Mackie MDR 24/96 User manual

HDR 24/96
Hard Disk Recorder
SERVICE MANUAL
2001 MACKIE DESIGNS, INC.
Service Bulletins

2
SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY
EXPERIENCED REPAIR TECHNICIANS ONLY

3
Additional Safety Information
The following notice concerns the lithium battery located on the motherboard inside the
HDR 24/96 chassis.
WARNING
Service on the HDR 24/96 must
only be undertaken by experienced
service technicians.
! SMD !
The HDR 24/96 makes extensive use of
surface mount components.
Servicing technicians should have the
tools, experience and patience to perform
surface mount rework.
! ESD !
The HDR 24/96 contains
components that may be damaged
by elecrostatic discharge. All
standard ESD precautions must be
taken when servicing.
CAUTION: DANGEROFEXPLOSIONIF BATTERYIS INCORRECTLYREPLACED.
REPLACEONLY WITHTHE SAMEOREQUIVALENT TYPERECOMMENDED BYTHE
MANUFACTURER.DISPOSEOFUSEDBATTERIESACCORDINGTOTHE
MANUFACTURER’SINSTRUCTIONS.
ATTENTION: IL Y A DANGER D’EXPLOSION S’IL Y A REMPLACEMENT
INCORRECTDE LABATTERIE,REMPLACERUNIQUEMENTAVEC UNEBATTERIE
DUMEME TYPEOUD’UNTYPEÉQUIVALENT RECOMMANDÉPARLE
CONSTRUCTEUR.METTREAUREBUTLESBATTERIESUSAGÉESCONFORMÉMENT
AUXINSTRUCTIONSDUFABRICANT.
Warning!: Before applying power to the HDR24/96, make sure that the
Voltage Selector switch next to the AC inlet jack on the rear panel is set
to the line voltage used in your region. Powering-on the HDR24/96 with
the Voltage Selector switch set incorrectly will cause an electrical and
fire hazard that may result in irreparable damage to the unit.

4
CONTENTS
Safety ............................................................................. 2, 3
Introduction...................................................................... 5
Ribbon Cables .................................................................. 6
Connectors........................................................................8
Acuma board notes ...................................................... 20
Small Remote Self-Test...................................................21
BIOS Settings ...................................................................22
Motherboard layout ......................................................25
Quick Parts ......................................................................26
Parts................................................................................A-1
Internal Views ................................................................B-1
Exploded Views.............................................................C-1
Wiring Diagram ..........................................................WD-1
Schematics and PCB layouts
I/O Cards ..............................................................119-1
Front Panel ............................................................178-1
Backplane.............................................................179-1
Brain .......................................................................180-1
Remote I/O...........................................................268-1
Small Remote........................................................291-1
Poststamp .............................................................359-1
Acuma ..................................................................367-1
Click on any
item to go to
that page
Click on any
item to open
up the guide
page G4
Service Bulletins

5
Introduction
This manual contains service information for the HDR 24/96 Hard Disk Recorder. To
service the HDR 24/96, technicians should be familiar with op-amp based and discrete
analog circuitry, digital troubleshooting, microprocessors, digital audio, DSP, ESD, ESP,
and the operation/application of Hard Disk Recorders. Presentation of this manual does
not constitute endorsement of qualifications by Mackie Designs.
This manual is available in Adobe©Portable Document Format (PDF), as part of
Mackie Designs’ Digital Service CD-ROM (part# 820-163-00). This is available to all Service
centers authorized to repair the HDR 24/96. Also included on the CD-ROM are the
schematics, PCB layouts, parts lists, assembly drawings, and the owner’s manual.
It is essential that you become familiar with the owner’s manual as it will be a great
help for you to verify customers complaints, and to check for correct operation.
SERVICE TECHNICAL ASSISTANCE
MackieDesigns,ServiceTechnicalAssistance, isavailable 8AM- 5PMPST, Monday
through Friday for Authorized Mackie Service Centers, at 1-800-258-6883. Feel free to call
with any questions and speak with a carefully-calibrated technician. If one is not
available, leave a detailed message and a qualified Mackoid will return your call asap.
DISCLAIMER
The information contained in this manual is proprietary to Mackie Designs, Inc. The
entire manual is protected under copyright and may not be reproduced by any means
without express written permission from Mackie Designs Inc.
GETTING STARTED
Think of the HDR 24/96 as a standard PC with extra Mackie boards inside. Standard
PC troubleshooting techniques and commercially available diagnostic DOS software
can be applied to repair the HDR 24/96.
A preliminary inspection will often reveal a simple problem, such as a bad
connection somewhere, perhaps a loose cable, a bad switch or control, bad EEPROM or
the CPU’s CMOS settings may need to be reset. Check out the service bulletins, there is
one which explains how to replace the EEPROM.
Our technical support team are available to discuss any problems and offer solutions.

6
Ribbon Cables
Part# Description Rev Qty
040-383-00 RIB 28GA 10C 14.0 PLZD A 1
040-384-00 RIB 28GA 26C 4IN PLZD B 1
040-385-00 RIB 28G TRANS 34C 18.5IN B 1
040-386-00 RIB 28G 26C .100 14.50IN B 1
040-387-00 RIB 28GA 14C 16.0 PLZD A 1
040-390-00 RIB 28GA 10C 7.00 PLZD B 2
040-393-00 CBL ASY 22G 4C/6P 9.0IN A 1
040-438-00 RIB 28GA 16P .100 15.50IN A 1
040-489-00 DIS 18GA 4C 4.5IN PWR/MOL A 1
040-496-00 DIS 18GA 4C 14IN PWR EX A 1
040-497-00 DIS 22G 1007 2C/12P A 1

7

8
This table shows each connector and the boards they connect to. The following pages show each
connector in detail, including the labeling and designation on each pin of the connectors.
J # Pins From To Description Cable Page
J2 ..... 26..... Front Panel.......... J2 Brain board ................... Clock, Latch, Data .................................................... 9
J2 ..... 4 ....... Backplane........... J2 Post Stamp ................... DC Power ................................. 040-489-00 ........... 10
J1 ..... 10..... Backplane........... J1 Brain board ................... Mute, Reset, IO TX, IO RX ........ 040-383-00 ........... 10
J3 ..... 34..... Backplane........... J3 Acuma board ............... CLK, DT data transmit............. 040-385-00 ........... 10
J4 ..... 26..... Backplane........... J4 Acuma board ............... DR data receive ..................... 040-386-00 ........... 10
J18 ... 62..... Backplane........... Card Connector................ various ....................................................................... 11
J19 ... 62..... Backplane........... Card Connector................ various ....................................................................... 11
J20 ... 62..... Backplane........... Card Connector................ various ....................................................................... 11
J9 ..... 4 ....... Brain board ......... Power Supply..................... DC Power .................................................................. 12
J5 ..... 14..... Brain board ......... J5 Remote I/O board ....... COM1,COM2, Punch.............. 040-387-00 ........... 12
J7 ..... 16..... Brain board ......... VFD...................................... Display data ............................ 040-438-00 ........... 12
J3 ..... 2 ....... Brain board ......... Motherboard..................... Flasher, +5V .............................................................. 12
J2 ..... 26..... Brain board ......... J2 Front Panel board ........ Clock, latch, data................... 040-384-00 ........... 13
J8 ..... 2 ....... Brain board ......... VFD Display.............................................................................................................. 13
J1 ..... 10..... Brain board ......... J1 Backplane..................... Mute, Reset, IO RX, IO TX ........ 040-383-00 ........... 13
J2 ..... 4 ....... Remote I/O ......... Power Supply..................... DC Power .................................................................. 14
J9 ..... 10..... Remote I/O ......... Serial 2 Mother board...... COM2........................................ 040-390-00 ........... 14
J10 ... 10..... Remote I/O ......... Serial 1 Mother board...... COM1........................................ 040-390-00 ........... 14
J5 ..... 14..... Remote I/O ......... J5 Brain board ................... COM1,COM2,Punch.............. 040-387-00 ........... 15
J4 ..... 3 ....... Remote I/O ......... 1/4” TRS jack ...................... Punch ......................................................................... 15
J3 ..... 9 ....... Remote I/O ......... Mouse ................................. Mouse data .............................................................. 15
J6 ..... 6 ....... Remote I/O ......... Motherbrd Mouseport ..... Mouse data ............................. 040-393-00 ........... 15
J1 ..... 12..... Remote I/O ......... Small Remote .................... Remote data ............................................................ 15
J1 ..... 4 ....... Post Stamp.......... Power Supply..................... DC Power .................................................................. 16
J2 ..... 4 ....... Post Stamp.......... J2 Backplane..................... DC Power .................................................................. 16
J3 ..... 34..... Acuma board ..... J3 Backplane..................... Mackie Bus Output ................. 040-385-00 ........... 17
J4 ..... 26..... Acuma board ..... J4 Backplane..................... Mackie Bus Input..................... 040-386-00 ........... 17
J5 ..... 6 ....... Acuma board ..... SMPTE 1/4” Jack................ SMPTE ......................................................................... 18
J2 ..... 2 ....... Acuma board ..... CLK IN BNC Jack............... CLK IN......................................................................... 18
J1 ..... 2 ....... Acuma board ..... CLK OUT BNC Jack ............ CLKOUT ..................................................................... 18
PCI ... 124... Acuma board ..... PCI Connector................... PCI data .................................................................... 19
Connectors

9
Front Panel Connector
This connects to
J2of theBrainboard,
see page 13

10
BackPlane Connectors
This connects to
J1of theBrainboard,
see page 13
This connects to
J3of the Acumaboard, see page17
This connects to
J4of the Acumaboard, see page17
Power from J2 of poststamp
board, see page 16

11
BackPlane Connectors

12
Brain Board Connectors
This connects to
J5 of the remote
board,seepage15
This connects
to the VFD
This connects to
power supply

13
Brain Board Connectors
This connects to
J1ofthe backplaneboard,
see page 10
This connects to
J2of thefront panel board,
see page 9

14
Remote Board Connectors
This connects to
Serial 2 of the
motherboard
This connects to
Serial 1 of the
motherboard

15
Remote Board Connectors
J6 connects to the
Mouseport of the
motherboard
J5 connects to
J5 of the brain board,
see page 12

16
Post Stamp Board Connectors
This connects to
power supply
This connects to
J2ofthe backplaneboard,
see page 10

17
Acuma Board Connectors
This connects to
J3 of the Backplane,
see page 10
This connects to
J4 of the Motherboard,
see page 10

18
Acuma Board Connectors
SMPTE (TRS 1/4”)
CLK IN (BNC)
CLK OUT (BNC)

19
PCI connector
Acuma Board Connectors

20
Acuma Board notes
The Acuma board is used to transfer audio from the converter card cage to the PC via
the PCI bus. It is also where the SMPTE and Word Clock connection comes into the PC.
Physically, it is a card which fits into the PCI bus of the PC, and connects via 2 ribbon
cables to the card cage. It has jacks which extend out the back of the unit for WCLK in
(BNC), WCLK out (BNC), and SMPTE (1/4"). There is also a pushbutton for selecting
termination impedance.
All the audio data comes over the ribbon cables from the card cages to the Acuma
card. This data is in digital format. If channels are dead, the ribbon cable connectors are
a good place to start looking since they are readily accessible. For instance, for HDR
input channels, look at the signals on J4. If you see activity on here, then the problem is
on the Acuma card (check U9). If no activity is visible, the problem is within the card
cage - possibly a bad I/O card. For output channels, look on J3. These signals ‘flow’ the
other way, so if no activity is visible, the problem is on the Acuma card.
A failure in the SMPTE transmit or sync capability could be related to a bad component
or faulty joint in the SMPTE circuit. A small amount of analog circuitry (around U17) is used
to buffer incoming signals or generate outgoing signals, and then these are converted to
digital signals (U16) and fed into the FPGA (U3). Tracing from the FPGA to the jacks might
help to spot a problem.
The card contains a PLL for generating WCLK. If WCLK out capabilities are defective, this
circuit could be the culprit. Chip U8 is the ‘guts’ of this. The FPGA (U3) generates signals
(FIN_A and FIN_B) which are smoothed out by the PLL, visible at TP2. This circuit is
extremely sensitive, and bad performance may be caused by a poor joint or ‘worn out’
passive component around U8.
WCLK sync capability is fairly simple. Incoming signals are buffered (U10) and then fed to
the FPGA (U3) . Again, tracing from the FPGA back to the jack is a good way to start.
A lot of the “complicated stuff” is handled within the DSP (U1) or FPGA (U3). If either of
these components fail, rework is not possible and the card will need replacement.
J3(output) J4(input) U9
U16
DSP
U1
FPGA
U3
U8 TP2
U17
in
out
SMPTE
Term switch
U10