17
KV-27HS420/29DRC420/30HS420/32HS420/34HS420/36HS420
KV-27HS420/29DRC420/30HS420/32HS420/34HS420/36HS420
2-5. SCREEN (G2)
1. Input composite white fi eld into Video 1.
2. Set to service mode and adjust as follows:
(Fig. 1)
Opeartion Procedure
Standards
Notes
1) In Full mode, apply changes in Fig. 1
CXA2170P-2 PICO 1-> 0
2) Mount G2 adjustment jig. Adjust Cathode
170 +/- 5 (V
DC
)
29RSN, 32RVEN
voltage if the standard is not met. Standard
34RSN, 36RV2, 38RSN
varies by CRT size.
175 +/- 5 (V
DC
)
3) Adjust G2 by Flyback transformer (T8001).
4) Return data changes in 1) to original condition.
3. Adjust contrast according to the service mode item: SPIO.
white
black
GND
VR2
VR1
VR
(27HS/29HS) = 1.84 ± 0.05 Vpp
(30HS) = 1.92 ± 0.05 Vpp
(32HS) = 1.92 ± 0.05 Vpp
(34HS) = 1.92 ± 0.05 Vpp
(36HS) = 2.00 ± 0.05 Vpp
4. Press MUTING then ENTER to write into memory.
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 (Full) (PRO MODE Reset).
• Picture:
Max
1. Set to Service Mode and adjust as follows:
2. Connect oscilloscope to Pin 1 of CN9001 (R.DRV) on the CH Board.
NO. Name
Control Function
02 SCON
SUB-CONT
2103-1
NO. Name
Control Function
Avg. Data
01 RGBS
R ON
4
2170P-2
