RCA-Victor-Co-Inc-BP-10 电路原理图.pdf

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1、MANUAL OF 1941 MOST POPULAR SERVICE DIAGRAMS IBS COMV. 1T4- l. F 1S5 2ND DET, AF, AVC * *h -iKr 1 Lf .it is not necessary to replace the complete assembly of lid and front panel, as either one may be replaced separately in a few minutes by taking out the hinge pins as described below. First remove t

2、he three self -tapping screws that hold the chassis in the center case, and remove the case. Unsolder the leads from the loop lugs. (a) With lid closed, cut hinge pins at point A with sharp cutters. (b) Start removal of pin sections as shown, using long -nose pliers. (c) Grasp end of pin section wit

3、h long -nose pliers and ,pull out of hinge. (d) Install new lid, or new front panel, using the replacement hinge pins and springs that are provided with replacement lids and panels. Arrange springs as shown. Apply a small amount of Thermoplastic Cement (G.E. ZV 5057) near outer end of each pin to in

4、sure tight and permanent fit. CI C6 C2 -ANT. r1300 KC. C5 -05C. /1620 KC. ,CYj L2- IR 3.3 MEG. C7 IO5 MFD. RED OSC. WEBr 600 KC. E.7 MEG C5 .02 MFD C16 I MMF. .001 MEP TIB _ 20MMF -428 MEG. IC17 = MFlo D. RED RoZ 3.3IZ MEG. o+ YEL OW ( dI .Br, BAT. -7V. OZON fo7 VOLTS VOLTAGES SHOULD HOLD WITHIN t 2

5、0 Y. WITH RATED BATTERY VOLTAGE. * MEASURED WITH CHANALYST OR VOLTOHMYST. Replacing Lid or Chrome Panel Low Output: Low output on BP -10 Models that have elliptical speaker may be due to the 1S4 out- C2O 005 MrO. TI 1.01/ Oa 1O 1110 CaLe In nL SPEAKER AC BAT 11/2NDLTaI BLACK- BROWN o SI ONIJD. P-849

6、90 put tube lying close to the speaker magnet, causing disturbance of the space charge in the tube. To remedy this condition, install a felt pad between the speaker frame and the tube to keep the tube upright in its socket and spaced away from the magnet. Loose Control Knobs: If for any reason eithe

7、r the tuning or volume control knob on Model BP -10 should become loose on its shaft, it may he rigidly mounted in the following manner: (a) Remove the loose control knob from its shaft and scrape off the old cement from both shaft and control knob. (b) Apply a generous even coating of a good cement

8、 to the shaft region which is to engage the knob. G.E. Thermoplastic cement, ZV -5057, is excellent for this purpose; it is a green fluid, easily thinned with acetone if necessary. (c) Alrow the cement on the shaft to air-dry, to evaporate any acetone present. (d) Apply a small amount of heat to the shaft, sufficient to soften the cement. (e) Mount knob on shaft while cement is still soft, and allow a few minutes for drying. 收音机爱 好者资料库 RadioFans.CN