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[R_J]

Can we see the pictures before you sent it to the so called "repair shop"? If the caps are for the 78m05 they are likely between 47µh and 100µf...

[R_J]

The GREEN wire coming FROM the speaker switch should be connected to B + RIGHT AND A - Right terminal so which ever terminal you connect it to, also run the (green jumper wire) so both terminals are connected together.

This also applied to the small (orange) jumper wire that connected A- Left to B - Left. Both jumper wires seem to be missing in your last picture.
In post 69 I explained what needed to be changed, move the end of the green jumper wire, that is all that needed to be done, not rewire the whole speaker terminal. The RED terminals are Positive the BLACK terminals...

[R_J]

Look at your original picture. they are NOT WIRED THE SAME all you had to do was move the green jumper wire that was soldered to the grey wire by mistake and solder it to the green wire (B + Right) and all would have been correct, but nooooo...

[R_J]

Here is a picture from the manual. See pin 4, see orange wire and where it goes. it does NOT connect to B+ RIGHT! It was originally on B + LEFT with a small ORANGE jumper wire to A - LEFT as well which was correct....

[R_J]

My condolences to the radio.

[R_J]

The original speaker jack was wired correctly other than that ONE green jumper. If you want to wire it differently that's up to you
The A and B are not wired in a row, see attached picture...

[R_J]

The small green wire connected to A - Right is correct but the other end should be connected to B + Right (green wire to the switch) NOT to the grey wire on B - Right...

[R_J]

I identified the pins for you, on your other thread, I guess you didn't believe me
See your other post for what is wired wrong on the spkr terminal

[R_J]

Your HDMI source could be sending an unsupported resolution to the tv, change the output on the source device to something the tv supports....

[R_J]

Ali express 53a3p 53 A3p New Original Imported Optocoupler Ic Chip 53a3p - Buy New Original Imported 53a3p optocoupler Chip 53a3p 53a3p Product on Alibaba.com

[R_J]

I went by the schematic, and the one giveaway was pin 3 which is not used and is not connected to anything. I am not sure how alps numbers the switches, but in this receiver, this is how they are numbered. It looks like this switch has the mounting bolt between pin 1 and 12. This switch was likely custom made for Kenwood

[R_J]

Can you see these numbers? the switch pin numbers count around the other side up to pin 12
...

[R_J]

If you click on the pictures and make them larger you will see the pin numbers I put on them. Are you using a computer or a phone? You wanted to know the pin numbers on the switch, so I numbered them and gave their destination
I used the pictures you provided, and numbers the pins as per the service manual
Pin 6, To Board 15 (Left Output) goes to the amp board, pin 15
Pin 5 goes to Left speaker "A" + positive (Red terminal)
pin 4 goes to Left speaker "B" + positive (Red terminal)
Pin 3 is not connected (n.c.)
Pin 2 goes to Right speaker...

[R_J]

The best I can make out from your pictures is the following, the numbers may be hard to see but they are there...

[R_J]

When it displays "No Model Info" do ANY of the front buttons change the display to show different model numbers?

[R_J]

This is for RX-V1077/RX-A1040 Firmware Update Version 1.98
Maybe this will work, it should reload the firmware from a usb drive...

[R_J]

It might be an optocoupler or Precision Analog Switch (as stated by one website) The ic can be ordered if you suspect it is bad.

I also found these specs but they may not be correct

Part Number	53A3P
Type	Precision Analog Switch
Supply Voltage	±5V to ±18V (Dual Supply) or 10V to 36V (Single Supply)

...

[R_J]

Yes, it is a Richtek RT8249CGQW...

[R_J]

Post a picture of the ic, what case type? if it is used to control the unit it is likely a custom programed microprocessor ic.

[R_J]

The closest image I can find is this with the similar numbers 125 003, it is listed as Ametherm Thermistor SL22-2R510, (STI: 125 003) Inrush Current Limiting
Measure the diameter of yours or provide a make and model of what it is used in...