Stair Case Adjustment; Sd Signal System Adjustment; Vbs Output Level Adjustment - Sony HDCU3300 Maintenance Manual

3-4-2. STAIR CASE Adjustment

Measure : Oscilloscope
Note
Perform temporarily this adjustment after repairing.
When the system is set up, perform the adjustment again
according to the characteristic of the waveform monitor.
Preparation
To be extended : EN-159A/159B board (front side)
Adjustment Procedure
Measuring point : TP305 (E-3)/EN-159A/159B board
Adjusting point : 1RV302 (E-4)/EN-159A/159B board
1RV301 (E-4)/EN-159A/159B board
A = 3.0 ± 0.5 V p-p (1RV302)
Specifications :
B = 0 ± 0.5 V dc (1RV301)
A
Settings after Adjustment
After finishing the adjustment, return the switches to the
original setting.
3-8 (E)

3-5. SD Signal System Adjustment

3-5-1. VBS Output Level Adjustment

Measures : SD waveform monitor (NTSC or PAL)
Note
The adjustment can be performed using VBS on page
"C09" of the configuration menu (Fine-adjustment can be
performed when used as a system.)
Preparation
To be extended : EN-159A/159B board (front side)
Adjustment Procedure
1. Video level adjustment
Measuring point : VBS OUT connector/VDA-64A
Adjusting point : 1RV303 (F-3)/EN-159A/159B
Specifications :
B
GND
[for NTSC]
A B C
TP201
1
EN-B
NTSC
PAL 2
TP206
TP204
3
TP205
TP203
REF IN
UN
LOCK
S201
4
SC PHASE
ADV
DELAY
5
board
board
A = 100 ± 1 IRE
(terminated at 75 Z) (for NTSC)
A = 700 ± 7 mV
(terminated at 75 Z) (for PAL)
[for PAL]
A
D E F G
RV502
TP306
RV303
1
RV501
TP307
RV304
TP305
RV305
TP502
RV302
RV503
1
TP303
1
TP302
RV301
TP304
EN-159A/159B board (A side and panel side)
A
H J
TP202
RV504
TP501
RV506
TP503
RV505
TP301
TP207
HDCU3300/MM (J,E)