Insertion Of The Tubes; Operation Of The Sfd-2 Mkii Digital Processor; Tube Pin Alignment With The Socket - Sonic Frontiers SFD-2 MK-II Owner's Manual

INSERTION OF THE TUBES

The SFD-2 MKII comes with two 6922 (6DJ8-type) tubes, indi-
vidually boxed and bagged along with a cotton glove, screw-
driver, and screws for fastening the SFD-2 MKII cover. If
desired, replacement of these tubes may be done to suit the lis-
tener's preference. The following tube types will work under the
same technical parameters as the 6922 and require no circuit-
ry modification to function:
• 7308/E188CC • 6DJ8/ECC88 • E88CC
Please read and follow these instructions carefully for initial
tube insertion or tube replacement.
1. Be sure that the AC DETACHABLE POWER CORD IS
D I S C O N N E C T E D from the SFD-2 MKII before removing the
chassis cover.
2. Using a Phillips screwdriver, remove the cover of the SFD-2
MKII. For convenience, only two of the screws are fastened.
3. When handling the tubes, it is recommended that the cotton
gloves provided be worn to prevent skin oils from depositing
on the glass surface and possibly causing the tube to become
prematurely "gassy", thereby shortening the tube's useful oper-
ating life.
4. Take a tube and inspect the pins, noting the larger space
between two of the pins. This space will align with the same
larger space between two of the pin holes on the socket. Insert
the tubes into the tube sockets, making sure all pins and pin
holes are aligned (see Figure 2). Do not force the tube into the
socket. "Rock" the tube gently while pushing slowly until the
tube is firmly seated.
5. Replace the cover and fasten it with the screws provided.
The SFD-2 MKII is now ready for operation.
Figure 2 - Tube pin alignment with the socket.
W A R N I N G
D I S C O N N E C T the AC Detachable Power Cord from the SFD-2
MKII and wait 5 minutes for the capacitance to discharge
b e f o r e removing the chassis cover.
Note the larger space
between two of the pins and
holes for proper alignment
of tube and socket.

OPERATION OF THE SFD-2 MKII DIGITAL PROCESSOR

Before plugging in the SFD-2 MKII, check to see that the unit is con-
figured for the correct AC line voltage for country of use. The operat-
ing AC line voltage is indicated on the side of the shipping box. If
the SFD-2 MKII Digital Processor is set incorrectly for the country in
which it is to be operated, contact the dealer or distributor in your
area. If the unit is configured properly, continue with operation.
Connect the Detachable Power Cord to the SFD-2 MKII chassis (see
Figure 1) and plug your SFD-2 MKII into the AC power source.
Up to five digital sources or cables may be connected to the appro-
priate input connectors on the rear panel (I,J,K,L,&M) using an ST
(Glass Fibre) cable, Toslink (Plastic Fibre), BNC Coaxial cable, RCA
Coaxial cable and an AES/EBU XLR cable. If a digital recording
device is being implemented, an RCA Coaxial cable may be used
for this connection from the Digital Out (H) (see Figure 3).
Connect the left and right channel balanced XLR audio outputs (if
the existing amplification system is balanced) or the left and right
channel RCA coaxial (single-ended) into the corresponding left
and right channel line level audio inputs of the system's preampli-
fier, control amplifier, integrated amplifier or receiver (see Figure 4).
Figure 3- The digital source(s) output connections to the SFD-2
MKII digital inputs. Up to five digital sources may be connected to
the SFD-2 MKII Digital Processor via ST Glass Optical, Toslink
Optical, Coaxial BNC, Coaxial RCA and AES/EBU XLR intercon-
nect. A digital recording devices such as a DAT or CD-R may be
connected via the coaxial RCA digital out connector.