Studer-D424-dr-hh 电路图 维修手册.pdf

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1、 Service NoteD424 2001-01 22.10.2001 KSD424 Revision HistoryPage 1 of 4 Hardware History D424 Mother Board 1.866.120 Index 20shipped with prototype and promotion series only (S/N 00 xx, 01xx) subsequent modifications : - R19=68k, Pulldown R1001: P6.14-P6.22, - Upgrades 1.866.910/911/914 Index 21 14.

2、8.1996correct CLK polarity for AES out : connect IC4.5, IC9.5 with IC2.6 R204 (0 Ohm) no longer used improved CLK quality : replace L11 (100mH) with R1002 (22Ohm) replace C182 (10uF) with 100 uF Index 22 5.2.1997SW Upgrade V1.1 : IC60: 1.866.120.21 22, 1.866.905.20 - 21 reliable Desktop Controller o

3、peration : additional C183/184 on soldering side: 47nF IC15.3-5, IC16.3-6 Index 23 30.6.1997SW Upgrade V1.2 : IC60: 1.866.905.21 - 22 Index 24 26.11.1997new layout Index 12, includes above modifications C183/184, R1001 Index 25 22.6.1998 (S/N 1194 improved clock jitter : R210: 3k3 - 1k, R226: 1k - 5

4、k6 improved TC readability : Software 120 MOTCC IC20: 1.866.915.20 - 21 23 25 21 22 21 RadioFans.CN 收音机爱 好者资料库 Service NoteD424 2001-01 22.10.2001 KSD424 Revision HistoryPage 2 of 4 SCSI Board 1.866.130 Index 20shipped with prototype and promotion series only (S/N 00 xx, 01xx) subsequent modificatio

5、ns : wire bridge, see drawing below Index 215.9.1996 shipped with prototype and promotion series only (S/N 00 xx, 01xx) sample accurate timecode sync : - wire bridge P201.23C to RZ301.3 21.9.1996 new layout Index 12without above wire bridges Index 225.2.1997 SW Upgrade V1.1 : (factory upgrade requir

6、ed for SW 1.866.903.21) Main SoftwareIC105/104: 1.866.900/901.20 - 21 Index 2330.6.1997 SW Upgrade V1.2 : Main SoftwareIC105/104: 1.866.900/901.21 - 22 Index 2430.10.1997 SW Upgrade V1.3 : Main SoftwareIC105/104: 1.866.900/901.22 - 23 Frontpanel SWICxx: 1.866.902.20 - 21 decoupled SCSI Termination P

7、ower - additional diode D501: BAV20 in series with R502 correct termination of IRTS3 processor port new R232 (2k7) at P201.30B to 32C Index 2514.4.1998 SW Upgrade V1.3.1 : Main SoftwareIC105/104: 1.866.900/901.23 - 24 Index 2613.8.2001 SW Upgrade V1.6 : Main SoftwareIC105/104: 1.866.900/901.24 - 25

8、lower temperature operation of Altera circuits for extended lifetime - IC 601/701 with mounted heat sink (50.20.3013) Index 20 modification (for boards with layout 11 only) : - cut track between IC 404 pin 1 and nearby contact hole - solder wire to IC404.1, feed it through contact hole, and connect

9、it to IC 204.3 on soldering side Index 21 modification (for boards with layout 11 only) : - add wire bridge P201.23C to RZ301.3 Index 24 : Diode D501Index 24 : R232 SCSI Board 1.866.130.24 Index 26: Heatsink for IC 601/701, mounted with thermally conductive adhesive (99.01.3252) IC 701 : min distanc

10、e to bottom edge : 29 mm RadioFans.CN 收音机爱 好者资料库 Service NoteD424 2001-01 22.10.2001 KSD424 Revision HistoryPage 3 of 4 Analog Input/Output 1.866.140 Index 20 Rev A22.3.2001 protection of AD Converter CS-5390 in power-up phase : - with additional zener diodes D10/11 (5.6V) in parallel to C89/C94 on

11、soldering side Add diodes on soldering side Keyboard 1.866.160 Index 00 8.6.1998 improved crosstalk immunity for reliable IC2 function (Key/Display I/O) with additional C13 (47pF) between IC1.20-21 Add capacitor C13 on soldering side Clock I/O Board 1.866.170 Index 0029.7.1996 Correct Termination Sw

12、itch position (modified in series production) : print modification (wires) to reverse termination switch position, for matching with backpanel label new layout 12, fixes above bug Headphone Connector 23.8.1996 additional 1000p capacitor for improved noise figures. RadioFans.CN 收音机爱 好者资料库 Service NoteD424 2001-01 22.10.2001 KSD424 Revision HistoryPage 4 of 4 Shipping Schedule : Prototypes/ADR12/95 Pre-Series 101-13106/96-08/96 Series09/96-today