Pioneer GEX-P7000TV Service Manual page 47

Before adjustment, set the diversity to 1 so as to prevent the circuit from operating during input signals are weak (use
"1" input for antenna input).
Use rear monitor or OSD output for the video monitor.
Procedure Adjustment Input signal
Item
1 Diversity Receive TV signals. TC1001
adjustment
2 Center meter Receive TV point
adjustment B signals
(US Band 10ch)
3 SD Receive TV point
adjustment B signals
(US Band 10ch)
RF level: 33 dB
4 RGB level Input white 100%
adjustment with burst signal
1Vp-p to VTR1.
5 OSD clock Input white 100%
adjustment with burst signal
1Vp-p to VTR1
6 FM Play a
modulator
tuning
voltage
adjustment
Adjustment Adjustment method
Point
Monitor the voltage of pin 2 of IC1001 (PM0013AM) and adjust the DC
voltage to 2.5V
Note: If this has not been adjusted properly, extreme diversity switch-
ing occurs even with good receiving conditions, causing voice inter-
ruption.
L401 Monitor the voltage between pins 9 and 12 of IC401 (LA1145M) and
reduce the potential difference between both edges to zero.
(Center Meter)
Note: If this has not been adjusted properly, the voice becomes low
too fast as input signals become weak. Even worse, sound may be
strained or no sound output.
VR402 Monitor the voltage of pin 19 of IC401 (LA1145M) and adjust the DC
voltage to 2.5V
Note: If this has not been adjusted properly, seek may stop even
without any signal input or may not stop even when turning input
signals stronger.
VR801 Turn the TV on and enable VTR1 using the menu screen setting.
Set the source to VTR1 and monitor the waveform of pin 2 of RGB
monitor output CN4801. Adjust the video output of pin 2 as follows:
When the RGB monitor or 75
0.1V
When nothing is connected to CN4801: 1.4Vp-p
(DSENS(Pin 12):Connect to GND)
Note: If this has not been adjusted properly, the screen becomes too
bright or dark.
TC2801 Before this adjustment, connect the RGB monitor (since return
synchronous signals are required to be input from the monitor).
Connect AVX-7000.
Turn the TV on and enable VTR1 using the menu screen setting.
Set the source to VTR1 and display the OSD menu screen. Adjust the
screen so that the OSD display comes center.
Note: If this has not been adjusted properly, the menu screen OSD
display shifts.
CD. L507 Set the MODE switch (S1001) to the FM modulator mode. Connect a
multi-CD and start-up the source with the CD. Set the modulator
frequency to 89.1 MHz on the menu screen. Monitor the collector
voltage (positive side of C537) of Q503 and adjust the DC voltage to
3.0V
Note: To use the menu screen, connect an RGB monitor.
Note: If this has not been adjusted properly, RF is strained when the
modulator frequency is low or high.
GEX-P7000TV,P7000TVP
0.1V.(DC V Meter(1))
1.0V.(DC V Meter(2))
is connected to CN4801: 0.7Vp-p
0.1V.(DC V Meter(3))
(Oscilloscope(1))
0.2V
47