Hytera RD98 Series User manual

Service Manual
Preface
This manual describes information related with product repair. To repair the product properly, please
read this manual carefully.
This manual is applicable to the following model:
RD98X (X may indicate 2, 5, 6 or 8.)

Service Manual
Contents
1. Revision History ...................................................................................................................................1
2. Copyright Information...........................................................................................................................2
3. Disclaimer.............................................................................................................................................3
4. Introduction...........................................................................................................................................4
5. Product Controls...................................................................................................................................5
Front Panel........................................................................................................................................5
Rear Panel........................................................................................................................................5
6. Baseband Section................................................................................................................................6
6.1 Front Panel..................................................................................................................................6
6.2 Main Board................................................................................................................................10
6.3 PCB View..................................................................................................................................23
6.4 Block Diagram...........................................................................................................................27
6.5 Schematic Diagram...................................................................................................................29
6.6 Parts List ...................................................................................................................................43
6.7 Troubleshooting Flow Chart ......................................................................................................77
7. Tuning Description..............................................................................................................................78
8. Interface Definition .............................................................................................................................79
9.UHF1 (400-470MHz) Information ........................................................................................................84
9.1 TX Circuit...................................................................................................................................84
9.2 RX Circuit..................................................................................................................................86
9.3 Frequency Generation Unit (FGU) ............................................................................................88
9.4 PCB View..................................................................................................................................90
9.5 Block Diagram...........................................................................................................................96
9.6 Schematic Diagram...................................................................................................................99
9.7 Parts List .................................................................................................................................108
9.8 Troubleshooting Flow Chart ....................................................................................................139
10. UHF2 (450-520MHz) Information ...................................................................................................144
10.1 TX Circuit...............................................................................................................................144

Service Manual
10.2 RX Circuit..............................................................................................................................146
10.3 Frequency Generation Unit (FGU) ........................................................................................147
10.4 PCB View..............................................................................................................................150
10.5 Block Diagram.......................................................................................................................156
10.6 Schematic Diagram...............................................................................................................159
10.7 Parts List ...............................................................................................................................168
10.8 Troubleshooting Flow Chart ..................................................................................................198
11.UHF3 (350-400MHz) Information.....................................................................................................203
11.1 TX Circuit...............................................................................................................................203
11.2 RX Circuit ..............................................................................................................................205
11.3 Frequency Generation Unit (FGU).........................................................................................206
11.4 PCB View ..............................................................................................................................209
11.5 Block Diagram.......................................................................................................................215
11.6 Schematic Diagram...............................................................................................................218
11.7 Parts List................................................................................................................................227
11.8 Troubleshooting Flow Chart...................................................................................................258
12.VHF (136-174MHz) Information ......................................................................................................263
12.1 TX Circuit...............................................................................................................................263
12.2 RX Circuit..............................................................................................................................265
12.3 Frequency Generation Unit (FGU) ........................................................................................266
12.4 PCB View..............................................................................................................................269
12.5 Block Diagram.......................................................................................................................275
12.6 Schematic Diagram...............................................................................................................278
12.7 Parts List ...............................................................................................................................287
12.8 Troubleshooting Flow Chart ..................................................................................................317
13. Disassembly and Assembly............................................................................................................322
14. Exploded View................................................................................................................................324
15. Packing Guide................................................................................................................................327
16. Specifications .................................................................................................................................328
17. Table of Blind Spots........................................................................................................................330

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1. Revision History
Version Date Description
R2.0 09-2010 Initial Release
R3.5 06-2011 VHF, UHF2 and UHF3 service information is included.

Service Manual
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2. Copyright Information
Hytera is the trademark or registered trademark of Hytera Communications Co., Ltd. (the Company) in
PRC and/or other countries or areas. The Company retains the ownership of its trademarks and product
names. All other trademarks and/or product names that may be used in this manual are properties of
their respective owners.
The product described in this manual may include the Company’s computer programs stored in memory
or other media. Laws in PRC and/or other countries or areas protect the exclusive rights of the Company
with respect to its computer programs. The purchase of this product shall not be deemed to grant, either
directly or by implication, any rights to the purchaser regarding the Company’s computer programs.Any
of the Company’s computer programs may not be copied, modified, distributed, decompiled, or
reverse-engineered in any manner without the prior written consent of the Company.
The AMBE+2TM voice coding technology embodied in this product is protected by intellectual property
rights including patent rights, copyrights and trade secrets of Digital Voice Systems, Inc. This voice
coding technology is licensed solely for use within this product. The user of this technology is explicitly
prohibited from attempting to decompile, reverse engineer, or disassemble the Object Code or in any
other way convert the Object Code into a human readable form.
U.S. Patent Nos. #6,912,495 B2, #6,199,037 B1, #5,870,405, #5,826,222, #5,754,974, #5,701,390,
#5,715,365, #5,649,050, #5,630,011, #5,581,656, #5,517,511, #5,491,772, #5,247,579, #5,226,084 and
#5,195,166.

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3. Disclaimer
The Company endeavors to achieve the accuracy and completeness of this manual, but no warranty of
accuracy or reliability is given. All the specifications and designs are subject to change without notice
due to continuous technology development. No part of this manual may be copied, modified, translated,
or distributed in any manner without the express written permission of us.
If you have any suggestions or would like to learn more details, please visit our website at:
http://www.hytera.com.

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4. Introduction
Intended User
This manual is intended for use by qualified technicians only.

Service Manual
5. Product Controls
Front Panel
No. Part Name No. Part Name
1 Accessory Jack 9 Slot 1 RX Indicator
2 Volume Control Knob / Power Indicator 10 Alarm Indicator
3 Repeater Mode Indicator 11 Programmable Key
4 Analog Mode Indicator 12 LCD Display
5 Slot 2 RX Indicator 13 Channel Up (CH+)
6 Slot 2 TX Indicator 14 Navigation Knob
7 Digital Mode Indicator 15 Channel Down (CH-)
8 Slot 1 TX Indicator 16 Speaker
Rear Panel
No. Part Name No. Part Name
1 TX Antenna Interface 6 Accessory Jack
2 Optional Interface 1 7 DC Power Interface
3 RX/Duplex Antenna Interface 8 Ethernet Port
4 Optional Interface 2 9 Ground Screw
5 Monitor/Tuning Interface
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Service Manual
6. Baseband Section
6.1 Front Panel
6.1.1 Overview
The front panel is the control panel, where you can see keys, Volume Control knob, Navigation knob,
LED indicator, LCD display and 10-Pin interface. The front panel is connected to the baseband board via
40-Pin FFC. See the following figure:
Figure 6-1 Front Panel Overview
6.1.2 Keys and Knobs
The keys on the front panel are controlled by key matrix of TX OMAP5912 (U102), and the Volume
Control knob and Navigation knob are controlled by GPIO of TX OMAP5912 (U102). See the following
figure:
KB_R0(G18)
KB_R1(F19)
KB_C0(F18)
KB_C1(D20)
KB_C2(D19)
TX OMAP5912
U102
GPIO4(P20)
GPIO6(P19)
GPIO46(W21)
GPIO49(L14)
GPIO26(AA9)
CH+/CH-
P1, P2, P3, P4
(2×3 Key matrix)
Volume control
knob
Menu navigation
knob
VOL_GPIO1
VOL_GPIO2
KNOB_A
KNOB_B
Baseband
Board
KNOB_C
Front
Panel
BOARD
Figure 6-2 Key and Knob Control Diagram for the Front Panel
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Service Manual
6.1.3 LCD Display
To enhance LCD refreshing rate, parallel data interface is used. It connects to EMIFS data bus of TX
OMAP5912 (U102) and the chip select is subject to the control of FLASH.CS2 . See the following figure:
6-3 LCD Control Diagram
6.1.4 LED Indicator
The 9 LED indicators on the front panel are controlled by the IO chip (U1), while the backlight of LCD
and keypad is controlled by the IO chip (U401) of baseband board. See the following figure:
GPIO42(W16)
GPIO56 (V15)
GPIO5(P3)
74HC594
U1
DAT
CLK
EN
TX OMAP5912
U102
DAT
CLK
EN
74HC594
U401
GPIO39(AA15)
S/P_DAT
S/P_CLK
LED_S/P_EN
PWR_LED_CTRL LOGIC
BASEBAND
BOARD
FNT BOARD
DIGITAL
TX-A
RX-A
TX-B
RX-B
ANALOG
RPT
ALARM
BACK LED_CTRL
PWR_LED_CTRL
Blue LED
Red LED
Green LED
Red LED
Green LED
Yellow LED
Green LED
Red LED
Backlight LED
Red and
Green LED
Figure 6-4 LED Control Diagram for the Front Panel
6.1.5 10-Pin Interface
The 10-Pin interface on the front panel is used to connect the audio accessory or data cable. Its
definition is as below:
Pin No. Name Description
1 Accessory identification port 1 To form an accessory identification
D7-FLASH.D0
FLASH.OE (U4)
FLASH.WE (W2)
FLASH.CS2 (M4)
FLASH.A1(J8)
OMAP5912
U102
LCD
Interface
J1
A
1
CS
WE
BOARD
Front
Panel
D07D0
−
Baseband
Board
BOARD
OE
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matrix with Pin 10.
2 PTT input 3.3V CMOS, valid for low level
3 Handset output This pin can output received audio,
when Handset is checked in the CPS.
4 USB0_D- When this pin is used for USB, USB of
DB26 will be disabled
5GND
For grounding
6 USB_VBUS 5V/500mA
7 Mic input MIC signal input of palm microphone
8 USB0_D+ When this pin is used for USB, USB of
DB26 will be disabled
9 HOOK Reserved
10 Accessory identification port 2 To form an accessory identification
matrix with Pin 1.
Table 6-1 10-Pin Interface Description
6.1.6 Interface between Front Panel and Baseband Board
The interface is used to connect baseband board and front panel. Its definition is as below:
Pin No. Name Description
1 MMP10_Mic_IN Mic signal input
2 MIC_GROUND Mic signal ground
3 MMP_ACC_IO1 Accessory detection input
4 V_BUS 5V power supply (USB)
5 MMP_PRGM_IO4 Programmable key input
6 MMP_PRGM_IO3 Programmable key input
7 USB0_D- USB data -
8 USB0_D+ USB data +
9 MMP_PRGM_IO0 Programmable key input
10 KNOB_A Navigation knob input
11 KNOB_B Navigation knob input
12 MMP10_SPK_AUDIO SPK signal output

Service Manual
13 VOL_GPIO1 Volume control knob input
14 VOL_GPIO2 Volume control knob input
15 KNOB_C Navigation knob input
16 BACKLED_CTRL Backlight control signal output
17 OUT_TX-RST LCD reset signal
18 KB_C0
19 KB_C1
20 KB_C2
Keypad matrix signal output
21 KB_R0
22 KB_R1 Keypad matrix signal input
23 DC_PWR_LED_CTRL DC power LED control
24 LED_S/P_EN IO chip select signal
25 S/P_CLK IO chip clock signal
26 S/P_DAT IO chip data signal
27 OE_LCD LCD read signal
28 WE_LCD LCD write signal
29 CS2_LCD LCD chip select signal
30 F_A1_LCD LCD command/data address selection
31 F_D7_LCD
32 F_D6_LCD
33 F_D5_LCD
34 F_D4_LCD
35 F_D3_LCD
36 F_D2_LCD
37 F_D1_LCD
38 F_D0_LCD
LCD data bus
39 GND For grounding
40 5V_GPS 5V power supply for front panel
Table 6-2 40-Pin Interface Description
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6.2 Main Board
6.2.1 Overview
Baseband board consists of main chip (TX OMAP and RX OMAP), audio processing chip (CODEC) and
peripheral equipment. See the following figure:
Figure 6-5 Baseband Block Diagram
As a highly integrated hardware platform, OMAP5912 incorporates 2 processors: ARM+DSP. The
function of RX OMAP and TX OMAP is described below:
RX OMAP5912
(1) ARM: Reserved.
(2) DSP: to handle the algorithm of RX baseband signal and to control SPI, McBSP1 and McBSP3
TX OMAP5912
(1) ARM: To run MMI software, part of stack software and related peripheral devices such as UART1,
UART3, USB, KEYPAD, LCD and LED.
(2) DSP: to handle the algorithm of TX baseband signal and to control SPI, McBSP1 and McBSP3
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Service Manual
6.2.2 Power Supply Description
Both PA circuit and baseband circuit are powered by the external power supply directly. The power
supply circuit for the baseband board supplies power for the baseband circuit and its auxiliary modules,
and provides 9.3V voltage for the exciter board and RX board. After the DC power supply is connected,
the baseband board is powered up, and provides 13.6V voltage for the external development interface
via OMPA control. See the following figure:
3V3A
5V_GPS
1V6D 900mA
B+
Bat Power
11V~15.6V TX Board
Filter and
Fuse Accessory
Connectory(1A)
13V6A(1A)
U821 (1A)
Receive Board
Exciter Board
U801
(3A) Accy Level
Translator
VBUS_SW500mA MMP/MMC_USB
OMAP DVDD
(1.2.3.5.6.7.8.9)DVddrtc
OMAP Perpherial
FLASH
Indication LED
DAC 5610/5604
Shift/store register BU4094BCFV
ADM8515 VDDIOǃAVDDǃVREF
TUSB1105 VCCǃVCCIO
VRTC
3V3D(1.2A)
CODEC Core
CODEC_VREF
SDRAM
OMAPDVDD4
1V8D(1A)
CODEC_DigIO
MAX3232
U807 U806 CODEC_AVDD
DSA321SDA
5VA
ADC U301
DAC U304
TPS72216DBVR
PMU U803
1V6A OMAP
CVDDA.CVCCDLL
GPS 5V
Front Panel Board
OMAP Core
CVDD1.2.3.RTC
Reserved for
CVDDA of OMAP
U802
(3A)
DCDC3
DCDC2
DCDC1
9V3A(1A)
Audio_OpAmP
RST MPU_RST
PWRON_RST
Figure 6-6 System Power Supply Block Diagram
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Service Manual
After going through the filter and protection circuit, the 13.6V power supply will power external devices
via the expansion interface. The current may be up to 1A. For the 9V3A power supply, it is supplied by
U821, and output by ADJ with current up to 1A. It is used to power part of the exciter, RX and baseband
circuit. The U821 output control pin is valid at low level, and is grounded. It can output 9.3V power after
power-on. As for U807, it receives 9V3A power and outputs 5V power, which powers the D/A conversion
chip and power management IC (U806). U806 supplies power (3V3A) for CODEC chip (U501). The
U807 output control pin is valid at high level. It can output 5V power after power-on.
U801 is a DC-DC chip with adjustable output. After receiving 13.6V power, it will output 5VD power,
which supplies U803 and USB with 5V power. U803 is a PMU chip. It has 3 DC-DC output pins and 2
LDO output pins. U803 is configured by OMAP via the I2C interface. Description of DC-DC pins is shown
below:
1) DC-DC1 is controlled by U803 (PIN10). When the level is 0/1, the DC-DC1 output will be 3V/3.3V.
The maximum current is 1.2A.
2) DC-DC2 is controlled by U803 (PIN32). When the level is 0/1, the DC-DC2 output will be 1.8V/2.5V.
The maximum current is 1A.
3) DC-DC3 is controlled by U803 (PIN1). It can output 1V6D power. The maximum current is 900mA.
6.2.3 Reset
When the system is powered on, PMU will generate a reset signal “PWR_RST” to reset RX OMAP and
TX OMAP. When the system works abnormally, the watchdog will generate a 220ms reset signal as well.
See the following figure:
OUT_TX-RST
CODEC_RST
OUT-RST
Figure 6-7 System Reset Block Diagram
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Service Manual
After making response to power-up reset, OMAP5912 will output RST_OUT signal, and maintain low
level for some time to reset the peripheral equipment (NOR Flash) of OMAP. For CODEC chip (U501),
its resetting is subject to MPUIO6 of TX OMAP. The reset sequence of OMAP5912 is shown below:
Figure 6-8 Reset Sequence
6.2.4 Clock
OMAP5912 requires two clocks: system clock and 32K clock. The system clock (12MHz, 13MHz or
19.2MHz) can be provided by an external oscillator or square-wave clock signal. This product’s system
clock is provided by 19.2MHz TCXO. Both system clock and 32K clock are provided by ULPD
(Ultralow-power device), which is responsible for OMAP clock management. The clock output by UPLD
is connected to appropriate external interface. See the following figure:
Figure 6-9 External Clock
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Service Manual
For the built-in and external clock of OMAP2912, there are two reset modes: Reset Mode0 and Reset
Mode1. Reset Mode0 is adopted for this system. As for this product, system clock uses external clock,
while 32K clock uses built-in clock. See the following figure:
Figure 6-10 Clock Connection Block Diagram
6.2.5 Memory
OMAP5912 provides two types of external memory interfaces: external memory interface slow (EMIFS)
and external memory interface fast (EMIFF). External NOR Flash and Mobile SDRAM have been
expanded for two OMAPs in the system. See the following figure:
6-11 Memory Block Diagram
6.2.6 MCBSP
OMAP5912 has 3 McBSP interfaces: McBSP1, McBSP2 and McBSP3. McBSP1 of RX OMAP and TX
OMAP is used to communicate with Codec. RX OMAP McBSP2 is used to connect SSI interface of
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Service Manual
AD9864 to receive demodulation signal from AD9864, and TX OMAP McBSP2 is reserved for SPI
interface of RX DAC TLV5614. McBSP2 of TX OMAP is used to connect SSI interface of TX DAC
TLV5614. TLV5614 works in Slave mode and is managed by DSP. McBSP3 is used to connect RX
OMAP and TX OMAP for data transmission. See the following figure:
Figure 6-12 Diagram of MCBSP Connection
6.2.7 SPI
OMAP5912 has one SPI interface that can connect four SPI components. The descriptions are as follow:
(1) RX OPMAP5912 SPI Interface
The SPI interface of RX OMAP is used to configure IF processor (AD9894) and RX PLL chip
(SKY72310).
AD9894 is controlled by SPI chip select (CS1) of RX OMAP, and RX PLL chip is controlled by CS2. The
connection between RX OMAP SPI interface and AD9894/ RX PLL is shown below:
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Service Manual
CS
SKY72310 SCK
Data
3V3D
3V3D
PE
AD9864 PC
PD
SPIF.CS2(T19)
SPIF.SCK(U19)
SPIF.DOUT(R18)
RX OMAP5912
U202
SPIF.CS1 (N15)
Figure 6-13 RX OMAP SPI Connection Block Diagram
(2) TX OPMAP5912 SPI Interface
TX OMAP SPI is used to configure RX DAC TLV5614 (U303) and TX PLL chip (SKY72310). This chip is
controlled by CS2 and managed by DSP. RX DAC (U303) is controlled by CS1. See the following figure:
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Figure 6-14 TX OMAP SPI Connection Block Diagram
6.2.8 MCSI
MCSI (Multi Channel Serial Interface) belongs to OMAP5912. There are two MCSIs with OMAP5912.
MCSI1 of RX/TX OMAP is reserved for appropriate RX/TX PLL chip to realize modulation feature. See
the following figure:
sKY72310 SPIF.CS2(T19)
SPIF.SCK(U19)
CS
CLK
Data SPIF.DOUT(R18)
OMAP5912
U102
SPIF.CS1(N15)
FS
CLK
RX TLV5614 Data

Service Manual
CS MCSI1.SYNC(W8)
MCSI1.CLK(M15)
TX/RX SKY72310 SCK
Data MCSI1.DOUT(Y8)
TX/RX OMAP5912
Figure 6-15 Diagram of MCSI Interface
6.2.9 I2C
OMAP5912 provides one I2C interface, and supports communication rate up to 400Kbps. TX OMAP I2C
interface connects with PMU to dynamically adjust PMU voltage output. It works in Master mode. See
the following figure:
TX OMAP5912
U102
I2C.SDA
˄
V20
˅
I2C.SCL
˄
T18
˅
SDAT U803
SCLK
Figure 6-16 Diagram of I2C Connection
6.2.10 MICROWIRE
OMAP5912 provides a MICROWIRE interface. The four chip select signals can drive four external
components. MICROWIRE interface signals include: ȝWIRE.CS, ȝWIRE.SCLK, ȝWIRE.SDO and
ȝWIRE.SDI.
In this system, only MICROWIRE interface of TX OMAP is used to connect CODEC and ADC TLV1548.
ȝWire CS0 controls CODEC and ȝWire CS3 controls ADC TLV1548. See the following figure:
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