GE3
0 Service adjustmmts
Note! Before other adjustments Ul voltage must be adjusted.
Other service adjustments
If the set cannot be switched on with the number buttons, please see
under ?RC Mode? (Service menu 2). Horizontal amplitude ,c
Wait! Allow the TV set to be switched on for 10 minutes before any Adjust 90? CRTs horizontal amplitude with coil LK 12.
adjustment. Adjust 110? SQ and FST - CRT?s with resistor RK66.
Service mode
Select the service mode by pressing the Mute, OK (MI and TV buttons in Vertical position
sequence on the remote control unit. Use the blue button to call up the Adjust vertical position by severing resistor RS24, and/or RS14.
Service Menu 2, 3 (or Service Menu 1 again).
Focus
Cursor button A or v = To select required adjustment
Use focus adjuster TK02 (at horizontal transformer) to set the focus to
Cursor button 4 or) = To adjust it
OK (M) button = To store the adjustment into the memory. optimum sharpness.
TV button = To return to normal TV mode.
Cushion
Adjust 110? SQ and FST CRT?s with resistor RK60.
Service adjustments which are made in service mode
Display Note G2 and colour temperature
Service Menu 1 1. Set the UG2 adjustment (the lower adjustment at horizontal
Start APS YES = APS; search function will be run automatically transformer) to its middle position.
when the set is switched on for the first time and stores 2. Select the IDEAL picture setting and switch the set to AV programme
all stations into the memory. number or other black screen picture.
V-Amplitude Adjust the bottom edge. 3. Using the oscilloscope with 1OO:l probe determine the colour cathode
H-Shift Stereo set: Adjust centre of the test picture horizontaly
with the highest black level measuring pulse at IC NHOl,
to a centered position.
pins 9, 12 and 15.
Mono set: Adjust centre of the test horizontal to a
4. Adjust the highest measuring pulse to 150V (measured against ground).
centered position with RK 45.
Ul Ul operating voltage, see adj. ?Ul voltage?.
AGC See adjustment ?AGC?. AFC
1. Feed in symmetric IF signal (ca. 0,8 Vpp) by means of 4:l transmitter at
Service Menu 2
test points XL 03 and XL 04. (38,9 MHz for standard BG, DK and 39,5
Set Standard Select required standard.
MHz for standard I)
APS Standard Set to approriate television standard.
2. At test point XL 01 (XL 02 to ground) set 3,5 V DC i 0,5 V with coil ZL 01
RC Mode (Remote Control), select the other remote control units.
(AFC reference).
Front AV YES, if front AV socket is available.
3. Multistandard set, standard L?: After proper BG adjustment select a
Text Characters Teletext character sets: OFF, EUtCS, EUtTR,
channel in band 1 (L?-range). Activate standard L in Tuning menu.
East 1, East 2
Feed in symmetric IF signal (ca. 0,8 Vpp) by means of 4:l transmitter at
Service Menu 3 (only with stereo sets) test points XL 03 and XL 04. (33,9 MHz for standard L?) At test point XL
Equalizer YES/NO ; YES = on 01 (XL 02 to ground) set 3,5 V DC + 0,5 V with capacitor CL 05.
C4 Bit Ya$witches back to FM-sound, if FM-sound # Nicam
AFC check
No: Switches Nicam during Nicam-transmission.
Detune the IF signal to approx. 39 MHz (39,7 MHz, 34 MHz). Then the
Loudness YES/NO
AVC Yes: Supresses sound cracks. voltage must drop to approx. IV.
Carrier Mute Yes: Switches sound off, if carrier missing.
Hi-Dev Displays ?HDM? line in the audio menu, use
Sound of multistandard sets
in case of overmodulation of sound.
(standard BG, DK or standard I)
Make the standard adjustment as follows:
Adjustment Ul voltage 1. RCF remote control unit: Press the PROG button. 6?
1. Set the contrast and brightness to minimum. RCN remote control unit: Press the blue MENU button twice.
2. Connect test point XFOI (chassis board) to ground. 2. Select the menu line Tuning, Manual tuning.
3. Go to service menu 1 (see service mode). 3. Select STANDARD BG, DK or I with cursor buttons 4 and ).
4. Use cursor button A or v to select Ul-adjustment. 4. Store the setting by pressing the OK (M) button.
5. Adjust with cursor button 4 or) 5. Return to normal TV viewing by pressing the TV button.
IlOV f IV 14? (Philips/Samtel ) and 20? (Videocolor)
135V i IV 21? (Philips)
AM sound (multistandard module)
150V + IV 25? and 28? (Videocolor)
1. Connect a sweep generator with 30-40 MHz marking to pin 14 of AL-
6. Use OK (M) memory button to store the value into the memory.
connector.
7. Remove XFOl/ground connection.
2. Connect an oscilloscope to pin 11 of AL-connector.
8. Return to normal TV mode by pressing the TV button.
3. Connect a control voltage supply to pin 3 of TDA 9830.
4. L standard: The voltage at pin 09 of AL-connector = 0 V.
AGC Set the output amplitude to 200 mV by means of the control voltage and
1. Connect test point XFOl (Chassis board) to ground. keep this value during the adjustment.
2. Feed in RF signal without sound carrier with 72 dBpV (= 4mV) on a Adjust the amplitude of 34,2 MHz to maximum with ZL 651 and ZL 652.
medium UHF channel via the aerial input. 5. After proper L-adjustment:
3. Go to service menu 1 (see service mode). L? standard: The voltage at pin 10 of AL-connector = 12 V.
4. Use cursor button A or v to select AGC adjustment. Set the output amplitude to 200 mV by means of the control voltage and
5. Connect oscilloscope (Bandwidth > 50 MHz) to the tuner?s IF output keep this value during the adjustment.
(test point XL03 or XLO4) and to ground (XLO2). Adjust the amplitude of 40,4 MHz to maximum with RL 673.
6. Use cursor button 4 and) to adjust 350 mVpp +O/-50mV with
reference to the signal?s synchronizing peaks.
7. Use OK (M) memory button to store the value into the memory.
8. Remove XFOl/ground connection.
9. Return to normal TV mode by pressing the TV button.
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ACEC
