Pioneer KRP-500P Service Manual page 51

5
Adjustable Range
Voltage to be
Assy Name
50-inch
Checked (V)
(LFT)
VSNOFS 101 to 157
VYRST 001 to 074
VKNOFS1_2 121 to 164
Y DRIVE
Assy
107 to 149
VKNOFS3
VKNOFS4 151 to 193
XKOFS1 085
X DRIVE
XKOFS2 047
Assy
(*1): These parts have not been mounted.
(*2): It is recommended to measure the DAC output voltage with the drive off.
(*3): View when the Assy is mounted on the unit and viewed from the rear.
Diagrammatic view of the Y DRIVE Assy
E
G
C
5
6
Measurement Point
Output at the
50-inch
DAC Output (*2)
Last Stage
(Others)
085 to 140 CN2404 (*1) Lower side of R2723 (*3)
001 to 093 CN2401 (*1) Upper side of R2621 (*3)
117 to 159 CN2405 (*1) Left side of R2754 (*3)
107 to 149 CN2403 (*1) Right side of R2757 (*3)
128 to 170 CN2406 (*1) Right side of R2755 (*3)
085 CN1302 (*1) K1402 (*1)
047 CN1301 (*1) K1401 (*1)
D A F
B
KRP-500P
6
7
Computation Formula for Voltage (Absolute Value)
Computation Using
DAC Output Voltage (V)
55.54 - VOFS_ADJ × 13.91
VYPRST_ADJ × 62.495 + 75.2
YVKNOFS1_ADJ × 36.85 + 159.3
YVKNOFS3_ADJ × 36.85 + 159.3
YVKNOFS4_ADJ × 36.85 + 159.3
XKNOFS1_ADJ × 27.3 + 30
XKNOFS2_ADJ × 25.0 + 69.8
(*4): The value calculated using an adjustment value may be different from the
value measured at the last output stage, because various corrections such
as temperature correction are not taken into consideration.
Diagrammatic view of the X DRIVE Assy
H
J
I
7
8
Computation Using Adjustment
Value (*4)
VOF value × 0.18 + 9.6
VRP value × 0.81 + 74.4
(V1F value+VYF value-128)
× 0.48 + 158.8
(V3F value+VYF value-128)
× 0.48 + 158.8
(V4F value+VYF value-128)
× 0.48 + 158.8
VX1 value × 0.35 + 29.7
VX2 value × 0.32 + 69.5
A R2754,R2755,R2757
B R2723
C R2621
D CN2405
E CN2403,CN2406
F CN2404
G CN2401
H K1401
I K1402
J CN1301,CN1302
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A
B
C
D
E
F