SMART MOD IIB Installation And Service Manual Download Page 15

15

INSTALLATION & OPERATION

This trimpot is located on the lower right side of the
Format Card. The four screws holding the front panel
of the MODIIB must be removed to access the MUSIC
LEVEL control. 

EMERGENCY BYPASS SWITCH:
The MODIIB contains a backup system that will keep
the show sound on the screen in the event of a failure
of the processor. This special circuitry is located on the
Mono card in the main card cage unit and is activated
by the NORMAL-BACKUP switch located just above
the Format pushbuttons.

SECTION 7:

SCHEMATICS

Format Card (SRS5x390) – page 16

Pushbutton Card (MD2BX392) – page 17

Dual Projector Preamp Card (MOD4x300) – page 18

Mono/Backup Card (MOD2x305) – page 19

Meter Card (MOD2x335) – page 20

Noise Reduction Card (MD2Bx374) – page 21

Matrix Card (MOD4x317) – page 22

Optional 1/3 Octave EQ Card (MOD4x320&321) –

page 23-24

One Octave EQ Card (MOD4x324) – page 25

Digital Time Delay Card (MOD5x325) – page 26

Output/Music Card (SRS5x330) – page 27

MODIIB Power Supply (RPS-20) – page 28

3-D Mono Card (SRS5x305) – page xx

The Normal/Backup switch and Stereo Master Fader

Summary of Contents for MOD IIB

Page 1: ...sulting from accident misuse or abuse lack of responsible care or failures not attributable to manufacturing defects except as provided herein SMART Devices Inc makes no warranties express or implied...

Page 2: ...ont panel on the Format Card FORMAT SWITCHING The formats available on the MODIIB are Mono 3 D Mono Stereo A Film SR Digital and Music All for mats may be manually controlled by green pushbut tons on...

Page 3: ...00 mA The backup capability is a stan dard feature on the MODIIB and is not an extra cost option as it is on other systems MODULAR CIRCUITRY The MODIIB system is housed in a card cage rack mount assem...

Page 4: ...Electronic changeover circuitry between stereo pairs is built on the card to allow use in dual projector booths If the MODIIB is installed in a single projector booth leave the second projector input...

Page 5: ...rol the top LED array The bottom three DIP switches 3 1 control the bottom LED array A DIP switch to the right means that it is on and the corresponding LED array will indicate the selected channel or...

Page 6: ...nts leave the pot in the mid position All pots are the single turn type ONE OCTAVE EQUALIZER CARDS MOD4x324 This card is the standard EQ for the Stage Channels and the Left and Right Surround Channels...

Page 7: ...non sync sound from a standard two channel music tape or CD player MOTHERBOARD SRS5x370 SECTION 4 INSTALLATION INSTRUCTIONS PROCESSOR PLACEMENT IN THE RACK Before mounting the MODIIB processor in the...

Page 8: ...eft channel out of phase with the right This is a common error so verify correct wiring before proceeding CHANGEOVER WIRING OF DUAL PROJECTOR PREAMPS Changeover between projectors is done electronical...

Page 9: ...e different digital decoders available on the mar ket See below for specific pinout configuration The DIGITAL DB25 inputs Pin 1 Left Pin 3 Center Pin 5 Right Pin 6 Left Surr Pin 7 Right Surr Pin 8 Sub...

Page 10: ...calibrated microphone dual trace oscilloscope multimeter a tuning wand and appropriate test loops A CHAIN CALIBRATION The A chain is usually considered to be the signal path originating from the sola...

Page 11: ...imum flat high frequency response Do not over adjust the slit loss cor rection in an effort to obtain extended response This will result in an undesirable frequency response peak Note While adjusting...

Page 12: ...GENER ATOR CARD and an EXTENDER CARD for perform ing the calibration and testing of the MODIIB Note Make sure the SMART Pink Noise Generator Card has the following minor modification There must be a j...

Page 13: ...nd boosted by as much as 7 dB in each of the 1 3 octave bands without creating the above problems The use of bass and tre ble controls on the equalizer has also been avoided to further minimize phase...

Page 14: ...AIN CALIBRATION This completes the B chain cali bration SECTION 6 OPERATING INSTRUCTIONS The MODIIB system is one of the easiest systems to operate The Manager Operator of the sound booth should revie...

Page 15: ...and is activated by the NORMAL BACKUP switch located just above the Format pushbuttons SECTION 7 SCHEMATICS Format Card SRS5x390 page 16 Pushbutton Card MD2BX392 page 17 Dual Projector Preamp Card MOD...

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