Philips L04L Service Manual page 75

Enter the Service Alignment Mode (see also chapter 5 "Service
Modes, ...."). The SAM menu will now appear on the screen.
Select one of the following alignments:
•
Options
•
Tuner
•
White Tone
•
Geometry
•
Audio
8.3.1
Options
Options are used to control the presence/absence of certain
features and hardware.
How to change an Option Byte
An Option Byte represents a number of different options.
Changing these bytes directly, makes it possible to set all
options very fast. All options are controlled via seven option
bytes. Select the option byte (OP1.. OP7) with the MENU UP/
DOWN keys, and enter the new value.
Leaving the OPTION submenu saves the changes in the
Option Byte settings. Some changes will only take effect after
the set has been switched "off" and "on" with the AC power
switch (cold start).
How to calculate the value of an Option Byte
•
Calculate an Option Byte value (OP1 .. OP7) in the
following way:
•
Check the status of the single option bits (OB): are they
enabled (1) or disabled (0).
•
When an option bit is enabled (1) it represents a certain
value (see column "Bit value" in table below). When an
option bit is disabled, its value is 0.
•
The total value of an Option Byte (decimal) is formed by the
sum of its eight option bits. The factory values are printed
on a sticker on the CRT (depends on region).
Table 8-1 Option Byte calculation
Bit (value) OP1 OP2
0 (1) OB10 OB20 OB30 OB40 OB50 OB60 OB70
1 (2) OB11 OB21 OB31 OB41 OB51 OB61 OB71
2 (4) OB12 OB22 OB32 OB42 OB52 OB62 OB72
3 (8) OB13 OB23 OB33 OB43 OB53 OB63 OB73
4 (16) OB14 OB24 OB34 OB44 OB54 OB64 OB74
5 (32) OB15 OB25 OB35 OB45 OB55 OB65 OB75
6 (64) OB16 OB26 OB36 OB46 OB56 OB66 OB76
7 (128) OB17 OB27 OB37 OB47 OB57 OB67 OB77
Total: Sum Sum
Option Bit Assignment
Following are the option bit assignments for all software
clusters.
OP3 OP4 OP5 OP6 OP7
Sum Sum Sum Sum Sum
Alignments L04L AA 8. EN 75