Engine Error 120X: Head Drive Ic Error; Engine Error 121X: Head Temperature Error - Seiko I Infotech IP-6600 Maintenance Manual

5.5.2.14

Engine error 120X: Head drive IC error

＜Description＞
The piezo drive IC on a head is too hot (85 °C or higher) or too low (-10 °C or
lower).
The head drive voltage + 4 V that is supplied to the VDD board is generated from 36
V power supply.
The ICB1 board that has a 2nd voltage control circuit generates the accurate voltage
needed for the head. The 2nd voltage control circuit is easy to hot.
This error is check at all times.
＜Defective module＞
(1) ICB1 board
(2) Head cable
(3) Head
＜Measure to be taken＞
(1) Check temperature of the head drive circuit on the ICB1 board. If it is extremely
high, check short-circuit of the head and head cable corresponding to the element
using a tester. Short-circuit may be caused by incorrect insertion of the head cable,
internal failure of the head, or foreign matter attached to the ICB1 board.
(2) Replace the head.
(3) Replace the ICB1 board.
5.5.2.15

Engine error 121X: Head temperature error

x: 0= No. 1 head (Bk), 1= No. 2 head (Lm), .....5= No. 6 head (Lc)
＜Description＞
The head temperature is too low or too high (- 10 °C or lower, 85 °C or higher).
(The that measure the PZT temperature malfunction.)
When the head temperature rises at normal print, the temperature control such as
addition of wait time words so that the temperature does not exceed 40 °C .
＜Defective module＞
(1) Head cable
(2) ICB1 board
(3) Head
＜Measure to be taken＞
(1) When the actual environmental temperature is not abnormal, there is a possibility
of cut of the circuit.
Identify the errored color head from the lowest digit figure in the error number
and check whether cables are connected securely and the head cable is not
damaged.
(2) The A/D conversion circuit is on the ICB1 board. Therefore, replace the ICB1
board.
(3) Rarely there is a possibility of the thermistor malfunction in the head.
Section 5 Troubleshooting (Engine and SCSI Controllers)
SIIT CONFIDENTIAL
5-27