Sharp 34N-WF5H, Service Manual

Page: 18 / 87

18
34N-WF5H
No. AdjustingPoint Adjusting Conditions Adjusting Procedure
9 Brightness adjust-
ment
(R/C, JWS address
166) (480P/1080I) Signal: Good local channel
Adjusting point:
Remote Control
(JWS address 166)
Specification:
Normal brightness
level
1. Make this adjustment after the deflection, white
balance, normal mask, purity, convergence and
focus have all been completely adjusted.
2. Set to the video standard condition.
(Picture at MAX, brightness and sharpness at
CENTER)
3. Set the VIEW MODE to STRETCH.
4. Receive the good local channel.
5. Enter the JWS address 166. Adjust the brightness
to the best point.
6. Switch to the 1080I mode. Make the same adjust-
ment.
10 Picture adjustment
(R/C, JWS address
160) Signal: Good local channel
Adjusting point:
Remote Control
(JWS address 160)
Specification:
Normal contrast range
1. Make this adjustment after the Y signal level has
been completely adjusted.
2. Take the same steps 1., 2., 3. and 4. for the bright-
ness adjustment.
3. Enter the R/C address 160. Adjust the picture to
the best point.
11 Sub-screen Pic-
ture adjustment
(R/C, JWS address
250) Signal: NTSC standard half
color bar signal
Adjusting point:
Remote Control
(JWS address 250)
Measuring point: TP1801
Specification: 0.7±0.05 Vp-p
1. In the twin-picture mode. Receive the NTSC stand-
ard half color bar signal for the right-side screen.
2. Connect the oscilloscope to TP1801. Enter the
JWS address 250. Using the VOLUME UP/DOWN
keys, adjust the amplitude between the black level
and white peak to 0.7±0.05 Vp-p.
12 Sub-screen tint
adjustment (R/C,
JWS address 258) Signal: Good local channel
Adjusting point:
Remote Control
(JWS address 258)
Specification:
Normal flesh tone
1. In the twin-picture mode, receive the good local
channel for the right-side screen (sub-screen).
2. Enter the JWS address 258. Using the VOLUME
UP/DOWN keys, visually adjust the tint on the right-
side screen to that on the left-side screen.
3. Switch the channels for the right-side screen. Make
sure the tint is optimum on other channels.
13 Sub-screen color
adjustment (R/C,
JWS address 259) Signal: Good local channel
Adjusting point:
Remote Control
(JWS address 259)
Specification:
Normal color level
1. In the twin-picture mode, receive the good local
channel for the right-side screen (sub-screen).
2. Enter the JWS address 259. Using the VOLUME
UP/DOWN keys, visually adjust the color on the
right-side screen to that on the left-side screen.
3. Switch the channels for the right-side screen. Make
sure the color is optimum on other channels.
14 Deflection distor-
tion, vertical and
horizontal position
adjustments Discussed here are the adjustment procedures for
the STRETCH-mode screen size.
For the other modes, refer to Table B. and go to their
respective procedures.
Make these adjustments for the 480P and 1080I
modes as well.