Emerson-Radio-and-Phonograph-Corp-120473B 电路原理图.pdf

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1、VOLUME R-20, MOST-OFTEN-NEEDED 1960 RADIO SERVICING INFORMATION EMERSON R DIO Model Chassis I_ J1 4 i r w in ts 5 St *S M W 38c MOMP 57/, m Model 901-B 903- B 906-B 904- B 905- B 120467B 120462B 120473B 120458B 120471B 3 rT* nr? /1 S9S ETCHED PRINTED CIRCUIT RESISTANCE READINGS SYM. TUBE PIN 1 PIN 2

2、 PIN 3 PIN 4 PIN S QXH PIN 7 V.l 12AX7 6.8 MEG 0_ 0 8 * 570K 6.8 MEG -ft? 50EH5 33 470K 8 38 470 K * 490 * 400 V-3 50EH5 33 470K 38 68 470K 3 MEG * 400 USED CH-120473-B ONLY (POWER MONITOR) * Measured to junction of R*17, C-16. CONDITIONS FOR VOLTAGE AND RESISTANCE READINGS 1. Voltages indicated or*

3、 positive d.c., resistances in ohms( unless otherwise indicated. Z Measurements made with Voltohmyst or equivalent. 3. All measurements taken from pin to B minus unless otherwise indicated. 4. Voltage measurements taken with: A) Line voltage maintained at 117 volts a.c. B) Loudness control set for m

4、inimum volume. C) Record changer in “off* position. 5. Resistance measurements taken with: A) Power line cord disconnected from outlet. B) Loudness control set for minimum volume. 6. Nominal tolerance on component values makes possible a variation of 15% in voltage and resistance readings. 7. N.C. d

5、enotes no connection, K is kilohms, Meg. is mego hms. (Resistances marked * are measured to Junction of R-17, C-16). 8. Filament resistances given are cold readings. IPfMM Mill TO* CHAM* gCffll OWQf :i LM COM TtPH | j . T1 T5 S i . *LTtlW*Tl | CERAMIC CAPACITORS.CAPAClTY IN f0 chassis II0441*. . MICRO-MICROFARADS TUBULAR CAPACITORS.CAPAClTY IN MICROFARADS ri I RfSISTORS IN OWMSl K 1000 OHMS) AND l WATT UNLESS FWT10 !I CHASSIS 120473-0 AC SECTION SHDWN (“POWER MONITOR* | NOTE- IHTlANALlM n CORRECT PHASING or SPEAKERS MUST BE OBSERVEE 40 收音机爱 好者资料库 RadioFans.CN