, Q951. Just write what you read on it. Kxxxx Jxxxx probably Thank you

Today a contact gave me a MS9-29 auto "Bought this from Japan, working". Can you install the 'contrast enhancement' on it ? Well, working is a no go ! Missing U951 the 12v regulator Missing Q951 a mosfet that shunts resistors R968 R969 I need this mosfet ref. Or the original schematic of...

Hi, I got a PB9929 for repair. The pcb seems (or is) much simpler than MS2930 ;) Probably due to ICs doing a lot of things. So, the question is: who is in for another schematic ? Of course I need some coffee. As I won't keep the working chassis for long, I will need a dead one. Apparently...

I fixed the faulty P9929. It was fuse F803 blown by dead CP814.

Hi trashedcab, Today I got 2 PB9929, one ok, one with strange color bluring. Of course no schematic for them. Is it worth trying to make the schematic for this chassis ? Enough of them in circulation ??

thank you nem ! This makes 2 + my foldover problem, LA7832 then. https://github.com/Franck78/NANAO-MS8_29

Hello, In the schematic I made for MS8-29, I specified LA7830 for the vertical IC. I think it is a mistake, the board I used was previously 'repaired'. One user said to me his board have a LA7832. Need more confirmation. Can some others confirm they have LA7832 (or even LA7830) please ...

Give him my mail and the link toward the schematic. https://github.com/Franck78/NANAO-MS2930