Clarion VRX630 6.5 inch (QC-6710B) LCD Monitor and FM/AM Radio with CD/MD/DVD Changer Control – circuit diagram and adjustments
CLOCK ADJUSTMENT1. Press the ADJ button to display the adjustment selection display.
2. Move the JOYSTICK up or down to select CLOCK, then press ENT at the center of the JOYSTICK to display the clock adjustment display.
3. Move the JOYSTICK left or right to select HR or MIN, then move the JOYSTICK up or down to adjust the time. The time is displayed in 12-hour format.
4. Pressing ENT at the center of the JOYSTICK when the cursor is above HR or MIN saves the adjusted value in memory and simultaneously returns the display to the
previous display (adjustment selection display).
To cancel clock adjustment before completion, use the JOYSTICK to move the cursor to MENU, and then press ENT at the center of the JOYSTICK.
Dot
clock adjustment (at Digital PWB)
1. Turn the screen on, and connect TP601(TEST) to GND.
2. Adjust TC601 so that the reading of the frequency counter at TP602 (VSYNC) is 12.00MHz+0.01/-0.02MHz.
DC-DC converter output voltage adjustment (at LCD PWB)
1. Adjust VR701 so that the voltage of TP703 is 5.05+0.05/-0.052V.
2. Make sure the voltage has become the following value at each test point.
TP702 : 7.5+0.5/-0.5V
TP704 : 18.5+1.0/-1.0V
TP701 : -15.5+1.0/-1.0V
1. Turn the screen on, and connect TP601(TEST) to GND.
2. Adjust TC601 so that the reading of the frequency counter at TP602 (VSYNC) is 12.00MHz+0.01/-0.02MHz.
DC-DC converter output voltage adjustment (at LCD PWB)
1. Adjust VR701 so that the voltage of TP703 is 5.05+0.05/-0.052V.
2. Make sure the voltage has become the following value at each test point.
TP702 : 7.5+0.5/-0.5V
TP704 : 18.5+1.0/-1.0V
TP701 : -15.5+1.0/-1.0V
Display board schematic [Click on the schematics to magnify]
Digital board
Main board
LCD PCB
Printed wire board
Frequency of IC706 adjustment (at LCD PWB)
1. Adjust VR708 so that the frequency of TP712 is 144kHz.
VIDEO signal adjustment (at LCD PWB)
Input the visual signal(10step wave, monochrome, APL=50%,
1.0Vp-p)to the VIDEO input.
BRIGHT voltage confirmation (NTSC mode)
Make sure the voltage of TP706 is 1.88+0.1/-0.1V.
2. RGB-AMP/CONT-G adjustment (NTSC mode)