Kenwood KVT-827DVD, Руководство по обслуживанию

Страница: 40 / 116

40
KVT-817DVD/827DVD/827DVDY
KVT-837DVD/847DVD/867DVD
ADJUSTMENT
●
Adjustment item
1. Chroma IC adjustment (X14)
(A remote controller is used for adjustment, while confirm-
ing on the waveform with an oscilloscope.)
2. Freerun adjustment (X35)
(A variable resistor is used for adjustment while confirming
on the waveform with an oscilloscope.)
3. Flicker adjustment
(A remote controller is used for adjustment, while confirm-
ing on the waveform with an oscilloscope.)
4. Screen position adjustment
(A touch panel is used for adjustment, while confirming the
screen.)
5. Touch Panel Adjustment
(A touch panel is used for adjustment.)
1. Chroma IC Adjustment Procedure (X14)
1. While pressing on the [ATT] + [SRC] keys on the unit, reset
to enter the Test Mode.
2. Press [DIRECT] key on the TV remote controller to get into
the Chroma IC Adjustment mode.
→
At this point “CH : 16 VCO_FREERUN VAL 80” is dis-
played on upper left corner. (VAL value is displayed in HEX.)
3. Perform adjustments in Tables A~M in the order of a~c, one
by one.
a. Use [8] and [0] of 10Key to change the setting value.
→
The values in the VAL on the upper left corner of screen.
b. Press [PLAY/PAUSE] key to confirm the setting values.
→
When confirmed, the color of “CH : 16 VCO_FREERUN
VAL 80” changes.
Press [PLAY/PAUSE] key once more to release.
c. Use [7] and [9] of 10Key to move to the next setting.
→
The CH value in the upper left corner of screen changes.
4. Press [DIRECT] key to write data to E2PROM.
5. Press [DIRECT] key again to move out of Chroma Adjust-
ment mode.
∗
Conduct this in AUDIO mode using TV/NAVI remote con-
troller.
Adjustment Item
Test Mode
Adjustment Method
Adjustment Value
Condition
Display (Temporary)
A Chroma VCO CH : 16 Connect TP: HD between R249 and R250 and TP: VD NTSC type Input signal
Adjustment between R248 and R251 to GND. Measure TP: TC_HD of 15.734
±
50Hz : None
IC237 32 pin with a frequency counter. PAL type Input signal
15.625
±
50Hz : 10 STEP (NTSC)
F Y GCA CH : 2 Monitor waveform of 59 pin TP: VG of CN905 with an 2.6V
±
0.05V 1Vpp V/S ratio
(Brightness Gain) oscilloscope and adjust the oscillation width of forward : 7:3 (75
Ω
terminated)
Adjustment rotation-side pedestal and forward rotation-side Step 10. X34 AVIN input
B Brightness CH : 6 Monitor waveform of 59 pin TP: VG of CN905 with an 3.2V
±
0.05V Oscilloscope range
Adjustment oscilloscope and adjust the oscillation width of forward : 500mV/DIV
rotation-side Step 1 and reverse rotation-side Step 1. AC
C Contrast CH : 13 Monitor TP: VG waveform of 59 pin of CN905 with an 3.0V
±
0.05V
Adjustment oscilloscope and adjust the oscillation with of forward
rotation-side Step 8 and reverse rotation-side Step 8.
D Black Limiter CH : 5 Maintain and confirm 7F and move on to the next step. 7F
Adjustment
E White Limiter CH : 10 Monitor waveform of 59 pin TP: VG of CN905 with an 3.2V
±
0.05V
Adjustment oscilloscope and adjust the oscillation width of forward If lower than 3.2V,
rotation-side Step 9 and reverse rotation-side Step 9. finalize with 7F.
(However, 2.7V
or less is NG.)
www. xiaoyu163. com
QQ 376315150
9 9
2
8 9
4 2
9 8
TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299