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STR-SE381 SERVICE MANUAL US Model Manufactured under license from Dolby Laboratories Licensing Corporation. “Dolby” “Pro Logic” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation. SPECIFICATIONS Outputs TAPE/MD REC OUT: Audio power specifications Voltage: 150 mV, Impedance: 10 kilohms...
MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE Earth Ground COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS Fig. A. Using an AC voltmeter to check AC leakage.
STR-SE381 SECTION 2 SECTION 3 TEST MODE DIAGRAMS INITIALIZATION MODE AM CHANNEL STEP 9 kHz/10 kHz 3-1. CIRCUIT BOARDS LOCATION All preset contents are cleared when this mode is activated. Use SELECTION MODE SECONDARY board this mode before returning the product to clients upon Either the 9 kHz step or 10 kHz step can be selected for the AM completion of repair.
STR-SE381 3-3. SCHEMATIC DIAGRAM — DISPLAY SECTION — • See page 6 for Waveforms. • See page 25 for IC Pin Functions. • See page 27 for IC Block Diagrams. — 9 — — 10 —...
STR-SE381 3-6. PRINTED WIRING BOARD — MAIN SECTION — • Semiconductor Location TM601 J402 J403 TM001 SURROUND SPEAKER Ref. No. Location TM701 ANTENNA TAPE /MD VIDEO REAR CENTER FRONT SPEAKERS D610 REC OUT TV/DBS AUDIO OUT AUDIO IN MAIN D710...
3-11. IC PIN FUNCTION DISPLAY BOARD IC201 : µPD78044FGF-064-3B9 (SYSTEM CONTROL) Pin No. Pin Name Description DIG7 DIG6 DIG5 DIG4 Fluorescent indicator tube drive. DIG3 DIG2 DIG1 — Power supply (+5V). S. CLK System clock. S. DATA System data. PLL. DATA PLL data input from TU001.
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Pin No. Pin Name Description VOLUME UP Volume up. VOLUME DOWN Volume down. STANDBY — Standby LED drive. SYS. POWER System power ON/OFF. RDS. DATA. IN RDS data input terminal (EXCEPT Australian, E, Saudi Arabia, PX model). RDS. CLK. IN RDS clock input terminal (EXCEPT Australian, E, Saudi Arabia, PX model).
SECTION 5 DISPLAY ELECTRICAL PARTS LIST Note: • -XX, -X mean standardized parts, so they may • COILS When indicating parts by reference number, have some difference from the original one. uH: µH please include the board name. • Items marked “*” are not stocked since they •...