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M490G — Mic 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, M490H, M490J, M490K, M490L, M490M, M490N, M490T
Folder Modules/INPUT-PRE-AMPS/M490G

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: 37 named (36 high, 1 low 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 · M490G.rto144.json, p. 11LEFT PGRM 1 +BUSP1-2: LEFT PGRM 1 audio bus / pair · confidence high rto-144 · M490G.rto144.json, p. 12LEFT PGRM 1 −BUSP1-3: RIGHT PGRM 1 audio bus / pair · confidence high rto-144 · M490G.rto144.json, p. 13RIGHT PGRM 1 +BUSP1-4: RIGHT PGRM 1 audio bus / pair · confidence high rto-144 · M490G.rto144.json, p. 14RIGHT PGRM 1 −BUS
CONNECTOR P2 · A–ZLETTERED SIDEP2-A: MIC IN A audio in · confidence high rto-144 · M490G.rto144.json, p. 1AMIC IN A −INBP2-C: MIC IN B audio in · confidence high rto-144 · M490G.rto144.json, p. 1CMIC IN B −INDEP2-F: INSERT SEND audio out · confidence high rto-144 · M490G.rto144.json, p. 1FINSERT SEND −OUTP2-H: INSERT RETURN audio in · confidence high rto-144 · M490G.rto144.json, p. 1HINSERT RETURN −INJKP2-L: 8 CTL control / tally · confidence low schematic · 1978 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS CRIC.jpg, p. 1 “8 CTL P2 -L”L8 CTLCTLP2-M: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS CRIC.jpg, p. 1 “Pz-M”Msignal not read?P2-N: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS CRIC.jpg, p. 1 “Ext Ch P2-N ON”Nsignal not read?P2-P: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490G - 490-02-008 - MIC INPUT MODULE.jpg, p. 1 “P2-P Ch B Ou”Psignal not read?RSTP2-U: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS 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 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS CRIC.jpg, p. 1 “P2 -V”Vsignal not read?P2-W: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490G - Mic Input Module (2).pdf, p. 26 “P2 - W! <E-----:”Wsignal not read?XYZCONNECTOR P2 · 1–22NUMBERED SIDEP2-1: MIC IN A audio in · confidence high rto-144 · M490G.rto144.json, p. 11MIC IN A +IN2P2-3: MIC IN B audio in · confidence high rto-144 · M490G.rto144.json, p. 13MIC IN B +IN4P2-5: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS CRIC.jpg, p. 1 “NSERTS R2l 4 > ez0/0 22 / 2 & P2-8 P2- 5 P2.7”5signal not read?P2-6: INSERT SEND audio out · confidence high rto-144 · M490G.rto144.json, p. 16INSERT SEND +OUTP2-7: INSERT RETURN audio in · confidence high rto-144 · M490G.rto144.json, p. 17INSERT RETURN +INP2-8: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS CRIC.jpg, p. 1 “NSERTS R2l 4 > ez0/0 22 / 2 & 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 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS CRIC.jpg, p. 1 “Pz - 12”12signal not read?P2-13: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS CRIC.jpg, p. 1 “P2-13,w”13signal not read?14P2-15: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS 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 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS 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 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS CRIC.jpg, p. 1 “P2-18”18signal not read?P2-19: -25 V power rail · confidence high rto-144 · M490G.rto144.json, p. 119-25 VPWRP2-20: COMMON ground / common · confidence high rto-144 · M490G.rto144.json, p. 120COMMONGNDP2-21: +25 V power rail · confidence high rto-144 · M490G.rto144.json, p. 121+25 VPWRP2-22: signal not read used on a schematic, signal not read · confidence low schematic · 1978 - M490G - 490-02-008 - MIC INPUT MODULE.jpg, p. 1 “CRZi Ctl 0 >P2 -22,2 comm 1n4063”22signal not read?
CONNECTOR (NOT NAMED) · 1–22NUMBERED SIDE12: PGM audio bus / pair · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 302PGMBUS3: PGM 3 OUT audio out · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 303PGM 3 OUTOUT4: PGM 3 OUT audio out · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 304PGM 3 OUTOUT5: PGM 2 OUT audio out · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 305PGM 2 OUTOUT6: PGM 2 OUT audio out · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 306PGM 2 OUTOUT7: PGM 4 OUT audio out · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 307PGM 4 OUTOUT8: PGM 4 OUT audio out · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 308PGM 4 OUTOUT9: SHIELD ground / common · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 309SHIELDGND10: NC not / internally connected · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 3010NCNC11: IC not / internally connected · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 3011ICNC12: IC not / internally connected · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 3012ICNC13: IC not / internally connected · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 3013ICNC14: IC not / internally connected · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 3014ICNC15: CUE OUT, LEFT audio out · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 3015CUE OUT, LEFTOUT16: CUE OUT, LEFT audio out · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 3016CUE OUT, LEFTOUT17: CUE OUT, RIGHT audio out · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 3017CUE OUT, RIGHTOUT18: CUE OUT, RIGHT audio out · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 3018CUE OUT, RIGHTOUT19: NC not / internally connected · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 3019NCNC20: NC not / internally connected · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 3020NCNC21: NC not / internally connected · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 3021NCNC22: CHASSIS ground / common · confidence high table · 1978 - M490G - Mic Input Module (2).pdf, p. 3022CHASSISGND
KEYIN audio inOUT audio outBUS audio bus / pairPWR power railGND ground / commonCTL control / tallyNC not / internally connected? used on a schematic, signal not readhigh: sheetlow: schematic
M490G — Mic Input Module-25 V P2-19+25 V P2-21M490GMIC 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 228 CTL P2-LCOMMON P2-20

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

Pin evidence — 51 contacts
PinSignalKindConfidenceRead fromSource
2PGMaudio bus / pairhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
3PGM 3 OUTaudio outhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
4PGM 3 OUTaudio outhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
5PGM 2 OUTaudio outhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
6PGM 2 OUT
also: BALANCED PREAMPLIFIER… (prose); BALANCED PREAMPLIFIER… (prose); BALANCED PREAMPLIFIER… (prose); BALANCED PREAMPLIFIER… (prose)		audio outhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
7PGM 4 OUTaudio outhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
8PGM 4 OUTaudio outhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
9SHIELDground / commonhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
10NCnot / internally connectedhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
11ICnot / internally connectedhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
12ICnot / internally connectedhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
13ICnot / internally connectedhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
14ICnot / internally connectedhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
15CUE OUT, LEFTaudio outhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
16CUE OUT, LEFTaudio outhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
17CUE OUT, RIGHTaudio outhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
18CUE OUT, RIGHTaudio outhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
19NCnot / internally connectedhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
20NCnot / internally connectedhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
21NCnot / internally connectedhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
22CHASSISground / commonhightable1978 - M490G - Mic Input Module (2).pdf, p. 30
P1-1LEFT PGRM 1audio bus / pairhighrto-144M490G.rto144.json, p. 1
P1-2LEFT PGRM 1audio bus / pairhighrto-144M490G.rto144.json, p. 1
P1-3RIGHT PGRM 1audio bus / pairhighrto-144M490G.rto144.json, p. 1
P1-4RIGHT PGRM 1audio bus / pairhighrto-144M490G.rto144.json, p. 1
P2-AMIC IN Aaudio inhighrto-144M490G.rto144.json, p. 1
P2-1MIC IN A
also: MIC B (schematic)		audio inhighrto-144M490G.rto144.json, p. 1
P2-CMIC IN B
also: CTL (schematic)		audio inhighrto-144M490G.rto144.json, p. 1
P2-3MIC IN B
also: INPUT (schematic)		audio inhighrto-144M490G.rto144.json, p. 1
P2-5—used on a schematic, signal not readlowschematic1978 - M490G - 490-02-008 - CAST COMPONENT DE…, p. 1
“NSERTS R2l 4 > ez0/0 22 / 2 & P2-8 P2- 5 P2.7”
P2-FINSERT SENDaudio outhighrto-144M490G.rto144.json, p. 1
P2-6INSERT SENDaudio outhighrto-144M490G.rto144.json, p. 1
P2-HINSERT RETURNaudio inhighrto-144M490G.rto144.json, p. 1
P2-7INSERT RETURNaudio inhighrto-144M490G.rto144.json, p. 1
P2-8—used on a schematic, signal not readlowschematic1978 - M490G - 490-02-008 - CAST COMPONENT DE…, p. 1
“NSERTS R2l 4 > ez0/0 22 / 2 & P2-8 P2- 5 P2.7”
P2-L8 CTLcontrol / tallylowschematic1978 - M490G - 490-02-008 - CAST COMPONENT DE…, p. 1
“8 CTL P2 -L”
P2-M—used on a schematic, signal not readlowschematic1978 - M490G - 490-02-008 - CAST COMPONENT DE…, p. 1
“Pz-M”
P2-N—used on a schematic, signal not readlowschematic1978 - M490G - 490-02-008 - CAST COMPONENT DE…, p. 1
“Ext Ch P2-N ON”
P2-12—used on a schematic, signal not readlowschematic1978 - M490G - 490-02-008 - CAST COMPONENT DE…, p. 1
“Pz - 12”
P2-P—used on a schematic, signal not readlowschematic1978 - M490G - 490-02-008 - MIC INPUT MODULE.…, p. 1
“P2-P Ch B Ou”
P2-13—used on a schematic, signal not readlowschematic1978 - M490G - 490-02-008 - CAST COMPONENT DE…, p. 1
“P2-13,w”
P2-15—used on a schematic, signal not readlowschematic1978 - M490G - 490-02-008 - CAST COMPONENT DE…, p. 1
“P2 -15”
P2-U—used on a schematic, signal not readlowschematic1978 - M490G - 490-02-008 - CAST COMPONENT DE…, p. 1
“P2-U”
P2-17—used on a schematic, signal not readlowschematic1978 - M490G - 490-02-008 - CAST COMPONENT DE…, p. 1
“P2 - 17”
P2-V—used on a schematic, signal not readlowschematic1978 - M490G - 490-02-008 - CAST COMPONENT DE…, p. 1
“P2 -V”
P2-18—used on a schematic, signal not readlowschematic1978 - M490G - 490-02-008 - CAST COMPONENT DE…, p. 1
“P2-18”
P2-W—used on a schematic, signal not readlowschematic1978 - M490G - Mic Input Module (2).pdf, p. 26
“P2 - W! <E-----:”
P2-19-25 Vpower railhighrto-144M490G.rto144.json, p. 1
P2-20COMMON
also: COMMON (rto-144)		ground / commonhighrto-144M490G.rto144.json, p. 1
P2-21+25 Vpower railhighrto-144M490G.rto144.json, p. 1
P2-22—used on a schematic, signal not readlowschematic1978 - M490G - 490-02-008 - MIC INPUT MODULE.…, p. 1
“CRZi Ctl 0 >P2 -22,2 comm 1n4063”

Pictures

1978 - M490G - 490-01-008 - INPUT MODULE FUNCTIONAL DIAGRAM.jpg1978 - M490G - 490-01-008 - OFF ONISTART TIMER RESET OFF TALLY OFF ISTOP.jpg1978 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS CRIC.jpg1978 - M490G - 490-02-008 - MIC INPUT MODULE.jpg1978 - M490G - 490-04-015 - CUE OUT RIGHT OFF TALLY.jpg1978 - M490G - 490-04-015 - MIC INPUT MODULE.jpg1978 - M490G - 490-04-016 - IGNA PURPOSES FROM REMOTE LOCAT ION RELATED.jpg1978 - M490G - 490-04-016 - SWII WIL SWITCH CHE CUE CHANNE TERNATELY.jpg1978 - M490G - 490-06-018 - ISSUR CSUCDITF OCISION ADO.jpg1978 - M490G - 490-06-018.jpg1978 - M490G - P001 - Title Page.jpg1978 - M490G - P002.jpg1978 - M490G - P003 - 1-1.jpg1978 - M490G - P004 - 1-2.jpg1978 - M490G - P005 - 2-1.jpg1978 - M490G - P006 - 2-2.jpg1978 - M490G - P007 - 2-3.jpg1978 - M490G - P008 - 2-4.jpg1978 - M490G - P009 - 2-5.jpg1978 - M490G - P010 - 3-1.jpg1978 - M490G - P011 - 3-2.jpg1978 - M490G - P012 - 3-3.jpg1978 - M490G - P013 - 3-4.jpg1978 - M490G - P014 - 3-5.jpg1978 - M490G - P015 - 3-6.jpg1978 - M490G - P016 - 3-7.jpg1978 - M490G - P017 - 3-8.jpg1978 - M490G - P018 - 3-9.jpg1978 - M490G - P019 - CD4016.jpg1978 - M490G - P020 - 74C76.jpg1978 - M490G - P021 - 74C221.jpg

Price history

Year Kind Price Listed as Effective Source
2005|38 used market value 100.00 M490G Mic Input wbsps - website ARCHIVE/WBSPS 2008/ARCHIVE/old website/PriceGuide.htm
2006|39 used market value 100.00 M490G Mic Input wbsps - website ARCHIVE/WBSPS 2008/ARCHIVE/jan 2006 shell/priceguide.htm

Physical manual inventory

Item Location Status Scanned
M490G - Mic Input Module DUPLICATE SCANNED BUT NEEDS STICHING
M490G - Mic Input Module PDF - Already scanned
M490G - Mic Input Module Recently scanned and stiched by WB

Documents (2)

Year File
1978|11 1978 - M490G - Mic Input Module (2).pdf note
1978|11 1978 - M490G - Mic Input Module.pdf note

Photos & scans (31)

Year File
1978|11 1978 - M490G - 490-01-008 - INPUT MODULE FUNCTIONAL DIAGRAM.jpg note
1978|11 1978 - M490G - 490-01-008 - OFF ONISTART TIMER RESET OFF TALLY OFF ISTOP.jpg note
1978|11 1978 - M490G - 490-02-008 - CAST COMPONENT DESIGNTIONS CRIC.jpg note
1978|11 1978 - M490G - 490-02-008 - MIC INPUT MODULE.jpg note
1978|11 1978 - M490G - 490-04-015 - CUE OUT RIGHT OFF TALLY.jpg note
1978|11 1978 - M490G - 490-04-015 - MIC INPUT MODULE.jpg note
1978|11 1978 - M490G - 490-04-016 - IGNA PURPOSES FROM REMOTE LOCAT ION RELATED.jpg note
1978|11 1978 - M490G - 490-04-016 - SWII WIL SWITCH CHE CUE CHANNE TERNATELY.jpg note
1978|11 1978 - M490G - 490-06-018 - ISSUR CSUCDITF OCISION ADO.jpg note
1978|11 1978 - M490G - 490-06-018.jpg note
1978|11 1978 - M490G - P001 - Title Page.jpg note
1978|11 1978 - M490G - P002.jpg note
1978|11 1978 - M490G - P003 - 1-1.jpg note
1978|11 1978 - M490G - P004 - 1-2.jpg note
1978|11 1978 - M490G - P005 - 2-1.jpg note
1978|11 1978 - M490G - P006 - 2-2.jpg note
1978|11 1978 - M490G - P007 - 2-3.jpg note
1978|11 1978 - M490G - P008 - 2-4.jpg note
1978|11 1978 - M490G - P009 - 2-5.jpg note
1978|11 1978 - M490G - P010 - 3-1.jpg note
1978|11 1978 - M490G - P011 - 3-2.jpg note
1978|11 1978 - M490G - P012 - 3-3.jpg note
1978|11 1978 - M490G - P013 - 3-4.jpg note
1978|11 1978 - M490G - P014 - 3-5.jpg note
1978|11 1978 - M490G - P015 - 3-6.jpg note
1978|11 1978 - M490G - P016 - 3-7.jpg note
1978|11 1978 - M490G - P017 - 3-8.jpg note
1978|11 1978 - M490G - P018 - 3-9.jpg note
1978|11 1978 - M490G - P019 - CD4016.jpg note
1978|11 1978 - M490G - P020 - 74C76.jpg note
1978|11 1978 - M490G - P021 - 74C221.jpg note

Parts list — board M490G (10 parts)

From 1978 - M490G - P013 - 3-4.jpg, page 1 (scanned); also in timelines/data/bom.csv.

Ref Part Value Manufacturer Mfr part no.
R6 Resistor 1/4w5% Philips 2.2
R7 delete
R8 delete
R9 Resistor 1/4w59 220k
R25 Trim Pot Piher PTIOh (2.5) Sk 5k
R26 Resistor /4w 5% Philips 22
M490G MIC INPUT MODULE
R113 Resistor 1/4w 57 Philips 10K
R118 delete
R119 Resistor 1/4w 5% 15k

Named in other drawings & documents (1)

File Page
19xx - RTO-144 - Module RTO-144 Jumper calculator.xlsx 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.

General description (2)

Description — 253 words · 1978 - M490G - P006 - 2-2.jpg, page 1

M49OG MTC INPUT_MODULE Program Channe Switch 22 cMOS analog switch, serving as the active Sw i tching element the PROGRAM channel The control voltage operate 22 derived from the Iogic circuitry within the module and coupled Z2 via CRI To switch the channel ON _ this control voltage the order +10 volts When the control voltage drops volts the switch will be OFF resulting signa attenuation more than 100 dB _ Booster Amplifiec Following 22 , integrated circuits 23 and amplify the audio signal nomina level dBm equivalent voltage) From the amplifier output the signal routed the PROGRAM ASSIGN switches SwL SWS , SW13, SW14 followed by the mixing bus outputs Program Qutputs Four PROGRAM outputs P1 , P2, P3 P4 are designed feed into four mixing buses Operation ASSIGNMENT SWiTCHES Sw4 SW5, SW13 SWI4 resuit the assignment the PROGRAM the appropriate mixing buses.

Cue Channel The CUE signal orin ginates from bridging takeoff the input the slide ttenuator _ Owing the high input impedance the CUE channel its operation has no effect on the main PROGRAM channel 25 represents the audio switch for the CUE channel Similarly 22 , the control voltage for 25 generated the logic circuitry Js described further on .

The output 25 followed by the booster amplifier 26 which turn feeds the cue bus mixing network ROI through R104 Control ogic The control voltages required operate the PROGRAM switch 22 and the CUE switch 25 are generated with the aid logic circuitry utilizing integrated circuits 27 through 21o

Description — 130 words · 1978 - M490G - P009 - 2-5.jpg, page 1

M49OG Mic INPUT_MQDULE The output produced pin 21o will always pe negative going pulse pproximately 500 milliseconds duration. CRI2 passes this pulse 28, pin thereby "clearing" the B-section the flip-flop and resulting pin 28 switch (or remain at) volts turn Sw tching the CUE switcn 25 OFF AI Tog" con trol inputs are buffered and switch bounce guard against spurious noise Power Supely_Decoueling Power supply decoupling provided by R146 R149 and C5o to C53_ CRI6 and CRI?

serve prevent amplifier damage the event supply voltage reversai The decoupling network crops the +/-25 volt supply rails nominal voltage +/-18 volts 015 decouples and filters the positive suppiy rail= resulting an output +12 volts operate the CMOS circuitry_ ddition, 23 and are further decoup ed by R54, R55, C21 and C22 2-5

Drawings (14)

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.

490-01-008 · functional · 1978|11
Input Module Functional Diagramviewer
490-01-008 · functional · 1978|11
Off Onistart Timer Reset Off Tally Off Istopviewer
490-02-008 · schematic · 1978|11
Cast Component Designtions Cricviewer
490-02-008 · schematic · 1978|11
Mic Input Moduleviewer
490-06-018 · component layout · 1978|11
Issur Csucditf Ocision Adoviewer
490-06-018 · component layout · 1978|11
1978 - M490G - 490-06-018viewer
490-04-015 · connector layout · 1978|11
Cue Out Right Off Tallyviewer
490-04-015 · connector layout · 1978|11
Mic Input Module Connector Rear Viewviewer
490-04-016 · connector layout · 1978|11
Igna Purposes From Remote Locat Ion Relatedviewer
490-04-016 · connector layout · 1978|11
Swii Wil Switch Che Cue Channe Ternatelyviewer

Read from the drawing title blocks.

Drawing Title Date Drawn by Checked by Iss. Source
490-01-008 Off Onistart Timer Reset Off Tally Off Istop file
490-01-008 Input Module Functional Diagram PA MIC 3 file
490-01-008 Mic Input Module Functional Diagram PA 1 file p.25
490-01-008 Mic Input Module Functional Diagram PA FC file p.25
490-02-008 Cast Component Designtions Cric file
490-02-008 Mic Input Module file
490-04-015 Cue Out Right Off Tally file
490-04-015 Mic Input Module 3 file
490-04-015 Input Module PA TR 1 file p.31
490-04-015 Mic Input Module Connector Rear View PA file p.31
490-04-016 Igna Purposes From Remote Locat Ion Related B file
490-04-016 Swii Wil Switch Che Cue Channe Ternately file
490-06-018 Issur Csucditf Ocision Ado MIC file
490-06-018 file
An archive by Anthony Peter Kuzub · WBSps.Kuzub.com · WBSps.ca
generated from M490G.md