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1. ADJUSTMENT PROCEDURE
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
CAUTION
•
Use an isolation transformer when performing any
service on this chassis.
•
Before removing the anode cap, discharge electricity
because it contains high voltage.
•
When removing a PCB or related component, after
unfastening or changing a wire, be sure to put the wire
back in its original position.
•
When you exchange IC and Transistor with a heat sink,
apply silicon grease on the contact section of the heat
sink. Before applying new silicon grease, remove all the
old silicon grease. (Old grease may cause damages to
the IC and Transistor.)
On-Screen Display Adjustment
1.
Unplug the AC plug for more than 30 minutes to set the
clock to the non-setting state. (To release the Back-Up
immediately, take the short circuit between C1003 and
GND at the Power Off.) Then, set the volume level to
minimum.
2.
Press the VOL. DOWN button on the set and the
channel button (9) on the remote control for more than
2 seconds to display adjustment mode on the screen as
shown in Fig. 1-1.
01
RF AGC
3.
Use the Channel UP/DOWN button or Channel button
(0-9) on the remote control to select the options shown
in Fig. 1-2.
4.
Press the MENU button on the remote control to end
the adjustments.
NO.
FUNCTION
NO.
00
CUT OFF
29
01
RF AGC
30
02
AGC GAIN
31
03
R DRIVE
32
04
R CUTOFF
33
05
G DRIVE
34
06
G CUTOFF
35
07
B DRIVE
36
08
H POSI
37
09
V POSI
38
10
---
39
11
V SIZE
40
12
---
41
13
VCO COARSE
42
14
VCO FINE
43
15
VCO COARSE L1
44
16
VCO FINE L1
45
17
BRIGHT CENT
46
18
BRIGHT MAX
47
19
BRIGHT MIN
48
20
CONTRAST CENT
49
21
CONTRAST MAX
50
22
CONTRAST MIN
51
23
COLOR CENT
52
24
COLOR MAX
53
25
COLOR MIN
54
26
---
55
27
SHARP
56
28
M R CUT OFF
57
ELECTRICAL ADJUSTMENTS
TV
40
FUNCTION
NO.
FUNCTION
M G CUT OFF
58
ZM CINEMA
M B CUT OFF
59
S CORR CINEMA
H POS OSD
60
---
---
61
VS 16:9
---
62
HS 16:9
---
63
PC 16:9
CVBS OUT
64
CC 16:9
APR THRESHOLD
65
ZM 16:9
BELL FILTER
66
---
BANDPASS
67
---
REC AGC
68
VS 14:9
VS 4:3
69
HS 14:9
HS 4:3
70
PC 14:9
PC 4:3
71
CC 14:9
CC 4:3
72
ZM 14:9
S CORR
E/W SHAPE
TRAPEZIUM
VS FULL
HS FULL
PC FULL
CC FULL
V POSI
---
---
VS CINEMA
HS CINEMA
PC CINEMA
Fig. 1-2
CC CINEMA
2. BASIC ADJUSTMENTS
(VCR SECTION)
2-1: PG SHIFTER
1.
Playback the alignment tape.
2.
Press and hold the Tracking-Auto button on the remote
control more than 2 seconds to set tracking to center.
3.
Press the VOL. DOWN button on the set and the
channel button (3) on the remote control simultaneously
until the indicator REC disappears. If the indicator REC
disappears, adjustment is completed.
(If the above adjustments doesn't work well:)
4.
Connect CH-1 on the oscilloscope to TP4502 and CH-2
to TP4501.
5.
Press the VOL. DOWN button on the set and the
channel button (3) on the remote control simultaneously
until the indicator REC disappears.
6.
When the REC indicator is blinking, press both VOL.
DOWN button on the set and the channel button (4) on
the remote control simultaneously and adjust the
Tracking +/- button until the arising to the down of Head
Switching Pulse becomes 6.5 ± 0.5H.
(Refer to Fig. 2-1-A, B)
7.
Stop the alignment tape.
Fig. 1-1
2-2: VCO
(MONITOR TUNER)
1.
Place the set in Aging Test for more than 10 minutes.
2.
Connect the oscillator (39.5MHz) to TP601.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (13) on the remote control to
select "VCO COARSE".
4.
Press the LEFT/RIGHT button on the remote control
until the "OK" appear on the screen. If the "OK" is not
displayed, select the "-" side on the changed from "+" to
"-".
5.
Press the channel button (14) to set to "VCO FINE"
mode.
6.
Press the LEFT/RIGHT button on the remote control to
select the 5 step down point from the upper limit on the
"OK".
(Example: In case of the "OK" point 41, select 36.)
D3-1
CH-2
6.5H
CH-1
Fig. 2-1-A
CH-2
CH-1
6.5H
Fig. 2-1-B
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