74 Mhz Clock Duty Adjustment; Chu Y Level Adjustment; Chu C Level Adjustment - Sony HDC1000 Maintenance Manual

3-8-4. 74 MHz Clock Duty Adjustment

Measuring equipment:
Oscilloscope
Input mode: DC
Test point: TP721 (GND: E1)/TR-136 board
Adjusting point: 1RV721/TR-136 board
A = 1.6 ± 0.05 V dc
Specification:

3-8-5. CHU Y Level Adjustment

Preparation
1. Close the lens iris of HDC1550.
Adjustment procedure
2. Measuring equipment:
Oscilloscope
Test point: TP604 (GND: E2)/TR-136 board
TRIG: TP602/TR-136 board
Adjusting point: 1RV601/TR-136 board
A = 3.0 ± 0.05 V p-p
Specification:
3-28

3-8-6. CHU C Level Adjustment

Preparation
1. Close the lens iris of HDC1550.
Adjustment procedure
2. Measuring equipment:
Test point:
A
TRIG:
GND
Adjusting point: 1RV602/TR-136 board
Specification:
A
A
S1
RV761
1
RV601
RV602
TP801
2
3
Oscilloscope
TP605 (GND: E2)/TR-136 board
TP602/TR-136 board
A = 2.0 ± 0.05 V p-p
B C
LV102
E2
TP605
RV102
TP604
LV103
RV103
LV105
RV801
RV105
TP401
TP106
E200
TP201
RV721
LV104
TP721 RV104
E1
TP602
TP603 TP601
TR-136 BOARD (SIDE A)
A
D
RV204
LV210
LV209
TP210
TP209
RV203
LV208
LV207
TP208
TP207
RV201
LV204
LV203
TP204
TP203
RV202
LV206
LV205
TP206
TP205
LV202
TP202
E4
LV101
HDC1000/V1(E)