Philips 22 ah 606 service manual

Page 2

Alignement 0 g Q :1
Rielacc SK... C) -" 2051 ril-j Y 7
2052 3051
452 kHz 5111
AM-IF MW 468 kHz Min' cap' 5121 @ Max + symm
AM-Fl 470 kHz 5120 = . .
(=10 5115) ( fo 5115)
(+1 kHz)
f0 5115 3 5111
5120 Q>
5121 Min. + symm.
AM-OSC LW 147 kHz ® Max cap 5123 ® or ®
(+1 kHz) max
MW 512 kHz
(+ 1 kHz) 5122
1635 kHz _
(+1 kHz) Min. cap 2197
AM-RF MW 600 kHz ® @ 5118 ® or
1+ 1 kHz) Max <>
LW 155 kHz
1+ 1 kHz) 5119
MW 1500 kHz
1+ 1 kHz) 2186
Min. cap. 5107 5112 <9 + <9
FM"F FM 5109
i 10.7 MHz 5113 Max. + symm.
A1 250 kHz
50 H" 5107
i107MHz 5113 <6) ®
13 I ©+ ®
< 20 mV 7

CS 65 814

Before proceeding to trimming, short-circuit
point 14 of IC 6111 by connecting it to the mass.

Switch off the AFC (automatic frequency control).
Interrupt solder bridge .

Adjust the RF. generator In such a wav that
a symmetrical response curve is obtained on
the screen (= f0 5110).

The input signal shall be as low as possible.
Adjust for max1mum linearity of the Scurve.
Close solder bridge

Adjust for zero-axis crossing (red LED shall
burn glaringly).

Mark at scale.
Meter deflection 2 8 divisions.

Eliminate short-circuit at point 14 of IC 6111.

Adjustment output amplifier

Direct current adjustment - Left (Right).

With theaid of R3527 (3523) adjust the quiescent
current through the output transistors to 50 mA 1 5 %.
To be measured with a non-earthed mV~n1eter connected
across the resistors 3505, 3507 (3506, 3508).

The deflection shall then be 24 mV i 5 %.

Inspection DC protection

- Connect a resistor of 270 k9 between the negative
pole of C2411 and point +1 of the power supply.
The relay shall then be released.

- Connect a resistor of 220 k9 between the negative
pole of C2414 and point -1 of the power supply.

The relay shall then be released.