Basic Items For Service; Check Points After Servicing - Pioneer A-70DA-K Service Manual

1

3. BASIC ITEMS FOR SERVICE

3.1 CHECK POINTS AFTER SERVICING

A To keep the product quality after servicing, confirm recommended check points shown below.
No.
Check the symptom pointed out by a customer
1
Check each input and main VOL (check the
2 operation of selector)
Check the TONE CONTROL, BALANCE, and
3
function
Check LOUDNESS and DIRECT functions
B
4
Check POWER AMP DIRECT terminal
5 (connected from pre-out terminal of AV AMP to
POWER AMP DIRECT terminal)
6 Check SPEAKER A/B and headphone terminal
Check the external package
7
C
See the table below for the items to be checked regarding audio.
Item to be checked regarding audio
Distortion
Noise
Volume too low
Volume too high
Volume fluctuating
Sound interrupted
D
E
F
4
1
2
Procedures
2
3
The pointed content should not reoccur
Sound and operation should not be defective
The sound is output by selecting an analog-connected input
with a selector and the sound volume should change by
rotating main VOL knob
The sound quality or right and left balances should change
by rotating each VOL knob
The sound quality should change by setting LOUDNESS
function to ON. LOUDNESS function should be disabled by
setting DIRECT function to ON.
The sound volume should change by adjusting the sound
volume of connected AV AMP. The sound volume should not
be changed by the main VOL on the main unit.
There should not be defect in sound such as noise
Check scratch or taint is not generated after accepting the
repair
A-70DA-K
3
4
Check points
4