Service manual

3. DIAGNOSTIC CHECK
3.52 Service Manual BSM-4100
SELF-TEST-PRO No.3
This check program checks the recording quality. There are the following three
recording patterns for scale, character and thermal array head checks.
The recording pattern changes automatically after the NIBP INTERVAL key is
pressed for the recording start. The recording starts soon after the black square on
the paper is detected.
To stop the recording, press the NIBP INTERVAL key again.
• Scale Check: Checks the circuit related to the scale recording in the recorder
control block on the MAIN board. If the recording has something wrong, the
MAIN board will be faulty.
• Character Check: Checks the circuit related to the character recording in the
recorder control block on the MAIN board. If the recording has something
wrong, the MAIN board will be faulty.
• Thermal Array Head Check: Checks the thermal array head condition and RAM
for the storage of the data for the heat elements of the head. If there is a dot
missing, faint dot or dark and faint dots mixed on the paper, check that the
thermal array head is firmly attached and is not dirty. Replace the thermal array
head with a new one if the head is cleaned but the problem still occurs. If the
recording pattern has something wrong, the MAIN board will be faulty.
Scale Check
Character Check
Thermal Array Head Check