Check resistance between conclusions of the forward loudspeaker of the top sound frequencies.

If resistance does not meet standard, replace the forward loudspeaker of the top sound frequencies.

Resistance: 3,2 Ohms.

Connect the battery of 1,5 V to the forward loudspeaker of the top sound frequencies and be convinced that dynamics makes a sound.

Fig. 7.84. Scheme of check of the forward loudspeaker of the top sound frequencies

If the sound is not heard, replace the forward loudspeaker of the top sound frequencies.