Yamaha htr-5890 Manuale di servizio - Pagina 17
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- 1. Table of Contents
- 2. Service Manual
- 3. Important Notice
- 4. To Service Personnel
- 5. Front Panel
- 6. Remote Control Panel
- 7. Rear Panels
- 8. Specifications
- 9. Internal View
- 10. Disassembly Procedures
- 11. Updating Firmware
- 12. Self Diagnosis Function (Diag)
- 13. Amp Adjustment
- 14. Display Data
- 15. IC Data
- 16. Remote Control
When there is a history of protection
function due to abnormal voltage in
the power supply section
Voltage display in %
Cause: The voltage in the power supply section is
abnormal.
Supplementary information: The abnormal voltage is
displayed in % based on 5V as 100%.
Turning on the power without correcting the abnormality
will cause the protection function to work 1 second later
and the power supply will be shut off.
When there is a history of protection
function due to abnormal DC output
Cause: DC output of the power amplifier is abnormal.
Supplementary information: The abnormal voltage is
displayed in % based on 5V as 100%.
Turning on the power without correcting the abnormality
will cause the protection function to work 3 seconds later
and the power supply will be shut off.
When there is a history of protection
function due to excessive heat sink
temperature
Voltage display in %
Cause: The temperature of the heat sink is excessive
high.
Supplementary information: The abnormal voltage is
displayed in % based on 5V as 500%.
Turning on the power without correcting the abnormality
will cause the protection function to work 1 second later
and the power supply will be shut off.
* Additional causes of protection can be due to loose
connections, associated components, CPU, etc.
* For the protection voltage value, refer to DIAG menu
No.12 described later.
Version (1 alphabet)
• Display during menu operation
During the DIAG operation, the menu list described in the
s e c t i o n o f t h e s t a r t u p s c r e e n a p p e a r s o n t h e
superimposed screen and the function at work is indicated
on the FL indicator. The contents displayed during the
function operation are described in the later section on
Version (1 alphabet)
details of functions.
• Operation procedure of DIAG menu and
There are 18 MENU items, each of which has some SUB-
MENU items.
DIAG menu selection
Select the menu using the PROGRAM knob.
SUB-MENU selection
Select the sub-menu using
keys of PRESET/TUNING.
Version (1 alphabet)
Reverse
• History of protection function
When the protection function has worked, its history is
stored in memory with a backup. Even if no abnormality
is noted while servicing the unit, an abnormality which
has occurred previously can be defined as long as the
backup data has been stored.
The history of the protection function is cleared when
DIAG is cancelled by selecting PRESET RESERVED
(Memory initialized) of DIAG menu No. 11 or when the
backup data is erased.
SUB-MENU
(Forward) and
DIAG menu selection
Forward
HTR-5890
(Reverse)
SUB-MENU selection
Reverse
Forward
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