Sony ta mr 2 es service manual
This is the 26 pages manual for sony ta mr 2 es service manual.
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Extracted text from sony ta mr 2 es service manual (Ocr-read)
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2 TA-MR2ES TABLE OF CONTENTS 1. GENERAL ................................................................... 3 2. TEST MODE ............................................................... 4 3. DIAGRAMS 3-1. Block Diagram – AUDIO Section – ................................ 6 – MAIN/POWER Section – ............................................ 7 3-2. Printed Wiring Board – POWER SWITCH/INLET Section – ........................... 8 3-3. Schematic Diagram – AMP Section (1/3) – ................... 9 3-4. Printed Wiring Board – AMP Section – ......................... 10 3-5. Schematic Diagram – AMP Section (2/3) – ................... 11 3-6. Printed Wiring Board – MAIN COMB Section – .......... 12 3-7. Schematic Diagram – AMP Section (3/3) – ................... 13 4. EXPLODED VIEWS 4-1. Front Panel Section ......................................................... 17 4-2. Chassis Section ................................................................ 18 5. ELECTRICAL PARTS LIST .................................. 19 Flexible Circuit Board Repairing -Keep the temperature of the soldering iron around 270 °C during repairing. -Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). -Be careful not to apply force on the conductor when soldering or unsoldering. Notes on chip component replacement -Never reuse a disconnected chip component. -Notice that the minus side of a tantalum capacitor may be damaged by heat. SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the lead- free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular size) : LEAD FREE MARK Unleaded solder has the following characteristics. -Unleaded solder melts at a temperature about 40 °C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 °C. Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful! -Strong viscosity Unleaded solder is more viscou-s (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc. -Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder. SAFETY CHECK-OUT After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, metallized knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes.). Leakage current can be measured by any one of three methods. 1.A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The limit indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A) Fig. A. Using an AC voltmeter to check AC leakage. 1.5 k Ω 0.15 µF AC voltmete r (0.75 V) To Exposed Metal Parts on Set Earth Ground
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3 TA-MR2ES SECTION 1 GENERAL This section is extracted from instruction manual. ON POWER IN USE ATTENUATOR L R ++ * *To remove the cover Press either ends of the cover lid to remove the cover. After you have finished adjusting the ATTENUATOR L/R, place the cover lid back to its original position. Front panel of the amplifier 1POWER switch Press to turn the power on or off. 2 3ON indicator The ON indicator lights up as follows: –green: the power is on. –green (flashing three times): the amplifier s memory is cleared. –off: the power is off. IN USE indicator The IN USE indicator lights up as follows: –green: the amplifier is in use. –green (flashing): the IR ID TEST switch is set to ON. –green (fast flashing): the IR TEST function is in progress. –red (flashing): PROTECTION mode is turned on. –off: the amplifier is not in use. 4 1234 ATTENUATOR L/R Adjusts the maximum volume level of this amplifier to match the room and the speakers used. Parts and Controls Rear panel of the amplifier IR TEST IR ID AUTO POWER SELECTOR 12V TRIGGER IR REMOTE AUDIO R RL IN OUT IN IR IN 4 3 2 1TEST 12V TRIGGER IR IN AUDIO SENSINGOFFON VOL VOL POWER OFF POWER ON POWER ON / OFFMUTING IR OUT OUT L SPEAKERS AC IN 5IR TEST buttons (page 12) Press the appropriate button to output the IR codes you want to teach through the IR OUT terminal. 6AUDIO jacks (page 10) a) AUDIO IN RCA jacks for stereo line level audio input from a multi-room system. b) AUDIO OUT RCA jacks for looping out to another amplifier or component. NoteThis is a buffered audio connection, and this loop-through is active even when the IN USE indicator is off, as long as the AC power cord is plugged in and the POWER switch is on. 7SPEAKERS (page 10) Terminal which accepts speaker wire sizes up to 12AWG. Leave the AC power cord unplugged when you hook up speaker cables. 8 AC IN (page 10) Removable power cord for easy serviceability of the amplifier.912V TRIGGER jacks (page 10) a) IN A 3.5 mm monaural mini jack to turn on the amplifier via a 12-volt trigger input. b) OUT Enables the looping of amplifier control from one to the next to trigger multiple amplifiers from a 12-volt trigger output. q;IR REMOTE jacks (page 10) a) IR IN Connects to an outboard IR repeater system so you can operate the amplifier from a distant room. b) IR OUT A 3.5 mm monaural mini jack for the connection of an IR emitter to control other components individually. IR signals received will be routed to the IR sensor of the other components. Outputs IR from the IR TEST system built into the rear of the amplifier. qaIR ID switches (page 12) Select from 12 discrete IR code tables to communicate with up to 12 TA-MR2ES amplifiers (with individual IR ID) on one IR repeater network. qsAUTO POWER SELECTOR switch (page 11) Selects the method for activating the amplifier. 5 qs qa q; 9687