Changhong Electric 21BM91, Руководство по обслуживанию, Страница: 12 / 58

SERVICE MANUAL
with a DC-500 high resistance meter and insulation resistance between the naked metal and
degaussing coil to be over 20M
Ω
.
6. SERVICE mode
6.1 To enter the DESIGN/SERVICE mode
Set the volume to 0. Then press and hold the MUTE button on the remote control, and press the
MENU button on the TV to enter the SERVICE mode. In this case, red
“
S
”
is displayed on the
upper center of the screen. To exit from the S mode, turn off the TV set by the POWER button on
the remote control.
Caution: The user service mode adjustment can be changed only when service personnel adjust
the whole set data during servicing. As the control data have dramatic effects on functions and
performance of the TV, service personnel should not tell user how to enter the SERVICE mode to
avoid improper data settings.
6.2 Adjustments and bus data (CH08T060 6 )
Table 4 Function Description for Bus Data
10
Bit Function Description Status
Bit7.6
Audio system options (available during
auto search and use of AUTO button)
00: B/G 01: I
10: D/K 11: M
Bit5
Bit4
SECAM
INHIBIT
00: SECAM gate pulse width, 2.2
usec
01: 2.0 usec
10: 1.8 usec
11: SECAM demodulation inhibit
Bit3 V MUTE
When changing channels:
0: Y-MUTE 1: RGB MUTE
Bit2 SECAM
0: No 1: Yes
Bit1 AUTO2 0: PAL 1: Without PAL
MODE0
Bit0
Power-on modes
0: Memory on 1: Soft on
(continued)