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Good,readable manual. I found other manuals that were not readable when it came to part ID, but the one downloaded from owner-manual.com was better than expected. I will do buisness with owner-manual.com again.
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Service Manual that I received was very helpful to me. Thank you.
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The manual is well organized and is easy to read. The chapters are following normal way to proceed.
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This scanned manual is well done in that most all the pages except for one is straight and clear- the way I would do them. One page was upside down but that happens. For the money that is charged on this site you get a pretty good deal. Now with complex repairs, I still prefer to us paper manuals which I have to buy at stereomanuals but the one I got here was much less than the $45 he was charging but this is a larger than normal manual for three different units. I am a picky manual user because I have used original manuals from Sony and Teac.
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Very useful service manual, was exactly what i needed.Good quality,reasonable price.Thank you.
Circuit Descriptions
5-2 RF
5-2-1 RIC1 (KS1461)
KS1461 is combined with KS1452 and KS1453 as bipolar IC developed for DVD SERVO system. Main features include DVD waveform equalizing, CD waveform equalizing, focus error signal generation, 3-beam tracking error signal generation, DPD 1-beam tracking error, defect, envelope, MIRR output, etc. after receiving the pick-up output converted into I/V.
5-2-1 (a) Basic Potentiometer
KS1461 uses a single power method and each circuit is based on V of 2.5V. V (Pin 12, 20, 24, 67) terminal is needed for IC, which uses the peripheral V.
5-2-1(b) RF signal
Fig. 5-11 shows the flow of signal generated by the pick-up. A, B, C, D signals detected from pick-up are converted in to RF signal(A+B+C+D) via RF summing AMP.
104
RFAGCO 474 EQIN MIRRI ? . m A PICK-UP B C D PD LD F E 3 4 TE 5 6 7 8 ABCD SUM ENV FOK DEFECT FE w E ALPC Fig. 5-11 Fig. 5-12 shows the waveform-equalizing block diagram for the RF signal. It outputs to EQout (Pin 86) terminal by initially changing switching AMP gain of DVD and CD, and then adjusting the level in RF SUM & AGC. It controls RF SUM & AGC gain by means of Pin 89-95 and interfaces with PWM signal, (output from PWM terminal of KS1453, via low-pass filter to adjust boost gain and peak frequency. i I P [ F d T ABCDI
103 104 104 104 104
% ^ & * DPD TE RE SUM & AGC
MIRR RF EG TESEL Mhx
G MIRR , RFEQO
y TE
ABCD ENV FOKB DFCT2 DFCT1 FE
5-6
Samsung Electronics
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