Pioneer PDP-R05G, Service Manual

Page: 150 / 180

PDP-R05G
150
1 2 3 4
1 2 3 4
C
D
F
A
B
E
No. Pin Name Pin Function
1 HSCTL
HDRV output
Used to select whether to output the VDRV section of the HDRV output signal.
High : VDRV section of HDRV is output
Low : VDRV section of HDRV is not output
2 C/HSYNC IN
Composite sync / H SYNC input
Input either the composite synchronization signal or the horizontal synchronization signal.
Input is clamped, and is initiated by capacitor coupling.
3 VIDEO IN
SYNC ON VIDEO input
Inputs the SYNC ON VIDEO signal(green).
Input is sink chip clamped.
Input is initiated by capacitor coupling.
4 VSEPA
f-V conversion
Converts the horizontal synchronization signal frequency into a voltage.
The voltage generated is proportional to the frequency of the horizontal synchronization signal.
Attach a 0.56
µ
F capacitor between the ground pins.
5 VSYNC IN V SYNC input Inputs the vertical synchronization signal.
6 CVPOL
Vertical polarity integration
Integrates the vertical synchronization signal polarity detection circuit.
Attach a 1.5
µ
F capacitor between this pin and the ground.
7 CVEXI
Vertical existence integration
Integrates the vertical synchronization signal existence detection circuit.
Attach a 1
µ
F capacitor between this pin and the ground.
8 CPSEL
Setting the clamp position
Used to set the clamp pulse generation position to either the front or back edge of HSYNC
High : The front edge is the generation position
Open : Composite / H SYNC IN : The front edge is the generation position
VIDEO IN : The back edge is the generation position
Low : The back edge is the generation position
9 GND Ground
10 CPWID
Setting the clamp pulse width
Sets the clamp pulse width according to the attached time constant.
Attach a resistor between this pin and VCC and, a capacitor between this pin and GND.
When R = 3.9k
Ω
and C = 100pF, pulse width is approximately 400 ns.
Set the resistor to register an abnormality at 1k
Ω
.
11 VDRV
VDRV output
Outputs the vertical synchronization signal.
The output signal has positive polarity.
12 CLAMP
Clamp output
Outputs the clamp pulse generated from the vertical synchronization signal.
The output signal has a positive polarity.
13 HDRV
HDRV output
Outputs the clamp pulse generated from the horizontal synchronization signal.
The output signal has positive polarity.
14 Vcc Power supply
15 EXIV
Vertical existence output
Indecates whether the vertical synchronization signal exists.
16 POLV
Vertical polarity output
Indicates the polarity of the vertical synchronization signal.
17 EXIH
Horizontal existence output
Indicates whether the horizontal synchronization signal exists.
18 POLH
Horizontal polarity output
Indicates the polarity of the horizontal synchronization signal.
Pin Function