Kirisun PT8000 User manual

SERVICE MANUAL
VHF/UHF MOBILE RADIO
V071215
PT8000

1
CONTENTS
PT8000 SERVICE MANUAL
DANGEROUS!!
WARNING!
STATEMENT!
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.
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.
It's better to avoid putting it in rain or snow, or any other
liquid to ensure its life and performance.
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 , , .
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 Technical 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 Top 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 Top Keyboard Position Mark Diagram..................26
Figure 7 PT8000 Bottom Keyboard Position Mark Diagram............27

2
PT8000 SERVICE MANUAL
Chapter 1 Introduction
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
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
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:
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
Compo
Radio
M o
del/ Mate ria l Serial
Qua
No. No.
pecifications
nent Sntity
Model
1.3 Service
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.
Installation Condition
1.Unpack
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.
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. Signllingoperation should beverified.
4. Installation Steps
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.
4.2Antenna
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
1
1
1
1
4
2
4
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
1
Quantity
Fixed bracket
Power Cable
Hand Microphone
Microphone Hanger
M4*10 Combination
Screw M5*16 / M4*16
Self-tapping Screw
negative terminal.
PT-8000 2
PT-8000 2 ChipFET
Triode
Chip
Q3
Q49 RD01MUS1
2SC5108 Y 105-RD01MU-R01
104-SC5108-R01 1 1
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.

3
PT8000 SERVICE MANUAL
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
convenientfor operation and control, andleave anenough spacefor 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 toadjust theradio tothe properheight andvisual
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.
Chapter 2 Radio Overview
2.1 Description of External View
P1 P2 P3
8
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
Display
SCAN indicator
LOW indicator
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 whenthe radiois in the remote stunstatus.
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
8.
2.3 Rear Panel
AntennaInterface
Power Interface
External Speaker Interface
Chapter 3 Circuit Principles
1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number Revisi onSiz e
A4
Date: 2008-9-1 Sheet of
Fil e: X:\PT8000\ ..\ Frequency confi guration. SchDocDrawn By:
ANT
ANT SW RF AMP MCF
49.95MHz IF SYSTEM
CF1
450KHzH
CF2
450KHzF
X3 multi ply
AF AMP
TCXO
16.8MHz
MIC AMPPLL VCOTX AMPPA AMP RX
TX
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

UL
CK
DT
UL
PLL IC
IC3
QT TCXO
5V
LOOP FILTER
RIPPLE
FILTER
VCO
Q6
BUFF
Q1 Q2
RF AMP VCO OUT
5V Q14
2ND LOCAL
MB15E03SL MOD
16.8MHz
X1
TCXO
3.5V
TX
VCO
Q14
RX
8R
Q11
*3 2ND LOCAL AMP
Q7
BUFF
5V
4
SPEAKER
IC6
Q33
SW
AF POWER AMP
IC7
AF OUT
MUTE
TDA1519C
IC8A IC8BIC8CIC8D
AMP LP LP AMP CTCSS/DCS
MIC
IC9C IC9BIC9AIC9D
AMP HP LP LP HP
Q26 8R
IC10BIC10A
HP AMP 2T
IC5
DTMF
DECODER
D0
D1
D2
D3
DV
J1 SPK
IC13D IC13AIC13BIC13C
LP LP IDC AMP
MOD
VR1
10K
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 bythe firstIF amplifier (Q20)
before processing of IC in IF( IC6 TA31136).
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 Q11 and peripheral circuit and
then generatethe second localoscillator (50.4MHz).The secondIF signals
(450kHz) are generated after signals mixing of the second local oscillation
(50.4MHz)and thefirst IF (49.95MHz)inIC6. Audiosignals aredemodulated
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
VCO RFAMP
8T 8R
Q4 Q5
DRIVE
PRE
8T 8T
ANTSW LPF
APC CONTROL
IC4
TX/RX SW
TOANT
IC1
RA30H
APC
8T
13.8V
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
transmittercan be controlled conveniently bychanging thegate biasvoltage.
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
Figure 3.3 Schematic Diagram
for Power Amplifier and Antenna Switch
voltage of IC1 will decrease, finally the output power of transmitter will
decreaseor vice versa. Thus, theoutput powerof transmitterwill keepstable
under any different working condition.
MCU can set the power by changing the voltage input to IC4.
3.4 Principles of Frequency Synthesizer
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)
isdivided by PPFD in IC3to producereference frequencyof 5kHzor6.25kHz
(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 thenMCU prohibittransmitter fromtransmitting with a
warning tone.
3.5 Audio Processing Circuit:
Figure 3.5 Schematic Diagram for Audio Processing Circuit
MIC Signal Processing:
Voice signals from MIC are amplified in IC13A (IC13Acomposes the AGC
circuit with D32 and Q32 to increase the dynamic range of the circuit), and
thensent to IDC circuit composedby IC13Bafter thepre-emphasis ofC322
and R267. The limited signals are switched broad/narrowband in Q30 and
thenfiltered signals over 3000Hz inthe two-levellow passcircuit composed
byIC13C andD.Thenthe filteredsignals are modulatedto transmittingVCO
by D8 after frequency offset adjustment in VR2.

023
025
026
031
032
043
047
051
054
065
071
072
073
074
114
115
116
125
131
132
134
143
152
155
156
162
165
172
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
445
464
465
466
503
506
516
532
546
565
606
612
624
627
631
632
654
662
664
703
712
723
731
732
734
743
754
N
1
2
3
4
5
6
7
8
9
O. Port name
IGN
EXT-ALARM
MODE
SCL
SDA
RST
XOUT
VSS
XIN
Pin Name
P33
P34
P43
P44
I/O
I
I
I
O
I/O
I
O
-
I
Function
PT8000 SERVICE MANUAL
Receiving Audio Signal Processing:
Audiosignalsfrom IC6are classifiedinto twogroups. Onegroupis amplified
and filtered in low pass circuit composed by IC8 (for audio signal), then the
relativelypurified CTCSS/DCSsignals are sentto MCUfor processing;the
other group is amplified by IC9C in IC9 (Q29 is gains switch circuit used for
the volume switch of broad/narrowband), after that, one group is shaped to
bettersquare signal in two-tone shapingcircuit composedby 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
ControlPLL for the generation, receivingand transmittingof localoscillation
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/DCS signal coding and decoding:
CTCSS/DCS signalsfrom MCU(pin12 output, PWMwave) aresent toVCO
and TCXO for modulation after the balance adjustment by VR1.
CTCSS/DCSsignals fromreceiver are sentto MCUfor decoding,andthen
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 system with modulation on carrier
and continuous sub-audio signals as pilot tone. If CTCSS function is set,
the call is available only at the same CTCSS frequency of both receiving
and transmitting parties to avoid the disturbance of other signals.
Thestation has39 groupsof standard CTCSS frequency foryour selection,
such as Table1.
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
No.
1
2
3
4
5
6
7
8
9
10
Frequency
[Hz]
67.0
69.3
71.9
74.4
77.0
79.7
82.5
85.4
88.5
91.5
No.
11
12
13
14
15
16
17
18
19
20
Frequency
[Hz]
94.8
97.4
100.0
103.5
107.2
110.9
114.8
118.8
123.0
127.3
No.
21
22
23
24
25
26
27
28
29
30
Frequency
[Hz]
131.8
136.5
141.3
146.2
151.4
156.7
162.2
167.9
173.8
179.9
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
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 compon-
ents over 300Hz in low pass filter composed by RC.
CTCSS/DCS signals from receiver are sent to MCU for decoding, andthen
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
3.8 Description of Semiconductor Devices
MCU Description
Table 3.3 Port Description of Microprocessor (R5F212A8)
Reserved
ExternalAlarmInput
Connect resistor of 4.7K with VCC
EEPROM Clock Line
EEPROM Data Line
Reset Input
Oscillator
Grounding
Oscillator 7.3MHz
5

6
PT8000 SERVICE MANUAL
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
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
-
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
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-powerIndicator 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 PowerControl
H: on
Receiving Power Control
H: on
TX: Automatic Power Control
Output
RX: BPF Tuning Output
MainPower SwitchControl H: on
Transmitting GateControl
L:Transmitting
PA Control H: PA
Mute Control L:AF Mute
Mute Control H:Mic Mute
AudioPowerAmplification Control
L: Power Amplification
QT/DQT Signal Input
Signal Strength Input
Busy Signal Input
PowerAmplificationTemperature
Protection Input
Keyboard Entry
Keyboard Entry
Press [PTT] to input, Connect
R0 ohm with TXD
N Port name Pin Name I/O Function N Port name Pin Name I/O Function
O. O.
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
CLK
INT
TXD
RXD
BLC
8TC
8RC
APC/TV
SBC
TXGSW
PA
AF_MUTE
MIC_MUTE
AFCO
TI
RSSI
BUSY
TEMP
KEY2
KEY1
PTT
P60
P45
P66
P67
P65
P64
P63
P31
P30
P36
P32
P13
P12
P11
P10
P00
P01
P02
P03
P04
P62
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
56
57
58
59
60
61
62
63
64
NC
NC
VCCN
AVSS
DTMF
VREF
AVCC
MAXAF
WNTC
P06
P07
P37
P35
O(D/A0)
-
O(D/A1)
-
-
O
O
Connect Pull-down Resistor
with VSS
Connect Pull-down Resistor
with VSS
Frequency Voltage Regulation
Output VCCN
Connect with VSS
D/AOutput: DTMF/BEEPOutput
Connect with AVCC
CPU Power 5V Input
AlarmMax VolumeControl Switch
H: Controlled by Volume Switch
L:Max Volumeat Emergency Alarm
Broad/narrowband Control
H: Broad L: Narrow
3.4 Functional description of semiconductor device
Item Model FunctionDescription
IC5
IC12
IC13
IC3
IC4
IC6
IC9
IC8
IC11
IC15
IC7
IC11
IC17
IC16
Q9
Q12
Q14
Q11
Q16
Q18
Q19
Q1
Q20
Q21
Q22
HT9172
PST9140NR
NJM2902V
MB15E03SL
NJM2904
TA31136
NJM2902
NJM2902
R5F212A8
AT24C08
TDA1519C
RA30H
NJM78L05
TA7808S
DTC144EE
2SK508NV
2SC4617
2SC5108
2SK1829
3SK318
3SK318
2SC5108
2SC5108
2SC4617
DTC144EE
Q23
Q29
Q30
Q27
Q33
Q45
Q28
Q35
Q40
Q1
Q38
Q32
Q4
Q5
Q46
DTA144EE
DTA144EE
2SK1824
DTC144EE
2SK1824
2SK1824
DTC144EE
DTA144EE
KTA1298
2SC5108
KTA1298
2SC4919
2SC3357
2SC3357
2SK1824
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,
FunctionSetting 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

7
PT8000 SERVICE MANUAL
Q6
Q3
Q7
Q13
2SK508NV
2SC4116
2SC5108
2SC4116
Emergency
Transmitting VCO Oscillation Circuit
Transmitting VCO Control Switch
VCO Buffer Amplifier
Receiving VCO Control Switch
Item Model FunctionDescription
Table 3.5 Functional description of Diode
Item Model FunctionDescription
D3 D11
D12
D14 D16
D17 D18
D16
D17
D18
D7
D2 D19
D20 D21
D8
D23
D25
D27 D28
D26 D30
D29
D32
D1 D4
D5 D6
D8
L709CE
MA2S111
HVC376
HVC376
HVC376
HVC376
HZU5ALL
HSC277
DAN222
HVC376
HVC355B
MA742
HVC376B
1SS372
HVC376
1SV278
Transmitter antenna switch diode
Lock Lost Detection Diode
Receiving VCO Oscillation Varactor Diode
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
TransmittingVCOOscillation Varactor Diode
Receiving BPF Varactor Diode
Noise Demodulation
Receiving BPF Varactor Diode
MIC AGC Detection Diode
TransmittingVCOOscillation Varactor Diode
Transmitting VCO Modulation Diode
Table 3.6 Characteristic of XF1 crystal filter
Item Rated Value
Item Rated Value
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
Table 3.7 Performance and characteristic of CF1 LTWC450H
Nominal center frequency
6db band width
50db band width
Ripple
Insertion loss
Ensure attenuation
Terminal impedance
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
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
Table 3.8 Performance and characteristic of CF1 LTWC450F
Chapter 4 Mode Introduction
Mode combinations
Mode Function Howto access
User Mode Fornormal use Poweron
Data
Programming
mode
TestMode
Wired Clone
mode
PC
Mode
Reading and writing
frequency data and
other functions
Receive instructions
from the PC
Receive instructions
from the PC
Firmware
Programming
Mode
Press button P3 for over
2 seconds and connect
the power at the same
time;Receiveinstructions
from the computer
Used to tune the radio
using the PC.
Upgrades the software
when new features are
added
Used to transfer progra-
mming data from one
radio to another.
Press button P1 for over
2 seconds and connect
the power at the same
time.
User Mode
You can enter User Mode (conventional communication mode) by turning
on the power switch. Users in the mode can use the defined 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
workingfrequency, channels,CTCSS/DCS and autoscanning, etc.Should
be reset. Therefore, the company has specially designed a setof Chinese
/English programming software KSP8000 with friendly interface, conven-
ient operation and visualized display for setting functional parameters of
the radio.
Stepsfor settingthe functional parametersof theradio byPC are asfollows:
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
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 setin 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, embed-
ded information, MCU version and hardware version, etc
The station parameters:
(1) Programmable buttons: P1, P2, P3, and can beset tolong/short
button and the long button time can be defined
(2) Miscellaneous settings
. Cable copymode allowed
. TOTtransmitting time limitation
. TOTtransmitting time limitationreset
DB9 female plug
to an RS-232c port
Pesonal
computer
to the MIC connector
to the antenna
connector
to DC cable
DC power supply
13.8V/7A
Figure 4-1

8
PT8000 SERVICE MANUAL
. Pre-tips for TOT transmitting time limitation
. Re-key time of TOT transmitting overtime
. Squelch leveloption
. Warningtone
. Frequency readingcode
. Frequency writingcode
(3) Scanning settings
Scanning option, priority channel selection, back-channel selection, trans-
mitting pause time, scanning detention time and fly-back period
(4) Emergency alarm settings
Channel parameters:
(1) Channel receiving frequency and transmitting frequency. (stepping fre-
quency: 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 editeddatacannot work normallyafter beingwritten intothe 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 theserial port of
the computer with the special programming cable.
Warning: Before entering the Test Mode, please first connect a high-frequ-
ency 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 adjustthe following parameters of the ve-
hicle 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
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 thevehicle station andthe computerwith theprogramming cable.
4.Select thecom port toload firmwareupgrade fileand thenclick 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
Thevehiclestation will notexit automaticallyafter enteringcable copymode
ifthe cablecopy function isset. Butthe userneed toturn onthe poweragain
if return the user mode.
The operation steps are as follows:
Main machine Sub machine
Cable copy line KCL02
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 copyline (KCL02)and turnon thepower
of sub-machine.
3 .Press [P2] of Host for copy with the red indicator on, thus thedata canbe
copiedfrom Hostto sub-machine. Thesub-machine shows P with green
indicator on when receiving the data.The redindicator 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 vehiclestationcan notenter cable copy mode oncethe 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 duringthe maintenanceprocess. The Instruction forassembly and
disassembly are as follows:

9
PT8000 SERVICE MANUAL
1.Exploded view of the station
Figure 5-1
QTY. QTY.
ITEM ITEM PARTNUMBER PARTNUMBER
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
201-008000-R02
203-006800-R26
203-007200-R08
204-006800-R01
301-25050J-R01
201-008000-R01
204-008000-R01
121-100000-R19
120-400000-R04
120-400000-R05
204-008000-R02
204-008000-R03
203-008000-R02
120-100000-R15
201-008000-R06
203-008000-R03
202-008200-R02
303-30100G-R01
203-008200-R03
102-304452-R01
203-008200-R05
203-008200-R09
301-30060G-R01
1
1
1
1
1
6
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
8
26
27
28
29
30
31
32
33
204-008000-R04
203-008000-R01
301-30250D-R01
201-008000-R04
201-008000-R03
202-008000-R01
302-26060D-R01
2
1
6
1
1
1
1
5
DESCRIPTION
KNOB VOLUME
SPRING PLATE
NUT VOLUME KNOB
LABEL LCDLENS
LABEL LOGO
SCREW M2.5*5
CASE FRONT
NET DUSTPROOF SPEAKER
SPEAKER
LINE SPEAKER
LINE 0.5*34P*110mm
STRIP DUSTPROOF C
PLUG RUBBER SPEAKERHOLE
SCREW M3*10 WITHSPRING PLATE
STRIP DUSTPROOF B
CASE TOPAL
CABLE POWER
FASTENER POWERCABLE
PLATE METAL
ANTENNA BASE
MODULE POWER
SHIELD POWER MOUDLE
CUSHION SHIELD
PCB ASSEMBIY MAIN
SCREW M3*6
DESCRIPTION
KEY RUBBER
LENS LCD WINDOW
LENS LED
CASE BOTTOMAL
SCREW M3*25
STRIP DUSTPROOFA
SCREW M2.6*6
PCB ASSEMBLYCONTROL