Philips DVD-757-VR Service manual

DVD-VCR Player DVD757VR

DVD757VR /00
DVD757VR /02
DVD757VR /05

Contents

Chapter

Adjustment Procedure

Sec. 1:

Schematic Diagrams and CBA's
Exploded Views
Mechanical and Electrical Parts Lists

Sec. 2:

Standard Maintenance
Mechanism Alignment Procedures
Disassembly / Assembly of Mechanism
Deck Exploded Views

Sec. 3:

Spare Parts List
Revision List

©

Copyright 2003 Philips Consumer Electronics B.V. Eindhoven, The Netherlands.
All rights reserved. No part of this publication may be reproduced, stored in a
retrieval system or transmitted, in any form or by any means, electronic,
mechanical, photocopying, or otherwise without the prior permission of Philips.

Survey of versions:

/00 PAL I
/05 PAL B/G
/02 PAL B/G,L,L' & SECAM B/G,L,L'

Published by MW 0366 Service PaCE Printed in the Netherlands Subject to modification EN 3122 785 13771

MAIN SECTION

DIGITAL VIDEO DISC PLAYER &

VIDEO CASSETTE RECORDER

Sec. 1: Main Section

I Adjustment Procedures
I Schematic Diagrams and CBA’s
I Exploded Views
I Mechanical and Electrical Parts List

TABLE OF CONTENTS

LASER BEAM SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1-1

IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2-1

STANDARD NOTES FOR SERVICING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3-1

PREPARATION FOR SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4-1

OPERATING CONTROLS AND FUNCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5-1

SIGNAL NAME ABBREVIATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6-1

CABINET DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-1

ELECTRICAL ADJUSTMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8-1

FIRMWARE RENEWAL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9-1

BLOCK DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10-1

SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11-1

WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12-1

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13-1

SYSTEM CONTROL TIMING CHARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14-1

IC PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15-1

LEAD IDENTIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16-1

ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17-1

EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18-1

SET MECHANICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19-1

H9520CV

LASER BEAM SAFETY PRECAUTIONS

D

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.

rive Mecha Assembly

Laser Beam Radiation

Laser Pickup

Turntable

1-1-1 H9520_LASER

IMPORTANT SAFETY PRECAUTIONS

Product Safety Notice

Some electrical and mechanical parts have special
safety-related characteristics 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 safety characteristics are iden­tified 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, fire, 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 product safety and electrical codes of
the countries in which they are to be sold. However, in
order to maintain such compliance, it is equally impor­tant to implement the following precautions when a set
is being serviced.

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 spurious radiation. These must also be
replaced only with specified replacements.
Examples: RF converters, RF cables, 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. Observe that the wires do not contact heat produc-

ing parts (heatsinks, oxide metal film resistors, fus­ible 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.

I. Also check areas surrounding repaired locations.
J. Use care that foreign objects (screws, solder drop-

lets, etc.) do not remain inside the set.

K. Crimp type wire connector

The power transformer 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 the complete clo­sure of the tool.

L. When connecting or disconnecting the internal

connectors, first, disconnect the AC plug from the
AC outlet.

1-2-1 SFTY_06

Safety Check after Servicing

1

B

Z

2

Examine the area surrounding the repaired location for
damage or deterioration. 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 clearance distance (d) and (d’) between sol­dered terminals, and between terminals and surround­ing metallic parts. (See Fig. 1)

Table 1 : Ratings for selected area

AC Line Voltage Clearance Distance (d) (d’)

110 to 240 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 across the terminals of load
Z. See Fig. 2 and the following table.

Chassis or Secondary Conductor

Primary Circuit Terminals

dd'

Fig.

Exposed Accessible Part

AC Voltmeter
(High Impedance)

One side of
Power Cord Plug Prongs

Fig.

Table 2: Leakage current ratings for selected areas

AC Line Voltage Load Z Leakage Current (i)

2kΩ RES.

Connected in

110 to 240 V

Note: This table is unofficial and for reference only. Be sure to confirm the precise values.

parallel

50kΩ RES.

Connected in

parallel

i≤0.7mA AC Peak

i≤2mA DC

i≤0.7mA AC Peak

i≤2mA DC

1-2-2 SFTY_06

One side of power cord plug

prongs (B) to:

RF or

Antenna terminals

A/V Input, Output

STANDARD NOTES FOR SERVICING

O

P

P

Circuit Board Indications

a. The output pin of the 3 pin Regulator ICs is indi-

cated as shown.

Top View

ut

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

as shown.

Input

In

in 1

c. The 1st pin of every male connector is indicated as

shown.

in 1

Bottom View

5

10

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. S-1-1)

Fig. S-1-1

(2) Remove the flat pack-IC with tweezers while apply-

ing the hot air.

(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)

(4) Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

Instructions for Connectors

1. When you connect or disconnect the FFC (Flexible
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 masking tape around
the flat pack-IC to protect other parts from damage.
(Fig. S-1-2)

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.

Hot-air
Flat Pack-IC
Desoldering

CBA

Masking
Tape

Tweezers

Machine

Flat Pack-IC

Fig. S-1-2

1-3-1 NOTE_1-3

With Soldering Iron:

F

F
S

rp

or

n

(1) Using desoldering braid, remove the solder from all

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)

lat Pack-IC

Desoldering Braid

(4) 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)

(5) Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

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

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

Sha
Pin

ine Tip
oldering Iron

CBA

Fine Tip
Soldering Iro

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)

(4) Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

Tweezers

Flat Pack-IC

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

1-3-2 NOTE_1-3

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 replacement flat pack-IC more
easily.

(2) The “ I ” mark on the flat pack-IC indicates pin 1.

(See Fig. S-1-7.) Be sure this mark matches the 1
on the PCB when positioning for installation. Then
presolder the four corners of the flat pack-IC. (See
Fig. S-1-8.)

(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. S-1-7

Instructions for Handling
Semi-conductors

Electrostatic breakdown of the semi-conductors may
occur due to a potential difference caused by electro­static charge during unpacking or repair work.

1. Ground for Human Body

Be sure to wear a grounding band (1MΩ) that is prop­erly grounded to remove any static electricity that may
be charged on the body.

2. Ground for Workbench

Be sure to place a conductive sheet or copper plate
with proper grounding (1MΩ) 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 grounding band,
be careful to avoid contacting semi-conductors with
your clothing.

< Incorrect >

CBA

Presolder

Flat Pack-IC

Fig. S-1-8

CBA

< Correct >

Grounding Ban

1MΩ

CBA

1MΩ

Conductive Sheet or
Copper Plate

1-3-3 NOTE_1-3

PREPARATION FOR SERVICING

4

How to Enter the Service Mode

About 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

Q50

TP501

S-INH

Fig. 1

1-4-1 H9520PFS

OPERATING CONTROLS AND FUNCTIONS

[ DVD757VR/00 ]

1-5-1 H9520IB

1-5-2 H9520IB

[ DVD757VR/05 ]

1-5-3 H9520IB

1-5-4 H9520IB

k.

[ DVD757VR/02 ]

Front Panel

12 3 4

OPEN/CLOSE

STANDBY-ON

SOURCE

DIRECT DUBBING PLAY

STOP

DVD

VCR

12

16

14

13

17

15

11

REPEAT

A — B

24 252318 19 20 21 22

1. Disc T ray (DVD)

insert a disc here

2. A OPEN/CLOSE button (DVD)

to open/close the disc tray

3. Cassette Compartment (VCR)

insert a tape here

4. A STOP/EJECT button (VCR)

when playback is stopped,press to eject the tape

5. AUDIO and VIDEO in jacks

connect to AUDIO and VIDEO OUT of an audio source

6. B PLAY button (VCR)

to play a tape

7. RECORD button (VCR)

Press once to start recording,repeatedly to star t an One­Touch Recording

8. RECORD light (VCR)

light appears during recording,it flashes when a recording is
paused

9. RECORD TIMER light (VCR)

light appears when DVD/VCR is in standby mode for a timer
recording(also light appears during timer recording)

10. IR (Infrared) Remote Sensor (DVD,VCR)

receive signals from remote control

11. B PLAY button (DVD)

to start, pause or resume disc playback

12. C STOP button (DVD)

to stop playback

13. DIRECT DUBBING button (VCR)

to play DVD disc and record its’ content to video cassette
tape at the same time

14. DVD light (DVD)

light appears when DVD/VCR in DVD mode

RECORD

RECORD PLAY

RECORD

TIMER

IR

8

10

TITLE CHP. TRK.

79

VCD
PBC

15. VCR light (VCR)

light appears when DVD/VCR in VCR mode

16. SOURCE button (DVD,VCR)

to select between DVD and VCR mode

17. ySTANDBY-ON button (DVD,VCR)

to switch the player to ON or OFF

AUDIO

VIDEO

STANDBY-ON light (DVD,VCR)

light appears when DVD/VCR turns on.

56

18. TRK (DVD)

Stays on when repeat track function is on.

19. CHP. (DVD)

Stays on when repeat chapter function is on.

20. TITLE (DVD)

Stays on when repeat title function is on.

21. REPEAT (DVD)

2726

Stays on when the repeat function is on.

22. A-B REPEAT (DVD)

Stays on when the A-B repeat function is on.

23. B (DVD,VCR)

Stays on when the inserted disc or cassette is being played bac

24. k (DVD,VCR)

Lights up when the inserted disc comes to a pause.(DVD)
Lights up when the playback is in a still or in a slow
mode.(VCR)

25. Digital Display (DVD,VCR)

Displays how long a current title or track has been played
back.When a chapter or track has switched, the number of a
new title,chapter or track is displayed.(DVD)
Works as a clock, or a tape counter. Also displays a channel
number, and remaining time for OTR.(VCR)

26. CD

Lights up when a CD is inserted on the tray.

VCD

Lights up when a VCD is inserted on the tray.

PBC

Lights up when a VCD(with PBC function) is inserted on the
tray.

27. DVD

Lights up when a DVD is inserted on the tray.

Rear Panel

AV2 (DECODER)

AERIAL

RF OUT

VCR

DVD/VCR
AV1 (TV)

213456789

1. RF OUT jack

use supplied RF coaxial cable to connect to the ANTENNA
IN on your TV, cable box or Direct Broadcast System

2. AERIAL jack

connect to an antenna or cable

3. AV2 (DECODER) jack (VCR only)

connect SCART cable from another DVD/VCR, camcoder or
an audio/video source

S-VIDEO

OUT

DVD OUTPUT ONLY

ANALOG

AUDIO OUT

LRCOAXIAL OPTICAL

DIGITAL

AUDIO OUT

4. AV1 (TV) jack

connect SCART cable to a TV

5. S-Video Out jack (DVD only)

connect to a TV with S-Video inputs

6. AUDIO OUT (Left/Right) jacks (DVD only)

connect to AUDIO inputs of an amplifier,receiver or stereo
system

7. COAXIAL (Digital audio out) jack (DVD only)

connect to AUDIO inputs of a digital (coaxial) audio equip­ment

8. OPTICAL (Digital audio out) jack (DVD only)

connect to digital (optical) audio equipment

9. MAINS (A

connect to a standard

C Power Cord)

AC outlet

1-5-5 H9520IB

1-5-6 H9520IB

SIGNAL NAME ABBREVIATIONS

Signal Name Function

8POUT-1

8POUT-2

A-COM Audio Head Common
A-IN Audio Signal Input
A-MODE Hi-Fi Tape Detection Signal

A-MUTE-H

A-OUT Audio Signal Output

A-PB/REC

AE-H Audio Erase Head

AFC

AGC IF AGC Control Signal

AL+12V

AL+20.5V/
+12V

AL+5V

AL+9V

AL-30V

AMPC CTL AMP Connected Terminal
AMPVcc AMPVcc
AMPVREF in V-Ref for CTL AMP
AMPVREF

OUT

AVcc

C-CONT

C-F/R

C-FG

C-POW-SW Capstan Power Switching Signal
C-POWER-

SW

SCART 1 8Pin Output Control
Signal

Control SCART 1 8Pin Level by
using 8POUT-1 and 8POUT-2

Audio Mute Control Signal
(Mute = “H”)

Normal Audio Play Back/Record
Signal

Automatic Frequency Control
Signal

Always +12V with AC Plug
Connected

Always +15V/+12V with AC Plug
Connected

Always +5V with AC Plug
Connected

Always +9V with AC Plug
Connected

Always -30V with AC Plug
Connected

V-Ref for CTL AMP

A/D Converter Power Input/
Standard
Voltage Input

Capstan Motor
Control Signal

Capstan Motor FWD/REV Control
Signal (FWD=”L”/REV=”H”)

Capstan Motor Rotation Detection
Pulse

Capstan Power Switching Pulse

Signal Name Function

C-ROTA

C-SYNC Composite Synchronized Pulse
CLKSEL Clock Select (GND)

COLOR-IN

CTL +

CTL -

CTLAMPout To Monitor for CTL AMP Output
D-CONT Drum Motor Control Signal

D-PFG

D-REC-H Delayed Record Signal
D-V- SYNC Dummy V-sync Output
DAVN-L VPS/PDC Data Receive = “L”
DRV-CLK LED Clock Driver IC Control Clock
DRV-DATA LED Clock Driver IC Control Data

DRV-STB

DVD A DVD Audio Signal
DVD LED “DVD” LED Signal Output
DVD PLAY DVD Play at High

DVD-8PIN-IN

DVD-B-OUT

DVD-G-OUT

DVD-LED “DVD” LED Signal Output
DVD-P-

ON+12V
DVD-P-

ON+3.3V
DVD-P-

ON+5V
DVD-POWER DVD Power Control Signal
DVD-

POWERMONI
TOR

Color Phase Rotary Changeover
SIgnal

SECAM or MESECAM Chroma
Video Input Signal at Super
Impose

Playback/Record Control Signal
(+)

Playback/Record Control Signal (­)

Drum Motor Phase/Frequency
Generator

LED Clock Driver IC Chip Select
Signal

SCART 8Pin DVD Input Control
Signal

DVD Component Video Signal
(blue)

DVD Component Video Signal
(green)

+12V at DVD Power-On Signal

+3.3V at DVD Power-On Signal

+5V at DVD Power-On Signal

DVD Power Monitor Signal
(P-off="H", P-on="L")

1-6-1 H9520SNA

Signal Name Function

DVD-R-OUT

DVD-VIDEO DVD Video Control Signal
END-S Tape End Position Detect Signal

DVD Component Video Signal
(red)

Signal Name Function

N-A-REC Normal Audio Recording
OSC Oscillator Input

OSCin

Clock Input
for letter size

FE-H GND Ground for Full Erase Head

FF/REW-L

FIL-ON/OFF Filament ON/OFF Control Signal
FP-CLK
FP-DIN
FP-DOUT
FP-STB

FSC-IN

[4.43MHz]

FTV-IN

H-A-COMP Head Amp Comparator Signal

H-A-SW Video Head Amp Switching Pulse

Hi-Fi-A Hi-Fi Audio Head

Hi-Fi-COM Hi-Fi Audio Head Common

Hi-Fi-H-SW Hi-Fi Audio Head Switching Pulse

IIC-BUS- SCL IIC BUS Control Clock

IIC-BUS- SDA IIC BUS Control Data

INPUT

SELECT

JK1-8P-OUT

K1
K2

KEY-1 Key Scan Input Signal 1

KEY-2 Key Scan Input Signal 2

LD-SW

LD-SW

LINE MUTE Audio Mute Control Signal

LINE- MUTE

LM-FWD/REV Loading Motor Control Signal

MOD-A Modulator Audio Output Signal

MOD-V Modulator Video Output Signal

N-A-PB Normal Audio Playback

Frequency Characteristics
Switching Signal (FF/REW=”L”)

Clock Input
Serial Data Input
Serial Data Output
Serial Interface Strobe

4.43MHz Clock Input

Comparator Input of Video Signal
for Follow TV

Input Selector
Control Signal

SCART 8Pin Output Control
Signal

Key Data 1 Input
Key Data 2 Input

Deck Mode Position Detector
Signal

Deck Mode Position Detector
Signal

Audio Mute Control
Signal

OSCout Clock Output for letter size
OSD-V-IN OSD Video Signal Input
OSD-V-OUT OSD Video Signal Output
OSDVss OSDVss
OUTPUT-

SELECT

P-DOWN-L

P-OFF-H Power Off at High
P-ON+15V +15V at Power-On Signal
P-ON+44V +44V at Power-On Signal
P-ON+5V +5V at Power-On Signal
P-ON-H Power On Signal at High
PB-H-OUT Playback Signal Output at High

PG-Delay

POW-SAF

POWER-LED “POWER” LED Signal Output
REC-LED “REC” LED Signal Output

REC-SAF-SW

REMOTE­VIDEO

RESET

RF-SW Video Head Switching Pulse
S-REEL Supply Reel Rotation Signal
SC2-IN Input Signal from Pin 8 of SCART2
SECAM-C-IN SECAM Chroma Signal Input
SECAM-FM-

OUT
SECAM-H SECAM Mode at High

ST-S

T-REEL

TIMER LED “TIMER” LED Signal Output

Output Select

Power Voltage Down Detector
Signal

Video Head Switching Pulse
Signal Adjusted
Voltage

P-ON Power Detection Input
Signal

Recording Safety SW Detect (With
Record tab=”L”/ With out Record
tab=”H”)

Remote
Control Sensor

System Reset
Signal (Reset=”L”)

SECAM FM Signal Output

Tape Start Position Detector
Signal

Take Up Reel
Rotation Signal

1-6-2 H9520SNA

Signal Name Function

TIMER+5V +5V at Timer

TIMER- LED “TIMER” LED Signal Output

TRICK-H

TU-AUDIO Tuner Audio Input Signal

TU-VIDEO Tuner Video Input Signal

V-ENV

V-IN Video Signal Input

V-OUT Video Signal Output

Vcc Vcc

VCR LED “VCR” LED Signal Output
VDD

VIDEO Video Signal

Vss Vss(GND)

XCin Sub Clock

XCOUT Sub Clock

Xin Main Clock Input

Xout Main Clock Input

Special Playback = “H” in SECAM
Mode

Video Envelope Comparator
Signal

Power Supply

1-6-3 H9520SNA

CABINET DISASSEMBLY INSTRUCTIONS

t

1. Disassembly Flowchart

This flowchart indicates the disassembly steps to gain
access to item(s) to be serviced. When reassembling,
follow the steps in reverse order. Bend, route, and
dress the cables as they were originally.

[1] Top Cover

[2] Front

Assembly

[18] Side

Bracket

[5] DVD Main

CBA

[13] DVD OPEN/

CLOSE CBA

[12] Main CBA

[14] Function

CBA

[3] Top Bracket

[4] DVD Mecha

Assembly

[6] Rear Unit

[10] VCR

Chassis Unit

[15] Jack CBA

[16] Front CBA

[9] Rear Panel

[8] PCB Bracke

[7] Power

Supply CBA

[11] Deck
Assembly

[17] Deck

Pedestal

2. Disassembly Method

ID/

LOC.

No.

PART

Fig.

No.

[1] Top Cover D1 7(S-1) -

Front

[2]

[3]

Assembly

Top
Bracket

D2 (S-2), *7(L-1)

D2 2(S-3), 2(S-3A) -

DVD

[4]

Mecha

D3

Assembly

DVD Main

[5]

CBA

D4

[6] Rear Unit D5

Power

[7]

Supply

D6 2(S-8), 2(S-8A) -

CBA

REMOVAL

REMOVE/*UNHOOK/
UNLOCK/RELEASE/
UNPLUG/DESOLDER

3(S-4), *CN401,
*CN601

2(S-5), *CN201,
*CN301

5(S-6), 4(S-7),
CN003

Note

1
1-1
1-2

-

2
2-1
2-2

3

-

ID/

LOC.

No.

[8]

[9]

[10]

[11]

PART

PCB
Bracket

Rear Panel
VCR

Chassis
Unit

Deck
Assembly

REMOVE/*UNHOOK/

Fig.

UNLOCK/RELEASE/

No.

UNPLUG/DESOLDER

D6 3(S-9) -

D6 ---------- -

5(S-10), 2(S-11),

D7

3(S-11A)

Desolder, (S-12),

D8

(S-12A)

Note

-

4,5

[12] Main CBA D8 ---------- -

DVD

REMOVAL

OPEN/

[13]

CLOSE

D8 Desolder -

CBA
Function

[14]

CBA

D8 Desolder -

[15] Jack CBA D8 Desolder ­[16] Front CBA D8 *CN651 -

Deck

[17]

[18]

↓

(1)

Pedestal
Side

Bracket

↓

(2)

D9 7(S-13) -

D9 (S-14) -

↓

(3)

↓

(4)

↓

(5)

Note:

(1): Identification (location) No. of parts in the figures
(2): Name of the part
(3): Figure Number for reference
(4): Identification of parts to be removed, unhooked,

unlocked, released, unplugged, unclamped, or
desoldered.
P=Spring, L=Locking Tab, S=Screw,
CN=Connector
*=Unhook, Unlock, Release, Unplug, or Desolder
e.g. 2(S-2) = two Screws (S-2),
2(L-2) = two Locking Tabs (L-2)

(5): Refer to “Reference Notes.”

1-7-1 H9520DC

Reference Notes

(

(

ly

CAUTION 1: Locking Tabs (L-1) are fragile. Be careful
not to break them.

1-1. Remove Screw (S-2).
1-2. Release seven Locking Tabs (L-1) (to do this,

first release five Locking Tabs (A) at the side and
top, and then release two Locking Tabs (B) at the
bottom.)

CAUTION 2: Electrostatic breakdown of the laser
diode in the optical system block may occur as a
potential difference caused by electrostatic charge
accumulated on cloth, human body etc., during
unpacking or repair work.

To avoid damage of pickup follow next procedures.
2-1. Short the three short lands of FPC cable with sol-

der before removing the FFC cable (CN201) from
it. If you disconnect the FFC cable (CN201), the
laser diode of pickup will be destroyed. (Fig. D4)

2-2. Disconnect Connector (CN301). Remove two

Screws (S-5) and lift the DVD Main CBA. (Fig.
D4)

CAUTION 3: When reassembling, confirm the FFC
cable (CN201) is connected completely. Then remove
the solder from the three short lands of FPC cable.
(Fig. D4)

CAUTION 4: When reassembling, solder wire jumpers
as shown in Fig. D8.

CAUTION 5: Before installing the Deck Assembly, be
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.

(L-1)

(A)

L-1)

(S-2)

(B)

[2] Front Assembly

CN601

S-4)

CN401

(S-3)

(S-3A)

[3] Top Bracket

(S-3A)

(A)

(L-1)

(A)

Fig. D2

(S-4)

(S-4)

[4] DVD Mecha Assemb

[1] Top Cover

(S-1)

(S-1)

Fig. D3

(S-1)

Fig. D1

1-7-2 H9520DC

(S-5)

7)

l

(

0)

CN301

CN201

(S-5)

[5] DVD Main
CBA

DVD Mecha

(S-8)

(S-8)

(S-8A)

[8] PCB Bracket

[7] Power Supply CBA

(S-8A)

(S-9)

[9] Rear Pane

Fig. D6

A

Slide

[6] Rear Unit

B

Pickup Unit

View for A

Short the three short
lands by soldering

View for B

Fig. D4

(S-7)

(S-6)

(S-7)

CN003

(S-11)

(S-11A)

(S-10)

S-11A)

[10] VCR Chassis Unit

(S-11A)

(S-10)

(S-11)

(S-1

Fig. D7

(S-

Fig. D5

1-7-3 H9520DC

[11] Deck
Assembly

FE Head

Cylinder Assembly

ACE Head
Assembly

Pin

SW507
LD-SW

[12] Main CBA

[16] Front CBA

CN651

[13] DVD OPEN/
CLOSE CBA

Desolder

Lead with
blue stripe

(S-12)

From
ACE Head
Assembly

[14] Function CBA

[15] Jack CBA

(S-12A)

Lead with
blue stripe

[11] Deck Assembly

Shaft

Hole

LD-SW

Lead with blue stripe

Desolder from bottom

Desolder

Lead with
blue stripe

From
Cylinder
Assembly

[12] Main CBA

Cam Gear

Hole

Pin

[12] Main CBA

From
FE Head

From
Capstan
Motor
Assembly

Lead with
white stripe

Printing side

Desolder

Desolder

BOTTOM VIEW

Lead connections of Deck Assembly and Main CBA

Fig. D8

1-7-4 H9520DC

[17] Deck Pedestal

D

(S-13)

(S-14)

[18] Side
Bracket

(S-13)

To Remove the Disc Manually

Fig. D9

1. Remove the Top Cover.

2. Rotate this roulette in the direction of the arrow as
shown below.

Top Cover

1

VD Mecha

Tray

Deck Assembly

Rotate this roulette in
the direction of the arrow

3

2

2

1-7-5 H9520DC

ELECTRICAL ADJUSTMENT INSTRUCTIONS

e

2

)

C

C

c

General Note: "CBA" is an abbreviation for
"Circuit Board Assembly."

NOTE:

1.Electrical adjustments are required after replacing
circuit components and certain mechanical parts.
It is important to do these adjustments only after
all repairs and replacements have been com­pleted. Also, do not attempt these adjustments
unless the proper equipment is available.

2.To perform these alignment / confirmation proce­dures, make sure that the tracking control is set in
the center position: Press either "CHANNEL L5??" or
"CHANNEL K" button on the front panel first, then
the "PLAY" button on the front panel.

EXT. Syncronize Trigger Point

H1

H2

1.0H

6.5H±1H (412.7µs±60µs)

Switching Pulse

Figure 1

0.5H
V-Syn

Test Equipment Required

1.Oscilloscope: Dual-trace with 10:1 probe,
V-Range: 0.001~50V/Div.,
F-Range: DC~AC-20MHz

2.Alignment Tape (FL6A)

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)

TP504(RF-SW)

GND

Tape

FL6A Oscilloscope

VR501

(Switching Point)

(MAIN CBA)

Measurement

Equipment

PLAY

(SP)

6.5H±1H

(412.7µs±60µs)

-----

Spec.

Reference Notes:

Playback the Alignment tape and adjust VR501 so that
the V-sync front edge of the CH1 video output wave­form is at the 6.5H±1H (412.7µs±60µs) delayed posi­tion from the rising edge of the CH2 head switching
pulse waveform.

Connections of Measurement Equipment

Oscilloscop

TP751

Main CBA

GND

TP504

CH1 CH
Trig. (+

1-8-1 H9520EA

FIRMWARE RENEWAL MODE

F

e

F

e)

F

e)

1. Turn the power on and remove the disc on the tray.

2. To put the DVD player into version up mode, press
[9], [8], [7], [6], and [SEARCH MODE] buttons on
the remote control unit in that order. The tray will
open automatically.
Fig. a appears on the screen and Fig. b appears on
the VFD.

F/W Version Up Mode

Please insert a DISC

for F/W Version Up.

EXIT: POWER

Fig. a Version Up Mode Screen

ig. b VFD in Version Up Mod

The DVD player can also enter the version up
mode with the tray open. In this case, Fig. a will be
shown on the screen while the tray is open.

3. Load the disc for version up.

4. The DVD player enters the F/W version up mode
automatically. Fig. c appears on the screen and
Fig. d appears on the VFD.

F/W Version Up Mode

VERSION : ********
Reading...(*2)

5. After programming is finished, the tray opens auto­matically. Fig. e appears on the screen and the
checksum in (*3) of Fig. e appears on the VFD.
(Fig. f)

F/W Version Up Mode

VERSION : ********
Completed

SUM : 7abc (*3)

Fig. e Completed Program Mode Screen

ig. f VFD upon Finishing the Programming Mode (Exampl

At this time, no buttons are available.

6. Unplug the AC cord from the AC outlet. Then plug it
again.

7. Turn the power on by pressing the power button
and the tray will close.

8. Press [1], [2], [3], [4], and [DISPLAY] buttons on the
remote control unit in that order.
Fig. g appears on the screen.

model: ****** Ver: **** Region: **

1: VFD TEST
2: TT REPEAT PLAY

3: EEPROM CLEAR
4: MEASUREMENT SERVO
5: DISC READ CHECK
6: MECHA CHECK
7: DISC INFO
8: ERROR RATE

EXIT: POWERRETURN: -----

EXIT: POWER

Fig. c Programming Mode Screen

ig. d VFD in Programming Mode (Exampl

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

model: ****** Ver: **** Region: **

TEST 3: EEPROM CLEAR
EEPROM CLEAR: OK

Fig. g

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

AppearanceNo. State

Reading... Sending files into the memory

1

Erasing... Erasing previous version data

2

Programming...

3 Writing new version data

Fig. h

10.To exit this mode, press [POWER] button.

EXIT: POWERRETURN: -----

1-9-1 H9520TEST

Servo/System Control Block Diagram

" " = SMD

(DECK ASSEMBLY)

ACE HEAD ASSEMBLY

CL287

CONTROL
HEAD

Q504

ST-S

5 5CTL(+)
6 6CTL(-)

SENSOR CBA

Q503

END-S

SENSOR CBA

CYLINDER ASSEMBLY CAPSTAN MOTOR

PG
SENSOR

DRUM
MOTOR

M

CL504

FROM
VIDEO
BLOCK

CAPSTAN
MOTOR

MLOADING

MOTOR

SW507
LD-SW

M

AL+5V

TP502

END-S

TU-VIDEO

V-IN1

BLOCK DIAGRAMS

NOTE FOR WIRE CONNECTORS:

1. PREFIX SYMBOL "CN" MEANS CONNECTOR.
(CAN DISCONNECT AND RECONNECT.)

2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER
HOLES OF THE PCB.
(WIRE IS SOLDERED DIRECTLY.)

MAIN CBA

Q506

T-REEL

P-ON+5V

PS502

S-REEL

(COMPARATOR)

9
8

11
10

CL502

1

AL+20.5V/+12V

2 P-ON+5V
3 C-FG

C-F/R

4

C-CONT

5

GND

6

LM-FWD/REV

7

D-CONT

8

D-PFG

9

GND

10

AL+12V(2)

11

P-ON+15V

12

AL+5V

D555
S-LED

TIMER+5V

IC775

14

13

TO DVD SYSTEM
CONTROL BLOCK
<DVD SECTION>

TO
POWER
SUPPLY
BLOCK

Q775,
Q776

LOGIC

AL+5V

VR501
SW-POINT

Q515

RESET

P-ON+5V

4
5

REMOTE-VIDEO

DVD-PLAY
DRV-DATA
DRV-STB
DRV-CLK

DVD-POWER

AL+20.5V/+12V
P-ON+5V

AL+12V(2)
P-ON+15V

C-POW-SW
P-ON-H
P-DOWN-L
P-OFF-H

FIL-ON/OFF

TEST POINT INFORMATION

2 64

:INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB.
:USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE.
:USED TO INDICATE A TEST POINT WITH NO TEST PIN.
:USED TO INDICATE A TEST POINT WITH A TEST PIN.

IC501

(SERVO/SYSTEM CONTROL)

PG-DELAY

2

LD-SW

9

95

CTL(+)
CTL(-)

94
10

ST-S

4

END-S
T-REEL

80

S-REEL79

RESET

34

FTV-IN

REMOTE-VIDEO

14

DVD-PLAY

28

DRV-DATA

68

DRV-STB

69

DRV-CLK

70

DVD-POWER

21

C-FG

87

C-F/R

78

C-CONT

76

LM-FWD/REV

81

D-CONT77
D-PFG

90

C-POW

66

-SW
P-ON-H

67
86 P-DOWN-L
73 P-OFF-H

FIL-ON/OFF

24

REC-SAF-SW 31

INPUT-SELECT

OUTPUT-SELECT

KEY- 2
KEY- 1

POWER-LED

VCR-LED

DVD-LED

CTL 97

FF/REW-L

A-MUTE-H

Hi-Fi-H-SW

A-MODE

LINE-MUTE

IIC-BUS SDA

IIC-BUS SCL

DAVN-L

D-REC-H

RF-SW

C-ROTA

D-V-SYNC

H-A-SW

H-A-COMP

V-ENV

C-SYNC

SECAM-H

23

30

29

84

83

19
32

82

41

72
71
20
33
18
15

13
16
17

74
58

65TRICK-H
61

Comparison Chart of
Models & Marks

Model Mark

DVD757VR/00
DVD757VR/05
DVD757VR/02

TP501

S-INH

8
7

SW603

PLAY

Q507

Q509

Q508

TP503

CTL

Q510

AL+5V

SW506
REC-SAFETY

6

CL505

SW501

REC/OTR

CN503

CL591

2 2KEY-1

CN651

2 2KEY-1
4 4POWER-LED
5 5VCR-LED
6 6DVD-LED

IIC-BUS SDA

IIC-BUS SCL

IIC-BUS SDA

IIC-BUS SCL

OUTPUT SELECT

LINE-MUTE

INPUT-SELECT

IIC-BUS SDA

IIC-BUS SCL

OUTPUT-SELECT

FUNCTION CBA

FRONT CBA

KEY SWITCH

D651

D652

D653

IC502 (MEMORY)

SDA

5

SCL

6

A-MUTE-H

Hi-Fi-H-SW

A-MODE

DAVN-L

D-REC-H

RF-SW

C-ROTA

D-V-SYNC

H-A-SW

H-A-COMP

V-ENV

C-SYNC

TRICK-H

SECAM-H

SW591

POWER

POWER

VCR

DVD

TO
AUDIO BLOCK

TO
Hi-Fi AUDIO
BLOCK

TO
VIDEO BLOCK

C

A
B
C

AL+5V

1-10-1 1-10-2 H9520BLS

Video Block Diagram

" " = SMD

IC631 (VPS)

DAVN-L
IIC-BUS SDA
IIC-BUS SCL

TU701

VIDEO

TU-VIDEO

VPS-V

14

6
7

16

A,B

6

24

NOTE FOR WIRE CONNECTORS:

1. PREFIX SYMBOL "CN" MEANS CONNECTOR.
(CAN DISCONNECT AND RECONNECT.)

2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER
HOLES OF THE PCB.
(WIRE IS SOLDERED DIRECTLY.)

IC501 (OSD)

Q301

BUFFER

OSD
CHARACTER

52

MIX

50

TEST POINT INFORMATION

:INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB.
:USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE.
:USED TO INDICATE A TEST POINT WITH NO TEST PIN.
:USED TO INDICATE A TEST POINT WITH A TEST PIN.

IIC-BUS SDA

IIC-BUS SCL

REC-VIDEO SIGNAL

DAVN-L

TO SERVO/SYSTEM
CONTROL BLOCK

MAIN CBA

Comparison Chart of
Models & Marks

Model Mark

DVD757VR/00

MODE: SP/RECPB-VIDEO SIGNAL DVD VIDEO SIGNAL

DVD757VR/05
DVD757VR/02

A
B
C

TO
SERVO/SYSTEM
CONTROL BLOCK

JK752
V-IN-F

TO SERVO
/SYSTEM
CONTROL
BLOCK

TO DVD VIDEO
/AUDIO BLOCK
<DVD SECTION>

JK1402

V-IN2

19
20

V-OUT2

INPUT-SELECT

DVD-VIDEO

CL2018

BUFFER

Q103

JACK CBA

TU-VIDEO
V-IN1

(SW)

IC1404

5
3

SW CTL

9

V-OUT1

V-IN1

8

V-OUT2

V-IN2

10 10

4

JK101

19
20

CL2017

8

Q104

BUFFER

IC751 (SW)

4

SW CTL

IC301

(Y/C SIGNAL PROCESS)

48
50
52
54
56

PB/EE

61
63

DVD

5

VCR

3

11109

Q752

OUTPUT-SELECT

TUNER

FRT

PB/EE

MUTE

TUNER

IN1

MUTE

IN1

IN2

FRT

IN2

TP751

V-OUT

WF3

65

SERIAL

DECORDER

BYPASS

AGC

CHARA.
INS.

1/2

FBC

PR

AGC

58 59

TO SERVO/SYSTEM
CONTROL BLOCK

6968

46 43

7978

(DECK ASSEMBLY)

Y. DELAY

CYLINDER ASSEMBLY

VIDEO (R)-1
HEAD

VIDEO (L)-1
HEAD

VIDEO (L)-2
HEAD

VIDEO (R)-2
HEAD

C

Y/C
MIX

LUMINANCE
SIGNAL
PROCESS

CCD 1H DELAY

CHROMINANCE
SIGNAL
PROCESS

VXO

2928

X301

4.43MHz

25

R P

TP301

C-PB

WF2

R

Y

+

C

R P

21

P

REC FM
AGC

RF-SW/C-ROTA

PB-H OUT

44

SP

EP

D-V-SYNC

H-A-COMP

SP
HEAD
AMP

EP
HEAD
AMP

D-REC-H

H-A-SW

V-ENV

C-SYNC 67

96
95
94
93

90
89
88
87

80

70
62
71
83
84

CL251

V(R)-1

V-COM

V(L)-1

V(L)-2

V-COM

V(R)-2

WF1

TP504

RF-SW

1
2
3
4
5
6

D-REC-H

RF-SW

C-ROTA

D-V-SYNC

H-A-SW

H-A-COMP

TO SERVO/SYSTEM
CONTROL BLOCK

V-ENV

C-SYNC

TRICK-H

SECAM-H

IC370 (PAL/SECAM DECTECTOR)

28

1
29
17
14
18

2
16

PAL/SECAM
DETECTOR

1-10-3 1-10-4 H9520BLV

Audio Block Diagram

" " = SMD

NOTE FOR WIRE CONNECTORS:

1. PREFIX SYMBOL "CN" MEANS CONNECTOR.
(CAN DISCONNECT AND RECONNECT.)

2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER
HOLES OF THE PCB.
(WIRE IS SOLDERED DIRECTLY.)

PB-AUDIO SIGNAL REC-AUDIO SIGNAL Mode : SP/REC

MAIN CBA

TO Hi-Fi
AUDIO BLOCK

(DECK ASSEMBLY)

ACE HEAD ASSEMBLY

AUDIO
HEAD

AUDIO
ERASE
HEAD

N-A-PB
N-A-REC

CL287

A-PB/REC 4

A-COM 3

AE-H 1

AE-H/FE-H 2

CL504
4 A-PB/REC
3 A-COM
1 AE-H
2 AE-H/FE-H

Q404

Q403

BIAS
OSC

+5V

Q406

IC301

(AUDIO SIGNAL PROCESS) 1513 17

TUNER IN2

INV

R

ATT

P

REC
AMP

5
6

1
2

PB-ON

EQ
AMP

SP/LP-ON

AUTO
BIAS

98

7

3

100

IN1

ALC
DET

ALC

LINE
AMP

REC-ON

MUTE

12

11

FULL
ERASE
HEAD

FE HEAD

SERIAL

DECODER

68 69

71

A-MUTE-H
IIC-BUS SDA TO SERVO/SYSTEM
IIC-BUS SCL

CONTROL BLOCK

CL501
2 FE-H
1 FE-H-GND

Q401
(PB-ON)

Q405

SWITCHING
D-REC-OFF

+5V

AUDIO HD-SW
CONTROL

16

1-10-5 1-10-6 H9520BLA

Hi-Fi Audio Block Diagram

" " = SMD

JK1402

4

A-IN2(R)
A-IN2(L)
A-OUT2(R)
A-OUT2(L)

A-OUT1(R)
A-OUT1(L)
A-IN1(R)
A-IN1(L)

2
6
1
3

JACK CBA

JK101

1
3
2
6

A-IN2(R)
A-IN2(L)

5
1

A-OUT2(R)
A-OUT2(L)

2

NOTE FOR WIRE CONNECTORS:

1. PREFIX SYMBOL "CN" MEANS CONNECTOR.
(CAN DISCONNECT AND RECONNECT.)

2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER
HOLES OF THE PCB.
(WIRE IS SOLDERED DIRECTLY.)

CL2017CL2018

4
5
1
2

MAIN CBA

Q107

BUFFER

A,B

Q108

BUFFER

REC-AUDIO SIGNALPB-AUDIO SIGNAL Mode : SP/REC

IC751 (SW)

VCR

14

15

SW CTL

A,B

DVD

VCR
DVD

11109

13
12

1
2

Q752

DVD AUDIO SIGNAL

OUTPUT-SELECT

DVD-A(R)

DVD-A(L)

TO SERVO
/SYSTEM
CONTROL
BLOCK

TO DVD VIDEO
/AUDIO BLOCK
<DVD SECTION>

Comparison Chart of
Models & Marks

Model Mark

DVD757VR/00
DVD757VR/05
DVD757VR/02

A
B
C

REAR

TU701

AUDIO

A,B

TU- AUDIO

A-OUT(R)

A-OUT(L)

JK753
A-IN(L)-F

JK754
A-IN(R)-F

2

SIF

22
21

JK751

SIF

2

TU-AUDIO

1

TO AUDIO BLOCK

2
1

AFV CBA

IF SINAL
PROCESS

4
5

N-A-REC
N-A-PB

TU-AUDIO(R)
TU-AUDIO(L)

IC451 (MTS/ SAP/ Hi-Fi AUDIO PROCESS/ Hi-Fi HEAD AMP)

67
65

SW

SW

R-CH
BPF

LPF

MIX

LPF

L-CH
BPF

COMP

LIM

SERIAL
DATA
DECODER

DO
DET

34 33

ENV
DET

MUTE-ON

MUTE-ON

R

L

38

21

37

77

76

74

73

39
75
53

26

24

27

Q451

IIC-BUS SDA

IIC-BUS SCL

A-MODE

Hi-Fi-H-SW

LINE-MUTE

CL251

Hi-Fi-A(R) 7

Hi-Fi-COM 8

Hi-Fi-A(L) 9

TO
SERVO/ SYSTEM
CONTROL BLOCK

(DECK ASSEMBLY)

CYLINDER
ASSEMBLY

Hi-Fi
AUDIO
(R)
HEAD

Hi-Fi
AUDIO
(L)
HEAD

P

R

LIM DEV

LIM DEV

R

P

SW
NOISE

SW
NOISE

COMP

VCO

OUTPUT
SELECT

HOLD
PULSE

NOISE
DET

VCO

COMP

ALC

ALC

62 70

61 71

52
56
54
50

58
60

10

12

CN701CN1CN701 CN1

4
5

78
80

R-CH
INSEL

2
6

L-CH

8

4

INSEL

NOR
SW

48

14

R-CH
PNR

47

15

L-CH
PNR

1-10-7 1-10-8 H9520BLH

Power Supply Block Diagram

NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.

HOT CIRCUIT. BE CAREFUL.

CAUTION

FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T1.6AL/250V FUSE.

CAUTION !

Fixed voltage (or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F001) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.

Q053,Q054

SW+44V

P-ON+44V

AC1001

F1001
T1.6AL/250V

HOT

L1003

LINE

FILTER

Q1008

D001 - D004

BRIDGE

RECTIFIER

Q1003

POWER SUPPLY CBA

T001

2

4

Q1001

7

8

IC1001

ERROR
VOLTAGE DET

4

Q1009

(SHUNT REGULATOR)

1

23

REG

20

19

18

17

16

15

14

13

12

11

IC1051

+1.5V

REG.

IC1052

+3.3V
REG.

COLD

CL001 CL001 CN050

1 AL+44V
3 AL+12V
5 AL+5V
6 AL+5V
8 AL+20.5V

CL002 CL002

1 AL-30V
3 AL+1.5V
5 AL+3.3V
9 F1
8
7 P-OFF-H

10 PWSW

1
3
5
6
8

1
3
5
9
8F2
7

10

CN003

10
12
14
18
17
16
19

1

1

3

3

5

5

6

6

8

8
10
12
14
18
17
16
19

JUNCTION
CBA

Q1057

Q1056

SW+20.5V

Q051,
Q052

Q1059

Q1058

Q055

SW+9V

Q056

SW+5V

Q057

SW+12V

Q1053,
Q1054

Q058

SW+5V

Q1055

SW+5V

Q1052

SW+3.3V

MAIN CBA

Q059

P-ON+15V

P-ON-H

<FROM PIN 67 OF IC501>

AL+12V

AL+12V

AL+9V

AL+5V

P-ON+5V

TIMER+5V

P-DOWN-L

<TO PIN 86 OF IC501>

AL+20.5V/+12V
C-POW-SW

<FROM PIN 66 OF IC501>

PWRCON

<FROM PIN 18 OF IC2002>

PWSW

<FROM PIN 19 OF IC2002>

AL-30V

FIP+3.3V
EV+5V
DVD P-ON+5V

DVD P-ON+3.3V

DVD P-ON+12V

-FL

F1

F2
P-OFF-H

<TO PIN 73 OF IC501>

FIL-ON/OFF

<TO PIN 24 OF IC501>

CN1051

13 P-ON+5V
14 EV+9V
15 EV+9V
17 P-ON+3.3V

1 EV+1.5V
2 EV+1.5V
3 EV+1.5V
4 EV+3.3V
5 EV+3.3V

1-10-9 1-10-10 H9520BLP