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Z4-8MK3 Installation and User Guide22

PCB jumper location and settings

The Z4MK3 and Z8MK3 have various internal jumpers, the setting of which may require alteration during installation. Note

that there are jumpers on both the motherboard and the individual zone sub-cards. The table below lists each jumper and its

purpose, together with the factory default setting. Note that options selectable by jumpers on the zone sub-board are per-zone,

and will need to be set on as many zone sub-boards as necessary.

JUMPER NAME EFFECT DEFAULT

MOTHERBOARD JUMPERS

J1 MIC 1 phantom power

OFF: MIC 1 phantom power OFF

ON: MIC 1 phantom power ON

OFF

J2 MIC 2 phantom power

OFF: MIC 2 phantom power OFF

ON: MIC 2 phantom power ON

OFF

J3 Paging Mic phantom power

OFF: paging mic phantom power OFF

ON: paging mic phantom power ON

OFF

J4 Music Mute N/O, N/C

N/O: contact closure required for muting

N/C: contact opening required for muting

N/O

ZONE SUB-BOARD JUMPERS

J1 Music source selection

SW: Follows rear panel switch

FR: Always via front panel only

J2 Line 6 priority

OFF: No priority

ON: Line 6 has VOX-triggered priority over other sources

OFF

J3 Music ducking release time

3S: 3 seconds. release time

6S: 6 seconds release time

ABSENT: 12 seconds release time

J4 Mic priority over facility input

OFF: No priority

ON: MIC 1, 2 & paging mic have VOX-triggered priority over signals at facility port

OFF

J5 Paging mic priority trigger

VOX: Paging mic signal triggers priority

SW: Contact closure at Access Port enables paging mic priority

VOX

J6 MIC 1/MIC 2 priority

OFF: No priority – mics mix with music

ON: Music ducks when mics in use

OFF

J7 Facility Port input noise gate

EN: noise gate enabled

DIS: noise gate inoperative

J8 Emergency Paging mic priority override

EN: Paging Mic always has priority over other sources during Music Mute

DIS: No priority - all mic inputs are active during Music Mute

The diagrams that follow show the locations of the internal jumpers (not to scale) on each of the board types. The jumpers have

two possible positions; the black square in the symbol indicates the default setting. If any jumpers need to be changed, turn the

Zone Mixer off and disconnect it from the mains. Undo the six screws securing the top cover of the unit and remove it. Use

a pair of small pliers to gently remove the jumpers from the PCB headers and reposition them. The jumpers on the zone sub-

boards are readily accessible from above; those on the motherboard will require long-nosed pliers. Rex the top cover using

the original screws.

The diagrams also show the locations of the socket for the optional loudspeaker EQ cards.

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