Pioneer GEX-P7000TVP, Service Manual

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GEX-P7000TV,P7000TVP
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 Adjustment Adjustment method
Item Point
1 Diversity Receive TV signals. TC1001 Monitor the voltage of pin 2 of IC1001 (PM0013AM) and adjust the DC
adjustment voltage to 2.5V
±
0.1V.(DC V Meter(1))
Note: If this has not been adjusted properly, extreme diversity switch-
ing occurs even with good receiving conditions, causing voice inter-
ruption.
2 Center meter Receive TV point L401 Monitor the voltage between pins 9 and 12 of IC401 (LA1145M) and
adjustment B signals reduce the potential difference between both edges to zero.
(US Band 10ch) (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.
3 SD Receive TV point VR402 Monitor the voltage of pin 19 of IC401 (LA1145M) and adjust the DC
adjustment B signals voltage to 2.5V
±
1.0V.(DC V Meter(2))
(US Band 10ch) Note: If this has not been adjusted properly, seek may stop even
RF level: 33 dB
µ
without any signal input or may not stop even when turning input
signals stronger.
4 RGB level Input white 100% VR801 Turn the TV on and enable VTR1 using the menu screen setting.
adjustment with burst signal Set the source to VTR1 and monitor the waveform of pin 2 of RGB
1Vp-p to VTR1. monitor output CN4801. Adjust the video output of pin 2 as follows:
When the RGB monitor or 75
Ω
is connected to CN4801: 0.7Vp-p
±
0.1V
When nothing is connected to CN4801: 1.4Vp-p
±
0.2V
(DSENS(Pin 12):Connect to GND)
Note: If this has not been adjusted properly, the screen becomes too
bright or dark.
5 OSD clock Input white 100% TC2801 Before this adjustment, connect the RGB monitor (since return
adjustment with burst signal synchronous signals are required to be input from the monitor).
1Vp-p to VTR1 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.
6 FM Play a
−∞
CD. L507 Set the MODE switch (S1001) to the FM modulator mode. Connect a
modulator multi-CD and start-up the source with the CD. Set the modulator
tuning frequency to 89.1 MHz on the menu screen. Monitor the collector
voltage voltage (positive side of C537) of Q503 and adjust the DC voltage to
adjustment 3.0V
±
0.1V.(DC V Meter(3))
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.
(Oscilloscope(1))
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