Hitachi HCUR700UC Service Manual page 15

A D J U S T M E N T S
Adjusting and Checking the Electrical Section
Measuring instruments needed for the adjustments
(1) Oscilloscope
(2) DC voltmeter
(3) Adjustment screwdriver
(4) Test disc
• TDV-540 Title2 Tr No. 1
1. Adjustment of + 5V Voltage
Adjust R502 so that the voltage of PG101 Pin6 (+5V) should be within Limit of 5.0±0.05V.
2. Adjustment of VIDEO OUT Level (Load: 75Ω).
Video Output Terminal
1. Video Out
2. Video Out
3. CB
4. CR
(1) Adjust VR701
1V ± 80mVp-p
Output Cord Connect to VIDEO OUT
(2) Adjust VR702
680 ± 40mVp-p
Output Cord Connect to VIDEO OUT
Adjustment Vol
VR701
VR702
VR703
VR704
VIDEO OUT
VIDEO OUT
*Using Disc TDV-540 Title 2 Tr No. 1
Fig. 1 Adjustment of VIDEO OUT Level (Load: 75Ω)
– 15 –
Specification
1V ± 80mVp-p
680 ± 40mVp-p
480 ± 20mVp-p
480 ± 20mVp-p
(3) Adjust VR703
480 ± 20mVp-p
Output Cord Connect to CR
(4) Adjust VR704
480 ± 20mVp-p
Output Cord Connect to CB
HCU-R700
COMPONENT OUT
COMPONENT OUT