Caltta PM790 User manual

第1页
PM790 Radio
MAINTENANCE MANUAL
(Level1) V1.0
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PM790 Radio Maintenance Manual
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PM790 Radio Maintenance Manual (Level1) V1.0
Version
Date
Author
Update
Remarks
V1.0
2020/5/11
©2020 Copyright Caltta Technologies Co.,Ltd. All rights reserved
Copyright statement:
The copyright of this document belongs to Caltta Technologies Co.,Ltd. Text contains
proprietary information owned by Caltta Technologies Co.,Ltd., without the written permission
of Caltta Technologies Co.,Ltd., any unit or individual shall not use or leak any document and
pictures, this document contains tables, picture, data and other information.
The information in this document contains the development progress of Caltta Technologies
Co.,Ltd. products and technology will continue to update, Caltta Technologies Co.,Ltd. would
not notice such information updates.

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PM790 Radio Maintenance Manual
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CONTENTS
1 Overview....................................................................................................................................................6
1.1 Appearance.................................................................................................................................... 6
1.2 Standard Package.........................................................................................................................6
1.3 Specification................................................................................................................................... 7
2 Function Test........................................................................................................................................... 8
2.1 Basic Function Test.......................................................................................................................8
2.2 Check Firmware Version and Device Information................................................................... 9
3 Software Upgrade.................................................................................................................................10
3.1 Before Upgrade........................................................................................................................... 10
3.2 Upgrade Procedure.....................................................................................................................10
3.3 CPS Software.............................................................................................................................. 17
4 Radio Disassemble Demonstration.................................................................................................27
4.1 Tools.............................................................................................................................................. 27
4.2 Disassemble Steps..................................................................................................................... 28
4.3 Assemble Steps...........................................................................................................................30
4.4 Components.................................................................................................................................31
5 Hardware Pictures................................................................................................................................33
5.1 Front of Main PCB.......................................................................................................................33
5.2 Back of Main PCB....................................................................................................................... 34
6 Troubleshooting Maintenance Flow................................................................................................34
6.1 Structural Part Failure.................................................................................................................34
6.2 Baseband Circuits Troubleshooting Overview....................................................................... 34
6.3 No Power On Current................................................................................................................. 35
6.4 Power On Failure and Current Over 1A.................................................................................. 35

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6.5 Power On Failure and Current Below 1A................................................................................36
6.6 Power On OK and USB Failure................................................................................................ 36
6.7 GPS Failure..................................................................................................................................37
6.8 Control Panel Troubleshooting................................................................................................. 37
6.8.1 LCD No Display.............................................................................................................37
6.8.2 Bluetooth Failure........................................................................................................... 38
6.8.3 Keypad Failure.............................................................................................................. 39
6.8.4 No Sound (Speaker) Failure....................................................................................... 40
6.8.5 Remote Speaker Microphone Failure........................................................................41
6.9 No Voice Failure.......................................................................................................................... 41
6.10 No Sound (Speaker) Failure................................................................................................... 42
7 Check After Maintenance................................................................................................................... 42
7.1 Check Latest Firmware Version and Device Information.....................................................42
7.2 Function Check............................................................................................................................42

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1 Overview
1.1Appearance
Note:
This picture is for reference only, please refer to the actual product.
1.2Standard Package
SN
Item
Quantity (PCS)
1
PM790 Radio Unit
1
2
Keypad Microphone
1
3
Power Cable
1
4
Quick Start Guide
1
5
Screw
5
6
Fuse
1
7
Mounting Bracket
1
8
Bracket Screw
2
9
GPS/BeiDou/GLONASS Active
Antenna
1

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1.3Specification
General
Frequency
UHF1: 400-470MHz UHF3: 350-400MHz
VHF: 136-174MHz
Channel Capacity
1024
Zone Capacity
64 (maximum 32 channels per zone)
Channel Spacing
12.5kHz/20KHz/25KHz
Operating Voltage
DC 13.6V ±15%
Size (H*W*D)
49*178*156mm
Weight
<1.8Kg
Screen
2.0” TFT LCD, 220*176, 4 Lines
Vocoder
AMBE++
Receiver
Sensitivity(Analog)
0.3uV (12dB SINAD)
Sensitivity(Digital)
0.3uV (5% BER)
Adjacent Channel
Selectivity
50 [email protected] /75 dB@25KHz (TIA603D)
60 [email protected] /70 dB@25KHz (ETS)
Intermodulation
75 dB (TIA603D)
70 dB (ETS)
Spurious Rejection
75 dB (TIA603D)
70 dB (ETS)
Blocking or
Desensitization
90dB (TIA603D)
84dB (ETSI)
Co-channel Rejection
-12~0 dB @12.5KHz
Hum and Noise
-40 [email protected] /-45 dB@25KHz
Rated Audio Power
3W (Build-in)
Max Audio Power
6W (Build-in)
Audio Distortion @
Rated Audio
3%
Audio Response
+1～-3dB
Conducted Spurious
Emission
-57 dBm (TIA603D)
Transmitter
Low Power Output
1-24W/5-44W (UHF3/UHF1);
1-24W/5-49W (VHF)
High Power Output
2-25W/6-45W (UHF1/UHF2/UHF3);
2-25W/6-50W (VHF)
FM Modulation
12.5KHz: 11K0F3E / 25KHz: 16K0F3E
4FSK Digital
12.5KHz Data Only: 7K60F1D&7K60FXD

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Modulation
12.5KHz Voice Only: 7K60F1E&7K60FXE
12.5KHz Voice and Data: 7K60F1W
Conducted/Radiated
Emission
-36dBm <1GHz ; -30dBm >1GHz
Modulation Limiting
±2.5KHz @12.5KHz /±5.0KHz @25KHz
FM Hum and Noise
-40 [email protected] /-45 dB@25KHz
Adjacent Channel
Power
60 [email protected] /70 dB @25KHz
Audio Response
+1～-3dB
Audio Distortion
3%
Environmental
Operating
Temperature
-30℃~ +60℃
Storage Temperature
-40℃~ +85℃
ESD
IEC 61000-4-2 (level 4) ±8kV (Contact) ±15kV(Air)
Dust and Water
Resistance
IP54
Thermal and Humidity
GJB 150-2009 and MIL-STD-810 C/D/E/F/G
Shock and Vibration
GJB 150-2009 and MIL-STD-810 C/D/E/F/G
GPS
Accuracy specs are for long-term tracking (95th percentile values>5satellites visible at
nominal -130 dBm signal strength)
TTFF (Time To First
Fix) - Cold Start
<60s
TTFF (Time To First
Fix) - Hot Start
<10s
Horizontal Accuracy
<10m
2 Function Test
2.1Basic Function Test
Item
Test Method and Requirements
Component
Involved

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1.Basic requirement
1. Radio accessories complete.
2. No dismantle label complete.
3. Waterproof label no discoloration.
4. No physical damage.
5. Within the warranty period.
None
2.Failure Re-present
1. Radio can power on normally.
2. Detect the fault as the customer
described, referring to radio user
guide.
Radio Unit,
Power
3.Function Test
1. Test the PTT call to confirm the
function is normal.
2. Confirm it can transmit and receive
voice normally and the actual voice
quality is good.
Keypad
Microphone
Note ：
For other items that cannot be detected in steps (1) to (3), please refer to the radio user manual. If
a fault is found in one step, the subsequent detection steps are suspended as the mobile radio is
treated faulty.
2.2Check Firmware Version and Device Information
Check the firmware version and device information as below:
1) Go to the home screen;
2) Press “ ” button to enter the main menu and choose “Device Info”;
3) Check the firmware version, DSP version, RCDB version, frequency range and serial number,
etc.
Or get the device information by reading through CPS. You can contact after sales to get version
comparison table.

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3 Software Upgrade
3.1Before Upgrade
1. Get the one-click upgrade software for the target version.
2. Prepare the mobile radio to upgrade.
3. Prepare the data cable (Type: AP200). Connect its USB port to your computer USB port,
connect the other side to your radio accessory interface port and fasten it.
AP200 Data Cable:
3.2Upgrade Procedure
1. Install the upgrade software package
1) Click to open the upgrade software, choose the language according to your requirement (Cn for
Chines, En for English);
2) Double click setup.exe in the chosen language folder;
3) Click Next in the below interface;

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4) Select ‘I accept’ and click Next in the below interface;

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5) Select Complete and click Next if you use the default installation path;
Select Custom and click Next if you choose your own installation path;

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Click Change to modify the installation path, then click Next;

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6) Click Install to confirm installation.
7) Wait the installation to complete. Click Finish to end one-click upgrade procedure.

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8) An icon will be on desktop after installation.
2. Radio Upgrade
1) Connect the radio to the PC through the data cable;
2) Double click the upgrade tools icon to run it;
3) The radio enters into the flash burn mode, turn the data cable switch to DL, power on the radio,
the radio enters into the upgrade mode;
The LED indicator glows green in upgrade mode:
4) After the upgrade software detects the USB port and displays it, you can select the

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corresponding USB port and click to upgrade.
5) You can choose Chinese or English language, and choose if preserve the current setting data
when upgrade the radio.
6) The LED indicator flashes green during the upgrade, the radio displays the following interface：
7) Upgrade complete prompt;

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After upgrade completes, the software tools will display as below：
Note:
Don’t power off the radio during the upgrade.
If upgrade fails, please repeat the upgrade procedure.
8) Reboot the radio after upgrade to check if the firmware is the target version.
3.3CPS Software
1. CPS Software Installation Procedure
1) Start installation, double click to install;
2) Click Next following the prompt.

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3) Select ‘I Accept’ and click Next.

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4) Select Complete and click Next if you use the default installation path.
Select Custom and click Next if you choose your own installation path.

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Click Change to modify the installation path, then click Next.