Motorola Gm Controller Manual
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Page 21
Controller Board Audio and Signalling Circuits 1-17 2.5 RECEIVE SIGNALLING CIRCUITS Refer to Figure 5-6 for reference for the following sections. Figure 4-2 Receive Signalling Paths 2.5.1 Sub-audible (PL/DPL) and High Speed Data Decoder The ASFIC CMP (U0221) is used to filter and limit all received data. The data enters the ASFIC CMP at input DISC (U0221-2). Inside U0221 the data is filtered according to data type (HS or LS), then it is limited to a 0-5V digital level. The MDC and trunking high speed...
Page 22
![Page 22
1-18THEORY OF OPERATION
2.6 Voice Storage (optional)
The Voice Storage (VS) option can be used to store audio signals coming from the rec\
eiver or from
the microphone. Any stored audio signal can be played back over the radio’s speaker or sent out via
the radio’s transmitter.
The Voice Storage option can by placed on the controller section or on an additional option board
which resides on option board connector J0551. Voice Storage IC U0301 provides all required
functionality and is pow ered from...](http://img.usermanuals.tech/thumb/52/48773/w300_gm-controller-21.png "Page 22
1-18THEORY OF OPERATION
2.6 Voice Storage (optional)
The Voice Storage (VS) option can be used to store audio signals coming from the rec\
eiver or from
the microphone. Any stored audio signal can be played back over the radio’s speaker or sent out via
the radio’s transmitter.
The Voice Storage option can by placed on the controller section or on an additional option board
which resides on option board connector J0551. Voice Storage IC U0301 provides all required
functionality and is pow ered from...")
1-18THEORY OF OPERATION 2.6 Voice Storage (optional) The Voice Storage (VS) option can be used to store audio signals coming from the rec\ eiver or from the microphone. Any stored audio signal can be played back over the radio’s speaker or sent out via the radio’s transmitter. The Voice Storage option can by placed on the controller section or on an additional option board which resides on option board connector J0551. Voice Storage IC U0301 provides all required functionality and is pow ered from...
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Chapter 2 TROUBLESHOOTING CHARTS 1.0 Controller Troubleshooting Chart Controller Check Power Up Alert Tone OK? Speaker & Control Head OK? U0101 EXTAL= 7.3728 MHz/ 14.7456 MHz? BUS+ activity when volume knob rotated? MCU is OK Not able to program RF Board ICsBefore replacing MCU, check SPI clock, SPI data, and RF IC select Replace Speaker / Con- trol Head U0221 Pin 34 = 16.8 MHz? Check FGU Reprogram the correct data. & Check ASFIC and MCU Check Control Head and MCU (U0101, U0121,...
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2-2TROUBLESHOOTING CHARTS
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Chapter 3 CONTROLLER SCHEMATICS / PARTS LIST 1.0 Allocation of Schematics and Circuit Boards 1.1 Controller Circuits This Chapter shows the Schematics and the the Parts Lists for the Controller circuits. 1.2 Voice Storage Facility The Voice Storage is fitted on all MPT radios GM640/660/1280 and on GM380 as standard. The schematics, component layout and parts list for these circuits are shown in this chapter. The Voice Storage schematic is shown in Tables below. . Table 3-1 Controller T2 Diagrams...
Page 26
3-2 Con troller schematics / parts list . Table 3-3 Controller T6 Diagrams and Parts Lists Controller T6/T7 used on PCB : T6 on 8486206B06 LB1, 60W T6 on 8486140B12 VHF, 25-45W T6 on 8480643z06 UHF B1, 25-40W T7 on 8486172B07 VHF, 1-25W T7 on 8485670z02 UHF B1, 1-25W SCHEMATICS Controller Overall Supply Voltage Audio I/O T6 I/O T7 Microprocessor Voice Storage (if fitted) Page 3-19 Page 3-20 Page 3-21 Page 3-22 Page 3-23 Page 3-24 Page 3-25 Parts List Controller T6/T7 Page 3-26