ANTENNA CONNECTIONSVCO ADJUSTMENT
This receiver is designed for UHF/VHF reception. A 75 ohm
Note: VCO must be adjusted after IC101 (Signal Processor),
terminal is provided for UHF and VHF receptions. When
IC802 (EEPROM) or T151 (IF VCO Coil) is replaced.
connecting a CATV antenna system, connect the 75 ohm
1. Tune receiver to an active channel.
coaxial cable directly to the 75 ohm terminal. For 300 ohm VHF
2. Set the picture controls to the Sports level.
antenna, use the adapter (included with the TV set).
3. Connect digital voltmeter + lead to pin 58 of IC101(TP10)
CIRCUIT PROTECTIONand � lead to ground (TE 7).
Fuse F601 (4A) is included in the AC line. This fuse must be4. Confirm a reading of 3.6 ?0.6 VDC.
replaced with the proper fuse. (See Parts List.)5. If voltage is out of specifications adjust T151 for 3.6 ?0.6
VDC.
CAUTION FOR CONTINUED PROTECTION AGAINST A
RISK OF FIRE, REPLACE ONLY WITH THE
RF-AGC ADJUSTMENT
SAME TYPE 4A, 125V FUSE.
1. Tune receiver to strongest VHF station in your area.
2. Set contrast and brightness controls for maximum.
4A 125V
ATTENTION: POUR MAINTENIR LA
3. Turn off the receiver and disconnect the AC power cord
PROTECTION CONTRE LES RISQUES D?
(120V AC line).
INCENDIE UTILISER UN FUSIBLE DE
4. While pressing the MENU key, reconnect the AC power
RECHANGE DE MEME TYPE 4A, 125V.
cord. The Service Menu display will now appear.
5. Select No. 42 RAD (RF AGC Delay) with or key.
+B VOLTAGE CHECK6. Adjust the data with + or � key in the direction which causes
Connect voltmeter + lead to TJ1 130V and � lead to ground
snow to appear, then in the opposite direction until the snow
(TE7). Connect receiver to AC 120V line. Tune receiver to an
just disappears.
active channel. Reset the picture controls to the FACTORY
PRESET levels (press remote control RESET key twice).
VIDEO LEVEL
Voltage must measure between +128.0V and +132.0V. If the
1. Connect color-bar generator to antenna terminal.
voltage is out of this range, the power circuit must be checked.
2. Turn off the receiver and disconnect the AC power cord
No +B adjustment is provided on this chassis.
(120V AC line).
3. Connect oscilloscope to TP16(Q202 emitter) and ground.
HORIZONTAL CENTERING ADJUSTMENT
4. While pressing the MENU key, reconnect the AC power
1. Tune receiver to an active channel.
cord. The Service Menu display will now appear.
2. Check that picture is in the horizontal center of TV screen.
5. Select No. 46 VL (Video Level) with or key.
If picture is too right or left, perform steps 3 ~ 6.
6. Adjust the + or � key for an oscilloscope reading of 1.0?0.1
3. Turn off the receiver and disconnect the AC power cord.
Vp-p at TP16. Press the MENU key to turn off the Service
4. While pressing the MENU key, reconnect the AC power cord.
Menu display.
The Service Menu display will now appear.
5. Select No. 03 HP (Horizontal Phase) with or key.
6. Adjust the data with + or � key for horizontal center.
To turn off the Service Menu displayMENU, press the key.
VERTICAL SIZE ADJUSTMENT
1.0 ?0.1 Vp-p
1. Tune receiver to an active channel.
2. Check the vertical size of the picture. If the vertical size is too
large or small, perform steps 3 ~ 6.
3. Turn off the receiver and disconnect the AC power cord.
4. While pressing the MENU key, reconnect the AC power cord.
Figure 4.
The Service Menu display will now appear.
5. Select No. 04 VS (Vertical Size) with or key.
6. Adjust the data with + or �key for full scan. To turn off the
Service Menu display, press the MENU key.
VERTICAL CENTERING ADJUSTMENT
1. Tune receiver to an active channel.
2. Check that picture is in the vertical center of TV screen. If picture
center is too low, add a cutting wire to R513.
N 7N |
ACEC
