|
|
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
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.
;
Excellent printing quality.
A complete and very usefull service manual with all details.
GREAT SERVICE AT VERY LOW PRICE!
A+++++++++++++++++++++++++
 ;
manual excelente completo , diagramas y esquemas bien presentados y buena calidad de imagen.
;
muy buen manual completo de buena calidad de impresion preciso y detallado , muy útil para la reparación.
;
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.
AV-25LS AV-25LX
5DIFFERENCE CONVERGENCE ADJUSTMENTS (Page 35)
STATIC CONVERGENCE ADJUSTMENT
(Same as AV-24LS and AV-25LX.) 1. Input a crosshatch signal. 2. Using 4-pole convergence magnets, overlap the red and blue lines in the centre of the screen (Fig. 4) and turn them to magenta (red/blue). 3. Using 6-pole convergence magnets, overlap the magenta(red/blue) and green lines in the centre of the screen and turn them to white.
(FRONT VIEW) (FRONT VIEW)
Fig. 4
4. Repeat 2 and 3 above, and make best convergence.
TOP
DYNAMIC CONVERGENCE ADJUSTMENT
(Procedure is changed from AV-25LS and AV-25LX.) 1. Move the deflection yoke up and down to adjust the pin cushion distortion in the screen top and bottom. (Fig. 5) 2. Move the deflection yoke left to right to overlap the lines in the periphery, and match the Yv. (Fig. 6) 3. Using the VR on the deflection yoke, match the YH (CROSS). (Fig. 7 and 9) 4. Repeat the steps 1 and 3 and obtain an optimum convergence. 5. Differential coil ADJUSTMENT. In case where the horizontal lines of red and blue around the centre of both sides of the picture as shown in Fig. 8, adjust the XV difference by using the differential coil on the top of the deflection yoke (Fig. 9) so as to minimize the XV difference.
YV Fig. 6 (FRONT VIEW) RED YH GREEN BLUE BLUE GREEN RED (FRONT VIEW) RED GREEN BLUE YV BLUE GREEN RED RED GREEN BLUE BOTTOM Fig. 5
� After adjustment, fix the wedge at the original position.
Fasten the retainer screw of the deflection yoke. Fix the PC magnet with glue.
BLUE
RED GREEN BLUE BLUE GREEN YH RED
VR
GREEN RED
FRONT XV coil
Fig. 7 (FRONT VIEW)
Fig. 9
Xv
GREEN
Fig. 8
2
No. 51848C
|
|
|
> |
|
