Kirisun PT8000 Service Manual
PT8000
SERVICE MANUAL
VHF/UHF MOBILE RADIO
V071215
PT8000 SERVICE MANUAL
DANGEROUS!!
Do not connect AC power or the DC power that
exceeds the specified input value with any
connector or terminals of the radio. Otherwise it will
cause fire or electric shock.
WARNING!
Do not reverse power connection.
It may cause harm to the radio if signal input on the
antenna connector is bigger than 20 dBm (100mW).
Do not turn on the power before the antenna or load
connection is completed.
If the antenna has been damaged, do not use the radio.
Damaged antenna may cause tightly burning on skin.
CONTENTS
Chapter 1 Introduction.......................................................................2
Chapter 2 Radio Overview.................................................................3
Chapter 3 Circuit Introduction............................................................3
Chapter 4 Mode Introduction.............................................................7
Chapter 5 Maintenance, Assembly and Disassembly........................8
Chapter 6 Overall Debugging..........................................................10
Chapter 7 Main T echnical Indexes...................................................13
Chapter 8 Trouble Shooting Guide..................................................13
Appendix 1 Abbreviations................................................................14
Appendix 2 Electronic components list............................................14
Appendix 3 Framework components list..........................................18
Appendix 4 Accessories..................................................................19
Appendix 5 PT8000 Spare Mechanical Part BOM...........................20
Figure 1 PT8000 Schematic Circuit Diagram...................................21
Figure 2 PT8000 Main Board Schematic Circuit Diagram................22
Figure 3 PT8000 T op Main Board Position Mark Diagram...............23
Figure 4 PT8000 Bottom Main Board Position Mark Diagram..........24
Figure 5 PT8000 Keyboard Schematic Diagram............................. 25
Figure 6 PT8000 T op Keyboard Position Mark Diagram..................26
Figure 7 PT8000 Bottom Keyboard Position Mark Diagram............27
It's better to avoid putting it in rain or snow, or any other
liquid to ensure its life and performance.
STATEMENT!
Kirisun Electronic (Shenzhen) Co., Ltd owns the copyright
of KSP8000 software.
Unauthorized Duplication of KSP8000 software is strictly
prohibited.
Kirisun Electronic (Shenzhen) Co., Ltd owns the copyright
of the MCU software.
Kirisun Electronic (Shenzhen) Co., Ltd owns the copyright
of the radio outward/structure/circuit design.
Kirisun Electronic (Shenzhen) Co., Ltd owns the copyright
of this service manual. Unauthorized publication is
prohibited.
Kirisun Electronic (Shenzhen) Co., Ltd owns the
trademarks KIRISUN , , .
1
PT8000 SERVICE MANUAL
Chapter 1 Introduction
Installation Condition
1.Unpack
1.1 Introduction
This manual applies to the service and maintenance of PT8000 series of
FM mobile radio, and is designed for the engineers and professional
technicians that have been trained by our company. In this manual you
can find all the information of product service. Kirisun reserves the rights
to modify the product construction and specification without notice in
order to enhance product performance and quality. You can also log on
our website www.kirisun.com to download the latest service manual or
contact your local dealer or us.
Read this manual before repair the product.
1.2 Service Precautions
Please check the host in the package and the supplied accessories in
the following table before using. Any articles are found lost or damaged,
please contact the distributor without delay.
Accessories
Fixed bracket
Power Cable
Hand Microphone
Microphone Hanger
M4*10 Combination Screw
M4*16 Self-tapping Screw
M5*16 Self-tapping Screw
Instruction Manual
Quantity
1
1
1
1
4
2
4
1
Safety
Avoid skin contacting with the antenna connector and PCB.
Do not reverse the power polarities.
If signal input is bigger than 20dBm (100mW) it may cause damage to
the radio.
Do not turn on the power before the antenna and load connection is
Microphone Hanger
Power Cable
Fixed bracket
completed.
Do not use the radio if the antenna has been damaged. Contact the
damaged antenna will cause lightly burning on the skin.
Repair service can only conducted by professional technicians.
Electromagnetism Interference
It's prohibited to use or repair the radio in the following places:
Hand Microphone
M4*10 Combination
Screw
M5*16 / M4*16
Self-tapping Screw
Hospital, health center, air port
Any area with a potentially explosive atmosphere (where the air contains
gas, dust and smog, etc.), such as the storage or transportation facilities.
Any area of dynamite or exploder.
Change Components
All the components use in repair service should be supplied by
Kirisun.
Other components of the same models available on the market are not
surely able to use in this product and we do not guarantee the quality of
the product using such components.
Please fill in the following forms if you want to apply for any components
from Kirisun.
Component Application
Radio M o del/
Model
PT-8000 2
PT-8000 2
Compo
nent
ChipFET
Triode
Chip
No.
Q3
Q49
pecifications
S
RD01MUS1
2SC5108 Y
Mat e r i a l Serial
No.
105-RD01MU-R01
104-SC5108-R0111
Qua
ntity
2. Licenses
Rules require that the radio installation point (mobile station or base
station) needs permission license. The license carrier guarantees that
the RF power, frequency and frequency deviation comply with the
license requirements. The radio assembling or operation must be
conducted by the license-authorized technicians.
3. Installation Preparation
3.1 Description
Every radio has been adjusted and checked before the shipment. Before
installation it's better to check if the radio transmitting or receiving is
normal to make sure its proper operation.
3.2 Test
Connect all the cables and accessories to test the radio.
Transmitter frequency, deviation, and power output should be
checked, as should receiver sensitivity, squelch operation, and
audio output. Signlling operation should be verified.
4. Installation Steps
1.3 Service
All the Kirisun products are subject to the service warranty.
After-sales service will be provided, and the length of warranty is stated by
Kirisun. The radio and its accessories are all in the warranty. However, in
one of the following cases, charge free service will be not available.
No valid service warranty or original invoice.
Malfunction caused by disassembling, repairing or reconstructing the
radio by the users without permission.
Wearing and tearing or any man-made damage such as mechanical
damage, burning or water leaking.
Product serial number has been damaged or the product trademark is
difficult to identify.
After the warranty expires, lifetime service is still available. And we also
provide service components to service stations and service staff.
4.1 Introduction
Check the car and decide how and where to install the radio antenna
and accessories. Allocate the cable in a proper place to avoid pressing
or squeezing it. And pay attention to the heat scattering of the radio
equipments.
4.2 Antenna
The most ideal place for antenna is the center of an open and flat
conduction region. It usually at the center of the car top or at the top of the
luggage cabinet. Stick the ground wire at the top of the luggage cabinet
and the car outer shell and make sure to connect the luggage cabinet with
the ground.
4.3 Connection of Power Cable
First of all, please check whether there is a hole for the power cable
on the insulating board. If no, please bore the board with the suitable drill
bit and fix a rubber grommet on it.
Afterwards, please have the cable pass through the insulating board
and lead from the car into the car engine. Connect the re
conductor to the
positive terminal of the accumulator and the black conductor to the
negative terminal.
2
PT8000 SERVICE MANUAL
1
2
3
4
ANT
ANT SW RF AMP
MCF
49.95MHz
IF SYSTEM
CF1
450KHz H
CF2
450KHz F
X3 multi ply
AF AMP
TCXO
16.8MHz
MIC AMPPLL VCOTX AMPPA AMP
RX
TX
At last, ring the remained conductor and fix it.
Note: Please maintain the sufficient relaxation of the power cable to
make it convenient to dismantle the radio in the state of power
connection.
4.4 Radio Installing
Warning: For passengers' safety, please fix the radio firmly on the fixed
bracket so that the radio will not be loosened in case of collision.
The fixed bracket is taken as an example. Draw the position and drill a
hole on the instrument panel first, and then install the fixed bracket with
4 M5*16 self-tapping screws. (Note: please fix the radio at the position
convenient for operation and control, and leave an enough space for fixation
and connection of the cable.)
Slide the radio into the fixed bracket and fix it with 4 M4*10 combination
screws (plus plain washer and spring washer). (Different combinations of
fixing holes are selectable to adjust the radio to the proper height and visual
angle.)
Connect the antenna and the power cable to the radio.
Install the microphone hanger at the position easy to use, with 2 M4*16
self-tapping screws. (The microphone and its cable should be fixed at the
position not affecting safe driving.)
Connect the microphone to the microphone jack on the front panel of the
radio and put it on the hanger.
Note: When replacing the protective tube for the power cable, please
use the one of the same specification without fail. It is not allowed to
change it into the tube of higher capacity.
4.5 If you do not intend to use the external speaker, fit the supplied
speaker-jack cap to stop dust and sand getting in.
Display
SCAN indicator
LOW indicator
8.
2.3 Rear Panel
Description
Scan indication: on when scan is enabled.
Power level indication: on when in low power.
Indicates the current channel in normal use, ranging
from 1~8.
Indicates the current squelch level when squelch
selection is enabled ranging from 0.~9.
Displays b when Public Address is enabled.
Displays - when the radio has no channel.
Displays u when the radio is in the remote stun status.
Displays h when the radio is in the remote kill status.
Displays P when the radio enters the PC
Programming Mode.
Displays t when the radio enters the PC Adjustment
Mode.
Displays C when the radio enters the Wired Clone
Mode
Chapter 2 Radio Overview
2.1 Description of External View
power button
Press this button for a
long time (more than
1.5 seconds) to switch
the radio on/off.
LED indicator
The red indicator will light
while transmitting; the green
indicator will light when it receives the carrier.
/ button (programmable button)
Display screen
For details, see Display .
Volume Control knob
To be used to adjust volume.
Microphone/Programming Interface
P1button (programmable button)
P2 button (programmable button)
P3button (programmable button)
PTT button (on the hand microphone)
Press the PTT button first, and then speak to the
microphone to transmit the voice to the other. Loosen to receive.
2.2 Display Screen
8
P1 P2 P3
8
Antenna Interface
Power Interface
External Speaker Interface
Chapter 3 Circuit Principles
3.1 Frequency Structure
Figure 3.1 Frequency Chart
The receiver adopts quadric mixing mode. The first IF is 49.95MHz, and
the second IF is 450kHz.
The first local oscillation signal of the receiver is produced by frequency
synthesizer and the second local oscillation signal is produced by X1 THG.
The signal of transmitter is produced by frequency synthesizer.
The reference frequency of frequency synthesizer is produced by TCXO.
3.2 Principles of Receiver RX
Figure 3.2 Schematic Diagram for Receiver
3
PT8000 SERVICE MANUAL
Front End of Receiver
Signals from the antenna are filtered by BPF which consists of two-LC via
RX/TX switch (D3 D11). After being filtered out the useless out-of-band
signals, the signals are amplified by LNA consisting of Q18 and external
components.
Signals from LNA are filtered again by BPF which consists of three-LC
before entering the 1st mixer (Q19).
AGC Circuit
It consists of Q16 and peripheral circuit. AGC will work to reduce the gain
of Q18 only when the input signal is oversize.
1st mixer
The first IF (49.95MHz) signal is produced after mixing of the receiving
signal from LNA and the 1st local oscillation signal from frequency
synthesizer.
IF Circuit
The first IF signal is filtered out adjacent channel and other useless signals
by crystal filter (XF1).
The first IF signal from crystal filter is amplified by the first IF amplifier (Q20)
before processing of IC in IF( IC6 TA31 136).
IF IC consists of the 1st mixer, IF amplifier, limiter, frequency discriminator,
noise amplifier, audio low pass filter.
Signals (16.8MHz) from X1 are amplified by Q1 1 and peripheral circuit and
then generate the second local oscillator (50.4MHz). The second IF signals
(450kHz) a re generated after signals mixing of the second local oscillation
(50.4MHz) and the first IF (49.9 5MHz) in IC6. Audio signals are demodulated
and outputted by IC6 after the second IF signals are amplified and limited
in IC6 and then filtered by ceramic filter(CF1 or CF2 450kHz).
The second IF filter selective circuit consists of CF1, CF2, D20, D21 and
peripheral circuit. When vehicle station is set on broadband, CF2 is
connected and CF1 is cut off; when it is narrowband, CF1 is connected
and CF2 is cut off.
Squelch Circuit
Signals demodulated by IC6 are amplified by noise amplifier of IC6 and
then amplified further by Q21. After that, the signals are demodulated by
D25, and then the generated DC level enters squelch circuit controlled by
MCU. The voltage is in inverse proportion to the input signals.
3.3 Principles of Transmitter (TX)
Transmitter Power Amplifier
8T 8R
Q5
VCO
TX/RX SW
Q4
RF AMP
8T
PRE
DRIVE
8T
13.8V
IC1
RA30H
ANT SW
8T
LPF
IC4
APC CONTROL
TO ANT
APC
Figure 3.3 Schematic Diagram
for Power Amplifier and Antenna Switch
The modulated RF signals from VCO are amplified by Q1, Q2, Q4 and Q5
before the power amplification in IC1. IC1 Output Power: 25W
Gate bias of IC1 is controlled by APC circuit, so the output power of
transmitter can be controlled conveniently by changing the gate bias voltage.
APC Automatic Power Control Circuit
The output power of RF power amplifier is detected and converted into DC
level by RF detector diode (D9, D10). The DC level is then compared with
signals from MCU and amplified in IC4 before power output control in Ic1
gate.
The voltage detected by detector diode will increase with oversized output
power of transmitter. When the output voltage of IC4 decreases, the bias
4
voltage of IC1 will decrease, finally the output power of transmitter will
decrease or vice versa. Thus, the output power of transmitter will keep stable
under any different working condition.
MCU can set the power by changing the voltage input to IC4.
3.4 Principles of Frequency Synthesizer
Q7
BUFF
Q1 Q2
BUFF
RF AMP
5V
2ND LOCAL
VCO OUT
UL
CK
DT
UL
QT TCXO
IC3
PLL IC
MB15E03SL
X1
TCXO
16.8MHz
*3 2ND LOCAL AMP
5V
Q6
TX
LOOP FILTER
3. 5V
Q14
RIPPLE
5V
FILTER
Q11
8R
VCO
VCO
MOD
Q14
RX
Figure 3.4 Schematic Diagram for Frequency Synthesizer
The PT8000 adopts PLL frequency synthesizer.
Frequency synthesizer consists of reference oscillator, voltage controlled
oscillator (VCO), programmable frequency divider (PFD), phase comparator
and low pass filter (LPF).
Transmitting VCO Unit consists of Q6, D1, D4, D5 and D6, etc. D8 is the
modulation circuit of transmitting VCO.
Receiving VCO Unit consists of Q12, D14, D16, D17 and D18, etc.
IC3 (MB15E03SL) is PLL integrated circuit and contains programmable
parametric frequency divider (PPFD), programmable frequency divider
(PFD), phase comparator and charge pump, etc.
Low pass filter consists of R54, C113 and so on.
Reference frequency is provided by X1(TCXO, 16.8MHz).
Reference frequency of TCXO (Temperature-controlled Crystal Oscillator)
is divided by PPFD in IC3 to produce reference frequen cy of 5kHz or 6.25kHz
(controlled by MCU based on the set channel frequency).
The oscillation frequency of VCO is compared with reference frequency to
produce error signal after divided by PFD in IC3. The error signal is filtered
by low pass filter before changing the VCO frequency to the set value in
VCO (it is locking).
Lock lost detection: When PLL is out of lock, IC3 pin14 will output low level
signal to MCU and then MCU prohibit transmitter from transmitting with a
warning tone.
3.5 Audio Processing Circuit:
IC8A IC8BIC8CIC8D
AMP LP LP AMP
IC6
IC9C IC9BIC9AIC9D
AF OUT
AMP HP LP LP
IC13D IC13AIC13BIC13C
MOD
LP LP IDC AMP
CTCSS/DCS
Q26
8R
HP
IC10BIC10A
2T
AMP
HP
IC5
DTMF
DECODER
Q33
SW
D0
D1
D2
D3
DV
MUTE
IC7
AF POWER AMP
TDA1519C
VR1
10K
J1 SPK
SPEAKER
MIC
Figure 3.5 Schematic Diagram for Audio Processing Circuit
MIC Signal Processing:
Voice signals from MIC are amplified in IC13A (IC13A composes the AGC
circuit with D32 and Q32 to increase the dynamic range of the circuit), and
then sent to IDC circuit composed by IC13B after the pre-emphasis of C322
and R267. The limited signals are switched broad/narrowband in Q30 and
then filtered signals over 3000Hz in the two-level low pass circuit composed
by IC13C a nd D. Then the filtered signals are modulated to transmitting VCO
by D8 after frequency offset adjustment in VR2.
PT8000 SERVICE MANUAL
Receiving Audio Signal Processing:
Audio signals from IC6 are classified into two groups. One group is amplified
and filtered in low pass circuit composed by IC8 (for audio signal), then the
relatively purified CTCSS/DCS signals are sent to MCU for p rocessing; the
other group is amplified by IC9C in IC9 (Q29 is gain s switch circuit used for
the volume switch of broad/narrowband), after that, one group is sha ped to
better square signal in two-tone shaping circuit composed by IC10, and then
sent to MCU for two-tone signal test; the other group is filtered CTCSS
signals in high pass circuit composed by IC6 D and then sent to the
de-emphasis circuit composed by R173 and C245, after that, the signals,
through the two-level low pass circuit (composed by IC9A and D) and high
pass circuit (composed by Q26), are amplified to make the speaker work
in IC7 after volume adjustment by the volume switch.
Speaker Impedance: 16ohm
Caution: Neither end of the speaker can be grounded!
Emergency alarm tone has no volume limitation.
3.6 Power Supply:
The station use 13.8V battery, while transmitter amplifier circuit (IC1) and
receiver audio amplifier (IC7) use battery directly for power supply.
IC17: 5V LDO, micro-power voltage stabilizer. Supply power for units such
as MCU, IF processing and frequency synthesizer.
IC16: 8V LDO, micro-power voltage stabilizer.
Q38: 8T switch (controlled by MCU)
8T: supply power for the front end of transmitter
Q40: 8R switch (controlled by MCU)
8R: supply power for the RF amplification and mixing units of receiver.
3.7 MCU Unit:
MCU Unit controls the operation of every unit to realize all functions of the
PT8000.
Communication with external PC
State data access
Control PLL for the generation, receiving and transmitting of local oscillation
frequency
Access to the current channel state
Control LED status indicator
Control power supplied condition of every unit
Detect action of every function key
Produce CTCSS signal
Produce DCS signal
Produce power controlled signal
Finish CTCSS decoding
Finish DCS decoding
Squelch detection and control
Control voice prompt content
Memory (E2PROM, AT24C08)
Channel data, CTCSS/DCS data and other function setting data and
parameter adjustment data.
CTCSS signals produced by MCU (PWM waveform) are sent to VCO for
modulation after filtered the HF components over 300Hz in low pass filter
composed by RC.
Table 3.1 CTCSS Frequency Table
Frequency
No.
[Hz]
67.0
1
69.3
2
71.9
3
74.4
4
77.0
5
79.7
6
82.5
7
85.4
8
88.5
9
91.5
10
DCS signaling
DCS (Digital code squelch), is a kind of continuous digital code modulated
on carrier with voice signal and used for squelch control. If DCS function is
set, the speaker is available only when receiving the same DCS code to
avoid the disturbance of useless signals.
The station has 83 kinds of standard codes including positive and inverse
code for your selection, such as Table 2.
DCS signals produced by MCU (PWM waveform) are sent to VCO and
TCXO for modulation (the HF components of DCS signals are modulated
by VCO, while the LF components by TCXO) after filtered the HF components over 300Hz in low pass filter composed by RC.
CTCSS/DCS signals from receiver are sent to MCU for decoding, and then
MCU test if there are DCS codes with the same setting of the station to
decide whether open the speaker or not.
Table 3.2 DCS Coding Schedule
023
114
025
115
026
116
031
125
032
131
043
132
047
134
051
143
054
152
065
155
071
156
072
162
073
165
074
172
Frequency
No.
[Hz]
94.8
11
97.4
12
100.0
13
103.5
14
107.2
15
110.9
16
114.8
17
118.8
18
123.0
19
127.3
20
174
205
223
226
243
244
245
251
261
263
265
271
306
311
315
331
343
346
351
364
365
371
411
412
413
423
431
432
No.
21
22
23
24
25
26
27
28
29
30
445
464
465
466
503
506
516
532
546
565
606
612
624
627
Frequency
[Hz]
131.8
136.5
141.3
146.2
151.4
156.7
162.2
167.9
173.8
179.9
631
632
654
662
664
703
712
723
731
732
734
743
754
No.
31
32
33
34
35
36
37
38
39
Frequency
[Hz]
186.2
192.8
203.5
210.7
218.1
225.7
233.6
241.8
250.3
CTCSS/DCS signal coding and decoding:
CTCSS/DCS signals from MCU (pin12 output, PWM wave) are sent to VCO
and TCXO for modulation after the balance adjustment by VR1.
CTCSS/DCS signals from receiver are sent to MCU for decod ing, and then
MCU test if there are CTCSS/DCS signals with the same setting of the
station to decide whether open the speaker or not.
CTCSS
CTCSS (continuous tone control squelch system, hereinafter referred to
as CTCSS), is a kind of squelch control systemwith modulation on carrier
and continuous sub-audio signals as pilot tone. If CTCSSfunction is set,
the call is available only at the same CTCSSfrequency of both receiving
and transmitting parties to avoid the disturbance of othersignals.
Thestation has 39groups of standard CTCSS frequencyfor your selection,
such as Table1.
3.8 Description of Semiconductor Devices
MCU Description
Table 3.3 Port Description of Microprocessor (R5F212A8)
Port name
O.
N
IGN
1
EXT-ALARM
2
MODE
3
SCL
4
SDA
5
RST
6
XOUT
7
VSS
8
XIN
9
Pin Name
P33
P34
P43
P44
I/O
Function
I
Reserved
I
External Alarm Input
I
Connect resistor of 4.7K with VCC
O
EEPROM Clock Line
EEPROM Data Line
I/O
Reset Input
I
Oscillator
O
Grounding
-
Oscillator 7.3MHz
I
5
N Port name Pin Name I/O Function
O.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
CLK
36
INT
37
TXD
38
RXD
39
BLC
40
8TC
41
8RC
42
APC/TV
43
SBC
44
TXGSW
45
P A
46
AF_MUTE
47
MIC_MUTE
48
AFCO
49
TI
50
RSSI
51
BUSY
52
TEMP
53
KEY2
54
KEY1
55
PTT
VCC
SHIFT
TO0
TO1
DEV1
DEV2
SCNLED
LOWLED
GLED
RLED
UL
CK
LE
DT
DTMFD0
DTMFD1
DTMFD2
DTMFD3
DTMFDV
RX
MICDAT
T2IN
HOOK
LEDC
DATA
P54
P53
P52
P51
P50
P27
P26
P25
P24
P23
P22
P21
P20
P17
P16
P15
P14
P86
P85
P84
P83
P82
P81
P80
P60
P45
P66
P67
P65
P64
P63
P31
P30
P36
P32
P13
P12
P11
P10
P00
P01
P02
P03
P04
P62
O
O(PWM)
O(PWM)
O
O
O
O
O
O
I
O
O
O
I
I
I
I
I
O
I
I(TRFI)
I
O
O
O
I
O
I
O
O
O
O(PWM)
O
O
O
O
O
O
I(A/D8)
I(A/D7)
I(A/D6)
I(A/D5)
I(A/D4)
I(A/D3)
I
CPU Power 5V Input
Clock Beat Frequency Shift
HOn
QT/DQT Output
QT/DQT Output
Max Frequency Compensation
(four frequency band)
Scanning Indicator Light H on
Low-power Indicator Light H on
Receiving Green Indicator Light
Hon
Transmitting Red Indicator Light
Hon
PLL Lock Detection Pin
H: Locking L: Out of Lock
PLL Clock Output
PLL IC Enable Pin H: Locking
PLL Data Output
DTMF Detection Input
DTMF Detection Input
DTMF Detection Input
DTMF Detection Input
DTMF Decoding Effective Input
TX/RX VCO Selection
HTX LRX
Preservation: Digital Keyboard
Microphone Data Input
Reserved: 2TONE Detection
Output
Hang Signal Input, Connect
R0ohm with RXD
LED Display Control
H Effective
LED Display Control Data
LED Display Control Clock
Power Detection Input
RS-232C Output
RS-232C Input
Reserved
Transmitting Power Control
H: on
Receiving Power Control
H: on
TX: Automatic Power Control
Output
RX: BPF Tuning Output
Main Power Switch Control H: on
Transmitting Gate Control
L: Transmitting
PA Control H: PA
Mute Control L: AF Mute
Mute Control H: Mic Mute
Audio Power Amplification Control
L: Power Amplification
QT/DQT Signal Input
Signal Strength Input
Busy Signal Input
Power Amplification Temperature
Protection Input
Keyboard Entry
Keyboard Entry
Press [PTT] to input, Connect
R0 ohm with TXD
6
PT8000 SERVICE MANUAL
N Port name Pin Name I/O Function
O.
NC
56
NC
57
VCCN
58
AVSS
59
DTMF
60
VREF
61
AVCC
62
MAXAF
63
WNTC
64
3.4 Functional description of semiconductor device
Item Model Function Description
HT9172
IC5
PST9140NR
IC12
NJM2902V
IC13
MB15E03SL
IC3
NJM2904
IC4
TA31136
IC6
NJM2902
IC9
NJM2902
IC8
R5F212A8
IC11
AT24C08
IC15
TDA1519C
IC7
RA30H
IC11
NJM78L05
IC17
TA7808S
IC16
DTC144EE
Q9
2SK508NV
Q12
2SC4617
Q14
2SC5108
Q11
2SK1829
Q16
3SK318
Q18
3SK318
Q19
2SC5108
Q1
2SC5108
Q20
2SC4617
Q21
DTC144EE
Q22
Q23
DTA144EE
Q29
DTA144EE
Q30
2SK1824
Q27
DTC144EE
Q33
2SK1824
Q45
2SK1824
Q28
DTC144EE
Q35
DTA144EE
Q40
KTA1298
Q1
2SC5108
Q38
KTA1298
Q32
2SC4919
Q4
2SC3357
Q5
2SC3357
Q46
2SK1824
P06
P07
P37
P35
O(D/A0)
O(D/A1)
-
O
O
DTMF Decoder Chip
MCU Reset Circuit
MIC Amplification, Limitation, Filtering
Frequency Synthesizer
APC, Voltage Comparison, Driving
Receiver 2nd Local Oscillation, 2nd IF Amplification,
Limitation, Demodulation, Noise Amplification
Receiver demodulated signal Amplification, Filtering
Receiver CTCSS Signal Amplification, Filtering
MCU
E2PROM, Channel Frequency Data Storage,
Function Setting Parameter, Debug Mode Parameter
Audio Frequency Power Amplification
Transmitter Final Power Amplification
5V Voltage Regulation Input
8V Voltage Regulation Input
APC Control Switch
Receiving VCO Oscillation Circuit
VCO Power Filters
Receiving 2nd Local Oscillation Frequency
Multiplier Circuit
Receiving High Power Amplification Gains
Control Switch
Receiver High Power Amplification
First Level Mixer
VCO Buffer Amplifier
1st IF Amplifier
Receiver Noise Amplifier
Broad/narrowband Noise Switch
Receiving Broad/narrowband Frequency Switch
Receiving Broad/narrowband Switch
Transmitting Broad/narrowband Switch
Beat Frequency Control Switch
Receiving Audio Mute Switch
Receiver Audio Output Switch, Disconnection
on Emergency
Audio Power Amplification Control Switch
MIC Power Switch of Amplification Unit
8R Switch
VCO Buffer Amplifier
8T Switch
MIC AGC Control Switch
Transmitter 1st Amplification
Transmitter 2nd Amplification
Receiver Audio Output Switch, Connection on
Connect Pull-down Resistor
with VSS
Connect Pull-down Resistor
with VSS
Frequency Voltage Regulation
Output VCCN
Connect with VSS
D/A Output: DTMF/BEEP Output
Connect with AVCC
CPU Power 5V Input
Alarm Max Volume Control Switch
H: Controlled by Volume Switch
L: Max Volume at Emergency Alarm
Broad/narrowband Control
H: Broad L: Narrow
PT8000 SERVICE MANUAL
Item Model Function Description
Emergency
Q6
Q3
Q7
Q13
2SK508NV
2SC4116
2SC5108
2SC4116
Transmitting VCO Oscillation Circuit
Transmitting VCO Control Switch
VCO Buffer Amplifier
Receiving VCO Control Switch
Table 3.5 Functional description of Diode
Item Model Function Description
D3 D11
D12
D14 D16
L709CE
MA2S111
HVC376
Transmitter antenna switch diode
Lock Lost Detection Diode
Receiving VCO Oscillation Varactor Diode
D17 D18
D16
D17
D18
D7
D2 D19
D20 D21
HVC376
HVC376
HVC376
HZU5ALL
HSC277
DAN222
Receiving VCO Oscillation Varactor Diode
Receiving VCO Oscillation Varactor Diode
Receiving VCO Oscillation Varactor Diode
APC Output Voltage-limiting Diode
VCO Output Switch
Receiving 2nd IF Filter Broad/narrowband
Switch
D8
D23
D25
D27 D28
HVC376
HVC355B
MA742
HVC376B
Transmitting VCO Oscillation Varactor Diode
Receiving BPF Varactor Diode
Noise Demodulation
Receiving BPF Varactor Diode
D26 D30
D29
D32
D1 D4
1SS372
HVC376
1SV278
MIC AGC Detection Diode
Transmitting VCO Oscillation Varactor Diode
D5 D6
D8
Transmitting VCO Modulation Diode
Table 3.6 Characteristic of XF1 crystal filter
Item Rated Value
Nominal center frequency
Transmission band width
40dbstop band width
Ripple
Insertion loss
Ensure attenuation
Terminal impedance
49.95MHz
7.5khz or higher, but within 3db
20.0khz or lower
1.0db or lower
3.0db or lower
80db or higher, but between f0-910khz
330
Chapter 4 Mode Introduction
Mode combinations
Mode Function How to access
User Mode For normal use Power on
Data
Programming
PC
mode
Mode
Test Mode
Reading and writing
frequency data and
other functions
Used to tune the radio
using the PC.
Firmware
Programming
Mode
Wired Clone
mode
Upgrades the software
when new features are
added
Used to transfer programming data from one
radio to another.
User Mode
You can enter User Mode (conventional communication mode) by turning
on the power switch. Users in the mode can use the de fined function of the
vehicle station.
Data programming mode:
Before leaving the factory, the radio has been set in factory. However, due
to different requirements of users, functional parameters of the radio like
working frequency, channels, CTCSS/DCS and auto scanning, etc. Should
be reset. Therefore, the company has specially designed a set of Chinese
/English programming software KSP8000 with friendly interface, convenient operation and visualized display for setting functional parameters of
the radio.
Steps for setting the functional parameters of the radio by PC are as follows:
A. Install KSP8000 on the PC.
B. As shown in the figure below, connect the radio and the serial port of the
PC with the special programming cable KSPL-05
Pesonal
to an RS-232c port
DB9 female plug
computer
Receive instructions
from the PC
Receive instructions
from the PC
Press button P3 for over
2 seconds and connect
the power at the same
time; Receive instructions
from the computer
Press button P1 for over
2 seconds and connect
the power at the same
time.
to the antenna
connector
DC power supply
13.8V/7A
to DC cable
Table 3.7 Performance and characteristic of CF1 LTWC450H
Item Rated Value
Nominal center frequency
6db band width
50db band width
Ripple
Insertion loss
Ensure attenuation
Terminal impedance
450kHz
3.0khz or higher
9.5khz or lower
2.0db or lower, but between f0 4kHz
6.0db or lower
47.0db or higher, but between f0 100kHz
1.5k
Table 3.8 Performance and characteristic of CF1 LTWC450F
Item Rated Value
Nominal center frequency
6db band width
50db band width
Ripple
Insertion loss
Ensure attenuation
Terminal impedance
450kHz
6.0khz or higher
12.5khz or lower
2.0db or lower, but between f0 4kHz
6.0db or lower
47.0db or higher, but between f0 100kHz
1.5k
to the MIC connector
Figure 4-1
C. Turn on the power of the PC.
D. Turn on the power of the radio.
E. Click on KSP8000 to perform the program and run KSP8000.
F. In the main menu of KSP8000, click on [Read] to read the parameters
of the radio into the PC; click on [Write] to write the parameters set in the
PC into the radio.
G. With the KSP8000 Programming Software, you can set the following
parameters according to the requirements of customers:
The station information:
Model of vehicle station (model/ frequency range), serial number, embedded information, MCU version and hardware version, etc
The station parameters:
(1) Programmable buttons: P1, P2, P3, and can be set to long/short
button and the long button time can be defined
(2) Miscellaneous settings
. Cable copy mode allowed
. TOT transmitting time limitation
. TOT transmitting time limitation reset
7
PT8000 SERVICE MANUAL
. Pre-tips for TOT transmitting time limitation
. Re-key time of TOT transmitting overtime
. Squelch level option
. Warning tone
. Frequency reading code
. Frequency writing code
(3) Scanning settings
Scanning option, priority channel selection, back-channel selection, transmitting pause time, scanning detention time and fly-back period
(4) Emergency alarm settings
Channel parameters:
(1) Channel receiving frequency and transmitting frequency. (stepping frequency: 2.5KHz / 5KHz / 6.25KHz
(2) Channel receiving signaling and transmitting signaling
none
sub-audio frequency CTCSS (60~260Hz @ 0.1Hz step)
CTCSS digital DCS(-777 ~ 777 @ octal umber)
(3) Busy channel lock option
(4) Clock beat frequency shift selection
(5) Channel spacing selection 25KHz/12.5KHz(Wide/Narrow)
(6) Scanning adding/deletion selection
(7) Channel high/low power selection
(8) CTCSS rhyme flip & phase shift selection
(9) Code selection of CALL1 and CALL2
(10) Code selection of PTT ID on-line code and off-line code
DTMF setting:
DTMF encoding template
DTMF encoding sequence (group 1~12)
DTMF decoding sequence (group 1~4
Decoding response
Please refer to the Help document of KSP8000 for details.
Caution:
1. Before editing for the first time, the data should be read from the vehicle
station and properly backed up.
2. If the edited data cannot work normally after being written into the vehicle
station, please open the backup data and rewrite them.
3. Model Information is the important information of the vehicle station
and should not be altered.
Test Mode
According to Figure 4-1, connect the vehicle station and the serial port of
the computer with the special programming cable.
Warning: Before entering the Test Mode, please first connect a high-frequency load of 50 ohm to the antenna port of the vehicle station or connect the
vehicle station to a comprehensive tester.
With the KSP8000 Programming Software, you can enter the adjustment
status in Computer Test Mode to adjust the following parameters of the vehicle station:
1. Frequency stability
2. Transmitting five frequency points of high power
3. Transmitting five frequency points of low power
4. Level- 9 broadband of squelch level opens five frequency points
5. Level- 9 broadband of squelch level closes five frequency points
6. Level- 9 narrowband of squelch level opens five frequency points
7. Level- 9 narrowband of squelch level closes five frequency points
8. Level- 1 broadband of squelch level opens five frequency points
9. Level- 1 broadband of squelch level closes five frequency points
10.Level- 1 narrowband of squelch level opens five frequency points
11.Level- 1 narrowband of squelch level closes five frequency points
12.Five frequency points of broadband QT(67Hz) frequency offset
13.IF points of narrowband QT(67Hz) frequency offset
14.Five frequency points of broadband QT(151.4Hz) frequency offset
15.IF points of narrowband QT(151.4Hz) frequency offset
16.0Five frequency points of broadband QT (254.1Hz) frequency offset
8
IF points of narrowband QT(254.1Hz) frequency offset
Five frequency points of broadband DQT frequency offset
IF points of narrowband DQT frequency offset
Receiving five frequency points of sensitivity tuning voltage
IF points of broadband/narrowband DTMF frequency offset
Firmware Programming Mode
The vehicle station is equipped with FLASH ROM internally, when new
features are announced, it can be upgraded.
1. Press P3 for over 2 seconds and connect the power at the same time.
Enter Firmware Programming Mode when orange indicator is on.
2. Run computer programming software KMU.
3. Connect the vehicle station and the computer with the programming cable.
4. Select the com port to load firmware upgrade file and then click on E.P
for downloading.
5. Turn off the power to quit after the communication is successful.
6. Just repeat steps 1-5 if you want to program another vehicle station.
Cable Copy Mode
The vehicle station will not exit automatically after entering cable copy mode
if the cable copy function is set. But the user need to turn on the power again
if return the user mode.
The operation steps are as follows:
Main machine
Cable copy line KCL02
Sub machine
Figure 4-2
1. Press [P1] and connect the power at the same time for entering copy
mode when it C appears. Please enter user mode if copy mode is
prohibited.
2. Connect sub-machine with cable copy line (KCL02) and turn on the power
of sub-machine.
3 .Press [P2] of Host for copy with the red indicator on, thus the data can be
copied from Host to sub-machine. The sub-machine shows P with green
indicator on when receiving the data. The red indicator of Host is off after
copy, while sub-machine reset automatically after receiving all data.
4. You may continue the copy of step 3.
Notes: You may turn on or prohibit cable copy mode by PC Programming
Software. The vehicle station can not enter cable copy mode once the cable
copy function is prohibited.
Chapter 5 Maintenance, Assembly and Disassembly
The station is a kind of sophisticated communication equipment with small
and fine mechanical structure. You should assemble and disassemble it
carefully during the maintenance process. The Instruction for assembly and
disassembly are as follows:
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