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SHARP 21BS10
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SHARP 21BS10 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 18 (click to view)
21B-S10

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 functions. How to enable/disable the "Hotel Mode" ? Ans: a) Select the "Blueback" 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" and "9", then the hotel mode will be in enable condition, you can switch on/off the hotel mode by using R/C (volume up/down) key.
HOTEL MODE ON PASSWORD ****
Abnormal

TROUBLE SHOOTING TABLE
NO RASTER
Check F701. Blown out.

Normal

Replace the fuse.

Check T701 pin (7) voltage (Approx. 310V at 220V AC)

The fuse is blown out again.

Check R701, R707 and D709.

Normal

Check IC701, D701 and D707.

Set vol up/down by R/C key. Input 1, 3, 7 and 9 by R/C key.
Abnormal
Check IC702, IC753 and D758. Check CRT connector K1-K5 bias. Check Secondary Main+B (Approx. 115V)

Normal
Does D1001 (Power LED Green) turn on ?

#1 Ch 1 is your selected channel for hotel mode. * We recommend Before set the hotel mode, it is better to choose ch 1 & set s-vol 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)

YES

NO Normal Normal Abnormal
Which does D1001 (Power LED Red) turns on or turns ON/OFF ? Check R615 and R618. Check C878. Check IC801.

ON/OFF

ON
Checking the protector circuit.

18

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". The others function is allowed to be used.

Bus error mode. (See Fig. below)

YES

Does horizontal circuit oscillate ?

NO
Check IC751 and IC801.

If a bus error happens, the LED RED indicator starts flashing and the power is turned off. The power key is still effective. EEPROM V/C/J AV Switch Surround PLL Tuner IC1003 (M24C08) IC801 (TDA938X) IC401 (M52797SP) IC303 (AN5891K) TU201 (VTST5HD84) 2s 0.5s

18-1

18-2

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