8
Electrical adjustments
30
L7.3A
8.2.2
White-D adjustment (software adjustment)
Connect a pattern generator (e.g. PM5418) and set it to white
raster pattern.
Enter SAM by using the Dealer Service Tool or short-circuit
service pins M28 and M29 on PCB and switch power "ON"
The menu will be displayed whenever SAM mode is entered.
Enter into WHITE TONE menu and select item NORMAL,
DELTAWARM, or DELTACOOL; only one of the three items
(R, G or B) will be displayed on the screen. The initial default
value setting for NORMAL is 37.The factory settings of the
colour temperatures are:
8.3
Audio adjustments
8.3.1
BTSC Sound adjustment (software adjustment)
Set generator (e.g. PM5418) BLACK(without video) pattern,
set audio to stereo mode, carrier "ON" and test data to 1, RF
frequency NTSC 187.25MHz with signal amplitude of 1mv and
connect this signal to the aerial input.
Enter SAM mode by Dealer Service Tool or short-circuit service
pins M28 and M29 on PCB and switch power "ON"
The menu is present whenever SAM mode is entered. Enter
into the AUDIO menu and select item according to factory
setting. Check the sound quality by the generator setting listed
below.
The factory settings for BTSC are :
Abbriviations:
ST-NT -> Stereo Nicam adjustment
SAP-NT -> Second audio program adjustment
LA -> L L' adjustment
WIDEB -> Wideband adjustment
SPECT -> Spectral adjustment
NOTE: ALL VALUES ARE RECOMMENDED NOMINAL
VALUES.
8.3.2
2CS/NICAM Sound adjustment (software adjustment)
Set generator (e.g. PM5418) BLACK(without video) pattern,
set audio to stereo mode, carrier "ON" , set RF frequency PAL
189.25MHz, NTSC 55.25MHz with signal amplitude - 1mv and
connect to aerial input. Enter the SAM mode by using the
Dealer Service Tool or short-circuit service pins M28 and M29
on PCB and switch power "ON". The menu is displayed
whenever SAM mode is entered.
Enter into AUDIO menu and select item according to factory
setting. Check the sound quality by the above generator
setting. The factory settings for 2CS/NICAM are :
NOTE: ALL VALUES ARE RECOMMENDED NOMINAL
VALUES.
NORMAL
10500K
R = 37
G = 37
B = 37
DELTA
COOL
14000K
R = 0
G = 254
B = 249
DELTA
WARM
8200K
R = 0
G = 1
B = 3
AUDIO
AUTO
>
ST-NT
7
SAP-NT
7
LA
7
WIDEB
19
SPECT
19
AUDIO
A-FM
80
AT
8
STEREO
143
DUAL
113