JVC CX-710US - Search for Service Manual

[jhalphen]

Hi to all,

Help for a friend request.
Tried posting on ARF, a few days ago but no luck.
He purchased a JVC CX-710US (photo below).
this is a NTSC 5" color TV/Stereo Radio/Cassette combo of the 1980s.
USA model, 120VAC power supply.

Purchased in Germany where it's rare to find a US model.

Units works, photo shown uses the NTSC output of a jpg media player showing a french test card. Composite video is RF modulated (System M) via a Terra MT-47 all-standards RF modulator.

TV works well on RF antenna input, but shows only B&W via direct NTSC Composite input.
Chroma dot-crawl can be seen in B&W on CRT, so "something" (subcarrier) is getting through.
therefore need a SM or schematic to trace signal from baseband video input.

Note : Color CRT is an in-Line model but displays very sharp round phosphor dots akin to the JVC CX-500 Series combos.
Later JVC models (CX-610 Series) show vertically elongated phosphors with lesser resolution.

FM Stereo radio & cassette are A-OK.
Telescopic antennae broken, need to replace.

Many Thanks ! in advance for any tips, leads, SM download, etc.

Best Regards
jhalphen
Paris/France
PS : VK member ELzekio posted about this model in 2018. i sent a PM request.