Philco-Radio-and-Television-Corp-53-658 电路原理图.pdf

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1、MANUAL OF 1953 MOST-OFTEN-NEEDED RADIO DIAGRAMS PHILCO RADIO MODELS 53-656 AND 53-658 Alignment continued on page 83, adjacent at right. (All Philco material is reproduced through the courtesy of the MODEL 53-656 S (I,. Bottom View, Showing Symbolized Chassis 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1953 M

2、OST-OFTEN-NEEDED RADIO DIAGRAMS Philco, continued. ALIGNMENT PROCEDURE models 53-656 and 53-658 MODELS 53-656 AND 53-658 POINTERSet pointer to coincide with first index mark from left side of dial backplate (looking at front of dial backplate). RADIO CONTROLSSet volume control to maximum; set broadc

3、ast-special services switch, SW1, as indi cated in chart. OUTPUT METER-Connect across voice-coil terminals. SIGNAL GENERATORUse modulated output. OUTPUT LEVELDuring alignment, adjust signal- generator output to maintain output-meter indication below .5 volt. CRITICAL LEAD DRESS-To secure proper padd

4、ing capacity, the green lead from pin 6 of the 1R5 tube to Z1 must be dressed over the wiring panel, away from the chassis. The white lead which connects the low end of the aerial (LAI) to the broadcast-special services switch (SW1), must be dressed taut between the low-end tie lug and the retaining

5、 spring. SIGNAL GENERATOR CONNECTION DIAL TO RADIO SETTING Through a .1 -/rf* cendenser to 265 kc. pin 6 of 1R5 converter. Radiating loop. Soo noto bolow. DIAL SETTING 163G kc. (gang fully opon) *1630 kc. (gang fully opon) SPECIAL INSTRUCTIONS Sot broadcast-special services witch to broadcast positi

6、on. Adjust, in ordor glvon, for maximum output. Adjust for maximum output. If low-froquency dial tracking is far off, mako adjustmonts in stops 3 and 4 boforo making this adjustmont. Same as stop 2. 580 kc. 58G kc. Adjust fer maximum output while recking tuning control. Samo as stop 2. 580 kc. 580 k

7、c. Adjust fer maximum output. This adjustment should net be made unless dial tracking Is off, or sensitivity Is low at lew- frequency end (580 kc.). Samo as stop 2. 1500 kc. 1 SOO kc. (indox mark at right) Ropoat stops 3 and S until no furthor Improvomont is ohtainod. Adjust, in ordor givon, for max

8、imum output. Samo as stop 2. Samo as stop 2. Sot broadcast-spocial sorvicos switch to spocial sorvicos position. Adjust, in order given, for maximum output. Adjust, in order given, for maximum output. TC52nd l-f sec. TC42nd M prt. TC21 st l-f pri. TC31st i-f sec. C1B osc. shunt CIAr-f C19ABC aortal

9、C19CSS aerial C19BSS aerial series tracker Ropoat stops 7 and 8, and then ropoat stop 5. NOTE Mako up a slx-to-elght-twm, 6-inch diameter loop using insulated wire; connect to signal-generator leads and place near radio loop. *For proper adjustmont of die oscillator trimmer, fully opon the tuning ga

10、ng and insert a .006-inch, non-metalHc shim between die hoot of die rotor and the top of die stator plates. Close die tuning gang sufficiently to hold the shim in place, and Mien remove the shim without disturbing die gang sotting. Drive-Cord installation Details C19B CIRC (T0P)S LINE TO ATTE*YWITmV 1T4 RF AMPL ms | TC3 CONVERTER Cl eI3S3 c _ ti Y CORO GUIDE ON BACKPLATE HOLOS CORO AWAY FROM SHAFT DRIVE CORO 45-8750 (25 FT SPOOL) SPEAKER MOUNTED ON CHASSIS -(MODEL 93-896 ONLY) Top View, Showing Trimmer Locations 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN