Rane MP 24Z Instrucciones de operaciones descargar pdf (Pagina 9)

Manual-9

©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 TEL (425)355-6000 FAX (425)347-7757 WEB http://www.rane.com

SERVICE INFORMATION

CHANGING INTERNAL JUMPER BLOCKS

There exists several programmable options built into the

MP 24z. All are located on the Main Board which is the top-

most PCB. Access is gained by removing the seven (7) screws

from the top cover. See the main board assembly diagram

later in this manual. Dots on the circuit board indicate jumper

positions as shipped from the factory. To change: pull the

jumper block straight up, move over one pin and push back

down. That's all there is to it.

FUNCTION DEFAULT OPTION JUMPERS NOTES

Phono 1 Phono 1 Aux 1 J27, J28 a

Phono 2 Phono 2 Aux 2 J21, J22 a

Phono 3 Aux 3 Phono 3 J23, J24 b

Tape Output No Mic to Tape Mic to Tape J25, J26 c

Zone Output Post EQ w/ Mic Pre-EQ w/out Mic J18, J19 d,e

NOTES: a. Phono Input becomes Aux Input

b. Aux Input becomes Phono Input

c. DJ Mic signals will record on tape

d. DJ Mic signals will not play on Zone Output

e. Equalizer will not affect Zone Output

PHONO/LINE JUMPERS

AUX/PH 1 and AUX/PH 2 jumpers are set at the factory

for PHONO. Move each respective pair of jumpers to LINE

to convert each of these into line level inputs. The PH/AUX 3

jumpers are set at the factory for a LINE level input. Move

this pair of jumpers to PHONO to change these into phono

RIAA level inputs.

Phono 1 jumpers J27 and J28 are located behind the

PHONO 1 and LINE 1 jacks. Phono 2 jumpers J21 and J22

are located behind the PHONO 2 and PHONO 3 jacks. Phono

3 jumpers J23 and J24 are located behind the LINE 4 and

LINE 5 jacks.

TAPE OUTPUT JUMPERS

The Tape Outputs are shipped from the factory to not

include any Mic signal. Moving jumpers J25 and J26 to MIC

add Mic signal to the Tape Output. These jumpers are behind

the S12 SYSTEM MONO switch on the main circuit board.

ZONE OUTPUT JUMPERS

The Zone Outputs are shipped from the factory to include

the output of the Program Equalizer and the Mic signals.

Moving jumpers J18 and J19 to BYPASS changes the Zone

Output to pre-EQ, with no mic signals. Locate J18 and J19

behind the R81 BASS pot on the main circuit board.

REPLACING THE ACTIVE CROSSFADER

The Crossfader may be removed from the front of the

MP 24z without any disassembly of the unit itself, and may

be performed while the unit is operating with no interruption

of the audio signal.

F 60 and F 45 Fader Kits are available from your local

retailer or the factory. The kit includes full assembly includ-

ing knobs, ribbon, and face plate.

1. Remove the two (2) outer screws attaching the crossfader

assembly to the front panel.

2. Pull the Crossfader Assembly forward and unplug the

ribbon from the connector on the bottom board.

3. Install the replacement assembly by reversing the above

instructions.

See Fader Cleaning instructions on page Manual-3.

MP 24z ASSEMBLY

Later in this manual lie a rather large selection of draw-

ings to help with any service problems that may arise on the

MP 24z. Included are full schematic diagrams, a block

diagram, component placement drawings for all of the printed

circuit boards and a diagram of the overall placement of the

PCBs and their interconnects. All of the information you will

need is found in these drawings. Begin with a thorough study

of the Schematic Guide found on page Schematic-5.

Tracing signal through the MP 24z is easy if you refer to

the schematic and pay close attention to the connector and pin

information. The signal appears at pins on the top PCB as it

travels through the unit. You may use these as well as the pins

on the ICs to make your troubleshooting safari easier.

It may be necessary in some cases to remove the chassis to

access internal components. To accomplish this in a manner

that will make it possible to reconstruct the unit once you are

finished fixing it, please follow these simple directions:

1. Remove the three (3) philips-head screws on each side of

the front panel.

2. Remove the fourteen (14) nuts from the various ¼"

connectors on the rear panel.

3. Remove the five (5) philips-head screws holding the RCA

connector assemblies and the one securing the bracket in

the center area of the rear panel (near LIGHT OUTPUT

LEVEL).

4. Remove the three (3) knobs from the rotary controls

protruding through the rear.

5. Carefully lift off the chassis, spreading it slightly so it

clears the obstructions created by the circuit boards.

If resistance is encountered, re-check for missed screws or

sticking 3-pin connectors before you take a tire iron to it. You

(and we) will be glad you did. Having successfully removed

the chassis, the PCB assemblies will be far easier to service. If

it is required to get to some of the parts on the individual

Channel PCBs, the only way to extract these is to either

remove the top or the bottom PCBs. You must first remove

the screws adjacent to each connector or they will not budge.

Once all of the connector screws are removed from the top or

bottom PCB, you should be able to remove the board.

All integrated circuits are in sockets since active compo-

nents statistically have a shorter life expectancy than their

passive cousins. Most of the ICs may be removed and

replaced without separating any of the PCBs. All it takes is a

little patience and a pair of long nose pliers with a curve at the

tip. Hang in there, you’ll get it.

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