Page 1
S
PEAKER MICROPHONE
Vertex Standard LMR, Inc.
4-8-8 Nakameguro, Meguro-Ku
Tokyo 153-8644, Japan
MH-66A4B/A7A/B7A
Service Manual
©2012 Vertex Standard LMR, Inc.
EAE46X90F
The MH-66 is a Speaker Microphone designed especially for Vertex Standard transceivers*.
:
Check with the latest Vertex Product Catalog for a list of the transceivers that can be used with each version.
*
MH-66A4B/A7A MH-66B7A
Specifications
Microphone Impedance: 2.2k-ohm at 1 kHz
Speaker Impedance: MH-66A4B: 4-ohm, MH-66A7A/B7A: 16-ohm
Speaker Input: max. 0.6W
Weight (approx.): 170g
Connector Pinout Diagram
Pin 5 (Select)
Pin 3 (GND)
Pin 1 (Speaker +)
Pin 8 (5.0V)
Pin 6 (PTT)
Pin 4 (MIC)
Pin 2 (Speaker --)
NC Speaker (--), GND
Speaker (+) MIC
MH-66A7A/B7A
MH-66A4B
1MH-66A4B/A7A/B7A Service Manual
Page 2
Exploded View
RA079300A (MH-66A4B/A7A)
RA079290A (MH-66B7A)
FRONT CASE ASSY (W/ SP NET, NAME PLA TE)
RA077510A
MIC HOLDER RUBBER (F)
M3290033
MIC. ELEMENT
RA0774700
COIL SPRING
RA0774300
LEVER
RA0774500
SUPPORT
RA077440A
RUBBER KNOB
RA018250A
CAP (EAR)
This metal fittings are attached to CONNECTOR
P1090861
.
U81053020
STOP RING ETW-4
RA0775000 (x2 pcs)
RUBBER KNOB (MH-66B7A)
RA0776200
RUBBER PACKING
MH-66B7A
MIC-UNIT
②
P1090861
CONNECTOR
RA0186000
WASHER
RA0663200 (MH-66A7A/B7A)
RA066320A (MH-66A4B)
RUBBER PACKING
RA0776000
O RING (x4 pcs)
③
②
①
①
RA0538200
STOPPER PLA TE
RA0317000
SHEET
M4090214 (MH-66A4B)
M4090181 (MH-66A7A/B7A)
SPEAKER
RA0775800
SHEET
③
RA0775200
MIC HOLDER RUBBER (R)
RA0775900
O RING (CASE)
④
③
③
RA0774600
REAR CASE
④
④
④
CP8564002
BELT CLIP ASSY
RA0817400
O RING
T9207547 (MH-66A4B)
WIRE ASSY
U20213020 (x2 pcs)
BINDING HEAD SCREW (M2.6X13SUS)
T9207293A (MH-66A7A/B7A)
WIRE ASSY (W/ SPECIAL SCREW)
S8002230
SPECIAL SCREW (SHORT)
S8002229
SPECIAL SCREW (LONG)
Non-designated parts are available only as part of a designated assembly.
①
②
③
④
U9900094
U24206002
U9900197
U9900196
Description
TAPTITE SCREW M2X5NI#2
TAPTITE SCREW M2.6X6NI
TAPTITE SCREW 2.6X10SUS
TAPTITE SCREW 2.6X6SUS
Qty.Ref. VXSTD P/N
2
2
4
4
2MH-66A4B/A7A/B7A Service Manual
Page 3
MH-66A7A Circuit Diagram (Lot. 1 ~ 93)
MH-66B7A Circuit Diagram (Lot. 1 ~ 93)
3MH-66A4B/A7A/B7A Service Manual
Page 4
MH-66A4B Circuit Diagram
MH-66A7A/B7A Circuit Diagram (Lot. 94 ~)
4MH-66A4B/A7A/B7A Service Manual
Page 5
MH-66A7A/B7A Parts Layout (Lot. 1 ~ 13)
Side A
: These parts have installed only the microphone of "MH-66B7A".
Side B
5MH-66A4B/A7A/B7A Service Manual
Page 6
MH-66A7A/B7A Parts Layout (Lot. 14 ~ 93)
Side A
: These parts have installed only the microphone of "MH-66B7A".
Side B
6MH-66A4B/A7A/B7A Service Manual
Page 7
MH-66A4B Parts Layout
MH-66A7A/B7A Parts Layout (Lot. 94 ~)
Side A
: These parts have installed only the microphone of "MH-66B7A".
Side B
7MH-66A4B/A7A/B7A Service Manual
Page 8
Parts List
DESCRIPTION VALUE V/W TOL. VXSTD P/NMFR’S DESIG VERS. LOT.REF. SIDE
*** MIC-UNIT ***
C 1005 TANTALUM CAP. 10uF 16V TPDN1C100M8S(MX0) K76120019 11-13
C 1005 CHIP TA.CAP. 10uF 16V TEESVA1C106M8R K78120077 14R 1001 CHIP RES. 0 1/2W 5% RMC1/2 JPATE J24275000 A4B/A7A 1R 1001 CHIP RES. 68 1/2W 5% RMC1/2 680JCTP J24275680 B7A 1R 1002 CHIP RES. 8.2k 1/10W 5% RMC1/10T 822J J24205822 1R 1002 CHIP RES. 2.2k 1/10W 5% RMC1/10T 222J J24205222 A4B 1R 1004 CHIP RES. 22k 1/10W 5% RMC1/10T 223J J24205223 B7A 1R 1005 CHIP RES. 27k 1/10W 5% RMC1/10T 273J J24205273 1-33
R 1005 CHIP RES. 27k 1/16W 5% RMC1/16S 273JTH J24189042 34R 1006 CHIP RES. 2.2k 1/10W 5% RMC1/10T 222J J24205222 A7A/B7A 1R 1006 CHIP RES. 0 1/10W 5% RMC1/10T 000J J24205000 A4B 1R 1007 CHIP RES. 6.8k 1/10W 5% RMC1/10T 682J J24205682 B7A 1R 1008 CHIP RES. 0 1/4W 5% RMC1/4 000JATP J24245000 14R 1009 CARBON FILM RES. 1k 1/6W 5% RD16TPJ102 1K J07225102 11-13
R 1009 CHIP RES. 1k 1/10W 5% RMC1/10T 102J J24205102 14-40
R 1009 CHIP RES. 1k 1/10W 5% RMC1/10T 102J J24205102 41R 1010 CHIP RES. 2.2k 1/16W 5% RMC1/16 222JATP J24185222 A4B 1-100
R 1010 CHIP RES. 2.2k 1/16W 5% RMC1/16S 222JTH J24189029 A4B 101S 1001 TACT SWITCH SKRDLBA010 N5090148 1S 1002 TACT SWITCH SKQYPAE010 N5090144 B7A 1S 1003 TACT SWITCH SKQYPAE010 N5090144 B7A 1S 1005 TOGGLE SWITCH ATE1D-6M3-14-Z N2090077 B7A 1-
HOLDER PLATE (TGL) RA0207700 B7A 1-
*** MAIN-ASSY ***
C 0001 CHIP CAP. 0.001uF 50V B GRM40B102M50PT K22170805 1J 0001 CONNECTOR HSJ1857-016220 P1090861 1JP0001 WIRE ASSY RED 30 (3)/(3) T51203012 1JP0002 WIRE ASSY BLK 30 (3)/(3) T51003012 1JP0003 WIRE ASSY RED 50 (3)/(3) T51205012 1JP0004 WIRE ASSY BLK 50 (3)/(3) T51005012 1JP0005 WIRE ASSY ORG 50 (3)/(3) T51305012 1JP0006 WIRE ASSY BLU 50 (3)/(3) T51605012 1MC0001 MIC. ELEMENT EM-114 M3290033 1P 0001 WIRE ASSY AAE46X007 T9207547 A4B/A7A 94P 0001 WIRE ASSY KP-281-F1-7P T9207293 B7A 1-54
P 0001 WIRE ASSY KP-281-F1-7P T9207293A B7A 55P 0002 WIRE ASSY KP-281-F1-7P T9207293 A7A 1-54
P 0002 WIRE ASSY KP-281-F1-7P T9207293A A7A 55SP0001 SPEAKER 4-ohm A-S0000036-004 M4090192B A4B 94-107
SP0001 SPEAKER 4-ohm 36N-D2114B M4090214 A4B 108SP0001 SPEAKER 16-ohm 300891 0.5W/16-OHM M4090141 A7A/B7A 1-8
SP0001 SPEAKER 16-ohm AC033 0.5W/16-OHM M4090181 A7A/B7A 9-
LAYADR
8MH-66A4B/A7A/B7A Service Manual
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