Panasonic VP-5564A 40MHz Analog Oscilloscope need help repairing

[HoangLong]

Hello. I am a beginner in electronic and I recently bought my first oscilloscope for around 40$ online. Where I live 20MHz scopes usually go for >50$ so I thought I finally struck a deal after a long time searching for a reasonable priced one. The scope arrived in pretty rough shape with stains and scratches. The frame suffered some substantial warping. I opened it up, bent the frame back into shape and here are the pictures of the boards:
top view sweep and crt: https://drive.google.com/file/d/1f2u9CtpQLlLoZlZc4CKBQzAdpaBw0Tzw/view?usp=sharing
bottom view power and main: https://drive.google.com/file/d/1MKlcYHLsCgRpECMrzXc0zSBkLDXRBZM9/view?usp=sharing
side view: https://drive.google.com/file/d/18la6A0Qcj5jCSmeKxZRmdQi5SIsMVhZE/view?usp=sharing
back view: https://drive.google.com/file/d/13KIB26TSu6qpYAkWmk4uIyKEiRS0lJA7/view?usp=sharing
front view: https://drive.google.com/file/d/1yPYzW7XupwYRTHagB6jzayBBTltd6BRW/view?usp=sharing

I did a close inspection and found the boards look good with no signs of previous tampering or repairing. No cracking or physical damage. Caps look good as new. Solder joints also good. But there were soot on the board at 4 locations. Possibly due to high temperature burned the exess flux which were present on the board. Does anybody know why the soot are there? Is it related to the problem?
On case: https://drive.google.com/file/d/17uPg_KaqksqnhwTeyBRd9S8OqUw_gc_Z/view?usp=sharing
Sweep board:
1 screen illuminate drive transistor: https://drive.google.com/file/d/1jFFLxyMv--5z99mJlX-WrtM-uZG-_VAR/view?usp=sharing
2 transistor pairs near x- x+: https://drive.google.com/file/d/1lqwrv_OuXQK9rWbBFoQKW1E1jdE_mdXq/view?usp=sharing
Main board:
3 transistor near HV transformer: https://drive.google.com/file/d/1Cbvckm1XWdKnd43c95oRkFnFR4p83Bxh/view?usp=sharing
4 transistor pair near HV transformer: https://drive.google.com/file/d/1BzoajhBqM2-a7ycuEcPcn7-mhqv0MBge/view?usp=sharing

Then I powered it up. The power LED turned on but there was no trace visible no matter how I change the settings. Giving it an input still nothing. So I started measuring voltages on the CRT pins. Heres the pictures of the CRT and where its HV pins go on the "main" board: https://drive.google.com/drive/folders/1-jhaifzvQqwSmiOycKnOfj9a3lT1u0TM?usp=sharing

When I put my probes bettween pin 4 and 3, the screen flashed a slim vertical rectangular for like 0.1s. I started touching the pins repeatedly and the rectangular moves at time/div rate in a straight line even with a square wave on the input. I clipped my MM's COM to the chassis and started probing pin 4 it read -166v. I think pin 3 is the cathode with negative several thousands of volts and I don't have the tool to probe it so I moved to pin 2. The magic happened when I probe pin 2. The moment I touch it with my red probe, an audible spark arced between it and my probe. Then the CRT comes to life displaying a bright dot. The scope was in XY mode. So I changed the time/div knob and fortunately the dot traced as it should but only in a straight horizontal line. Video: https://drive.google.com/file/d/1bYcPiSPNaNvrAFMVheyLv9dN0_8ECtwl/view?usp=sharing

I continued by measuring voltages on the main board at the bottom and testing functionalities:

• Voltages

There are test points on the board with silkscreened voltage nearby. Most of the voltages were spot on with the exeption of three 11.9v/12v on top right corner looking from backside and one 148v/145v

• Focus

Barely changes anything. Dot went from a squashed vertical  to squashed horizontal. Line from kinda sharp to a little wide. Also the texture seems wierd. I never use or even see an oscilloscope upclose before so I can't tell if this is normal: https://drive.google.com/file/d/1qRCA11rYYmKxbS8-N0C7r8q3SHzEk_ps/view?usp=sharing

• Intensity

Nothing

• Rotation

Works flawlessly

• Horizontal position

Works flawlessly

• Vertical position

Doesn't work

• Signal respond

I used an alligator clip and a 1M resistor to hook CH1 to calibration stud. After changing the settings to appropriate values (0.1v/div, 1ms/div), the trace is still the  same - a horizontal line. Trying all the settings doesn't make it have any vertical deflection at all. Only horizontal deflection change correctly. Same with CH2.

• Trigger

Seems to work correctly

• time/div

works correctly

• volts/div

I can see some change in the horizontal line

• B delayed sweep

Seems to work correctly

I think the horizontal circuit works well but the vertical is damaged

CH2 knob is damaged and have problems turning. Is the attenuators behind this knob?

Heres a closeup view of the boards: https://drive.google.com/drive/folders/1WZGJJIdCsww6dBs94LbrGXHJIKFVPBNT?usp=sharing

Can I have some help please. I have searched the entire Internet for a schematic, service manual or anything. I've even asked ebay, yahoo sellers, repair services,... and got nothing. Should have research well before I made my purchase but I was too exited. Any help will be priceless for me. I have been working on this for more than 10 days now. Also if you have any advice, please say it. Thank you!

[Wallace Gasiewicz]

Finding information for most Panasonic gear is almost impossible.
Since you had some results probing the cathode ray tube itself. Maybe disconnect it and clean the pins.Clean and resolder the pins at the board also.
Also sometimes the pins themselves become disconnected. The leads out of the glass envelope are soldered to the pins and sometimes this solder becomes corroded and can be fixed by melting and removing the old solder and applying new solder to the pins. I don't know if this is the type of CRT construction you have, I did look at you pictures and I cannot tell. If you try this, it takes quite a bit of solder to fill the pins.
You can check the CRT but it requires an TV Tube tester and you have to make an adaptor to conform to the pins.Without any schematics, I fear further work is going to be hard.

Most lack of vertical is usually caused by burned out inputs, whether this is the attenuator or most likely the input transistor which is usually a FET, but yours does not even move with the vertical adjust.