Service manual
Table Of Contents
- CONTENTS
- TO SERVICE PERSONNEL
- FRONT PANELS
- REAR PANELS
- REMOTE CONTROL PANELS
- SPECIFICATIONS
- INTERNAL VIEW
- SET MENU TABLE
- SERVICE PRECAUTIONS
- DISASSEMBLY PROCEDURES
- UPDATING FIRMWARE
- SELF-DIAGNOSTIC FUNCTION
- Starting Self-Diagnostic Function
- Starting Self-Diagnostic Function in the protection cancel mode
- Canceling Self-Diagnostic Function
- Display provided when Self-Diagnostic Function started
- Display during Self-Diagnostic Function operation
- Operation procedure of Main menu and Sub-menu
- Functions in Self-Diagnostic Function mode
- Initial settings used to start Self-Diagnostic Function
- Details of Self-Diagnostic Function menu
- 1. DSP THROUGH
- 2. RAM THROUGH
- 3. PRO LOGIC / Neo:6
- 4. MIC CHECK
- 5. VFD CHECK
- 6. MANUAL TEST
- 7. RS-232C
- 8. FACTORY PRESET
- 9. AD DATA CHECK
- 10.IF STATUS (Input function status)
- 11.DOCK CHECK
- 12.XM CHECK
- 13.DAB CHECK
- 14.HDMI AUDIO
- 15.HDMI INFORMATION
- 16.HDMI SELECT
- 17.VIDEO CONVERSION
- 18.MODEL
- 19.VERSION/CHECK SUM
- 20.DATE
- 21. DSP CHECK
- DISPLAY DATA
- IC DATA
- BLOCK DIAGRAM
- PRINTED CIRCUIT BOARDS
- PIN CONNECTION DIAGRAMS
- SCHEMATIC DIAGRAMS
- REPLACEMENT PARTS LIST
- REMOTE CONTROL
- Adjusting the system parameters
YSP-500/HTY-750
29
YSP-500/HTY-750
• History of protection function
When the protection function has worked, its history is
stored in memory with a backup. Even if no abnormal-
ity 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
self-diagnostic function is cancelled by selecting PRE-
SET RESERVED (Memory initialized) of main menu
No. 8 or when the backup data is erased.
* To clear the protection history only, use the sub-
menu No. 6 “PROTECT His (PrHist <- RESET) of
main menu No. 20”.
● プロテクションの履歴
プロテクションが働いた場合、履歴をバックアップし
て記憶しています。サービスのときに異常が認められ
なくても、バックアップが残っていれば、お客様のと
ころで起きた異常を区別できます。
プロテクションの履歴は、メインメニューNo. 8で
PRESET RESERVED（メモリーの初期化）を選んでダ
イアグを解除した場合や、バックアップが消えたとき
にはクリアされます。
※ プロテクション履歴のみクリアしたい場合は、メイ
ンメニューNo.20のサブメニューNo. 6“PROTECT
Hist（PrtHist←RESET）”でクリアできます。
Cause: Amplifier IC is abnormal.
Turning on the power without correcting the cause will
trigger the protection function to work 2 second later to
shut off the power supply.
D-I_PROTECT C
Version (1 alphabet)
DIG MUTE PRT
Cause: Control section is abnormal.
If there is an abnormality between the microprocessor and
DSP, the protection function works 25 seconds later and the
power is turned off.