Vertex Standard MH-53A7A User manual

MH-53A7A Service Manual 1
Vertex Standard LMR, Inc.
©2013 Vertex Standard LMR, Inc.
EAB02X90A
Noise-Canceling Microphone
MH-53A7A
Service Manual
Specifications
Microphone Type: Dynamic
Microphone Impedance: 700-ohm ± 30 % at 1 kHz
Microphone Sensitivity: –49.5 ± 4 dB at 1 kHz (0 dB = 1 V / microbar)
Operating Temperature: 14 °F to 122 °F (–10 °C to 50 °C)
Weight (Approx.): 11.5 oz (325 g)
Non-designated parts are available only as
part of a designated assembly.
The MH-53A7A is a Noise-Canceling Microphone designed especially for Vertex Standard
Transceivers.
S8101141
CURL CORD ASSY
(w/ SCREW)
S8101137
MIC ELEMENT
S8101139
PTT SWITCH ASSY
S8101138
PCB ASSY
U9900100
SCREW
S8101140
MIC ELEMENT
(Rear Side)
Connector Pinout Diagram
Pin 8 (13.8V)
Pin 6 (PTT)
Pin 5 (Hook)
Pin 4 (MIC)
Pin 3 (Ground)

MH-53A7A Service Manual 2
Circuit Diagram
Front Side
Rear Side

MH-53A7A Service Manual 3
Parts Layout
Noise Canceling Unit
Side A
Side B
PTT Unit
S1001

MH-53A7A Service Manual 4
Parts List
DESCRIPTION VALUE V/W TOL. VXSTD P/NMFR’S DESIG REF. LOT. SIDE LAY ADR
*** NOISE CANCELING UNIT ***
PCB with Components S8101138 1-
C 1001 CHIP. TA. CAP. 4.7uF 10V TESVB21A475M8R K78100010 1- B
C 1002 CHIP. TA. CAP. 4.7uF 10V TESVB21A475M8R K78100010 1- B
C 1003 CHIP. TA. CAP. 10uF 10V TEMSVA1A106M-8R K78100028 1- B
C 1005 CHIP. TA. CAP. 4.7uF 10V TESVB21A475M8R K78100010 1- B
C 1006 CHIP CAP. 0.1uF 16V B GRM39B104K16PT K22124805 1- B
C 1017 CHIP. TA. CAP. 4.7uF 10V TESVB21A475M8R K78100010 1- B
C 1018 CHIP CAP. 220pF 50V CH GRM39CH221J50PT K22174243 1- B
C 1019 CHIP. TA. CAP. 4.7uF 10V TESVB21A475M8R K78100010 1- B
C 1022 CHIP CAP. 0.1uF 16V B GRM39B104K16PT K22124805 1- B
C 1025 CHIP CAP. 0.1uF 16V B GRM39B104K16PT K22124805 1- B
C 1026 CHIP CAP. 0.1uF 16V B GRM39B104K16PT K22124805 1- B
C 1027 CHIP CAP. 0.1uF 16V B GRM39B104K16PT K22124805 1- B
C 1028 CHIP CAP. 0.001uF 50V B GRM39B102K50PT K22174821 1- B
D 1001 DIODE UDZ TE-17 5.1B G2070448 1- B
D 1008 DIODE BAS316 G2070716 1- B
Q 1001 IC TA75S01F TE85R G1091593 1- B
R 1001 CHIP RES. 12k 1/16W 5% RMC1/16 123JATP J24185123 1- B
R 1002 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. 68k 1/16W 5% RMC1/16 683JATP J24185683 1- B
R 1006 CHIP RES. 2.2k 1/16W 5% RMC1/16 222JATP J24185222 1- B
R 1007 CHIP RES. 1k 1/16W 5% RMC1/16 102JATP J24185102 1- B
R 1008 CHIP RES. 10k 1/16W 5% RMC1/16 103JATP J24185103 1- B
R 1010 CHIP RES. 680 1/16W 5% RMC1/16 681JATP J24185681 1- B
R 1012 CHIP RES. 470 1/16W 5% RMC1/16 471JATP J24185471 1- B
R 1013 CHIP RES. 100k 1/16W 5% RMC1/16 104JATP J24185104 1- B
R 1015 CHIP RES. 1.8k 1/10W 5% RMC1/10T 182J J24205182 1- B
J 1001 CONNECTOR NTC-8PCBL8 S8101144 1- B
J 1002 CONNECTOR B6B-ZR-SM3-TF S8101145 1- B
*** PTT UNIT ***
PCB with Components S8101139 1-
S 1001 TACT SWITCH SKHHAJ N5090065 1-