RCA-Victor-Co-Inc-RC-1199B 电路原理图.pdf

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1、VOLUME R-21, MOST-OFTEN-NEEDED 1961 RADIO SERVICING INFORMATION rca Victor i-tp-i series Chassis No. RC-1199B Circuit Board No. 962537-1 ferrite ANTENNA 02 2N4I0 1ST I F AMPL 03 2N4I0 2ND I F AMPL vll FOR EARPHONE os 1 ! 1 VO( 25 VI 8.0/fl J3, 0.16 V-i t _J._ - CRI DET P DlDDE if - 31 L 2N4I2 CONV l

2、o Unsolder the battery spring contacts from the circuit board DO NOT ATTEMPT TO REMOVE CONTACTS FROM CASE The battery contacts are heat sealed to the plastic case front 2. Unsolder the three leads from the speaker terminals The chassis may be serviced without disconnecting it from the speaker. 3 On

3、the 1-TP-l Series only, pull the dial knob off the tuning condenser shaft 4 Remove the knurled nut holding the earphone jack lo the case. 2 PM SPUR W- VOICE COIL 05 2N408 OUTPUT 06 2N408 OUTPUT Tl DSC COIL = dr _ CONT TERMINAL - 1 VIEW VOLTAGES MEASURED WITH *VOLTOMMYST FROM (-) BATTERY (A). SHOULD

4、HOLD WITHIN +J_ 4 0V *20% WITH NEW BATTERY, VOLUME CON 1=1 rca ratT TROL AT MINIMUM AND NO SIGNAL * K-IDDO ALL RESISTANCE VALUES IN OHMS -T 149 ALL CAPACITANCE VALUES LESS THAN 1.0 ARE IN -L MF. THOSE ABOVE 10 ARE IN MMF EXCEPT AS NOTED 5. Remove the Iwo screws holding the circuit board to the case and lift chassis from the case. 133 收音机爱 好者资料库 RadioFans.CN