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It´s very very nice manual with all, what i need. Original in good quality. Very fast business. Very much thanks...
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Purchased the manual that I was looking for at a great price and could download it easily.. Great service experience and for future purchases I plan to use the site.
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A site where discontinualed schematic diagrams and back dated information can be found on discontinued radios tv's and any electronic equipment can be found. Newer manuals either Service and operating manuals. Radio amateurs should find this site a great source for ham radio equipment manuals. I will return to this site should I need information on any electrical equipment. priced easy to download in a PDF format and print pages need to undertake the repair.
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Quality scan of the original. All the detail necessary to troubleshoot, repair and adjust the unit. I'm sure I will be downloading more manuals in the future as the need arises.
KRC-33R,378R/RY,480R
CIRCUIT DESCRIPTION
(X14-) IC1 :
PORT No. 41 42-44 45 46 47
-COM
I/O O O O O O O I O O O O O I I I I I I I I I I I I I I FUNCTION Noise detection time constant switch. Mute signal output to the power IC (IC4). SVR signal output to the power IC (IC4). Stand-by signal output to the power IC (IC4). Control signal output to P-CON or P-ANT. Buzzer signal output. ACC detection signal input. Back-up voltage detection signal input. Request signal output to the changer. Changer control. SW 5V power control signal output. P.ON power supply control signal output. System reset signal input. Data input from the remote controller. Data clock input from RDS decoder . Request input signal from the changer. Insertion detection signal input from cassette mechanism. Key request. Tape-end detection signal input from cassette mechanis. GND. Power supply. For main system clock oscillation. For main system clock oscillation. For flash memory writing. Power supply. Power supply. 5V power supply (For A/D converter reference voltage). S-meter voltage input from the front-end. Tape mode input from cassette mechanism. Phone (Tel-mute) voltage input. Voltage input from E-volume (IC2)�s noise amplifier. Destination switching.
OPERATING CONDITION
PORT NAME AFC N.C. P-MUTE
SVR
"L" : FM seeking. "H" : The other condition. "L" : Power IC (IC4) mute. "L" when P.ON goes down. "H" : Power IC (IC4) "ON". "L" : Power IC (IC4) "OFF". "H" : P-CON signal output "ON". "L" : P-CON signal output "OFF". Beep sound output. "H" : ACC "OFF". "L" : ACC "ON". "H" when back-up signal does not exist. "L" when back-up signal exists. "L" : Request. "H" : Changer mode. "L" : The other mode. "L" : SW 5V "ON". "H" : Power "ON". "L" : Reset. "H" : Pack in. Active "L". "H" : Tape running. "H" : SD signal exists. "L" : SD signal does not exist. Vth : Fit the new front-end. Vth : 2.5V. Tel mute : More than 1V. Navi mute : Less than 2.5V. "H" : KRC-478RV/RYV. "L" : The other models. "L" : Tape-end. "L" : Pack out. "H" : The other condition. "L" : Power "OFF".
STBY P-CON N.C. BEEP ACC-DET BU-DET CH-REQ H CH-CON N.C. SW5 P.ON RESET REMOTE R-CLK CH-REQ C PACK IN KEY-REQ T-END VSS 0 VDD 1 X2 X1 IC/TEST XT2 VDD 0 VDD 0 AV REF 0 S-METER T-MODE PHONE NOISE TYPE 0
48 49 50 51 52 53 54 55 56 57 58,59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80
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