Service manual

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 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.
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.
Mode CAM ADJ
Measuring instrument Oscilloscope
Subject Gray scale
Measuring point VIDEO OUT
Adjustment address 9C
Adjustment reference 730±10mVp-p
286±10mVp-p(75Ω terminal)
730mVp-p