Ericsson BML 161 51/022, BML 161 51/021 Maintenance Manual

Maintenance Manual

Universal Desk Charger

Rapid - BML 161 51/022
Standard - BML 161 51/021

CAUTION

THESE SERVICING INSTRUCTIONS ARE FOR USE BY
QUALIFIED PERSONNEL ONLY. TO AVOID ELECTRIC
SHOCK DO NOT PERFORM ANY SERVICING OTHER
THAN THA T CONTAINED IN THE OPERA TING INSTRUC­TIONS UNLESS YOU ARE QUALIFIED TO DO SO. REFER
ALL SERVICING TO QUALIFIED SERVICE PERSONNEL.

WARNING: TO PREVENT FIRE OR ELECTRIC SHOCK HAZARD,

DO NOT EXPOSE THIS PRODUCT TO RAI N OR MOISTUR E.

CAUTION: TO PREVENT ELECTRIC SHO CK DO N OT U SE THIS

(POLARIZED) PLUG WITH AN EXTENSION CORD, RECEPTACLE OR
OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO
PREVENT BLADE EXPOSURE

ericssonz

AE/LZB 119 1643

TABLE OF CONTENTS

IMPORTANT SAFETY INFORMATION.......................................................................................... 3

SPECIFICATIONS............................................................................................................................... 4

DESCRIPTION..................................................................................................................................... 5

ACCESSORIES AND REPLACEMENT PARTS........... . ... . .............. . . ... . .. . . ... . .. . . ... . .. . . ... . .. . . ... . .. . . ... . .. 5

INST ALLATION ................ .... ... .... . .... ... . .... ... . .... ... .... . .... ... . .... ... .... . .... ... . .... ... . .... ... .... . .... ... . .... ... .... . .... .. 7

INDICATORS ....................................................................................................................................... 7

OPERATION......................................................................................................................................... 8

MAINTENANCE INSTRUCTIONS .................................................................................................. 8

Removal and Replacement Instructions....................................................................................... 8

Troubleshooting Procedures ......................................................................................................... 11

SCHEMATIC DIAGRAMS ................................................................................................................. 14

PARTS LISTS ....................................................................................................................................... 17

ILLUSTRATED PARTS BREAKDOWN ........................................................................................... 18

NOTICE!

This manual covers Ericsson and General Electric products manufactured and s old by Ericsson Inc.

NOTICE!

Repairs to this equipment should be made only by an authorized service technician or facility designated by the supplier.
Any repairs, alterations or substitutions of recommended parts made by the user to this equipment not approved by the
manufacturer could void the user’s authority to operate the equipment in addition to the manufacturer’s warranty.

This manual is publ ished by Ericsson Inc. , without any warranty . Improvements and cha nges to this manual necessit ated by typographical
errors, inaccuracies of current information, or improvements to programs and/or equipment, may be made by Ericsson Inc., at any time
and without notice. Such changes will be incorporated into new editions of this manual. No part of this manual may be reproduced or
transmitte d in any f orm or by any me ans, el ect ronic or m ec hanic al, i ncludi ng phot ocopying and recording, for any purpose, without the
express written perm i ssi on of Ericsson Inc.

NOTE: The Universal Chargers BML 161 51/022 & BML 161 51/024 have been tested
and found to comply with the limits for a Class B digital device, pursuant to part 15 of
the FCC rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This e quipment generates, uses and
can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there
is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the followi n g measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the eq uipment into an o utlet on a cir cuit diff erent f rom that to which

the receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.

Copyright © August 1995, Ericsson Inc.

2

IMPORTANT SAFETY INFORMATION

NOTE

AE/LZB 119 1643

1. SAVE THIS MANUAL - It contains important safety

and operat ing instruc ti ons for Uni ve rsa l Desk Charge r.

2. Before usi ng the batte ry cha rge r, rea d all instruc tion s an d
cautionary markings on (1) the battery charger, (2) the
battery, and (3) the product using the battery.

3. CAUTION - To reduce the risk of injury, charge only
Ericsson battery packs using the proper battery sleeve.
Charging any other battery pack or batteries may cause
the battery to burst and cause per sona l injur y or damag e.

4. Do not expose charg er to rain or snow.

5. Do not use aux il iary e quipm en t not r ec omm ende d or sol d
by the manufacturer. To do so may result in a risk of fire,
electric shock , or injury t o persons.

6 To reduce risk of damage to electric plug and cord, pull

by the plug rather than the cord when disconnecting the
charger.

7. Make sure the cord is located so that it will not be stepped
on, tripped over, or otherwise subjected to damage or
stress.

8. An extension cord should not be used unless absolutely
necessary. Use of an impr oper e xtension cord could re sult
in a risk of fire and electric shock. If an extension cord
must be used, make sure:

14. DANGER - Never alte r the AC cord or plug. If it will not

fit in the outlet, have a prope r outlet installed by a qualifi ed
electrician. Improper connection can result in risk of an
electric shock .

15. The Rapid Charger 120 Vac line cord has a grounding
plug that looks like the plug illustrated in Figure 1. A
temporar y adapter, whic h looks like the adapter illustr ated
in sketche s B and C, may be used to conne c t th is plug to
a two-pole receptacle as shown in sketch B if a properly
grounded outlet is not available. The temporary adapter
should be used only until a properly grounded outlet can
be installed by a qualified electrici an.

16. DANGER - Before using an adapter as illustrated, be
certain the center screw of the outlet plate is grounded.
The green- color rigid ear or lug extending from the
adapter must be connected to a properly grou nded outle t-

-make certain it is grounded. If necessary, replace the
outlet cover plate screw with a longer screw that will
secure adapt er ear or lug to outl et plat e an d mak e groun d
connecti on t o grounded outlet.

17. Care should be taken when placing the charge r in service
to insure proper top and bottom ventilation. A minimum
of 1/4" is requir ed betwee n the bot tom of th e cha rger an d
the surface on which it sits.

a. That pins on the plug of the extension cord are the

same number, size, and shape as those on the
charger’s plug;

b. That the extension cord is properly wired and in good

condition; and

c. That the wire size is large enough for the AC ampere

rating of the charger as specified in Table 1.

9. Do not operate charger with damaged cord or plug ­replace them immediately.

10. Do not operate charger if it has received a sharp blow,
been dropped, or otherwise damaged in any way; return it
to a qualified service sho p.

11. Do not disassemble the charger; return it to a qualified
service shop when service or repair is required. Incorrect
reassembly may result in a risk of electric al shock or fire.

12. To reduce risk of ele c tric shock, unplug the charger from
the outlet before attempting any maintenance or cleaning.

13. GROUNDING AND AC POWER CORD CONNEC­TION - To reduce the risk of electrical shock use only a
properly groun ded out let. The c harger is e quipped wit h an
electric cord having an equipment-grounding conductor
and a grounding plug. Be sure the outlet is properly
install ed and grounde d in accorda nce with all loc al code s
and ordinances.

Due to the temperature characteristics of nickel-cad­mium batteries, the batteries will not accept a full
charge at temperature extremes. For maximum capac­ity , rechar ge the batte ry pac k at a room tem pe rature o f
65° to 85 ° Fahrenheit, whenever possible.

Figure 1 - Grounding Methods

3

AE/LZB 119 1643

VOLTAGE SO UR CE 120/220 Vac ± 10 %, 50/60 Hz

POWER CONSUMPTION

Rapid Charger 33 watt s
Standard C harger 6 watts

FUSE RATING

Rapid Char ger 1 Amp 250 volt, slow blo w
Standard Charger Not fus e d

RECHARGE TIME

Rapid Charger 1 hour
Standard C harger 14 hou rs

SPECIFICA TIONS

OPERATING TEMPERATURE RA NGE +5° to +45°C

DIMENSIONS (HxWxD)

Height 4.4 inches (1 12 mm)
Width 4.7 inch es (118.5 mm) (front)

5.3 inches (134.5 mm)(rear)

Depth 6.6 inches (168 mm)

WEIGHT

Rapid Char ger 2 .0 lb. (0.91 kg)
Standard Charger 1.4 lb. (0.64 kg)

AGENCY APPROVAL

BML 161 5 1/022 (Charger Base) UL, CSA, S EMKO, FCC
BML 161 51/041 (120V Wall) UL, CSA
BML 161 51/042 (220v Wall) S EMKO
BML 161 51/043 (120V Co rd ) UL, CSA
BML 16 1 51/044 ( 220V Cord) SEMKO

TABLE 1

RECOMMENDED MINIMUM SIZE F OR

EXTENSION CORDS

LENGTH OF EXTENSION CORD (Ft.) 25 50 100 150
AWG SIZE OF EXTENSION CORD 18 18 18 16

4

DESCRIPTION

CAUTION

AE/LZB 119 1643

The Universal Desk Charger is designed to charge

Ericsson personal radio battery packs . The charger has one
insert sleeve to securely hold one battery pack. The sleeve
has spring loaded electrical contacts to mate with the charg­ing and thermistor contacts on the battery pack. The sleeves
are designed so a battery pack alone or attached to a radio
can be easily installed or removed from the charger.

The sleeve contains the charging cont acts and any cir-

cuitry unique to charging a particular family of battery packs.
The sleeve is designed to easily plug into the charger base
using grooves in the base for self alignment.

Battery Pack sleeves are available for most Ericsson

personal radios including M-PA, M-PD, PCS etc. The fol­lowing listing identifi es the sleeve required for each radio.

RADIO TYPE SLEEVE
M-PA, M-PD, MTL,

PLS, TPX BML 161 51/001
PCS BML 161 51/002
M-RK BML 161 51/003
MONOGRAM TRUNKING BML 161 51/004
PRISM HP BML 161 51/005

STANDARD CHARGER

Recharging any battery pack or batteries other than the
ones your equipment was designed to charge may
result in damage to equipment, leakage or explosion.

ACCESSORIES AND

REPLACEMENT PARTS

The following accessories and replacement parts are

available for the Universal Desk Chargers:

The Standard Desk Charger is po wered by a 120/220

Vac power source through the use of a plug-in power trans­former called a "Wall Cube" power supply adapter. The
charger is capable of fully charging the battery pack in 14
hours.

The charge current for the charger is provided by the

"wall cube" step-down transformer. A series resistor, selected
by the long or short battery pack microswitch, controls the
amount of charge current. A portion of the current flows
through the CHARGE LED indicating the battery pack is
connected and is being charged.

RAPID CHARGER

The Rapid Desk Charger has a built-in power supply and

plugs directly into a 120/220 Va c power source. The charger
is capable of charging most battery packs in one hour or less.

The Rapid Charger is microprocessor controlled and

uses switching current regulators to regulate the charge cur­rent. Battery voltage and temperature are monitored by the
microprocessor which controls the CHARGE and READY
LEDs and the charge enable transistor. Input power is applied
directly to the switching power supplies. The use of the
switching power su pplies and feedback current regulation
allows the charger to operate at 120 or 220 Vac, 50 or 60 Hz
without adjustment.

120 Vac Wall Transfo rmer

BML 161 51/041

220 Vac Wall Transfo rmer

BML 161 51/042

5

AE/LZB 119 1643

ACCESSORIES AND REPLACEMENT PARTS- Cont.

120 Vac Cord

BML 161 51/043

Rapid Charger Power Supply

F29/4R - A9 - 0082

220 Vac Cord

BML 161 51/044

Rapid Char ge r Control Boa rd

F29/4R - A9 - 0083

Standar d Cha rge r Bo ar d

F29/4R - A9 - 0086

6

Charger Sleeve
M-PA, M-PD, MTL,
PLS & TPX BML 161 51/001

PCS BML 161 51/002
M-RK BML 161 51/003
MONOGRAM TRUNKING BML 161 51/004
PRISM HP BML 161 51/005