RangerRCI6300F HP 10m Tranciever Service Manual

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3.1 PLL CIRCUIT 
The Phase Lock Loop (PLL) circuit is responsible for developing the receiver’s first local oscillator 
signal and the transmitter’s exciter signal. The PLL circuit consists primarily of IC2, IC3, IC4, IC5 
Q25, Q27, Q28, Q29 and Q61. The PLL circuit is programmed by the rotary channel switch GPS-0501. 
The switch communicates the correct binary data information to the programmable divider inside of 
IC3. IC3 then controls the VCO (Voltage Controlled Oscillator), consisting of VCO to oscillate on the 
correct frequency. This signal is fed either into the receiver’s first mixer (for receive operation) or the 
transmitter’s mixer (for transmit operation). 
 
3.2 RECEIVER CIRCUIT  
The incoming RF signal comes into the radio via the antenna and into the front-end pre-amp, Q17. The 
RF signal is fed into the mixer circuit Q18 & Q19 and then into the IF section of the receiver 
(depending on the mode of operation). The signals is then detected by either the AM detector or FM 
detector and then fed to the audio amplifier section of the receiver and finally out to the speaker. 
 
3.3 TRANSMITTER MODULATION CIRCUIT 
(i) The transmitter modulation circuit modulates the low-level RF signal from the PLL exciter circuit 
with the user’s audio voice signal from the microphone. The audio from the microphone is then 
amplified and fed into the transmit amplifier circuit. 
 
(ii) If the transceiver is in the AM mode, the AF power amplifier modulates the last RF amplifier which 
produces a true amplitude modulated RF signal. 
 
3.4 TRANSMITTER AMPLIFIER CIRCUIT 
The transmitter takes the basic exciter signal from the TX mixer and amplifies it through a series of 
amplifiers consisting of Q50, Q51, Q49, Q47, Q48 and EPA010010A (only for RCI-6300F TB) where 
it is sent out to the antenna connector. 
 
 
 
 
 
 
 
 
 
 
  
						

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RCI-6300F HP / RCI-6300F TB FREQUENCY COUNTER CIRCUIT DIAGRAM 
  
						

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RCI-6300F HP / RCI-6300F TB ECHO BOARD (EB-99) CIRCUIT DIAGRAM 
 
  
						

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RCI-6300F HP  
RCI-6300F TB  
 CHAPTER 4 
ALIGNMENT 
 
 
 
4.0 REQUIRED TEST EQUIPMENT 
 
! DC Power Supply (13.8VDC, 20A) 
 RF Wattmeter (25~60 MHz, 100W)  
# Multimeter (Digital) 
$ Automatic Modulation Meter 
% Audio Signal Generator 
& Frequency Counter (100 MHz) 
 RF Signal Generator (100 MHz)   
( Automatic Distortion Meter 
) Oscilloscope (50 MHz) 
* Sinad Meter 
 
4.1 ALIGNMENT PROCEDURES 
This transceiver has been aligned at the factory and does not require any adjustments at installation. 
The required test equipment listed are used for the test setup or alignment shown in Figure 4-1 
Transmitter Test Setup and Figure 4-2 Receiver Test Setup. These test setup are used in part or total 
during the following adjustments and refer to Figure 4-3 for adjustment location. 
 
4.1.1 PLL ALIGNMENT 
 
ITEM U.U.T. SETTING  ADJUST 
POINT MEASUREMENT 
VCO Voltage Disconnect the “short PCB” from TP7, TP8 
and TP9. 
Set radio to Fr Pool 6, CH 40 AM RX mode. 
Set the +10KHz switch to OFF position. 
Connect Multimeter to TP2. 
Connect Oscilloscope to TP3.   
 
 
 
L14 
L15  
 
 
 
6.5 VDC 
± 0.1 
Maximum Output 
and Balance. (CH 1 
& CH 40) 
 
AM Frequency  Set radio to Fr Pool 1, CH 1 AM RX mode. 
Set radio to Pool 6, CH 40 AM RX mode. 
Connect Frequency Counter to TP3. 
 L20 
L17 17.5500 MHz + 20Hz 
18.9600 MHz + 20Hz 
TX Frequency  Set radio to Fr Pool 1, CH 1 AM TX mode.  
Connect Frequency Counter to TP3. 
 VR7 17.5500 MHz + 20Hz 
AM OSC  Set radio to Fr Pool 1, CH 1 AM TX mode. 
Connect Frequency Counter to TP5. 
 L23 10.6950 MHz + 20Hz 
 
 
 
 
 
 
4.1.2 TRANSMITTER ALIGNMENT 
  
						

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ITEM U.U.T. SETTING  ADJUST 
POINT MEASUREMENT 
TX Power 
 Set radio to Fr Pool 2, CH 19 AM TX mode. 
Connect “short PCB” to TP7, TP8 and TP9. 
Connect RF Power Meter to antenna jack. 
Set RF Power Fully Clockwise. 
 
 L40,L42,L43,
L44 
 
 
L40,L42 
 
 
 Power MAX. 
Spurious emission 
Min. 
 
Balance Power 
between CH 1 and 
CH 40. 
 
AM TX Power  Set radio to Fr Pool 2, CH 19 AM TX mode. 
Modulation off. 
 VR14 10W (RCI-6300F HP) 
50W (RCI-6300F TB) 
 
RF Power 
Meter Set radio to Fr Pool 2, CH 19 AM TX mode. 
Set SWR/S-RF switch to S/RF position. 
Modulation off. 
 VR9  Adjust RF Power 
meter needle until it is 
in-between the green 
and red bar on PWR 
scale. 
  
AM 
Modulation Set radio to Fr Pool 2, CH 19 AM TX mode. 
Set Mic Gain Fully Clockwise. 
AF signal 30 mV, 1 KHz to microphone. 
 VR16 90% 
FM Deviation  Set radio to Fr Pool 2, CH 19 FM TX mode. 
Set Mic Gain Fully Clockwise. 
AF signal 30 mV, 1 KHz to microphone. 
 VR5 4KHz 
Frequency 
Counter Adjust Set radio to Fr Pool 2, CH 19 AM RX mode. 
Set DIM/BRT switch to BRT position. 
 VC1 on 
frequency 
counter 
 Display should be 
28.9150 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4.1.3 RECEIVER ALIGNMENT 
 
ITEM U.U.T. SETTING 
ADJUST MEASUREMENT  
						

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POINT 
AM Sensitivity  Set radio to Fr Pool 2, CH 19 AM RX mode. 
Set RF Gain Fully Clockwise. 
Set SQ Fully Counter Clockwise. 
Set VOL Control at 2 o’clock. 
Set NB-ANL/OFF switch to OFF position. 
Connect RF SG to antenna jack  
Frequency 28.915 MHz, 1uV. Mod 30%. 
Set radio to Pool 6, CH 40 AM mode. 
RF SG setting 29.655 MHz. 
Set radio to Pool 1, CH 1 AM mode. 
RF SG setting 28.245 MHz. 
 L2,3,5,6,7,8, 
9,10 
 
 
 
 
 
L5,L6 
 
L5,L6 
 Audio output > 2V 
S/N > 10 dB. 
 
 
 
 
 
For Balance between 
CH 1 and CH 40. 
FM Sensitivity  Set radio to Fr Pool 2, CH 19 FM RX mode. 
Set MODE switch to FM mode. 
RF SG setting 28.915 MHz, 0.5uV. Mod 
3KHz. 
 L4  Audio output Max 
S/N > 20 dB. 
 
NB Adjust  Set radio to Fr Pool 2, CH 19 AM RX mode 
RF SG setting 28.915 MHz, 100uV. Mod off. 
Set NB-
ANL/OFF switch to NB/ANL 
position. 
Connect Voltmeter to TP1. 
 L1  DC voltage to max. 
( >2.0V ) 
AM Squelch  Set radio to Fr Pool 2, CH 19 AM RX mode. 
Set SQ control fully clockwise. 
RF SG setting 28.915 MHz, 1 mV. Mod 30%. 
 VR4 Slowly  Adjust very slowly 
until squelch just 
open 
AM S/RF Meter Set radio to Fr Pool 2, CH 19 AM RX mode.  
Set SWR/S-RF switch to S/RF position.  
RF SG setting 28.915 MHz, 100uV. Mod 
30%. 
 VR1  Meter needle to S9 
on the S scale 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 4-1 Transmitter test setup 
  
						

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Figure 4-2 Receiver test setup 
 
 
 
 
 
 
 
 
 
 
 
 
  
						

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Figure 4-3 Main PCB Adjustment Location