Sony TMR-RF450R Service Manual
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Sony TMR-RF450R, Ver 1.0 1998.06 MDR-RF430RK MDR-RF450RK Wireless Stereo Headphones MDR-RF430 MDR-RF450 Transmitter TMR-RF450R TMR-RF450R MICROFILM TMR-RF450R SERVICE MANUAL AEP Model RF STEREO TRANSMITTER SPECIFICATIONS TMR-RF450R is the component model block one in MDR-RF430RK/RF450RK. COMPONENT MODEL NAME FOR MDR-RF430RK/RF450RK General Carrier frequency 433.40 – 434.40 MHz Channel Ch1, Ch2, Ch3 Modulation FM stereo Frequency response 20 – 20,000Hz (MDR-RF430RK) 18 – 22,000Hz (MDR-RF450RK) Transmitter Power s
Sony TMR-RF450R, – 2 – SECTION 1 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 1-1. TX BOARD REMOVAL 3 8 4 2 1 Screws +P 2x10 7 Remove solder 6 Remove solder 5 TX shield plate Cabinet (Upper ) ANT board VCO board TX board Cabinet (Lower)
Sony TMR-RF450R, – 3 – SECTION 2 ELECTRICAL ADJUSTMENTS Note : 1. The transmitter section adjustments should be completed before performing the headphones section adjustment. 2. On adjusting the transmitter section, use the headphones as a jig. Transmitter Headphones TMR-RF450R MDR-RF430 MDR-RF450 Setting : Send Frequency Check and Adjustment 1. Set the noise filter SW to OFF. 2. Input a signal of 1kHz 40mVrms to only the L-ch (J403). 3. Connect a telescopic antenna to the frequency counter input and extend the antenna to a length of approximately 13cm. 4. Place TX board close to the frequency counter, then measur
Sony TMR-RF450R, – 4 – Connection points : Adjustment Location : S402 Channel Select Switch RV403 (R-CH) RV402 (L-CH) S401 Noise Filter ON/OFF Switch J402 (R-CH) RV404 : Main Carrier Modulation Adjustment RV401 : Sub-Carrier (L– R) Modulation Adjustment RV405 : Sub-Carrier Frequency Adjustment Send Frequency Adjustment J403 (L-CH) [TX BOARD] (Component side) [ TX BOARD ] (Conductor side) digital voltmeter (AC range) frequency counte r oscilloscope
– 7 – SECTION 4 EXPLODED VIEW NOTE : • -XX, -X mean standardized parts, so they may have some difference from the original one. • Items marked “ * ”are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. • The mechanical parts with no reference number in the exploded views are not supplied. Re
Sony TMR-RF450R, – 8 – NOTE : • Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. • -XX, -X mean standardized parts, so they may have some difference from the original one. • RESISTORS All resistors are in ohms METAL : Metal-film resistor METAL OXIDE :Metal oxide-film resistor F : nonflammable • Items marked “ * ”are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. • SEMICONDUCTORS In each case, u : µ , for example : uA.... : µ A.... , uPA.... : µ PA.... uPB.... : µ PB.... , uPC.... : µ
Sony TMR-RF450R, – 11 – Q404 8-729-045-00 TRANSISTOR SBX1639-02 Q405 8-729-045-02 TRANSISTOR KTC3200GR-AT Q406 8-729-045-00 TRANSISTOR SBX1639-02 Q407 8-729-045-02 TRANSISTOR KTC3200GR-AT Q408 8-729-045-02 TRANSISTOR KTC3200GR-AT Q409 8-729-045-02 TRANSISTOR KTC3200GR-AT < RESISTOR > R401 1-216-085-00 METAL CHIP 33K 5% 1/10W R402 1-216-304-11 METAL CHIP 3.3 5% 1/10W R403 1-216-025-91 RES,CHIP 100 5% 1/10W R404 1-216-085-00 METAL CHIP 33K 5% 1/10W R405 1-216-025-91 RES,CHIP 100 5% 1/10W R406 1-216-085-00 METAL CHIP 33K 5% 1/10W R407 1-216-049-91 RES,CHIP 1K 5% 1/1
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