Sony AVDK-700-P Service manual

AVD-K700P

SERVICE MANUAL

Ver 1.0 2004.06

AVD-K700P is the amplifier, DVD/VIDEO
player and tuner section in HT-V700DP.

• Manufactured under license from Dolby Laboratories. "Dolb y",
"Pro Logic", and the double-D symbol are trademarks of Dolby
Laboratories.
Confidential unpublished works. Copyright 1992 -1997 Dolby
Laboratories. All rightsreserved.

• DTS and DTS Digital Surround are registered trademarks of

Digital Theater Systems, Inc.

SPECIFICATIONS

General

Power requirements AC 120V, 60 Hz

Power consumption 110 W

Dimensions (approx.) 430 x 83 x 376 mm (17 x 3

Mass (approx.) 6.2 kg (13 lb11 oz)

Operating temperature 5˚C to 35˚C (41˚F to 95˚F)

Operating humidity 5 % to 90 %

Signal system NTSC

DVD Section

Laser system Semiconductor laser (Wavelength

Frequency response DVD (PCM 48 kHz): 8 Hz to 22 kHz,

Signal-to-noise ratio More than 80 dB (AUDIO OUT

Harmonic distortion Less than 0.3%

Dynamic range More than 85 dB (AUDIO OUT

Inputs

ANTENNA IN Antenna or CATV input, 75 ohms

VIDEO IN 1 Vp-p 75 ohms, sync negative,

AUDIO IN -6.0 dBm more than 47 kohms,

FM ANTENNAIN FM antenna input, 75 ohms
AM ANTENNAIN AM antenna input, 300 ohms

OPTICAL IN Optical connector x 1

7

/8inches) (W x H x D)

14

DVD : 650 nm, CD : 780nm)

CD: 8 Hz to 20 kHz
jacks)

jacks)

RCA jack x 2

RCA jack (L, R) x 2

3

/8 x

DVD Mechanism T ype DP-7C

VCR Mechanism T ype D-37

Outputs

COMPONENT VIDEO OUT

Audio output (analog audio) 2.0 Vrms (1 KHz, 0 dB), 330 ohms,

VIDEO Section

Maximum recording time SP: 2 HOURS (T-120), EP: 6 HOURS

US Model

Model Name Using Similar Mechanism AVD-K600P

Optical Pick-up Name PVR-502W

VIDEO OUT 1 Vp-p 75 ohms, sync negative

ANTENNA OUT Channel 3 or 4 (Switchable)

Head system 4 heads helical scan azimuth system

Timer 12-hour display type with AM, PM

Tape speed SP: 33.35 mm/sec, EP: 11.12 mm/sec

Tape width 12.7 mm

Rewind time About 150 seconds (T-120)

Antenna 75 ohms (VHF/UHF)

Channel coverage VHF: 2-13, UHF: 14-69, CATV: 1-125

Frequency range 20Hz to 20kHz

Signal-to-noise ratio More than 43dB

Dynamic range More than 85 dB (AUDIO OUT jacks)

Channel separation More than 55 dB (AUDIO OUT jacks)

(Y) 1.0 V (p-p), 75 ohms, negative
sync, RCA jack x 1
(P

B/CB

)/(PR/CR) 0.7 V (p-p), 75 ohms,

RCA jack x 2

RCA jack (L, R) x 1

(T-120)/8 HOURS (T-160)

(4A, A-W, W+1 - W+84, A-5 - A-1)

– Continued on next page –

9-879-041-01

2004F1678-1
© 2004.06

DVD/VCR RECEIVER

Sony Corporation

Home Audio Company
Published by Sony Engineering Corporation

AVD-K700P

FM Tuner

Intermediate Frequency

Tuning Range

87.5 - 108.0 MHz

10.7 MHz

AM Tuner

Intermediate Frequency

Tuning Range

530 - 1,720 kHz
450 kHz

AUDIO POWER SPECIFICATION

POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
With 6 ohm loads, both channels
driven, from 120 - 20,000 Hz; rated
90 watts per channel minimum RMS
power, with no more than 10 % total
harmonic distortion from 250 milli
watts to rated output (USA model
only).

Amplifier

Stereo mode 90 W + 90 W (6Ω at 1 kHz, THD

Surround mode Front: 90 W/ch (6Ω at 1 kHz, THD

Inputs VIDEO 1, VIDEO 2, OPTICAL IN

Design and specifications are subject to change without notice.

10 %)
10 %)

Center*: 90 W (6Ω at 1 kHz, THD
10 %)

Surround*: 90 W/ch (6Ω at 1 kHz,
THD 10 %)

Subwoofer*: 150 W (4Ω at 30 Hz,
THD 10 %)

*

Depending on the sound mode settings
and the source, there may be no sound
output.

Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.

This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be

damaged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270 °C
during repairing.

• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering
or unsoldering.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead­free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

• Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.

• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

2

AVD-K700P

r

SAFETY CHECK-OUT

After correcting the original service problem, perform the following
safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage.
Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA
WT -540A. Follow the manuf acturers’ instructions to use these
instruments.

2. A battery-operated A C milliammeter . The Data Precision 245
digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC v oltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-v oltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples
of a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2 V A C range are suitable. (See
Fig. A)

To Exposed Metal
Parts on Set

NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick­up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION
CHECK

Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output several times.

AC

0.15 µF

1.5 k

Ω

Earth Ground

voltmete
(0.75 V)

Fig. A. Using an AC voltmeter to check AC leakage.

3

AVD-K700P

TABLE OF CONTENTS

1. GENERAL ................................................................... 5

2. ELECTRICAL ADJUSTMENT

2-1. VCR Section Electrical Adjustment ................................ 9

2-2. Electrical Troub leshooting Guide.................................... 10

2-3. DVD & AMP Section

Electrical Troubleshooting Guide.................................... 24

3. MECHANICAL ADJUSTMENT

3-1. Video Mechanism Deck Section ..................................... 32

3-2. Maintenance/Inspection Procedure ................................. 39

4. EXPLODED VIEWS

4-1. Block Diagram – POWER (SMPS) Section-1 – ............. 44

4-2. Block Diagram – POWER (SMPS) Section-2 – ............. 45

4-3. Block Diagram – Y/C Section – ...................................... 46

4-4. Block Diagram – NORMAL AUDIO Section –.............. 47

4-5. Block Diagram – HI-FI Section – ................................... 48

4-6. Block Diagram – SYSTEM Section –............................. 49

4-7. Schematic Diagram – POWER Section-1 – ................... 50

4-8. Schematic Diagram – POWER Section-2 – ................... 51

4-9. Schematic Diagram – SYSTEM Section –..................... 52

4-10. Schematic Diagram – AVCP Section – .......................... 53

4-11. Schematic Diagram – HI-FI/TUNER Section –............. 54

4-12. Schematic Diagram – A/V JACK, SCART Section – .... 55

4-13. Schematic Diagram – KEY/TIMER Section –............... 56

4-14. Schematic Diagram – MPEG & VIDEO Section – ........ 57

4-15. Schematic Diagram – RF & SERVO Section –.............. 58

4-16. Schematic Diagram – AUDIO MICOM Section – ......... 59

4-17. Schematic Diagram – DIGITAL AMP Section – ........... 60

4-18. Schematic Diagram – PWM & CODEC Section – ........ 61

4-19. Schematic Diagram – INTERFACE Section – ............... 62

4-20. Printed Wiring Board – VCR Section –........................... 63

4-21. Printed Wiring Board – DISPLAY Section – .................. 64

4-22. Printed W iring Board

– DVD & AMP Section (Component Side) – ................. 65

4-23. Printed W iring Board

– DVD & AMP Section (Conductor Side) – ................... 66

4-24. Printed Wiring Board – SMPS Section – ........................ 67

4-25. Printed Wiring Board – KEY Section – .......................... 68

5. EXPLODED VIEWS

5-1. Overall Section ................................................................ 69

5-2. DVD Mechanism Deck ................................................... 70

5-3. Front Loading Mechanism Section ................................. 71

5-4. Moving Mechanism Section (1)...................................... 72

5-5. Moving Mechanism Section (2)...................................... 73

6. ELECTRICAL PARTS LIST .................................. 74

4

Front Panel

ML

DVD: Go to NEXT chapter/track. Press and hold for a fast forward search.

VIDEO: Advances the tape from STOP mode or for fast forward picture search.

X (PAUSE)

Pause playback or recording

temporarily.

z REC/ITR

To record normally or to activate Instant Timer Recording.

A DVD

Opens or closes
the disc tray.

Remote Sensor

Point the DVD/VCR Receiver remote
control here.

Display window

Shows the current sta­tus of the DVD/VCR
Receiver.

Disc Tray (DVD deck)

Insert a disc here.

@ / 1

Switches the DVD/VCR Receiver ON and OFF.

lm

DVD: Go to beginning of current chapter/track or to previous chapter/track.

Press and hold for a fast reverse search.

VIDEO: Rewinds the tape from STOP mode or for fast reverse picture search.

H (PLAY)

To play back a disc or

a recorded tape.

x (STOP)

Stops playback or recording.

INPUT SELECT

Selects the VIDEO

deck’s source

(Tuner, LINE 1 or

LINE 2).

CH/PRESET (+/–)

Scans up or down through

memorized channels or radio

frequencies (stations).

TUNER FM/AM

Selects Radio opera-

tion mode.

VIDEO 2 IN(VIDEO/AUDIO IN (Left/Right))

- Connect the audio/video output of an
external source (Audio system, TV/ Monitor,
another VCR).

- Use the left channel when external source is
MONO.

Video Cassette Compartment (VIDEO deck)

Insert a video cassette here.

A VIDEO

Ejects the tape in the VIDEO deck.

VOLUME

Adjusts sound level of speakers.

DVD/VIDEO

Toggles control

between the DVD deck

and the VIDEO deck.

SECTION 1

GENERAL

AVD-K700P

This section is extracted
from instruction manual.

5

AVD-K700P

Display Window

Indicates encoding format of the
current disc.

Indicates sound mode is
DOLBY PROLOGIC II.

Indicates repeat mode

Lights when TV mode is
active.

VIDEO DVD/VCR
Receiver is recording.

A cassette is in the VIDEO deck.

SP EP Displays the recording

and playback speed.

HI-FI Indicates the unit is

playing back a tape record-

ed in Hi-Fi.

REC DVD/VCR Receiver

is Recording.

TIMER DVD/VCR Receiver is in

timer recording or a timer recording

is programmed.

TUNED Indicates a AM or FM

broadcast is being received.

ST (STEREO) Indicates a

stereo broadcast is being

received.

PL

PCM

MP3

DVD
VCD

MP3 MP3 disc inserted
DVD DVD inserted.
VCD Video CD inserted

REP 1A - B TV
PROGRESSIVE

PBC
SAP

SHUF PGM

SHUFFLE Random playback active

PBC Indicates PBC On mode
SAP Indicates when a SAP BILINGUAL broadcast

is being received.

VIDEO

PGM Programmed playback active.

TITLE CHAP

Indicates when the Progressive scan playback is in progress.

TRK ST TUNED

Indicates clock, total playing time, elapsed time, chapter number, track
number, channel, radio frequency, volume, channel or current deck
status (Playback, Pause, etc).

TIMER

SP

EP

6

Remote Control

AVD-K700P

VIDEO

Select the output source to VIDEO.

DVD

Sets the output source to DVD.

INPUT SELECT

Selects the VIDEO deck’s source

(L1 OPT, LINE1, LINE2, Tuner).

TUNER FM/AM

Selects the DVD/VCR Receiver’s tuner as

the listening choice. (FM and AM bands)

0-9 numerical buttons

Selects numbered options in a menu.

TUNING (+/–)

To tune in the desired station.

MEMORY

Memorize a radio station frequency into

the tuner.

SHUFFLE

Plays tracks in random order.

PROGRAM

Enters to the program edit mode or exits

from that.

z REC/ITR

Records normally or activates Instant

Timer Recording.

TV/VIDEO

To view channels selected by the VIDEO

tuner or by the TV tuner.

SP/EP

Selects recording speed.

CM SKIP

Fast forwards picture search through 30

seconds of recording.

ANGLE

Selects a DVD camera angle if available.

SUBTITLE

Selects a subtitle language.

AUDIO

Selects an audio language (DVD) or an

audio channel (CD).

REPEAT

Repeat chapter, track, title, all.

A-B

Repeats sequence.

SETUP/MENU

Accesses or returns DVD setup menu

and VIDEO setup menu.

TV @ / 1

Switches TV ON and OFF.

@ / 1

Switches DVD/VCR Receiver ON and OFF.

TV Control Buttons (see page 40)

• VOL +/–: Adjusts TV’s volume.

• CH +/–: Selects TV’s channel.

• TV/VIDEO: Selects the TV’s source.

CLEAR

Removes a track number on the program
menu. To clear preset stations from the
tuner memory.

Playback Control Buttons

• H (PLAY)

Starts playback.

• x (STOP)

Stops playback.

• . (PREV) (DVD mode only)

Go to beginning of current chapter or
track or go to previous chapter or track.

• > (NEXT) (DVD mode only)

Go to next chapter or track.

• m/M (SLOW t/T)

DVD: For picture search or slow play­back backward or forward.
VIDEO: Rewinds or advances the tape
in STOP mode or for picture search.

• X (PAUSE)

Pause playback or recording temporari­ly.

SOUND FIELD

Selects sound mode between AUTO,
PRO LOGIC, PRO LOGIC II (MOVIE,
MUSIC, MATRIX) and 3D SURROUND.

VOL (+/-)

Adjusts speaker volume.

MUTING

Momentarily silence the speaker of the
DVD/VCR Receiver.

DVD TOP MENU

Displays the disc’s Title menu, if available.

DVD MENU

Accesses menu on a DVD disc.

B/b/V/v (left/right/up/down)

Selects an option in the menu.
CH/PRESET(+/–): Selects a program of
VIDEO or Tuner. Adjusts manually the
tape’s picture onscreen.

ENTER

Acknowledges menu selection.

DVD DISPLAY, CLK/CNT

Accesses On-Screen display. Switches
among the clock and tape counter.

RETURN

Returns the setup menu.

Note

This remote control uses the same buttons for VIDEO and DVD
functions (ex. PLAY).
To use the VIDEO, first press the VIDEO button.
To use the DVD, first press the DVD button.

7

AVD-K700P

Rear Panel

VIDEO 1 (VIDEO/AUDIO IN (Left/Right))

Connect the audio/video output of an

external source (Audio system, TV/Monitor,

Another VCR).

AC Power Cord

Plug into the power
source.

ANTENNA OUT (DVD/VIDEO OUT)

Connect to a TV with RF coaxial inputs.

Connect the six supplied speakers to these terminals.

MONITOR (VIDEO / AUDIO OUT (Left/Right))

Connect to a TV with video and audio inputs.

COMPONENT VIDEO OUT (Y P

B/CBPR/CR

(DVD OUT)

Connect to a TV with Y P

B/CBPR/CR

inputs. FOR DVD

VIEWING ONLY.

ANTENNA IN

Connect the VHF/UHF/CATV
antenna to this terminal.

SPEAKERS Connectors

)

Connect to a digital audio output on a digital device.

Dust Protection Cap

Remove the dust protection cap from the OPTICAL IN
jack and connect the optical digital cable (not supplied)
securely so that the configurations of both the cable
and the connector match. Keep the dust protection cap
and always reattach the cap when not using the con­nector to protect against dust intrusion.

Do not touch the inner pins of the jacks on the rear
panel. Electrostatic discharge may cause permanent
damage to the unit.

OPTICAL IN

AM ANTENNA Connectors

Connect the AM antenna to this terminal.

FM ANTENNA Connectors

Connect the FM antenna to this terminal.

Remote control battery installation

Detach the battery cover on the rear
of the remote control, and insert two

AA

AA

Caution

Do not mix old and new batteries. Never mix different
types of batteries (standard, alkaline, etc.).

R6 (size AA) batteries with and
aligned correctly.
When using the remote control, point
it at the remote sensor on the unit.

8

SECTION 2

ELECTRICAL ADJUSTMENT

2-1. VCR SECTION ELECTRICAL ADJUSTMENT

1. Servo Adjustment

1) PG Adjustment

• Test Equipment
a) OSCILLOSCOPE
b) NTSC MODEL : NTSC SP TEST TAPE

• Adjustment And Specification

AVD-K700P

MODE

PLAY

MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION

V.Out

H/SW(W373, W374)

R/C TRK JIG KEY 6.5 ± 0.5H

• Adjustment Procedure

a) Insert the SP Test Tape and play.
b) Press the “O” key on the Remote controller and the “PLAY” key on the Front Panel the same time, the

unit then goes in to Tracking initial mode.

c) Trigger the mixed Combo Video Signal of CH2 to the CH1 H/SW(W373, W374), and then check the dis-

tance (time difference), which is from the selected A(B) Head point of the H/SW(W373, W374) signal to
the starting point of the vertical synchronized signal, to 6.5H ± 0.5H (412µs, 1H=63µs).
Note - Press FRONT CH UP KEY and FRONT PLAYKEYon Deck playback, and it goes in to ATR PRE-

SET. after the SP Test Tape is inserted.

• PG Adjustment Method

a-1) Playback the SP standard tape
b-2) Press the “O” key on the Remote controller and the “PLAY” key on the Front Panel the same time,

Tracking initial mode.
c-3) Repeat the above step(No.b-2), the unit will then finish the PG adjusting automatically.
d-4) Stop the playback, the unit then exits PG adjusting mode after saving the PG data.

• CONNECTION

V.Out

•WAVEFORM

H/SW(W373, W374)

H/SW

Composite

VIDEO

6.5H(412µs)

R/C KEY

OSCILLOSCOPE

CH1 CH2

H/SW

(W373, W374)

V.out

9

AVD-K700P

2-2. ELECTRICAL TROUBLESHOOTING GUIDE

1. Power(SMPS) CIRCUIT

(1) No 5.3VA (SYS/Hi-Fi/TUNER)

NO 5.3VA.

YES

Is the F101 normal?

YES

Is the BD101

NO

NO

Replace the F101.

(Use the same Fuse)

normal?

YES

Is the TH101
normal?

YES

Is Vcc(8.5~21V) sup-

NO

NO

Replace the TH101.

plied to IC104 Pin3?

YES

Check or Replace
the D105.

Replace the
BD101.

Is the D105
normal?

NO

(2) No 12VA (TO CAP, DRUM MOTOR)

NO 12VA.

YES

Is the Vcc(13V) supplied

NO

to (+) terminal in D126?

YES

Check or Replace
the D126.

Check or Replace
the Motor Vcc.

(3) No 5.0V (SYS/Hi-Fi/TUNER)

Is the D129
normal?

YES

Is there about 2.5V
at the IC106 Vref?

YES

Check the Main PCB

5.3VA/5.0V Line short?

NO

NO

Replace the D129.

Replace the IC106.

NO 5.0VA.

YES

Is 5.3VA put into
the Q167 Emitter?

YES

Is the Q169 Base
“H”?

YES

Is about 5V put into
the Q167 Base?

YES

Check or Replace
the Q167/Q169.

NO

NO

NO

5.3VA Line Check.

Check the Power
Control.

Check or Replace the
Q169, R175, R176, R177.

10

AVD-K700P

(4) No 5V (TO DVD)

NO 5V.

YES

Is 5.3VA put into
the Q168 Emitter?

YES

Is the Q169 Base
“H”?

YES

Is about 5V put into
the Q168 Base?

YES

Check or Replace
the Q168/Q169

NO

NO

NO

5.3VA Line Check.

Check the Power
Control.

Check or Replace the
Q169, R175, R176, R177.

(5) No 33V (TUNER)

No 33V.

YES

Is Q163 Base “H”?

YES

Check or Replace
Q163, R168, R169.

NO

Check the Power
Control.

(6) No 8V(TO DVD)

NO 8V.

YES

Is Vcc(13V) supplied to
(+) terminal in D126?

YES

Is Vcc(12V) supplied
to IC160 Pin1?

YES

Check or Replace
IC161, C163.

NO

NO

Check or Replace
the D126.

Check or Replace
the D163.

11

AVD-K700P

2. SYSTEM/KEY CIRCUIT

(1) AUTO STOP

Auto Stop

YES

Does the SW30 waveform
appear at the IC501
Pin18?

YES

Do the T-UP Reel Pulses
appear at the IC501 Pin80?

YES

Replace the IC501.

NO

NO NO

Check the Drum Motor
signal.

Do T/UP Reel Pulses
appear at the point
between R556 and R536?

YES YES

Replace the T/UP Reel
Sensor (RS501).

(2) The unstable loading of a Cassette tape

The unstable loading of a

Cassette tape

YES

Does 5V appear at the
RS501?

NO

Check the Q160 Power
Circuit.

Is 12V applied to the

PMC01 Pin8?

YES

Does the “H” signal appear
at the IC501 Pin58 during
inserting the CST ?

YES

Does the “L” signal appear
at the IC501 Pin60 during
inserting the CST?

YES

Check the Deck
Mechanism.

Caution :

Auto stop can occur because Grease or Oil has dried up

NO

NO

NO

Check the CST SW and
the peripheral circuitry.

Refer to “SMPS DRUM
12 Volt Trouble Shooting”.

Is 5V applied to the
R531 ?

YES

Refer to SMPS 5.3VA
troubleshooting.

Check the IC501
Pins22, 23, 24, 25.

NO

12

3. SERVO CIRCUIT

(1) Unstable Video in PB MODE

Unstable Video in
PB Mode.

YES

Does the Noise level of the
screen change
periodically?

YES

AVD-K700P

Do the CTL pulses appear
at the IC501 Pin97?

YES

Does the CFG waveform
appear at the IC501
Pin87?

YES

On tracking do the CTL
pulses move?

YES

Does the Video Envelope
waveform appear at the
IC501 Pin9?

YES

Replace the IC501.

(2) When the Drum Motor

(2) doesn’t run.

When the Drum Motor
doesn’t run,

Does 12V appear at the
PMC01 Pin8?

NO

NO

NO

NO

Is adjusting the height of
the CTL Head accurate?

Replace the IC501.

Refer to “When the Y signal
doesn’t appear on the
screen in PB Mode”.

Refer to “(2)
No 12VA of Power section”

Do the Drum PWM Pulses
appear at the IC501
Pin76?

YES

Aren’t the foil patterns and
the Components between
IC501 Pin76 and PMC01
Pin12 short?

NO

Readjust the height of the
CTL Head.

NO

Do the DFG Pulses appear
at the PMC01 Pin11?

YES

NO

Replace the Cap M.

YES

Does 2.8V appear at the
PMC01 Pin12?

YES

Check the connector
(PMC01) and the Drum
Motor Ass’y .

NO

Do the DFG Pulses appear
at the IC501 Pin90?

YES

Do the Drum PWM Pulses
appear at the IC501
Pin76?

YES

Aren’t the connecting patterns and the Components
between IC501 Pin76 and PMC01 Pin12 short?

NO

NO

Aren’t the foil patterns and
the Components between
IC501 Pin 90 and PMC01
Pin11 short?

Replace the IC501.

13

AVD-K700P

(3) When the Capstan Motor doesn’t run,

When the Capstan Motor doesn’t run,

Does 12VA appear at the PMC01?

YES

Is “DRUM CTL” 2.8V appear at the
PMC01?

YES

Check the PMC01 and the Capstan
Motor Ass’y .

Aren’t the foil patterns and Components
between IC501 Pin77 and PMC01
Pin9 short?

Does the CFG signal come into the
IC501 Pin87?

NO

NO

YES

YES

Refer to “SMPS(CAPSTAN/12Volt)
Trouble Shooting”.

Does the PWM signal appear at the
IC501 Pin77?

NO

Does the CFG signal appear at the
PMC01 Pin1?

NO

Check the Capstan Motor Ass’y.

YES

Does the Capstan PWM signal appear at
the IC501 Pin77?

YES

Aren’t the foil patterns and Components
between IC501 Pin77 and PMC01
Pin9 short?

NO

Aren’t the foil patterns and component
between IC501 Pin87 and PMC01
Pin1 short?

NO

Replace the IC501.

14

(4) KEY doesn’t working

KEY doesn’t working.

AVD-K700P

Is 5V applied to the IC501
Pin2, 3?

YES

Does LED or FLD change
when a function button is
pressed?

4. OSD CIRCUIT

(1) No OSD display.

No OSD or F.OSD display.

Is 5.3V applied to the
IC501 Pin53?

YES

Does oscillation occur at
the IC501 Pins44, 45?

YES

NO

NO

NO

NO

Refer to “SMPS 5.3VA
Trouble Shooting”.

Replace the defective
switches.

Refer to “SMPS 5.3VA
Trouble Shooting”.

Check or Replace the phe­ripheral Circurity.(L511,
R598, C596, C595)

Replace the IC501.

2

C BUS CHECK

(2) I

The I2C waves don’t
come out.

Does Power appear at the
Pull up impedence
(R569, R507)?

YES

Replace the IC501.

NO

Refer to “SMPS 5.3VA
Trouble Shooting”.

15

AVD-K700P

5. Y/C CIRCUIT

(1) No Video in EE Mode,

No Video in EE Mode

Does the Video signal
appear at the IC301
Pins28, 30, 32?

YES

Is REG 5.0V applied to the
IC301Pins23, 44, 45, 52, 68,
77?

YES

Does the Video signal
appear at the IC301 Pin26?

NO

NO

NO

Does the Video signal
appear at the IC302
Pins1, 5?

YES

Is there 5V at the IC302
Pin6?

YES

Replace the IC302.

Check the REG 5V Line.
(Power Circuit)

Is I2C BUS signal applied to
the IC301 Pins53, 54, 55?

NO

NO

Check DVD Video Input
(IC602, Pin4), Tuner Video
Input (TU701 Pin16), Line
Video Input (JK601),
respectively.

Check the System Circuit.
(Refer to ‘SYSTEM I
CHECK Trouble Shooting’)

2

C BUS

YES

Does the Video signal
appear at the IC501 Pin52?

YES

Does the Video signal
appear at the IC602 Pin7?

NO

NO

YES

Check the path of the sig­nal between the IC301 Pin
26 and IC501 Pins50, 52.

Is there 5V on the plus
terminal of the C614?

YES

Replace the IC602.

NO

Replace the IC301.

Check the REG 5V Line.
(Power Circuit)

16

AVD-K700P

(2) When the Y(Luminance) signal doesn’t appear on the screen in PB Mode,

Is 5V applied to the IC301
Pins23, 44, 45, 52, 68, 77?

Is the Y/C Bus siganl
applied to the IC301
Pins53, 54, 55?

Does the normal RF signal
appear at the IC301 Pin14?

Check the line of the REG
5V Line. (Power Circuit)

Check the System Circuit.
(IC501 Pin18)

Check the V.H.S/W level.

Refer to ‘SYSTEM Y/C
BUS CHECK Trouble
Shooting’.

Is the V.H.S/W signal
applied to the IC301 Pin57?

Does the Rectangular
waveform(5V) appear at
the IC301 Pin57(V.H.S/W)

Clean the Drum.

Check the C324.

Check the R328, R347,
C322, C323.

Does the Y(Luminance)
signal appear at the IC301
Pin20?

Is the Y(Luminance) Video
waveform showed up at the
IC301 Pin22?

Replace the IC301.

NO

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

17

AVD-K700P

(3) When the C(Color) signal doesn’t appear on the screen in PB Mode,

Is 5V applied to the IC301
Pins23, 44, 45, 52, 68, 77?

YES

Does the fsc signal appear
at the IC301 Pins41, 50?

YES

Replace the IC301.

NO

NO

Check the line of the REG
5V Line. (Power Circuit)

Is normal the X301
(3.58MHZ) of oscillation
Frequency?

Does the Color signal
appear at the IC301 Pin48?

YES

Replace the IC301.

NO

NO

Replace the X301.

Check the C342, C341,
R333.

18

(4) When the Video signal doesn’t appear on the screen in REC Mode,

YES

YES

YES

YES

YES

YES

NO

NO

YES

YES

YES

YES

YES

Check system part
(V.H/SW)

Replace the IC301.

Check the drum

*OPTION
Pins72, 73, 74(SP)
Pins65, 66, 67(EP)

REC mode

Check the EE mode

NO

Is EE mode normal?

Is color

normal?

A

A

YES YES

Is brightness normal?

Does signal appear at
IC301 Pins41, 50?

NO

Check X301 oscillation
frequency.

YES

Is the brightness signal sup­plied to IC301 Pins18?

Is 5V supplied to IC301
Pins23, 44, 45, 68, 77?

Check the power of Pins23,
44, 45, 52, 68, 77.

Check the 5V power

NO

NO

NO

NO

NO

Is Y/C Bus applied to
IC301 Pins53, 54, 55?

Check the REG 5V power

Check system part

Do X301 and X-TAL
oscillate?

Check X301.

Is V.H SW supplied to
IC301 Pin57?

Does the FM signal appear
at IC301 Pins73(SP)/
66(EP)?

AVD-K700P

19

AVD-K700P

6. Tuner/IF CIRCUIT

(1) No Picture on the TV screen

No picture on the TV
screen

YES

Does the Video signal at
the TU701 Pin16.

YES

NO

Is +33V applied to TU701
Pin14?

YES

Is +5V applied to TU701
Pin3?

YES

Does the Clock signal
appear at TU701 Pin9?

YES

Does the data signal
appear at TU701 Pin10?

YES

Replace Tuner.

NO

NO

NO

NO

Check 33V line.

Check 5V line.

Check the lIC Clock Signal
of µ-COM Pin71.

Check the lIC Data Signal
of µ-COM Pin72.

Does the video signal
appear at IC302 Pin7.

YES

Does the Video signal at
the IC501 Pin 52.

YES

Does the Video signal at
the IC602 Pin 7.

YES

Check the signal flow from IC602
Pin7 to JK601 Pin Video out.

NO

NO

NO

Check the signal flow from
IC501 Pin27.(Pin27 is ‘L’
state in Tuner Mode)

Check the signal from IC301
Pin26 to IC501 Pin50.

Check the signal from IC501 Pin52 to IC602 Pin1 and IC602 Pin2.
(IC602 Pin2 is ‘L’state in VHS mode)

20

AVD-K700P

(2) No Sound

No Sound.

Check the Vcc of TU701 Pins3, 14.

YES

Check 5.2V, 33V Line.

NO

Check the Tuner SiF signal at IC801
Pin57.

YES

Check the Audio of IC801 Pins78, 80.

YES

Check the Signal flow from IC801 Pins78,
80 to JK601 Audio out(L), (R)

YES

Check the Tuner SIF of TU701 Pin13.

NO

1. Check the Vcc(5.3VA, 9V) of IC801
Pins3, 5, 36, 54.

2. Check the IIC Clock and Data at IC801
Pins37, 38.

NO

21

AVD-K700P

7. Hi-Fi Circuit

A.

Hi-Fi Playback.

No sound

Check the Hi-Fi Selection
Switch and the Tape quality.

YES

Is the RF waveform at
IC801 Pin 23 over 3V
Vp-p?

YES

NO

Is Pin 30 of IC801 over

3.5V ?

YES

Check the Vcc of IC801.
(Pins 3, 15, 32, 46)

YES

NO

YES

Is the Head switching signal
IC801 Pin 39 O.K?

YES

NO

NO

Check power.

Check REC start “H” signal
of µ-COM.

Check IC501 Pin 19.

(Audio Swich 30)

Check IC801 Pin 37(Data),
Pin 38(Clock).

YES

Is IC801 Pin 49(A.Mute)
“High”?

YES

Do Audio signals appear at
IC801 Pin 80(L-CH),
78 (R-CH)?

YES

Check the Contact point
of Audio Output.

Check the connection at
P3D01 if good then
Replace IC801.

NO

Check Ports of µ-COM.

Check A.MUTE port of
µ-COM (Pin High of
IC501).

NO

Replace IC801.

22

B.

Hi-Fi REC.

It is impossible to record and playback
Hi-Fi Audio signal.

YES

Check Vcc of IC801. (Pins 3, 15, 32, 46)

AVD-K700P

YES

Check IC801 Pin 37(Data),Pin 38(CLOCK).

YES

Is IC501 Pin 84(A.Mute) “High”?

YES

Are Audio signals present at IC801

Pins 78, 80?

YES

Do FM Audio signals appear at IC801
Pin 26?

YES

Is IC801 Pin 17(REC “H”) “High”?

NO

Check Power.

NO

Check ports of µ-COM.

NO

Check the Port of µ-COM.

NO

Check Audio Input signal Line
(9, 11, 12, 71, 73, 74), Tuner(57).

NO

Replace IC801.

YES

Check the Contact Points of Drum

Connector if good then Replace the Drum.

NO

Check the Port of u-COM.

23

AVD-K700P

2-3. DVD & AMP SECTION ELECTRICAL TROUBLESHOOTING GUIDE

1. System operation flow

Power On

1. 8032 initializes SERVO, DSP & RISC registers

2. Write RISC code to SDRAM

3. Reset RISC

Show LOGO

Yes

SLED Moves to Inner Position

1. Judge whether have disc and disc type

2. Jump to related disc reading procedure

Tray Closed?

No

Tray Close to Closed position

SLED at Inner

Side?

No

Recieve

OPEN/ CLOSE

Key?

Yes

No

1. Execute Pressed Key & IR Key

2. Systemoperati on Routi ne Loop

1. Stop Playback & Open Tray

2. Display tray open message & LOGO

No

Receive

CLOSE Key?

24

Yes