Operating instructions

EECO MQS 100 Synchronizer
The EECO MQS 100 is an SMPTE code base system, and as such requires the
machine to reproduce SMPTE time code at fast wind speeds (approximately
420 ips). This wide bandwidth reproduction is achieved through the use of
the Otari accesory WBR-1S. The WBR-1S is a piggyback PCB Assembly
attached to an audio channel PCB Assembly. This modification must be done
by Otari and is available installed on either a new or existing audio PCB
Assembly.
The EECO requires a +24 VDC from the MTR-90 for power. This voltage is
available from the MTR-90III External Connection PCB Assembly. To provide
this voltage to the EXT. CLOCK Connector, one wire must be added.
1. Remove the rar lower panel from the machine by removing the four
phillip screws securing the panel and pull out and down to remove.
2. Remove the four screws securing the External Connection PCB
Assembly to the left rear lower corner of the MTR-90III frame.
3. Disconnect the ribbon and molex-type connectors from the External
Connection PCB Assembly. Pay attention tot he connector number labels
to insure that the connectors are replaced properly.
4. Add a piece of wire approximately 152 mm (6") long from Pin 13 of CN3
(remote connector) to Pin 25 of the EXT. CLOCK connector or to Pin 31
of the PARALLEL I/O connector.
5. Reinstall the External Connection PCB Assembly, being extremely careful
not to damage any connector pins.
6. Reinstall the rear panel on the machine.
The connecting cable between the MQS Sunchronizer and the MTR-90III is
shown in Figure A-4. The cable used should contain three runs of RG-174 or
equivalent coax. If standard multi-conductor cable is being used, these three
coax cables should be added to the harness.
The settings of the two sets of switches must be changed to accommodate
the MZS 100 Synchronizer to the operation of the MTR-90III at 15 ips or 30
ips.
15 ips (10" or 14" reels)
Grandmother PCB low 8
Granddaughter PCB low F
30 ips (10" or 14" reels)
Grandmother PCB low 4
Granddaughter PCB M F
Please refer to the EECO MQS 100 Synchronizer operation manual for the
location of an dinformation regarding these switches.
Appendix A
A - 8
October 1990
MTR-90III Operation and Maintenance Manual