Brother MFC 4550, Service Manual

Page: 130 / 191

V –
48
MFC6550MC/7550MC/7650MC/9500
Key & Button Entry Order (2)
Line
On/Off
FF/Cont
Print
Priority
Test/
Copy
Photo
Reset
01 02 03
13 14 15
07 08 09
19 20 21
10 11 12
22 23 24
04 05 06
16 17 18
Reduce
Enlarge/
Sort
Function Clear Tel-index Set Help
Super
Q.Scan
Resolution Mode Coverpage
Stop
Start
Shift
Hook
Hold
Speed Dial
1
4
7
5 6
2 3
8 9
0
A B C D E F
G H I J K L M N O
PQRS T U V W X YZ
status
status
Redial / Pause
Record Erase
Speaker H L
Play
MFC 7550MC
FAX PRINTER COPIER SCANNER PC FAX MESSAGE CENTER
SIX
IN
ONE
Fine
Photo
S.Fine
Fax
F/ T
Voice Fax
status
3.8 Sensor Operational Check
■
Function
This function allows you to check whether the eight sensors (document front sensor, docu-
ment rear sensor, sheet feeder cover sensor, cover sensor, registration sensor, paper ejec-
tion sensor, toner sensor, and hook switch sensor) operate normally.
The LED shows the “FRRETCCVRGHATNHK” when
- the document front sensor detects no paper (FR),
- the document rear sensor detects no paper (RE),
- the sheet feeder cover is closed (TC),
- the top cover is closed (CV),
- the registration sensor detects no paper (RG),
- the paper ejection sensor detects no paper (HA),
- the toner sensor detects toner (TN), and
- the hook switch sensor detects the on-hook state (HK).
■
Operating Procedure
(1) Press the 3 and 2 keys in this order in the initial maintenance mode.
The LCD should show "FRRETCCVRGHATNHK" if the detecting conditions of the nine
sensors are as defined above.
(2) Change the detecting conditions (e.g., insert paper through the document sensors or
the registration sensor, open the sheet feeder cover or the top cover, jam paper at the
paper outlet, remove the toner cartridge, and lift up the handset), and then check that
the indication on the LCD changes according to the sensor states.
(3) To stop this operation and return the equipment to the initial maintenance mode, press
the Stop
key.