Grundig GV 900 SV/1 Manuel De Service page 30

Adjustment Procedures
2. VCR Option Code
Dependent on the construction of the video recorder, the correspond-
ing software stored in the mask-programmed µC is activated with the
VCR Option Code. The option code is stored in EEPROM IC705.
Service note
On replacement of EEPROM IC705 this µC is to be programmed
specific to the machine.
Entering the option code
– Switch the VCR off (Standby).
– Bridge the test points P802 on the chassis board shortly. All
segments will appear on the display.
– Use the buttons C / D to select the function numbers JP 0 to JP39
and the level settings SP P to EP n.
– Activate or deactivate the function numbers JP 0 to JP39 accord-
ing to the Option Code Table with button G or "CLEAR" respec-
tively. On activating the function, the function number starts
flashing and it is illuminated on deactivating the function.
– Select the level settings SP P to EP n with buttons 0...7 according
to the Option Code Table.
Attention: All the machine's functions work correctly only on enter-
ing the correct option code.
– To store and terminate the entered option code, bridge the test
points P802 on the chassis board shortly. All segments will appear
on the display.
Checking the settings
For checking the settings the function numbers (JP 0...JP39) are
combined to 10 blocks of 4 binary digits each and are displayed as a
hexadecimal number. When pressing the remote control button Ì the
7 least significant blocks of this number are displayed.
Example GV 900 SV/1:
0 0 1 1 0 1 1 0 0 0 0 1 1 0 0 1
= = =
3 6 1
When pressing the remote control button ı the 3 digits on the right
indicate the most significant 3 blocks in hexadecimal form. Addition-
ally, the luminance and chrominance settings in Standard Play mode
included in the software will be displayed.
Example GV 900 SV/1:
P 5 6
SP
PAL-Standard Play
no Luminance Chrominance without
indication = = meaning
5 6
When pressing the remote control button Ï the software settings for
luminance and chrominance are displayed for the operating modes
NTSC Extended Play, NTSC Standard Play and PAL Long Play.
Example GV 900 SV/1:
n 0 7
EP
NTSC-Extended Play NTSC-Standard Play
no Luminance Chrominance Luminance
indication = =
0 7
2 - 4
0 0 0 0 0 0 0 1 0 1 0 1
= = = =
9 0 1 5
0 0 0 1 0 0 0 0 0 0 1 1
= = =
0 1 0 3
n 0 7 P 0 7
SP LP
PAL-Long Play
Chrominance Luminance Chrominance
= = = =
0 7 0 7
Display
EP n 07 07 07 07 07 07 07 07 07 07 07 07 07
SP n 07 07 07 07 07 07 07 07 07 07 07 07 07
LP P 07 07 35 35 35 35 35 35 35 35 07 35 35
SP P 56 56 45 45 45 45 45 45 45 45 56 45 45
1 = flashing, button G
Note:
0 = illuminated, button "CLEAR"
JP39 0 0 1 1 1 1 0
JP38 0 0 0 0 0 0 0
JP37 0 0 0 0 0 0 0
JP36 1 1 1 1 1 1 1
JP35 0 0 0 0 0 0 0
JP34 0 0 1 0 0 0 1
JP33 0 0 0 1 1 1 0
JP32 0 0 0 0 0 0 0
JP31 0 0 0 0 0 0 0
JP30 0 0 0 0 0 0 0
JP29 1 1 1 1 1 1 1
JP28 1 1 1 1 1 1 1
JP27 0 0 0 0 0 0 0
JP26 0 0 0 0 0 0 0
JP25 1 1 1 1 1 1 0
JP24 1 1 1 1 1 1 0
JP23 0 0 1 1 1 1 1
JP22 1 1 1 1 1 1 1
JP21 1 1 1 1 1 1 1
JP20 0 0 0 0 0 0 0
JP19 0 0 1 0 1 1 1
JP18 0 0 1 0 1 1 1
JP17 0 0 0 0 0 0 0
JP16 1 1 1 1 1 1 1
JP15 1 1 1 1 1 1 1
JP14 0 0 1 1 1 1 1
JP13 0 0 1 1 1 1 1
JP12 1 1 1 1 1 1 1
JP11 0 0 1 0 0 0 1
JP10 0 0 1 0 0 0 1
JP 9 0 0 0 0 0 0 0
JP 8 0 0 1 0 0 0 1
JP 7 0 0 0 0 0 0 0
JP 6 0 0 0 0 0 0 0
JP 5 0 0 0 0 0 0 0
JP 4 1 1 1 1 1 1 1
JP 3 0 0 0 0 0 0 0
JP 2 1 1 1 1 1 1 1
JP 1 0 0 1 0 0 0 1
JP 0 1 1 0 1 1 1 0
GV 900..., GV 940...
0 0 0 0 0 1
0 0 0 0 0 0
0 0 0 0 0 0
1 1 1 1 1 1
0 0 0 0 0 0
0 0 0 0 0 0
1 1 1 0 1 1
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
1 1 1 1 1 1
1 1 1 1 1 1
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 1 1 1
0 0 0 1 0 1
1 1 1 0 1 1
1 1 1 1 1 1
1 1 1 1 1 1
0 0 0 0 0 0
0 1 1 0 0 1
0 1 1 0 0 1
0 0 0 0 0 0
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 0 1 1
1 1 1 0 1 1
1 1 1 1 1 1
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
1 1 1 1 1 1
0 0 0 0 0 0
1 1 1 1 1 1
0 0 0 0 0 0
1 1 1 1 1 1
GRUNDIG Service