Sony HDCU3300 HD, Руководство по обслуживанию

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3-8 (E)
HDCU3300/MM (J,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
board
Adjusting point : 1 RV303 (F-3)/EN-159A/159B
board
Specifications : A = 100
±
1 IRE
(terminated at 75 Z ) (for NTSC)
A = 700
±
7 mV
(terminated at 75
Z
) (for PAL)
[for PAL] [for NTSC]
A A
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 :
1 RV302 (E-4)/EN-159A/159B board
1
RV301 (E-4)/EN-159A/159B board
Specifications : A = 3.0
±
0.5 V p-p (
1
RV302)
B = 0
±
0.5 V dc ( 1 RV301)
Settings after Adjustment
After finishing the adjustment, return the switches to the
original setting.
B
GND
A
A B C D E F G H J
1
2
3
4
5
S201
RV302
RV301
RV303
RV304
RV305
RV503
RV501
RV502
RV506
RV505
RV504
EN-B
NTSC
PAL
REF IN
UN
LOCK
SC PHASE
ADV
DELAY
1
1
1
TP201
TP204
TP206
TP203
TP205
TP306
TP307
TP305
TP302
TP303
TP304
TP501
TP503
TP502
TP301
TP207
TP202
EN-159A/159B board (A side and panel side)