General Information; Trouble Shootig - Pioneer SX-A9-J Service Manual

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7. GENERAL INFORMATION

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7.1 TROUBLE SHOOTIG

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FUSE F801 is blown.
LCD BACK LIGHTING is not lit.
MICOM is not functioning.
When SPEAKER PROTECTION is
engaged
ELECTRONIC VOLUME is not functioning.
TE
L 13942296513
When there is no sound
HEAT SINK is overheated.
MOTOR VOLUME is not functioning.
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N
POWER ASSY
Check whether D809, D810, D813 or D814 is damaged.
Check whether +5V is output at OUT PUT of IC804 REG IC.
Check the voltage drop at resistor R852 22Ω.
Check the voltage drops at resistors R821, R822 0.22Ω.
Check whether +6V is output at OUT PUT of IC809.
A
FUNCTION ASSY
Check whether XTAL101 is oscillating properly.
Check whether RESET IC of IC511 is functioning properly.
I
AMP L CH ASSY
J
AMP R CH ASSY
Check whether POWER TR is functioning properly.
Check whether R730, R729
R755 /0.22Ω of R-CH are damaged.
Check whether + power supply and - power supply are supplied.
A
FUNCTION ASSY
Check whether +8V is output at OUT PUT of IC112, and
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whether -8V is output at OUT PUT of IC111.
Check whether data is input to PIN42, 43 of IC101.
Check the operation status of Q111, Q112 MUTE TR.
I
AMP L CH ASSY
J
AMP R CH ASSY
Check whether IDLE is adjusted at 52mv+/-10mV without load.
N
POWER ASSY
Check whether +9V is output at OUT PUT of IC807.
C
MOTOR VR ASSY
Check whether MOTOR DRIVE IC of IC650 is functioning
properly.
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/0.22Ω of L-CH and R774,
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