JVC AV-56WP30 Service Manual page 48
Rear projection television
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Also See for AV-56WP30:
- User manual (68 pages) ,
- User manual (68 pages) ,
- User manual (69 pages)
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AV-56WP30
MTS ADJUSTMENT
Measuring
Item
Instrument
MTS INPUT
Remote
control unit
LEVEL
check
MTS STEREO
TV audio
multiplex signal
VCO
gener ator
adjustment
Frequency
counter
Remote
control unit
MTS SAP
TV audio
multiplex signal
VCO
gener ator
adjustment
Frequency
counter
Remote
control unit
MTS FILTER
TV audio
multiplex signal
check
gener ator
Oscilloscope
Remote
control unit
48
Test point
Ad justment Item
A02 : IN LEVEL
A03 : FH MONITOR
AUDIO OUT
R output
A04 :STEREO VCO
A09 : 5FH MON.
S2
A10 : SAP VCO
Connector
3-pin:GND
4-pin:SOA
[RECEIVER
PWB]
AUDIO OUT R
output
S2
A05 : PILOT
Connector
A06 : FILTER
2-pin:R
[RECEIVER
PWB]
No. 52007
Description
1. Select 1.PICTURE / SOUND from SERVICE MENU.
2. Select the A02 ＜ IN LEVEL ＞ with FUNCTION (
key.
3. Verify that the A02＜IN LEVEL＞ is set at its initial
setting value.
1. Receive the RF signal (non-modulated s ound signal)
from the antenna terminal.
2. Select the A03＜FH MONITOR＞ with FUNCTION (
) key, and change the setting value from 0 to 1.
▼
3. Connect the frequency c ounter to R output pin of the
AUDIO OUT.
4. Select the A04 ＜ STEREO VCO ＞ with FUNCTION
(
/
) key.
▲
▼
5. Set the initial s etting value of the No.4 STEREO VCO
with the F UNCTION ( / ) key.
6. Adjust the A04 ＜ STEREO VCO ＞
frequenc y counter will display 15.73kHz ± 0.1kHz.
*
The frequency counter indic ation should be stable.
7. Select the A03＜FH MONITOR＞ with FUNCTION (
▼
) key, and reset the s etting value from 1 to 0.
1. Receive the RF signal (non-modulated sound signal)
from the antenna terminal.
2. Connect between pin ④ of S2 connec tor and GND (pin
③ of S2 connector) through 1MΩ resistor.
3. Select the A09＜5FH MON＞ with FUNCTION (
key, and reset the setting value from 0 to 1.
4. Connect the frequency c ounter to R output pin of the
AUDIO OUT.
5. Select the A10＜SAP VCO＞ with FUNCTION (
key.
6. Set the initial setting value of A10＜SAP VCO＞ with
of FUNCTION ( / ) key.
7. Adjust the A10 ＜ SAP VCO ＞ so that the frequency
counter will display 78.67kHz±0.5kHz.
*
The frequency counter indic ation should be stable.
8. Select the A09＜5FH MON＞ with FUNCTION (
key, and reset the s etting value from 1 to 0.
1. Receive the RF s ignal (MTS pilot signal) from the
antenna terminal.
2. Select the A05＜PILOT＞ with FUNCTION (
and res et the setting value from 1 to 0.
3. Connect the oscilloscope to ② pin of S2 connec tor.
4. Select the A06＜FILT ER＞ with FUNCTION (
5. Adjust the A06＜FILT ER＞ s o that the waveform will
because minimum.
6. Select the A05＜PILOT＞ with FUNCTION (
and res et the setting value from 1 to 0.
▲
/
▼
)
/
▲
so that the
/
▲
/
)
▲
▼
/
)
▲
▼
▲
/
▼
)
/
) key,
▲
▼
/
) key.
▲
▼
/
) key,
▲
▼
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