Pioneer AVH-4400BT/XUEW5, Service Manual

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1. SERVICE PRECAUTIONS
1.1 SERVICE PRECAUTIONS
1. You should conform to the regulations governing the product (safety, radio and noise, and other regulations), and
should keep the safety during servicing by following the safety instructions described in this manual.
2. Be careful in handling ICs. Some ICs such as MOS type are so fragile that they can be damaged by electrostatic
induction.
3. Please be sure to conduct line process to original status if you make assembling after repair.
4. Please be careful of not to imply static charge onto integrated circuits, etc, when you conduct repair work.
Especially, please use soldering iron with its tip grounded.
Also, please use a pair of tweezers with static charge protection capability if there is the possibility of contacting to
device terminals, and avoid the use of metal-made tweezers.
5. Before disassembling the unit, be sure to turn off the power. Unplugging and plugging the connectors during power-on
mode may damage the ICs inside the unit.
6. To protect the pickup unit from electrostatic discharge during servicing, take an appropriate treatment (shorting-solder)
by referring to "the DISASSEMBLY".
7. Please keep the distance of more than 13 cm from focus lens for safety when you check pickup and make adjustment,
and do not look straight at Laser Beam for more than 10 seconds.
8. Please power adjustment when you replaced mechanical area of DVD Mecha Module or DVD core unit.
9. Graphically-illustrated areas become hot . Be careful not to burn yourself.
10. The acceptance surface of the remote controller on the keyboard PCB is not fixed with a cushion or other materials.
External force applied on the acceptance surface of the remote controller may distort the lead and change the mounting
angle of the acceptance surface, and accordingly, deteriorate the light sensitivity.
Do not apply external force on the acceptance surface of the remote controller.
If you accidentally apply external force, check whether the lead is bent or not.
If the lead is bent, repair it so that the angle between the lead and the acceptance surface becomes 90 degrees, or
exchange the acceptance surface for the remote controller (PNJ4833M).
11. When a home product is used in a vehicle (using DC/AC converter), GND on secondary side of some devices of home
products (PS etc.) becomes indefinite. If these devices are connected to AVH, GND becomes indefinite because ISO is
received and the video disordered.
If a defect is generated in a market, the land is prepared between GNDs for connecting GND of AVH sides and VGND
of input as a service.
With this product, a part of VGND pattern is thin. If it is used, insert 0.5A of fuse.
A used part and wiring numbers are shown below.
Wiring number: P531, P532
Used part: CEK1379 or CEK1278
12. The part listed below is difficult to replace as a discrete component part.
When the part listed in the table is defective, replace whole Assy.
13. On this mechanism, Pickup and Spindle Motor can not be replaced at the service site, because a special facility is
required for the adjustment after replacing them.
So, if Pickup or Spindle Motor is defective, replace the Mechanism Unit.
Main IC
IC1501
Drive
IC
IC1251
SERVICE UNIT (MONITOR)
MOTHER PCB IC5301 OZ527IRN Heat pad
IC751 341S2162
QFN package
Heat Sink
Holder
Case