Pioneer AVH-P7900DVD, Service Manual

Page: 23 / 260

AVH-P7900DVD/RE
23
5 6 7 8
5 6
7
8
C
D
F
A
B
E
3. BASIC ITEMS FOR SERVICE
3.1 CHECK POINTS AFTER SERVICING
Block-noise
Horizontal noise
Dot noise
Disturbed image (video jumpiness)
Too dark
Too bright
Mottled color Distortion
Noise
Volume too low
Volume too high
Volume fluctuating
Sound interrupted
To keep the product quality after servicing, please confirm following check points.
When flap-mecha exists
NO Procedures Check points
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.
Check the operation of the flap mechanism. The flap mechanism operation must be smooth
without making the noise and scratches. Flap-mecha
DVD Measure playback error rates at the innermost and
outermost tracks by using the test mode with the
following disc.
DVD test disc (GGV1018)
Deterioration of mecha-drive can be checked.
The error rates must be less than 2.5e-4.
DVD Play back a DVD.
(Menu operation; Title/chapter search)
Display, video, audio and operations must be normal.
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.
TV tuner Check TV tuner action.
(Seek; Preset)
Display, video, audio and operations must be normal.
Check whether no disc is inside the product. The media used for the operating check must be
ejected.
Appearance check No scratches or dirt on its appearance after
receiving it for service.
See the table below for the items to be checked regarding video and audio:
Remark
1
2
3
4
6
7
8
9
Item to be checked regarding video Item to be checked regarding audio
CD Play back a CD.
(Track search)
Display, audio and operations must be normal.
5