Xerox WorkCentre Pro 423, Service Manual

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03/02 2-3 Level 2 Troubleshooting
WorkCentre Pro 423/428 2-45 CHAPTER 2 TROUBLESHOOTING
T.30 PROTOCOL TRACE
Note 1) * shows a spare bit set up to “0”
Note 2) Data before bit 64 goes to No 1
Note 3) EXT: extend field
0 -> no data in the next Byte
1 -> data in the next Byte
Ref: JBIG: Joint Bi-Level Image Coding Experts Group… Binary image coding system: Used for B/W fax.
JPEG: Joint Photographic Coding Experts Group… Multi-level image coding system: Used for colour fax
bit No 72 71 70 69 68 67 66 65 80 79 78 77 76 75 74 73 88 87 86 85 84 83 82 81 96 95 94 93 92 91 90 89 104 103 102 101 100 99 98 97 112 111 110 109 108 107 106
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
E 1 H F J F D P E 8 8 L L G I S E H * * H O R H E T T T T * * * E * I I * B C C E * * 6 4 3
X 2 U C P H N M X 5 5 E E A L A X F F V S K X 4 4 4 4 X A P F 1 3 X X X X
T F G T 0 B G T H L M T I X R A M T 4 4 4 4 T T 0 4 T 12 8 6
00 00
bit No 72 71 70 69 68 67 66 65 80 79 78 77 76 75 74 73 88 87 86 85 84 83 82 81 96 95 94 93 92 91 90 89 104 103 102 101 100 99 98 97 112 111 110 109 108 107 106 105
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
E 1 H F J F D P E 8 8 L L G I S E H * * H O R H E T T T T * * * E * I I * B C C E * * 6 4 3 1 6
X 2 U C P H N M X 5 5 E E A L A X F F V S K X 4 4 4 4 X A P F 1 3 X X X X 2 0
T F G T 0 B G T H L M T I X R A M T 4 4 4 4 T T 0 4 T 12 8 6 0 0
00 00
Table 1
Description of classification: C:Colour fax, E:Extensive fax function, F:Code function,
I:Ifax (internet fax), - :Other
Bit Item Description [DIS/DTC ->1:capable, 0->not capable,
Classif DCS-> 1:Signal send, 0:No signal send]
ication No.
I 1 SIM Ifax simple mode capability
I 2 REAL Ifax real time internet fax
- 33 IGN Invalid field signal capability (Explanation omitted)
F 34 SPC F Code Multiple selection polling capability. Set DCS to 0. See Table 2
F 35 SUB F code polling sub-address capability. Set DCS to 0. See Table 2
C 36 T43 Colour fax T43 encoding capability. Select T43 or JPEG (bit 63) for encoding.
C 37 INT Colour fax plain interleave. Valid only when bit 36 is 1.
- 38 PCM ADPCM capability. (Explanation omitted)
F 47 SEP F code selective polling capability. Set DCS to 0. See Table 2
F 49 SAC F code sub-address capability. See Table 2
F 50 PWC F code password capability. See Table 2
- 51 - Bits 51 to 57 file transfer capability. (Explanation omitted)
- 59 - Bits 59 to 65 mixed mode. (Explanation omitted). Bits 66, 67 (Explanation
omitted)
C 68 JPG Colour fax JPEG encoding capability. For 1, set bit 27 (ECM) also to 1
C 69 FC Colour fax full colour capability. Valid only when bit 68 is 1
C 70 HUF Huffman code table indication. Valid only when bit 68 is 1. Set
DIS to 0. compress rate depends on the code t,
C 71 12 12 bit pixel capability. Set 0 for 8 bits/pixel. Valid only when bit 68 is 1
C 73 SAM Colour fax no sub sampling. (L*,a*,b*->1:1:1). Set 0 for 4:1:1.
Valid only when bit 68 is 1
C 74 ILL Colour fax non standard irradiation light. Set 0 for CIE standard
irradiation light D50. Valid only when bit 68 is 1
C 75 GAR Colour fax non standard gamut range. Set 0 for the standard range. Valid only
when bit 68 is 1.
- 81 HKM HKM key. (Explanation omitted)
- 82 RSA RSA key. (Explanation omitted)
- 83 OVR Over-ride mode. (Explanation omitted)
- 84 HFX HFX40 code. (Explanation omitted)
- 87 HFI HFX40-I hushing capability. (Explanation omitted)
- 92 T44 Bits 92 to 95 mixed raster content mode. (Explanation omitted)
C 97 C34 Colour fax 300 x 300 or 400 x 400 pixels per 25.4mm capability.
C 98 C100 Colour fax 100 x 100 pixels per 25.4mm capability.
- 99 BFT Binary file transfer capability. (Explanation omitted)
I 101 IP Ifax selection polling. Set DCS to 0
I 102 IA Ifax routing address. When this address is used for DCS, bits 49 and 50 of other
F codes may a be set to 1
ITU-T 2000
2001.11 TDC/DP3G
See T1
for
850:T.85 JBIG
option capability
0: disabled
1: enabled, Set bits
78 and 27 to 0
85B:T.85 JBIG
option capability
0: disabled
1: enabled, Set bit
27 to 1
See Table 1 for bits 81 to
103
See Table 1 for bits
75 Colour
LET: Letter size (215.9 x 279mm)
0: disabled, 1: enabled. (Receiving
capability for A4 size is required for
DIS/DTC)
LEG: Legal size (215.9 x 355.6mm)
0: disabled, 1: enabled. (Receiving
capability for A4 size is required for
DIS/DTC)
See Table 1 for bits
68-71 Colour Fax
See
600 1:600 x 600 pixels / 25.4mm Yes, 0:No
1200 1:1200 x 1200 pixels / 25.4mm Yes, 0:No
3x6 1:300 x 600 pixels / 25.4mm Yes, 0:No
3 x 8 1:300 x 800 pixels / 25.4mm Yes, 0:No
6 x 12 1: 600 x 1200 pixels / 25.4mm Yes, 0:No
Frame name FCF Description
PWD C1 Password. A password enters FIF. This may be sent only when /DIS bit 50 is 1
SEP A1 Selective polling. A sub-address enters FI. The sub-address indicates a specific document
number if used with PSA. This may be sent only when /DIS bit 47 is 1
PSA 61 Polling sub-address. A sub-address enters FIF. This may be sent only when /DIS bit 35 is 1
SUB C2/C3 Sub-address. The called party’s sub-address enters FIF. This may be sent only when /DIS bit 49 is 1
SID A2/A3 Transmitter ID. The transmitter’s ID (local office ID). This may be sent only when /DIS bit 50 is 1
The DIS-declared receiver capability determines frames (signals). Each frame in the table should be
sent prior to DCS. When sending a frame, set DCS bits 49 and 50, or DTC bits 35, 47 and 50 to 1. A
password is a 20-digit ASCII code consisting of 0 to 9, # and *. A sub-address is a 20-digit ASCII code
consisting of 0 to 9.
<Colour fax> A colour document is read with a scanner of 200 dpi or higher resolution and an image
data of 8 x 8 bits or more. CIELAB data (represented by L*,a*,b*) is transmitted after encoding
(compression) by JPAG or T.43. ECM is essential for G3.
Colour code sampling of “L*,a*,b* -> 4:1:1” from CIELAB data of a* (+:red, -:green) and b* (+:yellow,
-:blue) means to reduce a* and b* (colour component data) for L* (brightness component data) to ¼.
1:1:1 means no sub-sampling (reduction). If only L* is used and both a* and b* are set to 0, the
machine is set to black and white fax mode.
Table 2
Frames (signals) sent from transmitter in F code communication (Frame names are printed in the protocol)