Service manual

UX-68DE
FO-78DE
CHAPTER 2. ADJUSTMENTS
[1] Adjustments
General
Since the following adjustments and settings are provided for this model,
make adjustments and/or setup as necessary.
1. Adjustments
Adjustments of output voltage (FACTORY ONLY)
1. Install the power supply unit in the machine.
2. Set the recording paper and document.
3. When the document is loaded, power is supplied to the output lines.
Confirm that outputs are within the limits below.
Output voltage settings
2. IC protectors replacement
ICPs (IC Protectors) are installed to protect the motor driver circuit.
ICPs protect various ICs and electronic circuits from an overcurrent con-
dition.
The location of ICPs are shown below:
1DG
2 +5V
3MG
4MG
5 +24V
6 +24V
7DG
8 PSAVE
2 – 1
TEL/LIU PWB
POWER SUPPLY PWB
CNL IUA
CN2
CNPW
CONTROL PWB
CNL IUB
CNLIUB
CNLIUA
Output Voltage limits
+5V 4.75V ∼ 5.25V
+24V 24.0V ∼ 26.0V
Connector
No. CNPW
Pin No.
CNLIUA
CNPW
CONTROL PWB
(TOP SIDE)
CNMT
FU100
CNLIUB
(1) FU100 (KAB2402) is installed in order to protect IC’s from an over-
current generated in the motor drive circuit. If FU100 is open, replace
it with a new one.
3. Settings
Setting is not required since the required mode is TONE ONLY.