Galvin-Mfg-Co（Motorola）-SF11B 电路原理图.pdf
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Galvin-Mfg-Co（Motorola）-SF11B 电路原理图.pdf
VOLUME R-19, MOST-OFTEN-NEEDED 1959 RADIO SERVICING INFORMATION MOTOROLA MODELS CHASSIS SF11B SF11N HS-703 HS-703 L LEFT CHANNEL m INPUT T VIA 1/2-12AX7A VOLTAGE AMP C9|100_Rl5. Cai/.0Q5 . 7/ RIGHT CHANNEL < INPUT V2 1 7 35C5 PWRAMP KO*m 1 ? YootI LEFT CHANNEL SPEAKER iL+:; 3 s SPEAKER RIGHT CHANNEL PLUG SPEAKER TIP SLEEVE VlB 1/2-12AX7A VOLTAGE AMP R20 15 2 R2i 47 “LTCSB i 50MF 5 CAPACITORS - Decimal values in MFt all others in MMF unless otherwise specified. VOLTAGES - Measured from point indicated to B- with a VTVNL +10%. No signal in. B* -sir Chassis rrb-f Record changer frame On some units, the phono input cable colors were reversed. RECORD CHANGER WIRING The chassis of this amplifier is isolated from the AC power line by a capacitor to eliminate the shock hazard when handling the chassis. However, as an additional precau tion, when servicing this amplifier, an isolation transformer should be inserted between the power line and the chassis. TO REMOVE CHASSIS FROM CABINET 1. Remove 3 control knobs. 2. Remove 3 baffle mounting screws and unscrew speaker jack mounted on baffle; then remove baffle. 3. Remove record changer mounting board screws. 4. Lift mounting board and record changer high enough to permit access to bottom of changer. 5. Unplug phono cables connected to record changer ”R” and MLM jacks, also unplug phono power plug. 6. Remove 4 chassis mounting nuts. 7. Unsolder speaker leads. 8. Remove chassis from cabinet. TO REMOVE RECORD CHANGER FROM CABINET 1. Remove 3 baffle mounting screws and unscrew speaker jack mounted on baffle; then remove baffle. 2. Remove record changer mounting board screws. 3. Lift mounting board and record changer high enough to permit access to bottom of changer. 4. Unplug phono cables connected to record changer MRM and MLM jacks, also unplug phono power plug. 5. Turn the two record changer mounting screws fully clockwise (down flush against changer base). 6. Place clips, located at ends of record changer mount ing screws, so that they are parallel with the screws. 7. Remove record changer from cabinet. 95 收音机爱 好者资料库 RadioFans.CN
