Philips PM2519 - 9.2. MODIFICATIONS TO THE PM 2519;51

9-3
9.2. MODIFICATIONS TO THE PM 2519/51
This service manual, also for the PM2519/51, is based on the instruments numbers DY 5101236 and onwards.
For instruments with a lower number the following modifications are given.
For instruments with a lower number than DY 51672 the IEC p.c.b. is supplied with a piggy-back processor.
This is a MAB8440 with a 4K ROM on the back (see Fig. 9.3.). For the circuit diagram refer to Fig. 7.18,
R611 IS SUPERFLUOUS.
OCCASIONALLY IT 1S
MOUNTED.
24 PINS
Loz”
1jo 0 0 0 of 5:
x602
PIGGY BACK PROCESSOR tere
Fig. 9.3.