Cleaning - Pioneer PRO-R04U Service Manual

5
No. Pin Name
7 S-1
14 S-2
21 S-3
28 S-4
32 ADR
33 SCL
34 SDA
36 DC_OUT
55 TRAP1
46 TRAP2
48 MUTE
50 BIAS

7.4 CLEANING

Before shipping out the product, be sure to clean the following positions by using the prescribed cleaning tools:
Position to be cleaned Cleaning tools
Fans Cleaning paper : GED-008
5
6
I/O
Composite video/S selector.
The detection results are written to the status register.
−
S signal at 3.5 V or less. Composite video signal at 3.5 V or more.
This pin is pulled up to 5 V by a 100 k ohm resistor, so the composite video signal is selected when
open.
Selects the slave address for the I2C bus.
−
90H at 1.5 V or less 92H at 2.5 V or more
I I2C bus signal input VILmax=1.5 V
I I2C bus signal input VILmax=1.5 V
Outputs the S2-compatible DC superimposed onto the COUT3 output.
The DC is superimposed by connecting this pin to the COUT3 output via a capacitor.
Control is performed by the I2C bus. When 0 V is output, Q1 is ON and the impedance is 5 k ohm.
S2 protocol output impedance of 10 ± 3 k ohm is realized by attaching external resistance of 4.7 k
O ohm.
DC_OUT (bus) Output DC
0
1
2
3
−
Connects trap circuit for subcarrier.
Audio signal output mute.
Mute OFF at 1.5 V or less
−
Mute ON at 2.5 V or more
Mute OFF when open.
Internal reference bias (VCC/2).
−
Connect to GND via a capacitor.
6
7
Pin Function
90H when open.
VIHmin=3.0 V
VIHmin=3.0 V VOLmax=0.4 V
4.5 V
0 V
1.9 V
4.5 V
PDP-R04U
7
8
A
B
C
D
E
F
171
8