Electrical Adjustments - Toshiba MV13P2 Service Manual

1. BEFORE MAKING ELECTRICAL
ADJUSTMENTS
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
On-Screen Display Adjustment
1. Unplug the AC plug for more than 5 seconds to set the
clock to the non-setting state. Then, set the volume
level to minimum.
2. Press both VOL. DOWN button on the set and the
Channel button (9) on the remote control for more than
2 seconds to appear the adjustment mode on the
screen as shown in Fig. 1-1.
00 OSD
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.

ELECTRICAL ADJUSTMENTS

TV
16
Fig. 1-1
NO. FUNCTION
00 OSD H
01 CUT OFF
02 RF AGC
03 V.VCO
04 H.VCO
05 H.PHAS
06 V.SIZE
07 V.SFT
08 R.DRV
09 B.DRV
10 R CUT OFF
11 G CUT OFF
12 B CUT OFF
13 BRI.CENT
14 BRI.MAX
15 BRI.MIN
2. BASIC ADJUSTMENTS
(VCR SECTION)
2-1: PG SHIFTER
1. Connect the connector of AV Jack Jig (JG180) to
CP1003.
2. Connect CH-1 on the oscilloscope to TP1002 and CH-2
to Hot side of JG180 Video out Jack.
3. Playback the alignment tape.
4. Press both VOL.DOWN button on the set and the
Channel button (5) on the remote control simultaneously
to set tracking to center.
5. 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:)
6. Press the VOL. DOWN button on the set and the
channel button (3) on the remote control simultaneously
until the indicator REC disappears.
7. 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
8. Tracking +/- button until the arising to the down of Head
Switching Pulse becomes 6.5 ± 0.5H.
(Refer to Fig. 2-1-A, B)
9. Press the Tracking Auto button.
D3-1
NO. FUNCTION
16 CONT.CENT
17 CONT.MAX
18 CONT.MIN
19 COL.CENT
20 COL.MAX
21 COL.MIN
22 TINT
23 SHARP
24 FM.LVL
25 LVL
26 SEP1
27 SEP2
28 T.MONO
29 T.STE
CH-2
6.5H
CH-1
Fig. 2-1-A
Fig. 1-2