Summary

A rather unique product, the TM-2001U is essentially a consumer TV (likely a clone of the AV-20220) that was marketed as a commercial video monitor. The only difference from the consumer version appears to be that the rear composite video input does not have a termination resistor, and is meant to be used with a "BNC Connector Box" that clips on the back of the set and allows for passthrough of the video signal.

Literature

• User Manual
• Schematics
• Sales Brochure

Notes

From at least 1998, all of JVC's 20" curved TVs (including the 20" D Series models) used the same tube and yoke. This makes swapping tubes between them very easy.

This TV can be modded for RGB. However, due to the design of the jungle chip, brightness and contrast cannot be adjusted via the user menu, making it less functional than other models.

Enabling the rear A/V Input

This TV has an unterminated rear input. It was meant to be used with a BNC adapter box, which clips on to the back of the TV and contains a set of auto-terminating BNC jacks.

Without this adapter, connecting a video source directly results in an overly bright image. The front input (Video 2) will still work as normal, however.

To use the rear video input, the TV can be modified to add a 75 ohm termination resistor. After this is done, it will function the same as any JVC consumer TV.

This can be done in one of two ways. R251 can be populated with a 75 ohm SMT resistor (located on the bottom of the PCB under the A/V input). Or, if you'd rather use through hole components, the resistor can be installed between pins 1 and 3 of J002.