Yamaha htr-5890 Servis Kılavuzu - Sayfa 16
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Sayfayı Yazdır
- 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
HTR-5890
• Starting DIAG
Press the "STANDBY/ON" key while simultaneously
pressing those two keys of the main unit as indicated in the
figure below.
Keys of main unit
Turn on the power while pressing these keys.
• Starting DIAG in the protection cancel
mode
If the protection function works and causes hindrance to
trouble diagnosis, cancel the protection function as
described below, and it will be possible to enter the DIAG
mode. (The protection functions other than the excess
current detect function will be disabled.)
Press the "STANDBY/ON" key while simultaneously
pressing those two keys indicated in the figure above. At
this time, keep pressing those two keys for 3 seconds or
longer.
In this mode, the "SLEEP" segment of the FL display of the
main unit flashes to indicate that the mode is DIAG mode
with the protection functions disabled.
CAUTION!
Using this product with the protection function disabled
may cause damage to itself. Use special care for this point
when using this mode.
• Canceling DIAG
[1] Before canceling DIAG, execute setting for PRESET of
DIAG menu No.11 (Memory initialization inhibited or
Memory initialized).
* In order to keep the user memory stored, be sure to
select PRESET INHIBIT (Memory initialization
inhibited). Any protection history will remain in
memory.
[2] Turn off the power by pressing the "STANDBY/ON"
key of the main unit or the "STANDBY" key of the
remote controller.
16
• Display provided when DIAG started
When the monitor is connected, DIAGNOSTIC MENU
appears on its screen as shown in the figure. (It remains
on display until DIAG is cancelled.)
DIAGNOSTIC MENU
1.DSP THR
2.BYPASS
3.RAM THR
4.PRO LOGIC 13.VC STATUS
5.SP SET
6.EXT_INPUT 15.DSP RAM
7.MIC CHECK 16.PRT SET
8.VFD CHECK 17.SOFT SW
9.MAN' LTEST 18.VER/SUM/P
The FL display of the main unit displays the protection
function history data and the version (1 alphabet) and
then the DIAG menu [sub-menu (YSS 0dB) of DIAG menu
No.1 DSP THROUGH] a few seconds later.
When there is no history of protection function:
Opening message
When there is no history
Version (1 alphabet)
of protection function
After a few seconds
When there is a history of protection function:
When there is a history of protection
function due to excess current
Cause: An excessive current flowed through the power
amplifier.
Turning on the power without correcting the abnormality
will cause the protection function to work immediately and
the power supply will instantly be shut off.
Note)
• Applying the power to a unit without correcting the
abnormality can be dangerous and cause additional
circuit damage.
• The output transistors in each amplifier channel
should be checked for damage before applying any
power.
• Amplifier current should be monitored by measuring
across the emitter resistors for each channel.
10.RS232C
11.PRESET
12.AD/FAN
14.IF STATUS
DIAG menu display
Version (1 alphabet)