Pioneer AVH-2350DVD, Service Manual

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1. SERVICE PRECAUTIONS
1.1 SERVICE PRECAUTIONS
Authentication IC
MOTHER PCB
IC851 341S2162 Legs are bent inside
FET Q1201 RP1E050RP Heat pad
FET Q1202 RP1E050RP Heat pad
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. 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.
4. To protect the pickup unit from electrostatic discharge during servicing, take an appropriate treatment
(shorting-solder) by referring to "the DISASSEMBLY" .
5. After replacing the pickup unit, be sure to skew adjustment.
6. During disassembly, be sure to turn the power off since an internal IC might be destroyed when a connector
is plugged or unplugged.
7. Countermeasures to user complaints on iPhone/iPod touch lip synchronization
When a video is replayed, the video and audio may be out of synchronization depending on the connected
iPod or iPhone.
If it is annoying, perform the following operation.
However, this operation will slightly deteriorate the sound quality of the iPod source.
Also, it will disable the ASR function when the iPod source is used.
[Default]
Audio digital mode
[Switching procedure]
Press MODE and EJECT and turn on Accessory simultaneously
The above switches the “Audio digital mode” to the “Audio analog mode”.
When the mode is switching, the BEEP1 sound will be heard.
[Supplement]
• The mode switching operation can only switch the “Audio digital mode” to the “Audio analog mode”.
(The BEEP1 sound will be heard every time.)
• No indication of the mode is provided.
[Resetting the mode]
Reset or BackUP OFF
The above resets the mode to the “Audio digital mode”.
Verification method
If the voice is not heard when a movie is played with the AUX jack unplugged, the voice has been switched to analog.
* Initially, AUDIO sound is output with the AUX jack unplugged as it comes in via USB (digital).
8. 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).
9. 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.
10. EJECT LOCK MODE for DVD mechanism
How to enter : Press RESET while pressing [FORWARD] and [EJECT] keys together.
How to exit : Same procedure to enter this mode.
11. When EEPROM is initialized, eject lock may be enabled. Please cancel eject lock in this case.