HP FAX-750 Service Manual - Page 167

Error code displayed Refer to ERROR INDICATION, Beep code, In approx. 2-second cycle

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Trouble (7) Image distortion In communications At the scanner At the recorder Check: • Error code displayed (Refer to Section 1, "ERROR INDICATION" in this chapter.) • NCU PCB • Main PCB • Separation roller and its related sections • LF roller and its related gears • Solenoid and the planetary gear train • Drive motor and its harness • Main PCB • Compression springs beneath the recording head • Platen and its related gears • Solenoid and the planetary gear train • Drive motor and its harness • Main PCB [ 6 ] Others Trouble (1) When you turn the power ON, the beeper sounds. Check: • Main PCB TIP: The beeper sounds with one of the following three beep codes: Beep code Beep code 1 Beep code 2 Beep code 3 In approx. 2-second cycle of LHLHLHLHm HLHLLHLHm HLHLHLHLm Defective device RAM EEPROM Program ROM H: Beeps at 1.5 kHz for 0.1 second L: Beeps at 1.2 kHz for 0.1 second m: 0.5-second mute Between L and H, H and L, or L and L is a 0.1-second pause each. VI - 16

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VI
- 16
Trouble
Check:
(7)
Image distortion
In communications
At the scanner
At the recorder
•
Error code displayed (Refer to Section 1, "ERROR INDICATION"
in this chapter.)
•
NCU PCB
•
Main PCB
•
Separation roller and its related sections
•
LF roller and its related gears
•
Solenoid and the planetary gear train
•
Drive motor and its harness
•
Main PCB
•
Compression springs beneath the recording head
•
Platen and its related gears
•
Solenoid and the planetary gear train
•
Drive motor and its harness
•
Main PCB
[ 6 ]
Others
Trouble
Check:
(1)
When you turn the power ON,
the beeper sounds.
•
Main PCB
TIP:
The beeper sounds with one of the following three beep
codes:
Beep code
In approx. 2-second cycle of
Defective device
Beep code 1
LHLHLHLHm
RAM
Beep code 2
HLHLLHLHm
EEPROM
Beep code 3
HLHLHLHLm
Program ROM
H:
Beeps at 1.5 kHz for 0.1 second
L:
Beeps at 1.2 kHz for 0.1 second
m:
0.5-second mute
Between L and H, H and L, or L and L is a 0.1-second pause
each.