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Top quality manual. Covers all aspects you'd expect in a top quality service manual for this Panasonic VHS VCR. The manual resolution is high. Another top quality manual from the only site worth downloading manuals from! If you're looking for a manual for the PV-9662 VHS VCR, this is the one you'll want to get!
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complete part-lists and pcb layout, schematic diagram is good enlargable,
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Excellent, fast delivery, excellent product. Good luck!
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This manual is for the usa model only. But it is clear
, accurate and comprehensive, including board layouts and schematics.
I found it extremely useful for my mitsubishi dp-86da, but the same diagram would also work for the realistic lab5000 and hi fi 80. Thanks.
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Great to have extra resources for Service Manuals, Now days you can really not trouble shoot efficiently without one , Wayne at IRIONS TV & ELECTRONICS REPAIR Clearwater , Fl. 33755 727-446-7955
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
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