LBI-31629B Maintenance Manual M-PD SYSTEM 136-174 MHz PERSONAL TWO-WAY FM RADIO COMBINATION INCLUDES SERVICE SECTION . . . . . . . . . . . . . . LBI-31677 ericssonz Ericsson Inc. Private Radio Systems Mountain View Road Lynchburg, Virginia 24502 1-800-528-7711 (Outside USA, 804-528-7711) Printed in U.S.A.
LBI-31629 SPECIFICATIONS TABLE OF CONTENTS Page SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 OPTIONS AND ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 COMBINATION NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LBI-31629 COMBINATION NOMENCLATURE HB UHF Digits 1 & 2 Digit 3 Digit 4 Digit 5 Digit 6 Digit 7 Product Code Frequency Range Controller Selectivity Stability Power Souce 800 MHz BELT CLIP PDHC15 PD SWIVEL MOUNT PDHC16 CARRYING CASES WITH BELT LOOP PDHC11 PDHC12 WITH SWIVEL MT PDHC13 PDHC14 STANDARD MODEL SCAN MODEL SHOULDER STRAP PDHC18 G C S 5 M 136-160 MHz System Standard 5 PPM HIGH CAP. NICD H N 150-174 MHz STD CAP.
LBI-31629 • Channel Busy Lock Out: Personality information includes the capability to prevent the transmitter from operating on a channel where carrier activity is present. The "Channel Busy" indicator (BSY) is active during this time. • Automatic/Manual Power Levels: The desired power level on each channel can be programmed into the radio personality such that it is automatically selected channelby-channel or selected manually.
LBI-31629 Assemble these parts into one unit according to the following procedure and as shown in Figure 1 - M-PD Operating Controls and Accessories. Display If BSY If BSY lights, it means that the channel is busy. NOTE Either the antenna or the RF connector should be connected to the M-PD radio main unit, as desired. If the RF connector is inserted in the receptacle, located in the side of the unit, the antenna connector circuit will become open. 1. 2.
LBI-31629 • Signaling Board: provides additional software controlled signaling functions 2. Use the DTMF keypad or use the Recall Telephone Number key (RCL) to enter the digits of the telephone number. 3. Press the secondary key and then press the SEND key. An optional tone (sidetone) may be heard as each digit is transmitted. Interconnection of the control board with other boards and control circuits is made with flexible circuit boards and connectors.
LBI-31629 Q202. The RF power output from Pin 2 of the TX-Amp module A201 is connected through a resistor attenuator to Pin 1 of the PA module where it is applied to the input of the RF power amplifier stages. The RF power amplifier stages amplify the input from the TX-Amp module to a typical power output level of 6 watts at Pin 5. The output at Pin 5 is connected through the power control hybrid IC A203 (PC) and TX-RX switching diode CR201 to low pass filter network FN.
LBI-31629 Synthesizer Circuit Figure 6 - RF Amplifier/Mixer The Synthesizer circuit contains Phase-Lock-loop module (PLL) A102, VCTCXO Reference Oscillator module A103, TX/RX Voltage Controlled Oscillator module (VCO) A106 and a Low Pass Filter amplifier (LPF). Refer to Figure 9 - Synthesizer. The VCO used to generate the receive and transmit reference frequencies is phase locked to a stable VCTCXO reference oscillator through the use of the PLL.
LBI-31629 CONTROLLER CIRCUIT • TX Power, TX Modulation Data • Squelch Data This controller circuit consists of control circuits and audio circuits. Physically, this circuit consists of three circuit boards as follows: • Control Board • Signaling Board • LCD Board Control Board • Display Data ...etc. Audio Processor (A3): The Audio processor consists of a one-chip IC accommodating almost all of the audio functions.
LBI-31629 Charger combinations for charging the battery packs are available with charge times of 1 hour, 3 hours and 16 hours. A combination can be a single unit desk or a vehicular charger. It can also be a wall mounted multiple charger. Charge Level A fully charged battery pack should provide a terminal voltage greater than 7.5V. A fully discharged battery pack should provide a reading of no less than 6V.
LBI-31629 Figure 11 - Disassembly Figure 13 - Disassembly Step 2 Figure 14 - Disassembly Step 3 Figure 12 - Disassembly Step 1 10
LBI-31629 Figure 15 - Disassembly Step 4 Figure 17 - Disassembly Step 6 Figure 16 - Disassembly Step 5 Figure 18 - Disassembly Step 7 11
LBI-31629 INTRINSICALLY SAFE USAGE Selected personal radios with appropriate factory installed F4 Options are certified as Intrinsically Safe by the Factory Mutual Research Corporation for use in Class 1, Division 1 or 2, hazardous locations in the presence of Groups C and D atmospheres; Non-incendive Class 1, Division 2, hazardous locations in the presence of Groups A, B, C and D atmospheres.
PARTS LIST 1. The battery is continuously overcharged for long periods of time. 2. A regularly performed duty cycle which allows the battery to expend only a limited portion of its capacity. If the nickel-cadmium battery is only sparingly or seldom used and is left on continuous charge for one or two months at a time, it could develop the "Memory Effect." On the first discharging cycle, the output voltage could be sufficiently lowered to reduce the battery’s hours of useful service.
LBI-31629 14 INTERCONNECTION DIAGRAM
OUTLINE DIAGRAM LBI-31629 COMPONENT SIDE SOLDER SIDE RADIO BOARD A4WE03739/40 15
LBI-31629 RADIO SCHEMATIC DIAGRAM WITH TYPICAL VOLTAGE A4WE03739/40 16 SCHEMATIC DIAGRAM
OUTLINE DIAGRAM LBI-31629 COMPONENT SIDE SOLDER SIDE Controller Board A4WE04023 17
LBI-31629 Controller Board A4WE04023 18 SCHEMATIC DIAGRAM
OUTLINE DIAGRAM SCHEMATIC DIAGRAM LBI-31629 COMPONENT SIDE SOLDER SIDE Signalling Board A4WE04024 M-PD Signaling Board A4WE04024 19
LBI-31629 OUTLINE DIAGRAM COMPONENT SIDE LCD Board A4WE03737 20 SOLDER SIDE
SCHEMATIC DIAGRAM LBI-31629 LCD 1 Board A4WE03737 21
LBI-31629 Battery Packs 22 SCHEMATIC & OUTLINE DIAGRAM
MECHANICAL PARTS BREAKDOWN LBI-31629 M-PD EXPLODED VIEW SYSTEM TYPE A1WL09006 23
LBI-31629 24 PARTS LIST
PARTS LIST LBI-31629 25
LBI-31629 26 PARTS LIST
PARTS LIST LBI-31629 27
