Kenwood DDX7015 Service Manual page 25

Chroma IC Adjustment (X14-939)
No. Adjustment Item
1 DC/DC SW frequency
2 DVD output level
3 Chroma
3-A Chroma VCO
3-B Brightness
3-C Contrast
3-D Black limiter
3-E White limiter
3-F Y GCA (Brightness gain)
3-G Gamma 1
3-H Gamma 2
3-I R sub-brightness
3-J B sub-brightness
3-K R sub-contrast
3-L B sub-contrast
3-M V-COM frequency width
• For adjustment methods on 3-A~3-B, refer to chroma adjustment method.
• As for remote controller operation method, refer to Remote Controller Operation Method.
Remote Controller Operation Method at Chroma
Adjustment Test Mode
Remote controller uses is the TV/NAVI remote controller AU-
DIO mode.
1. While pressing EJECT+SRC on the Unit (X14), press RE-
SET key to get into the Test Mode.
2. By operating on the TEST MODE MENU screen, get into
the Chroma ADJ mode.
At this time, on the upper left corner of the screen [CH : 16
VCO_FREERUN, VAL : 80] OSD display is made. HEX dis-
play.
3. Use 8, 0 on the 10 key to change the setting value. The, the
VAL number on upper-left corner of the screen changes.
ADJUSTMENT
Adjustment Method
Connect a frequency counter to the No.8 pin of IC102 (Check land). TP925
Adjust frequency with VR1(The frequency will be notified later.)
In the replay mode, replay TDV-540 Title 2 Chapter 6.
Observe the checkland with an oscilloscope and set the output
level to 2Vp-p.
Get into Chroma Adjustment Mode in the Test Mode.
While operating with remote controller, measure the check land
with frequency counter.
While operating with remote controller, measure the check land
with frequency counter and observe the waveform.
DDX7015/7025/7035
DDX7045/7065
Measurement
Locations (X14)
TP100 (GND)
TP653
TP654 (GND)
TP303
TP944 (GND)
TP885
TP944 (GND)
TP884
TP944 (GND)
TP886
TP944 (GND)
TP884
TP944 (GND)
TP886
TP944 (GND)
TP869
TP944 (GND)
4. Press PLAY/PAUSE key and confirm on the setting value.
When confirmed, [CH : 16 VCO_FREERUN, VAL : 80] the
color changes.
When releasing the setting, press on PLAY/PAUSE key
again. When released, the color changes.
5. Use 7, 9 keys on the 10 key to set the next one. The CH
value changes in the upper-left corner. Repeat the same
for Item 3 to 5.
6. When all adjustments are complete, press DIRECT key,
which writes the adjustment values to E2PROM. At the same
time, it is possible to move out of the Chroma Adjustment
mode.
Conditions
Input signal
: None
10 step NTSC
input to X34 AV IN
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