Ericsson GE MASTR II 19A149979P1 Maintenance Manual Download Page 1

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MASTR

®

  II BASE STATION

12/24V POWER SUPPLY

19A149979P1 - 120 VOLT/60 Hz
19A149979P2 - 230 VOLT/50 Hz

WARNING: TO PREVENT FIRE OR ELECTRIC SHOCK HAZARD. DO
NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.

CAUTION:  TO PREVENT ELECTRIC SHOCK DO NOT USE THIS (PO-
LARIZED) PLUG WITH AN EXTENSION CORD, RECEPTACLE OR
OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED
TO PREVENT BLADE EXPOSURE.

THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALI-
FIED PERSONNEL ONLY. TO AVOID ELECTRIC SHOCK DO NOT
PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN
THE OPERATING INSTRUCTIONS UNLESS  YOU ARE QUALI-
FIED TO DO SO. REFER ALL SERVICING TO QUALIFIED SERV-
ICE PERSONNEL

CAUTION

Maintenance Manual

LBI-38551

Summary of Contents for MASTR II 19A149979P1

Page 1: ...O NOT USE THIS PO LARIZED PLUG WITH AN EXTENSION CORD RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALI FIE...

Page 2: ...ONS 3 IMPORTANT SAFETY INFORMATION 4 DESCRIPTION 6 CIRCUIT ANALYSIS 6 MAINTENANCE 7 OUTLINE DIAGRAM 12 ASSEMLBY DIAGRAMS 60 Hz Power Supply 13 50 Hz Power Supply 16 SCHEMATIC DIAGRAMS 60 Hz Power Supp...

Page 3: ...PUT LINE SURGE PROTECTION 150 V rated MOV 60 Hz version 275 V rated MOV 50 Hz version DUTY CYCLE For 0 18 Amp output 100 Continuous Duty OUTPUT VOLTAGE RIPPLE mV p p 25 C mV p p 30 C OUTPUT TRANSIENT...

Page 4: ...his product in an explosive at mosphere unless it has been specifically certified for such operation 12 To reduce risk of electric shock unplug unit from outlet before attempting any maintenance or cl...

Page 5: ...Figure 1 60 Hz Power Supply 19A149979P1 Rev A Figure 2 50 Hz Power Supply 19A149979P2 Rev A LBI 38551 5...

Page 6: ...e s protect the input wiring to the ferroresonant transformer one 10 amp fuse for P1 two 5 amp fuses for P2 The output fuses F2 20 amps and F3 5 amps provide external overload protection The 60 Hz sup...

Page 7: ...uce the output ripple to less than 100 mV p p for any current load up to 3 amps It also keeps transient responses greater than 11 volts and less than 18 volts Resis tor R2 is a 100 ohm 10 watt resisto...

Page 8: ...Figure 3 60 Hz Power Supply 19A149979P1 Rev A Figure 4 50 Hz Power Supply 19A149979P2 Rev A LBI 38551 8...

Page 9: ...eplace fuse with a fuse of the same type and rating To avoid possible electric shock DO NOT operate this power supply with the fuse cover removed WARNING No one should be permitted to handle any porti...

Page 10: ...All four diode packages contain two diodes each 2 Line frequency 60 Hz 3 Load current greater than 15 0 amps Low output voltage on J801 0 Vo 12 5 Vdc Check the following 1 If one of the dual diodes o...

Page 11: ...horted NOTE All four diode packages contain two diodes each 2 Line frequency 50 Hz 3 Load current greater than 15 0 amps Low output voltage on J801 0 Vo 12 5 Vdc Check the following 1 If one of the du...

Page 12: ...PRINTED CIRCUIT BOARD 50 Hz AND 60 Hz MODELS OUTLINE DIAGRAM 33017704 Sh 1 33017700 Sh 1 COMPONENT SIDE 33017704 Sh 1 33017700 Sh 2 SOLDER SIDE LBI 38551 12...

Page 13: ...60 Hz POWER SUPPLY 19A149979P1 Rev A ASSEMBLY DIAGRAM LBI 38551 13...

Page 14: ...60 Hz POWER SUPPLY 19A149979 Rev A 289PS3 Sh 1 Rev C SCHEMATIC DIAGRAM LBI 38551 14...

Page 15: ...PARTS LIST LBI 38551 15...

Page 16: ...50 Hz POWER SUPPLY 19A149979P2 Rev A ASSEMBLY DIAGRAM LBI 38551 16...

Page 17: ...50 Hz POWER SUPPLY 19A149979P2 Rev A 289PS4 Sh 1 Rev C SCHEMATIC DIAGRAM LBI 38551 17...

Page 18: ...PARTS LIST LBI 38551 18...

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