Wei-ya M3192D

Chinese tri-sync monitor chassis found in Sammy Atomiswave SD and other early 2000's cabinets. Less reliable than the Nanao screens of old, but the final CRT chapter before everyone moved to LCD screens.

• Size: 29" Flat Tube
• Sync: 15/24/31 kHz
• Chassis: Wei-Ya C3129DB

Manuals

Wei-Ya M31 Series User Manual

Chassis Circuit Diagrams

Wei-Ya M3129DB1-72 Schematic

Wei-Ya M3129D01-7 / M3129D01-72 Schematic

Modifications

The Wei-Ya 3129 chassis is known for having quite a few quirks. Members of the community have researched and/or documented various modifications to improve performance and quality of these chassis:

• Replace the resistor at R111 with a 0.68 ohm, 1W, 350V resistor to enhance vertical overscan. (Archived from the original)
• If you're having issues with pincushion adjustment, check the capacitor at position C76 and ensure it is 1uF, 50V. Also, check continuity from this cap to the adjacent IC10; if there is no continuity, bridge IC10 and C76. (Archived from the original)
• The soldering on these chassis is generally known to be suspect at best; consider reflowing as much as you can with fresh, leaded solder.
• These chassis run hot. Very hot. Consider installing a fan to blow cool air across and over the chassis while in use.