SERVICE ADJUSTMENTS
PV154 - 923-03506
3-17
ZP26/28 - SERVICING
CHASSIS PRE-HEAT RUN ADJUSTMENTS
PRESET EACH ADJUSTMENT VR TO THE CONDITION
SHOWN: BEFORE PRE HEAT RUN.
1. Red and Green Drive VR on the CRT PWB. This is
part of the I
2
C Service Menu. Set each to 3F. T o
Enter Service Menu, press the SOURCE button and
hold, then press the Power Button. Set comes on
and displays Service Menu.
2. SCREEN VR ON FOCUS PACK. Pre Set fully counter-
clockwise.
3. Focus VR on focus pack Pre Set fully clockwise.
4. Allow set to operate at least 30 Minutes before
beginning adjustments.
CHASSIS CUT-OFF (SCREENS) ADJUSTMENT
ADJUSTMENT PREPARATION:
· Pre Heat Run should be finished.
· Be sure Screen Color Temperature setting is in the
COOL mode
· Room Light should be minimal.
ADJUSTMENT PROCEDURE:
1. Go to I
2
C ADJ. Mode. (With power Off, press the
SOURCE button on the front panel and hold down,
then press the POWER ON button and release both
buttons. The Service Menu is displayed.)
2. Set R DRV (COOL) to center data value (3F).
3. Set G DRV (COOL) to center data value (3F).
4. Confirm that the R, G, and B CUTOFF (COOL) data
settings are [80].
5. Adjust Screen VRs on Focus Pack fully counter clock
wise.
6. Choose SERVICE item [1] of I
2
C ADJ. Mode. Select
CURSOR RIGHT and the Vertical will collapses.
7. Adjust any Screen VR. Screen VR should be turned
clockwise gradually until that particular color is
barely visible.
8. Repeat for the other two colors.
9. Exit SERVICE by pressing the CURSOR LEFT on re-
mote.
10. Exit SERVICE MENU by pressing the MENU key on
the remote.
CHASSIS PRE-FOCUS ADJUSTMENT
ADJUSTMENT PREPARATION:
Pre Heat Run should be finished.
FOCUS ADJUSTMENT:
1. Short the 2pin sub-miniature connector on the
CRT PWB (PTS), to remove any color not being
adjusted and adjust one color at a time. (The ad-
justment order of R, G and B is just an example.)
PTSR for RED, PTSG for GREEN and PTSB for BLUE.
2. Adjust the Focus VR for Red until Focus is achieved.
(A Fine Adjustment will be made later.)
3. Repeat for Blue and Green.
DCU CROSSHATCH PHASE ADJUSTMENT
ADJUSTMENT PREPARATION:
· Cut Off adjustment should be finished.
· Video Control: Brightness 90%, Contrast Max.
ADJUSTMENT PROCEDURE: NORMAL MODE
1. Receive any NTSC signal.
2. Press the SERVICE ONLY switch on the Convergence
PWB to enter DCAM mode and display DCU grid.
3. Change the Remote Control into VCR mode.
4. Press the (-) key on the Remote, Green Cross hatch
appears.
5. Change the Remote Control into TV mode.
6. Press the QUIT key. (This is the Phase adjustment
mode).
7. Adjust data value using the keys indicated in the
chart below, until the data matches the values in-
dicated in the chart.
Saving Data Values:
8. Change the Remote Control into VCR mode.
9. Press the (-) key on the Remote to exit phase mode.
10. Change Remote Control into TV mode.
11. Press MULTI key TWICE to store the information.
12. When Green dots are displayed, press the MUTE
key on remote.
13. Press the SERVICE ONLY switch to return to normal
video mode.
PHASE MODE Display Format NORMAL
Data
ADJUST ING
Address Data Value
4 and 6 keys on Remote
PH-H
BF
2 and 5 keys on Remote
PH-V
07
Cursor Left t and Right u on Remote
CR-H
4C
Cursor Up p and Down q on Remote
CR-V
0C
CHASSIS HORIZONTAL PHASE (COARSE) ADJUSTMENT
ADJUSTMENT PREPARATION:
· Cut Off, DCU Phase adjustments should be finished.
· Video Control: Brightness 90%, Contrast Max.
ADJUSTMENT PROCEDURE WIDE MODE:
1. Receive any NTSC crosshair signal.
2. Screen Format is WIDE.
3. Press the SERVICE ONLY switch on the convergence
PWB and display the Digital Convergence Cross-
hatch pattern.
4. Mark the center of the Digital Convergence Cross-
hatch Pattern with finger and press the SERVICE
ONLY switch to return to normal mode.
5. Enter the I
2
C Bus alignment menu (With Power Off,
press and hold the SOURCE button on the front
panel, then press the POWER button and Release
both buttons).
