Ranger_tr936966 Cb Tranciever_service Manual

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TR-936 
TR-966  
 CHAPTER 4 
ALIGNMENT 
 
 
 
4.0 REQUIRED TEST EQUIPMENT 
 
c DC Power Supply (13.8VDC, 10A) 
d RF Wattmeter (25~60 MHz, 25W)  
e Multimeter (Digital) 
f Automatic Modulation Meter 
g Audio Signal Generator 
h Frequency Counter (100 MHz) 
i RF Signal Generator (100 MHz)   
j Automatic Distortion Meter 
k Oscilloscope (50 MHz) 
l 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 is used for the test setup or alignment shown in Figure 4-1 
Transmitter Test Setup and Figure 4-2 Receiver Test Setup. This test setup is used in part or total 
during the following adjustments and refer to Page 16 for adjustment location. 
 
4.1.1 PLL ALIGNMENT 
 
ITEM U.U.T. SETTING  ADJUST 
POINT MEASUREMENT 
VCO  Disconnect ‘Short PCB’ from TP7, TP8 & TP9. 
Set radio to CH 1 AM RX mode. 
Connect Voltmeter to TP2.  
 
L14  
 
2.5 VDC ± 0.1 
    
  Set CLARIFIER Control to 12 o’clock. (TR-966)
Connect Oscilloscope to TP3.  
L15  
Adjust for max.     
  Connect Frequency Counter to IC3 (Pin 8).  VC1 
10.2400MHz ± 20Hz     
AM Frequency  Set radio to CH 1 AM RX mode. 
Connect Frequency Counter to TP3.  
L20  
16.2700MHz ± 20Hz 
    
USB Frequency 
(TR-966) Set radio to CH 1 USB RX mode. 
Connect Frequency Counter to TP3.  
L21  
16.2725MHz ± 20Hz 
    
LSB Frequency 
(TR-966) Set radio to CH 1 LSB RX mode. 
Connect Frequency Counter to TP3.  
L22  
16.2675MHz ± 20Hz 
    
TX Offset 
Frequency Set radio to CH 1 AM TX mode. 
Connect Frequency Counter to TP3.  
VR7  
16.2675MHz ± 20Hz 
    
AM OSC  Set radio to CH 1 AM TX mode. 
Connect Frequency Counter to TP5.  
L23  
10.6950MHz ± 10Hz 
    
USB OSC 
(TR-966) Set radio to CH 1 USB TX mode. 
Connect Frequency Counter to TP6.  
L24  
10.6925MHz ± 10Hz 
    
LSB OSC 
(TR-966) Set radio to CH 1 LSB TX mode. 
Connect Frequency Counter to TP6.  
L25  
10.6975MHz ± 10Hz 
    
 
  
						

							 - 14 - 4.1.2 TRANSMITTER ALIGNMENT 
 
ITEM U.U.T. SETTING  ADJUST 
POINT MEASUREMENT 
BIAS Current 
(TR-966) Set radio to CH 19 USB TX mode. 
Modulation Off. 
Connect current meter to TP7(+) and TP9 (-). 
Connect current meter to TP7 (+) and TP8 (-). 
  
 
VR12 
VR10  
 
100 mA 
50 mA 
SSB APC 
(TR-966) Set radio to CH 19 USB RX mode. 
Connect Multimeter to TP7. 
 VR17 12.5 VDC 
 
SSB TX Power 
(TR-966) Connect “short PCB” to TP7, TP8 and TP9. 
Connect RF Power Meter to antenna jack. 
Set radio to CH 19 USB TX mode. 
AF signal 30mV, 1 KHz to microphone. 
Set MIC GAIN Fully Clockwise. 
 L40,L42, 
L43,L44 Maximum Output 
Spurious Emission 
Minimum. 
Balance Power 
Between CH1 and 
CH40. 
TX Power 
(TR-936) Connect RF power Meter to antenna jack.  
Set radio to CH19 AM TX mode. 
Modulation off. 
 L40,L42, 
L43,L44 Maximum Output 
Spurious Emission 
Minimum. 
Balance Power 
Between CH1 and 
CH40. 
 
SSB ALC 
(TR-966) 
 Set radio to CH 19 USB TX mode. 
AF signal 30mV, 1 KHz to microphone. 
  
VR13 
  
11.5 W 
SSB Carrier 
Balance 
(TR-966) Set radio to CH 19 USB TX mode. 
Set MIC GAIN Fully Counter Clockwise. 
Connect Oscilloscope to antenna connector. 
  
VR6  
Spurious Emission to 
Minimum. 
AM TX  
Power Set radio to CH 19 AM TX mode. 
Modulation Off. 
  
VR14 
  
3.8 W 
RF Power 
Meter Set radio to CH 19 AM TX mode. 
Modulation Off. 
Set S-RF/CAL/SWR Switch to S-RF position.  
VR9 Adjust RF Power 
meter needle until it 
is in-between the 
green and red bar on 
TX PWR scale. 
 
AM Modulation  Set radio to CH 19 AM TX mode. 
AF signal 30mV, 1 KHz to microphone. 
Set MIC Gain fully Clockwise. 
  
VR16  
90% 
 
 
 
 
 
 
4.1.3 RECEIVER ALIGNMENT  
						

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ITEM U.U.T. SETTING  ADJUST 
POINT MEASUREMENT 
AM Sensitivity  Set radio to 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. 
Set TONE Fully Clockwise. 
Set CLARIFIER Control to 12 o’clock. 
(TR-966)
Connect RF SG to antenna jack  
Frequency 27.185 MHz, 1uV. Mod 30%. 
  
L2,L3,L5,L6, 
L7,L8,L9,L1
0
 
Audio Output > 2V 
S/N > 10 dB. 
 
  Set radio to CH 40 AM RX mode. 
RF SG setting 27.405 MHz. 
Set radio to CH 1 AM RX mode. 
RF SG setting 26.965 MHz. 
  
L5,L6 
 
  
For Balance Between 
CH 1 and CH 40. 
USB Sensitivity 
(TR-966) Set radio to CH19 USB RX mode. 
Set VOL Control Fully Clockwise. 
RF SG setting 27.186 MHz, 0.5uV. Mod off. 
  
L11,L12  
Audio Output > 2V 
S/N > 10dB. 
LSB Sensitivity 
(TR-966) Set radio to CH19 LSB RX mode. 
Set VOL Control Fully Clockwise. 
RF SG setting 27.184 MHz, 0.5uV. Mod off. 
  
L11,L12  
Audio Output > 2V 
S/N >10dB. 
NB Adjust  Set radio to CH 19 AM RX mode 
RF SG setting 27.185 MHz, 1000uV. Mod off. 
Set NB/ANL/OFF switch to NB/ANL position. 
Connect Multimeter to TP1 (D2 cathode). 
  
L1  
DC Voltage to max. 
( > 2.0V ) 
AM Squelch  Set radio to CH 19 AM RX mode. 
Set SQ Control Fully Clockwise. 
RF SG setting 27.185 MHz, 1mV. Mod 30%. 
  
VR4  Adjust very slowly 
until squelch just 
open. 
SSB Squelch 
(TR-966) Set radio to CH 19 USB RX mode. 
Set SQ Control Fully Clockwise. 
RF SG setting 27.186 MHz, 1 mV. Mod off. 
  
VR3  Adjust very slowly 
until squelch just 
open. 
AM S-Meter  Set radio to CH 19 AM RX mode.  
RF SG setting 27.185 MHz, 100uV. Mod 30%. 
  
VR1 For a reading of “9” 
on the “S” scale. 
SSB S-Meter 
(TR-966) 
 
 Set radio to CH 19 USB RX mode.  
RF SG setting 27.186 MHz, 100uV. Mod off. 
  
VR2  
For a reading of “9” 
on the “S” scale 
 
  
						

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Main PCB Adjustment Location 
 
 
 
 
 
 
 
 
 
  
						

							 - 17 - Figure 4-1 Transmitter test setup 
 
  
Figure 4-2 Receiver test setup 
 
 
 
 
 
 
 
 
 
 
 
 
  
						

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TR-936 
TR-966  
 CHAPTER 5 
MAINTENANCE 
 
 
 
5.0 PRECAUTIONS 
The inherent quality of the solid-state components used in this transceiver will provide many years of 
continuous use. Taking the following precautions will prevent damage to the transceiver. 
 
(i) Never key the transmitter unless an antenna or suitable dummy load is connected to the antenna 
receptacle.  
 
(ii) Ensure that the input voltage does not exceed 16 VDC or fall below 11 VDC. 
 
(iii) During alignment, do not transmit for more than 10 seconds at a time. Transmitting over long 
periods can cause heat built-up and cause transmitter damage. 
 
5.1 PERIODIC INSPECTION 
This unit is aligned at the factory to deliver maximum performance. However, continued performance 
cannot be expected without periodic inspection and maintenance. Important points to be checked 
regularly are as follows; 
 
Check Item  Action 
Whip antenna 
(option) If cracked or broken, replace it. 
Coaxial cable  If sheath is cracked, seal with 
vinyl tape. If immersed with 
water, install new coaxial cable.  
Coaxial & power 
plug connections If loosened, reconnect. If 
corroded, clean contacts. 
Battery connection  If corroded, clean power 
terminals. 
Ground terminal  If corroded, clean terminal. 
 
5.2 FUSE REPLACEMENT  
To protect the equipment from serious damage, a fuse is provided on the power supply lines. The fuses 
protect against over voltage / reverse polarity or internal fault of the equipment. If the fuse has blown, 
first find out the cause of the trouble before replacing it. A fuse rated for more than the transceiver 
requirement should not be used, since it may permanently damage the equipment. Damage due to over 
fusing is not covered by the warranty. 
  
 
 
 
 
 
 
 
  CHAPTER 6  
						

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TR-936 
TR-966  DIAGRAMS & 
PARTS LIST 
 
 
 
6.0 GENERAL 
Information on most electrical and mechanical parts is included in the parts list. The reference 
designators are in alphanumeric order. 
 
6.1 ORDERING REPLACEMENT PARTS 
Parts orders should be referred to the parts department at: 
 
• Ranger Communications, Inc. 
   401 W. 35
TH ST, # B 
   NATIONAL CITY, CA 91950-7909 
 
Tel: (619) 426-6440 
Fax: (619) 426-3788
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
  
						

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PART LIST: 
 
TR-936 / TR-966 ROTARY SW P.C.B 
 
ITEM REFERENCE 
NUMBER RANGER PART  
NUMBER DESCRIPTION REMARK 
1    EPT690021A  ROTARY SW PCB   
2 R201,R206-R213  RCY011021Z 
 1K Ω 0.1W TR-936 
3 R201  RCY014714Z 
470 Ω 0.1W TR-966 
4 R202-R205,R214  RCY012224Z 
2.2K Ω 0.1W TR-936 
5 R214  RCY013324Z 
3.3K Ω 0.1W TR-966 
6 R215  RCY015624Z 
5.6K Ω 0.1W  
7 R202-R205,R206-R213  RCY011024Z 
1K Ω 0.1W TR-966 
8 D223  RCY010004Z 
0 Ω 0.1W  
9 D201-D205,D217-
D219,D222,D225 EDSS00355Y DIODE 1SS355 TR-936 
10 D201-D205,D217-
D219,D224,D225 EDSS00355Y DIODE 1SS355 TR-966 
11 D206-D213,D221  EDSS00181Y  DIODE 1SS181   
12 D214,D215,D220  EDSS00184Y  DIODE 1SS184   
13 Q204  TY2SC2712G TR 2SC2712GR   
14  Q201-Q203  TYZRN1403Z   TR RN1403   
15  J303,J304,J305  EX07N48223  PCB CONN/S 2PIN   
16  J302  EX07N48490  PCB CONN/S 4PIN   
17  J301  EX07N48209  PCB CONN/S 10PIN   
18 S301  EWRT32000S ROTARY SW   
  
REMARK: 
COPPER SIDE (BLUE)