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SERVICE MANUAL
Sec. 1: Main Section Sec. 2: Deck Mechanism Section Sec. 3: Exploded views
I Specifications I Standard Maintenance and Parts List Section
I Preparation for Servicing I Alignment for Mechanism I Exploded views
I Adjustment Procedures I Disassembly/Assembly of Mechanism I Parts List
I Schematic Diagrams I Alignment Procedures of Mechanism
I CBA's




DVD PLAYER &
VIDEO CASSETTE RECORDER


DCVR-4800




PAL SECAM
MAIN SECTION

DVD PLAYER &
VIDEO CASSETTE RECORDER

DCVR-4800
Sec. 1: Main Section
I Specifications
I Preparation for Servicing
I Adjustment Procedures
I Schematic Diagrams
I CBA's




TABLE OF CONTENTS
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1-1
Laser Beam Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2-1
Important Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3-1
Standard Notes for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4-1
Preparation for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5-1
Cabinet Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6-1
Electrical Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-1
FIRMWARE Renewal Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8-1
Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9-1
Schematic Diagrams / CBA's and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10-1
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11-1
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12-1
IC Pin Function Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13-1
Lead Identifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14-1




Manufatured under license from Dolby Laboratories. "Dolby" and
the double-D symbol are trademarks of Dolby Laboratories.
SPECIFICATIONS
< VCR Section >
Description Unit Minimum Nominal Maximum Remark

1. Video

1-1. Video Output (PB) Vp-p 0.8 1.0 1.2 SP Mode

1-2. Video Output (R/P) Vp-p 0.8 1.0 1.2
SP Mode,
1-3. Video S/N Y (R/P) dB 40 45
W/O Burst

1-4. Video Color S/N AM (R/P) dB 37 41 SP Mode

1-5. Video Color S/N PM (R/P) dB 30 36 SP Mode

1-6. Resolution (PB) Line 230 245 SP Mode

2. Servo

2-1. Jitter Low µsec 0.07 0.12 SP Mode

2-2. Wow & Flutter % 0.3 0.5 SP Mode

3. Normal Audio

3-1. Output (PB) dBV -9 -4 -3 SP Mode
3-2. Output (R/P) dBV -9 -4 -1.5 SP Mode

3-3. S/N (R/P) dB 36 41 SP Mode

3-4. Distortion (R/P) % 1.0 4.0 SP Mode

3-5. Freq. resp (R/P) at 200Hz dB -6 -2 SP Mode

(-20dB ref. 1kHz) at 8kHz dB -8 -2 SP Mode

4. Tuner

4-1. Video output Vp-p 0.8 1.0 1.2 E-E Mode
4-2. Video S/N dB 39 44 E-E Mode

4-3. Audio output dB -10 -6 -2 E-E Mode

4-4. Audio S/N dB 40 46 E-E Mode

5. Hi-Fi Audio

5-1. Output dBV -12 -9 -4 SP Mode

5-2. Dynamic Range dB 70 85 SP Mode
5-3. Freq. resp (6dB B.W) Hz 20 ~ 20K SP Mode

Note: Nominal specs represent the design specs. All units should be able to approximate these ­ some will exceed
and some may drop slightly below these specs. Limit specs represent the absolute worst condition that still might
be considered acceptable; In no case should a unit fail to meet limit specs.




1-1-1 H9510SP
< DVD Section >
ITEM CONDITIONS UNIT NOMINAL LIMIT

1. Video Output 75 ohm load Vpp 1.0 ± 0.1
2. Optical Digital Out dBm -18

3. Audio (PCM)

3-1. Output Level 1kHz 0dB Vrms 2.0
3-2. S/N dB 85

3-3. Freq. Response

DVD fs=48kHz 20~22kHz dB ± 0.5
CD fs=44.1kHz 20~20 kHz dB ± 0.5

3-4. THD+N

DVD 1 kHz 0dB % 0.02
CD 1 kHz 0dB % 0.03

NOTES:
1. All Items are measured without pre-emphasis unless otherwise specified.
2. Power supply : AC220 - 240 V 50 Hz
3. Load imp. : 100 K ohm
4. Room ambient : 5 °C ~ 40 °C




1-1-2 H9510SP
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 strike against your
skin.




The laser beam is emitted from the location shown in the figure. When checking the laser diode, be sure to keep
your eyes at least 30cm away from the pickup lens when the diode is turned on. Do not look directly at the laser
beam.


Caution: Use of controls and adjustments, or doing procedures other than those specified herein, may result in
hazardous radiation exposure.




Drive Mecha Assembly



Laser Beam Radiation




Laser Pickup

Turntable




1-2-1 DVD_LASER
IMPORTANT SAFETY PRECAUTIONS
Product Safety Notice I. Also check areas surrounding repaired locations.
J. Be careful that foreign objects (screws, solder
Some electrical and mechanical parts have special droplets, etc.) do not remain inside the set.
safety-related characteristics which are often not evi-
dent from visual inspection, nor can the protection they K. Crimp type wire connector
give necessarily be obtained by replacing them with The power transformer uses crimp type connectors
components rated for higher voltage, wattage, etc. which connect the power cord and the primary side
Parts that have special safety characteristics are iden- of the transformer. When replacing the transformer,
tified by a ! on schematics and in parts lists. Use of a follow these steps carefully and precisely to prevent
substitute replacement that does not have the same shock hazards.
safety characteristics as the recommended replace- Replacement procedure
ment part might create shock, fire, and/or other haz- 1)Remove the old connector by cutting the wires at a
ards. The Product's Safety is under review point close to the connector.
continuously and new instructions are issued when- Important: Do not re-use a connector. (Discard it.)
ever appropriate. Prior to shipment from the factory, 2)Strip about 15 mm of the insulation from the ends
our products are carefully inspected to confirm with of the wires. If the wires are stranded, twist the
the recognized product safety and electrical codes of strands to avoid frayed conductors.
the countries in which they are to be sold. However, in
3)Align the lengths of the wires to be connected.
order to maintain such compliance, it is equally impor-
Insert the wires fully into the connector.
tant to implement the following precautions when a set
is being serviced. 4)Use a crimping tool to crimp the metal sleeve at its
center. Be sure to crimp fully to the complete clo-
Precautions during Servicing sure of the tool.
L. When connecting or disconnecting the internal
A. Parts identified by the ! symbol are critical for connectors, first, disconnect the AC plug from the
safety. Replace only with part number specified. AC outlet.
B. In addition to safety, other parts and assemblies
are specified for conformance with regulations
applying to spurious radiation. These must also be
replaced only with specified replacements.
Examples: RF converters, RF cables, noise block-
ing 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 solder-
ing.
F. Observe that the wires do not contact heat produc-
ing parts (heatsinks, oxide metal film resistors, fus-
ible resistors, etc.).
G. Check that replaced wires do not contact sharp
edges or pointed parts.
H. When a power cord has been replaced, check that
5 - 6 kg of force in any direction will not loosen it.


1-3-1 DVD_SFNP2
Safety Check after Servicing
Examine the area surrounding the repaired location for
damage or deterioration. Observe that screws, parts,
and wires have been returned to their original posi- Chassis or Secondary Conductor
tions. Afterwards, do the following tests and confirm
the specified values to verify compliance with safety Primary Circuit Terminals
standards.
d' d
1. Clearance Distance
When replacing primary circuit components, confirm
specified clearance distance (d) and (d') between sol-
dered terminals, and between terminals and surround-
ing metallic parts. (See Fig. 1)

Table 1 : Ratings for selected area
AC Line Voltage Clearance Distance (d) (d')

3mm(d) Fig. 1
220 - 240 V
6 mm(d')
Note: This table is unofficial and for reference only.
Be sure to confirm the precise values.
Exposed Accessible Part
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 termi-
nals, antenna terminals, video and audio input and AC Voltmeter
output terminals, microphone jacks, earphone jacks, Z (High Impedance)
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 One side of
B
AC voltmeter to measure across the terminals of load Power Cord Plug Prongs
Z. See Fig. 2 and the following table.
Fig. 2




Table 2: Leakage current ratings for selected areas
One side of power cord plug
AC Line Voltage Load Z Leakage Current (i)
prongs (B) to:
2k RES.
i0.7mA AC Peak RF or
Connected in
i2mA DC Antenna terminals
parallel
220 - 240 V
50k RES.
i0.7mA AC Peak
Connected in A/V Input, Output
i2mA DC
parallel
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.




1-3-2 DVD_SFNP2
STANDARD NOTES FOR SERVICING
Circuit Board Indications How to Remove / Install Flat Pack-IC
a. The output pin of the 3 pin Regulator ICs is indi- 1. Removal
cated as shown.
With Hot-Air Flat Pack-IC Desoldering Machine:.
(1) Prepare the hot-air flat pack-IC desoldering
Top View Bottom View
machine, then apply hot air to the Flat Pack-IC
Input (about 5 to 6 seconds). (Fig. S-1-1)
Out In



b. For other ICs, pin 1 and every fifth pin are indicated
as shown.

5

Pin 1

Fig. S-1-1
10
(2) Remove the flat pack-IC with tweezers while apply-
c. The 1st pin of every male connector is indicated as ing the hot air.
shown. (3) Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
Pin 1 up. Then remove (glue will be melted). (Fig. S-1-6)
(4) Release the flat pack-IC from the CBA using twee-
zers. (Fig. S-1-6)
Caution:
Instructions for Connectors 1. Do not supply hot air to the chip parts around the
1. When you connect or disconnect the FFC (Flexible flat pack-IC for over 6 seconds because damage to
Foil Connector) cable, be sure to first disconnect the chip parts may occur. Put masking tape around
the AC cord. the flat pack-IC to protect other parts from damage.
(Fig. S-1-2)
2. FFC (Flexible Foil Connector) cable should be
inserted parallel into the connector, not at an angle. 2. The flat pack-IC on the CBA is 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.

FFC Cable
Hot-air
Flat Pack-IC
Desoldering
Machine
Connector CBA

CBA


* Be careful to avoid a short circuit.
Masking Flat Pack-IC
Tape
Tweezers
Fig. S-1-2



1-4-1 DVD_NOTE
With Soldering Iron: (4) Bottom of the flat pack-IC is fixed with glue to the
(1) Using desoldering braid, remove the solder from all CBA; when removing entire flat pack-IC, first apply
pins of the flat pack-IC. When you use solder flux soldering iron to center of the flat pack-IC and heat
which is applied to all pins of the flat pack-IC, you up. Then remove (glue will be melted). (Fig. S-1-6)
can remove it easily. (Fig. S-1-3) (5) Release the flat pack-IC from the CBA using twee-
zers. (Fig. S-1-6)
Flat Pack-IC Desoldering Braid Note:
When using a soldering iron, care must be taken
to ensure that the flat pack-IC is not being held by
glue. When the flat pack-IC is removed from the
CBA, handle it gently because it may be damaged
if force is applied.

Soldering Iron Hot Air Blower

Fig. S-1-3

(2) Lift each lead of the flat pack-IC upward one by or
one, using a sharp pin or wire to which solder will
not adhere (iron wire). When heating the pins, use
a fine tip soldering iron or a hot air desoldering Iron Wire
machine. (Fig. S-1-4)

Soldering Iron

To Solid
Mounting Point

Fig. S-1-5
Sharp
Pin


Fine Tip Fine Tip
Soldering Iron CBA Soldering Iron
Fig. S-1-4

(3) Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. S-1-6)
Flat Pack-IC
(4) Release the flat pack-IC from the CBA using twee-
zers. (Fig. S-1-6) Tweezers

With Iron Wire:
(1) Using desoldering braid, remove the solder from all Fig. S-1-6
pins of the flat pack-IC. When you use solder flux
which is applied to all pins of the flat pack-IC, you
can remove it easily. (Fig. S-1-3)
(2) Affix the wire to a workbench or solid mounting
point, as shown in Fig. S-1-5.
(3) While heating the pins using a fine tip soldering
iron or hot air blower, pull up the wire as the solder
melts so as to lift the IC leads from the CBA contact
pads as shown in Fig. S-1-5




1-4-2 DVD_NOTE
2. Installation Instructions for Handling
(1) Using desoldering braid, remove the solder from Semi-conductors
the foil of each pin of the flat pack-IC on the CBA
Electrostatic breakdown of the semi-conductors may
so you can install a replacement flat pack-IC more
occur due to a potential difference caused by electro-
easily.
static charge during unpacking or repair work.
(2) The "I" mark on the flat pack-IC indicates pin 1.
(See Fig. S-1-7.) Be sure this mark matches the 1 1. Ground for Human Body
on the PCB when positioning for installation. Then Be sure to wear a grounding band (1M) that is prop-
presolder the four corners of the flat pack-IC. (See erly grounded to remove any static electricity that may
Fig. S-1-8.) be charged on the body.
(3) Solder all pins of the flat pack-IC. Be sure that none
of the pins have solder bridges.
2. Ground for Workbench
(1) Be sure to place a conductive sheet or copper plate
Example : with proper grounding (1M) on the workbench or
other surface, where the semi-conductors are to be
placed. Because the static electricity charge on
clothing will not escape through the body ground-
ing band, be careful to avoid contacting semi-con-
ductors with your clothing.
< Incorrect >
Pin 1 of the Flat Pack-IC
is indicated by a " " mark.
Fig. S-1-7



Presolder



CBA




Flat Pack-IC

CBA

Fig. S-1-8 < Correct >
Grounding Band




1M



CBA


1M
Conductive Sheet or
Copper Plate




1-4-3 DVD_NOTE
PREPARATION FOR SERVICING
How to Enter the Service Mode
AAbout Optical Sensors
Caution:
An optical sensor system is used for the Tape Start
and End Sensors on this equipment. Carefully read
and follow the instructions below. Otherwise the unit
may operate erratically.
What to do for preparation
Insert a tape into the Deck Mechanism Assembly and
press the PLAY button. The tape will be loaded into
the Deck Mechanism Assembly. Make sure the power
is on, connect TP501 (SENSOR INHIBITION) to
GND. This will stop the function of Tape Start Sensor,
Tape End Sensor and Reel Sensors. (If these TPs are
connected before plugging in the unit, the function of
the sensors will stay valid.) See Fig. 1.

Note: Because the Tape End Sensors are inactive, do
not run a tape all the way to the start or the end of the
tape to avoid tape damage.




Q503 Q504

TP501
S-INH




Fig. 1




1-5-1 H9500PFS
CABINET DISASSEMBLY INSTRUCTIONS
1. Disassembly Flowchart REMOVAL
ID/
This flowchart indicates the disassembly steps to gain LOC. PART REMOVE/*UNHOOK/
Fig.
access to item(s) to be serviced. When reassembling, No. UNLOCK/RELEASE/ Note
No.
follow the steps in reverse order. Bend, route, and UNPLUG/DESOLDER
dress the cables as they were originally. PCB
[8] D6 3(S-9) -
Bracket
[1] Top Cover [9] Rear Panel D6 ---------- -
VCR
5(S-10), 2(S-11),
[2] Front [10] Chassis D7 -
2(S-11A)
Assembly Unit
Deck Desolder, (S-12),
[11] D8 4,5
[17] Side Assembly (S-12A)
[3] Top Bracket [9] Rear Panel
Bracket
[12] Main CBA D8 ---------- -
DVD
[5] DVD Main [4] DVD Mecha
[8] PCB Bracket OPEN/
CBA Assembly [13] D8 Desolder -
CLOSE
CBA
[13] DVD OPEN/ [6] Rear Unit [7] Power
CLOSE CBA Supply CBA Function
[14] D8 Desolder -
CBA
[12] Main CBA [10] VCR [11] Deck [15] Jack CBA D8 Desolder -
Chassis Unit Assembly
Deck
[16] D9 7(S-13) -
Pedestal
[14] Function [16] Deck
[15] Jack CBA Side
CBA Pedestal [17] D9 (S-14) -
Bracket
2. Disassembly Method
(1) (2) (3) (4) (5)
REMOVAL
ID/
REMOVE/*UNHOOK/ Note:
LOC. PART Fig.
No. UNLOCK/RELEASE/ Note (1): Identification (location) No. of parts in the figures
No.
UNPLUG/DESOLDER (2): Name of the part
[1] Top Cover D1 7(S-1) - (3): Figure Number for reference
1 (4): Identification of parts to be removed, unhooked,
Front
[2] D2 (S-2), *7(L-1) 1-1 unlocked, released, unplugged, unclamped, or
Assembly 1-2 desoldered.
Top P=Spring, L=Locking Tab, S=Screw,
[3] D2 2(S-3), 2(S-3A) - CN=Connector
Bracket
*=Unhook, Unlock, Release, Unplug, or Desolder
DVD e.g. 2(S-2) = two Screws (S-2),
3(S-4), *CN302,
[4] Mecha D3 - 2(L-2) = two Locking Tabs (L-2)
*CN401, *CN601
Assembly
(5): Refer to "Reference Notes."
2
2-1
DVD Main 2(S-5), *CN201,
[5] D4 2-2
CBA *CN301 2-3
3
5(S-6), 4(S-7),
[6] Rear Unit D5 -
CN1005
Power
[7] Supply D6 2(S-8), 2(S-8A) -
CBA


1-6-1 H9500DC
Reference Notes
(S-3)
CAUTION 1: Locking Tabs (L-1) are fragile. Be careful
not to break them. (S-3A)
[3] Top Bracket
1-1. Remove Screw (S-3).
1-2. Release seven Locking Tabs (L-1) (to do this,
first release five Locking Tabs (A) at the side and (S-3A)
top, and then release two Locking Tabs (B) at the
bottom.) (L-1)
(A)
CAUTION 2: Electrostatic breakdown of the laser (L-1)
diode in the optical system block may occur as a
potential difference caused by electrostatic charge
accumulated on cloth, human body etc., during (A)
unpacking or repair work.
(L-1)
To avoid damage of pickup follow next procedures.
2-1. Slide the pickup unit as shown in Fig. D4. (S-2)
2-2. Short the three short lands of FPC cable with sol- (B) (A)
der before removing the FFC cable (CN301) from [2] Front Assembly Fig. D2
it. If you disconnect the FFC cable (CN301), the
laser diode of pickup will be destroyed. (Fig. D4)
2-3. Disconnect Connector (CN201). Remove two
Screws (S-5) and lift the DVD Main CBA. (Fig. CN601 (S-4)
D4) CN302 (S-4)
CAUTION 3: When reassembling, confirm the FFC
cable (CN301) is connected completely. Then remove (S-4)
the solder from the three short lands of FPC cable.
(Fig. D4) [4] DVD Mecha Assembly
CAUTION 4: When reassembling, solder wire jumpers
as shown in Fig. D8.
CAUTION 5: Before installing the Deck Assembly, be CN401
sure to place the pin of LD-SW on Main CBA as shown
in Fig. D8. Then, install the Deck Assembly while
aligning the hole of Cam Gear with the pin of LD-SW,
the shaft of Cam Gear with the hole of LD-SW as
shown in Fig. D8.




[1] Top Cover
(S-1) Fig. D3
(S-1)




(S-1)
Fig. D1



1-6-2 H9500DC
(S-5) CN201
(S-5) (S-9)
[5] DVD Main
CBA
(S-8A)
CN301 [9] Rear Panel
(S-8)



[8] PCB Bracket

[7] Power Supply CBA
(S-8) (S-8A)
DVD Mecha
Fig. D6
A

B Short the three short
(S-11) (S-10)
lands by soldering
(S-10)
Slide
(S-11)
(S-10)
(S-11A)


Pickup Unit
[10] VCR Chassis Unit
View for A View for B
(S-11A)
Fig. D4




[6] Rear Unit (S-7)
(S-6)

(S-7)

Fig. D7
CN003

(S-7)




Fig. D5




1-6-3 H9500DC
FE Head Cylinder Assembly
Pin
[11] Deck ACE Head
Assembly Assembly


SW507
LD-SW




Desolder [15] Jack CBA [12] Main CBA
[11] Deck Assembly
Lead with
blue stripe Cam Gear
Hole
Shaft


Hole
LD-SW Pin
[12] Main CBA

[13] DVD OPEN/ Lead with blue stripe
CLOSE CBA
Desolder from bottom
(S-12A)
(S-12)
[12] Main CBA Desolder
[14] Function CBA
Lead with
blue stripe




From
Lead with Cylinder
From blue stripe Assembly From
ACE Head FE Head
Assembly


Lead with
white stripe
Printing side
Desolder

From
Capstan
Motor Desolder
Assembly




BOTTOM VIEW
Lead connections of Deck Assembly and Main CBA

Fig. D8

1-6-4 H9500DC
[16] Deck Pedestal (S-13)




(S-13)
(S-14)




[17] Side
Bracket




Fig. D9




To Remove the Disc Manually
1. Remove the Top Cover.
2. Rotate this roulette in the direction of the arrow as
shown below.




Top Cover
1
DVD Mecha
Tray

Deck Assembly
Rotate this roulette in
the direction of the arrow

2
3 2




1-6-5 H9500DC
ELECTRICAL ADJUSTMENT INSTRUCTIONS
General Note: "CBA" is an abbreviation for
"Circuit Board Assembly."
NOTE:
1.Electrical adjustments are required after replacing Figure 1
circuit components and certain mechanical parts.
It is important to do these adjustments only after
all repairs and replacements have been com- EXT. Syncronize Trigger Point
pleted. Also, do not attempt these adjustments
unless the proper equipment is available.
2.To perform these alignment / confirmation proce- CH1
1.0H 0.5H
dures, make sure that the tracking control is set in V-Sync
CH2 6.5H±1H (412.7µs±60µs)
the center position: Press either "CHANNEL L5? " or
"CHANNEL K" button on the front panel first, then Switching Pulse
the "PLAY" button on the front panel.

Test Equipment Required Reference Notes:
Playback the Alignment tape and adjust VR501 so that
1.Oscilloscope: Dual-trace with 10:1 probe,
the V-sync front edge of the CH1 video output wave-
V-Range: 0.001~50V/Div.,
form is at the 6.5H(412.7µs) delayed position from the
F-Range: DC~AC-20MHz
rising edge of the CH2 head switching pulse wave-
2.Alignment Tape (FL6A) form.
Head Switching Position Adjustment
Purpose:
To determine the Head Switching point during
playback.
Symptom of Misadjustment:
May cause Head Switching noise or vertical jitter
in the picture.

Test point Adj.Point Mode Input
TP751(V-OUT) VR501
PLAY
TP504(RF-SW) (Switching Point) -----
(SP)
GND (MAIN CBA)
Measurement
Tape Spec.
Equipment

FL6A Oscilloscope 6.5H±1H
(412.7µs±60µs)

Connections of Measurement Equipment


Oscilloscope
TP751
Main CBA GND
TP504
CH1 CH2
Trig. (+)




1-7-1 H9500EA
FIRMWARE RENEWAL MODE
1. Turn the power on and remove the disc on the tray. 5. After programming is finished, the tray opens auto-
2. To put the DVD player into version up mode, press matically. Fig. e appears on the screen and the
[9], [8], [7], [6], and [SEARCH MODE] buttons on checksum in (*3) of Fig. e appears on the VFD.
the remote control unit in that order. The tray will (Fig. f)
open automatically.
Fig. a appears on the screen and Fig. b appears on F/W Version Up Mode
the VFD.
VERSION : ********
Completed
F/W Version Up Mode SUM : 7abc (*3)

Please insert a DISC
for F/W Version Up.




Fig. e Completed Program Mode Screen
EXIT: POWER


Fig. a Version Up Mode Screen
Fig. f VFD upon Finishing the Programming Mode (Example)

At this time, no buttons are available.
Fig. b VFD in Version Up Mode
6. Unplug the AC cord from the AC outlet. Then plug it
again.
The DVD player can also enter the version up 7. Turn the power on by pressing the power button
mode with the tray open. In this case, Fig. a will be and the tray will close.
shown on the screen while the tray is open. 8. Press [1], [2], [3], [4], and [DISPLAY] buttons on the
3. Load the disc for version up. remote control unit in that order.
4. The DVD player enters the F/W version up mode Fig. g appears on the screen.
automatically. Fig. c appears on the screen and
Fig. d appears on the VFD. model: ****** Ver: **** Region: **
1: VFD TEST
2: TT REPEAT PLAY
F/W Version Up Mode 3: EEPROM CLEAR
4: MEASUREMENT SERVO
VERSION : ******** 5: DISC READ CHECK
Reading...(*2) 6: MECHA CHECK
7: DISC INFO
8: ERROR RATE

RETURN: ----- EXIT: POWER

EXIT: POWER Fig. g

9. Press [3] button on the remote control unit.
Fig. c Programming Mode Screen
Fig. h appears on the screen.

model: ****** Ver: **** Region: **
TEST 3: EEPROM CLEAR
Fig. d VFD in Programming Mode (Example) EEPROM CLEAR: OK

The appearance shown in (*2) of Fig. c is
described as follows:

No. Appearance State
RETURN: ----- EXIT: POWER
1 Reading... Sending files into the memory
Fig. h
2 Erasing... Erasing previous version data
10.To finish this mode, press [POWER] button.
3 Programming... Writing new version data



1-8-1 H9500TEST
BLOCK DIAGRAMS
Servo/System Control Block Diagram

(DECK ASSEMBLY)
IC501 TP501 S-INH
AL+5V MAIN CBA (SERVO/SYSTEM CONTROL) FUNCTION CBA
KEY
SW507 KEY- 2 8 SWITCH CL505 CL591
AC HEAD ASSEMBLY LD-SW KEY- 1 7 2 KEY-1 2 KEY SWITCH
D555 Q507
S-LED POWER-LED 23 4 POWER-LED 4
AL+5V
CL287 CL504 AL+5V 9 LD-SW
CONTROL 5 CTL(+) 5 95 CTL(+)
HEAD 6 CTL(-) 6 94 CTL(-)
Q502 D501 TIMER
10 ST-S TIMER-LED 25 D591
4 END-S DVD POWER
Q508 D502
TP502 80 T-REEL DVD-LED 29
END-S 79 S-REEL VCR
Q506 PS502 Q509 D503
VCR-LED 30
T-REEL S-REEL REC
Q511 D504
REC-LED 26
Q515
TIMER+5V RESET 34 RESET AL+5V
Q504
ST-S DRV-DATA
DRV-DATA 68
DRV-STB TO DVD SYSTEM
DRV-STB 69
DRV-CLK CONTROL BLOCK
SENSOR CBA DRV-CLK 70
DVD-POWER
TO DVD SYSTEM REMOTE-VIDEO DVD-POWER 21
CONTROL BLOCK 14 REMOTE-VIDEO

TP503 IC502 (MEMORY)
Q503 CTL 5 SDA
Q510
END-S 6 SCL
97 CTL

84 FF/REW-L
SENSOR CBA IIC-BUS SDA
AL+5V
IIC-BUS SCL TO
A-MUTE-H AUDIO BLOCK
VR501
2 PG-DELAY A-MUTE-H 83
SW-POINT
IIC-BUS SDA
IIC-BUS SCL
AL+5V 31 REC-SAF-SW Hi-Fi-H-SW TO
Hi-Fi-H-SW 19 Hi-Fi AUDIO
SW506 A-MODE
A-MODE 32 BLOCK
REC-SAFETY OUTPUT-SELECT
CYLINDER ASSEMBLY CAPSTAN MOTOR
LINE-MUTE
CL502 LINE-MUTE 82
PG
1 AL+20.5V/+12V AL+20.5V/+12V IIC-BUS SDA
SENSOR CAPSTAN
MOTOR
M 2 P-ON+5V P-ON+5V
IIC-BUS SDA
IIC-BUS SCL
72