Circuit Adjustments - Sanyo PLC-EF60 Service Manual

Electrical Adjustments

2. Circuit Adjustments

CAUTION: The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the following
adjustments except requiring the readjustments in servicing otherwise it may cause loss of performance
and product safety.
[Adjustment Condition]
● Input signal
Video signal ......................... 1.0Vp-p/75Ω terminated, 16 steps gray scale
Computer signal ................... 0.7Vp-p/75Ω terminated, 16 steps gray scale
Component Video signal ...... 0.7Vp-p/75Ω terminated, 16 steps gray scale
● Picture control mode "STANDARD" mode unless otherwise noted.
Note:
* Please refer to "Service Adjustment Menu Operation" for entering the ser-
vice mode and adjusting the service data.
z Dimmer Control Check
1
Receive the 100% whole-black computer signal with
INPUT 2 [RGB] mode.
2
Enter the service mode.
3
40
Select group no. " ", item no. "
1
to " ".
4
1
Set item no. " " and data value to "
5
In 90 seconds after the Lamp-on, set item no. "
0
data value to " " and check that the white part of the
projected image (on screen menu) becomes dark.
6
1
Set item no. " " and data value to "
the white part of the projected image (on screen menu)
brighten up.
(Composite video signal)
pattern
(Component video signal with 480p, 575p,
720p or 1080i format)
0
" and set data value
15
".
1
" and
15
" and check that
- 43 -
16 steps gray scale pattern
White 100%
x Fan Control adjustment
Fan control adjustment-1 (Normal mode)
1
Enter the service mode, select group no. "
1
no. " " and set data value to "
2
Connect a digital voltmeter to test point "
on the POWER(DC) board and chassis ground (-). Se-
5
lect item no. " " and change data value to adjust volt-
13.5
age to be ±0.1V. Select item no. "
data value to adjust voltage to be
3
140
Select group no. " ", item no. "
2
to " ".
4
Connect a digital voltmeter to test point "
and chassis ground (-). Select item no. "
data value to adjust voltage to be
6
item no. " " and change data value to adjust voltage to
10.5
be ±0.1V.
Fan control adjustment-2 (Dim mode)
1
140
Select group no. " ", item no. "
3
to " ".
2
Connect a digital voltmeter to test point "
and chassis ground (-). Select item no. "
data value to adjust voltage to be
4
item no. " " and change data value to adjust voltage to
11.0
be ±0.1V.
3
140
Select group no. " ", item no. "
4
to " ".
4
Connect a digital voltmeter to test point "
and chassis ground (-). Select item no. "
data value to adjust voltage to be
6
item no. " " and change data value to adjust voltage to
9.5
be ±0.1V.
Black 100%
140
", item
0
".
TP3601
" (+)
6
" and change
7.5
±0.1V.
1
" and set data value
FAN_C
" (+)
5
" and change
13.2
±0.1V. Select
1
" and set data value
FAN_D1
" (+)
5
" and change
13.0
±0.1V. Select
1
" and set data value
FAN_D2
" (+)
5
" and change
12.0
±0.1V. Select