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This comprehesive service maual was greatly appreciated, as was the digital download.
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Good en helpfull black and white scanned Srfvice manual of the Philps D8444. Quick service and delivery
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Scan was really good quality, easy to read, download easy
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very good manual as always. easy to read, detailed and includes schematic
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I'm very satisfied with your manual service. Your website made it easy to locate the correct manual. Also the quality is great and I never had a problem reading the fine details.
Thanks again.
Jeff Miller
JM Electronics
<CD SECTION>
PWB CD
6
VC R546
1
RIOP
SFR501 FE TE
4
IC501
RF
2 3
IC651
CD Adjustment Method �Perform the adjustments after the machine enters the test mode. �Place the CD mechanism on level ground. �Equipment and tools required Measuring equipment: Oscilloscope (Use the probe of 10:1) Digital Multimeter (Use it in the DC Volt range) Jitter meter (Kikusui 6235) Test Disc: TCD-782 ATD-001 1. Focus Offset Adjustment 1) Connect a digital multimeter to the test point (FE), (VC). 2) Play back the 2nd track of TCD-782. 3) Adjust SFR501 until the digital multimeter indicates 0 ± 10 mV. 2. RF Waveform Check 1) Connect an oscilloscope to test point (RF), (VC). 2) Play back the 2nd track of TCD-782. 3) Check that the RF waveform has the maximum amplitude and the center of the wedge waveform has the clear blank.
RF OSCILLOSCOPE
Approx.
DIGITAL MULTIMETER V FE VC
OUTPUT
1.8 ± 0.3 Vp-p EYE PATTERN must be CLEAR and MAX 0V VOLT / DIV: 500mV
3. Jitter Check 1) While an oscilloscope is kept connected in the same test point as in step 2. RF Waveform Check, connect the output terminal of an oscilloscope to the input terminal of the jitter meter. 2) Set the VOLT range selector of an oscilloscope to 500 mV range or lower. 3) Play back the 2nd track of TCD-782. 4) Check that the jitter meter indicates 28.0 ns or less.
VC
OSCILLOSCOPE JITTER METER OUTPUT INPUT ns
RF VC
� 38 �
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