Test E: The Subwoofer Is Inoperative (CD6 Only)

PINPOINT TEST E: THE SUBWOOFER IS INOPERATIVE (CD6 ONLY)

E1-E2:

E2-E5:

E5-E7:

E7 Continued:

Normal Operation
The subwoofer speakers are powered from a subwoofer amplifier. The ENABLE input circuit, 168 (RD/BK), carries out 2 functions: to turn on the subwoofer amplifier, and to indicate to the audio unit when the subwoofer output distortion signal reaches a damaging level. The audio unit then reduces the audio output signal to the subwoofer amplifier.

Possible Causes
- circuit 37 (YE) open
- circuit 167 (BN/OG) open or short to ground
- circuit 168 (RD/BK) open
- circuit 172 (LB/RD) open or short to ground
- circuit 1204 (BK/OG) open
- subwoofer amplifier
- subwoofer
- audio unit