Pioneer SC-LX72, Service Manual

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SC-LX82
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3. BASIC ITEMS FOR SERVICE
3.1 CHECK POINTS AFTER SERVICING
Item to be checked regarding video Item to be checked regarding audio
Block noise Distortion
Horizontal noise N oise
Flicker V olume too low
Disturbed image (video jumpiness) V olume too high
Too dark V olume fluctuating
Too bright Sound interrupted
Mottled color
No. Procedures Check points
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Confirm whether the customer complain has been solved.
If the customer complain occurs with the particular source,
such as Dolby Digital, DTS, AAC, D
V D-A and HDMI, input it for
the operation check.
The customer complain must not be reappeared.
V ideo, Audio and operations must be normal.
Check the analog audio playback.
(Make the analog connections with a D
V D player.)
Each channel audio and operations must be normal.
Check the digital audio playback.
(Make the digital connections with a D
V D player.)
Each channel audio and operations must be normal.
Check surround playback.
(Select Surround mode and check the multichannel operations
via the DSP circuit.) Each channel audio and operations must be normal.
Check the tuner (AM and FM) operations. Audio and operations must be normal.
Check the video outputs.
(Connect with a D
V D player.)
V ideo and operations must be normal.
Check the sound from headphone output. Sound must be normal, without noise.
Check the appearance of the product. N o scratches or dirt on its appearance after receiving it for
service.
Items to be checked after servicing
To keep the product quality after servicing, confirm recommended check points shown below.
See the table below for the items to be checked regarding video and audio.
Cleaning
Before shipping out the product, be sure to clean the following positions by using the prescribed cleaning tools.
Name Position to be cleaned Part No. Remarks
Refer to “9.4 CHASSIS SECTIO N ”. Cleaning paper Fans GED-00 8