Motorola Gp68 Part1 6881086c09 O Manual
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March, 19976881086C09-O 2-11 6,7,8,9,12,14,17,18,19,21,22,24 2 4 5 10 11 15 16 31323 1,20 Low Pass Filter Ext. Buffer (UHF Only) Attenuator Low Pass Filter TX RF INJECTIONLO RF INJECTION Rx BufferTx Buffer Prescaler BufferTx/Rx/BS Switching NetworkRx OscTx Osc Low Pass Filter Rx Tank Tx Tank Tx VCO Modulation AUX 3 (U201 pin 1) FILT 5V (U201 pin 18) PRE-IN (U201 pin 20)AUDIO IN STEERING LINE VOLTAGE PRESCALER RF OUT VCO BLOCK DIAGRAM GND VC VCCTRB DATA CLK CEX MODIN VCC, DC5V XTAL1 XTL2 WARP PREIN VCP REFERENCE OSCILLATOR VOLTAGE MULTIPLIER VOLTAGE CONTROLLED OSCILLATOR 2-POLE LOOP FILTER U251 VCOBIC DATA (U401 PIN 52) CLOCK (U401 PIN 53) SYNEN (U401 PIN 11) MODIN (U451 PIN’S 19, 20) +5V (U302 PIN’S 1, 2)5 6 7 8 3, 12, 19, 22, 23 14 15 16 20 32 VMULT2VMULT1CPBIASS1SUPFOUTAUX3 MODOUTIADAPTIOUTGND FREFOUTLOCK2 11 4, 13, 21, 30 29 31 28 1 18 9 1027TRB FILTERED 5VSTEERING LINE LOCK (U401 PIN 37) PRESCALER INLO RF INJECTION (U41 PIN 3) TX RF INJECTION (1ST STAGE OF PA) FREF (U451 PIN 35) U251 FRACTIONAL-N SYNTHESIZER SYNTHESIZER BLOCK DIAGRAM Block Diagram for VCO
2-12 6881086C09-OMarch, 1997 RX INPUT BUFFER sample & holds 3rd order LP Fc = 3 khzPL REJECTION FILTER 7th hp Fc = 300 hz 0.2 db ripple chebyDE-EMPH 1 pole LP Fc = 231 hzsumming smoothing stage 1 pole LP Fc = 9 khzBUFFER Fc = 9 khz PL filter 6 pole LP Fc = 252.5 hzALERT TONE GENERATORDIGITAL 8-BIT VOLUME ATT 1 POLE LP Fc = 9 khzBUFFER Fc = 30 khz anti-aliasing 1 pole LP Fc = 1 khz DPL FILTER 3 pole LP Fc = 150 hz SMOOTHING FILTER 1 POLE llp Fc = 6050 hzGAIN/BUFFER STAGE PA AUDIO MC34119 & EXT. COMPSPEAKER 24 OHM RX AUDIO AFIC BLOCK DIAGRAM DET AUDIO Rx in 325 mV RMS PL/DPL IN PL/DPL clock Alert tone inUnattn. Rx out PL/DPL decorder outRx out PA audio Rated audio 250 mW (RMS) Max. power = 0.5 Watt From Rx out (AFIC) TX AUDIO AFIC BLOCK DIAGRAM 15 khz 6 db/oct 3 khz PRE.EMPH AMPLIMITER dev=3khz(25k) PL/DPL 1 pole LP Fc = 1 khzPL Filter 6 pole LP Fc = 252.5 hzSmoothing filter 1 pole LP Fc = 6050 hz 6 bit PL/DPL encoderDPL Filter 3 pole LP Fc = 150 hzSPLATTERFILTER +3 db, 0 db, -3 db -24 db/oct 2750 hz 4 bit dev. attn 5 bit dev. attn.VCO MOD MIC PRE AMP FILTER RFI PROTECTION EXT. INT. Input 7 mV to 13 mV (RMS) nom. = 11 mVGain = 20 db 300 hz3 khz PL clock from uP(pA6) MIC MIC VOLUME CONTROL POT Block Diagram for AFIC 1.5khz(12.5k)Fc = 15 khz (25khz) 165 mV RMS (12.5khz) PL/DPL
March, 1997 6881086C09-O 3-1 Section 3 Accessory Remote Speaker Microphone Overview The remote speaker microphone is an accessory available with the GP68 Series portable radio. This section provides a general description of the remote speaker microphone and describes the operation, handling precautions, and mainte- nance of this accessory. Description The Model HMN9725 Remote Speaker Microphone includes a speaker, a microphone, a push-to-talk (PTT) switch and associated circuitry. A cable, terminated with a special plug, is provided for attaching to the accessory con- nector on the portable radio. When the remote speaker microphone is attached to the radio, the speaker in the radio is disabled, and receiver audio is connected to the accessory speaker. Similarly, the acces- sory microphone is connected to the transmitter, and the accessory PTT switch can now control the PTT function in the radio. The radio microphone and PTT switch are still operational, but you can listen to the radio only through the accessory speaker. IMPORTANT Observe safety information in the radio oper- ating instructions. Operation 1. Attach the microphoneÕs accessory connector to the accessory connector on top of the radio. 2. While listening to the accessory speaker, turn the radio on. 3. Operate radio according to operating instruc- tions supplied with the radio. NOTE The microphone will perform best if it is worn as shown in Figure 3-1. Handling Precautions To avoid damage to circuits, observe the following handling, shipping, and servicing precautions. ¥ Prior to and while servicing a remote speaker microphone, particularly after moving within the service area, momentarily place both hands on a bare metal, earth-grounded surface. This will discharge any static charge which may have accumulated on the person doing the service. ¥ Whenever possible, avoid touching any electri- cally conductive part of the unit with your hands. NOTE Wearing a conductive wrist strap (Motorola No. RSX-4015A) will minimize static buildup during servicing. WARNING While wearing a conductive wrist strap, be careful near high voltage sources. The good ground provided by the wrist strap will also increase the danger of lethal shock from acci- dentally touching high voltage sources. ¥ When servicing a unit, avoid carpeted areas, dry environments, and certain types of clothing (silk, nylon, etc.) because they contribute to static buildup. Figure 3-1. Ideal Microphone Position
3-2
6881086C09-OMarch, 1997
AccessoryGP68 Portable Radios Service Manual
Remote Speaker Microphone
Maintenance
Refer to the schematic diagram (shown in Figure 3-2), the
exploded view (shown in Figure 3-3), and the parts lists.
Every part in the microphone is identified and illustrated for
assistance in removal and replacement. If necessary, the
external surfaces of the remote speaker microphone may be
cleaned with a 0.5% solution of mild dishwashing detergent
in water (one teaspoon of detergent in a gallon of water).
C4
LS13.5 mm plug
3.5 mm plug +
_
S1 PTT
C1 C2C3 +
_ L2
L4L1
2.5 mm plug
2.5 mm plugMK1
L3(Tip)
(Sleeve)
(Tip)
(Sleeve)
Figure 3-2.Schematic Diagram
¥All electrically powered test equipment should
be grounded. Apply the ground lead from the
test equipment to the unit before connecting the
test probe. Similarly, disconnect the test probe
prior to removing the ground lead.
¥If the microphone cartridge is removed from the
unit, place it on a conductive surface, such as a
sheet of aluminium foil which is connected to
ground through 100k ohms of resistance.
WARNING
If the aluminium foil is connected directly to
ground, be cautious of possible electrical
shock from contacting the foil at the same
time as other electrical circuits.
¥When soldering, be sure the soldering iron is
grounded.
¥Prior to replacing circuit components or touch-
ing the microphone cartridge, be sure to dis-
charge any static buildup. Since voltage
differences can exist across the human body, it is
recommended that only one hand be used if it is
necessary to touch the microphone cartridge
and associated wiring.
¥Replacement microphone cartridges should be
kept in conductive packaging until they are
placed in unit.
March, 19976881086C09-O 3-3 GP68 Portable Radios Service ManualAccessory Remote Speaker Microphone 1 2 34 5 68 9 11 10 7 12 13 14 15 16 17 18 19 20 21 Figure 3-3.Exploded View Parts List HMN9725 Remote Speaker Microphone PL-931024-O REFERENCE SYMBOLMOTOROLA PART NO.DESCRIPTION 10105953N42Front Housing, items 1 thru 5 23305259Q01Nameplate, Motorola 34505182Q01Lever, PTT 43505152J01Grille, cloth 51105461R01Adhesive 60180703Y70Coil cord & connector 70180703Y67PCB: Includes electrical parts 83905834K06Switch: dome, PTT (S1) 93205231Q01Seal, dome 101405219Q01Boot, microphone 110180703Y69Microphone assembly 125005910P05Speaker (LS1) 137505283Q02Pad, speaker 143205690R01Gasket 156405689R01Plate, housing mounting 160300139982Screw, Phillips; 2-56 x 5/32Ó 171505172Q01Housing, back 180484345A06Washer, 3 used 190305137Q02Screw, Phillips, 3 used 200105959N54Belt clip assembly 210300139982Screw, Phillips, 4 used
3-4 6881086C09-OMarch, 1997 AccessoryGP68 Portable Radios Service Manual GP68 Option Board GP68 Option Board (Only applicable for GP68 Radios) Installation Please refer to Figure 3-4. 1.Dismantle the radio by Þrst removing the chassis from the front housing. See drawing above. (Refer to Section 1 - Radio Disassem- bly/Assembly for instructions on dismantling the radio). NOTE When separating the chassis from the front housing, be careful not to overstress the inter- connect flex connecting the RF Board to the Controller Board. 2.Remove the protective liner from the double- faced adhesive located on the foam pad (on the same side of the logic board as the 12-pin male connector). Orient the Option Board so that the 12-pin male connector is at the lower edge and facing downwards. See Figure 3-4. 3.Attach the Option Board to the Controller Board by inserting the 12-pin male connector into the 12-pin female connector on the Con- troller Board. Push until it is securely in place. 4.Re-assemble the radio. Figure 3-4.Exploded View of the Radio with DTMF Op- tion Board Front Housing Board Controller 12 Pin Female Connector Display Board Chassis Interconnect Flex RF Board Top DTMF Pad 12 Pin Male Connector DTMF Decode Option Board Option Board Enable Procedure The programming options are Selcal, Decode and Serial. To enable one of these options, turn the radio off, press and hold the key, and turn the radio on. The DTMF and SmarT- runk II™ options screen will appear on the display. The default is ´OPt.OFF´ . Press the and keys to show the options, SEL.CAL, dECOdE, and SEriAL . Select the ´dECOdE´ option for the DTMF option board. If you are installing the SmarTrunk II™ option board, select ´SEriAL´ . When the correct option is selected, turn the radio off to save it to memory. DTMF Decode Option Kit numbers: PMLN 4063 — Decode Board PMLN 4064 — Decode Board (10-pack) Overview The DTMF Decode Option Board is an accessory available with the GP68 portable radio. This board requires the radio to be disassembled before it can be installed. Please follow the instructions below carefully. Description The Motorola DTMF Decode Option Board is designed for compatible Motorola Radios. Check with the latest price pages or your nearest Authorized Dealer to confirm compati- bility. The connection is made to the option interface on the Controller Board. When your radio is equipped with this DTMF Decode Option Board, your radio will be able to decode DTMF Selective Call signals. Theory Of Operation A DTMF tone pair will be sent to Ain(U701-8), then DV(U701-14) will signal a detection by going high after a valid tone pair is sensed and decoded at the output pins D1(U701-2), D2(U701-1), D4(U701-16) and D8(U701-15). The DV will remain high until a loss of the current DTMF sig- nal occurs. The transition of this DV signal (from high to low) will be used to acknowledge the micro-P at the main board. When DV is high, the shift register will latch the decoded tone from the DTMF decoder (U701) through parallel ports. The shift register then arranges the 4-bit decoded signal from DTMF decoder (U701) and places into serial form, where D8 is the most significant bit, followed by D4, D2, D1 and finally four more high bits. The microcontroller of the main board senses a transition of DV(U701-14) from high to low. The microcontroller will then send a serial clock to the 8 bit static shift register clock (U702- 10) and retrieve the signal from Q8(U702-3). MEM H H H H D1 D2 D4 D8 LSB MSB
March, 19976881086C09-O 3-5 GP68 Portable Radios Service ManualAccessory GP68 Option Board Packing List DTMF Decode Option Board DTMF Decode Signalling Retrofit Kit Instruction (English) Programming DTMF Codes Dealer Programming You may now program the DTMF Decode codes into the radio. Enter the Special Programming Mode by pressing the key, then turn the radio on. Each code entered may be up to 8 digits, using any of the numeric keys and the , , , , or keys. Rotate the selector switch until Acn Id appears on the dis- play. Press the button and enter the acknowledgment code. Press the Yellow Light/Enter button to store the code. Rotate the selector switch clockwise and ´INd ID´ will appear on the screen. Press the key and enter the Indi- vidual ID code. Press the Yellow Light/Enter button to store the code. Rotate the selector knob clockwise and ´GrP. ID´ will appear on the display. Press the key and enter the Group ID code. Press the Yellow Light/Enter button to store the code. Rotate the selector switch clockwise and ´ALL. ID´ will appear on the display. Press the but- ton and enter the ALL ID code. Press the Yellow Light/ Enter button to store the code. Turn the radio off. This completes the programming of the DTMF decode option board. SmarTrunk II™ Operation For programming and operating instructions, please refer to the SmarTrunk II™ Logic Board Installation and Operation Manual (Motorola manual number 68P04370J43). SmarTrunk II™ Option Board Kit number:PMLN 4066; PMLN 4067, 10-pack (Manual included) MEM A SIGB SQLC LOWN DELD SCAN MEM MEM MEM MEM
3-6 6881086C09-OMarch, 1997 AccessoryGP68 Portable Radios Service Manual DTMF Decoder Option Board (PMLN4063) DTMF Decoder Option Board (PMLN4063) C701 R706 C706 R703 R705C705 C704 U701VIEWED FROM SIDE 2 R702 J701 C703 CR701 C702 11 18 89 9 16 16 6 7 12 + R704 U702 Y701 R701 ILLUSTRATORDATEENGINEER DATE ME LETTERING SIZE: REQUIRES: EDITORDATECHECKER DATE GP68 DTMF MAEPF-25975-O JP AM/RG1/9/97 TP2TP1TP4TP5 TP6TP3 VIEWED FROM SIDE 1 MAEPF-25974-O Circuit Board Details for DTMF Decoder Option Board (PMLN4063)
March, 19976881086C09-O 3-7 GP68 Portable Radios Service ManualAccessory DTMF Decoder Option Board (PMLN4063) Parts List PMLN4063A, DTMF Decode Signalling Retrofit Kit REFERENCE SYMBOLMOTOROLA PART NO.DESCRIPTION CAPACITOR, Fixed : +-5%; 50V unless stated C701, C7022113741F4910nF C7032311049J2610uF, 16V C704, C7052113740F3830pF C706 --------- Not Placed DIODE : CR7014813833C07Diode CONNECTOR : J7012804652J0112 Pin Connector RESISTOR, Fixed : ohm +-5%; .0625W unless stated R7010662057B221.0M R702, R7030662057A491000 R7040662057A0110 R7050662057A491000 R7060662057A7310K MODULE : U7015180914W01DTMF Decode U7025113806A09Shift Register CRYSTAL : Y7014880915W01Oscillator, 3.58MHz PCB : 8404750J01DTMF Board +5V +5V+5V NET TP16 5 4 3 2 1 12 11 10 9 8 7PTT DTMF_CLOCK OPT_TX_AUDIO TX_AUDIO GND +5V SR_DATA DTMF_DATA_IN UNMUTED_RX_AUDIO RX_AUDIO SR_CLOCK DTMF_DATA_OPT 63B81086C60-O TP2 J701 TP3 TP4 TP6 TP5NET NET NET CR701 NET2 3 1NET+5VSERIAL CLOCK SERIAL DATA DATA READY R703 1000 C702 10nF16 10 11 9 8 VDD NET NET NET C701 10nF C704 30pF C705 30pFR701 1.0M R702 1000 Y701 3.58MHzR706 10kC706 NU R705 1000 C703 10uFR704 10 35 2 1 16 15 14 12 10 9 7 4 13 8 11 6 GT XINAIN NC2 NC1 ENVDD MC145436DWMC140218DR2 U701U702D1P1 P2 P3 P4 P5 P6 P7 P8 7 6 5 4 D2 D4 D8 DV ATB XOUT GND XEN13 14 15 1 3 12 2Q8 Q7 Q6 VSSP_SDS CLOCK Schematic Diagram/Parts List for DTMF Decoder Option Board (PMLN4063)
3-8 6881086C09-OMarch, 1997 AccessoryGP68 Portable Radios Service Manual DTMF Decoder Option Board (PMLN4063)