Sanyo FISHER DVD-1500 AU, Руководство по обслуживанию

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CHECK FLOW AND TROUBLE SHOOTING
(Power on)
Power on
Problem/symptom Check Waveform Schematic diagram Reference data
CN803 (PH5P)
1 Cannot be energised Check for a voltage of 5 V/9 V.
Check for the HRST. (17)(19) K
Turn off power at once. Check SPINDLE/SLED servo system. BA6849 voltage table (4)
2 SPINDLE motor runs away. Check for FLOW signal. (44)(45) A , B
Check and trace control signals. (46) A , B
Turn off power at once. Check SPINDLE/SLED servo system.
3 SLED motor runs away. Check for FLOW signal. I BA5931 voltage table (5)
Check and trace control signals. (47)(48)
(Tray open / close)
Tray open/close
Problem/symptom Check Waveform Schematic diagram Reference data
Check for motor drive input/output. (1) J BA5931 voltage table (6)
1 Neither opens nor closes Check mechanical switch & its output. (16) J
Check for HRST & FRST. (18)(19) J
2 Opens but immediately closes. Check for motor drive input/output. (1) J BA5931 voltage table (6)
Check mechanical switch & its output. (16) J
3 Opens but motor does not stop.Check for motor drive input/output. (1) J BA5931 voltage table (6)
Check mechanical switch & its output. (16) J
4 Loading speed abnormal Check for motor drive input/output. (1) J BA5931 voltage table (3)
An extract from "GENERAL FLOW"
An extract from "GENERAL FLOW"
Turn on power.
Tray close/closed
"LASER" lights.
Pickup returns.
8/12 cm identification
Identifies disk
Sets mode
INIT processing of TC9461
Laser off 20 ms
Laser on.
Focus search
Automatic alignment
Tracking balance
Focus balance
Focus gain
Tracking gain
RF gain
Check for connector
and power source.
Turn on power.
Tray close/closed
"LASER" lights.
Pickup returns.
8/12 cm identification
Identifies disk
Sets mode
NIT processing of TC9461
Laser off 20 ms
Laser on.
Focus search
Depress open/close
switch.
Tray opens.
Place a disk
on tray.
Depress open/close
switch.
Tray open/close