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Video Adjustment (X14-939, X35-428)
* VIDEO adjustments use an accessory remote controller. (The
selector of the remote controller is set the Audio mode).
1. Enter the test mode : While pressing and holding the Eject
key and SRC key, reset the unit.
2. The main menu screen of the test mode is operated and
changed to the chroma IC adjustment mode.
In this time, adjustment value appears on the displayed
(lower right position).
3. Adjustment value is changed with 8 and 0 key (10 key) for
remote controller.
Adjustment
Measurement
No.
item
1
VCO
TP307A
Free run
2
Chroma
IC303 32PIN
VCO
TE
3
BRIGHT
L 13942296513
(G OUT)
4
CONTRAST
CN850 59pin
(G OUT)
5
BLACK
CN850 59pin
LIMITER
(G OUT)
6
WHITE
LIMITER
(G OUT)
7
Y GAIN
CN850 59pin
(G OUT)
8
GAMMA1
(G OUT)
9
GAMMA2
(G OUT)
10
R SUB
CN850 59pin
BRIGHT
CN850 58pin
(R OUT)
11
B SUB
CN850 59pin
www
BRIGHT
(G OUT)
CN850 60pin
.
(B OUT)
22
ADJUSTMENT
Adjustment
point
part
VR301
Adjust VR301 so that HSY (IC301 9pin) frequency is set to
(X35-4280)
15,734kHz±10Hz (NTSC type), 15,625kHz±10Hz (PAL type).
TEST mode
NTSC : 15.734kHz±50Hz, PAL : 15.625±50Hz
CH16
Connect the TP-HD (R328 between R383) and TP-VD (R380
CN850 59pin
TEST mode
Adjust the amplitude value so that the waveform between the
CH6
1 step signal to the negative 1 step signal is 3.2V±0.05V.
TEST mode
Adjust the amplitude value so that the waveform between the
CH13
8 step signal to the negative 8 step signal is 3.0V±0.05V.
TEST mode
Fixed in adjustment value is 7F.
CH5
CN850 59pin
TEST mode
Fixed in adjustment value is 7F.
CH10
TEST mode
Adjust the amplitude value so that the waveform between the
CH2
pedestal to the 9 step signal is 2.45V±0.05V.
CN850 59pin
TEST mode
Adjust the amplitude value so that the waveform between the
CH11
pedestal to the 2 step signal is 1.1V±0.05V.
CN850 59pin
TEST mode
Adjust the amplitude value so that the waveform between the
CH12
pedestal to the 10 step signal is 3.4V±0.05V.
TEST mode
1. Connect the oscilloscope to 58pin and 59pin between GND
(G OUT)
CH8
2. It is adjusted so that red signal level bigger 0.1V±0.05V than
TEST mode
1. Connect the oscilloscope to 60pin and 59pin between GND
CH9
x
ao
y
2. It is adjusted so that blue signal level bigger 0.1V±0.05V than
i
8
4. Pressing PLAY/PAUSE key is fixed adjustment value of each
item. If you can cancel adjustment value, press again PLAY/
PAUSE key.
5. Different item is chosen for 7 and 9 key (key) for remote
controller. All item adjustment for step 3 to 5.
6. If all chroma adjustment is finished, pressing DIRECT key
that adjustment value is written in EEPROM memory.
Exit for adjustment mode when writing for EEPROM.
Adjustment value
between R381) between to GND line.
Q Q
3
6 7
line.
green signal (for 1step signal).
line.
u163
green signal (for 1step signal).
2 9
9 4
1 3
1 5
0 5
8
2 9
m
co
.
2 8
9 9
Measuring
instrument
Frequency
counter
Frequency
counter
Oscilloscope
9 4
2 8
9 9
Oscilloscope
Oscilloscope
Oscilloscope
Oscilloscope
Oscilloscope
Oscilloscope
Oscilloscope
Oscilloscope
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