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Ottima qualità grafica e completo nelle notizie. Costo abbastanza contenuto.
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Great and quick support. The maual was exactly what I was looking for and my problem
solved. Many thanks.
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Very good service Within one day i received a pdf of the users manual and electric circuits so I was able to measure the different voltages in the printed circuit and find out the fault Payment was also reliable and easy.Without the manual i could not have repaired.So thanks to "Search for a manual"
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you are doing great job guys.....my father ask me to find out the schematics of Sony KV25R1D to sort out the problem ..(he was electrical technician, and excperianced with TV and simillar stuff). finally he found the cause and change all necessary parts....now he has got working old dog..and is very happy!!... thank you all.. NB..he also saved the repair cost.
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Perfect. Received my manual within 24 hours. Clear scan of the manual I needed. No problem.
KRC-13R,178R,23R,278R,280R
COMPONENT DESCRIPTION
SYNTHESIZER UNIT (X14-613x-xx)
REF. No.
IC1 IC2 IC3 IC4 IC5 IC6 IC7 Q49 Q50 Q51,52 Q53 Q54,55 Q56,57 Q58,59 Q60,61 Q150 Q151 Q153 Q201 Q203 Q260 Q261 Q301 Q320 Q350 Q351 Q352 Q353
FUNCTION
SYSTEM µ-COM ELECTRIC VOLUME MUTE POWER IC EQUALIZER AMPLIFIER RESET RDS DECODER ACC DETECTION SW BACK-UP DETECTION SW BACK-UP 5V DRIVER P.ON 5V SW 8V SW 8V DRIVER ILLUMINATION +B SW ILLUMINATION +B DRIVER ELECTRIC VOLUME MUTE SW SVR FORCED DISCHARGE SW PRE OUT MUTE SW FM +B SW AM +B SW MOTOR +B SW MOTOR +B DRIVER CHANGER RESET SW PANEL 5V SW P-CON. DRIVER P-CON. PROTECTION SW P-CON. PROTECTION INHIBIT SW P-CON. SW
OPERATION
Controls system. Controls sound volume. Selects each source. Controls each mute output. Amplifies power so that the speaker can drive audio signal. Equalizer amplifier for cassette tape sound. Resets power supply. Decodes RDS signal. Works when ACC operation stops. Works when the back-up voltage comes less than 9.2V. Works when the back-up works. Works when the power comes. Works when the power comes. Works when the power comes. Works when the power comes. Works when the power comes. Works when the back-up voltage detection or the changer mute or µ-com mute works. Works when the amplifier mute works. Works when the back-up voltage detection or the changer mute or µ-com mute works. Works when FM mode is being selected. Works when AM mode is being selected. Works when TAPE mode is being selected. Works when Q260 works. Works when power supply is being reset and IC6 works. Works when the back-up works and panel is on the unit. Stops during POWER OFF and ALL OFF modes. Works when P-CON is being short-circuited on GND. Inhibits protection SW function when P-CON works momentary. Stops during POWER OFF and ALL OFF modes. Works when the back-up voltage detection or the changer mute or µ-com mute works. For RDS decorder (IC7). Works when receiving FM signal. Stops when seeking FM signal. For noise level detection.
Q450,451 PRE OUT MUTE SW Q500 AUDIO OUT BUFFER Q501,502 AFC TIME CONSTANT SW Q503 NOISE BUFFER
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