KVT-M700
14
3. X25 Circuit Adjustment Specification (M : For the Other Markets)
Item
Adjustment method/Adjustment value
Conditions
1. Video detection coil
adjustment
L303
1. Turn VR301 [RF-AGC] fully to the right.
2. Apply DC2.0V to TP [IF AGC] (IC300 pin36).
3. Feed fo=38.0MHz, Mod=1kHz, AM60%, Level=100dB
µ
into TP [IF]
(A100 pin8).
4. Observe the TP [VIDEO] (IC300 pin8) waveform on an oscilloscope and
adjust L303 for maximum level.
Maximum
･
No ANT signal
･
If the waveform is clipped,
slightly increase the DC
voltage.
･
AC range
2. Audio detection coil
adjustment
L300
1. Turn VR301 [RF-AGC] fully to the right.
2. Feed fo=31.5MHz, No Modulation, Level=94dB
µ
into TP [IF] (A100 pin8).
3. Connect a voltmeter to TP [SIF] (both ends of R314) and adjust L300 fof
0V
±
0.01V.
･
No ANT signal
3. S-METER adjustment
VR300
4. RF AGC adjustment
VR301
1. Turn VR301 [RF-AGC] fully to the right.
2. Feed a 30dB
µ
CHINA 9CH color bar RF signal into the ANT input terminal.
3. Audio (P/S ratio -6dB) no modulation.
4. Connect a voltmeter to CN300 and adjust VR300 [SMET] so it reads
3.5V
±
0.05V.
5. Set the RF signal to 70dB
µ
and adjust VR301 [RF-AGC] so that the
voltmeter connected to CN300 reads 4.8V
±
0.05V.
･
Postpone adjusting VR301
to prevent AGC having effect
at 30dB
µ
.
･
Ensure the RF AGC
adjustment is performed
after the S-METER
adjustment.
5. Diversity free run
frequency adjustment
VR400
1. Connect a frequency counter to CN400.
2. Using the remote control unit TV/NAVI button, switch to adjustment mode.
3. Adjust VR400 [15kHz] so as to obtain 15625
±
100Hz.
･
No ANT signal
･
Test mode
4. X35 Circuit Adjustment Specification
Item
Adjustment method/Adjustment value
Conditions
1. Screen display start
position confirmation
･
With a monoscope display confirm that the left and right positions are equal.
If they are slightly off, adjust for left/right equality with VR200.
If there is a big discrepancy, redo from the X35 adjustment.
・
Monoscope
2. Flicker adjustment
･
Adjust VR302 to minimize flicker (60Hz component)
・
Input signal
Composite input
Grey RASTA
(white 30~50%)
・
ZOOM mode
・
Set to AC range
・
Flicker jig
3. Flicker confirmation
･
Confirm there is no flickering when setting to ZOOM or CINEMA mode.
5
．
Attention
When LCD ASSY or touch panel switch ASSY is exchanged, X35 Circuit Adjustment and Touch Adjustment are adjusted together, too.
2. X25 Circuit Adjustment Specification (E : For European Markets)
Item
Adjustment method / Adjustment value
Conditions
1. Diversity video detection
coil adjustment
L303
1. Input RF signal 70dB
µ
9CH stair step into the ANT input terminal.
2. Observe the TP [VIDEO] (IC300 pin8) waveform on an oscilloscope and
adjust L303 so that the edges of sync chip and pedestal are horizontal.
･
PAL B/G
･
Turn color off.
2. Audio detection coil
adjustment
L300
1. Input RF signal 70dB
µ
9CH bar into the ANT input terminal.
2. Connect a voltmeter to TP [SIF] (both ends of R314) and adjust L300 for
0V
±
0.01V.
･
PAL B/G
･
P/S ratio 10dB
3. Diversity free run
frequency adjustment
VR400
1. Connect a frequency counter to CN400.
2. Using the remote control unit TV/NAVI button, switch to adjustment mode.
3. Adjust VR400 [15kHz] so as to obtain 15625
±
10Hz.
･
No ANT signal
･
Test mode
NG
OK
NG
ADJUSTMENT
