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There are currently no product reviews.
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thank u so much for this manual that was so cheap that i thought it was a scam but i gambled anyway because it was too good of a deal to pass up and behold,the manual has everything and details of everything even the screws and im still amazed and very happy with my manual .so take my word and jump on it before they realize how cheap they selling thier manuals..thank you so much for taking time to read my thoughts
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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.
7
Does pulse of L = 1.65V and H = 3.3V develop at pin 131 and L = 0V and H = 1.65V develop at pin 132 of IC401? Y Y Check signal process system following to IC402. Does RF output higher than 1 V(p-p) develop at pin 30 (TP502) of IC502? Y N
Disc playback is NG (DVD).
N
Is PLL locked? (Refer to waveforms.)
N
Check peripheral circuits of IC401 and IC306.
Check IC502. Lens cleaning.
N
Pin 43 of IC502 = 2.4V Pin 44 of IC502 = 3.0V
Pickup mechanism replacement
Y Check peripheral circuits of IC401 and IC306. Check peripheral circuits of IC502 and IC401.
Fig. 1-3-16
PLL works as a servo loop to generate a clock signal for reading RF signal binary data. With the PLL locked, the eye pattern is identified clearly when triggered with the read clock PLCK.
DVD RF signal
DVD playback waveform
DVD RF signal Pin 30 (TP502) of IC502
DVD RF signal Pin 30 (TP502) of IC502
V : 500 mV/div H : 50 ns/div
DVD PLCK Pin 117 (TP409) of IC401
Fig. 1-3-17
CH1 : TP502 DVDRF 500 mV/div CH2 : TP409 DVDPLCK 5 V/div 50 ns/div
Fig. 1-3-19
CD RF signal
CD playback waveform
CD RF signal Pin 30 (TP502) of IC502
CD RF signal Pin 30 (TP502) of IC502
V : 500 mV/div H : 100 ns/div
CD PLCK Pin 117 (TP409) of IC401 CH1 : TP502 CDRF 500 mV/div CH2 : TP409 CDPLCK 5 V/div 100 ns/div
Fig. 1-3-18
Fig. 1-3-20
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