Emerson-Radio-and-Phonograph-Corp-818B 电路原理图.pdf

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1、VOLUME R-16, MOST-OFTEN-NEEDED 1956 RADIO SERVICING INFORMATION EMERSON RADIO MODELS - 818B, 836B CHASSIS - 120159-B AMPLIFIER CHASSIS CONTROL CHASSIS NOTE RESISTORS IN OHMS, CAPACITORS IN MFD*S UNLESS OTHERWISE NOTED. gv AC. v 8.8V. AS-. VOLTAGE READINGS ON SCHEMATIC DIAGRAM 117 VDLTS AC ONLY 180 C

2、 PS) CONDITIONS FOR VOLTAGE AND RESISTANCE READINGS 1. Voltages indicated are positive d.c., resistances in ohms, unless otherwise indicated. ! 2. Measurements made with voltohmyst or equivalent. *- -l 3* All measurements taken from pin to B neutral unless otherwise indicated. 4. Voltage measurement

3、s taken under the following conditions: a) Use adapter plug in socket X-2 shorting pins 2 and 3 only. This supplies a.c. to the amplifier without having to have the phono motor on, or the control chassis connected and in the on” position. b) Line voltage maintained at 117 volts a.c. only. 5. Resista

4、nce measurements taken with: a) Power line cord disconnected from outlet. b) Loudness control set for maximum volume. 6. Nominal tolerance on component values makes possible a variation of t 15% in voltage and resistance readings. 7. N.C. denotes no connection, K is kilohms, Meg. is megohms. Resistances marked are measured to pin 8 of rectifier 35Z5GT (B +-) RESISTANCE READINGS FOR CHASSIS 120159-B REVISED _ SYMBOL 12AX7 35L6GT 35L6GT 35Z5GT 10 meg. 48 80 115 30 收音机爱 好者资料库 RadioFans.CN