Chapter 7 Major Specifications; Chapter 8 Trouble Shooting - Kirisun PT4200 Service Manual

Item Test Test
Condition Equipment
CTCSS CTCSS:
Frequenc
DEV 67Hz y
Deviation
Meter/
Compreh
ensive
DCS
DCS
Test
DEV
023N
Device
Battery
Battery
Power
Terminal:
Warnin
6.8V
g

Chapter 7 Major Specifications

7.1 General Specification
Model PT4200
Frequency (1)420~470MHz (2)400~450MHz
Modulation 11K F3E
Number of Channels 16(15+S)
Channel Spacing 12.5 kHz
MF 1st MF 49.95 MHz 2nd MF 450kHz
Working Voltage 7.5V
Working Temperature -25 ~ +55
Antenna Impetance 50
Mic Impedance 2k
Battery (Standard) Model KB-58A Li-Ion Battery DC 7.2V ,
Dimension (WXHXD) 56 mmx120 mmx29 mm
Weight 235 With battery and Antenna
7.2 Receiver
Available Sensitivity
(12dBSINAD)
Squelch Activation
Sensitivity
Receiver Surplus
Output
Modulation Receiving
Bandwidth
Adjacent Channel
Selectivity
Intermediation
Reject Ratio
Spurious Response
Reject Ratio
Audio Output
500mW
Power
Receiving Current
Sinking
Standby Current
(Average)
13
Test Adjustment Require
-ment
Point Part
Adjust
Computer
Anten
±
to 0.75kHz
Test Mode
na
Adjust
±
to 0.35kHz
After
adjustment,
the indicator
flashes.
1000mAh
0.35 V
0.20 V @level 3 squelch
-40dB
3.5kHz
60dB
60dB
70dB
@distortion 5% 4
250mA
25mA
Note
RF Power
Frequency Stability
Maximum Modulation
± 50Hz
Frequency Deviation
Modulation Sensitivity
Modulation
± 50Hz
300~3000Hz
Adjacent Channel
RF Power
Spurious and
Harmonics
Residential Frequency
Modulation
Transmitting Current
Sinking
No
. PROBLEM
No
display
after
1
switching
on the
radio.
PLL is
unlocked.
(Beep
2
sounds)
Cannot
talk to or
hear
3
other
group
members.
Cannot
receive
signals.
4
PT4200 SERVICE MANUAL
4.0W @7.5V DC
-6
2.5x10
2.5kHz
16mV
3%
-60dB
-70 dB
-40 dB
1.8A @ 7.5V DC

Chapter 8 Trouble Shooting

SOLUTION
A. Battery power may be insufficient. Recharge or
change the battery pack.
B. The power switch is broken, and please change it.
C. The CPU is broken, and please change it.
D.The regulator IC12 is broken, and please change
it.
A. The PLL crystal oscillator C4 is broken, and please
change it.
B. The oscillatingtube is broken, and please change it.
C. The oscillatingtube is broken, and please change it.
A. Make sure the two communication radios are
using the channel of the same frequency.
B. Make sure the CTCSS/DCS tone is the same as
that of your group members.
C. Out of the effective communication range.
A. The antenna is not well connected, and please
screw the antenna again until secure.
B. The sensitivity is too low and minitrim L9, L10, L7,
L6, and L5.
C.HF amplifier Q20 is broken, and please change it.
D. The squelch level is too high and the squelch
cannot be activated. Reset the squelch level with a
computer.
E. Mixer tube Q19 is broken, and please change it.
F. MF processing chip IC5 is broken, and please
change it.