Adjustment Procedure - Pioneer KRL-46V Service Manual

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5

4. ADJUSTMENT PROCEDURE

1. Adjustment method after PWB and/or IC replacement due to repair
The unit is set to the optimum at the time of shipment from the factory. If any value should become improper or any adjustment is necessary due to
the part replacement, make an adjustment according to the following procedure.
1. Procure the following units in order to replace the main unit, IC3301, IC8101, IC3501, IC3502, IC8301, IC8302, IC8303, or IC8304.
MAIN UNIT
NOTE: [Caution when replacing ICs in the main unit (IC1501/IC1502/IC1503/IC2002) or the mini av unit (IC802)]
The above ICs are EEPROMs storing the EDID data of HDMI and the monitor microcomputer. Before replacing the relevant part, procure the
following parts in which the data have been rewritten.
IC2002
Monitor microcomputer
IC802
HDMI_INPUT4
IC1501
HDMI_INPUT5
IC1502
HDMI_INPUT6
IC1503
RGB (PC)_INPUT7
2. Adjustment: Change the Panel
(1) After replacing the LCD panel or LCD control PWB, adjust the VCOM in the following procedure:
1) Enter the process adjustment mode.
2) Use the cursor keys (i/j) and P (+/-) of R/C to select the item [VCOM ADJ] on the page 10/16.
3) Press the OK key to verify that the adjustment pattern is displayed.
4) Use the +/- keys of VOL of R/C to adjust the flicker in the center of the screen to minimum.
5) When the optimal state is achieved in Step 4, press the OK key to turn the pattern to OFF.
(2) After replacing the LCD panel or LCD control PWB, check PANEL_SIZE in the following procedure:
1) Enter the process adjustment mode.
2) Use the cursor keys (i/j) and P (+/-) of R/C to select the item [PANEL SIZE] on the page 16/16.
3) Verify that the panel size is displayed.
4) If the size doesn't match, select the values of the panel size with the Vol keys.
5) After selection in Step 4), press the OK key, and it is completed with OK displayed.
2. Entering and exiting the adjustment process mode
• Enter in Adjustment Process is using FACTORY key of special "PIONEER PDP SERVICE REMOTE CONTROL".
• To exit the adjustment process mode after the adjustment is don e, unplug the AC power cord to force off the power. (When the power is turned off
with the remote controller, once unplug the AC power cord and plug it in again. In this case, wait 10 seconds or so before plugging.)
CAUTION: Use due care in handling the information described here lest the users should know how to enter the adjustment process mode. If the
settings are tampered with in this mode, unrecoverable system damage may result.
3. Remote controller key operation and description of display in adjustment process mode.
1. key operation
R
e
m
o
e t
c
o
t n
o r
l l
r e
k
e
y
P (+/-)
V
O
L
+ (
) - /
Cursor (i/j)
Cursor (k/l)
N I
P
U
T
R
E
T
U
R
N
O
K
Input mode is switched automatically when relevant adjustment is started so far as the necessary input signal is available.
5
6
M
a
n i
u
n
t i
k
e
y
Moving an item (line) by one (UP/DOWN)
P (+/-)
V
O
L
+ (
) - /
C
h
a
n
g
n i
g
a
Turning a page (PREVIOUS / NEXT)
Changing a selected item setting (+10/-10)
N I
P
U
T
n I
p
t u
s
o
u
c r
e
R
e
u t
n r
n i
g
o t
E
x
e
c
t u
n i
g
a
6
7
FACTORY key
F
u
n
t c
s
e
e l
c
e t
d
i
e t
m
s
e
t t
n i
g
+ (
1
- /
) 1
→ INPUT1~8)
s
w
c t i
h
n i
g
(
o t
g
g
e l
s
w
c t i
h
n i
) g
T (
V
a
p
e r
s
e
t n
p
a
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u f
n
t c
o i
n
KRL-46V
7
8
PDP SERVICE
REMOTE CONTROL
o i
n
8
A
B
C
D
E
F
25

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