Zenith B27A74R service codes or manual needed

[Duane]

My brother's in-laws picked up a Zenith B27A74R tv at a garage sale recently. The set's picture quality is ok, nothing to brag about, but while watching black and white shows (they'e big fans of the Honeymooners), they thought the shows looked wrong to them. I was asked to look at it and it does have a red push to the grey scale. Doesn't matter whick color temp is chosen, they both are reddish.

I have an old Sencore color analyzer and was going to get into the service mode and get the grey scale as close to correct, but the codes I have do not access any video parameters. What I get is just 5 parameters (h-pos,v-pos and 3 that have no usefullness for video adjustments).

The question I have is this. Does anyone know if there's another step in the service mode to bring up another page that would allow for drive and cut adjustments ? The sequence I found for service mode access is this:

TV on
press menu button until the menu screen dissapears
press 9,8,7,6,enter on remote within 2 seconds

the screen shows a service mode screen.

The up,down buttons move between params
the left,right buttons change the data values

Again, this is as far as I can get. Is there another step to access another page?

I found a picture of their set. Hopefully it shows up.