Fukuda Denshi FCP-7101, Service Manual

Page: 30 / 170

Chapter 2
2 - 10
●
Recording paper is fed, but printing and waveform recording are not
performed.
Item to Check Method of Checking and Corrective Action Place to Check
Connector Verify that the thermal print head cable is securely
attached to connector P3 on the MAIN BOARD.
Verify also that the soldering of connectors P3 is free
of defect.
Verify that the thermal print head and thermal print
head cable are securely connected and that the
thermal print head cable is not broken. P3
Thermal print head cable
REFERENCE
P5-33
Power supply
Verify that pins No. 1
，
2
，
13 and 14 of P3 on the
POWER BOARD are supplied with +24 volts during
recording.
P3 pins 1
，
2
，
13and 14
REFERENCE
P5-33
Control signal When recording, verify that the signals of
[LATCH*] (pin No. 10), [CLOCK] (pin No. 9), and
[STROBE1*-4*] (pins No. 7and8) of P3 on the
MAIN BOARD are not fixed at "H" or "L."
If the above is abnormal, check the signals for IC7B
to IC8, 56-59. P3 pins 7 to 10
IC8pins 56 to59
REFERENCE
P5-29,33
Overheat Printing is not performed if the temperature of the
thermal head is 60
°
C or higher.
Check that IC15 pin 7 is not at “L” level.
Check the maker maintenance status to make sure
that the temperature of the thermal head is not set to
60
°
C or higher.
IC15 pin 7
Maker maintenance status
REFERENCE
P5-33, P3-14
●
Recording paper is not fed
Item to Check Method of Checking and Corrective Action Place to Check
Connector
Check that the motor cable is securely connected and
that it is not broken.
P5
Motor cable
REFERENCE
P5-34
Control signal While recording, check that a signal is present at P5
pins 1 through 4 on the MAIN BOARD.
Also check that the level is not "L" at Q6 and Q7
pins 3.
If a signal is present, the motor may be faulty. P5
REFERENCE
P5-34
●
A certain lead record appears as a baseline.
Item to Check Method of Checking and Corrective Action Place to Check
Patient cable Check the patient cable. for a break and check the
connection staus. Patient cable
OP Amp of ECG
AMP, A/D converter
and limiter Check that the operation of the OP Amp, IC23 to
IC27, and A/D converter IC37 (which are related to
the baseline lead) and the transistors Q13 to Q21 for
the protection against excess input are not shorted. IC23 to IC27, IC37,Q13 to
Q21
REFERENCE
P5-35,36