Rane MP 24z, Руководство оператора, Страница: 9 / 9

Manual-
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MP 24z SERVICE INFORMATION
CHANGING INTERNAL JUMPER BLOCKS
There are 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 Phono Aux J, J a
Phono Phono Aux J, J a
Phono Aux Phono J, J b
Tape Output No Mic to Tape Mic to Tape J, J c
Zone Output Post EQ w/ Mic Pre-EQ w/out Mic J, J 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 in-
clude 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. Mov-
ing 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 full assembly kit includes knobs, ribbon, and
face plate.
1. Remove the two (2) outer screws attaching the crossfader as-
sembly 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 in-
structions.
See Fader Cleaning instructions on page Manual-3.
MP 24z ASSEMBLY
Later in this manual lie a rather large selection of drawings
to help with any service problems that may arise on the MP 24z.
Included are full schematic diagrams, a block diagram, com-
ponent 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 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 in-
formation. 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 to remove the chassis to access internal
components. To 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 protrud-
ing 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 components
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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