Sony TRINITRON KV-27V20 Service Manual page 25

SECTION 3
SAFETY RELATED ADJUSTMENTS
The following adjustments should always be performed when D519,D520,D521,
replacing the following components (*marked with [d@ on the C531,C532,
schematic diagram). R387,R529,R530,R531
(Hold-down operation confirmation) R532,R533,R550,R661
T503
a
Step 1
1. Preparation before confirmation
1) Turn the POWER switch ON, and receive *signal and set * White Picture *PICTURE
the *PICTURE and BRIGHTNESS controls to *TP85 (H. PROT) BRIGHTNESS
adjustment, maximum
dc power supply
[Check Condition]Step 1
*more than 18.0VDC (32/34 inch only)
*more than 21.0VDC (27/29 inch only)
*130 *3° VAC (Power Supply) (except 29V35C/34V35C)
*220 *° VAC (Power Supply) (29V35C/34V35C only)
2) Confirm that the voltage of the check terminal of *TP is
more than *voltage when the set is operating normaly with
*Power supply.
*Digital multimeter
* White Picture
Step 2
[Check Condition]Step 2
2.Confirm that a I ABL.
*1760 100 tA (27/29 inch only)
*2160 £100 LA (32/34 inch only)
*130 #° VAC (Power Supply) (except 29V35C/34V35C)
*220 *3° VAC (Power Supply) (29V35C/34V35C only)
Step 3
4.Using an external DC power supply, apply voltage between TP
85 and groud.
Increase gradually the voltage and confirm that the hold-down
works (Raster disappears) at lower than the voltag obtained
Step 2 mentioned above *voltage.
(Check Condition]Step 3
*lower than 22.05 VDC (32/34 inch only)
*lower than 26.05 VDC (27/29 inch only)
*130 4° VAC (Power Supply) (except 29V35C/34V35C)
*220 *3° VAC (Power Supply) (29V35C/34V35C only)
*130 *3° VAC (Power Supply) (except 29V35C/34V35C)
*220 *3° VAC (Power Supply) (29V35C/34V35C only)