Can't find datasheet, neither service manual of a CRT TV

Thread Starter

spikespiegelbebop

Joined Nov 30, 2021
89
Got myself a small crt tv for making an arcade machine, thing is that I couldn't find its service manual anywhere, and there's no model written on the TV as well.
The only thing I have is the TV chassi and the microcontroller model, but EVEN so I could not find their respective service manual and datasheet.

The chassi is:
f-74/316f
It's a Toshiba max color, 14''.

The microcontroller:
374641/ST-002

1667625399454.png

If you manage to find the microcontroller datasheet,
please tell me if it has an analog RGB In.
 
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Thread Starter

spikespiegelbebop

Joined Nov 30, 2021
89
Hey fellas, I managed to find a few things. The model label was on the board, and although I could barely read a thing (too erased), I could see that it looks like it uses the service manual TV 1480E UV5 or TV 1480E-2080E-2080M (probably this one):
1667718271999.png1667718246150.png

1667718319838.png1667718387470.png

One thing for sure is that it has a TA8718N IC, so I found its datasheet. I saw that it shas some RGB Clamp, but I couldn't identify its Blanking line and AV sync. By the way, this tv doesn't not have a physical AV In behind, but the TA8718N seems to have a sync in.

Everything is attached in this message.

Can anyone tell me if this IC has a analog RGB in with both sync and blanking line?
 

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Thread Starter

spikespiegelbebop

Joined Nov 30, 2021
89
TA8718N is receiving the microcontroller RGB signal where it's written R clamp G clamp B clamp, so RGB clamp is an input, not an output. Also, someone already told me that the service manual is using an equivalent IC for the microcontroller.
What I mean is that the video is coming out of the microcontroller and getting in the IC Jungle, but I can't identify the C-sync and the blanking line. And it's probably an analog RGB, because the TV is too old.

How about these Y-OSD and TV/VIDEO on the microcontroller? Can one of them by the C-sync.

1667804118495.png
 
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