JVC TV 13142 User manual

No. 51810
Mar. 2001
TV-13142
TV-13142W
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
TV-13142
TV-13142W
SERVICE MANUAL
TV/VCR COMBO

TV-13142
TV-13142W
NOTE FOR THE REPLACING OF MEMORY IC
If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to
ensure correct data settings while making reference to TABLE 1.
NOTE: Initial Data setting will not be possible if clock has been set. To reset clock, either unplug AC cord and allow
at least 5 seconds before Power On.
88 1B C2 63 43 14 34 09 5F 38
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +FINI
B6 95 93 00 00 D0 05 85 00
06 29 01 15 10 60 32 3A BA B5
28 29 2A 2C 2E 30 32 34 36 38
43 45 46 47 48 49 4A 4B 4C
38 92 19 4E 26 1700
10 9E A9 54 04 42 06 04
20 10 15 20 25 26 27
30 3A 3C 3E 40 41 42
40 44 4D 4E 4F 50 51 52
53 55 56 57 58 59 5A 5B 5C
63 64 66 69 6D 74 79 7C 7E 7F
50 54 5D 5E 5F 60 61 62
60 --- --- --- --- --- ---
3.
4.
5.
6.
7.
8.
The unit will now have the correct DATA for the new MEMORY IC.
Table 1
1.
2.
Fig. 1
ADDRESS is now selected and should "blink". Using the SET + or - keys on the remote, step through the ADDRESS until
required ADDRESS to be changed is reached.
Press ENTER to select DATA. When DATA is selected, it will "blink".
Again, step through the DATA using SET + or - until required DATA value has been selected.
Pressing ENTER will take you back to ADDRESS for further selection if necessary.
Repeat steps 3 to 6 until all data has been checked.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
Enter DATA SET mode by setting VOLUME to minimum.
While holding down VOLUME button on front cabinet, press key 6 on remote control simultaneously.
ADDRESS and DATA should appear as FIG 1.
INIT 00 83
0010
0003
POWER ON
PLAY/REC
ADDRESS DATA

TV-13142
TV-13142W
ELECTRICAL ADJUSTMENTS
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.
Inferior silicon grease can damage IC's and transistors.
When replacing IC's and transistors, use only specified
silicon grease (YG6260M).
Remove all old silicon before applying new silicon.
(VCR SECTION)
2-1: PG SHIFTER
1.
2.
3.
4.
Connect CH-1 on the oscilloscope to TP1002 and CH-2
to pin 4 of CP1003.
Playback the alignment tape.
Press and hold the Tracking-Auto button on the remote
control more than 2 seconds to set tracking to center.
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:)
5.
6.
7.
Press the VOL. DOWN button on the set and the
channel button (3) on the remote control simultaneously
until the indicator REC disappears.
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)
Press the Tracking Auto button.
6.5H
6.5H
Fig. 2-1-B
CH-2
CH-1
CH-1
CH-2
Fig. 2-1-A
2. BASIC ADJUSTMENTS
2-2: VCO FREERUN
1.
2.
3.
4.
5.
6.
Receive the VHF HIGH.
Place the set with Aging Test for more than 10 minutes.
Connect the digital voltmeter between the pin 5 of
CP351 and the pin 1 (GND) of CP351.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (03) on the remote control to
select "VIF VCO".
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.5V.
After the 2.5V adjustment, countdown the VIF VCO step
No. by 1 step with the VOL. DOWN button.
On-Screen Display Adjustment
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.
Press the VOL. DOWN button on the set and the
Channel button (9) on the remote control simultaneously
to appear the adjustment mode on the screen as shown
in Fig. 1-1.
1.
2.
Fig. 1-1
Use the Channel UP/DOWN button or Channel button
(0-9) on the remote control to select the options shown
in Fig. 1-2.
Press the MENU button on the remote control to end
the adjustments.
3.
4.
FUNCTION
OSD H
CUT OFF
RF DELAY
VIF VCO
H VCO
H PHASE
V SIZE
V SHIFT
R DRIVE
B DRIVE
R CUT OFF
G CUT OFF
B CUT OFF
NO.
00
01
02
03
04
05
06
07
08
09
10
11
12 Fig. 1-2
FUNCTION
BRIGHTNESS
CONTRAST
COLOR
TINT
SHARPNESS
FM LEVEL
LEVEL
SEPARATION 1
SEPARATION 2
TEST MONO
TEST STEREO
X-RAY TEST
NO.
13
14
15
16
17
18
19
20
21
22
23
24
TV
00 OSD 15

TV-13142
TV-13142W
ELECTRICAL ADJUSTMENTS
2-3: RF AGC
1.
2.
3.
4.
Receive the VHF HIGH (63dB).
Connect the digital voltmeter between the pin 5 of
CP351 and the pin 1 (GND) of CP351.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (02) on the remote control to
select "RF DELAY".
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.9 ±0.1V.
(TV SECTION)
2-4: CONSTANT VOLTAGE
1.
2.
3.
4.
Connect the digital voltmeter to the TP601.
Set condition is AV MODE without signal.
Using the remote control, set the brightness and contrast
to normal position.
Adjust the VR502 until the digital voltmeter is 135 ±0.5V.
2-8: HORIZONTAL PHASE
1.
2.
3.
4.
Receive the center cross signal from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (05) on the remote control to
select "H PHASE".
Press the VOL. UP/DOWN button on the remote
control until the right and left screen size of the vertical
line becomes the same.
1.
2.
3.
4.
5.
6.
Adjust the unit to the following settings.
R CUT OFF=128, G CUT OFF=128, B CUT OFF=128,
BRIGHTNESS=128, CONTRAST=100
Place the set with Aging Test for more than 15 minutes.
Set condition is AV MODE without signal.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select "CUT OFF".
Adjust the Screen Volume until a dim raster is obtained.
2-5: CUT OFF
2-6: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1.
2.
3.
4.
5.
6.
7.
8.
Place the set with Aging Test for more than 15 minutes.
Receive the color bar pattern.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (10) on the remote control to
select "R CUT OFF".
Using the VOL. UP/DOWN button on the remote
control, adjust the R CUT OFF.
Press the CH. UP/DOWN button on the remote control
to select the "R DRIVE", "B DRIVE", "G CUT OFF" or
"B CUT OFF".
Using the VOL. UP/DOWN button on the remote
control, adjust the R DRIVE, B DRIVE, G CUT OFF or
B CUT OFF.
Perform the above adjustments 6 and 7 until the white
color is looked like a white.
2-7: FOCUS
1.
2.
3.
4.
Receive the monoscope pattern.
Using the remote control, set the brightness and
contrast to normal position.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus Volume until picture is distinct.
2-9: VERTICAL SHIFT
1.
2.
3.
4.
Receive the center cross signal from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (07) on the remote control to
select "V SHIFT".
Press the VOL. UP/DOWN button on the remote
control until the horizontal line becomes fit to the notch
of the shadow mask.
2-10: VERTICAL SIZE
1.
2.
3.
4.
5.
Receive the cross hatch signal from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (06) on the remote control to
select "V SIZE".
Press the VOL. UP/DOWN button on the remote
control until the rectangle on the center of the screen
becomes square.
Receive a broadcast and check if the picture is normal.
2-11: SUB BRIGHTNESS
1.
2.
3.
4.
5.
6.
Receive the monoscope pattern.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (13) on the remote control to
select "BRIGHTNESS".
Press the VOL. UP/DOWN button on the remote
control until the white 10% is starting to be visible
Receive the monoscope pattern. (Audio Video Input)
Press the INPUT button on the remote control to set to
the AV mode. Then perform the above adjustments
2~4.
2-12: SUB CONTRAST
1.
2.
3.
4.
5.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (14) on the remote control to
select "CONTRAST".
Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "102"
Press the INPUT button on the remote control to set to
the AV mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (14) on the remote control.
Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes "100"

TV-13142
TV-13142W
ELECTRICAL ADJUSTMENTS
2-13: SUB TINT
1.
2.
3.
4.
5.
6.
7.
2-15: OSD HORIZONTAL
1.
2. Activate the adjustment mode display of Fig. 1-1. Press the VOL. UP/DOWN button on the remote
control until the difference of A and B becomes
minimum. (Refer to Fig. 2-4)
B
A
TV
00 OSD 15
Fig. 2-4
Receive the color bar pattern. (RF Input)
Connect the synchro scope to TP801.
Using the remote control, set the brightness, contrast,
color and tint to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (16) on the remote control to
select "TINT".
Press the VOL. UP/DOWN button on the remote control
until the waveform becomes as shown in Fig. 2-2.
Receive the color bar pattern. (Audio Video Input)
Press the INPUT button on the remote control to set to
the AV mode. Then perform the above adjustments 2~5.
Fig. 2-2
2-14: SUB COLOR
1.
2.
3.
4.
5.
6.
7.
8.
Receive the color bar pattern. (RF Input)
Connect the synchro scope to TP803.
Using the remote control, set the brightness, contrast,
color and tint to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (15) on the remote control to
select "COLOR".
Adjust the VOLTS RANGE VARIABLE knob of the
oscilloscope until the range between white 100% and
0% is set to 4 scales on the screen of the oscilloscope.
Press the VOL. UP/DOWN button on the remote control
until the red color level is adjusted to 110% of the white
level. (Refer to Fig. 2-3)
Receive the color bar pattern. (Audio Video Input)
Press the INPUT button on the remote control to set to
the AV mode. Then perform the above adjustments 2~6.
100%
White 0%
Red Level
White 100% Fig. 2-3