Dynamic Focus/Dynamic Quadra-Pole Data - Sony KV-30XBR910 Service Manual

2-4.1. DYNAMIC FOCUS/DYNAMIC QUADRA-POLE DATA

Normally, no adjustments are necessary for these systems. If for some reason the data is lost, use the initial data.
2-5. SCREEN (G2)
1. Input composite white fi eld into Video 1.
2. Set to service mode and adjust as follows:
(Fig 1)
CXA2170P-2 PICO 1 → 0
2-6. PICTURE QUALITY ADJUSTMENTS
Preparation:
• Set PRO MODE (Reset).
1. Input signal (480i Composite):
• Color Bar Video 75 IRE (White) 75% modulation 7.5% Set-up.
• Color Bar RF 75 IRE (White) 75% modulation 7.5% Set-up.
2-6.1. VIDEO INPUT - SUB CONTRAST
ADJUSTMENT
Preparation:
• Input a Color Bar signal to VIDEO 1 (75 IRE 75%).
• Set picture mode: Single (PRO MODE Reset).
• Picture: Max
1. Set to Service Mode and adjust as follows:
2170P-2
NO. Name Control Function
01 RGBS R ON
2. Connect oscilloscope to Pin 1 of CN9001 (R.DRV) on the C Board.
3. Adjust contrast according to the service mode item: SPIO.
2170-P4
NO. Name
04 SPIO
Operation Procedure
1) In Full mode, apply changes in
Fig 1
2) Mount G2 adjustment jig.
Adjust Cathode voltage if the
standard is not met. Standard
varies by CRT size.
3) Adjust G2 by Flyback
Transformer (T8001).
4) Return data changes in 1) to
original condition.
Avg. Data
4
Control Function
SUB-CONT
Standards
170 ± 5 (Vpc)
VR1
(KV-30XBR910/34XBR910) = 1.60 ± 0.05 Vpp
4. Write data from Step 3 above, into memory.
2-6.2. VIDEO INPUT - SUB HUE/SUB COLOR
ADJUSTMENT
Preparation:
• Input a Color Bar signal to VIDEO 1 (75 IRE 75%).
• Set picture mode: Single (PRO MODE Reset).
• Picture: Max
1. Set to Service Mode and adjust as follows:
2170P-2
NO. Name
01 RGBS
2. Connect an oscilloscope to Pin 5 of CN9001 (B. DRV) on the C Board.
3. Adjust color according to Service Mode for SCLO.
— 17 —
KV-30XBR910/34XBR910
Notes
30XBR & 34XBR
white
black
VR2
GND
VR
Control Function Avg. Data
R ON 7