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Another excellent buy! A fully readable PDF archive. Good prints!!
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It is wonderful done!!! a great job in scanning the manual. Superior quality in all the electric scheme. Very understandable and net!!! Thank you!
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muy buen manual por lo completo de este algunos esquemas estan muy divididos lo que hace algo dificil el seguimiento.
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very good manual, with detail and clarity in esquematic diagrams and waveforms .
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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.
No 43
Name PHI-1 FILTER
Description The loopfilter connected to pin 43 is suitable for various signal conditions as strong/weak and VCR signal. This is achieved by switching of the loopfilter time constant by changing the PHI-1 output current. Via I2C bus FOA/B, different time constants can be chosen, including an automatic mode which gives optimal performance under varying conditions. To this pin are connected the IC-substrate and horizontal output. The EW drive is a current output. The output is single-ended and is fed directly to the EW-input terminal The vertical drive has a current output. The output is balanced which ensures a good common mode behavior with temperature and makes the output signal less sensitive for disturbances. The PLL frequency range is 32-60MHz with corresponding VCO frequency 64-120MHz. The IF input impedances is 2 in parallel with 3pF and matches the required load for commonly used SAW filters. A DC coupling is allowed, so no series capacitors between SAW filter and IF input are necessary. The input range for EHT tracking is 1.2 ~ 2.8V, for a compensation of +/- 5% on vertical and/or EW. The tracking on EW can be switched on/off by HCO. The overvoltage protection is activated when the voltage on pin 50 exceeds 3.9V typical. This pin requires a capacitor to ground of l00nF +/- 5%. The optimal sawtooth amplitude is 3.5V and is determined by the external capacitor and charge current. The sawtooth bottom-level is 2V. This pin requires a resistor to ground. The optimal reference current is 100 . which is determined by this resistor. The AGC capacitor value is 2.2 and has been defined for an optimal compromise between AGC speed and tilt for all AGC modes (negative/positive modulation). This output is used to control (reduce) the tuner gain for strong RF signals. The tuner AGC is an open collector output which is acting as a variable current source to ground. not used. This pin requires a capacitor of 10 connected to ground. The pin acts as a low pass filter needed for the DC feedback loop.
44 45 46 47 48 49
GROUND EAST-WEST DRIVE VERT DRIVE + VERT DRIVE IF INPUT
50
EHT/OVERVOLTAGE PROTECT INPUT
51
VERT SAWTOOTH CAPACITOR REFERENCE CURRENT INPUT AGC DECOUPLING CAPACITOR
52 53
54
TUNER AGC OUTPUT AUDIO DEEMPHASSIS DECOUPLING SOUND DEMODULATOR
55 56
20
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