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Great manual, great price. Has a few of the basic operating instructions that most service manuals leave out. Complete instructions for disassembling board by board, safety precautions, schematics, complete parts list.
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I am very pleased with the service manual for my RT-909. This was an easy purchase and great procuct, and much cheaper than other venues i had looked at. This web site is now listed in my favorites list. KEEP UP THE GOOD WORK. THANKS. J. BROWN
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A very well written and easy to understand manual.
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There was no problem at all.After paying i had to wait only a few hours,than i could
download the manual in best pdf-quality.
Thank You !
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I found this service manual to be complete in every detail except for troubleshooting charts. It would be helpful if it had a set of troubleshooting charts; however it is a very good manual otherwise and for the price it is very well worth it.
System Error
When the micro-computer detects a trouble, the following information is displayed on the FLD.
1. Trouble in DSP If communication with DSP1(Q610) is troubled more than 2 seconds, FLD shows below.
E
R
R
O
R
D
S
P
R
O
M
* This display stays and sound is muted.
2. Trouble in EEPROM If data from EEPROM (ICS21) does not match, FLD shows below.
C
L
E
A
R
M
E
M
O
R
Y
* After displaying it, Back-up Data is reset to default.
3. Trouble in EEPROM I/F If communication with EEPROM(ICS21) is troubled more than 2 seconds, FLD shows below.
E
R
R
O
R
E
E
P
I
F
4. Trouble in 5V Supply If 5V supply to DIGITAL/AUDIO PCB is troubled, FLD shows below.
E
R
R
O
R
P
O
W
5
V
5. Trouble in 5V Supply If 5V supply to P604(DSP/CPU PCB) is troubled, FLD shows below.
P
R
O
T
E
C
T
* If a trouble is detected upon turning on the power, CPU turns off the speaker relay. And if the trouble is not recovered within 2 seconds, CPU turns the unit into stand-by. If DC offset or over current is detected while the power is on, CPU turns off the speaker relay. If overheat or some trouble is detected on the main transformer, CPU turns the unit into stand-by immediately.
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