Excellent video, thank you . I own a frustrating Technics SH-GE70 equalizer . Fundamentally it works great! However visually ? the left and right digital display is completely out , as the indicator lights...no lights at all. I will check for looseness or cracks as your video demonstrated.If you can shed any light on this issue, i would greatly appreciate it ..thnx again.
Hi Chris, thanks. It sounds very much like there is no power getting to the front PCB. All you can do is a close visual inspection, preferably with a magnifier and very gently press on the displays to see if there are any cracked solder joints as there were on mine. Good luck.
Ya know them red plastic display covers mines like bowing out in the middle can I take it off from the outside without opening it up and re glue it back Thanks Mike
Thank you for your video.. i have one 110 v. And the transformer was burned by 220 v. Can you please determine transformer outpots volts.. with thanks.
Glad you found it useful. I don't know why they designed the 5V circuit the way they did, it's fairly crude. However, i've been using mine regularly since i repaired it and it's been working fine.
I had to put a much lower value resistor in to get a 5V output. I used a resistance box and finally settled on 420 Ohms. I may well change the regulator one day or, as you imply, a modern variant of the whole 5V supply. Anyway thanks for taking the trouble to post as I was sitting on this repair and your video came through just at the right time!
Hello, you will have knowledge of the values and measurements of the equalizer slider of this model, I have the sh-d5000 and it is the same as the sh-e60. thanks for answering.
37 volts? Is that right? I've replaced my caps, still nothing, reflowed joins to the regs, still nothing. Faint display, eq light flashes once then goes out. I checked voltages and got 38 volts, i thought that was high? Maybe it's that resistor? I was about the throw it out, is there any equivalents to the 3 regs on the power supply? Thanks mate
It's been 6 years since I worked on this but as far as I can remember, yes, the AC voltage from the transformer was 37 volts. The resistor on the 5 volt regulator seems to be a common problem. I'm not sure what the power transistors were as I didn't need to replace them. The regulator was a 7805 I think, these are fairly common.
@@RetroSteamTech Thanks mate, I'm pretty sure i put that in it and it got very hot. Thing i don't understand is the resistor i removed went YELLOW VIOLET BLACK RED THEN WHITE?
I have a Kenwood KE 7090 Graphic Equalizer worked fine still sort of works but I've noticed when the unit is in standby mode the display is now displaying red horizontal lines which never appeared before, any help would be much appreciated 👍
@@RetroSteamTech Thanks for your reply, I've reflowed all the joints on the display board and checked every solder joint for any cracks and im still getting the same results, which capacitor would be the culprit? I did recap the power board and the display board with top quality caps last year, would it be on the display board or the power board? Cheers 👍
@@RetroSteamTech I did purchase a second Ke-7090 because some of the pads were damaged, well when I desoldered the new caps off the damaged board and swapped the old caps on the undamaged board I had a hard time getting the new caps off, and they did get very hot, could this be the issue? Could I have burnt out the caps? I mean it worked for a bit then it gradually started failing, or could it be a resistor or another component? Thanks for your help by the way, not many people take the time to respond 👍
@@MrSh4W Excessive heat will certainly damage capacitors. The service manual for the KE-7090 is available online, might be worth downloading it. It will contain schematics and PCB layouts. You would be able to replace the capacitors with new ones rather than ones taken from another board.
I have a similar eq SH-D5000 Equalizer keeps going on and off after every 30sec power seems ok bt the equalizer indicator flicks on and off everytime it does that pliz help
It sounds like something in the circuit is heating up then cooling down. I would look over the PCBs with a magnifier to see if there are any suspect solder joints.
Hi.i have the technics SH E85 but the displays do not come on.im getting power because i can listen through it.ive checked all fuses and played with all the caps.any ideas.
Hi, i would suspect a bad solder joint on the display board. Have a look at the display board very closely with a bench magnifier or ordinary magnifying glass.
Hi. I'm not an expert on vfd displays but given their age I would suspect capacitors in the power supply circuit. Bad capacitors are quite often the root cause of problems with old electronic circuitry.
Excellent video, thank you . I own a frustrating Technics SH-GE70 equalizer . Fundamentally it works great! However visually ? the left and right digital display is completely out , as the indicator lights...no lights at all. I will check for looseness or cracks as your video demonstrated.If you can shed any light on this issue, i would greatly appreciate it ..thnx again.
Hi Chris, thanks. It sounds very much like there is no power getting to the front PCB. All you can do is a close visual inspection, preferably with a magnifier and very gently press on the displays to see if there are any cracked solder joints as there were on mine. Good luck.
@@RetroSteamTech Shall do ! I never thought to press on the display and check for cracks thanks again..cheers from Canada .
Ya know them red plastic display covers mines like bowing out in the middle can I take it off from the outside without opening it up and re glue it back
Thanks
Mike
I'm fairly certain that to get at the display covers you will have to remove the front panel PCB from the inside.
Thank you for your video.. i have one 110 v. And the transformer was burned by 220 v. Can you please determine transformer outpots volts.. with thanks.
Thanks for posting this. I had the same problem with the resistor feeding the 5V regulator. It has overheated the same as yours
Glad you found it useful. I don't know why they designed the 5V circuit the way they did, it's fairly crude. However, i've been using mine regularly since i repaired it and it's been working fine.
I had to put a much lower value resistor in to get a 5V output. I used a resistance box and finally settled on 420 Ohms. I may well change the regulator one day or, as you imply, a modern variant of the whole 5V supply. Anyway thanks for taking the trouble to post as I was sitting on this repair and your video came through just at the right time!
The PCB looks the same with that of a sh-d5000 graphic equalizer that I have. What zener diodes did you use. Mine keeps on fraying them.
The only component that I changed was the input resistor on the 5V regulator, the zener diode was fine.
@@RetroSteamTech any ideas on how to sort out my equalizer it keeps on fraying the two in series zener diodes which connect to the 5 volt regulator
@@davidlunda3937 You might want to check the same resistor that I had to replace on mine.
Hello, you will have knowledge of the values and measurements of the equalizer slider of this model, I have the sh-d5000 and it is the same as the sh-e60. thanks for answering.
Hi. I don't know the value of the potentiometers used for the sliders. Try having a look online for a service manual.
37 volts? Is that right? I've replaced my caps, still nothing, reflowed joins to the regs, still nothing. Faint display, eq light flashes once then goes out. I checked voltages and got 38 volts, i thought that was high? Maybe it's that resistor? I was about the throw it out, is there any equivalents to the 3 regs on the power supply?
Thanks mate
It's been 6 years since I worked on this but as far as I can remember, yes, the AC voltage from the transformer was 37 volts. The resistor on the 5 volt regulator seems to be a common problem. I'm not sure what the power transistors were as I didn't need to replace them. The regulator was a 7805 I think, these are fairly common.
@@RetroSteamTech Thank you for the reply! I'll look into it thanks again
Did you say 470 ohms or 47k ohms?
@@SassyXR6007 It was 470 ohms.
@@RetroSteamTech Thanks mate, I'm pretty sure i put that in it and it got very hot. Thing i don't understand is the resistor i removed went YELLOW VIOLET BLACK RED THEN WHITE?
I have a Kenwood KE 7090 Graphic Equalizer worked fine still sort of works but I've noticed when the unit is in standby mode the display is now displaying red horizontal lines which never appeared before, any help would be much appreciated 👍
Could be a bad capacitor or joint on the display board, have a look at it under a magnifying glass.
@@RetroSteamTech Thanks for your reply, I've reflowed all the joints on the display board and checked every solder joint for any cracks and im still getting the same results, which capacitor would be the culprit? I did recap the power board and the display board with top quality caps last year, would it be on the display board or the power board? Cheers 👍
@@MrSh4W Sounds like you've done everything. I would have thought that the fault would most likely be on the display board.
@@RetroSteamTech I did purchase a second Ke-7090 because some of the pads were damaged, well when I desoldered the new caps off the damaged board and swapped the old caps on the undamaged board I had a hard time getting the new caps off, and they did get very hot, could this be the issue? Could I have burnt out the caps? I mean it worked for a bit then it gradually started failing, or could it be a resistor or another component? Thanks for your help by the way, not many people take the time to respond 👍
@@MrSh4W Excessive heat will certainly damage capacitors. The service manual for the KE-7090 is available online, might be worth downloading it. It will contain schematics and PCB layouts. You would be able to replace the capacitors with new ones rather than ones taken from another board.
Bro I got a Sh GE 77 off ebay and it doesn’t power on. Please advise what I can do. I am willing to send it to you for repair. Let me know pls.
What are the secondary voltage of the power supply of this equalizer because the power supply is burn out both primary and secondary voltage.
I have a similar eq SH-D5000 Equalizer keeps going on and off after every 30sec power seems ok bt the equalizer indicator flicks on and off everytime it does that pliz help
It sounds like something in the circuit is heating up then cooling down. I would look over the PCBs with a magnifier to see if there are any suspect solder joints.
Hi i have Technics ge90 with no sound coming out .could you help with it.
Just go through it as I did in the video.
Such a nice unit , I purchased one , did you know the same unit was sold without the metal feet , but a rubber substitute ?
They are great aren't they. Didn't know about the ones with rubber feet.
Hi.i have the technics SH E85 but the displays do not come on.im getting power because i can listen through it.ive checked all fuses and played with all the caps.any ideas.
Hi, i would suspect a bad solder joint on the display board. Have a look at the display board very closely with a bench magnifier or ordinary magnifying glass.
Retro Steam Tech thanks for the advice.
Retro Steam Tech also before the display stopped working i could only get the right side to change display modes via the button.
same eq with same fault .did you find the fault.?
How do you fix a dimmed vfd display?
Hi. I'm not an expert on vfd displays but given their age I would suspect capacitors in the power supply circuit. Bad capacitors are quite often the root cause of problems with old electronic circuitry.
You will have to replace the display.its a tube and it will dim over time.
Please can you this equalizer set SH-D5000 transformer output voltage
I don't think you can change the transformer output voltage, it's fixed on this model.
@@RetroSteamTech my transformer burn i need replace other but need output voltage
realtime troubleshooting and repair would have been nice.
he showed us the middle finger.
I've given up on my unit