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PIONEER GEXP7000
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of PIONEER GEXP7000 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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This manual is accurate and of high quality. It is only volume 2 of the service manual. This is schematic, parts lists, and exploded mechanical drawings. The theory of operation and the diss-assembly instructions are in volume 1. The unit can be tricky to dis-assemble portions of so the volume 1 manual can be important. The product description of the manual is accurate but it does not say anything about volume 1 and the image of the front page does clearly say Volume 2.
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It has all the information you will need to fix it. The main circuit diagram is only A4 but being a PDF, you can print it to any size - I did it on two sheets of A3 and it didnt lose any detail - just made it readable when pinned up above the bench. I've found the fault, just need to buy some obscure bits to get it going again! I cant fault the process, I paid for the manual in the morning and it was ready to download by lunch time.
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Text excerpt from page 47 (click to view)
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 Item 1 Diversity adjustment Input signal Adjustment Adjustment method Point Monitor the voltage of pin 2 of IC1001 (PM0013AM) and adjust the DC voltage to 2.5V ± 0.1V.(DC V Meter(1)) Note: If this has not been adjusted properly, extreme diversity switching occurs even with good receiving conditions, causing voice interruption. 2 Center meter Receive TV point adjustment B signals (US Band 10ch) 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. 3 SD adjustment Receive TV point B signals (US Band 10ch) RF level: 33 dBµ 4 RGB level adjustment Input white 100% with burst signal 1Vp-p to VTR1. VR801 VR402 Monitor the voltage of pin 19 of IC401 (LA1145M) and adjust the DC voltage to 2.5V ± 1.0V.(DC V Meter(2)) 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. 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 75Ω is connected to CN4801: 0.7Vp-p ± 0.1V (Oscilloscope(1))

Receive TV signals. TC1001

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 5 OSD clock adjustment Input white 100% with burst signal 1Vp-p to VTR1 TC2801 bright or dark. 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. 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 ± 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.

6

FM modulator tuning voltage adjustment

Play a −∞ CD.

L507

47

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