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Very quality copy of original service manual, which contains the circuit diagrams, PCB and lists of components, well as recommendation for calibration procedures of device, also everything else, that need for repair, tuning and use this oscilloscope.
All presented copies have high-resolution, so you can view all in detail.
This manual will very useful for simple owners and for repairers.
I recommend these manual, because myself is owner of Philips PM3216 and I need sometimes servicing these oscilloscope (principally calibrating).
Also, these document is an example of excellent design of technical documentation.
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Excellent printing quality.
A complete and very usefull service manual with all details.
GREAT SERVICE AT VERY LOW PRICE!
A+++++++++++++++++++++++++
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manual excelente completo , diagramas y esquemas bien presentados y buena calidad de imagen.
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muy buen manual completo de buena calidad de impresion preciso y detallado , muy útil para la reparación.
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The service manual is a good quality scan of the Panasonic NV-850, which is electrically identical to the Philips VR 6920, but mecanically just nearly.
HCD-XGV50
CD SECTION
Note : 1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given. 2. Use LUV-P01 (4-999-032-01) 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. S-Curve Check
Oscilloscope BD board
Note: Clear RF signal waveform means that the shape ��� can be clearly distinguished at the center of the waveform.
VOLT/DIV : 200mV TIME/DIV : 500ns
level : 1.45 ± 0.3Vp-p
E-F Balance (1 Track jump) Check
oscilloscope BD board
TP(FE) TP(DVC)
TP(TE) TP(DVC)
Procedure : 1. Connect oscilloscope to TP (FE). 2. Connect between TP (FE) and TP (DVC ( 1.65 V)) by lead wire. 3. Press the \/1 button to turn the power ON. 4. Load a disc (LUV-P01) and actuate the focus search. (In consequence of open and close the disc tray, actuate the focus search) 5. Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 2 ±0.5 Vp-p.
S-curve waveform symmetry
Procedure: 1. Connect oscilloscope to TP (TE) and TP (DVC) board. 2. Press the \/1 button to turn the power ON. 3. Load a disc (LUV-P01) and playback the number nine track. 4. Press the bB button. (Becomes the 1track jump mode.) 5. Confirm that the level B and A (DC voltage) on the oscilloscope waveform.
center of waveform B 0V A (DC voltage)
A within 4 ±1Vp-p B
B=1.3 ± 0.6Vp-p
Specified level: A � 100=less than � 22% B
symmetry
6. After check, remove the lead wire connected in step 2. 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. RF Level Check
oscilloscope BD board TP(RFDC) TP(RFAC)
Checking Location: [BD BOARD] (SIDE B)
DVC
SE
FE
Procedure : 1. Connect oscilloscope to TP (RFDC) and TP (RFAC). 2. Press the \/1 button to turn the power ON. 3. Load a disc (LUV-P01) and playback. 4. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.
TE RFDC RFAC DVC
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