Dolby Laboratories CP500-300 Installation Manual download pdf (Page 64)

Action

Indication

Step

No.

5-46

B-Chain Alignment Procedures

NORMAL BYPASS

bypass

(switch behind panel)

g. Adjustment of Bypass Gain

Dolby

15V

24V

gain

bypass

status

supply

power

Cat. No.

249

xx dBC

-3 dB

yy dBC

FROM

➝

B-Chain Alignment Procedures

Notes

5-47

g. Adjustment of Bypass Gain

Place the NORMAL/BYPASS switch in the BYPASS position.

Adjust the bypass gain control on the Cat. No. 249 Power Supply card for a SPL 3 dB less

than you noted in the NORMAL mode at Step 4. If this level cannot be achieved via the

control, disconnect the CP65 from AC power, remove the Cat. No. 249 card, switch the

J1 jumper from the Low to the Hi position, reinstall the Cat. No. 249 card, reconnect AC

power to the CP65, and readjust the SPL to the required level.

CAT. NO. 249

Low

High

At this point, you can disconnect all external equipment from the CP65. The remainder

of the alignment procedure does not require measuring instruments.

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Dolby Laboratories CP500-300 Installation Manual Page 64