Sony XM2252HX free download

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XM-2252HX SERVICE MANUAL US Model Canadian Model AEP Model UK Model SPECIFICATIONS STEREO POWER AMPLIFIER MICROFILM ­1­ TABLE OF CONTENTS Specifications ... 1 1. SERVICING NOTE ... 2 2. GENERAL ... 3 3. ELECTRICAL ADJUSTMENTS Self-Diagnosis Function ... 7 Idling Adjustment ... 8 4. DISASSEMBLY 5-1. Bottom Plate, Panel (Front), Panel (Rear) Removal ... 9 5-2. AMP/Power Board Removal ... 9 5. DIAGRAMS 5-1. IC Block Diagrams ... 10 5-2. Printed Wiring Board ­ Amplifier Section ­ ... 11 5-3. Schematic Diagram ­ Amplifier Section ­ ... 13 5-4. Printed Wiring Board ­ Power Section ­ ... 15 5-5. Schematic Diagram ­ Power Section ­ ... 17 6. EXPLODED VIEWS ... 19 7. ELECTRICAL PARTS LIST ... 21 SECTION 1 SERVICING NOTE CANCELLING THE PROTECTOR DURING SERVICING Cut JW213 on the amplifier board to cancel the protector. After servicing always be sure to return JW213 to its original state. C929 C930 JW213 C927 C928 ­2­ SECTION 2 GENERAL This section is extracted from instruction manual. ­3­ ­4­ ­5­ ­6­ SECTION 3 ELECTRICAL ADJUSTMENTS SELF-DIAGNOSIS FUNCTION In addition, this unit comes with a function which alerts when settings of the Hi-Current and Hi-Voltage modes are wrong. There are two switches at the base of this unit to switch to the Hi-Current and Hi-Voltage modes respectively. When these two switches are not to set to the same modes, the Hi-Current and Hi-Voltage indicators on the top panel change from green to amber to indicate an error. "See INSTRUCTION MANUAL for more information." Hi-Current, Hi-Voltage switch P O W E R /P R O T E C TO R T SE OFF E AG OLT HI-V NT RE UR -C ER OV L MA ER TH Hi-Current, Hi-Voltage indicators If the switches are set properly, one will light up in green. If wrong, both will light up in amber. ­7­ M O D E NT RE UR HI-C IDLING ADJUSTMENT · L-CH (R-CH) Adjusting Method Connection: Digital voltmeter 2. Set the input signal setting to non-signal. 3. Apply a 14.4V power supply voltage between the +12V and REMOTE terminals and GND terminal. 4. Adjustments Connect a digital voltmeter between the two terminals of the cement resistors R149 and R150 (0.03 ) indicated as TP101 and TP102 (TP201 and TP202 for R-CH). Rotate the semi-fixed resistor VR101 and adjust so that the voltage between TP101 and TP102 comes between 0.5 mV and 1.1 mV with 0.8 mV as the center. Adjust R-CH in the same way. · Perform adjustments carefully as voltage changes are minute. · When adjusting fr