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Excellent service manual, the only known point of note is the alignment of improvability scanned pages within the pdf page. The resolution is good.
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I was very glad recieving the service manal from You. Additionaly very fast. Extremaly nice servicing. Thanks very mach! Now my GX-220 working better, than it was made. Alexander from Moscow, Russia/
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Sweet! I won the item on eBay and couldn't adjust the geometry or even keep a steady picure. This guide has the full schematics (not available anywhere else as far as I could tell), and was a bargain for the wealth of knowledge it contains. I hooked it up to my testing equipment, tweaked a few potentiometers and got it playing videogames in no time. Thanks!
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It was just what I need to fix my old BMW's CD player. Very convenient also. Thank you.
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Great Manual! It contains all the wiring schematics and mechanical exploded views that are essential for service and repair. I was surprised I even found this for such an old machine. Only wish I knew of this site many years ago.
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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