C Level Adjustment; Agc Initial Value Adjustment - Canon ZR70 MC A Service Manual

2-7-3 C LEVEL Adjustment

TP/TRIG. VIDEO OUT
M. EQ. Oscilloscope
SPEC. 710 ± 20 [mV]
Procedure)
(1) Select the card VTR mode.
(2) Referring to the table shown below, carry out C level adjustment.
Repeat steps 2) to 4) so that the level range shown at the right
will be attained.
* If the tape mode is selected, a delay may occur in re-
sponse.
ST EP PROCEDURE
C LEVEL
1 1) Make the setting shown at right.
2) For adjustment, change data properly.
3) Perform storing.
(press the PAUSE button.)
4) Make the setting shown at right.
5) Perform storing.
(press the PAUSE button.)

2-7-4 AGC Initial Value Adjustment

SIGNAL COLOR BAR
MODE E-E (ANALOG LINE IN)
SPEC. Automatic writing
Procedure)
(1) Input a color bar signal to the analog line circuit from the pattern generator.
(2) Carry out AGC initial value adjustment according to the table shown below.
ST EP PROCEDURE
AGC INIT IAL
1 1) Make the setting shown at right.
2) Perform storing.
(press the PAUSE button.)
MONIT OR
CS Function MD ADDR DT
0 10 ST 000E ADJ Green raster is output.
"ADJ"
↑ ↑ ↑ ↑
↑ ↑ RD ↑ ↑
ST
↑ ↑ ↑ ↑
RD
↑ ↑ ↑ ↑
MONIT OR
CS Function MD ADDR DT
0 08 ST 0004 --
WR
↑ ↑ ↑ ↑
RD
↑ ↑ ↑ ↑
4-45
ZR70 MC A, ZR65 MC A, ZR60 A
CHAPTER 4. DISASSEMBLING ADJUSTMENT
710 ± 20mV
Fig.4-30
Microcomputer operation
Adjustment data reflected
Check level.
Adjustment is completed.
Microcomputer operation
Automatic adjustment is in progress.
Automatic adjustment is completed.