Mackie TH-18S Owner's Manual download pdf (Page 13)

Appendix A: Service Information

If you think your Mackie product has a problem,

please check out the following troubleshooting tips and

do your best to conﬁrm the problem. Visit the Support

section of our website (www.mackie.com/support) to

get some ideas or contact our technical support heroes.

You may ﬁnd the answer to the problem without having

to send your Mackie product away.

Troubleshooting

No Power

• Ourfavoritequestion:Isitpluggedin?

• Makesurethelinecordissecurelyseatedinthe

line cord socket and plugged all the way into the

AC outlet.

• MakesuretheACoutletislive(checkwitha

tester or lamp).

• IsthePOWERswitchintheONposition?

• IsthepowerLEDontherearpanelilluminated?

If not, make sure the AC outlet is live. If so, refer

to “No Sound” below.

• IfthepowerLEDsarenotilluminated,andyou

are certain that the AC outlet is live, it is possible

the fuse has blown.

To remove and replace the fuse:

1. Disconnect the power cord from the IEC socket.

2. Remove the fuse drawer using a small screwdriver.

It will slide all the way out.

3. Remove the fuse

and replace it with

an equivalent-type

fuse.

115 VAC unit: 6.3 amp slo-blo (T 6.3 A H 250 V)

230 VAC unit: 3.15 amp slo-blo (T 3.15 A H 250 V)

4. Replace the fuse drawer by pushing it all the way

back into the IEC socket.

If two fuses blow in a row, then something is very wrong.

Try a different outlet in a totally different location. If fuses

continue to blow, see the “Repair” section on the next page

to ﬁnd out what to do.

No Sound

• IsthepowerLEDontherearpanelilluminated?

• IstheLEVELcontrolturnedup?

• Isthesignalsourceturnedup?Makesurethe

signal level from the mixing console (or whatever

device immediately precedes the subwoofer) is

high enough to produce sound.

• Ifit’sastereopair,tryswitchingthemaround.

For example, if a left subwoofer is presumed dead,

switch the left and right cords at the subwoofers.

If the problem switches sides, it’s not the TH-18s.

It could be a bad cable, or no signal from the mixer.

Bad Sound

• Istheinputconnectorpluggedcompletelyinto

the input jack?

• Issomethingconnectedtoanoutputjack?Try

unplugging it. If the sound improves, whatever

was plugged into the output jack may have

affected the signal.

• Isitloudanddistorted?Reducethesignallevelat

the mixer.

• Ifpossible,listentothesignalsourcewith 

headphones plugged into the preamp stage. If it

sounds bad there, it’s not the subwoofer.

• Toomuchbassornotenoughbass?Move 

around the room and see if the bass response

changes. It’s possible your listening position

coincides with a room mode where the

low frequencies either become exaggerated or

nulled. If so, try using an alternate polarity switch

position, moving the subwoofers to a different

location in the room, or moving your listening

position.

FUSE

1 2 ... 8 9 10 11 12 13 14 15 16 17 18

Comments to this Manuals

No comments

Mackie TH-18S Owner's Manual Page 13

Comments to this Manuals

Related products and manuals for Audio amplifiers Mackie TH-18S