![background image](http://html.mh-extra.com/html/canon/d78-5532/d78-5532_service-manual_62458054.webp)
2.6 Gain Adjustment [AV-Video]
1. Receive the 16-step grey scale composite video signal with
Video [Video]
mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TPVIDEOG
” (+) and chassis ground (–).
4. Select item no. “
7
” and adjust the amplitude “a” to be minimum by changing the Data
value.
5. Connect an oscilloscope to test point “
TPVIDEOR
” (+) and chassis ground (–).
6. Select item no. “
8
” and adjust the amplitude “a” to be minimum by changing the Data
value.
7. Connect an oscilloscope to test point “
TPVIDEOB
” (+) and chassis ground (–).
8. Select item no. “
9
” and adjust the amplitude “a” to be minimum by changing the Data
value.
Fig. 3-6
2.7 Gain Adjustment [Component]
1. Receive the 16-step grey scale 1080i component video signal with
Computer1
[Component]
mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TPVIDEOG
” (+) and chassis ground (–).
4. Select item no. “
7
” and adjust the amplitude “a” to be minimum by changing the Data
value.
5. Connect an oscilloscope to test point “
TPVIDEOR
” (+) and chassis ground (–).
6. Select item no. “
8
” and adjust the amplitude “a” to be minimum by changing the Data
value.
7. Connect an oscilloscope to test point “
TPVIDEOB
” (+) and chassis ground (–).
8. Select item no. “
9
” and adjust the amplitude “a” to be minimum by changing the Data
value.
Fig. 3-7
(a)
White Level
(a)
White Level
Part 3: Adjustment
3-11
Summary of Contents for D78-5532
Page 2: ...CANON Multimedia Projector LV X4U D78 5532 LV X4E D78 5533 SERVICE SMANUAL ...
Page 9: ...Part 1 General Information ...
Page 26: ...Part 2 Repair Information ...
Page 43: ...Part 3 Adjustment ...
Page 62: ...Part 4 Troubleshooting ...
Page 79: ...Part 4 Troubleshooting 4 17 AN5870SB RGB SYNC SW IC5201 LM4889 Audio Amplifier IC5031 ...
Page 81: ...Part 4 Troubleshooting 4 19 FA5502 P F Control IC621 VPC3230D Video Decoder IC101 ...
Page 84: ...Part 4 Troubleshooting 4 22 TA1370FG Sync Separator Frequency Counter IC5302 ...
Page 85: ...Part 5 Parts Catalog ...
Page 86: ......
Page 94: ......
Page 100: ...Part 6 Electrical Diagrams ...