Sony Ericsson DFP-D3000 - Manual (Page 30)

6-10 DFP-3000
6.15 At this point the DFP-3000 system needs only a few final adjustments. The Preset level trims
can be set according to the preferred methods of each cinema engineer. To access the trim of a
Preset from the front panel, select the Preset by pressing its button twice and then press the Down
arrow. Adjust the Master Volume control to change the preset trim in order to match the Preset to
the SDDS loudness level; when satisfied with the level, press the Up arrow to store the setting
and return to normal operation. Some may chose to adjust external non-sync distribution amplifi-
ers to achieve the desired level and leave the DFP-D3000 non-sync trim at 0.0 dB. If the screen
has additional digital formats, play a quad format feature and block the LEDs of the various
readers and use the DFP-D3000’s fallback system to automatically switch between formats,
comparing loudness by listening to the booth monitor. This allows checking the fallback wiring
as well as the preset level matching. Normally, it is best to use output trims on the other digital
players to achieve 85 dB SPL at each speaker in the same manner as was done for the SDDS
format with the DFP-D3000 (using pink noise and an SPL meter), but the Preset trims can also be
used if convenient. When making this test, blocking the DFP-R3000 reader’s LEDs will allow
you to confirm operation of the SDDS ACM (Analog Concealment Mode) fallback to optical or
other preset.
The bypass level setting is made by adjusting two trimmer potentiometers (for Lt and Rt) located
at the left of the lower circuit board inside the DFP-D3000. These are adjusted to produce the
same output level to L and R when the unit is powered Off while playing a pink noise loop
through the optical inputs. Remove two silver screws at the right of the front panel and swing it
aside to reach these two trim controls.
The single HI (hearing impaired) output level trim potentiometer is located to the right of the
bypass level trim controls and is marked HI on the circuit board. It adjusts the HI output from .7
to 7 V at its rear panel PHONES connector.
APR-34 rev 11 circuit board (lowest of 3)
APR-34 rev 12 circuit board (lowest of 3)
Lt Rt HI