Bose LIFESTYLE 550 Servis Kılavuzu - Sayfa 14

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7.3 Reference a dB meter to the output.

7.4 Check the response using the chart

below.

901

Response Chart

Frequency

Output

40Hz

+16dB

250Hz

0dB

Reference

700Hz

-7.0dB

10kHz

+16dB

14kHz

+21dB

TEST PROCEDURES

Tolerence

±2dB

----

±2dB

Figure 3. Amp Adjustment Location

8. Amplifier Adjustment Procedure

Note: Preheat the unit for about 20 minutes

prior to performing the following procedure.

8.1 Connect a DC voltmeter to the test

points TP 501-502 (across R536) for the

right channel and at TP 503-504 (across

R537) for the left channel see Figure3. for

the TP locations.

8.2 Connect the output to an 8 ohm load,

volume set to the minimum position, with no

signal applied.

8.3 Adjust VR452 for the right channel and

VR451 for the left channel to a setting of

7mV at the test points.