Vertex Standard MH-75A8J User manual

1MH-75A8J Service Manual
Service Manual
16-KEYPAD/DTMF MICROPHONE
MH-75A8J
The MH-75A8J is a 16-Keypad/DTMF Microphone designed especially for Vertex Standard transceivers.
Please refer to the Vertex Standard products catalog for the correct microphone for the trans-
ceiver you are using
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Vertex Standard LMR, Inc.
4-8-8 Nakameguro, Meguro-Ku
Tokyo 153-8644, Japan
©2012 Vertex Standard LMR, Inc.
EAG22X90A
Specifications
Mic Element: Electret Condenser
Mic Impedance: 600 Ohm
Operating Voltage Range: 8 to 9 V DC
Current Drain (Approx.):20 mA
Operating Temperature Range: –22 °F to +140 °F (–30 °C to +60 °C)
Weight (Approx.):7 oz. (200 g)

2MH-75A8J Service Manual
Circuit Diagram (Lot. 1)

3MH-75A8J Service Manual
Parts Layout (Lot. 1)
Side B
Side A
LMV321IDCKR
(Q1003)
UA78L05A
(Q1001)
2SK3973 (5V)
(Q1002)
LC87F2H08AU
(Q1004)
DTC144EUA (26)
(Q1005)

4MH-75A8J Service Manual
Circuit Diagram (Lot. 2~)

5MH-75A8J Service Manual
Parts Layout (Lot. 2~)
Side B
Side A
LMV321IDCKR
(Q1003)
UA78L05A
(Q1001)
2SK3973 (5V)
(Q1002)
LC87F2H08AU
(Q1004)
DTC144EUA (26)
(Q1005)

6MH-75A8J Service Manual
C 1001 CHIP TA.CAP. 10uF 16V TEESVB21C106M8R K78120025 1- B
C 1002 CHIP CAP. 1uF 6.3V B GRM188B10J105KA01D K22084801 1- B
C 1003 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- B
C 1004 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B
C 1005 CHIP TA.CAP. 4.7uF 6.3V TEESVA0J475M8R K78080017 1- B
C 1006 CHIP CAP. 0.0056uF 50V B GRM188B11H562KA01D K22174818 1- B
C 1007 CHIP CAP. 47pF 50V CH GRM1882C1H470JA01D K22174227 1- B
C 1008 CHIP CAP. 0.1uF 16V B GRM188B11C104KA01D K22124805 1- B
C 1009 CHIP CAP. 0.01uF 50V B GRM188B11H103KA01D K22174823 1- B
C 1010 CHIP CAP. 0.01uF 50V B GRM188B11H103KA01D K22174823 1- B
C 1011 CHIP TA.CAP. 4.7uF 6.3V TEESVA0J475M8R K78080017 1- B
C 1012 CHIP CAP. 15pF 50V CH GRM1882C1H150JA01D K22174215 1- B
C 1013 CHIP CAP. 15pF 50V CH GRM1882C1H150JA01D K22174215 1- B
C 1014 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B
C 1015 CHIP CAP. 0.001uF 50V B GRM188B11H102KA01D K22174821 1- B
C 1016 CHIP CAP. 0.01uF 50V B GRM188B11H103KA01D K22174823 1- B
D 1001 LED 19-213/S2C-AN1P2B/3T G2071096 1- A
D 1002 LED 19-213/S2C-AN1P2B/3T G2071096 1- A
D 1003 LED 19-213/S2C-AN1P2B/3T G2071096 1- A
D 1004 LED 19-213/S2C-AN1P2B/3T G2071096 1- A
MC1001 MIC. ELEMENT EM-100PT M3290029 1 A
MC1001 MIC. ELEMENT PF0-1055P M3290045 2- A
Q 1001 IC UA78L05ACPKE6(TAPE) G1094229 1- B
Q 1002 FET 2SK397300L G3839738 1- B
Q 1003 IC LMV321IDCKR G1093969 1- B
Q 1004 IC LC87F2H08AU-QFP-E G1094621 1- B
Q 1005 TRANSISTOR DTC144EUA T106 G3070041 1- B
Q 1006 TRANSISTOR 2SC4617 TL R G3346178R 1- B
R 1001 CHIP RES. 1k 1/16W 5% RMC1/16 102JATP J24185102 1- B
R 1002 CHIP RES. 2.2k 1/16W 5% RMC1/16 222JATP J24185222 1- B
R 1003 CHIP RES. 12k 1/16W 5% RMC1/16 123JATP J24185123 1- B
R 1004 CHIP RES. 12k 1/16W 5% RMC1/16 123JATP J24185123 1- B
R 1005 CHIP RES. 10k 1/16W 5% RMC1/16 103JATP J24185103 1- B
R 1006 CHIP RES. 39k 1/16W 5% RMC1/16 393JATP J24185393 1- B
R 1007 CHIP RES. 22k 1/16W 5% RMC1/16 223JATP J24185223 1- B
R 1008 CHIP RES. 4.7k 1/16W 5% RMC1/16 472JATP J24185472 1- B
R 1009 CHIP RES. 4.7k 1/16W 5% RMC1/16 472JATP J24185472 1- B
R 1010 CHIP RES. 680 1/16W 5% RMC1/16 681JATP J24185681 1- B
R 1011 CHIP RES. 100 1/16W 5% RMC1/16 101JATP J24185101 1- B
R 1012 CHIP RES. 0 1/16W 5% RMC1/16 000JATP J24185000 1- B
R 1013 CHIP RES. 2.2k 1/16W 5% RMC1/16 222JATP J24185222 1- B
R 1014 CHIP RES. 2.2k 1/16W 5% RMC1/16 222JATP J24185222 1- B
R 1015 CHIP RES. 1k 1/16W 5% RMC1/16 102JATP J24185102 1- B
R 1016 CHIP RES. 100k 1/16W 5% RMC1/16 104JATP J24185104 1- B
R 1017 CHIP RES. 470 1/16W 5% RMC1/16 471JATP J24185471 1- B
R 1018 CHIP RES. 100 1/16W 5% RMC1/16 101JATP J24185101 1- B
R 1019 CHIP RES. 100 1/16W 5% RMC1/16 101JATP J24185101 1- B
R 1020 CHIP RES. 100 1/16W 5% RMC1/16 101JATP J24185101 1- B
R 1021 CHIP RES. 100k 1/16W 5% RMC1/16 104JATP J24185104 1- B
R 1022 CHIP RES. 100k 1/16W 5% RMC1/16 104JATP J24185104 1- B
R 1023 CHIP RES. 100k 1/16W 5% RMC1/16 104JATP J24185104 1- B
R 1024 CHIP RES. 10k 1/16W 5% RMC1/16 103JATP J24185103 1- B
R 1025 CHIP RES. 1k 1/16W 5% RMC1/16 102JATP J24185102 1- B
R 1026 CHIP RES. 470k 1/16W 5% RMC1/16 474JATP J24185474 1- B
R 1027 CHIP RES. 2.2M 1/16W 5% RMC1/16 225JATP J24185225 1- B
R 1028 CHIP RES. 1k 1/16W 5% RMC1/16 102JATP J24185102 1- B
R 1029 CHIP RES. 2.2k 1/16W 5% RMC1/16 222JATP J24185222 1- B
R 1030 CHIP RES. 470 1/16W 5% RMC1/16 471JATP J24185471 1- B
S 1001 TACT SWITCH SKHHLVA010 N5090161 1- B
X 1001 XTAL U3B 7.3728MHz 7.3728MHZ H0103280 1- B
MIC HOLDER RUBBER RA0183800 1-
WIRE ASSY AAG22X 300MM8PC T9207464 1-
WIRE ASSY GRN 70 (3)/(3) T52507012 1-
Parts List
DESCRIPTION VALUE V/W TOL. VXSTD P/NMFR’S DESIG VERS. LOT.REF. SIDE

7MH-75A8J Service Manual
Exploded View
Non-designated parts are available only aspart of a designated assembly.
REF.
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VXSTD P/N
U20406002
U23316007
U24206001
U70002001
U70004002
U71004002
DESCRIPTION
BINDING HEAD SCREW M4X6NI
BIND HEAD TAPTITE-P M3X16B
BIND HEAD TAPTITE-B M2.6X6
PLAIN WASHER FW2.6
PLAIN WASHER FW4NI
SPRING LOCK WASHER SW4NI
Qty.
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6
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RA1041100
FRONT CASE
RA1041400
RUBBER KNOB
MAIN UNIT
RA1041200
REAR CASE
T9207464
WIREASSY
RA1028200
HOOK
RA0824500
PLATE (HANGER)
Q6000116
TERMINAL (B6 M4)
RA0818700
WEIGHT
RA0818600
RUBBER (PTT)
RA1041300
PTT KNOB
RA0187600
SHEET (MICRO TEX 8X4)
RA0183800
MIC HOLDER RUBBER
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