Measured R1 socket ④, ⑤ feet between voltage only 2.6V (normal should be 5V), described the remote receiver circuitry is not normal. R1 measured between pin and socket ⑤ ⑨ pin socket Q2 greater resistance and instability, the fault is the connection between the legs caused by resistance becomes larger. Reconnect with wire legs and Q2 R1 outlet socket ⑤ ⑨ foot fault disappears.kxxservice manual download site