— 9 —
SERVICE ADJUSTMENTS (Continued)
ANTENNA CONNECTIONS
This receiver is designed for UHF/VHF and Digital RF recep-
tion. A 75 ohm terminal is provided for UHF/VHF/Digital RF
reception. When connecting a CATV antenna system, con-
nect 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 (6A) is included in the AC line. This fuse must be
replaced with the proper fuse (see Parts List).
+B VOLTAGE CHECK
1. Connect Voltmeter + lead to TJ1 (130.0 V) and – lead to
ground (Power/Deflection board).
2. Connect receiver to AC 120V line.
3. Tune receiver to an active channel.
4. Set the picture controls to the Auto or Reset (use MENU
key and or key or RESET key).
5. Voltage must measure between 128.0 V and 132.0V.
If the voltage is out of range, the power circuit must be
checked. No +B adjustment is provided on this chassis.
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.
(120V AC line)
4. While pressing the VOLUME – key, reconnect the AC
power cord. The Service Menu display will now appear.
5. Select NO. 41 (HP: Horizontal Phase, Bit 4 ~ 0) with or
key.
6. Adjust the data with numeric keys for horizontal center. To
turn off the Service Menu display, press the MENU key.
HORIZONTAL WIDTH ADJUSTMENT
1. Tune receiver to an active channel.
2. Check the picture for proper width. If width is not cor-
rect, perform steps 3 - 6.
3. Turn off the receiver and disconnect the AC power cord.
4. While pressing the VOLUME – key, reconnect the AC
power cord. The Service Menu display will now appear.
5. Select NO. 69 (EWD: East/West DC Bit 5 ~ 0) with
or key.
6. Adjust the data with numeric keys for proper width. To
turn off the Service Menu display, press the MENU key.
VERTICAL SIZE ADJUSTMENT
1. Tune receiver to an active analog 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 VOLUME – key, reconnect the AC
power cord. The Service Menu display will now appear.
5. Select NO. 42 (VS: Vertical Size, Bit 6 ~ 2) 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 (470 ohm 1W). If picture
center is too high, add resistor R512 (470 ohm, 1W).
RF AGC ADJUSTMENT
1. Tune receiver to strongest VHF station in your area.
2. Set contrast and brightness controls for maximum.
3. Turn off the receiver and disconnect the AC power cord
(120V AC line).
4. While pressing the Volume – key, reconnect the AC
power cord. The Service Menu display will now appear.
5. Select NO. 62 RAD (RF AGC Delay Bit 5 ~ 0) with or
key.
6. Adjust the data with + or – key in the direction which
causes snow to appear; then in the opposite direction
until the snow just disappears.
7 . To turn off the Service Menu display, press the MENU key.
VIDEO LEVEL
1. Connect color-bar generator to antenna terminals.
2. Turn off the receiver and disconnect the AC power cord
(AC 120V line).
3. Connect oscilloscope to TP16 (Q132 emitter) and ground.
4. While pressing the Menu key, reconnect the AC power
cord. The Service Menu will now appear.
5. Select NO. 63 VL (Video Level Bit 4 ~ 2) with the or
key.
6. Adjust with the number keys (4~2) for an oscilloscope
reading of 1.0 ± 0.1 VP-P at TP16. Press the MENU key to
turn off the Service Menu display.
CAUTION
FOR CONTINUED PROTECTION AGAINST
A RISK OF FIRE, REPLACE ONLY WITH
THE SAME TYPE 6A, 125V FUSE.
ATTENTION : POUR MAINTENIR LA PRO-
TECTION CONTRE LES RISQUES
D’ INCENDIE UTILISER UN FUSIBLE DE
RECHANGE DE MEME TYPE 6A, 125V.
To Next Page
Loading...
