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First of all I must say that I received the manual in just a few minutes after placing the order. The copy is well done and very readable. I will buy others soon... Thanks, Meyer
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Good service manual. I gat all I want. Copy is good, but could be better. All clear and useful. I sincerely recommend.
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The schematic is very helpful and the images are very good.The schematic is very helpful and the images are very good.The schematic is very helpful and the images are very good.The schematic is very helpful and the images are very good.The schematic is very helpful and the images are very good.The schematic is very helpful and the images are very good.
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Welcome. The scheme is clearly helped me to repair. Worth to download it.
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Excellent manual, very clear, technical specification provided, useful information regarding adjustment and set up.
HCD-HP7
CD SECTION
Note: 1. CD Block is basically constructed to operate without adjustment. 2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated. 3. Use an oscilloscope with more than 10 M� 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. 5. Check the focus bias check when optical block is replaced. Focus Bias Check
oscilloscope (DC range) BD board TP (RF) TP (VC)
+ �
s
Checking Location: � BD BOARD (Conductor Side) �
14
1
IC722
15 28
CN710 TP(RF)
1 80 61
60
Procedure : 1. Connect oscilloscope to TP (RF) and TP (VC) on the BD board. 2. 3. 4. Press the ?/1 button to turn the power on. Put disc (YEDS-18) in and press the N (CD) button to playback. Confirm that oscilloscope waveform is as shown in the figure below. (eye pattern) A good eye pattern means that the diamond shape ( ) in the center of the waveform can be clearly distinguished.
VOLT/DIV: 200 mV TIME/DIV: 500 ns
TP(VC)
20 21
IC721
40 41
IC803
level: 1.0 ± 0.2 Vp-p
25
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