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M490H — Line Input Module
Type module
Category INPUT-PRE-AMPS
Try it simulator & front panel · download package (zip)
Earliest dated evidence 1978|11 — estimate from a dated variant
Evidence from M490
Confidence family
Variants M490, M490A, M490B, M490C, M490D, M490E, M490F, M490G, M490J, M490K, M490L, M490M, M490N, M490T
Folder DOCUMENTS/RECENT SCANS/WBSps.ca 20210317 - Large pile of D
Folder Modules/INPUT-PRE-AMPS/M490H

Connections and circuit (ideal SPICE model)

Drawn live from its RTO-144 connections: run the generator, turn the gain, watch the VU. Open the netlist to see how the model is built.

Pinout & connections

Each contact as its own documents name it: 36 named (36 high confidence). An empty slot is a contact no page names. Hover a contact for its source; the table under the drawing lists them.

CONNECTOR P1 · 1–4NUMBERED SIDEP1-1: LEFT PGRM 1 audio bus / pair · confidence high rto-144 · M490H.rto144.json, p. 11LEFT PGRM 1 +BUSP1-2: LEFT PGRM 1 audio bus / pair · confidence high rto-144 · M490H.rto144.json, p. 12LEFT PGRM 1 −BUSP1-3: RIGHT PGRM 1 audio bus / pair · confidence high rto-144 · M490H.rto144.json, p. 13RIGHT PGRM 1 +BUSP1-4: RIGHT PGRM 1 audio bus / pair · confidence high rto-144 · M490H.rto144.json, p. 14RIGHT PGRM 1 −BUS
CONNECTOR P2 · A–YLETTERED SIDEP2-A: MIC IN A audio in · confidence high rto-144 · M490H.rto144.json, p. 1AMIC IN A −INBP2-C: MIC IN B audio in · confidence high rto-144 · M490H.rto144.json, p. 1CMIC IN B −INDP2-E: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490H - 490-02-009 - CAST COMPONENT DESIGNATIONS CRIC.jpg, p. 1 “PzF P2-J P2-E P2-A”Esignal not read?P2-F: INSERT SEND audio out · confidence high rto-144 · M490H.rto144.json, p. 1FINSERT SEND −OUTP2-H: INSERT RETURN audio in · confidence high rto-144 · M490H.rto144.json, p. 1HINSERT RETURN −INP2-J: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490H - 490-02-009 - CAST COMPONENT DESIGNATIONS CRIC.jpg, p. 1 “PzF P2-J P2-E P2-A”Jsignal not read?KP2-L: signal not read used on a schematic, signal not read · confidence low schematic · 20130725 - WBS M490H MODS.jpg, p. 1 “Pz -L”Lsignal not read?P2-M: signal not read used on a schematic, signal not read · confidence low schematic · 20130725 - WBS M490H MODS.jpg, p. 1 “Pz-M”Msignal not read?P2-N: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490H - 490-02-009 - CAST COMPONENT DESIGNATIONS CRIC.jpg, p. 1 “P2-N”Nsignal not read?P2-P: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490H - 490-02-009 - LINE INPUT MODULE.jpg, p. 1 “P2-P ch B on”Psignal not read?RSTP2-U: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490H - 490-02-009 - CAST COMPONENT DESIGNATIONS CRIC.jpg, p. 1 “P2-U”Usignal not read?P2-V: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490H - 490-02-009 - CAST COMPONENT DESIGNATIONS CRIC.jpg, p. 1 “P2-V”Vsignal not read?WXYCONNECTOR P2 · 1–21NUMBERED SIDEP2-1: MIC IN A audio in · confidence high rto-144 · M490H.rto144.json, p. 11MIC IN A +IN2P2-3: MIC IN B audio in · confidence high rto-144 · M490H.rto144.json, p. 13MIC IN B +IN4P2-5: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490H - 490-02-009 - CAST COMPONENT DESIGNATIONS CRIC.jpg, p. 1 “nSERTS R2l < > ezo/io 22 Pz- 6 P2-8 P2-5 P2-7”5signal not read?P2-6: INSERT SEND audio out · confidence high rto-144 · M490H.rto144.json, p. 16INSERT SEND +OUTP2-7: INSERT RETURN audio in · confidence high rto-144 · M490H.rto144.json, p. 17INSERT RETURN +INP2-8: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490H - 490-02-009 - CAST COMPONENT DESIGNATIONS CRIC.jpg, p. 1 “nSERTS R2l < > ezo/io 22 Pz- 6 P2-8 P2-5 P2-7”8signal not read?91011P2-12: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490H - 490-02-009 - CAST COMPONENT DESIGNATIONS CRIC.jpg, p. 1 “EXt Ch P2 - 12 Off”12signal not read?1314P2-15: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490H - 490-02-009 - CAST COMPONENT DESIGNATIONS CRIC.jpg, p. 1 “P2-15”15signal not read?16P2-17: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490H - 490-02-009 - CAST COMPONENT DESIGNATIONS CRIC.jpg, p. 1 “P2 - 17”17signal not read?P2-18: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490H - 490-02-009 - CAST COMPONENT DESIGNATIONS CRIC.jpg, p. 1 “P2-18”18signal not read?P2-19: -25 V power rail · confidence high rto-144 · M490H.rto144.json, p. 119-25 VPWRP2-20: COMMON ground / common · confidence high rto-144 · M490H.rto144.json, p. 120COMMONGNDP2-21: +25 V power rail · confidence high rto-144 · M490H.rto144.json, p. 121+25 VPWR
CONNECTOR (NOT NAMED) · 1–22NUMBERED SIDE12: PGM audio bus / pair · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 292PGMBUS3: PGM 3 OUT audio out · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 293PGM 3 OUTOUT4: PGM 3 OUT audio out · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 294PGM 3 OUTOUT5: PGM 2 OUT audio out · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 295PGM 2 OUTOUT6: PGM 2 OUT audio out · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 296PGM 2 OUTOUT7: PGM 4 OUT audio out · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 297PGM 4 OUTOUT8: PGM 4 OUT audio out · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 298PGM 4 OUTOUT9: SHIELD ground / common · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 299SHIELDGND10: NC not / internally connected · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 2910NCNC11: IC not / internally connected · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 2911ICNC12: IC not / internally connected · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 2912ICNC13: IC not / internally connected · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 2913ICNC14: IC not / internally connected · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 2914ICNC15: CUE OUT, LEFT audio out · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 2915CUE OUT, LEFTOUT16: CUE OUT, LEFT audio out · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 2916CUE OUT, LEFTOUT17: CUE OUT, RIGHT audio out · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 2917CUE OUT, RIGHTOUT18: CUE OUT, RIGHT audio out · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 2918CUE OUT, RIGHTOUT19: NC not / internally connected · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 2919NCNC20: NC not / internally connected · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 2920NCNC21: NC not / internally connected · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 2921NCNC22: CHASSIS ground / common · confidence high table · 1978 - M490H - Line Input Module (2).pdf, p. 2922CHASSISGND
KEYIN audio inOUT audio outBUS audio bus / pairPWR power railGND ground / commonNC not / internally connected? used on a schematic, signal not readhigh: sheetlow: schematic
M490H — Line Input Module-25 V P2-19+25 V P2-21M490HLINE INPUTMODULEMIC IN AP2-A·P2-1MIC IN BP2-C·P2-3INSERT RETURNP2-H·P2-7PGM2PGM 3 OUT3·4PGM 2 OUT5·6PGM 4 OUT7·8CUE OUT, LEFT15·16CUE OUT, RIGHT17·18LEFT PGRM 1P1-1·P1-2RIGHT PGRM 1P1-3·P1-4INSERT SENDP2-F·P2-6SHIELD 9CHASSIS 22COMMON P2-20MADE OF · SUB-ASSEMBLIES (1)60-1260-12 / INPUT TRANSFORMER

pinout (SVG) · connections (SVG) · pins (JSON)

Pin evidence — 50 contacts
PinSignalKindConfidenceRead fromSource
2PGMaudio bus / pairhightable1978 - M490H - Line Input Module (2).pdf, p. 29
3PGM 3 OUTaudio outhightable1978 - M490H - Line Input Module (2).pdf, p. 29
4PGM 3 OUTaudio outhightable1978 - M490H - Line Input Module (2).pdf, p. 29
5PGM 2 OUTaudio outhightable1978 - M490H - Line Input Module (2).pdf, p. 29
6PGM 2 OUTaudio outhightable1978 - M490H - Line Input Module (2).pdf, p. 29
7PGM 4 OUTaudio outhightable1978 - M490H - Line Input Module (2).pdf, p. 29
8PGM 4 OUTaudio outhightable1978 - M490H - Line Input Module (2).pdf, p. 29
9SHIELDground / commonhightable1978 - M490H - Line Input Module (2).pdf, p. 29
10NCnot / internally connectedhightable1978 - M490H - Line Input Module (2).pdf, p. 29
11ICnot / internally connectedhightable1978 - M490H - Line Input Module (2).pdf, p. 29
12ICnot / internally connectedhightable1978 - M490H - Line Input Module (2).pdf, p. 29
13ICnot / internally connectedhightable1978 - M490H - Line Input Module (2).pdf, p. 29
14ICnot / internally connectedhightable1978 - M490H - Line Input Module (2).pdf, p. 29
15CUE OUT, LEFTaudio outhightable1978 - M490H - Line Input Module (2).pdf, p. 29
16CUE OUT, LEFTaudio outhightable1978 - M490H - Line Input Module (2).pdf, p. 29
17CUE OUT, RIGHTaudio outhightable1978 - M490H - Line Input Module (2).pdf, p. 29
18CUE OUT, RIGHTaudio outhightable1978 - M490H - Line Input Module (2).pdf, p. 29
19NCnot / internally connectedhightable1978 - M490H - Line Input Module (2).pdf, p. 29
20NCnot / internally connectedhightable1978 - M490H - Line Input Module (2).pdf, p. 29
21NCnot / internally connectedhightable1978 - M490H - Line Input Module (2).pdf, p. 29
22CHASSISground / commonhightable1978 - M490H - Line Input Module (2).pdf, p. 29
P1-1LEFT PGRM 1audio bus / pairhighrto-144M490H.rto144.json, p. 1
P1-2LEFT PGRM 1audio bus / pairhighrto-144M490H.rto144.json, p. 1
P1-3RIGHT PGRM 1audio bus / pairhighrto-144M490H.rto144.json, p. 1
P1-4RIGHT PGRM 1audio bus / pairhighrto-144M490H.rto144.json, p. 1
P2-AMIC IN Aaudio inhighrto-144M490H.rto144.json, p. 1
P2-1MIC IN Aaudio inhighrto-144M490H.rto144.json, p. 1
P2-CMIC IN Baudio inhighrto-144M490H.rto144.json, p. 1
P2-3MIC IN Baudio inhighrto-144M490H.rto144.json, p. 1
P2-E—used on a schematic, signal not readlowschematic1978 - M490H - 490-02-009 - CAST COMPONENT DE…, p. 1
“PzF P2-J P2-E P2-A”
P2-5—used on a schematic, signal not readlowschematic1978 - M490H - 490-02-009 - CAST COMPONENT DE…, p. 1
“nSERTS R2l < > ezo/io 22 Pz- 6 P2-8 P2-5 P2-7”
P2-FINSERT SENDaudio outhighrto-144M490H.rto144.json, p. 1
P2-6INSERT SENDaudio outhighrto-144M490H.rto144.json, p. 1
P2-HINSERT RETURNaudio inhighrto-144M490H.rto144.json, p. 1
P2-7INSERT RETURNaudio inhighrto-144M490H.rto144.json, p. 1
P2-J—used on a schematic, signal not readlowschematic1978 - M490H - 490-02-009 - CAST COMPONENT DE…, p. 1
“PzF P2-J P2-E P2-A”
P2-8—used on a schematic, signal not readlowschematic1978 - M490H - 490-02-009 - CAST COMPONENT DE…, p. 1
“nSERTS R2l < > ezo/io 22 Pz- 6 P2-8 P2-5 P2-7”
P2-L—used on a schematic, signal not readlowschematic20130725 - WBS M490H MODS.jpg, p. 1
“Pz -L”
P2-M—used on a schematic, signal not readlowschematic20130725 - WBS M490H MODS.jpg, p. 1
“Pz-M”
P2-N—used on a schematic, signal not readlowschematic1978 - M490H - 490-02-009 - CAST COMPONENT DE…, p. 1
“P2-N”
P2-12—used on a schematic, signal not readlowschematic1978 - M490H - 490-02-009 - CAST COMPONENT DE…, p. 1
“EXt Ch P2 - 12 Off”
P2-P—used on a schematic, signal not readlowschematic1978 - M490H - 490-02-009 - LINE INPUT MODULE…, p. 1
“P2-P ch B on”
P2-15—used on a schematic, signal not readlowschematic1978 - M490H - 490-02-009 - CAST COMPONENT DE…, p. 1
“P2-15”
P2-U—used on a schematic, signal not readlowschematic1978 - M490H - 490-02-009 - CAST COMPONENT DE…, p. 1
“P2-U”
P2-17—used on a schematic, signal not readlowschematic1978 - M490H - 490-02-009 - CAST COMPONENT DE…, p. 1
“P2 - 17”
P2-V—used on a schematic, signal not readlowschematic1978 - M490H - 490-02-009 - CAST COMPONENT DE…, p. 1
“P2-V”
P2-18—used on a schematic, signal not readlowschematic1978 - M490H - 490-02-009 - CAST COMPONENT DE…, p. 1
“P2-18”
P2-19-25 Vpower railhighrto-144M490H.rto144.json, p. 1
P2-20COMMON
also: COMMON (rto-144)		ground / commonhighrto-144M490H.rto144.json, p. 1
P2-21+25 Vpower railhighrto-144M490H.rto144.json, p. 1

Pictures

1978 - M490H - 490-01-009 - LINE INPUT MODULE FUNCTIONAL DIAGRAM.jpg1978 - M490H - 490-01-009 - TIMER RESET OFF TALLY OFF.jpg1978 - M490H - 490-02-009 - CAST COMPONENT DESIGNATIONS CRIC.jpg1978 - M490H - 490-02-009 - LINE INPUT MODULE.jpg1978 - M490H - 490-04-017 - CUE OUT RIGHT OFF TALLY.jpg1978 - M490H - 490-04-017 - LINE INPUT MODULE.jpg1978 - M490H - 490-04-018 - MOVING THE SLIDE JTTENUATOR BEYOND THE INFINITE POSITION.jpg1978 - M490H - 490-04-018 - SWIL WHEN THE SIGNE VIA MIXING NETWORKS.jpg1978 - M490H - 490-06-019 - ISSU IDATE REVISION.jpg1978 - M490H - 490-06-019 - LINE INPUT MODULE.jpg1978 - M490H - 490-06-019.jpg1978 - M490H - P001 - Title Page.jpg1978 - M490H - P002 - 1-1.jpg1978 - M490H - P003 - 1-2.jpg1978 - M490H - P004 - 2-1.jpg1978 - M490H - P005 - 2-2.jpg1978 - M490H - P006 - 2-3.jpg1978 - M490H - P007 - 2-4.jpg1978 - M490H - P008 - 2-5.jpg1978 - M490H - P009 - 3-1.jpg1978 - M490H - P010 - 3-2.jpg1978 - M490H - P011 - 3-3.jpg1978 - M490H - P012 - 3-4.jpg1978 - M490H - P013 - 3-5.jpg1978 - M490H - P014 - 3-6.jpg1978 - M490H - P015 - 3-7.jpg1978 - M490H - P016 - 3-8.jpg1978 - M490H - P017 - 3-9.jpg1978 - M490H - P018 - CD4016.jpg1978 - M490H - P019 - 74C76.jpg1978 - M490H - P020 - 74C221.jpg19xx - DOC - 90-04-017 - PROGRAA CHUNNE THE BUILT-IN DAY LAMP.jpg20130725 - WBS M490H MODS.jpg1982 - 490-01-009 - M490H LINE INPUT MODULE FUNCTIONAL DIAGRAM - DRN PA - ENG PA - ISS 1.jpg

Price history

Year Kind Price Listed as Effective Source
2005|38 used market value 100.00 M490H Line Input wbsps - website ARCHIVE/WBSPS 2008/ARCHIVE/old website/PriceGuide.htm
2006|39 used market value 100.00 M490H Line Input wbsps - website ARCHIVE/WBSPS 2008/ARCHIVE/jan 2006 shell/priceguide.htm

Physical manual inventory

Item Location Status Scanned
M490H - Line Input Module DUPLICATE SCANNED BUT NEEDS STICHING
M490H - Line Input Module PDF - Already scanned
M490H - Line Input Module Recently scanned and stiched by WB

Documents (2)

Year File
1978|11 1978 - M490H - Line Input Module (2).pdf note
1978|11 1978 - M490H - Line Input Module.pdf note

Photos & scans (34)

Year File
1978|11 1978 - M490H - 490-01-009 - LINE INPUT MODULE FUNCTIONAL DIAGRAM.jpg note
1978|11 1978 - M490H - 490-01-009 - TIMER RESET OFF TALLY OFF.jpg note
1978|11 1978 - M490H - 490-02-009 - CAST COMPONENT DESIGNATIONS CRIC.jpg note
1978|11 1978 - M490H - 490-02-009 - LINE INPUT MODULE.jpg note
1978|11 1978 - M490H - 490-04-017 - CUE OUT RIGHT OFF TALLY.jpg note
1978|11 1978 - M490H - 490-04-017 - LINE INPUT MODULE.jpg note
1978|11 1978 - M490H - 490-04-018 - MOVING THE SLIDE JTTENUATOR BEYOND THE INFINITE POSITION.jpg note
1978|11 1978 - M490H - 490-04-018 - SWIL WHEN THE SIGNE VIA MIXING NETWORKS.jpg note
1978|11 1978 - M490H - 490-06-019 - ISSU IDATE REVISION.jpg note
1978|11 1978 - M490H - 490-06-019 - LINE INPUT MODULE.jpg note
1978|11 1978 - M490H - 490-06-019.jpg note
1978|11 1978 - M490H - P001 - Title Page.jpg note
1978|11 1978 - M490H - P002 - 1-1.jpg note
1978|11 1978 - M490H - P003 - 1-2.jpg note
1978|11 1978 - M490H - P004 - 2-1.jpg note
1978|11 1978 - M490H - P005 - 2-2.jpg note
1978|11 1978 - M490H - P006 - 2-3.jpg note
1978|11 1978 - M490H - P007 - 2-4.jpg note
1978|11 1978 - M490H - P008 - 2-5.jpg note
1978|11 1978 - M490H - P009 - 3-1.jpg note
1978|11 1978 - M490H - P010 - 3-2.jpg note
1978|11 1978 - M490H - P011 - 3-3.jpg note
1978|11 1978 - M490H - P012 - 3-4.jpg note
1978|11 1978 - M490H - P013 - 3-5.jpg note
1978|11 1978 - M490H - P014 - 3-6.jpg note
1978|11 1978 - M490H - P015 - 3-7.jpg note
1978|11 1978 - M490H - P016 - 3-8.jpg note
1978|11 1978 - M490H - P017 - 3-9.jpg note
1978|11 1978 - M490H - P018 - CD4016.jpg note
1978|11 1978 - M490H - P019 - 74C76.jpg note
1978|11 1978 - M490H - P020 - 74C221.jpg note
? 19xx - DOC - 90-04-017 - PROGRAA CHUNNE THE BUILT-IN DAY LAMP.jpg note
? 19xx - M490H - DOC - 90-04-017 - PROGRAA CHUNNE THE BUILT-IN DAY LAMP.jpg note
? 20130725 - WBS M490H MODS.jpg note

Sub-assemblies & parts used (1)

Item What Family Year How we know
60-12 60-12 / INPUT TRANSFORMER Input transformers (60-n) 1990|23 named in its manual

Parts list — board M490H (60 parts)

From 1978 - M490H - P012 - 3-4.jpg, page 1 (scanned); also in timelines/data/bom.csv.

Ref Part Value Manufacturer Mfr part no.
M490H LINE INPUT MODULE
R6 Resistor 1/4w5% Philips bold T93 12k
R9 sboid J643 50
R16 isa) 22k
R19 rec amB] inabzobnssni Ted 10K
R20 (VJA '6bn 03J S2a 10K
R22 nofelensaT T0
R25 Trim Pot Sk Piher PTIOh' (2.5) 5k
R26 Resistor 1/4w 5% Philips 22
R33 olin 22 Si0
R41 Resistor 1/4w 5% Philips Mal 7ofeles9 Tra 3K9
R42 era 47K
R43 esa 47k
R49 Slsleb 489 47k
R5I Wai 70j2i2sa 88a 62k
R54 rea 220
R55 Sea 220
R57 Aea 22k
R61 delete Moo eea
R62 Resistor 1/4w 5% eea 100k
R64 TotA 620
R65 delete
R69 Resistor 1/4w 59 2.2 20| A
R71 5ota 2.2
R73 delete AOC 8019
R74 sialsb 0i(9
R75 Potentiometer 70 ( Wai 70i2i239 TT9
R76 Resistor 1/4w 5% Stta 15K
R77 Resistor 1/4w 5% Philips 7otel239 049 15K
R79 Sk Cja
R84 delete Caa
R8B Resistor 1/4w 5% Tca 15k
R90 4K? Eza
R92 Cca 22k
R94 Cza 15K
R98 slelob Koa 100K
R100 Eofi 2m2
R105 WA | / 70i2l299 ean 3k3
R106 Ora 3k3
R108 n Era 30k
R110 delete aca
R111 Resistor 1/4w 5% bMo 1ins.o9 259 10K
R113 Resistor 1/4w5% Philips WA 7012i259 82(9 10K
R116 54o 30k V2za dilne {2 21
R117 (Iwz 4K7
R118 delete sislab Ewz
R119 Resistor 1/4w5% 1SK 75iiwe Jw2
R120 Zwz 10K
R121 Jelsb 0w2 30k
R122 #al6b Fwz 4k7
R123 SK doriw2 BwZ
R124 ewi? 10K
R125 [TTA J729 0iWz 47k
R126 TWZ 15k
R127 2a0- 10K ctvz 28w
R131 OEMJ 1OOK 1n3vi) Pn 15
R132 22k Iatiel Ss 10403
R133 Ozh_ + 4 22k
R137 Issi210 TI 2k2
R147 i1i23a2 edi 1/4w 5% 1nsm9361q?7 92u s0i 620 25nsmiiojon 28w

Named in other drawings & documents (2)

File Page
19xx - RTO-144 - Module RTO-144 Jumper calculator.xlsx 1
1982 - 490-01-009 - M490H LINE INPUT MODULE FUNCTIONAL DIAGRAM - DRN PA - ENG PA - ISS 1.jpg 1

From the manuals

Each manual split into its sections. Text that is the same in many Ward-Beck manuals (warranty, address, standard notes) is kept once on the Boilerplate page and linked.

Specifications (2)

Technical Data — 2207 words · 1978 - M490H - Line Input Module (2).pdf, page 2

M490H LINE I NPUT MODUL E

Input Sen slt l v llY: _10 to +20 d Bm (ref. 600 onm source) .

Fr eq u en c y Resp on .. : +/-0.5 d B f rom 30 Hz to 20 k Hz .

No l . e : 70 d Bm b e l o w n om in al ope ratinll level, w1th SENSIT IV IT Y se t III - 10 dBm , ml .. l nll an enua tor .et at 15 dB " In ha n d " 120 Hz t o 20 kHz ). Noi se d ec..eases a s S£NSITI VI TY 15 d ec..eased .

Ha rmo n i c Dis lort ;on: L ess tha n 0.3SS THO from 30 Hz 10 20 k Hz a l 20 dB a bo v e nomi nal ope ..atlng le v e l or l ess. L ess than O. I S al 1 k Hz al 20 d B a bo v e n om l n e l QI:lerati n g level or less. L e ss Ihan 0.51 at 1 kHz throullh cu e Channel at 20 dB abov e nom inal QI:leralin$l level or less .

Source Impedance: 600 onms , b al anced/unbal.nced.

I np U l I mpedance : 24 , 000 onms .

Ou t put Imped e n c es : 30 , 000 on ms , balan c ed ( pl"Og ,.am c ircul lS) . 60, 000 ohm s, bala n ced (cu e c ircu it .) .

Ou tpu t Le v el : o d Bm nominal, +25 dBm ma .. imum (equ i v alent v o l t a g e 600 ohm s) .

Ph a s i n g : Input an d ou t p u t t e..... ,n.ls designa te d by numbe"s er-e in p h a se, or lo wer n u mbe ,. of numbered p a i,. I s In phase with lower n u mb _ of other n u mb e re d p a i r :

Log ic Inpul L ev e l l' : ( To QI:le,.ale CH ON, CH OFF (; CUE).

L og i c 0: 0 10 +13 v o lts . Log ic I : + 16 to +24 v e ua , a

E.tternal Conlrol OUIPU l: ( Ope n eeuectee c u ..rent si n k ) . .c ps

M i n i mu m load Impedance: 600 ohms. BS

M~Il<1 m Um load cu ....enl: 40 mAo. W :// tp ht

WAR O- BECK S Y S T E M S LT O.

TEC HNICAL DAT A

M490H LINE I NPUT MODULE

Ma ximum supp ly voll age: S41ur 4 1ed eeueeter- vol14ge : +2 veue max imum a t 40 mA l oa d.

Pow er ReQu i r emen ts : +/-25 vol ts ec , 40 mA nominal , 80 mA maximum .

Ambient Tempe r 4 t u r e: 0 10 60 degree s Cel siu s.

Dim en sion s: 1 .6" w i d e x 14. 15" high x 6 .5 " d eep (41 mm " 360 mm x 165 mm) .

a .c ps BS W :// tp ht

WAR D-Be CK S YSTEM S L.TD .

C IRCUIT OESCR I PTI ON

M490H LI NE INPUT MOOULE

The M490H prov ides comp l.l• . - - t . line in put fac lllt ies , as r-~u ir-ed for- • milclng conso le . I nc l u d ed . ,.. soun;. . .I.etor , Pr"09 r-.m bus .ssi g n men t . s well as Ih e ch annel milli n g a ll enU .lor.

Inpu l and P ..e.mpIlU....

Tt, a mUl uall y inle.. loeked INPUT SEL ECTOR sw llches SWI an d SW2 . 1I0w th . . .I.el lon of one of two a vai lable li ne soun;es. An . ddltl on.1 con lac i Is s u p p l Ie d on each s w!t c h for- con lrol pu r-poses. Th. . .estenve nelwor-ks RI to RS p r-e s enl e b r-Id g l n g Impe da nce of 24 ,000 oh ms 10 tb e l i n e sou.-ces . I n a p p li c a tions wh.,.. a li ne le l"ml n al lon Ie requl,..d , a 150 0<" 600 o h m r-e. l.tO<" may b e c onnect ed across t h a In p ulS . Th e . ec on d a r-y of TI i. c onn ected 10 the p ..eamp llfler- con.lstl n g of 01 t h rou gh 0 7 a nd Z I . I n pu t SENSI T IVI TY lri m pol R25, cove.. l ng a r-ange of 30 dB. R25 i . acce ssi ble t h ro u gh t he modu le front p an e l, a dja ce n t 10 th e INPUT SL ECTOR s wl tc he. . Th e eeteocee p ..e.mp ll fle .. out put .pp. .... . t modu le eQr'lne<:to r P2 , pins 6/ F .

Two se .. les -e on n ee te d , b.lanced Inse.. t poi nts are made . vallable .t P2 , p Ins 6/ F, e/ s, S/ E and 7/H , oper- .li ng al a nomina l leve l of o d em o The y allow In. In se ..tlon of ancltl a ..y pl"'OCes . lng equl pmen l I n lO the mix ing ch.nnel .igna l p. th .... e h a ' • comp sor, eqy al ize .. 0 .. flit. .. . The p ro v i. lon of IWO series-con n ec:led In 1 po int. pe l"ml ls l he Ul ll l z.t ion of lhe modula i n . te reo .y.tem• •

Technical Data — 208 words · 1978 - M490H - P002 - 1-1.jpg, page 1

MLIOH LINE INPUT MQDULE Input Sensitivity: -10 +20 dBm (ref 600 ohm source) . Mumizom Frequency Response: +/-0.5 dB from 30 Hz 20 kHz 091070462 060| Am 04 16 T0 / Noise: 70 dBm below nominal operating Ievel , Am 08 Isn(mcn Am with SENSITiViTY set -10 dBm, 6woq mixing attenuator set 15 dB "in hand" (20 Hz 20 kHz) Noise 2012192 decreases as SENSITiViTY decreased .

Harmonic Distortion: 4 Less than 0.35% THD from 30 Hz to cji 20 kHz at 20 dB above nominal operating level less Less than 0.1% kHz at 20 dB above nominal operating level less Less than 0.5% kHz through cue channel 20 dB above nomina operating level less Source Impedance: 600 ohms_ balanced/unbalanced. Input Impedance: 24,000 ohms Output Impedances: 30 0oo ohms, balanced (program circuits) _ 60,000 ohms, balanced (cue circuits) Output Level : dBm nominal = +25 dBm maximum (equivalent vo Itage 600 ohms) Phasing: Input and output terminals designated by numbers are phase, lower number numbered pair phase with lower number other numbered pair.

Logic Input Levels: (To operate Ch ON, Ch OFF CUE )_ Logic Logic +13 volts +16 +24 volts Externa Control Output: (Open collector current sink) . Minimum Ioad impedance: Maximum load current: 600 ohms MA

Parts list (text) (1)

Parts List — 160 words · 1978 - M490H - P015 - 3-7.jpg, page 1

M490H Mic INPUI_MODULE PARI DESCRIPION MFG MFG PARI_NUMBER R113 R114 R115 R116 R117 Resistor 1/4w5% 10K 100k 3k3 30k 54o 21 4K7 Philips WA 7012i259 72 WS ( 82(9 e4A {2 (Iwz Ewz Jw2 Zwz 0w2 Fwz V2za dilne sislab 75iiwe R118 R119 R120 R121 R122 delete Resistor 1/4w5% 1SK 10K 30k 4k7 Jelsb #al6b doriw2 BwZ ewi? 0iWz TWZ ctvz Etwz 27wz R123 R124 R125 R126 R127 SK 10K 47k 15k 10K [TTA J729 2a0- an- 28w 28w R128 R129 R130 R131 R132 10K 47k 22k 1OOK 22k C/ -03 7omhotns-t OEMJ 10403 Ozh_ 1n3vi) Pn 15 Ss 4 Iatiel + R133 R134 R135 R136 R137 22k 4k7 620 10k 2k2 0403 O5 TI 95 e5 0n - Issi210 R138 R139 R14O R14I R142 1/2w5% 1/4w 57 100 10K 10K 10K 10k R143 820 R144 10k R145 10K R146 1/2w57 150 R147 1/4w 5% 620 i1i23a2 edi 1nsm9361q?7 92u s0i 25nsmiiojon 28w 95nbmno;7sq Jngmaiup?

mumiico bsuniinos 7o] 27o7j38lungm 3-7

Drawings (17)

Each scan with its trace laid over it: the slider runs from the scan to the vector drawing. Click one to see it large and save it as SVG, DXF, KiCad, PDF or PowerPoint.

490-01-009 · functional · 1978|11
Line Input Module Functional Diagramviewer
490-01-009 · functional · 1978|11
Timer Reset Off Tally Offviewer
490-02-009 · schematic · 1978|11
Cast Component Designations Cricviewer
490-02-009 · schematic · 1978|11
Line Input Module Velu Ettezeviewer
490-06-019 · component layout · 1978|11
Issu Idate Revisionviewer
490-06-019 · component layout · 1978|11
Line Input Moduleviewer
490-06-019 · component layout · 1978|11
1978 - M490H - 490-06-019viewer
490-04-017 · connector layout · 1978|11
Cue Out Right Off Tallyviewer
490-04-017 · connector layout · 1978|11
Line Input Module Connector Rear Viewviewer
490-04-018 · connector layout · 1978|11
Moving The Slide Jttenuator Beyond The Infinite Positionviewer
490-04-018 · connector layout · 1978|11
Swil When The Signe Via Mixing Networksviewer
90-04-017 · connector layout
Prograa Chunne The Built-In Day Lampviewer

Read from the drawing title blocks.

Drawing Title Date Drawn by Checked by Iss. Source
— file
490-01-009 Line Input Module Functional Diagram PA file
490-01-009 Timer Reset Off Tally Off file
490-01-009 Line Input Module PA B file p.24
490-01-009 Line Input Module PA 3 file p.24
490-02-009 Line Input Module file
490-02-009 Cast Component Designations Cric file
490-04-017 Line Input Module PA 3 file
490-04-017 Cue Out Right Off Tally file
490-04-017 Connector Rear View PA B file p.30
490-04-017 Line Input Module Connector Rear View PA file p.30
490-04-018 Moving The Slide Jttenuator Beyond The Infinite Position file
490-04-018 Swil When The Signe Via Mixing Networks U file
490-06-019 Issu Idate Revision U file
490-06-019 Line Input Module LPA U file
490-06-019 file
90-04-017 Prograa Chunne The Built-In Day Lamp 90 file
An archive by Anthony Peter Kuzub · WBSps.Kuzub.com · WBSps.ca
generated from M490H.md