# Prerecorded DCC Pavarotti (Pavarotti in hyde park) no sound at all

**URL:** https://forum.dccmuseum.com/t/prerecorded-dcc-pavarotti-pavarotti-in-hyde-park-no-sound-at-all/616
**Category:** Music, Cassettes, Recordings
**Created:** [October 14, 2020, 1:37pm UTC](https://forum.dccmuseum.com/t/prerecorded-dcc-pavarotti-pavarotti-in-hyde-park-no-sound-at-all/616 "2020-10-14T13:37:01Z")
**Posts on this page:** 1
**Showing post:** 13

<div class="post-metadata">

### Author: ![pvdm](https://forum.dccmuseum.com/user_avatar/forum.dccmuseum.com/pvdm/32/838_2.png) [@pvdm](https://forum.dccmuseum.com/u/pvdm)
#### Post date: [October 26, 2020, 10:07am UTC](https://forum.dccmuseum.com/t/prerecorded-dcc-pavarotti-pavarotti-in-hyde-park-no-sound-at-all/616/13 "2020-10-26T10:07:42Z")

</div>

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
```

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