Pioneer AVH-4400BT/XUEW5, Service Manual

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3. BASIC ITEMS FOR SERVICE
3.1 CHECK POINTS AFTER SERVICING
To keep the product quality after servicing, please confirm following check points.
No. Procedures Item to be confirmed
1 Confirm whether the customer complain has
been solved.
If the customer complain occurs with the
specific media, use it for the operation check. The customer complain must not be
reappeared.
Display, video, audio and operations must be
normal.
3 DVD Measure playback error rates at the
innermost and outermost tracks by using the
test mode with the following disc.
DVD test disc (TDV-582) Deterioration of mecha-drive can be
checked.
The error rate must be less than the
threshold value.
(Refer to the chapter of DIAGNOSIS for the
threshold value.)
4 DVD Play back a DVD.
(Menu operation; Title/chapter search) Display, video, audio and operations must be
normal.
5 CD Play back a CD.
(Track search) Display, audio and operations must be
normal.
6 FM/AM tuner Check FM/AM tuner action.
(Seek, Preset)
Switch band to check both FM and AM. Display, audio and operations must be
normal. * If the reception sensitivity is poorer
than normal, the gasket on the FM/AM tuner
unit may be damaged or lost.
7 Check whether no disc is inside the product. The media used for the operating check must
be ejected.
8 Appearance check No scratches or dirt on its appearance after
receiving it for service.
For check items concerning image and voice, please refer to the followings:
Check items concerning image Check items concerning voice
Block-noise Distortion
Crosscut noise Noise
Dot noise Low volume
Distorted image (Image skip) High volume
Low brightness Changes in level
Too bright Pause of sound
Color fading
Partial discoloration
2 Flap-mecha Check the operation of the flap mechanism. The flap mechanism operation must be
smooth without making the noise and
scratches.