Tranor YBA-2A/B Resistor

[AMPREPAIR]

I am installing new caps and tubes in an old Tranor YBA-2A/B. While installing new capacitors, I made an odd discovery: The schematic shows a 4.7K (R19) and a 10K (R20) installed across the terminals of the 40/40/40 filter capacitor. I was surprised to discover the resistor installed at R19 has a color code of YELLOW, VIOLET, BROWN, SILVER. To me, this is a 470 ohm resistor, not a 4.7K as shown in the schematic. When measured out-of-circuit, the resistor shows 6.1K on the meter. I can understand a carbon resistor changing over time, but a 470 ohm resistor changing to 6.1K seems a bit much.

Incidentally, the resistor is in great shape without signs of being overheated. My forensic approach tells me that a red band could change to brown if subject to a lot of heat, but the resistor is in excellent condition without signs of heat and the BROWN band is consistent in color all around the resistor (the other color bands are also very vibrant and consistent).

My question is this: Should I replace R19 with a 470 resistor (as indicated by the actual part) or a 4.7K (as indicated by the schematic)? I would like to understand the best resistor to use, rather than just replacing it.

Any guidance is appreciated

[soundguruman]

The resistor you are looking at is supposed to be 4700 ohm, and it is fried. Yellow violet brown is really violet yellow red, and since the resistor overheated, the red baked and turned a toasty brown. Replace it with 2 W metal oxide power resistor...or whatever is hefty...
It is not unusual to see a difference between the schematic and the actual amp construction. But, I think the 4700 overheated and opened up to 6100.
But what made the resistor cook? Are there bad capacitors or bad tubes? That is usually what will cause a resistor to overheat and open circuit...
or over a long period of years the resistor looses it's tolerance.
This is not unusual for an old tube amp. Check all the other resistors too.