Sharp VL-A111UL Service Manual - Page 33

Basic iris adjustment

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6-7-3. CAM circuit adjustment * Before adjusting the CAM circuit, make sure that the fixed value in 6-3-3 is written in E2PROM. VL-A111U/AH131U VL-AH151U/AH161U 6-7-3-1. Supply voltage check Check that the voltages at the following TL are within the specified range (refer to the supply voltage adjustment/check under VCR circuit adjustment). Measuring point Item TL0137 P-CON_4.9V SPEC 4.9V Measuring point Item TL0142 CAM_15V SPEC 15V TL0138 P-CON_3.1V 3.1V TL0143 CAM_-8V -8V TL0140 P-CON_5.7V 5.7V 6-7-3-2. Basic iris adjustment Mode Measuring instrument Subject Measuring point Adjustment address Adjustment reference CAM ADJ - Not specified - 71 09, 0A, 0B DATA 09 0A 0B Description Hole offset adjustment Iris offset adjustment Iris close adjustment 1) Write ADD:70 DATA:01 and enter the lens system adjustment mode. 2) Write DATA "09" in ADD "71" (and confirmed with "PB" the key). * Press the "STOP" key to reconfirm ADD "71". Adjustment is completed when "FF" is returned to DATA. 3) Write ADD "0A" and "0B" in sequence in the same manner. 4) Write ADD:70 DATA:FF and exit the lens system adjustment mode. 6-7-3-3. Lens adjustment Mode CAM ADJ DATA Description Measuring instrument - 12 Optical wide lens adjustment Subject Subject more than 06 Wide lens infinite adjustment 50m away 08 Tele lens infinite adjustment Measuring point - 0D Zoom tracking adjustment Adjustment address 71 Adjustment reference 12, 06, 08, 0D 1) Expose a subject that is more than 50m away. (Nearby subject less than 50m away should not be in the screen.) 2) Write ADD:70 DATA:01 and enter the lens system adjustment mode. 3) Write DATA "12" in ADD "71" (confirmed with "PB" key). * Press the "STOP" key to reconfirm ADD "71". Adjustment is completed when "FF" is returned to DATA. 4) Write ADD "06", "08" and "0D" in sequence in the same manner. 5) Write ADD:70 DATA:FF and exit the lens system adjustment mode. 6-7-3-4. SYNC level adjustment Mode CAM ADJ Measuring instrument Oscilloscope Subject Measuring point Shielded VIDEO OUT 286±10mVp-p(75Ω terminal) Adjustment address 74 Adjustment reference 286±10mVp-p 1) Terminate VIDEO OUT at 75Ω (preferably with resistance lower than 1%). 2) Use a black subject or shield the subject. 3) Write DATA "00" in ADD "70" and enter the camera adjustment mode. 4) Vary ADD "74" data to adjust it to the specification. 5) After confirming the adjustment in step (4), write ADD:70 DATA:FF and exit the camera adjustment mode. 6-7-3-5. SYNC level adjustment Mode CAM ADJ Measuring instrument Oscilloscope 730mVp-p Subject Gray scale Measuring point VIDEO OUT Adjustment address 9C Adjustment reference 730±10mVp-p 1) Terminate VIDEO OUT at 75Ω (preferably with resistance lower than 1%). 2) Record the gray scale (JIGCHART-1). 3) Write DATA "00" in ADD "70" and enter the camera adjustment mode. 4) Vary ADD "9C" data to adjust it to the specification. 5) After confirming the adjustment in step (4), write ADD:70 DATA:FF and exit the camera adjustment mode. 33

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33
VL-A111U/AH131U
VL-AH151U/AH161U
6-7-3-5. SYNC level adjustment
1) Write ADD:70 DATA:01 and enter the lens system adjustment mode.
2) Write DATA “09” in ADD “71” (and confirmed with “PB” the key).
* Press the “STOP” key to reconfirm ADD “71”. Adjustment is completed when “FF” is returned to DATA.
3) Write ADD “0A” and “0B” in sequence in the same manner.
4) Write ADD:70 DATA:FF and exit the lens system adjustment mode.
1) Expose a subject that is more than 50m away. (Nearby subject less than 50m away should not be in the screen.)
2) Write ADD:70 DATA:01 and enter the lens system adjustment mode.
3) Write DATA “12” in ADD “71” (confirmed with “PB” key).
* Press the “STOP” key to reconfirm ADD “71”. Adjustment is completed when “FF” is returned to DATA.
4) Write ADD “06”, “08” and “0D” in sequence in the same manner.
5) Write ADD:70 DATA:FF and exit the lens system adjustment mode.
6-7-3-3. Lens adjustment
6-7-3. CAM circuit adjustment
* Before adjusting the CAM circuit, make sure that the fixed value in 6-3-3 is written in E
2
PROM.
6-7-3-1. Supply voltage check
Check that the voltages at the following TL are within the specified range (refer to the supply voltage adjustment/check under VCR
circuit adjustment).
6-7-3-2. Basic iris adjustment
Measuring point
Item
SPEC
TL0137
P-CON_4.9V
4.9V
TL0138
P-CON_3.1V
3.1V
TL0140
P-CON_5.7V
5.7V
Measuring point
Item
SPEC
TL0142
CAM_15V
15V
TL0143
CAM_-8V
-8V
Mode
CAM ADJ
Measuring instrument
—
Subject
Not specified
Measuring point
—
Adjustment address
71
Adjustment reference
09, 0A, 0B
DATA
Description
09
Hole offset adjustment
0A
Iris offset adjustment
0B
Iris close adjustment
Mode
CAM ADJ
Measuring instrument
—
Subject
Subject more than
50m away
Measuring point
—
Adjustment address
71
Adjustment reference
12, 06, 08, 0D
DATA
Description
12
Optical wide lens adjustment
06
Wide lens infinite adjustment
08
Tele lens infinite adjustment
0D
Zoom tracking adjustment
6-7-3-4. SYNC level adjustment
Mode
CAM ADJ
Measuring instrument
Oscilloscope
Subject
Shielded
Measuring point
VIDEO OUT
Adjustment address
74
Adjustment reference
286
±
10mVp-p
1) Terminate VIDEO OUT at 75
Ω
(preferably with resistance lower than 1%).
2) Use a black subject or shield the subject.
3) Write DATA “00” in ADD “70” and enter the camera adjustment mode.
4) Vary ADD “74” data to adjust it to the specification.
5) After confirming the adjustment in step (4), write ADD:70 DATA:FF and exit the camera adjustment mode.
1) Terminate VIDEO OUT at 75
Ω
(preferably with resistance lower than 1%).
2) Record the gray scale (JIGCHART-1).
3) Write DATA “00” in ADD “70” and enter the camera adjustment mode.
4) Vary ADD “9C” data to adjust it to the specification.
5) After confirming the adjustment in step (4), write ADD:70 DATA:FF and exit the camera adjustment mode.
Mode
CAM ADJ
Measuring instrument
Oscilloscope
Subject
Gray scale
Measuring point
VIDEO OUT
Adjustment address
9C
Adjustment reference
730
±
10mVp-p
286
±
10mVp-p(75
Ω
terminal)
730mVp-p