I was given an Aiwa Z-R700 from the 1990s era to look at by someone who said the twin tape deck did not work. The whole unit unit powered up ok but there was nothing from the tape deck. I had a look and found all the belts broken, I replaced the belts and then put the tape deck back into place and it still does not work. Also when I now power up the unit all the lighting on the front is very dim and the cd player and the tuner as well as the tape deck do not work. I have checked all the connections and ribbon cables again, there are no burnt or swollen capacitors. Maybe there are capacitors on the main board with low esr, a microprocessor that's bad or even the tape deck motor may have gone bringing other components down, I just don't know. I would really appreciate if someone could help please, some ideas on which faulty components may be causing the trouble. I know it's getting on a bit from the nineties but it does look a nice clean system and they were really good in their day. Cheers, Thanks. Pecman
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Hi
I have an Aiwa AD-6900 mkII that I just replaced a couple of belts on.
I haven't used it for a couple of years due to not doing the belts but when
I put a tape in and play it ,I'm only getting output on the left channel but the VU's are the same.
Rather ,Im getting output on the right ,but it's really really low.
Anyone know what could be wrong with it?
Cheers -
I have a Quantum SuperLoader robotic tape library that uses an IBM LTO 7 tape drive which is constantly complaining that it needs cleaning. If you insert a cleaning tape, it performs the clean and resets the cleaning counter to 0 hours. It should only require cleaning every 50 or so working hours but after as little as just 1 hours use it requests cleaning. We've purchased a new cleaning tape along with new LTO backup tapes but that has not resolved the problem.
I have taken the library apart and can see no noticeable signs of dust inside. I have removed the tape drive from the... -
Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached.... -
Good day folks. Today I got something which I haven't worked on very often because they're falling out of fashion: a tape deck - sounds lame, but it's a challenge I'm willing to accept.
It's a rather basic one: no auto-reverse, though it's got Dolby on it, so I guess it's decent and worth saving.
There are 2 issues with it:
A) it takes its sweet time to finally output any sound after being powered on, despite the transport running and the LEDs coming on fine
B) the left channel is dead
A) I had a look at the schematic on page 49,... -
I've been seeing a lot of the new TVs (samsung and LG only i think) maybe 1-2 years old suffering from sudden panel death and have been over 50% successful bringing them at least most of the way back to functionality if not all the way, with the tape masking of the LVDS pins method.
add this one to the list. the issue was on the left side of the panel and i ended up blocking just 3 pins on the connector that joins the two panel boards that make up the left side of the panel (it has 4 boards total) i didnt get the picture back to 100% perfect. i spent hours fiddling with which pins to block...07-17-2023, 10:22 PM
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