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The item received was as described, as expected. I was pleased with the order. Thank you.
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Superb rendition. Drawings (schematics) complete and unabridged. I do a great deal of vintage audio restoration. Documentation is essential for successful repairs. I have found sources over the years that offer good documentation, but rarely all that is necessary. Owner's Manuals has filled that void with complete and legible documentation. They have narrowed my "favorites" to a more manageable collection. This Denon manual in particular contained the latest revisions level, and offered alterations favorable to updating the item. The Illustrated Parts Breakdown (IPB) was well enough detailed to simplify part symbols and physical locations. You will not be disappointed!
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Clear and concise. Saved me a lot of time and money.
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Superb manual. Exactly what I ordered and made available in a very timely manner.
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very fast detailed and accurate hope to do business again
SECTION 5 ELECTRICAL ADJUSTMENTS
Notes: 1. CD block basically constructed to operate without adjustment. Therefore, check each item in order given. 2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise indicated. 3. Use the oscilloscope with more than 10 M� impedance. 4. Clean an object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks. S-Curve Check Connection:
BD board TP2 (FE) TP (VC)
+ �
RF signal waveform VOLT/DIV: 200 mV TIME/DIV: 500 ns (with the 10: 1 probe in use) level: 1.2 +0.25 Vp-p �0.20
FOCUS/TRACKING GAIN ADJUSTMENT VR in optical block is not adjusted. As this gain has a margin, normally a little shift of gain will not cause a problem. If you happened to move VR and you are not sure the original position, set it to the mechanical center. Adjustment Location: [BD BOARD] � Side B �
CN103
oscilloscope
When observing the eye pattern, set the oscilloscope for AC range and raise vertical sensitivity. E-F Balance (Traverse) Check Connection:
oscilloscope (DC range)
CN102 TP4 (TE) TP2 (FE) TP (VC)
CN105 TP5 (TEI) TP1 (RFO)
Procedure: 1. Connect the oscilloscope to TP2 (FE) and TP (VC) on BD board. 2. Connect the TP3 (FEI: IC101 pin @ª) and TP (VC) with lead wire. 3. Turned power switch on. 4. Put disc (YEDS-18) in and turned power switch on again and actuate the focus search. (actuate the focus search when disc table is moving in and out.) 5. Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 3.0 ± 1.0 Vp-p.
S-curve waveform
BD board TP4 (TE) TP (VC)
+ �
IC102
IC351
TP13 (XPLCK)
Procedure: 1. Connect the TP18 (ADJ) to ground and TP5 (TEI: IC101 pin @¶) to TP (VC)with lead wire. 2. Connect the oscilloscope to TP4 (TE) and TP (VC) on BD board. 3. Turned power switch on. 4. Put disc (YEDS-18) in and press the ( button. 5. Confirm that the oscilloscope waveform is symmetrical on the top and bottom in relation to A Vdc, and check this level.
Traverse waveform
IC361 TP18 (ADJ)
symmetry
A
within 3.0 ± 1.0 Vp-p
A B Symmetry
B
6. After check, remove the lead wire connected in step 2. Note: � Try to measure several times to make sure that 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. RF Level Check Connection:
oscilloscope (AC range) BD board TP1 (RFO) TP (VC)
+ �
A/B � 100 is ± 20 % or less.
level: 1.3 ± 0.7 Vp-p
6. After check, remove the lead wire connected in step 1. RF PLL Free-run Frequency Check Connection:
frequency counter + �
BD board TP13 (XPLCK)
Procedure: 1. Connect the oscilloscope to TP1 (RFO) and TP (VC) on BD board. 2. Turned power switch on. (stop mode) 3. Put disc (YEDS-18) in and press the ( button. 4. Confirm that the oscilloscope waveform is clear and check RF signal level is correct or not. Note: Clear RF signal waveform means that the shape ��� can be clearly distinguished at the center of the waveform.
Procedure: 1. Connect the frequency counter to TP13 (XPLCK). 2. Turned power switch on. 3. Put disc (YEDS-18) in and press the ( button. 4. Confirm that the reading on frequency counter is 4.3218 MHz.
� 13 �
� 14 �
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