Sony pmc dr 50 pmc dr 70l
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Extracted text from sony pmc dr 50 pmc dr 70l (Ocr-read)
Page 1
Ð 39 ÐÐ 41 Ð Ð 40 Ð 5-5. SCHEMATIC DIAGRAM Ð MAIN SECTION (1/3) Ð PMC-DR50L/DR70L Note: ¥ All capacitors are in mF unless otherwise noted. pF: mmF 50 WV or less are not indicated except for electrolytics and tantalums. ¥ All resistors are in W and 1/4 W or less unless otherwise specified. ¥ ¢ : internal component. ¥U: B+ Line. ¥H: adjustment for repair. ¥ Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ( ) : MW <>: LW ¥ Voltages are taken with a VOM (Input impedance 10 MW). Voltage variations may be noted due to normal produc- tion tolerances. ¥ Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal produc- tion tolerances. ¥ Circled numbers refer to waveforms. ¥ Signal path. F: FM f: MW L: LW r Waveforms Ð MAIN SECTION (1/3) Ð r Refer to page 74 for IC Block Diagram. 1 IC3 @Á 2 VOLT/DIV : 0.5 V AC TIME/DIV : 5 msec IC4 !¢ VOLT/DIV : 0.2 V AC TIME/DIV : 50 nsec 1.5Vp- p 75kHz 556mVp- p 4.332MHz
Page 2
Ð 42 ÐÐ 44 Ð Ð 43 Ð PMC-DR50L/DR70L 5-6. SCHEMATIC DIAGRAM Ð MAIN SECTION (2/3) Ð r Refer to page 74 for IC Block Diagrams. r Refer to page 45 for Waveforms. r Refer to page 45 for Notes.