The machine started: picture of serious expansion and associated with "squeak" sound, then light and sound. TfBservice manual download site
 TfBservice manual download site
As line of expanding and accompanied by "squeak" sound, estimation is machine exists over-current protection caused by shutdown, after then disconnect manager c extremely, in a + B (113 v) of a 100 w bulb, can switch on the light bulb light up, and no longer TfBservice manual download site
 TfBservice manual download site
 TfBservice manual download site
Shutdown occurs. The fault level at the output. As line output pipe, pipe line flyback capacitor, damping are no exception, so doubt line output transformer or line with high voltage stability of the output stage is linked together (horizontal pillow school) circuit fault. Welding line output transformer, with short circuit test instrument, that was not damaged, obviously, the failure in the high voltage stability (horizontal pillow school) circuit. This machine is of high voltage circuit shown in figure, belongs to the line type deflection current control, its principle is: when the image brightness is higher, point A voltage drop in the figure to Q707 b voltage drop, conduction and increase Q702 voltage rise - conduction weakened - b Q701 b current - > c current decrease to conduction weakened, namely Q701 c and e very equivalent resistance - > branch line deflection coil impedance increase lines to reduce and avoid the deflection current amplitude expand, equivalent to reduce the output pipe line load, basic maintained A high pressure constant. When the line to the output stage of inductance coil L703 disconnect after commissioning, machine protection, no longer appear and grating. Obviously, the fault is in high voltage stabilizing circuit. Noticed that only the output stage short-circuit fault is likely to lead to excessive current fault line output stage, thus directly on the output pipe Q701 for inspection, found that has breakdown. Change after boot, fault disappear.TfBservice manual download site