Clarion MAX667VD, Руководство по обслуживанию

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MAX667VD - 3 -
3. Check for safety after repair.
Check that the screws, parts and wires are put back securely
in their original position after repair. Ensure for safety reasons
there is no possibility of secondary ploblems around the re-
paired spots.
If extended damage is caused due to negligence of repair, the
legal responsibility shall be with the repairing company.
4. Caution in removal and making wiring connection to the parts
for the automobile.
Disconnect the battery terminal after turning the ignition key
off. If wrong wiring connections are made with the battery con-
nected, a short circuit and/or fire may occur. If extensive dam-
age is caused due to negligence of repair, the legal responsi-
bility shall be with the repairing company.
5. Cautions in soldering
Please do not spread liquid flux in soldering.
Please do not wash the soldering point after soldering.
6. Cautions in soldering for chip capacitors
Please solder the chip capacitors after pre-heating for replace-
ment because they are very weak to heat.
Please do not heat the chip capacitors with a soldering iron
directly.
7. Cautions in handling for chip parts.
Do not reuse removed chips even when no abnormality is ob-
served in their appearance. Always replace them with new
ones. (The chip parts include resistors, capacitors, diodes, tran-
sistors, etc).
Please make an operation test after replacement.
8. Cautions in handling flexible PWB
Before working with a soldering iron, make sure that the iron
tip temperature is around 270 . Take care not to apply the
iron tip repeatedly(more than three times)to the same patterns.
Also take care not to apply the tip with force.
9. Turn the unit OFF during disassembly and parts replacement.
Recheck all work before you apply power to the unit.
10. Cautions in checking that the optical pickup lights up.
The laser is focused on the disc reflection surface through the
lens of the optical pickup. When checking that the laser opti-
cal diode lights up, keep your eyes more than 30cms away
from the lens. Prolonged viewing of the laser within 30cms
may damage your eyesight.
11. Cautions in handling the optical pickup
The laser diode of the optical pickup can be damaged by elec-
trostatic charge caused by your clothes and body. Make sure
to avoid electrostatic charges on your clothes or body, or dis-
charge static electricity before handling the optical pickup.
11-1. Laser diode
The laser diode terminals are shorted for transportation in or-
der to prevent electrostatic damage. After replacement, open
the shorted circuit. When removing the pickup from the mecha-
nism, short the terminals by soldering them to prevent this
damage.
11-2. Actuator
The actuator has a powerful magnetic circuit. If a magnetic
material is put close to it. Its characteristics will change. En-
sure that no foreign substances enter through the ventilation
slots in the cover.
11-3. Cleaning the lens
Dust on the optical lens affects performance.
To clean the lens, apply a small amount of isopropyl alcohol to
lens paper and wipe the lens gently.
ADJUSTMENTS
* Refer to the printed circut board(LCD PWB) for the ad-
justment points and VRs.
* The NTSC composite output signal of the signal gen-
erators of adjustment is performed with the following
output.(Video input of visual mode)
Video signal: 714mV
Synchronized signal: 286mV
Power supply voltage adjustment
Input signal: NTSC / COMP: 10-steps signal / Monochrome
/ APL 50% wave form / With composite screen display /
DIMMER 100% / Measuring instrument: digital volt meter
1. Adjust VR600 so that the voltage of TP710 is 5.30+0.02/
-0.02V.
2. Confirm the following voltages.
TP709 : -17.0+0.8/-0.8V
TP711 : 7.5V+0.5/-0.5V
TP713 : 15.0V+0.8/-0.8V
Free-run frequency adjustment
Measurement conditions: the same conditions as the ad-
justment of "Power supply voltage". / Measuring instrument:
frequency counter and digital volt meter
1. Connect TP40 to GND, and adjust VR401 so that the
frequency of TP42 will become 15.50/-50Hz.
2. Confirm the following voltages.
TP46 : 2.58V+0.15/-0.15V
BRIGHT voltage adjustment
Measurement conditions: the same conditions as the ad-
justment of "Power supply voltage". / Measuring instrument:
digital volt meter
1. Adjust VR705 so that the voltage of TP708 will become
2.00V+0.02/-0.02V.
RGB-AMP adjustment (black-black)
Measurement conditions: the same conditions as the ad-
justment of "Power supply voltage". / Measuring instrument:
oscilloscope
1. Adjusts VR707 so that the black-black level of the wave-
form of TP716(G) will become 4.0V+0.1/-0.1V.
Contrast adjustment (black-white)
Input signal: NTSC / COMP: 10-steps signal / Monochrome
/ APL 50% wave form / With composite screen display /
BRT,COL,HUE: Initial setting of touch panel microcomputer
/ Measuring instrument: oscilloscope
1. Adjusts VR702 so that the black-white level of the wave-
form of TP716(G) will become 3.8V+0.1/-0.1V.
White balance pre-adjustment
Measurement conditions: the same conditions as the ad-
justment of "Power supply voltage". / Measuring instrument:
oscilloscope(DC range)
Black
Withe
Withe
Black
4.0V+0.1/0.1V
Black
Withe
Withe
Black
3.8V+0.1/0.1V