Hotel Mode Application Note; Trouble Shooting Table - Sharp 14BM2 Service Manual

UA1 HOTEL MODE APPLICATION NOTE
The purpose of this HOTEL MODE is to enable hotel authorized person to store the tuned
programs as hotel channels, current volume as hotel volume (maximum volume), picture and
sound setting. In addition, The user will not be able to select Preset and Channel-setting func-
tions.
How to enable/disable the "Hotel Mode" ?
Ans: a) Select BLUE BACK function (under MENU-FEATURE selection) by R/C,
press the -/— (one/two digit) key and keep pressing it for five second, then you can
see the hotel mode with four digits password.
b) Key in the four digits password starting with number "1", "3", "7", "9", then the hotel
mode will be ENABLE condition, you can switch on/off the hotel mode by using R/C
(volume up/down) key.
HOTEL MODE ON
PASSWORD ****
Input 1, 3, 7 and 9 by R/C key.
* We recommend:
Before set the hotel mode, it is better to choose CH 1 & set SOUND VOLUME level Up to
75% full scale.
After set hotel mode, starting channel will be always ch 1 & maximum sound level out will
be set to 75% of full scale.
* If you set hotel mode in AV, starting channel will be the last ch which you received before
power off (same as normal operation).
CONDITION:
When using hotel mode, the user can ONLY control PICTURE, SOUND and FEATURE
selection. But, It will return to the previous hotel mode setting condition, after power off.
The user can't use: — CH-SETTING (OSD become violet) and Preset. Other functions is
allowed to be used.
Set VOL UP/DOWN by R/C key.
#1 Ch 1 is your selected
channel for hotel mode.
15-1

TROUBLE SHOOTING TABLE

NO RASTER
Check F701.
Normal
Check T701 pin (7) voltage
Abnormal
(Approx. 310V at 220V AC)
Check R701, R707 and
Normal
D709.
Check Secondary Main+B
T701 pin (17) voltage
Abnormal (Approx. 115V)
Check D758, IC702, IC753 Check CRT connector
and R712.
K1-K5 bias.
Normal Normal
Check
Check R615 and R618.
C787.
Does horizontal circuit
oscillate ?
NO
Check IC801, IC751, D605
and Q601.
Blown out.
Replace the fuse.
The fuse is blown out again.
Check IC701, D701 and
C707.
Normal
D1001 (Power LED Green)
turns on.
YES
NO
Abnormal
D1001 (Power LED Red)
turns on or turns ON/OFF.
Check ON/OFF ON
IC801.
Checking the
protector circuit.
15-2