Ericsson BML 161 51/021 Maintenance Manual Download Page 8

OPERATION

To Use The Desk Charger

1.

Turn the radio OFF and place the radio into the charging
sleeve with the speaker facing the front of the charger, or
properly insert the battery into the charger as indicated on
the battery pack making sure the ON-OFF switch on the
battery pack is in the OFF position. (M-RK, Monogram
or Prism HP battery packs do not have an ON/OFF
switch).

2.

STANDARD DESK CHARGERe: The CHARGE (red)
indicator will light indicating the battery is being charged.
To charge the battery to maximum capacity, let the battery
pack charge for at least 14 hours.

3.

RAPID DESK CHARGER: The CHARGE (red) indica-
tor will light indicating the battery is being charged. (If
the RED indicator is blinking slowly the charger is in the
pre-charging mode. This model results if the battery tem-

perature is either too "hot" or "cold", dead or defective, or
if the battery is excessively discharged. If the battery is
excessively discharged, the charger should switch to nor-
mal charge within 10 minutes.)

When the READY (green) indicator lights charging is
complete and the charger is in trickle charge mode.

To Remove A Battery Pack

Simply reach into the cutouts provided in the sides of

the charging insert and lift the battery pack out.

DEFINITIONS

Dead Battery

Battery pack with low voltage due to
long-term self discharge or extreme dis-
charge.

Hot Battery

Battery Pack excessively warmed by
charging or environmental temperature
conditions.

Cold Battery

Battery pack excessively cooled by an
environmental condition.

Defective Battery Battery pack with one or more of the

internal cells shorted.

MAINTENANCE

R E M O V A L   AN D   RE P L AC E M E N T  I N-
STRUCTIONS

RAPID DESK CHARGER

(Shown with sleeve installed)

To reduce risk of injury, charge only nickel-cadmium
batteries. Other types of batteries may burst causing
personal injury or damage.

CAUTION

On occasion when charging a new battery or a battery
which has been out of use for a few months, the charger
will prematurely switch to the trickle charge before the
battery has been fully charged. If this happens, allow
the battery to continue trickle charging overnight. Then
remove and reinsert the battery and observe that the
battery goes through a normal rapid charge before
putting it into service.

NOTE

To avoid electrical shock, disconnect the charger from
the power source before removing or replacing any
component or assembly.

WARNING

AE/LZB 119 1643

8

Summary of Contents for BML 161 51/021

Page 1: ...SERVICING TO QUALIFIED SERVICE PERSONNEL Maintenance Manual Universal Desk Charger Rapid BML 161 51 022 Standard BML 161 51 021 ericssonz CAUTION WARNING TO PREVENT FIRE OR ELECTRIC SHOCK HAZARD DO NO...

Page 2: ...ns of this manual No part of this manual may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying and recording for any purpose without the express...

Page 3: ...rical shock or fire 12 To reduce risk of electric shock unplug the charger from the outlet before attempting any maintenance or cleaning 13 GROUNDING AND AC POWER CORD CONNEC TION To reduce the risk o...

Page 4: ...Charger Not fused RECHARGE TIME Rapid Charger 1 hour Standard Charger 14 hours OPERATING TEMPERATURE RANGE 5 to 45 C DIMENSIONS HxWxD Height 4 4 inches 112 mm Width 4 7 inches 118 5 mm front 5 3 inch...

Page 5: ...ck in 14 hours The charge current for the charger is provided by the wallcube step down transformer Aseries resistor selected by the long or short battery pack microswitch controls the amount of charg...

Page 6: ...43 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 Standard Charger Board F29 4R A9 0086 Rapid Charg...

Page 7: ...ng an acceptable rapid charge This condition may result if the battery is too hot or cold weak or dead or defective If the blinking CHARGE indicator does not turn to a continuous RED after 15 minutes...

Page 8: ...Remove A Battery Pack Simply reach into the cutouts provided in the sides of the charging insert and lift the battery pack out DEFINITIONS Dead Battery Battery pack with low voltage due to long term...

Page 9: ...n 1 Remove the charger sleeve 2 Removefourcasescrews items 14 17 Gentlyseparate the bottom assembly item l from the body item 2 3 Disconnect the LED cable item 8 from connector CNI on the charger boar...

Page 10: ...e Power Supply perform the following steps 1 Disassemble the charger see Case disassembly proce dure 2 Remove the Charger Control Board see Charger Control Board removal 3 Remove the two screws item 3...

Page 11: ...c 0 5 Vdc at CN2 pin 1 If the output voltage is out of range the power supply assembly is defective and must be replaced 2 With a known good battery as a load check the output yoltage of the Charge Co...

Page 12: ...laced with a known good battery If normal operation results the batteryis defective If theproblempersists the voltage detection of the PCB has failed which requires replace ment of the Charge Control...

Page 13: ...d on the Standard Charger Board This board receives low voltage AC from the wall cube trans former This AC supply is converted to DC by a full wave bridge rectifier consisting of DI D2 D3 and D4 The c...

Page 14: ...STANDARD CHARGER BML 161 51 021 CHARGER BOARD F29 4R A9 0086 3R M5 0028 SCHEMATIC DIAGRAM AE LZB 119 1643 14...

Page 15: ...SCHEMATIC DIAGRAM RAPID CHARGER BML 161 51 022 POWER SUPPLY BOARD part of F29 4R A9 0082 3R M5 0017 AE LZB 119 1643 15...

Page 16: ...RAPID CHARGER BML 161 51 022 CONTROL BOARD F29 4R A9 0083 2R M5 0018A SCHEMATIC DIAGRAM AE LZB 119 1643 16...

Page 17: ...PARTS LIST AE LZB 119 1643 17...

Page 18: ...STANDARD CHARGER BML 161 51 021 3R K5 0016 ILLUSTRATED PARTS BREAKDOWN AE LZB 119 1643 18...

Page 19: ...RAPID CHARGER BML 161 51 022 2R K5 0015 ILLUSTRATED PARTS BREAKDOWN AE LZB 119 1643 19...

Page 20: ...Ericsson Inc Private Radio systems Mountain View Road Lynchburg Virginia 24502 AE LZB 119 1643 R1A 1 800 528 7711 Outside USA 804 528 7711 Printed in U S A AE LZB 119 1643...

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