Drake_TR-7_serv.pdf

SERVICE MANUAL H. F. TRANSCEIVER Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU BD. *t 1 2 DESCRIPTION LOW PaSSFilter Module T/R Relay 2nd Mixer VC0 High Pass Filter Module Up-Converter Transmit Exciter Digital Control 2nd lF/Audio Passband Tuning/Reference IFSelectivity IFSwitching or NoiseBlanker Translator RIT 8 PTO Switchincl Circuitry - Power Amplifier Module PTO AUX-7 Connector PowerSupply/Regulator ASSY. # 17.18.19.20 Part of LOW Pass Filter n7 F I . 1-3 TR7 Module Locations Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 2-1 Parent Board Pictorial (Top View) (See Page 2-6 for Circuit Side) Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 2-3 Parent Board Pictorial (Bottom View) Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 2-5 Digital Control Board Pictorial Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 2-9 Up-Converter Board Pictorial Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 2-11 VC0 Board Pictorial - Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU TEST P I / 49 Fig. 2-13 Translator Board Pictorial Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 2-15 2nd Mixer Board Pictorial Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU - Fig. 2-17 IF Switching Board Pictorial Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU rork Scle naomr m Fig. 2-19 IF Selectivity Board Pictorial Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU - Fig. 2-21 PB TIReference Board Pictorial Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 2-25 2nd IFIAudio Board Pictorial, Version 2 Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 2-23 2nd IF/Audio Board Pictorial Version 1 Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 2-27 Jumper Board Pictorial Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 2-29 ALC Board Pictorial Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 2-30 High Pass Filter Parent Board Pictorial - 2-83 Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 2-31 High Pass Filter Switch Pictorial (Front like?; destroy the 7. Refer to figure 2-43 and identify the wrench calibration andlor compensation. It is highly recom- access hole in the rear of the PTO cover. Insert mended. therefore. that any PTO which requires at- a long (at least 3) 3/32 ALLEN wrench tention be returned to the factory for proper repair. straight through this hole, seating the wrench in the ALLEN set screw which serves as the shaft bearing. The proper wrench is available . It is possible to adjust the knob torque required to from the factory. Be sure to insert the wrench tune the PTO, should this become necessary. This is straight through the access hole. to avoid accomplished as follows: damaging any components inside the PTO. 8. Carefully adjust the set screw for the desired knob torque. Overtightening the adjustment 1. Remove the two plastic end caps from the sides screw must be avoided to prevent bearing of the front panel. Note that these caps are not damage. identical: there is a right and a left end cap. 9. Reverse the above procedure to reassemble the 2. Remove the DR7, if installed. (See Section 4-1). TR-7. Wrench Access Hole Fig. 2-43 PTO Torque Adjustment Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 4-1 DR7 Removal Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 4-2 DR7 Board Pictorial Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Fig. 4-4 AUX7 Board Pictorial Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU TEST POINT Fig. 4-6 NB-7 Board Pictorial, Version 1 Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU TEST POINT Fig. 4-8 NB-7 Board Pictorial, Version 2 Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU Downloaded by RadioManuai.EU