This phenomenon indicates that insufficient motivation, V401, T401 measurement voltage are normal, try substitution V40l (C2482), line driver transformer, invalid row packs, later analyses, incentives and sound relationship and disconnected after listening to audio transistors, everything is normal. Problems listening to audio on the control circuit, in roads found R975 (68k) up to 200 kΩ, swapping new normal.

A "free" feature "a"-type machine and prototype aircraft T2979A circuit is basically the same, increased only by "free" control function, the three types of control are: 1. Standby: N601 ⑥ feet low potential, sadly, low voltage; 2. Powered: N601, four foot high potential, sadly feet high; 3. Free State: N601 ⑥ high potential, sadly low potential, N403 ③ foot output +5V output +9V,N404 ③ feet, small signal processing circuits are working correctly before, switching power supply +26V power supply sound function, normally, only the VD955 deadline, V964, saturated hydraulic conductivity, and line signal short to ground, lines/scan stopped working. Picture tube "black screen" sound normal.