SECTION 4
SAFETY RELATED ADJUSTMENTS
– 48 –
KP-48V75/53V75/61V75
RM-Y903
RM-Y903
RM-Y903
4-4. +B OVP CONFIRMATION
1. Remove CN651 connector.
2. Connect a voltmeter to TP135V, and TP (PROT) and ground.
3. Connect a 220k
Ω
variable resistor, across pin
3
and pin
5
of IC651 set to maximum value.
4. Supply 120VAC to variable autotransformer.
5. Set PICTURE and the BRIGHTNESS controls to minimum.
6. Gradually turn the 220k
Ω
variable resistor, and check if OVP
works properly when the voltage of TP135V is between
139.0 ~ 151.5V.
(Fig.4-2)
Summary of Contents for KP-48V75 - 48" Color Rear Video Projector
Page 64: ... 97 VM DY Z Board Z ...