Marantz 1030

[speedycoolda]

Please be kind its taken me ages if you see something wrong please tell I've changed the 1N60s for 4x 1N60p I think that will be ok also I've set the 100k half way and the 500ohm to zero is that the safest for start up, All D315D have been replaced for MJE15032G I hope the pictures are ok thanks,
https://uk.farnell.com/onsemi/mje15032g/transistor-npn-to-220/dp/9556621

 

[speedycoolda]

this is the new MJE15032G Marantz 1030

 

[dankik]

Why does it look like some of your electrolytics are rotated 90 deg. from the board holes? (yellow arrows)
Are the two green electrolytics bipolar caps? (red arrows) I don't see a negative line.
You will need to provide your other transistor substitutions if you want me to check the leads.
I will assume that your resistors are correct and I can't read the cap values so I can't check them for correctness.

 

[speedycoolda]

Hi sorry
C701 C702 1uf 50v Nichicon FW(M)
C703 C704 330uf 63v Panasonic FC
C711 C712 10uf 50v Rubycon
C707 C708 47uf 63v Panasonic FC
C709 C710 47uf 50v Nichicon Muse BP
C715 C716 100uf 63v Panasonic FC
C717 C718 22uf 100v Panasonic FC
C725 C726 0.1uf 160v AC 250v DC VISHAY MKT1813410255G
R747 R750 0.5ohm 3w 5% Vishay Axial Flame Retardant Coating, Pulse Withstanding, Safety Wirewound
H701 H702 KSC945CYTA ONSEMI
H703 H704 KSC2383YTA ONSEMI
H705 H706 KSC945CYTA ONSEMI
H707 H708 2N3906TA
H709 H710 TTC004BQ-ND NPN
H711 H712 TTA004B,Q PNP
H715 H718 1N60P Diodes
Also I didn't know C707 C708 is the same as the C709 C710 so I will replace them for the Nichicon Muse BP
I will try to take better pictures also the two Rubycon black capacitors in last picture they where the wrong value thanks for looking David

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[dankik]

See red arrows for comments:

1. C701/C702, schematic shows 0.47uF but you installed 1uF
2. C711/C712, why does the cap look like it is rotated 90 deg, the + doesn't line up with the board?
3. C709/C710, why did you install bipolar caps?
4. H707/H708, 2N3906 leads are EBC but the original is ECB. Please check transistor pinout and board holes.

 

[speedycoolda]

Its good to get a good set of eyes

1. C701/C702, schematic shows 0.47uF but you installed 1uF (you are so correct thank you I'm changing it now )
2. C711/C712, why does the cap look like it is rotated 90 deg, the + doesn't line up with the board
3. (Hi because the board is EBC & the TTA004B,Q is ECB so I've put pin 1 E pin 2 C pin 3 B so they match the board layout I just looked again lol)
4. C709/C710, why did you install bipolar caps ( to be honest I had 20 of them i just thought they where good but any feedback would be good)
5. H707/H708, 2N3906 leads are EBC but the original is ECB. Please check transistor pinout and board holes.
6. (Hi the center base leg I made a L shape & insulated the the E & C leg so they wouldn't short)

 

[dankik]

You should be OK using bipolar there, you just don't want to use them in the power supply.

 

[speedycoolda]

To be honest I'm going to put a polar Panasonic FC there I've got some I just liked the green lol, & yes the power supply I used all Panasonic I've set the 100k to half way and the 500ohm to zero can i ask I'm going to use my dim bulb tester any advice would be helpful thanks for everything you have helped me with David

 

[dankik]

Good idea to put it on a DBT, just in case of a board short. Since the 1030 is low power, a 100W or 60W incandescent bulb should be OK.

 

[speedycoolda]

Ok will do I've got 2x 60w bulbs so I can use 1 or 2 I've got other things to start so need to get this playing I'm subscribing the end of the month as the site and you have helped me so much thanks again David

 

[speedycoolda]

Hi DanKiK
Could I ask another question I've set the 100k trimer pots to 50% and they are both reading perfect but the 500ohm I've set to 0 ohms when the 500 ohm trimers are soldered to the board the left side is reading 0 ohms & the right side is 130ohms am I doing something wrong as when the trimmer pots are out of the board both sides measure the same also I thought that on start up for the first time both 100k & the 500 ohm should be set half way any help would be appreciated thanks David

 

[dankik]

Here is maybe what is going on.
The schematic of the VR shown below is typical of your Bourns variable resistors. Pins 1 and 3 are the ends of the resistor and Pin 2 is the wiper.

• I took your photo and labeled the pins for reference to the schematic.
• Now if you look at the board layout (check your board to see if it looks the same) and I flipped the artwork to match the top side of the board.
• R723 and R729, pins 2 and 3 are connected together on the board.
• R724 and R730, pins 1 and 2 are connected together on the board.
• This means that the left and right sides of the board are wired opposite.
• CW on the left side = CCW on the R side and vice versa.
• So when you set the control fully CCW to get 0 Ohms on the L side you are setting it to full resistance on the R side (opposite direction).
• Try turning one side in the opposite direction and see if they match.
• For the case of the 100k trimmer, you set it exactly in the center so both sides will match.

Does this make sense?
You can either leave it alone knowing you need to turn it in the opposite direction, or unsolder the two VRs on one side and turn them over so they are mounted upside down (reversing pins 1 and 3).

 

[speedycoolda]

Hi thanks for the quick reply I hope these are ok

 

[dankik]

See my edited post above.

 

[speedycoolda]

ok will do I will have a go now thanks David

 

[speedycoolda]

Me again you was so right here I go again 100k set to 50% no problem the 500ohm this says they need to be set half way this is my first time setting up I'm going to use my DBT but when there out of the board i cand set them half way i cand set them to 487ohms but as soon as there soldered on the board when both set at 487ohms they both read 130.1 ohms is this normal because of other things on the Circuit or am i just stupid P.S don't answer that lol I just cant wait to see this back to life

 

[dankik]

There is a diode H713 connected directly across R729. Same with diode H714 across R730.
The diode conducts when voltage is applied in one direction (forward bias) and is open in the other direction (reverse bias).
When you measure resistance, a small voltage is applied across the resistor from the multimeter. I think depending on which lead you connect to each end, the resistance reading will be different because of the diode in parallel with the resistor.
Try to measure the resistance with the black/red leads one way across R729, then reverse the leads and see what you get.

 

[speedycoolda]

Thank you I will give it a go life saver

 

[speedycoolda]

Hi after checking H713 to R729 both ways reads 130.5 from pin 2 & 3 to the one side of the diode pin 1 to the other side reads 000.1 & H714 to R730 both ways reads 130.8 from pin 1 & 2 to the one side of the diode and pin 3 to the other side 000.1 as I've been looking through the post i notice as well that I have changed my 1N60 for new 1N60P but it says i should have used 1N4148 or 1N4448 do you recommend this also H713 & H714 as there as old as can be thanks David

 

[kwayde]

Hi after checking H713 to R729 both ways reads 130.5 from pin 2 & 3 to the one side of the diode pin 1 to the other side reads 000.1 & H714 to R730 both ways reads 130.8 from pin 1 & 2 to the one side of the diode and pin 3 to the other side 000.1 as I've been looking through the post i notice as well that I have changed my 1N60 for new 1N60P but it says i should have used 1N4148 or 1N4448 do you recommend this also H713 & H714 as there as old as can be thanks David

I've tried reading this numerous times and I can't figure it out.

Try using periods and maybe separate each measurement.