— 8 —
SERVICE ADJUSTMENTS (Continued)
ANTENNA CONNECTIONS
This receiver is designed for UHF/VHF reception. A 75 ohm
terminal is provided for UHF and VHF receptions. When
connecting a CATV antenna system, connect the 75 ohm
coaxial cable directly to the 75 ohm terminal. For 300 ohm
VHF antenna, use an adapter (not included with the TV set).
CIRCUIT PROTECTION
Fuse F601 (4A) is included in the AC line. This fuse must be
replaced with the proper fuse (see Parts List).
+B VOLTAGE CHECK
Connect Vol lead to TJ1 130V and – lead to ground
(TE7). Connect receiver to AC 120V line. Tune receiver to an
active channel. Reset the picture controls to the FACTORY
PRESET levels (press remote control RESET key twice).
Voltage must measure b128.0V and +132.0V. If the
voltage is out of this range, the power circuit must be
checked. No +B adjustment is provided on this chassis.
HORIZONTAL WIDTH ADJUSTMENT
1. Tune receiver to an active channel.
2. Check the picture for proper width. If width is not correct,
perform steps 3 ~ 6.
3. Turn off the receiver and disconnect the AC power cord
(120V AC line).
4. While pressing the MENU key, reconnect the AC power
cord. The Service Menu display will now appear.
5. Select NO. 08 EWD (Horizontal Width) with
▲
or
▼
key.
6. Adjust the data with + or – key for proper width. To turn
off the Service Menu display, press the MENU key.
HORIZONTAL CENTERING ADJUSTMENT
1. Tune receiver to an active channel.
2. Check that picture is in the horizontal center of TV screen.
If picture is not centered horizontally, 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. The Service Menu display will now appear.
5. Select NO. 07 HP (Horizontal Position) with
▲
or
▼
key.
6. Adjust the data with + or – key for horizontal center. To
turn off the Service Menu display, press the MENU key.
VERTICAL SIZE ADJUSTMENT
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. 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. Chec k that picture is in the center of TV screen. If picture
center is too low, add resistor R513 (1K ohm 1W). If picture
center is too high, change resistor R512 from 1K ohm 1/2W
to a 470 ohm 1W.
GRAYSCALE ADJUSTMENT
1. Connect a color-bar generator to the antenna terminals.
2. Switch the generator to the white pattern.
3. Set the picture controls to the Sports level or Reset (use
MENU key and
▲
or
▼
key or RESET key).
4. Turn off the receiver and disconnect the AC power cord
(120V AC line).
5. While pressing the MENU key, reconnect the AC power
cord. The Service Menu display will now appear.
6. Select NO. 18 RD (Red Drive), NO. 19 GD (Green Drive), and
NO. 20 BD (Blue Drive) with
▲
or
▼
key and set each data to
31 with + or – key.
7. Select NO. 21 RB (Red Cutoff) with
▲
or
▼
key and set
data to 6 with + or – key.
8. Select, NO. 22 GB (Green Cutoff), and NO. 23 BB (Blue
Cutoff) with
▲
or
▼
key and set each data to 0 with + or
– key.
9. Set NO. 28 SB (Sub Brightness) data to 12, NO. 29 SSH
(Sub Sharpness) data to 2, NO. 33 DCO (Dynamic Color
Switch) data to 0, and NO. 108 SBO (Sub Bright Offset)
data to 0 with
▲
or
▼
, and + or – keys.
10. Connect oscilloscope probe (at least 50:1) to TP47G and
ground lead to TE47 on the CRT Socket PWB.
11. Select Service Menu NO. 119 with
▲
or
▼
key.
12. Adjust Screen Control (T402) to obtain 20 VP-P from
black to white level. (See Figure 2.)
13. Select the Service Menu NO. 118 DRV (Drive Adjustments)
with
▲
or
▼
key.
14. Adjust Red and Blue Drive Levels alternately with 1, 3, 7, or 9
key to produce normal black and white picture in highlight
areas. The Drive Level adjustment data will be written in the
Service Menu No. 18 and 20 automatically. (See Figure 3.)
17. Check for proper grayscale at all brightness levels.
Note: If Grayscale Adjustment is made after picture tube
replacement, check Brightness Level Adjustment.
CAUTION
FOR CONTINUED PROTECTION AGAINST
A RISK OF FIRE, REPLACE ONLY WITH THE
SAME TYPE 4A, 125V FUSE.
ATTENTION : POUR MAINTENIR LA PRO-
TECTION CONTRE LES RISQUES
D’ INCENDIE UTILISER UN FUSIBLE DE
RECHANGE DE MEME TYPE 4A, 125V.
4A 125V
1H
20 Vp-p
1
2
3
4
5
6
7
9
8
RD(–)
RD(+)
BD(–)
BD(+)
(N/A)
(N/A)
(N/A)
(N/A)
(N/A)
Figure 3. Remote Control Number keys’ functions in
Service Menu NO. 118 DRV
FOR RED DRIVE ADJUSTMENT
FOR BLUE DRIVE ADJUSTMENT
Figure 2.
