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FP460
Service Manual
53 pgs1.65 Mb0
User Manual
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Kirisun FP460 Service Manual

Content
Chapter 1 Overview......................................................................................................... 1
Chapter 2 External View and Functional Keys ............................................................. 3
Chapter3 Circuit Description.......................................................................................... 7
Chapter 4 Function Description and Parameter Settings.......................................... 17
Chapter 5 Disassembly for Repair............................................................................... 25
Chapter 6 Adjustment................................................................................................... 32
Chapter7 Major Specification....................................................................................... 33
Chapter 9 Troubleshooting .......................................................................................... 35
Appendix1 Abbreviation............................................................................................... 36
Appendix 2 Electronic Parts List................................................................................. 37
Chapter 1 Overview
1.1 Introduction
This manual applies to the service and maintenance of FP460 FM portable radios, and
is intended for use by engineers and professional technicians that have been trained by
Kirisun. It contains all the required service information for the equipment. Kirisun reserves
the right to modify the product structure and specifications without notice in order to
enhance product performance and quality. You can also contact your local dealer or us to
get the latest service manual.
Please read this manual before repairing the product.
1.2 Safety Precautions * Electromagnetic Energy Exposure
Radios will generate and radiate electromagnetic energy during transmit mode.
Kirisun radio is designed to comply with a number of national and international
standards for human exposure to radio frequency electromagnetic energy.
In order to obtain best performance, and to guarantee that the electromagnetic
radiation does no harm to you, always keep the radio in a vertical position to the ground
FP460 Service Manual
and make sure that the microphone is 2-5cm from your mouth while using.
* Electromagnetic Interference
In order to avoid electromagnetic interference, please turn off the radio in the place
where such post prompts you to do so, e.g. hospital, health care center, airport and etc.
* Explosive Atmosphere
It’s prohibited to use the radio in the following places:
Any area with a potentially explosive atmosphere, e.g. orlop deck of the ship, storage
and transportation equipment for fuel and chemical, where the air with chemical
substance, particle or iron dust.
Any place near blasting sites or area with electrical blasting cap.
It is also prohibited to change or charge the battery in any area with a potentially
explosive atmosphere.
* Antenna
If the antenna has been damaged, do not use the radio. Damaged antenna may cause
light burning to skin.
* Replacement Parts
All components used for repair should be supplied by Kirisun.
Components of the same type available on the market are not surely able to be used in
this product and we do not guarantee the quality of the product using such components.
1.3 Service
All the Kirisun products are subject to the service warranty.
The warranty of the host is 18 months. The warranty of the accessories, including
battery, charger, earphone, antenna and adapter, is 6 months. However, in one of the
following cases, charge free service will not be available.
* No valid warranty card or original invoice.
* Malfunction caused by disassembling, repairing or reconstructing the radio by users
without permission.
* Wear and tear or any man-made damage such as mechanical damage, burning or
water leaking.
* Product’s serial number has been damaged or the product trademark is difficult to
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FP460 Service Manual
identify.
After the warranty expires, lifetime service is still available. We also provide service
components to service stations and staffs.
Chapter 2 External View and Functional Keys
2.1 External View and Functional Keys
Figure 2.1
1.Antenna
2. PTT
Press the key and talk to make a call; release the key to listen
3.PF Button
The button can be assigned different functions through PC software by your dealer.
Details refer to the following “Programmable Key” in this service manual.
4. Speaker
Output the voice
5. LCD Display Screen
Display and indicate the operation status. Details refer to the following “LCD Display
Screen” in this instruction.
6.Up Key
7. Menu Key
In standby status, press the key to enter the menu. In menu operation, press the key to
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FP460 Service Manual
confirm the selected item.
8. Confirmation Key
9. Down Key
10. Digital Keypad
There are 12 keys. You can use them to enter the numbers you want to dial, edit the
message or edit the contact.
11. Channel Knob
Rotate to choose 1—16 channels.
12. On/Off Key and Volume Knob
Clockwise rotate the knob to turn on the radio, and counterwise rotate the knob until
there is a click sound to turn off the radio.
Rotate the knob to adjust the volume when the radio is on.
13. LED Indicator
When transmitting signal it indicates red, when receiving signal it indicates green. It
flashes when the power is not enough.
14. Microphone
Input the voice
15. Cancel Key
In menu operation, press the key to cancel the operation or return back to the previous
menu.
16. External Connector
Open the cover to connect external speaker and microphone.
17. Belt Clip
Pushing Buckle
2.2 Functional Keys Operation Instruction Programmable Keys
Below keys can be set through PC software by dealers:
Long press key and short press key can be set: PFkey
Long press key can be set：Menu Key/ Cancel Key
NOTE：
Short press：Press down and release instantly.
Long press：Press down and keep 2 minutes to release.
Available functions to be chosen:
None：No feature will be assigned.
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FP460 Service Manual
Home screen: Returns to the Home Screen in menu status.
Power level adjustment: Switch between high/low power
Call log: Enter into call log menu.
Monitor: If the current analog channel is with CTCSS/CDCSS, press the key to squelch
mode to cancel the CTCSS/CDCSS function. Press the key again to return to the original
status.
Emergency alarm open: Start the Emergency Alarm function to seek help.
Emergency alarm close: Exit the Emergency Alarm function.
Keypad Lock: To switch between lock and unlock status. When the keypad is locked,
only PTT/ Emergency Alarm shortcut key and channel knob are available for use.
Squelch open/close: Open/close the squelch function to receive weak signal on analog
channels.
Squelch level adjustment: To adjust the signal strength.
Contact list: To enter into the contact list interface to choose the number.
Scan: Check activity of other channels. Press the key to open/close this function.
Temporarily delete unwanted channel: Temporarily delete unwanted channel while
scanning.
Kill: To make other radio unusable.
Unkill: To make the killed radio resume working.
Whisper: When the whisper function is on, others can hear clearly even speaking in a
low voice.
Battery level indication: To indicate the left power.
Zone up: Switch to the previous zone.
Zone down: Switch to the next zone.
2.3 LCD Display Screen
No signal Signal Strength
Indication
Signal detected.
There is unread message in the inbox.
Message
The inbox is full.
Scan The radio is in scanning status.
The transmission power of the current
Power
channel is low.
The transmission power of the current
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FP460 Service Manual
channel is high.
Keypad Lock Indicate that the Keypad is locked.
Display when pressing the Squelch on/off
Squelch off
shortcut key.
The radio is in emergency alarm status
Emergency Alarm
Battery Display Indicate the residual capacity of the battery
Private Call
Group Call
All Call Indicate the current number is all call number
Call Out Indicate that the radio is transmitting signal.
Call In Indicate that the radio is receiving signal.
Hold on the call
(except secret alarm), or receives emergency
alarm.
Indicate the current number is private call
number
Indicate the current number is group call
number
Indicate that the call is holding on, without the
need to redial.
2.4LED Indicator
Red LED lights on: the radio is transmitting.
Green LED lights on: the radio is receiving.
Red LED flashes: low battery, the battery needs to be charged.
2.5 Basic Operation Turn On/Off the radio
Clockwise rotate the knob to turn on the radio, and counter wise rotate the knob until
there is a click sound to turn off the radio.
Selecting a channel
Each channel in your radio can be programmed to analog channel or digital channel.
Under the Home Screen, turn the Channel Knob to select a channel.
Adjust the volume
Rotate the knob to adjust the volume when the radio is on.
Make a call
On a digital channel, choose one of the following procedures to make a call:
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FP460 Service Manual
Q
a. Enter Contacts menu, select one contact and then press and hold the PTT Button,
speak to the MIC.
b. Enter Call Log menu, and then enter Call Out or Call In item, select one contact,
press the PTT Button and speak to the MIC.
c. Under the Home Screen, press the PTT Button and speak to the MIC. The call out
number is the default contact number of this channel, which can be programmed by the
dealer, or set through menu.
d. Under the Home Screen, input the number manually, then press the PTT Button and
speak to the MIC.
On an analog channel, press the PTT Button and speak to the MIC.
Receiving a call
When receiving the signal, the signal strength will be indicated on LCD. While on
digital channels, when receiving private call/group call/all call, the radio will output the
voice. While on the analog channels, when receiving analog signal and the
CTCSS/CDCSS matches, the radio will output the voice.
Answering a call
While using digital channels, press PTT within call holding time after receiving the call
to answer the call. If you didn’t answer back during call holding time, you should start a
new call to call back. The call holding time can be set through PC software by dealers.
While using analog channels, press PTT to answer the call directly.
Chapter3 Circuit Description
3.1 Preface
This radio is FM portable radio equipment.
3.2 Frequency Configuration
LPF
APC
ANT SW
500
Q501
12.8M
LNA
RDA1846S
Q503
FLASH
AF AMP
32.768KHz
LT1801A
18.432MHz
MIC
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FP460 Service Manual
The reference frequency of RD1846S is generated by 12.8MHz crystal oscillator X500
TCXO.
3.3 Principle of Receiver (RX)
LPF ANT
SW
LNA
RDA1846
LT1801A
POWER
SW
AFAMP
Figure 3.3 Principle of Receiver
Receiver is mainly used in receiving, selecting, amplifying, transforming, demodulating
etc. and other processing like audio signal amplifying, filtering. Audio part mainly is used
to post emphasis, amplify and filter audio signal.
Receiver Front End
Low noise amplifier is located in the receiver front-end, mainly used in amplifying small
radio frequency signal, in order to provide certain intensity and SNR of RF signal for
subsequent signal processing.
Signals from the antenna transmission (RX/TX) switch (D502 D501, D503, D504), are
sent to Q507 3SK318 and peripheral components consisting of low noise amplifier (LNA)
for enlarging. The enlarged signal will be sent into IC4 (RDA1846S) to demodulate into
output audio signal. 3sk318 noise coefficient is 1.4 db, G about 18 db.
There is input and output match for LNA. Input match adopts best noise figure while
output use maximum power to match, i.e., the amplifier output impedance adjusted to the
load impedance (typically 50 ohm); Input and output impedance of the low noise pipe is
usually high impedance, so the matching circuit using inverted L
Receiver audio signal processing
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FP460 Service Manual
Audio signal from IC4 (RDA1846S) processed through LT1801, then through the
volume potentiometer, to the audio power amplifier U600 (TDA2822).
Audio power amplifier
U600 and peripheral components makes up the audio power amplifier circuit
Q601 base is the control end. High level: U2 begins to make audio; Low level: closed.
Receive audio signals, voice signals, alarm sound signals are summarized and sent to
speaker through audio power amplifier. Among them, the alarm sound will not be limited
by volume control. The speaker impedance: 16 ohms.
3.4 Principle of Transmitter (TX)
12.8MH
LPF
ANT
APC
Q501 Q500
Q503
Q502
RDA184
6S
Power amplifier and antenna switch principle diagram
Modulated signal from IC4 (RDA1846S), enlarged via Q502, Q503, Q501, are sent to
Q500 power amplifier, and then transmitted through receiving toggle sending into the low
pass filter. LPF will improve as much as possible to harmonic stray signal attenuation in
certain condition of fluctuations in performance. Q500 output power: 4W
Q502 2sc5108 pre-amplifier, mainly to preliminary enlarge output RF signal of
RDA1846S, to provide a certain intensity of the amplifier after excitation signal.
Q503 2sc3356 pre-push RF amplifier is mainly used to provide a certain level of
intensity of excitation signal for subsequent amplifier, so as to guarantee the driving
amplifier can output enough power, to push the last stage power amplifier.
Q501 RD01 promote RF amplifier, is mainly used to promote the last stage power
amplifier, to ensure the output power of the last stage power amplifier to achieve the rated
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FP460 Service Manual
output power of the transmitter. The output is about 0.5 W, G about 14 db.
Q500 RD07, end RF power amplifier, is part of the important and critical level. The
output power and efficiency level at the end power amplifier are almost equal to
transmitter output power and efficiency. The stability of the last stage amplifier basically
represents the stability of the transmitter also. Output is 0.8W, G about 12db.
Q500 Q501 grid bias is controlled by APC circuit. Change the gate bias voltage, can
easily control the size of the transmitter output power.
APC (automatic power control) circuit
This circuit changes the gate bias voltage by testing the change of the input to the
power amplifier drain current and changes the output power by changing the gain.
R520 R521, R522 are power amplifier current detection, U502A is the current sampling
amplifier power amplifier. U502B is the comparison power amplifier.
If the transmitter output power is too large, the power amplifier current increase,
U502A output rise, U502B output voltage drops, applied to Q500, Q501 bias voltage to
drop, lower the transmitter output power, vice versa. In this way, the transmitter output
power is stable under different working conditions.
MCU achieves the goal of setting power by changing the input to the voltage on the
U502B.
Transmitter speech signal processing
MIC signal is sent through the inside and outside MIC switch circuit into No. 11 feet of
IC4 (RDA1846S) to modulate the carrier.
3.5 Principle of power
IC10
0
5T
5R
IC102
3.3V
IC102
1.8V
5T:AF; BASEBAND, RF
5R:RF
3.3V:MCU;BASEBAND
;LCD
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1.8V:MCU;BASEBAND;LC
D
FP460 Service Manual
The machine uses 7.4 V batteries. Transmitter power amplifier circuit (Q500, Q501)
and receiver audio processing (U600) directly uses the battery. All the other circuits are
powered by constant 5 V power supply.
IC100: 5T switch, controlled by MCU.
5T: supply power for front-end transmitter
5 R: supply power for receiver RF amplifier, audio signal processing unit
etc.
IC102:3C switch controlled by MCU, Provide 3.3 V
3C: receive 3V electricity controlled by power save, supply power for
RDA1846S.
IC102: Provide VCC1.8V
3.6 IC characteristics
RDA1846S features:
3.6.1. Fully integrated CMOS RF front-end
3.6.2, High linearity and low noise amplifier and mixer
3.6.3. Low intermediate frequency receiving channel
Automatic DC offset calibration circuit
High performance analog/digital converter and digital/analog converter
Fully integrated receive filters
The digital AGC
The frequency modulation demodulation technology based on digital signal processing
technology
3.6.4 Direct frequency synthesis pathway
Direct frequency synthesis frequency modulation
Emission filter based on digital signal processing technology
FM digital gain adjustable
Digital voice activation emission control
3.6.5. High-performance decimal PLL frequency synthesizers
Complete piece RF VCO
The complete piece inside the loop filter
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FP460 Service Manual
Low phase noise
Extremely fast phase lock time
High frequency resolution, frequency is adjustable
The built-in crystal frequency error calibration circuit
3.6.6. Ultra low power sleep mode
3.6.7. Three line serial digital interface control
3.7 semiconductor devices
MCU instructions
Table 3.7 the microprocessor (LT1801A) port
Pin
NO
E11 IO SIRIN SECRET_IO(Reserved for Encryption
D11 IO SIROUT
M4 IO RXD1 RXD(Download program)
J4 IO TXD1 TXD(Download program) L4 IO RXD2 EFUNC1(function key)
K4 IO TXD2 EFUNC2(function key, monitor key) A16 IO SCLK0 GPS Enable Pin A15 IO SSN0 TX_LED(Transmitter indication) B11 IO SRX0 RX_LED(Receiver indication) A11 IO STX0 LAMP(keypad light)
N4 IO SIMCK PTT KEY(PTT)
R4 IO SIMIO
P4 IO SIMRST Soft boot detection ( use this if you have
A8 IO RFSO RFIF Three line SPI serial data output
E9 IO RFSN0 RFIF Modules chosen line of three SPI
C12 IO AON HEADSET_DET(headset detect) B15 IOU KB0 KB The keyboard scan input/output
B14 IOU KB1 B13 IOU KB2
I/O Port
Name
function
chip) POW_C（Soft switch on power control）
EXT_PTT（PTT for earpiece）
any other functions. Otherwise, please
use POW_ON
module
piece inside signal is 0
signals [0-7], includes alarm and two
function keys. It is highly recommended
to refer to the design the of hardware
keyboard circuit to make it easier for
compatibility
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FP460 Service Manual
B12 IOU KB3 C16 IOU KB4 C15 IOU KB5 C14 IOU KB6 C13 IOU KB7
T3 IO LCDCRD LCD_RD R3 IO LCDCRS LCD_RS
P3 IO LCDCWR LCD_WR M3 IO LCDCS0 LCD_CS N3 IO LCDCS1
K1 IO LCDC0 LCD_D0
L1 IO LCDC1 LCD_D1 M1 IO LCDC2 LCD_D2
A14 IO SCLK1
B16 IO SSN1 APC A13 IO SRX1 A12 IO STX1 RX_SW
A9 IO PWM0
E10 IO PWM1 LCD_BACK
E7 - GPO0
D7 GPO1
C7 GPO2
B7 GPO3
CPU please don't use these 4 pins
D9 IO RFSN1 C9 IO RFSN2 TX-SW B5 IO OSCEN SPEAKER_EN
B8
IO
RFSCLK P6 IO NC N1 IO LCDC3 LCD_D3 P1 IO LCDC4 LCD_D4 R1 IO LCDC5 LCD_D5 T1 IO LCDC6 LCD_D6 K2 IO LCDC7 LCD_D7 L2 IO LCDC8 LCD_D8 M2 IO LCDC9 LCD_D9 N2 IO LCDC10 LCD_D10 P2 IO LCDC11 LCD_D11 R2 IO LCDC12 LCD_D12 T2 IO LCDC13 LCD_D13
LCD_RST
SPEAKER_POP/AGC_PD（AGC enable chip）
MOTO_EN 或 LAMP(Keypad light)
P_UL（Indicate frequency lock state）
5T（TX power control） 5R（RX power control） 5C（Radio frequency (RF) public power control）
P_PS（PLL lock indicator）
RFIF (Three line SPI clock module )
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FP460 Service Manual
K3 IO LCDC14 LCD_D14 L3 IO LCDC15 LCD_D15
G3 AI VO or VOX
F3 AI battery voltage detection
E3 AI RSSI
D3 AI
AO RFIF
（AUXDA
F5
）
AO RFIF
（AUXDA
E5
）
D1 AI RX_I+ AFDET
AI
C1
RX_I-
B1 AI RX_Q+
AI
A1
RX_Q-
A2 IO TX_I+ MOD1
IO
B2
TX_I-
A4 IO TX_Q+ MOD2
IO
B4
TX_Q-
IO
G2
IO
H2
IO
H5
J2 IO SPEAKER Linear SPEAKER Linear output
Simulation of the
ADC module voltage
input range is 0 to 3 v
Simulation of DAC
module input voltage
range of 1.15-2.15 V
Simulation of DAC
module voltage input
range is 0 to 3 v
Simulation of the
ADC module for
single-ended input
voltage range 1 VPP,
difference of 2, pp
Simulation of the
ADC module for
single-ended input
voltage range 1 VPP,
difference of 2, pp
Simulation of DAC
module voltage
output range of
single-ended 1 VPP,
difference 2 VPP
Simulation of DAC
module voltage
output range of
single-ended 1 VPP,
difference 2 VPP
CODEC 16 Ohm 耳 机 headphones
negative output
CODEC 16 Ohm
headphones positive
output
CODEC The
microphone bias
voltage
BUSY
VCCN(TCXO reference voltage)
TV/PC
CODEC 16 Ohm Headphones differential
negative output
CODEC 16 Ohm Headphones difference
negative output
MIXBIAS
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FP460 Service Manual
output
AI MIC input
input
amplitude=96mv
when 24dB open;
input
amplitude=1.53V
E2
after closed
AI MIC input
input
amplitude=96mv
when 24dB open;
input
amplitude=1.53V
F2
after closed
L5
D10
RXD0 (for GPS)
C10 TXD0 (for GPS) B10 RTS0 (for GPS) A10 CTSO (for GPS) R5 K5 GPIO0_12 Hard boot detection L7 L8 L9 L10 -
MIC2(headphone MIC input)
MIC1(headphone MIC input)
RDA1846S port
AVDD 1 Power supply
SCLK 2 Clock input for serial control bus
SDIO 3 Data input/output for serial control bus
AVDD 4 Power supply
XTAL1 5 Oscillator pin 1
XTAL2 6 Oscillator pin 2,control interface select
MODE 7 When MODE = VL, I2C Interface is select; When MODE =
V
, SPI Interface is select
H
SENB 8 Latch enable (active low) input for serial control bus
AFOUT 9 Audio signal output to speaker
NC* 10 No connection
MIC_IN 11 MIC input
Cc 12 Compensation capacitor connection
AVDD 13
Power supply
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