Electrical Adjustments; Adjustment Procedure; Basic Adjustments - Toshiba 30HF84 Service Manual

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 for a heat sink,
apply the 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.)
Prepare the following measurement tools for electrical
adjustments.
1. Oscilloscope
2. Digital Voltmeter
3. Multi-sound Generator
4. Pattern Generator
On-Screen Display Adjustment
1. In the condition of NO indication on the screen.
Press the VOL. DOWN button on the set and the Channel
button (9) on the remote control for more than 2 second to
appear the adjustment mode on the screen as shown in
Fig. 1-1.
THEATER WIDEA I
00 OSD H
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.
5. To display the adjustment screen for AV, CS and HD-
MI mode, press the TV/VIDEO button on the remote
control to set to the AV, CS and HD-MI mode. Press
the VOL.DOWN button on the set and the channel (9)
on the remote control for more than 2 seconds.

ELECTRICAL ADJUSTMENTS

TV
1
Fig. 1-1
D-1
NO. FUNCTION NO. FUNCTION
00 OSD H 20 CORNER
01 CUT OFF 21 C.PARA
02 H.POSI 22 C.SAW
03 V.POSI 23 V.SYMM
04 H. SIZE 24 R.BIAS
05 V. SIZE 25 G.BIAS
06 V. LIN 26 B.BIAS
07 V-EHT 27 R/G.DRV
08 H-EHT 28 B/R.DRV
09 V-BLK P 29 R.BIAS(C)
10 V-BLK S 30 G.BIAS(C)
11 V.CENT 31 B.BIAS(C)
12 V.LIMIT 32 R/G.DRV(C)
13 V.CORR 33 B/R.DRV(C)
14 V.S.CORR 34 R.BIAS(W)
15 EW PARA 35 G.BIAS(W)
16 TRAPEZIUM 36 B.BIAS(W)
17 COR.TOP 37 R/G.DRV(W)
18 COR.BTM 38 B/R.DRV(W)
19 S.CORR 39 R-Y GAIN

2. BASIC ADJUSTMENTS

2-1: CUT OFF
1. Place the set with Aging Test for more than 15 minutes.
2. Set condition is AV MODE without signal.
3. Using the remote control, set the brightness and contrast
to normal position.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select "CUT OFF".
5. Adjust the Screen Volume until a dim raster is obtained.
2-2: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1. Place the set with Aging Test for more than 10 minutes.
2. Receive the gray scale pattern from the Pattern Generator.
3. Using the remote control, set the brightness and contrast
to normal position.
4. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (24) on the remote control to
select "R.BIAS".
5. Press the CH. UP/DOWN button on the remote control to
select the "R.BIAS", "G.BIAS", "B.BIAS", "R/G.DRV", "B/
R.DRV", "R.BIAS(C)", "G.BIAS(C)", "B.BIAS(C)", "R/
G.DRV(C)", "B/R.DRV(C)", "R.BIAS(W)", "G.BIAS(W)",
"B.BIAS(W)", "R/G.DRV(W)" or "B/R.DRV(W)".
6. Adjust the VOL. UP/DOWN button on the remote control
to whiten the R.BIAS(C), G.BIAS(C), B.BIAS(C), R/
G.DRV(C), B/R.DRV(C), R.BIAS(W), G.BIAS(W),
B.BIAS(W), R/G.DRV(W) and B/R.DRV(W)"at each step
tone sections equally.
7. Perform the above adjustments 5 and 6 until the white
color is looked like a white.
NO. FUNCTION
40 R-Y PHASE
41 G-Y GAIN
42 G-Y PHASE
43 BRI.CENT
44 BRI.MAX
45 BRI.MIN
46 CONT.CENT
47 CONT.MAX
48 CONT.MIN
49 COL.CENT
50 COL.MAX
51 COL.MIN
52 SUB CONT
53 TINT
54 SHARP.CENT
55 SHARP.MAX
56 SHARP.MIN
57 TILT.CENT
58 TEST STEREO
59 TEST AUDIO
Fig. 1-2