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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.
TUNER SECTION [AM] BAND switch : AM
NOTE: The adjustment should be performed setting the area indication to �Eur�. (Refer to �Receiving Stations Outside Your Country� on page 3.) After the adjustment, reset the area indication as it was. AM RF SSG Put the lead-wire antenna close to the set. 30% amplitude modulation by 400Hz signal output level : as low as possible AM VT VOLTAGE ADJUSTMENT Adjust for following values on digital voltmeter. Display indication Digital voltmeter reading Adjustment part AM531 kHz 1.5V T1
AM VT VOLTAGE ADJSTMENT BAND switch : AM digital
voltmeter TP22 (VT)
+ �
[FM] BAND switch : FM
FM RF SSG 0.01µF 22.5kHz frequency deviation by 400Hz signal. output level : as low as possible
[FM VCO Adjustment] Procedure :
FM RF SSG 0.01µF Carrier frequency : 98MHz Modulation : no modulation to ANT (TP1) VTVM 32 output level : 0.1V (100dB) to ANT (TP1)
set PHONES
1. Connect frequency counter to the positions shown below. 2. Tune the to 98 MHz. 3. Adjust RV1 for 19 kHz ± 100Hz reading on the frequency counter.
frequency counter TP23 (IC2 Pin !�) 1µF 100k (IC2 Pin 9)
� Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.
AM IF ADJUSTMENT Adjust for a maximum reading on VTVM. T2 450 kHz
�
Adjustment Parts Location
AM TRACKING ADJUSTMENT Adjust for a maximum reading on VTVM. L5 CT1 FM IF ADJUSTMENT Adjust for a maximum reading on VTVM. L3 10.7 MHz 621 kHz 1,395 kHz
[TUNER BOARD] � Component side �
T2 : AM IF T1 : AM VT TP23 TP22 L5 : AM TRACKING
TP1
RV1 : VCO
L3 : FM IF CT1 : AM TRACKING
�9�
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