Signal Ground Lift Jumper - Crest Audio CKS Series Owner's Manual

Input Module Replacement Diagram - NC-IPN.
Designed & manufactured in the USA by:
Crest Audio Inc.
100 Eisenhower Dr.
WIRING
E USED
Paramus, New Jersey 07652 USA
ut
Model Output Power Model Output Power
Name @70.7V Name @8 /Ch.
CKS 100 50W
CKV 100 50W
CKS 200 100W
CKV 200 100W
CKS 400 200W
CKV 400 200W
CKS 800 400W
CKV 800 400W
CKS 800-2 400W
CKV 1600 800W
CKS 1200-2 600W
CKV 2400 1200W
CKS 1600-2 800W
Network
Address
Data
0 0
8 8
+ – + –
Hi Lo
Ribbon Cable from
Network Module, if fitted
Replacing or Installing a Network Module.
The amplifier must be switched off and unplugged from the AC
mains supply before this operation is undertaken. Four Phillips head
screws secure the module to the chassis. The module is connected
electrically to the amplifier via multi-pin ribbon cables. Unplugging
the module from the ribbon cable connectors frees the module for
removal. To insert the same or another module, simply reverse this
procedure. Note: Standard CK Power Processing amplifiers come
with a blank panel installed in the Network bay. The amplifier must
not be operated without a Network module or blank panel in place.
Network Module Installation Diagram.
CLASS 2 WIRING
MAY BE USED
Output
–
+8 to 18VDC
20 mA
A
+
+
B
NEC
CLASS 2 ONLY –
Signal
Ground
Lift
Jumper
Model
CC-STL
Designed & manufactured in the USA by:
Model
Name
CKV 100
CKV 200
CKV 400
CKV 800
CKV 1600
CKV 2400
Network
+ –
Page 8
Model
NC-NXS
SEE INSTRUCTION MANUAL
N-Coder
Data
Port
Input B
Input A
+ +
– –
Model
NC-IPN
N-Coder
Data
Port
Error
AES/EBU
In
Crest Audio Inc.
100 Eisenhower Dr.
Paramus, New Jersey 07652 USA
Output Power Model Output Power
@70.7V Name @8 /Ch.
CKS 100 50W
50W
CKS 200 100W
100W
CKS 400 200W
200W
CKS 800 400W
400W
CKS 800-2 400W
800W
600W
CKS 1200-2
1200W CKS 1600-2
800W
Address Model
NC-NXS
Data
0 0
8 8
+ –
Hi Lo
MODULE IS NOT REMOVABLE. DO NOT
ATTEMPT TO REPLACE OR REMOVE A
This module can only be serviced by a Crest Audio-certified
service technician. Please consult your dealer or Crest Audio
representative for assistance. User-inflicted damage to this
Level 4 5
6
A 3
7
2
8
1 module will invalidate your warranty.
9
0
10
5
Level 4
6
B 3
7
2
8
1
9
0
10

Signal Ground Lift Jumper.

Whenever possible, the signal source equipment should share the
same AC ground as the amplifier(s). In some cases, however, partic-
ularly if an amplifier is being installed in an existing system, this
may result in a ground loop. If this happens, remove the factory-
installed ground lift jumper from the output barrier strip (located on
the Power/Output module), which electrically connects the signal
ground to the chassis/AC ground. If the jumper is removed, the sig-
nal ground is lifted and is clamped to ± 0.6V. Don't remove the
jumper if the amplifier and the signal source equipment are not on
the same AC ground!
In a properly designed system (for safety and to minimize noise), the
amplifier should receive its ground from the AC line cord. The shield
on a balanced input line should be grounded at one end only (usually
the sending end), and it must never be relied on to supply AC ground
SEE INSTRUCTION M
to the amplifier.
+8 to 18VDC
240 mA
Inpu
+
–
In
Out
Com
NEC
CLASS 2 ONLY
Model
CC-STL
IMPORTANT:
THE POWER/OUTPUT
POWER/OUTPUT MODULE !
A
+
+
B
–
Signal
Ground
Lift
Jumper
Crest Audio CK Power Processing Amplifiers
Signal Ground
Lift Jumper