I forgot to add that I am unaware of any manuals that can be opened online. I usually have to buy them from manual sellers. I can however photograph portions of the manual and send them to you.
Sorry for the tardy reply, but I was tired out yesterday, after moving mountains of snow from Wednesday's blizzard in bone chilling wind chills, on the old tractor.
I have been pondering your problem. Only fractions of a degree of head misalignment change the performance drastically, let alone two degrees.
However without the manual and pictures, I don't think I can provide you sensible help.
As you can probably tell I'm not a fan of Far Eastern tape machines. I have found them much harder to work on that European and US machines, and not provide comparable audio fidelity, nothing like.
It was the introduction of Far Eastern consumer electronics, the presaged the decline of the West.
So many fine firms, that made such beautiful gear were put out of business.
In the tape arena the destruction of Brenell Engineering, Ferrograph, Vortexion, Ampex and Clark and Smith I have always held against their low price point mentality.
Before the onslaught, Ferrograph made wonderful machines. Built like a battleship, theirs ads said, and they were. Then they had to try and meet the price points of the Far eastern onslaught. Trouble is if you are known as the battleship brand, and then the build quality goes down, people expect it of the insurgent. However the consumer expected the battleship at the Far Eastern prices.
Every time I see posts like best receiver for under $300, or best sub under $200, I cringe every time.
I do have a fax machine here at Benedict, but it does not have dedicated line, so have have to set it to receive faxes when I know when is coming.
If you PM me we can arrange to have you fax the relevant parts of your service manual.
I leave for our Eagan home tomorrow, and I will be back in Benedict Tuesday.