Kirisun PT6800, Service Manual

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PT6800 Service Manual
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39 201-006500-R06 Anode Bracket 1
40 204-006200-R04 Sponge Cushion 1
41 120-400000-R13 Flat Cable 1
42 301-20020G-R01 Machine Screw M2.0*2.0 4
43 203-006500-R07 Grounded Sheet 2
44 102-6800CN-R01 LCD Display Module 1
45 203-006500-R03 Keypad Metal Dome 1
46 202-006500-R06 Numeric Keypad 1
47 202-000558-R09 Waterproof MIC Cover 1
48 204-006800-R06 MIC Washer 1
49 204-006500-R01 Dustproof Washer for LCD Lens 1
50 201-006500-R08 LCD Lens 1
Chapter 7 Adjustment
7.1 Adjustment Method
After changing components during the maintenance, it is
necessary to test the radio and adjust its technical parameters.
7.1.1 Components required during adjustment
1) Antenna connector converter
2) Universal connector
7.1.2 Manual tuning method
1) Five frequency points of the radio need to be adjusted.
The following table is the frequencies corresponding to the
numeric keys.
Radio Model Key 1 Key 2 Key 3 Key 4 Key 5
PT6800 (2) 350.05MHz 370.05MHz 389.95MHz 360.05MHz 380.05MHz
PT6800 (4) 400.05MHz 435.05MHz 469.95MHz 417.05MHz 452.05MHz
2) Panel tuning mode (Manual)
Press and hold “ ” key while turning the radio power ON
to enter the panel tuning mode.
Press “ ” key or “ ” key to select the item you want to
adjust.
Press “ ” key to save the adjusted parameters.
Press the “Redial Button” to switch between wideband and
narrowband.
Press key “7” to switch between “Emphasis” and
“De-emphasis”.
Press key “8” to enable or disable “Compander” function.
Press key “9” to enable or disable “Beat Shift” function.
Turn the rotary encoder to adjust the parameters of the radio.
Press key “1”, “2”, “3”, “4”, and “5” to choose the five
frequency points of the radio.
Items need to be adjusted and the tuning points under tuning
mode are listed in the following table:
Item Display Tuning Method Tuning Point Tx/Rx
Frequency FREQUENCY Rotary Encoder Center freq point Tx
High power HIGH POWER Rotary Encoder Five freq points Tx
Low power LOW POWER Rotary Encoder Five freq points Tx
DQT balance DQT BALANCE Rotary Encoder Five freq points Tx
Max deviation MAX DEV Rotary Encoder Five freq points Tx
QT deviation QT DEV Rotary Encoder Five freq points Tx
DQT deviation DQT DEV Rotary Encoder Five freq points Tx
DTMF deviation DTMF DEV Rotary Encoder Center freq point Tx
FFSK deviation FFSK DEV Rotary Encoder Center freq point Tx
Tone deviation TONE DEV Rotary Encoder Center freq point Tx
Battery detect BATT Rotary Encoder Center freq point Tx
Sensitivity SENS Rotary Encoder Five freq points Rx
Squelch SQL Rotary Encoder Five freq points Rx
RSSI (low) LOW RSSI Rotary Encoder Five freq points Rx
RSSI (high) HIGH RSSI Rotary Encoder Five freq points Rx
3) Parameter adjustment
Rx Part
Set the general test set and the radio, and make sure that the
test set is in its Rx interface, and the radio is in the Tuning
Mode.
1. Sensitivity: SENS
a) Set the signal strength of the general test set to be -119dBm
(wideband/narrowband), set its modulation signal to be 1kHz,
and the deviation to be ±3kHz (wideband), ±1.5kHz
(narrowband). Set the filter of the general test set to be in the
bandpass status.
b) Press “ ” key or “ ” key to select SENS in the radio.
Then turn the volume knob of the radio to make the output
audio power indicated in the general test set to be 500mW.
Then adjust the five frequency points.
c) Press key “1”, “2”, “3”, “4”, “5” respectively (corresponding
to the five frequency points of the radio), turn the rotary
encoder to make the SINAD indicated in the general test set to
be ≥ 12dB. Then press “ ” key to save.
2. Squelch: SQL CLOSE, SQL OPEN
a) Set the signal strength of the general test set to be -121dBm
(SQL OPEN)/-123dBm (SQL CLOSE), set its modulation
signal to be 1kHz, and the deviation to be ±3kHz (wideband),
±1.5kHz (narrowband). Set the filter of the general test set to be
in the bandpass status.
b) Press “ ” key or “ ” key to select SQL OPEN/SQL
CLOSE in the radio. Then turn the volume knob of the radio to
make the output audio power indicated in the general test set to
be 500mW.
c) Turn the rotary encoder. When the value displayed keeps
stable, press “ ” key to save. (Press key “1”, “2”, “3”, “4”,
“5” respectively to adjust the five frequency points of “Low”,
“Lower”, “Mid”, “Higher”, and “High”)
Note: Press the “Redial Button” to switch between
wideband and narrowband.