Emerson-Radio-and-Phonograph-Corp-893B 电路原理图.pdf

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1、VOLUME R-19, MOST-OFTEN-NEEDED 1959 RADIO SERVICING INFORMATION Emerson Models 834X, 890, 892A, Chassis 120394B TWISTED LEADS V-1 25 L6 GT RESISTORS ARE IN OHMS(KtOOO OHMS) AND 1/2 WATT UNLESS OTHERWISE SPECIFIED. CAPACITORS ARE IN MICROFARADS UNLESS OTHERWISE NOTED. I R_1 5 I 5000 volume? (CONTROL

2、TONE CONTROL 117 VOLTS AC ONLY (60 CPS) (ON VOLUME CONTROL) Ese-i RECTIFIER Speakers used *in Model 890. ftCIST0*3 IN OHMS! K 1000 0HM9I MW t/JWATT.CAPAClTOM IN MICRO*ANAOS, UNlfSS OTHMWIM NOTCO COMUCT PHASING Of MAKSNSMUST S( OMtffVfO Emerson Model 89IB, Chassis 120399B V-SLOT CARTRIDGE ACTIVATOR S

3、ELECTOR - SAR STYLUS AND SELECTOR BAR EMERSON PT. NO. 960B27 SONOTONE PT. NO. 9987-S 1. Voltages indicated ore posiiive d.e., resistances in ohms, unless otherwise indicoied. 2. Meosuremenis mode with vollohmysl or equivolent. 3. All meosuremenis token from pin 1o B neutral unless other wise indicat

4、ed. 4. Voltage meosuremenis token with: a) Line valtoge maintained at 117 volts o.c. only. b) Volume control set for maximum volume. c) Phono plugs disconnected. 5. Resistance meosuremenis token with: a) Power line cord disconnected from outlet. b) Volume control set for maximum volume. c) Phono plu

5、gs disconnected. 6. Nominal tolerance on component values moke possible a yoriotio of 15% in voltage and resistance readings. TO REPLACE STYLUS AND SELECTOR BAR For best operotion ond record tracking, it is recommended that the stylus (needle) and selector bor (flip-over arm) be replaced as a single

6、 unit. To change this unit, proceed os fol lows: 1. Lift up tone arm* 2. With one hand, hold spring clip in a direction away from tone arm* 3* With other hand, slide out selector bar and stylus as shown in diogram. 4* To replace new stylus and selector bar, reverse above procedure* 33 收音机爱 好者资料库 RadioFans.CN