DCC730:
To enter service mode:
Press 2 keys simultaneously PLAY+STOP and then switch power on.
Display shows: 'Uxxx Dyyy Lzzz"
Commercial Version ID
Press PLAY
→ (DDU Test Mode, Channel Status Byte)
Display shows: “ERROR abcdefgh”
a: indication for main data channel 0
…
h: indication for main data channel 7
0 = NO ERROR, 1 = ERROR
Press NEXT or PREVIOUS
→ (Channel Error Rate)
Display shows: “CH x ERROR yy”
x = currently selected channel 1..9
yy = accumulated error rate
Press NEXT or PREVIOUS n times
Display shows: “CH x+n ERROR yy”
ACCUMULATED ERROR RATE TABLE
yy % ERROR
00 0
01 0-5
02 5-10
03 10-15
04 15-20
05 20-25
06 25-30
07 30-35
08 35-40
09 40-45
10 45-50
11 50-55
12 55-60
13 60-65
14 65-70
15 70-75
16 75-80
17 80-85
18 85-90
19 90-95
20 95-100
REMARK ERROR RATE:
Channel 1-8 Error Rate =< 01 : GOOD
Error Rate > 01 : BAD clean/check head
Channel 9 (aux) Error Rate =< 11 : GOOD
Error Rate > 11 : BAD clean/check head