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...

 - 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...

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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...

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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...

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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...