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Fint forløb med levering af manualen. Kvaliteten af skanningen betegnes som middel
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I found the manual to be clear concise and complete. It was of immense assistance when removing the unit as the unit was over 22 years old and the wiring diagram was unobtainable from the manufacturer. The exploded drawings were clear as were the instructions and labels.
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I will highly recommend this seller. They are honest, accurate, fast and responsible.
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This manual was very good & was very helpful with repairs.
Always great & fast service from Owner's manual.
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Very pleased with the quality of the scan. No complaints whatsoever.
HCD-EP515
SECTION 5 ELECTRICAL ADJUSTMENTS
CD SECTION
Note: 1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given. 2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated. 3. Use an oscilloscope with more than 10M� impedance. 4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.
RFDC signal waveform
VOLT/DIV: 200 mV TIME/DIV: 500 ns
level: 1.15 ± 0.35 Vp-p
S-curve Check Connection:
oscilloscope CD board TP (FE) TP (DVC)
+ �
Checking Location: CD board (Conductor side) RFAC Level Check Connection:
oscilloscope CD board
Procedure: 1. Connect an oscilloscope to test point TP (FE) and TP (DVC) on the CD board. 2. Turn the power on. 3. Put the disc (YEDS-18) in and turned power switch on again and actuate the focus search. (actuate the focus search when 4. disc table is moving in and out) Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 2 ± 1 Vp-p.
S-curve waveform
TP (RFAC) TP (VC)
+ �
Procedure: 1. Connect an oscilloscope to test point TP (RFAC) and TP (VC) on the CD board. 2. Turn the power on. 3. Put the disc (YEDS-18) in to playback the number five track. 4. Confirm that oscilloscope waveform is clear and check RFAC signal level is correct or not.
Note: A clear RFAC signal waveform means that the shape ��� can be clearly distinguished at the center of the waveform.
symmetry
RFAC signal waveform
A within 2 ± 1 Vp-p B
VOLT/DIV: 200 mV TIME/DIV: 500 ns
level: 1.35 ± 0.4 Vp-p
Note: � Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7. � Take sweep time as long as possible and light up the brightness to obtain best waveform.
Checking Location: CD board (Conductor side) RFDC Level Check Connection:
oscilloscope CD board TP (RFDC) TP (DVC)
+ �
Checking Location: CD board (Conductor side) (See page 14)
Procedure: 1. Connect an oscilloscope to test point TP (RFDC) and TP (DVC) on the CD board. 2. Turn the power on. 3. Put the disc (YEDS-18) in to playback the number five track. 4. Confirm that oscilloscope waveform is clear and check RFDC signal level is correct or not.
Note: A clear RFDC signal waveform means that the shape ��� can be clearly distinguished at the center of the waveform.
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