SERVICE ADJUSTMENTS (Continued)
ANTENNA CONNECTIONSGRAYSCALE ADJUSTMENT
This receiver is designed for UHF/VHF reception. A 75 ohm 1. Set the picture controls to the Auto levels (use MENU
terminal is provided for UHF and VHF receptions. Whenkey and or key or RESET key).
connecting a CATV antenna system, connect the 75 ohm2. Turn off the receiver and disconnect the AC power cord
coaxial cable directly to the 75 ohm terminal. For 300 ohm(120V AC line).
VHF antenna, use an adapter (not included with the TV set).3. While pressing the MENU key, reconnect the AC power
cord. The Service Menu display will now appear.
CIRCUIT PROTECTION
4. Select NO. 47 RB (Red Bias), NO. 48 GB (Green Bias),
Fuse F601 (4A) is included in the AC line. This fuse must be
and NO. 49 BB (Blue Bias) with or key and set each
replaced with the proper fuse (see Parts List).data to 00 with + or � key.
CAUTION5. Select NO. 4A RD (Red Drive) and NO. 4C BD (Blue Drive)
FOR CONTINUED PROTECTION AGAINST
with or key and set each data to 40 with + or � key.
A RISK OF FIRE, REPLACE ONLY WITH
6. Set NO. 3C SCO (Sub Color) data to 1D, NO. 3D STI (Sub
THE SAME TYPE 4A, 125V FUSE.
Tint) to 08, NO. 3E SB (Sub Brightness) data to 20, NO. 3F
ATTENTION : POUR MAINTENIR LA PRO-SSH (Sub Sharpness) data to 05, and NO. 4B GD (Green
TECTION CONTRE LES RISQUES Drive Reduction) data to 0B with or , and + or � keys.
4A 125V
DO INCENDIE UTILISER UN FUSIBLE DE7. Turn Screen Control (T402) to minimum (fully counter-
RECHANGE DE MEME TYPE 4A, 125V.clockwise).
8. Select the Service Menu NO. 90 (Bias Adjustments � No
+B VOLTAGE CHECKVertical Sweep) with or key.
Connect Voltmeter + lead to TJ1 135V and � lead to ground9. Advance Screen Control (T402) clockwise to obtain just
(TE7). Connect receiver to AC 120V line. Tune receiver to anvisible one color line. If line does not appear, place this
active channel. Reset the picture controls to the AUTOcontrol to maximum (fully clockwise).
level. Voltage must measure between +133.0V and +137.0V.10. Raise each Bias Level with 3, 6, and 9 keys to obtain just
If the voltage is out of this range, the power circuit must bevisible white line. (See Figure 4.)
checked. No +B adjustment is provided on this chassis.
123FOR RED BIAS ADJUSTMENT
HORIZONTAL CENTERING ADJUSTMENTRB(�)(N/A)RB(+)
1. Tune receiver to an active channel.456FOR GREEN BIAS ADJUSTMENT
2. Check that picture is in the horizontal center of TV screen. IfGB(�)(N/A)GB(+)
picture is not centered horizontally, perform steps 3 ~ 6.789FOR BLUE BIAS ADJUSTMENT
BB(�)(N/A)BB(+)
3. Turn off the receiver and disconnect the AC power cord
(120V AC line).Figure 4. Remote Control Number keysO functions in
4. While pressing the MENU key, reconnect the AC powerService Menu NO. 90
cord. The Service Menu display will now appear.
11. Select the Service Menu NO. 8F DRV (Drive Adjustments)
5. Select NO. 41 HPS7HP (Horiz. Phase) with or key.
with or key.
6. Adjust the data with + or � key for horizontal center. To
12. Adjust Red and Blue Drive Levels alternately with 1, 3,
turn off the Service Menu display, press the MENU key.
7, or 9 key to produce normal black and white picture in
highlight areas. (See Figure 5.)
VERTICAL SIZE ADJUSTMENT
1. Tune receiver to an active channel.
123FOR RED DRIVE ADJUSTMENT
2. Check the vertical size of the picture. If the vertical size is
RD(�)(N/A)RD(+)
too large or small, perform steps 3 ~ 6.
456
3. Turn off the receiver and disconnect the AC power cord(N/A)(N/A)(N/A)
(120V AC line).789FOR BLUE DRIVE ADJUSTMENT
4. While pressing the MENU key, reconnect the AC powerBD(�)(N/A)BD(+)
cord. The Service Menu display will now appear.
Figure 5. Remote Control Number keysO functions in
5. Select NO. 42 VS (Vertical Size) with or key.
Service Menu NO. 8F DRV
6. Adjust the data with + or � key for full scan. To turn off
the Service Menu display, press the MENU key.
13. Check for proper grayscale at all brightness levels.
To turn off the Service Menu display, press the MENU key.
VERTICAL CENTERING ADJUSTMENT
1. Tune receiver to an active channel.Note: If Grayscale Adjustment is made after picture tube
2. Check that picture is in the center of TV screen. If picturereplacement, check Brightness Level Adjustment.
center is too low, add resistor R513 (470 ohm, 1W). If picture
center is too high, add resistor R512 (470 ohm, 1W).FOCUS ADJUSTMENT
Adjust focus control (T402) for well defined scanning lines.
N 6 N |
ACEC
