Sharp GF-9595H Not Powering Up Right On DC

Ok,grills in,cabinets on, and Yes,it powers on but only on AC.
On batteries the tuner will turn on and change stations but no lights,no power when tape is turned on.The battery connections were somewhat corroded but I filed them so it should be getting good contact.hmmm??
But on AC it works beautifully,all lights,dial light and the sound is amazing!!!
Tape is working perfectly to,I'm really,really psyched that this has been resurrected from the dead!!! Thanks Devol-Toni for the power supply board and transformer and voltage wheel !!!!!

Now I'm wondering if my tuner AA's aren't good enough,so tomorrow I'll put new alkalines in there and see if that helps.
The batteries were good last I tested so I'll try new 10 D's also,man I'd so love to get this to power up on batteries!!!
One other noted it,switch is best for tuning on first setting? Meaning it tunes on the 5's instead of the 10's. But on that setting it tunes in strong and tuning light comes on and Stereo light to!!
A little strange as if the station is 96.9 it pulls in strongly on 96.85 but if I tune it to to 96.9 it isn't really tuned in as the stereo light and tuning light go off.
Not a big deal but on AM it doesn't tune in for USA stations.
FM,cool, I'm just ecstatic that it works so beautifully on AC!!
Now I got to get this battery connection thing or whatever is going on going!!!
Here's some photos of the resurrected Sharp GF-9595H.
Any help would be greatly appreciated,I'd love any suggestions here.
I may have to take the back off and test voltage coming from the battery compartment!

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To change a rest of the world-spec 9KHz spaced AM PLL tuner to American 10KHz spacing there's usually a jumper on the tuner board that you can remove and refit with one end of it covering a different pin. I've done this with many car radios and a couple of comms receivers that I'd bought from eBay sellers who hadn't realised how their Medium and Long bands weren't picking up more than a couple of stations from positions where the 9KHz and the 10KHz scans came together.
However, good news! Looking at the workshop repair manual for the 9595, it appears that the jumper responsible for making the change between 9 and 10KHz is hard wired and changed by a key sequence. The chip that does this is connected to pin 4 of the PLL processor, IC801, via IC901, the hex inverter. Sadly, the manual doesn't show how to do this - it's all about fixing one of these when it goes wrong - so you'd need the user instruction book (which I don't have but for sure someone will) to tell you which buttons to press and hold but it is the same tuner head between H, E and other versions and it's designed to work anywhere in the world.

Beosystem10 said:

To change a rest of the world-spec 9KHz spaced AM PLL tuner to American 10KHz spacing there's usually a jumper on the tuner board that you can remove and refit with one end of it covering a different pin. I've done this with many car radios and a couple of comms receivers that I'd bought from eBay sellers who hadn't realised how their Medium and Long bands weren't picking up more than a couple of stations from positions where the 9KHz and the 10KHz scans came together.
However, good news! Looking at the workshop repair manual for the 9595, it appears that the jumper responsible for making the change between 9 and 10KHz is hard wired and changed by a key sequence. The chip that does this is connected to pin 4 of the PLL processor, IC801, via IC901, the hex inverter. Sadly, the manual doesn't show how to do this - it's all about fixing one of these when it goes wrong - so you'd need the user instruction book (which I don't have but for sure someone will) to tell you which buttons to press and hold but it is the same tuner head between H, E and other versions and it's designed to work anywhere in the world.

Click to expand...

Wow, John is probably the only guy in the world to know this!

Nice!

James

Much as I'd love to take the credit , the manual was downloaded from HiFi Engine and all of the relevant info regarding the actual hardware is in there. It's a common issue with PLL tuners from America that have been bought by unsuspecting people in other parts of the world. It's also a licence to print money when the tuners in question have been bought cheaply from eBay, reset to suit their new location and relisted as fully working!

I'll just add a link to that workshop manual here, but what Jeff really needs to explain the required procedure is the user instructions.


View attachment hfe_sharp_optonica_gf-9595_service.pdf

Hi John,thanks so much for the info on this rare beauty.
I actually bought this from Henrytai about 6 years ago from Hong Kong. I'd love to get the owners manual and original service manual for this.
It's kind of funny as thee is a tuning de-emphasis setting in the AA battery compartment but on the 1st.setting the FM seek will stop and tune in with tuning light and stereo lights come on and it's tuned in but like I say if the station is 96.9 here it stops and locks and tunes in on 96.95, 5 5mhz.past where it's supposed to be .96.9 .
It tunes in 5mhz.increments which is fine but if I do tune it back to 96.9 it isn't tuned in with stereo light,that's where like you say it needs to be adjusted with the jumper setting for USA settings.

Now for it working on DC I just have to check my battery connectors and wires going to board and test voltage on the output of the battery compartment.Hopefully it's something simple.
I just love this very heavy rare quality Boombox.
I'm psyched as I have the 9797E and the 9797 USA version with line in to.So I now have all the digital Sharps.

Thanks so much John,I appreciate you radio genius!!

This is one of my favorite boomers, very stylish looking and kudos to you Ghettoboom767 for resurrecting it. I hope I can get around to posting mine one day.

All working now!!!'

I now have this fully working,there was a wire on one of the battery tabs that corroded off so I cleaned it up and soldered it back on and Yay!!!
Working on batteries and AC now!!!

Hi Ghettoboom, here is a scan of my user manual. Also included a cool brochure of the box. Congrats its a great box! Got a minter myself, but its missing one antenna. Hate that Enjoy

That's a great brochure! The 9595 is an unusual mix of digital tuner and mechanical tape deck - very robust combo in my opinion.
Only 12 watts RMS total but that's about average for a mid sized box.

I still want one !!!

James....

Wow! No fiddling about with jumpers needed. Excellent! Page ten in that manual gives you the simple procedure for changing the scanning stops, meaning that you can make it tune to 10KHz MW station intervals after all. That's what I call good, user-oriented design.

Yes its a great box! I really like it too. One should be careful with the tape deck tho. There is a weak gear in there. I had to replace mine shortly after I used the box. Just don't rewind to much I guess


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Michiel said:

Hi Ghettoboom, here is a scan of my user manual. Also included a cool brochure of the box. Congrats its a great box! Got a minter myself, but its missing one antenna. Hate that Enjoy

Click to expand...

Thanks so much for this,I'll download this to my laptop tonight.
I only need to change whatever is needed to make the AM change at the 10khz.settings.
Like I said FM is fine as it changes on the 5's.
It tunes in on all FM stations fine but just is getting the stations 5mhz. After the call stations here.
Thanks again!!!

Jeff, you might find that adjusting the setting will put both the MW and the FM tuning stops to a mode that's suitable for your location. If so, then the FM would fall into line too. I've worked on a few sets where that's how the jumper or key sequence has that effect and it would make sense for Sharp to comply with the same protocol in their portable as they do in their car radios. That FM scale error isn't a display issue, it actually can't tune to the exact position until the adjustment has been done.

Yes, in Europe we use 100KHz spacing between FM channels. The USA uses 200KHz. The switch will set it for the location it's used. It does also sets the clock for 24h or AM/PM. I had to set my box too. Which was kind of strange, because I'm sure it was originally sold here.

Thanks John and Michiel,You've both been so helpful here,
Yes its in 24 hour time.
Downloading the files right now.
Thanks again!!