Retroman839
Senior Member
Partial vertical collaps 
R33 reads good at 2.2kh
R33 reads good at 2.2kh
Ms8 26su
- Thread starter Retroman839
- Start date
Retroman839
Senior Member
Similair little resister infront of the zenner zd431
Reads 12.44 K ohms. ?
That resister Going out of range ?
Can I read q402 and q401
In circuit ?
Any schimatic for this chasis ?
I cannot see a ident for this resister in the silk screen
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Retroman839
Senior Member
Retroman839
Senior Member
Reflowed will try it on the tube like this
One or two places did look like it was short on solder , some ringing or cracks
Retroman839
Senior Member
Kneck socket just hanging on by about 3 pins ! Rest are just floating
Retroman839
Senior Member
Retroman839
Senior Member
It was same
Retroman839
Senior Member
Removing vertical ic
And this bug is just walking round the chassis
Retroman839
Senior Member
Drill it
Out ?
Retroman839
Senior Member
thegreathopper
Active member
Could do or grip with a pair of pliers.
thegreathopper
Active member
Beat me to it!
Retroman839
Senior Member
How ..
It ain’t turning and I can’t fit pliers in that space !
Retroman839
Senior Member
I have a right angled ratchet
But the ps1 and ps2
And ph 1&2 are just wanting to round it out !
But the ps1 and ps2
And ph 1&2 are just wanting to round it out !
Retroman839
Senior Member
Ok got 1 out nicely
All solder was removed from the through whole it just lifted out
1. 2SD1138 / D1138 NPN Power Transistor
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Retroman839
Senior Member
View attachment 66962
Ok got 1 out nicely
All solder was removed from the through whole it just lifted …
The other screw has done me!
I need to have a think about it ..
Ok got 1 out nicely
All solder was removed from the through whole it just lifted …
The other screw has done me!
I need to have a think about it ..
Retroman839
Senior Member
Base to emitter voltage drop ..
Should be 0.5-0.7v
Is that reading of 674
0.674 v ?
I like this multi meter
That transistor q402 passed both ways round , all tests
It’s good .
Thermal paste applied it’s back on the chassis
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Retroman839
Senior Member
Second screws off 👍
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Retroman839
Senior Member
Good voltage drop
No shorts ?
Can it just be c433 ?
Isn’t that supposed to be 50 v ?
Not according to the other chassis
Right check r433 on the good chasiss
It was same 2.2kohm
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Retroman839
Senior Member
Check little tantalum
Tantilum
12.38on good chasiss
8.61 on bad chasiss ?
33 percent drop
D432 good chasiss 14.32
Bad chasiss. 16.40
C433 Good chasis 12.50 kh
Bad chassis 14.29
R436 good chassis 9,8
Bad. Chassis 8.9
C437 good chasiss 8.53
Bad chassi 4.20
Tantilum
12.38on good chasiss
8.61 on bad chasiss ?
33 percent drop
D432 good chasiss 14.32
Bad chasiss. 16.40
C433 Good chasis 12.50 kh
Bad chassis 14.29
R436 good chassis 9,8
Bad. Chassis 8.9
C437 good chasiss 8.53
Bad chassi 4.20
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