Hitachi DV-P335 Service Manual
SERVICE MANUAL
TK No. 9303E
DV-P335E
DV-P335E(UK)
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
DVD PLAYER
2003 Digital Media Division, TokaiApril
CONTENTS
1 CAUTIONS FOR SAFETY IN PERFORMING
REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
1-1 LASER BEAM SAFETY PRECAUTIONS . . . . . . . . 1-1
1-2 IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . 1-2
1-2-1 Product Safety Notice . . . . . . . . . . . . . . . . . . . . . 1-2
1-2-2 Precautions during Servicing. . . . . . . . . . . . . . . . 1-2
1-2-3 Safety Check after Servicing. . . . . . . . . . . . . . . . 1-3
1-3 STANDARD NOTES FOR SERVICING. . . . . . . . . . 1-4
1-3-1 Circuit Board Indications . . . . . . . . . . . . . . . . . . . 1-4
1-3-2 Instructions for Connectors . . . . . . . . . . . . . . . . . 1-4
1-3-3 How to Remove/Install Flat Pack-IC . . . . . . . . . . 1-4
1-3-4 Instructions for Handling Semi-conductors . . . . . 1-6
2 GENERAL INFORMATION. . . . . . . . . . . . . . . . .2-1
2-1 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2-2 COMPARISON OF MODELS . . . . . . . . . . . . . . . . . 2-2
2-3 OPERATING CONTROLS AND FUNCTIONS . . . . 2-4
3 MAINTENANCE AND INSPECTION. . . . . . . . . .3-1
3-1 TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . 3-1
3-2 FIRMWARE RENEWAL MODE. . . . . . . . . . . . . . . . 3-7
3-2-1 How to Update the Firmware Version . . . . . . . . . 3-7
3-2-2 How to Verify the Firmware Version . . . . . . . . . . 3-7
SCHEMATIC AND BLOCK DIAGRAMS/CBA'S
1 SCHEMATIC DIAGRAMS/CBA’S AND TEST POINTS . 1
2 WIRING DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 SCHEMATIC DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . 4
3-1 DVD Main 1/3 Schematic Diagram . . . . . . . . . . . . . . . 4
3-2 DVD Main 2/3 Schematic Diagram . . . . . . . . . . . . . . . 5
3-3 DVD Main 3/3 Schematic Diagram . . . . . . . . . . . . . . . 7
3-4 AV 1/3 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . 8
3-5 AV 2/3 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . 9
3-6 AV 3/3 & Function Schematic Diagram . . . . . . . . . . . 10
4 WAVEFORMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5 CIRCUIT BOARD DIAGRAMS . . . . . . . . . . . . . . . . . . . 12
5-1 AV CBA Top View . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5-2 AV CBA Bottom View. . . . . . . . . . . . . . . . . . . . . . . . . 13
5-3 Function CBA Top/Bottom View . . . . . . . . . . . . . . . . 14
6 BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6-1 System Control/Servo Block Diagram . . . . . . . . . . . . 15
6-2 Digital Signal Process Block Diagram . . . . . . . . . . . . 16
6-3 Video/Audio Block Diagram. . . . . . . . . . . . . . . . . . . . 17
6-4 Power Supply Block Diagram . . . . . . . . . . . . . . . . . . 18
7 SYSTEM CONTROL TIMING CHARTS . . . . . . . . . . . . 19
8 IC PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . 20
9 LEAD IDENTIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . 21
4 DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . .4-1
4-1 CABINET DISASSEMBLY INSTRUCTIONS. . . . . . 4-1
4-1-1 Disassembly Flowchart . . . . . . . . . . . . . . . . . . . . 4-1
4-1-2 Disassembly Method. . . . . . . . . . . . . . . . . . . . . . 4-1
5 EXPLODED VIEW AND PARTS LIST . . . . . . . .5-1
5-1 EXPLODED VIEW. . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5-2 REPLACEMENT PARTS LIST. . . . . . . . . . . . . . . . . 5-2
5-2-1 Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . 5-2
5-2-2 Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . 5-3
D
R
1
CAUTION FOR SAFETY IN PERFORMING REPAI
1-1 LASER BEAM SAFETY PRECAUTIONS
This DVD player uses a pickup that emits a laser beam.
Do not look directly at the laser beam coming
from the pickup or allow it to stri ke against your
skin.
The laser beam is emitted from the location shown in the figure. W hen checki ng the laser diode , be sure to keep
your eyes at leas t 30cm away f rom the pi ckup lens wh en the diod e is turned on. Do not l ook directl y at the las er
beam.
Caution: Use of controls and a djustments, or doing proce dures other than those s pecified herein, may r esult in
hazardous radiation exposure.
rive Mecha Assembly
Laser Beam Radiation
Laser Pickup
Turntable
CAUTION - VISIBLE LASER
RADIATION WHEN OPEN AND
INTERLOCK DEFEATED.
AVOID EXPOSURE TO BEAM.
Location: Inside Top of DVD mechanism.
1-1
1-2 IMPORTANT SAFETY PRECAUTIONS
1-2-1 Product Safety Notice
Some electrical and mechanical parts have special
safety-related charac teristics which are often not evident from visual inspection, nor can the protection they
give necessarily be obtained by replacing them with
components rated for higher voltage, wattage, etc.
Parts that have special s afe ty c har ac te rist ic s ar e i den tified by a ! on schematics and in parts lists. Use of a
substitute replacement that does not have the same
safety characteristics as the recommended replacement part might create shock, fi re, and/or other hazards. The Product’s Safety is under review
continuously and new instructions are issued whenever appropriate. Prior to shipment from the factory,
our products are carefully inspected to confirm with
the recognized prod uct safety and electrical codes of
the countries in whic h th ey are to be sold. However, in
order to maintain such comp lianc e, it is equ ally impor tant to implement the following precautions when a set
is being serviced.
1-2-2 Precautions during Servicing
A. Parts identified by the ! symbol are critical for
safety. Replace only with part number specified.
B. In addition to safety, other parts and assemblies
are specified for conformance with regulations
applying to spur ious rad iation. T hese m ust also be
replaced only with specified re pla ce men ts.
Examples: RF converters, RF c ables, noise blocking capacitors, and noise blocking filters, etc.
C. Use specified internal wiring. Note especially:
1)Wires covered with PVC tubing
2)Double insulated wires
3)High voltage leads
D. Use specified insulating materials for hazardous
live parts. Note especially:
1)Insulation tape
2)PVC tubing
3)Spacers
4)Insulators for transistors
E. When replacing AC primary side components
(transformers, power cord, etc.), wrap ends of
wires securely about the terminals before soldering.
F. O bs erv e t hat the wi r es do n ot co ntact h eat pr od uc -
ing parts (heatsinks, oxide metal fil m re sisto rs, fus ible resistors, etc.).
G. Check that replaced wires do not contact sharp
edges or pointed parts.
H. When a power cord has been r eplaced, ch eck that
5 - 6 kg of force in any direction will not loosen it.
I. Also check areas surrounding repaired locations.
J. Be careful that foreign objects (screws, solder
droplets, etc.) do not remain inside the set.
K. Crimp type wire connector
The power tr ansformer uses crimp type connectors
which connect the power cord and the primary side
of the transformer. When replacing the transformer,
follow these steps carefully and precisely to prevent
shock hazards.
Replacement procedure
1)Remove the old connector by cutting the wires at a
point close to the connector.
Important: Do not re-use a connector. (Discard it.)
2)Strip about 15 mm of the insulation from the ends
of the wires. If the wires are stranded, twist the
strands to avoid frayed conductors.
3)Align the lengths of the wires to be connected.
Insert the wires fully into the connector.
4)Use a crimping tool to crimp the metal sleeve at its
center. Be sure to crimp fully to th e complete closure of the tool.
L. When connecting or disconnecting the internal
connectors, first, discon nect the AC plug from the
AC outlet.
1-2
r
e)
Z
1-2-3 Safety Check after Ser vicing
Examine the area surrounding the repaired location for
damage or deterio ration. Observe that screws , parts,
and wires have been returned to their original positions. Afterwards, do the following tests and confirm
the specified values to verify compliance with safety
standards.
1. Clearance Distance
When replacing primary circuit components, confirm
specified cleara nce distanc e (d) and (d’) between sol dered terminals, and between terminals and surrounding metallic parts. (See Fig. 1-2-1)
T able 1-2-1 : Ratings for selected area
AC Line Voltage Clearance Distance (d) (d’)
Chassis or Secondary Conducto
Primary Circuit Terminals
dd'
230 V
Note: This table is unofficial and for reference only.
Be sure to confirm the precise values.
≥ 3 mm(d)
≥ 6 mm(d’)
2. Leakage Current Test
Confirm the specified (or lower) leakage current
between B (earth ground, power cord plug prongs)
and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and
output terminals, microphone jacks, earphone jacks,
etc.) is lower than or equal to the specified value in the
table below.
Measuring Method (Power ON) :
Insert load Z between B (earth ground, power cord
plug prongs) and exposed accessible parts. Use an
AC voltmeter to measure acr oss the ter minals of l oad
Z. See Fig. 1-2-2 and the following table.
Table 1-2-2: Leakage current ratings for selected areas
AC Line Voltage Load Z Leakage Current (i)
230 V
2kΩ RES.
Connected in parallel
50kΩ RES.
Connected in parallel
i≤0.7mA AC Peak
i≤2mA DC
i≤0.7mA AC Peak
i≤2mA DC
Exposed Accessible Part
One side of
B
Power Cord Plug Prongs
One side of power cord plug
Antenna terminals
A/V Input, Output
Fig. 1-2-1
AC Voltmeter
(High Impedanc
Fig. 1-2-2
prongs (B) to:
RF or
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
1-3
1-3 STANDARD NOTES FOR SERVICING
O
P
P
1-3-1 Circuit Board Indications
1. The output pin of the 3 pin Regulator ICs is indicated as shown.
Top View
Input
ut
2. For other ICs, pin 1 and every fifth pin are indicated
as shown.
In
in 1
3. The 1st pin of every male connector is indicated as
shown.
in 1
Bottom View
5
10
1-3-3 How to Remove / Install Flat
Pack-IC
1. Removal
With Hot-Air Flat Pack-IC Desoldering Machine:.
(1) Prepare the hot-air flat pack-IC desoldering
machine, then apply hot air to the Flat Pack-IC
(about 5 to 6 seconds). (Fig. 1-3-1)
Fig. 1-3-1
(2) Remove the flat pack-IC with tweezers while apply-
ing the hot air.
(3) Bottom of the flat pack-IC is fixe d with glue to the
CBA; when removing entire fl at pack-IC, fir st apply
soldering iron to center of the fla t pack-IC and hea t
up. Then remove (glue will be melted). (Fig. 1-3-6)
(4) Release the flat pack-IC from the CBA using twee-
zers. (Fig. 1-3-6)
1-3-2 Instructions for Connectors
1. When you connec t o r dis con nect the F FC (Flex ib le
Foil Connector) cable, be sure to first disconnect
the AC cord.
2. FFC (Flexible Foil Connector) cable should be
inserted parallel into the connector, not at an angle.
FFC Cable
Connector
CBA
* Be careful to avoid a short circuit.
Caution:
1. Do not supply hot air to the chip parts around the
flat pack-IC for over 6 seconds because damage to
the chip parts may occur. Put maskin g tape a r ound
the flat pack-IC to protect other parts from damage.
(Fig. 1-3-2)
2. The flat pack-IC on th e CB A i s affixed with glue, so
be careful not to break or damage the foil of each
pin or the solder lands under the IC when removing
it.
Hot-air
Flat Pack-IC
Desoldering
CBA
Masking
Tape
Tweezers
Machine
Flat Pack-IC
Fig. 1-3-2
1-4
With Soldering Iron:
F
F
S
rp
or
n
(1)Using desoldering braid, remove the solder from all
pins of the flat pack-IC. Wh en you use solder flux
which is applied to all pins of the f lat pack-IC, you
can remove it easily. (Fig. 1-3-3)
lat Pack-IC
Desoldering Braid
(4) Bottom of the flat pack-IC is fixe d with glue to the
CBA; when removing entire fl at pack-IC, fir st apply
soldering iron to center of the fla t pack-IC and hea t
up. Then remove (glue will be melted). (Fig. 1-3-5)
(5) Release the flat pack-IC from the CBA using twee-
zers. (Fig. 1-3-6)
Note:
When using a sold ering iron, care must be taken
to ensure that the flat pack-IC is not being hel d by
glue. When the flat pack-IC is removed from the
CBA, handle it ge ntl y bec au se it may be damaged
if force is applied.
Soldering Iron
Hot Air Blower
Fig. 1-3-3
(2) Lift each lead of the flat pack-IC upward one by
one, using a sharp pin or wire to which sold er will
not adhere (iron wir e). When heati ng the pins, us e
a fine tip soldering iron or a hot air desoldering
machine. (Fig. 1-3-4)
Iron Wire
Soldering Iron
To Solid
Mounting Point
Sha
Fig. 1-3-5
Pin
ine Tip
oldering Iron
CBA
Fine Tip
Soldering Iro
Fig. 1-3-4
(3)B ottom of the flat pack-IC is fixed with glue to the
CBA; when removing enti re flat pack-IC, fi rst apply
soldering iron to c en ter o f th e f lat pack-I C an d h eat
up. Then remove (glue will be melted). (Fig. 1-3-6)
(4)Re lease the fla t pack-IC from the CBA us ing twee-
zers. (Fig. 1-3-6)
Tweezers
Flat Pack-IC
With Iron Wire:
(1)Using desoldering braid, remove the solder from all
Fig. 1-3-6
pins of the flat pack-IC. Wh en you use solder flux
which is applied to all pins of the f lat pack-IC, you
can remove it easily. (Fig. 1-3-3)
(2) Affix the wire to a workbench or solid mounting
point, as shown in Fig. 1-3-5.
(3) While heating the pins using a fine tip soldering
iron or hot air blower, pull up the wire as the solde r
melts so as to lift the IC leads from the CBA contact
pads as shown in Fig. 1-3-5
1-5
2. Installation
P
i
d
(1) Using desoldering braid, remove the solder from
the foil of each pin of the flat pack-IC on the CBA
so you can install a replac ement flat pack-IC more
easily.
(2) The “I” mark on the flat pack-IC indicates pin 1.
(See Fig. 1-3-7.) Be sure this m ark matches the 1
on the PCB when position ing for installation. Then
presolder the four corners of the flat pack-IC. (S ee
Fig. 1-3-8.)
(3)Solder all pins of the flat pack-IC. Be sure that none
of the pins have solder bridges.
Example :
in 1 of the Flat Pack-IC
s indicated by a " " mark.
Fig. 1-3-7
1-3-4 Instructions for Handling
Semi-conductors
Electrostatic breakdown of the semi-conductors may
occur due to a po tential difference ca used by electr ostatic charge during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a gr oundin g band (1MΩ) that is properly grounded to re move any static electricity th at m ay
be charged on the body.
2. Ground for Workbench
(1) Be sure to place a conductive sheet or copper plate
with proper groundin g (1MΩ) on the workbench or
other surface, where the semi-conductors are to be
placed. Because the static electricity charge on
clothing will no t escape through the body grounding band, be careful to avoid contacting semi-conductors with your clothing.
< Incorrect >
CBA
Presolder
Flat Pack-IC
Fig. 1-3-8
CBA
< Correct >
Grounding Ban
1MΩ
CBA
1MΩ
Conductive Sheet or
Copper Plate
1-6
GENERAL INFORMATION2
2-1 SPECIFICATIONS
2-1
2-2 COMPARISON OF MODELS
A
E
G
L
V
O
A
O
T
Y
: The halftone parts are the differences from the previous model.
ITEM
Dimensional 435(W) x 55(H) x 211(D) mm 435(W) x 75(H) x 216(D) mm
Weight 1.8 kg 2.1 kg
Tray Panel Clear Silver
Color Front / Button Silver/Silver Black/Silver
Hot Stamp --- ---
PPEARANC
Ultra Vision Badge --- --Drive Speed 1x 1x
Laser 2 2
DVD/VCD/SVCD/CD-DA O / --- / --- / O O / --- / --- / O
CD-R/CD-RW/DVD-R (Video Format) O / O / O O / O / O
DVD-RAM (VR Format) --- --MP3 O O
ENERA
OSD languages
Jog Shuttle on Front --- Only switch shuttle
Headphone Jack / Volume --- / --- --- / --PAL Disc NTSC Out O --Video Out Mode NTSC/PAL/PAL60 --- / O / O --- / O / O
S-Video / Component / Composite O / O / O O / O / O
Video D/A Converter 10bit 10bit
IDE
Black Level Select --- O
Picture Control --- --Progressive Out --- --Audio D/A Converter 192kHz / 24bit 192kHz / 24bit
Digital Audio Out Optical / Coaxial O / O O / O
Dolby Digital 5.1 ch Decode --- --DTS Digital Out O O
Virtual Surround O O
UDI
Dynamic Range Compression (Dolby
Digital)
DVD Audio --- --Power on sound --- ---
Search Speed
Slow Speed 1/16, 1/8, 1/2 (FORWARD/REWIND) 1/16, 1/8, 1/2 (FORWARD only)
IP Search (Smooth 2x Play) O O
2x Play with Audio --- ---
RICK PLA
Step Forward / Reverse O / --- O / --Still Picture Select (Frame/Field) Auto Only Auto Only
DV-P335E/P335E(UK) DV-P325E/P325E(UK)
7 (English, French, Spanish
Italian, German, Swedish, Dutch)
2 to 100 (FORWARD/REWIND)
(DVD: 2, 8, 50, 100/CD: 16)
7 (English, French, Spanish
Italian, German, Swedish, Dutch)
OO
2 to 60 (FORWARD/REWIND)
(DVD: 2, 8, 30, 60/CD: 16)
2-2
ITEM
F
S
C
R
Disc Navigation O --DVD Zoom x2 / x4 / x16 O / O / --- O / O / --Program and Random Play of DVD --- --A-B Repeat O O
Repeat O O
Resume Play
EATURE
Front Panel Display Dimmer O O
Screen Saver O O
Auto Power Off O O
Jog Shuttle on Remote --- ---
REMOTE
TV Control --- ---
ONTROLLE
DV-P335E/P335E(UK) DV-P325E/P325E(UK)
O (Resume is not effected after
power off)
O
2-3
e
RGBAV TV
ANALOG
AUDIO OUT
DIGTAL
AUDIO OUT
COAXIALOPTICAL
S-VIDEO
OUT
VIDEO
OUT
LR
12345
B
C
A
2-3 OPERATING CONTROLS AND FUNCTIONS
FRONT PANEL
7
y/I
H/ED/GABC
1 6
1. y/I (POWER/STANDBY)
to switch the player to ON or OFF
(As to the indication of the Operate switch, “I” indicates
ON and “y” indicates electrical power STANDBY)
2. SKIP/FR
goes to previous chapter or track during playback;
press and hold for 1.5 seconds for a reverse search
B
3.
(PLAY)
to start or resume disc playback
REAR PANEL
82 3 4 5
4. FF/SKIP
goes to next chapter or track during playback; press
and hold for 1.5 seconds for a forward search
C
(STOP)
5.
to stop playback
A
6.
(OPEN/CLOSE)
to open/close the disc tray
7. Disc tray
8. Display
1. ANALOG AUDIO OUT JACKS
Connect to the Audio input jacks of A/V-compatible TV
or wide screen TV, Stereo system.
2. DIGITAL AUDIO OUT JACKS:
Use either an optical or coaxial digital cable to connect
to a compatible Dolby Digital receiver. Use to connect to
a Dolby Digital decoder or DTS decoder.
3. VIDEO OUT JACK
Use a video cable to connect one of the jack to Video
input on your A/V-compatible TV or wide screen TV,
Stereo system.
2-4
4. S-VIDEO OUT JACK
Use the S-Video cable to connect this jack to the SVideo jack on your A/V-compatible TV or wide screen
TV for a higher quality picture.
5. EURO A/V (SCART) JACK
Use the Euro audio/video cable to connect this jack to
the 21 pin scart jack on your A/V-compatible TV or wid
screen TV for a best quality picture.
B
o
H
s
C
h
F
g
B
G
d
.
A
Title/Chapter/Track/Time.
REMOTE CONTROL
1
SURROUND
2
A-B REPEAT
ZOOM
1
4
7
CLEAR
SUBTITLE
3
REPEAT
4
5
MODE
6
7
ANGLE
8
MENU
9
10
ENTER
11
RETURN
12
NAVIGATION
13
14
15
SEARCH OPEN/
MODE
2
56
8
0
AUDIO
DISC
SKIP
CLOSE
3
9
+10
DISPLAY
TOP MENU
SETUP
28
27
26
25
24
23
22
21
20
19
18
17
16
1. SURROUND
Press to activate the virtual sound.
2. y/I (POWER/STANDBY)
to switch the player to ON or OFF
(As to the indication of the Operate switch, “I” indicates
ON and “y” indicates electrical power STANDBY)
3. A-B REPEAT
Repeats playback of a selected section.
4. REPEAT
Repeats playback of the current disc, title, chapter or
track.
5. MODE
to set up programmed or random playback (Audio CD)
to set the virtual surround during DVD playback
6. ZOOM
enlarge DVD video image
7. CLEAR
8. ANGLE
select DVD camera angle
9. MENU
to display the menu of the DVD disc
10. ENTER
acknowledge menu selection
11. Arrow Buttons (
Move the cursor and determines its position.
12. RETURN
to return previous or remove setup menu
13. SKIP
14.
15.
16.
17.
18.
19. SKIP
20. DISC NAVIGATION
21. SETUP
22. SUBTITLE
23. TOP MENU
24. DISPLAY
25. AUDIO
26. Numerical Buttons
27.
28. SEARCH MODE
H
goes to previous chapter or track during playback; pres
and hold for 1.5 seconds for a reverse search
C
to stop playback
h
to view DVD picture in fast reverse motion
F
Press to pause Disc playback. Press repeatedly to
advance the DVD picture step by step (or one frame at
a time).
g
to view DVD picture in fast forward motion
B
to start or resume disc playback
goes to next chapter or track during playback; press an
hold for 1.5 seconds for a forward search
Press to display the first scenes of each chapter of the
title being played.
Press to enter the setup mode.
Press to select the desired subtitle language.
Press to call up the title menu.
Press to access or remove the display screen during
DVD or Audio CD playback.
Press to select a desired audio language or sound
mode.
Press to directly select a Track (Audio CD) for playback
A
to open/close the disc tray
Press to access or remove the Search display, which
allows you to go directly to a specific
(STOP)
(PAUSE/STEP
(PLAY)
G
(OPEN/CLOSE)
ss B
ppo
)
2-5
MAINTENANCE AND INSPECTION3
,
3-1 TROUBLESHOOTING
Troubleshooting is how to service for the specifying malfunction or poor parts.
Detect malfunction or poor parts and service as the following charts.
FLOW CHART NO.1
The power cannot be turned on.
Is the fuse normal?
Yes
Is normal state restored when once unplugged
power cord is plugged again after several seconds?
Yes
Is the EV+3.3V line voltage normal?
Yes
Check each rectifying circuit of the secondary circuit
and
service it if defective.
FLOW CHART NO.2
The fuse blows out.
Check the presence that the primary component
is leaking or shorted and service it if defective.
After servicing, replace the fuse.
FLOW CHART NO.3
When the output voltage fluctuates.
Does the photo coupler circuit on the secondary
side operate normally?
Yes
Check IC1001, D1012, D1024 and their periphery,
and service it if defective.
No
No
No
No
See FLOW CHART No.2 <The fuse blows out.>
Check if there is any leak or short-circuiting on the
primary circuit component,
defective. (Q1001, Q1003, T1001, D1001, D1002,
D1004, D1005, D1011, C1003, C1005)
Check the presence that the rectifying diode or
circuit is shorted in each rectifying circuit of
secondary side, and service it if defective.
Check IC1001, IC1006, D1015, D1048 and their
periphery, and service it if defective.
and
service it if
FLOW CHART NO.4
When buzz sound can be heard in the vicinity of power circuit.
Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondary side
and service it if defective.
FLOW CHART NO.5
-FL is not outputted.
Is -24V voltage supplied to the anode of D1003?
Check if there is any leak or short-circuit
on the loaded circuit, and service it if defective.
(D1003, D1006, D1008, D1016, D1030, IC1002, Q1002, Q1004, Q1011, Q1050)
Yes
No
Check D1003 and periphery circuit, and service it
if defective.
3-1
.
FLOW CHART NO.6
P-ON+12V is not outputted.
Is 12V voltage supplied to the emitter of Q1002?
Yes
Is the voltage of base on Q1002 lower than the
voltage of emitter on Q1002 when turning the power on?
Yes
Replace Q1002.
FLOW CHART NO.7
EV+9V is not outputted.
Is 9V voltage supplied to the collector of Q1050?
Yes
Is the "H" pulse inputted into the base of Q1050?
Yes
Replace Q1050.
FLOW CHART NO.8
P-ON+5V is not outputted. (EV+9V is outputted normally.)
Is the "H" pulse inputted into the base of Q1004?
Yes
Replace Q1004.
No
No
No
No
No
Check D1030, D1048, L1009, C1035, C1048 and
the periphery circuit, and service it if defective.
Check Q1016 and PWRCON line and service it if
defective.
Check D1030, D1048, L1009, C1035, C1048, R1097
and the periphery circuit, and service it if defective.
Check D1072, C1070, R1098 and service it if
defective.
Check R1068 and D1046, and service it if defective
FLOW CHART NO.9
P-ON+3.3V (EV+3.3V) is not outputted. (P-ON+12V is outputted normally.)
Is 3.3V voltage supplied to the collector of Q1011?
Yes
Replace Q1011 and R1067.
FLOW CHART NO.10
EV+5V is not outputted.
Is EV+9V outputted normally?
Yes
Check D1047 and the periphery circuit, and
service it if defective.
FLOW CHART NO.11
EV+1.5V is not outputted.
Is approximately 2.5V voltage supplied to Pin(1)
of IC1002?
Yes
Replace IC1002.
No
No
No
Check D1008, D1015, C1007, C1038 and the
periphery circuit, and service it if defective.
Refer to "FLOW CHART NO.6"
<EV+9V is not outputted.>
Check D1006,C1014,C1050, and their periphery,
and service it if detective.
3-2
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