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There are currently no product reviews.
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I do not have very much to say.
The price is quite covenient, delivery was better as promised (about 12 ours, against the specified 24 hours if I remember well), and the quality of the PDF is more than acceptable.
The Service Manual of Sansui R30 itself is also satisfactory: good graphic for schematics and layouts, simple and well structured.
Giovanni Bianchi
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Happy to find finally a schematic for this amplifier. The schematic is of good quality, the pcb layout is useless: all is black. Never the less, it is very easy to find the components on the board using the schematics.
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Hard to find manual was ready the next day. Scans were very legible (including schematics). All the essential parts of the service manual were present (adjustment procedure, schematics, and parts list). It would have been nice if the rest of the manual was included (disassembly procedure, theory of operation, etc.).
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The Service Manual for the Kenwood KR-V55R provided by owner-manuals.com was as described/advertised. The contents provided the necessary information to effect a diagnosis of the unit. The schematics above all else was instrumental in tracing the the signal flow from component to component.
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This manual was the factory original. Excellent value and contained all the details I needed. Easy dowwnload provided the information when I needed it.
pin 51: BUC 2 pin 52: BUC 3 pin 53: BUC CLOCK pin 54: CCE pin 55: CD RESET pin 56: S STOP pin 57: CHU SW pin 58: TR A pin 59: TR B pin 60: VDD pin 61: LD CNT pin 62: GND pin 63: PLL CE pin 64: PLL CLK pin 65: PLL DO pin 66: PLL DI pin 67: ST/TWEET pin 68: NDS/IMB pin 69: MECH MUTE pin 70: RDS DATA pin 71: RDS CLK pin 73: TAPE IN pin 74: MODE BIT 1 pin 75: MODE BIT 2 pin 76: MODE BIT 3 pin 77: REEL PULSE pin 78: APC SENSE
:I/O: CD IC Data input / output. :I/O: CD IC Data input / output. : O : CD IC clock pulse output. : O : Chip enable signal output to CD IC. : O : Reset signal output to the CD IC. : IN : In side limit signal input. : IN : CD disc chucking signal input. : IN : The signal input from the CD mechanism. : IN : The signal input from the CD mechanism. : - : Positive supply voltage. :I/O: The loading control. : - : Ground. : O : Chip enable signal output to the PLL IC. : O : Clock pulse output to the PLL IC. : O : Serial data output to the PLL IC. : IN : Serial data input from the PLL IC. :I/O: Outputs "L" at AM 900kHz receiving. Inputs "L" at FM stereo receiving. : O : "H"= NDS, "L"= IMB. : O : Mechanism Mute signal output. : IN : RDS serial data input. : IN : Clock pulse input from RDS decoder. : IN : Tape loading start signal input. : IN : Mode switch signal input from the mechanism. : IN : Mode switch signal input from the mechanism. : IN : Mode switch signal input from the mechanism. : IN : Reel pulse input. : O : Sensitivity selection signal output to the APC circuit. "H"= play.
pin 79: APC DET pin 80: PWR MTR 1 pin 81: PWR MTR 2 pin 82: MAIN MTR pin 83: DOLBY pin 84: FWD / REV_
: IN : APC detection signal input. : O : Power motor control signal output. : O : Power motor control signal output. : O : The main mortor control signal output. : O : DOLBY ON signal output. : O : "H"= Forward, "L"= Reverse.
pin 85: VOL1/LD MUTE : IN : The volume pulse input, or the LD MUTE input. pin 86: VOL2/CD CON : IN : The volume pulse input, or the short check flag input for the cable to CD. pin 87: 6 CD LOAD : IN : The load signal input. pin 88: TAPE EJECT pin 89: EJECT pin 90: Tel/Radio pin 91: ILL DC pin 92: REMOCON A pin 93: REMOCON B pin 94: A VSS pin 95: S METER pin 96: Vref pin 97: A VCC pin 98: POWER SW : IN : The tape eject signal input. : IN : Eject key input. : O : The input selection signal output for the electric volume. : IN : VFD-brightness control signal input. : IN : The input terminal of the internal ADC for the handle remote controller. : IN : The input terminal of the internal ADC for the handle remote controller. : - : Analog ground. : IN : The input terminal of Internal A/D converter to detect the Voltage of FM S meter. : - : Reference voltage : - : Positive supply voltage for the internal analog section. : IN : Power Key input(alternative).
pin 72: SPEED PULSE : IN : The speed pulse input.
pin 99: DISP CE2/RST : O : The chip enable signal-2 output to the VFD driver, or the reset signal output to the LCD driver. pin100: DISP CE1/CE : O : The chip enable signal-1 output to the VFD driver, or the chip enable signal output to the LCD driver.
ADJUSTMENTS
Radio section
Item FM Diversity FM noise convergence Procedure 1. Input the 98.1MHz/20dB(1kHz,30% MOD) signal. 2. Connect a digital tester to TP101 and adjust VR101 so that the reading of digital tester is 0.6+0.1/-0.1V. 1. Input the 98.1MHz/55dBu(1kHz 30% MOD) signal. (VOL 1.4V=0dB) 2. Adjust the outputs to -18+1/-1dB by VR102 when the SG output is set to -20dBu.
Measuring instrument
SSG Digital tester SSG AC volt meter
Tape section
Item Dolby level Procedure 1. Playback a Dolby level test tape(400Hz,200nWb/m) and connect the Milli-volt meter to TP201(L)/TP202(R). 2. Adjust VR1(L)/VR2(R) to obtain an output of TP201(L)/TP202(R) is 300mV+1/-1dB. (Dolby SW:off) 1. Playback a Wow & flutter test tape(3kHz,-10VU) and connect the frequency counter to TP201(L) or TP202(R). 2. Adjust Speed VR of the motor to obtain an output of TP201(L),TP202(R) is from 2970Hz to 3090Hz.
Measuring instrument
Dolby test tape Milli-volt meter
Tape speed
Wow & flutter test tape Frequency counter
-3-
PN-1741D, N
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