Pioneer SX-1980 restoration

Does anyone got a substitute for the 667-ECQ-V1H224JL on the power amp board? Its no more available.
 
Does anyone got a substitute for the 667-ECQ-V1H224JL on the power amp board? Its no more available.
Its a polyester stacked film capacitor 0.22µF 50V, just use another brand like kemet or Wima...
 
In the photo attached there I think I can see the zener diodes 17 + 18V (yellow circle), but the zener (red circle) should actually be next to this, or am I wrong?
 

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In the photo attached there I think I can see the zener diodes 17 + 18V (yellow circle), but the zener (red circle) should actually be next to this, or am I wrong?
As far as I can tell, it is next to it?
What are you trying to work out?
 
It's a service letter mod requiring the single 32v zener to be replaced with two. A 17v and a 18v.

From a MTF post:
Here is a link that has information in Audiokarma:
http://www.audiokarma.org/forums/showthread.php?p=1182717

I hope these parts numbers from US supplier mouser.com help you find suitable replacements in your area.
these are just for the factory SX-1980

These are all the diodes, both the original part number, and a replacement with identical specifications:

D210 wz-240 >> 512-1N5252B Fairchild 24 V, 0.5W Zener diode 5 percent $0.06
D211 wz-240 >> 512-1N5252B Fairchild 24 V, 0.5W Zener diode 5 percent $0.06
D213 EQA01-35R 35 volt 5 percent 0.5 watt zener diode. replace with two diodes:

D213 >> (#1 of 2) 512-1N5247B Fairchild 17 V, 0.5W Zener diode 5 percent $0.06
D213 >> (#2 of 2) 512-1N5248B Fairchild 18 V, 0.5W Zener diode 5 percent $0.06
OR
D213 >> (#1 of 2) 512-1N4744A Fairchild 15 V, 1W Zener diode 5 percent $0.08
D213 >> (#2 of 2) 512-1N4747A Fairchild 20 V, 1W Zener diode 5 percent $0.08
I'm not sure what EchoWars recommendation is... the 0.5w vs 1w isn't clear
and I didn't find 17v 1w zeners either... so 20+15 is closest

D215 1S2473 >> 512-1N4148 Fairchild Diodes - Small Signal 100V Io/200mA $0.03
 
EDIT: YIKES THE PICTURE IS BAD!!!!!!!!!!!!!!!! THE ZENER STRING IS IN THE WRONG, D215 POSITION!!!

YELLOW circle should show D215 1s2473 (reverse polarity protection during shutdown / powerup IIRC) to 512-1n4148(iirc?)


RED circle D213 originally eqa 01-35R a 35v 1/2 watt zener diode

FACTORY CHANGED D213 from 1/2 watt 35v zener to a series string of a 17v and a 18v 1/2 watt zener.
35v zeners were pushing the technology at that time, and the replacement pairing of the 17 and 18 are
quieter and more stable even today - if you can FIND a 35v zener.
 
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If in my yellow circle the diode is the 215 why is there 2 soldered together.
Im confused, sorry if I don’t get it
D210 and 211 anyway go out due to the cs
 
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If in my yellow circle the diode is the 215 why is there 2 soldered together.
Im confused, sorry if I don’t get it
D210 and 211 anyway go out due to the cs

OOPS

Where did that picture come from (rhetorical question)?
Now I gotta weed out my pictures...


...... and... I can't find a bad one (yet)
 
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Go with the original diameter ecaps, there is no room to fit anything wider. Why make life more difficult than it already is ?
I am tired of waiting for a txturbo PS pcb (AWR-154) at >$600 USD, I started to design my own, anyone interested in one?:) Input is welcome, but I'll start a new thread if interested.
Kev, are you on a 4 day work week, with the new law in NZ?


Me , just in case...
 
A little update:
- I bought in eBay the power supply board from Mark it works perfect
- I recaped the 059 board
The Monster is playing, sounds awesome :)

Now I saw in another restoration that there were different parts used, like fine gold caps etc.
Is there a newer list of the recap, does it make sense to use fine gold?
I also saw some coupling caps been changed. Does anyone got informations what to use?
 
The last two days I was busy with the 058 board.
I change the transistors and the caps.
I put 470uF in for the 34V.
The other caps I used fine gold Nichicon.
I also cleaned the switches cause there were problems.

Now it sounds very good, except one thing:
When I touch the 50Hz tone control knob it makes a scratchy noise.
I have no clue what could happen?
 

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The tone switch I think was on, but it’s not when I turn the knob, just from touching it. It scratches even when volume is on zero
 
Is the tone control assy mounted/fastened in the chassis? The control shafts need to be grounded thru the chassis or they will pick up noise.
 
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