Vertex Standard MH-66A4B, MH-66B7A, MH-66A7A Service Manual

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

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

MH-66A7A Circuit Diagram (Lot. 1 ~ 93)

MH-66B7A Circuit Diagram (Lot. 1 ~ 93)

3MH-66A4B/A7A/B7A Service Manual