Hitachi HCUR700E, Service Manual

Page: 15 / 58

HCU-R700
– 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: 75
Ω).
(1) Adjust VR701 (3) Adjust VR703
Output Cord Connect to VIDEO OUT Output Cord Connect to CR
(2) Adjust VR702 (4) Adjust VR704
Output Cord Connect to VIDEO OUT Output Cord Connect to CB
*Using Disc TDV-540 Title 2 Tr No. 1
Fig. 1 Adjustment of VIDEO OUT Level (Load: 75
Ω
)
Video Output Terminal Adjustment Vol Specification
1. Video Out VR701 1V ± 80mVp-p
2. Video Out VR702 680 ± 40mVp-p
3. CB VR703 480 ± 20mVp-p
4. CR VR704 480 ± 20mVp-p
1V
±
80mVp-p
VIDEO OUT
480
±
20mVp-p
COMPONENT OUT
680
±
40mVp-p
VIDEO OUT
480
±
20mVp-p
COMPONENT OUT