Digital Equipment 21BM18, Service Manual

Page: 12 / 51

SERVICE MANUAL
10
5UCR/6
UCR
1F
Upper corner parabola correction (for large-screen
only)
5LCR/6L
CR
1F
Lower corner parabola correction (for large-screen
only)
5EWT/6
EWT
1F Trapezoidal correction (for large-screen only)
5VSL/6V
SL
1F Vertical slope (for large-screen only) *
5VAM/6V
AM
1F
Vertical amplitude; For 50Hz,
“
5VAM
”
is displayed
；
for 60Hz,
“
6VAM
”
is displayed.
*
5SCL/6S
CL
Set to the
optimal mode
S correction *
5VSH/6V
SH
Set to the
optimal mode
Vertical center in the TV mode for 50Hz/60Hz. For
50Hz,
“
5VSH
”
is displayed
；
for 60Hz,
“
6VSH
”
is
displayed.
*
5VOF/6V
OF
Set to the
optimal mode
OSD vertical center *
VX 19 Vertical zoom (for large-screen only)
RED 20 Red gun cutoff voltage *
GRN 20 Green gun cutoff voltage *
WPR 1F Red gun drive voltage *
WPG 1F Green gun drive voltage *
WPB 1F Blue gun drive voltage *
YDFP/Y
DFN
07 PAL brightness delay time/ NTSC brightness delay time
TOP 10-1F UOC AGC *
VOL 2 A
TV audio output power can be adjusted by means of
UOC audio output amplitude. Generally, UOC audio
output amplitude is set to 26 for 21” models with stereo
output of 3W+3W; 2C for 21” models with stereo output
of 5W+5W; 24 for 14” models with mono output of
2WX2; 22 for 14” models with mono output of 1WX2.
*
IFFS 03
（
02
）
PIF (02-38.9MHz, 03-38MHz)
HDOL 00-07 Cathode drive level (typical: 04-07)
AGC 03 IF ACG speed
VG2B 3A
VG2 brightness setting(VG2B): 3A for 21” models;
2E for 14” models;
Contrast Max. setting (MCON): 30 for 21” Malaysia
Matsushita or BMCC CRT with ferrite mask;
MCON: 30; VG2B: 30, HDOL: 04 for 21” Chunghwa
CRT
(continued)