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FAX-L1000 Chapter 5: Appendix
3.1.4 Maintenance and service
a) Troubleshooting
The fax does not recognize the DRAM boards even when the test mode D-
RAM test is executed.
Solutions: (1) Check that the DRAM boards are securely connected.
(2) Replace the DRAM board.
(3) Replace the SCNT board.
b) Signal description
SCNT board (J1)
,/,/
,/,/
,/ Memory board
J1 Memory Signal name Description
A1 . 1 DGND Ground
A2 . 2 VD0 Data signal
A3 . 3 VD1 Data signal
A4 . 4 VD2 Data signal
A5 . 5 VD3 Data signal
A6 . 6 VD4 Data signal
A7 . 7 VD5 Data signal
A8 . 8 VD6 Data signal
A9 . 9 VD7 Data signal
A10 / 10 +VB Logic drive voltage
A11 . 11 N.C Not connected
A12 . 12 AX0 Address/data signal
A13 . 13 AX1 Address/data signal
A14 . 14 AX2 Address/data signal
A15 . 15 AX3 Address/data signal
A16 . 16 AX4 Address/data signal
A17 . 17 AX5 Address/data signal
A18 . 18 AX6 Address/data signal
A19 . 19 AX10 Address/data signal
A20 . 20 N.C Not connected
A21 / 21 VD8 Data signal
A22 . 22 VD9 Data signal
A23 . 23 VD10 Data signal
A24 . 24 VD11 Data signal
A25 . 25 VD12 Data signal
A26 . 26 VD13 Data signal
A27 . 27 VD14 Data signal
A28 . 28 AX7 Address/data signal
A29 . 29 N.C Not connected
A30 / 30 +VB Logic drive voltage
A31 . 31 AX8 Address/data signal
A32 . 32 AX9 Address/data signal