Admiral-YG827 电路原理图.pdf

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1、ONE TURN VOLUME R-26, MOST-OFTEN-NEEDED 1966 RADIO SERVICING INFORMATION MODEL CHART Admiral MODEL NAME FINISH CHASSIS YG827 Kimberly T an YG829 Kimberly Charcoal YG837 Dunbar Brown YG839 Dunbar Charcool 5V6 YG841 Aurora Walnut YG851 Galaxy Walnut 5V6A YG861 Golden Classic Walnut 5W6 (For circuit di

2、agram see next page, directly at right) SERVICE HINT Severe hum on these chassis can be caused by a breakdown of the Output Transistor Q5, No. 57C6-14- Should this be encount ered, replace the transistor and change R19, 24 ohm, % watt resistor to 36 ohm Vi watt for increased reliability. When servic

3、ing the chassis for other reasons, R19 should be changed to 36 ohms to avoid the possibility of damaging Q5. Some chassis will already have this change. YG830 SERIES SHOWN FULLY CLOSED C23 R23 T3 C20 R1 R4 R3 R5 Q2C6L2 C7 T1 C22 Q4 T2 R21 R22 CR2 TOP VIEW OF CHASSIS SHOWING ALIGNMENT POINTS AND COMPONENTS ONE TURN DIAL STRINGING DIAGRAM, 5W6 RED M YE LOW EBC CHASSIS Rll 70V DC U 15V DC 03 GROUND C20B C20A BOTTOM VIEW OF CHASSIS SHOWN FULLY OPEN DIAL STRINGING DIAGRAM, 5V6, 5V6A 12 收音机爱 好者资料库 RadioFans.CN 714E404- 13 收音机爱 好者资料库 RadioFans.CN