Crosley-Corp-41T 电路原理图.pdf

VOLUME R-17, MOST-OFTEN-NEEDED 1957 RADIO SERVICING INFORMATION CHASSIS 41T 4. CROSLEY Models: TIBK, T-41GN T-41RD T-41GY, T41IY T2 V3 C9 VIEWED FROM STAMPED SIDE V5 2BE6 )&t ,-F TRANS 12806 23* l-F TRANS I2AV6 J R9A R9C ”CSb R9B 50C5 1. 2. 3. BOTTOM VIEW ALIGNMENT PROCEDURE Remove chassis from the cabinet. Connect an output meter across the speaker voice coil (3. 2 ohms) terminals. FeedanR-F signal modulated 30%at 400 cycles to the receiver, as indicated in the alignment chart. Connect signal generator through dummy antenna to mixer grid when aligning I-F transformers, and radiate signal to loop antenna whenmakingthe oscillator andantenna trimmer adjustment. Turn the Volume Control to maximum clockwise position and adjust the signal generator output to produce approximately mid-scaledeflection of the output meter, but maintain signal generator output as low as possible to prevent AVC action. NOTES K* lOOO.ALl. TOLERANCES 20% UNLESS OTHERWISE NOTEO. ALL RESISTANCE VALUES |N OHMS ft CAPACITANCE VALUES IN MMF. UNLESS OTHERWISE NOTED. NUMBER ONE TERMINAL OF l-F TRANSFORMERS CLOCKWISE* 0flCN 00T NUM0ERS PROCRESS l“F* 455KC COMMON WIRING- DUMMY ANTENNA O SIGNAL 200 MME GENERATOR 0UTPUT .05 MFD. O-)|- TO MIXER GRID : 33K lOHMS -TO B- Additional service material on the next page adjacent at right. ALIGNMENT CHART Alignment Signal Generator Output Position of Tuning Gang Adjust for Max. Output Remarks 1 Freq. in KC. TO 455 Dummy Antenna Mixer grid pin 7 of VI Open A & B 2 455 Dummy Antenna Mixer grid pin 7 of VI Open C & D 3 Repeat steps 1 and 2 until maximum output is obtained. See note 1 4 1620 Radiated Sig. Antenna Open E See note 2 & 3 5 1400 Radiated Sig. Antenna Tune in Signal F See note 2 & 3 amctum <*.uu acuuiuicgi loop antenna vyeuow wire to inside of loop winding). 2. Loop antenna should be positioned with respect to cabinet and chassis so that no further adjustment is re quired when chassis is placed in the cabinet. 3. The signal can be radiated to the antenna by placing the output lead of the signal generator close to the loop antenna. 18 收音机爱 好者资料库 RadioFans.CN