10
9. Servicing
PSU FUSE
5751
5751
6922
6922
1
9
9
9
1
4
5
2
6
7
8
3
JP6
JP6
JP1
LEFT
RIGHT
GR Adjust
Output Adjust
Zero Meter Adjust
1
4
5
2
6
7
8
3
9
A
Unity Gain Adjust
Link Balance Adjust
Chassis Ground Lift
HP SC Filter Select
KEY
VACUUM TUBES
The ELOP+ utilizes one 5751 & one 6922 per channel. The lifespan of these tubes is in the order of
5000-6000 hours, after which time the tubes should be replaced. If the ELOP+ has become noisy, this
could be related to tube wear. Consult your dealer or purchase new tubes from Manley Labs. We
supply low noise and graded quality. Simply hold the tube firmly at its base and vertically pull
upwards, freeing the tube from its socket. When inserting a new tube ensure all the pins are straight
and align with the receptacles of the tube base before pressing down firmly to locate the tube
correctly.
GROUND LIFT JUMPER
If necessary the Circuit Ground can be disconnected from the Chassis Ground. This practice is usually
required if hum-loops cannot be cured in any other way. Removing both jumpers JP6 one on each
channel will break the chassis signal ground.
HP SC FILTER SELECT
This jumper selects either a 80Hz or 150Hz High Pass Side Chain Filter. If the Jumper is set on the
two left pins leaving the right pin free 80Hz is selected (default). If the jumper is set on the two
right pins leaving the left pin free, 150 Hz is selected.
PSU FUSE
The PSU fuse is a safety fuse rated at 2A (T) 250V AC. If this fuse fails the switched-mode PSU has
suffered a catastrophic failure and it is unlikely that it can be repaired. The unit will have to be
returned for service.
W1
W2
A
A
A
Diagram 3
VT1
VT1
VT2
VT2
