Sony HCD-GTR888 Service Manual ▷ View online
21
(5) The POWER AMP (IC4903,4904) in the CLASS D AMP outputs
speaker signal for
FRONT L/R and
SATELLITE L/R.
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<Shutdown by unusual detection>
When the unit is in protect status, it can confirm the protect status
mode of the unit if press ”PLAY/PAUSE + STOP” key at the status.
Regarding each mode of the protect,
Describe the place which have the possibility of the defect .
Use it for your reference of repair.
When the unit is in protect status, it can confirm the protect status
mode of the unit if press ”PLAY/PAUSE + STOP” key at the status.
Regarding each mode of the protect,
Describe the place which have the possibility of the defect .
Use it for your reference of repair.
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<Note>
1.When the CLASS D AMP circuit does not output the signal,
c
heck
with a tester
whether there is not any problem in all the REG IC on
AMP circuit.
2.When the
REG IC
of VCC
and the voltage output terminal
shorted out,
the REG IC is broken. Also the REG IC may be damaged at same
time.
3. Refer to the 7-3 for how to check of MOS FET.
4. When the AMP circuit have a
damage, a lot of AMP IC may be
damaged at same time. In that case, suggest to replace the DAMP
mount for protecting the safety.
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