Philips vr 109 Service Manual
06/28/2012
World of Free Manuals
MAIN SECTION
06/28/2012
World of Free Manuals
VIDEO CASSETTE RECORDER
Sec. 1: Main Section
● Specifications
● Adjustment Procedures
● Schematic Diagrams and CBA’s
● Exploded Views
● Mechanical and Electrical Parts Lists
TABLE OF CONTENT S
SPECIFICATIONS ........................................................................................................................................ 1-1-1
IMPORTANT SAFETY PRECAUTIONS ........................................................................................................ 1-2-1
STANDARD NOTES FOR SERVICING ......................................................................................................... 1-3-1
FUNCTION INDICATOR SYMBOLS .............................................................................................................1-4-1
PREPARATION FOR SERVICING.................................................................................................................1-5-1
OPERATING CONT ROLS AND FUNCTIO NS .............................................................................................. 1-6-1
SIGNAL NAME ABBREVIATIONS.................................................................................................................. 1-7-1
CABINET DISASSEMBLY INSTRUCTIONS.................................................................................................. 1-8-1
ELECTRICAL ADJUSTMENT INSTRUCTIONS............................................................................................. 1-9-1
ADJUSTMENT POINTS AND TEST POINTS................................................................................................1-9-2
BLOCK DIAGRAMS ....................................................................................................................................... 1-10-1
SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS .................................................................................1-11-1
MAIN 1/4 SCHEMATIC DIAGRAM PARTS LOCATION GUIDE .................................................................1-11-2
MAIN 1/4 SCHEMATIC DIAGRAM .............................................................................................................1-11-3
MAIN 2/4 SCHEMATIC DIAGRAM .............................................................................................................1-11-6
MAIN 2/4 SCHEMATIC DIAGRAM PARTS LOCATION GUIDE .................................................................1-11-8
MAIN 3/4 SCHEMATIC DIAGRAM..............................................................................................................1-11-9
MAIN 3/4 SCHEMATIC DIAGRAM PARTS LOCATION GUIDE .................................................................1-11-11
MAIN 4/4 SCHEMATIC DIAGRAM .............................................................................................................1-11-12
FUNCTION SCHEMATIC DIAGRAM .........................................................................................................1-11-12
MAIN 4/4 SCHEMATIC DIAGRAM PARTS LOCATION GUIDE .................................................................1-11-14
MAIN CBA TOP VIEW ................................................................................................................................1-11-15
MAIN CBA BOTTOM VIEW ........................................................................................................................1-11-18
MAIN CBA PARTS LOCATION GUIDE.......................................................................................................1-11-21
FUNCTION CBA TOP VIEW / BOTTOM VIEW ..........................................................................................1-11-23
WAVEFORMS................................................................................................................................................. 1-12-1
WIRING DIAGRAM......................................................................................................................................... 1-13-1
SYSTEM CONTROL TIMING CHARTS......................................................................................................... 1-14-1
IC PIN FUNCTION ......................................................................................................................................... 1-15-1
LEAD IDENTIFICATIO NS............................................................................................................................... 1-16-1
ELECTRICAL PARTS LIST ............................................................................................................................ 1-17-1
EXPLODED VIEWS........................................................................................................................................ 1-18-1
SET MECHANICAL PARTS LIST................................................................................................................... 1-19-1
H67T0CV
SPECIFICATIONS
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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
1-3. Video S/N Y (R/P)
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 -6 -3 SP Mode
3-2. Output (R/P) dBV -9 -6 -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 -11 -4 SP Mode
(-20dB ref. 1kHz) at 8kHz dB -14 -4 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 42 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
dB 40 45
SP Mode,
W/O Burst
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 wor st condition that still might be
considered acceptable; In no case should a unit fail to meet limit specs.
1-1-1 H67T0SP
IMPORTANT SAFETY PRECAUTIONS
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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.U se 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 con-
nectors, first, disconnect the AC plug from the AC
outlet.
U21_PAL 1-2-1 SFTY_06
Safety Check after Servicin g
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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
≥ 3mm(d)
≥ 6 mm(d’)
Chassis or Secondary Conductor
Primary Circuit Terminals
dd'
Note: This table is unofficial and for reference only.
Be sure to confirm the precise values.
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.
Table 2 : Leakage current ratings for selected areas
AC Line Voltage Load Z Leakage Current (i)
110 to 240 V
2kΩ RES.
Connected in
parallel
50kΩ RES.
Connected in
parallel
i≤0.7mA AC Peak
i≤2mA DC
i≤0.7mA AC Peak
i≤2mA DC
Exposed Accessible Part
Z
One side of
B
Power Cord Plug Prongs
One side of power cord plug
prongs (B) to:
RF or
Antenna terminals
A/V Input, Output
AC Voltmeter
(High Impedance)
Fig. 1
Fig. 2
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
U21_PAL 1-2-2 SFTY_06
STANDARD NOTES FOR SERVICING
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Circuit Board Indicati ons
a.The output pin of the 3 pin Regulator ICs is indicated
as shown.
Top View
Out
b.For other ICs, pin 1 and every fifth pin are indicated
as shown.
Input
In
Pin 1
c.The 1st pin of every male connector is indicated as
shown.
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 ma-
chine, 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 tweez-
ers. (Fig. S-1-6)
Pin 1
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 U21_NOTE
With Soldering Iron:
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(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)
Flat Pack-IC
Desoldering Braid
Soldering Iron
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 machine.
(Fig. S-1-4)
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 tweez-
ers. (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.
Hot Air Blower
or
Iron Wire
Soldering Iron
Sharp
Pin
Fine Tip
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)
(4)Release the flat pack-IC from the CBA using tweez-
ers. (Fig. S-1-6)
With Iron Wire:
(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)
(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.
(4) Bottom of the flat pack -IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
To Solid
Mounting Point
CBA
Tweezers
Fig. S-1-5
Fine Tip
Soldeing Iron
Flat Pack-IC
Fig. S-1-6
1-3-2 U21_NOTE
2. Installation
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(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 " ● " 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
pre- solder 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 :
Pin 1 of the Flat Pack-IC
is indicated by a " ● " mark.
Fig. S-1-7
Instructions for Handling
Semiconductors
Electrostatic breakdown of the semiconductors 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 semiconductors are to be placed.
Because the static electricity charge on clothing will not
escape through the body grounding band, be careful to
avoid contacting semiconductors with your clothing.
< Incorrect >
CBA
Presolder
Flat Pack-IC
CBA
< Correct >
Grounding Band
Fig. S-1-8
1MΩ
CBA
1MΩ
Conductive Sheet or
Copper Plate
1-3-3 U21_NOTE
Function Indicator Symbols
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Note:
The following symbols will appear on the indicator panel to indicate the cur rent mode or operation of the VCR.
On-Screen modes will also be momentarily displayed on the TV screen when you press the operation buttons.
Display panel
" H "= LED Light on, " L "= LED Light off
STANDBY
SPEED STANDBY ON CST.IN TIMER REC
LED MODE INDICATOR ACTIVE
STANDBY Standby on = " H "
Standby off = " L "
CST. IN Tape in = " H "
Tape out = " L "
1. When Reel and Capstan Mechanism
Tape in Blinks at 0.8Hz interval
is Not Functioning Correctly
2. When Tape Loading Mechanism is Not
Tape in Blinks at 1.6Hz interval
Functioning Correctly
3. When Cassette Loading Mechanism is
Tape in Blinks at 3.2Hz interval
Not Functioning Correctly
4. When the Drum is Not working
Tape in Blinks at 6.4Hz interval
properly
TIMER Timer stand by = " H "
One touch recording = " H "
Timer recording = " H "
General mode = " L "
REC REC mode = " H "
REC pause
General mode = " L "
Blinks at 0.8Hz interval
CHANNEL
1-4-1 H67T0FIS
PREPARATION FOR SERVICING
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How to Use U21 Deck Extension
Cable
(1) Remove the Deck Mechanism Assembly. If
needed, remove the Main CBA from the chassis.
Refer to "Cabinet Disassembly Instructions" on
page 1-8-1 of Section 1A.
(2) Connect Main CBA and Deck with the U21 Deck
Extension Cable (A) as shown in Fig. 1. And connect Main CBA and Deck with U21 Deck Extension Cable (B) as shown in Fig. 1. Connect a clip
on U21 Deck Extension Cable (B) to J266 on
Main CBA.
(U21 Deck Extension Cable: 9965 000 05217)
(3) Set SW507(LD-SW) on the Main CBA to Service
position as shown in Fig. 1.
Deck
Note 1: There are 3 types of U21 Deck Extension Cable
(A). They are for 2 Head, 4 Head, and Hi-Fi. Use a
connector indicated as shown. Be careful not to let the
unused connector contact other parts.
Note 2: Some noise will be present in the playback
picture when the extension cable is used.
Note 3: Before installing the Deck Assembly , be sure to
align two triangle marks of SW1001 on U21 Deck Extension Cable (B). Then, install the Deck Assembly while
aligning the hole of Cam Gear with the pin of SW1001,
the shaft of Cam Gear with the hole of SW1001 as
shown in Fig. 2.
U21 Deck Extension Cable
Service Part No.
9965 000 05217
U21 Deck
Extension Cable (A)
CN1008 (for 2 Head)
CN1004
CN1003
CN1002
CN1001
SW1001
CN501
Shield
CN251
U21 Deck
Extension Cable (B)
S
Rotate
SW507
CN502
CN504
CN503
J266
Main CBA
SW507
1-5-1 H67T0PFS
Fig. 1
Triangle Marks
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About REC-Safety Switch
Caution:
The REC-Safety Switch is directly mounted on the Main
CBA. When the Deck Mechanism Assembly is removed
from the Main CBA for servicing, this switch does not
work automatically.
SW1001
U21 Deck Extension Cable
Deck Assembly
Cam Gear
Shaft
Hole
SW1001
Hole
Pin
U21 Deck Extension Cable
Fig. 2
How to Enter the Service Mode
Note: When the unit is set in the service mode, the
display will keep blinking.
About Optical Sensors
What to do for preparation
In order to record, press the Rec button while pushing
REC-SAFETY SW on the Main CBA. See Fig. 3.
CN251
CN501
Q503
SW506
(REC-SAFETY SW)
CN504
J267
GND
CN502
CN503
Q504
TP502
S-INH
Fig. 3
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 PLA Y button. The tape will be loaded into the
Deck Mechanism Assembly. Make sure the power is
on, connect TP502 (SENSOR INHIBITION) to TP501
(GROUND). 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. 3.
Note: Because the Tape E nd Sensors are inactive, do
not run a tape all the way to the start or the end of the
tape to avoid tape damage.
1-5-2 H67T0PFS
OPERATING CONTROLS AND FUNCTIONS
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FRONT VIEW
STANDBY
SPEED STANDBY ON CST.IN TIMER REC
87 1213 14
910 11
REMOTE CONTROL VIEW
EJECTSTANDBY
12
13
15
7
VCR
4
TV
PLAY
FFREW
3
2
MENU
SPEED
STOP
ALT.CH
STILL/PAUSE
CLEAR
CH
VOL
STATUS/EXIT
213
546
879
0
2
21
5
20
11
19
18
8
14
MEMORYREC/OTR
MUTE
6
17
16
1.Cassette Compartment
2.STOP button– Press to stop the tape motion.
EJECT button–Press to remove a tape from the
VCR.
▼ button–Press to select setting modes from on
screen menu.
Search [-] function–Press to search down TV
channel in the Fine Tuning mode.
3.REW button–Press to rewind the tape, or to view
the picture rapidly in reverse during the playback
mode. (Rewind Search)
s
button–Press to return to a previous on screen
menu.
1
CHANNEL
3 5 62 4
STOP/EJECT PLAY
PAUSE
REW
MENU STATUS
EXIT
FF
REC/OTR
4.PLAY button–Press to begin playback.
▲ button–Press to select setting modes from on
screen menu.
Search [+] function–Press to search up TV chan-
nel in the Fine Tuning mode.
5.FF button–Press to rapidly advance the tape, or
view the picture rapidly in forward during playback.
(Forward Search)
B
button–Press to determine setting modes from
on screen menu.
6.STILL/PAUSE button–Press to temporarily stop
the tape during recording or to view a still picture
during playback.
7.STANDBY button–Press to turn VCR on and off.
Press to activate a timer recording. If you have a
PHILIPS TV, press to turn your PHILIPS TV power
on and off.
8.SPEED button–Press to set desired recording
speed.
System Change Function (VR109/55 only)–Press
to change the VCR system for matching recorded
system (PAL or MESECAM) during playback. (only
on the VCR)
9.Remote sensor window–Receives the infrared
signals from the remote control.
10.Indicator
STANDBY indicator–Indicates that the VCR is
plugged in.
ON indicator–Indicates that the power is turned on.
CST. IN indicator–Indicates that there is a tape in
the VCR.
TIMER indicator–Indicates that a timer recording or
OTR has been set.
REC indicator–Indicates that a recording is occur-
ring. It flashes when a recording has been paused.
1-6-1 H67T0IB
REAR VIEW
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22 23 24 25
11.CH(annel) buttons–Press to select desired channels for viewing or recording at the VCR. If you have
a PHILIPS TV, press to scan up or down through
your PHILIPS TV channels.
Trackin g funct ion–Press to minimise video ‘noise’
(lines or dots on screen) during playback. (only on
the VCR)
Press to stabilize the picture in the Still mode when
the picture begins to vibrate vertically.
12.MENU button–Press and hold for 3 seconds during
power off to display the RF OUT CH setting menu.
Press to change the background to solid blue or the
weak signal in the Manual Tuning mode or the
Channel Change mode.
Press to display menu on the TV screen.
13.STATUS/EXIT button–Press to display the counter
or the current channel number and current time on
the TV screen. Press to exit the on-screen menu.
14.REC button–Press to begin manual recording.
OTR butt on–Press to activate One Touch Record-
ing.
15.NUMBER buttons–Press to enter digi ts when setting programme (for example: setting clock or timer
programme). Press to select desired channels for
viewing or recording. To select channel, see "How
to use number buttons".
16.MEMORY button–Press to set counter memory on
and off.
17.MUTE button–If you have a PHILIPS TV, press to
mute your PHILIPS TV’s sound. Press it again to
resume the sound.
18.VOL(ume) buttons–If you have a PHILIPS TV,
press to increase or decrease your PHILIPS TV’s
volume.
19. ALT.CH button–If you have a PHILIPS TV, press to
return to the previously viewed channel.
AUDIO
OUT
VIDEO
AERIAL
RF OUT
IN
26 27 28
20.C LEAR bu tton–Press to reset counter to 0:00:00.
Press to cancel a setting of timer programme. Press
to correct digits when setting programme (for example: setting clock or timer programme).
21.Mode Select buttons
VCR button–Press to operate the VCR.
TV button–If you have a PHILIPS TV, press to
operate your PHILIPS TV.
22.Power cord–
Connect to a standard AC outlet (110-240V,
50/60Hz) (VR109/55 only).
Connect to a standard AC outlet (240V, 50Hz)
(VR109/75 only).
23.AUDIO OUT jack–Connect to the audio input jack
of your audio equipment or another VCR.
24.AUDIO IN jack–Connect to the audio output jack of
your audio equipment or another VCR.
25.AERIAL terminal–Connect to a VHF/UHF aerial or
CA TV.
26.VIDE O OUT jack–Connect to a vi deo input jack of
your video camera or another VCR.
27.VIDE O IN jack–Connect to a video output jack of
your video camera or another VCR.
28.RF OUT terminal–Connect to an aerial terminal of
your TV .
1-6-2 H67T0IB
SIGNAL NAME ABBREVI ATIONS
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Signal Name Description
A-COM Audio Head Common
A-MUTE Audio Mute Control Signal
A-PB/REC Normal Audio Play Back/Record
Signal
AE-H Audio Erase Head
AFC Auto Frequency Control Signal
AL+12V Always +12V with AC Plug
Connected
AL+44V Always +44V with AC Plug
Connected
AL+5V Always +5V with AC Plug
Connected
AL-28V Always -28V with AC Plug
Connected
a~j Display Segment Output
CHARACTER OSD Character Signal
C-CONT Capstan Motor Control Signal
C-DRIVE Capstan Motor Driver Signal
C-F/R Capstan Motor Forward/Reverse
C-FG Speed Data of Capstan Motor
C-ROTA Color Phase Rotary Switching
Signal
C-SYNC Composite Synchronized Pulse
V-Sync+H-Sync
CM GND Ground for Capstan Motor
CTL(+) Capstan Motor Control Pulse
CTL(-) Capstan Motor Control Pulse
D-COM Drum Motor Common
D-CONT Drum Control Signal
D-FG Drum Motor Speed Data
D-PG Drum Motor Angle Position Detect
D-REC-H Delayed Record Control
D-U Drum Motor Control Signal
D-V Drum Motor Control Signal
D-V SYNC Dummy Vert ica l Synchronized
Pulse
D-W Drum Motor Control Signal
END-S Tape End Position Detect Signal
FE-H Full Erase Head
FE-H GND Ground for F ull Erase Head
FG GND Ground for C-FG
F1, F2 Filament Voltage 1,2
GND Ground (DC 0V)
Signal Name Description
G1~G4 Grid Control Output 1~4
H-SYNC Horizontal Synchronized Pulse
KEY -1 Key Scan Input Signal 1
KEY -2 Key Scan Input Signal 2
I2C-BUS-DA TA Serial Data for Tuner
I2C-BUS-CLK Serial Clock for Tuner
LD-M(+) Loading Motor Forward Drive
LD-M(-) Loading Motor Reverse Drive
LD-SW Deck Mode Position Detector
LM-FWD Loading Motor Forward
LM-REV Loading Motor Reverse
LINE-IN Line Audio In Rear
LINE-IN-F Line Audio In Front
LINE-OUT Line Audio Out
MOD-A Modulator Audio Output Signal
MOD-V Modulator Video Output Signal
OSD-
BLUEBACK
P-DOWN-L Power Voltage Down Detector
P-ON+5V +5V at Power-On Signal
P-ON+9V +9V at Power-On Signal
P-ON-L Power-On Low Signal
PB-CTL Playback Control Signal
PG(+) PG Sensor Signal (+)
PG(-) PG Sensor Signal (-)
REC-CTL(+) Record Control Signal(+)
REC-CTL(-) Record Control Signal(-)
REC-SAF-SW Rec Safety SW Detect
REMOCON Remote Control Signal
RESET System Reset Signal
RF-SW Head Switching Pulse
ST-S Tape Start Position Detect Signal
T-REEL Take-Up Reel Sensor
TIMER+5V +5V at Timer
TU-AUDIO Tuner Audio Input Signal
TU-VIDEO Tuner Video Input Signal
TV/VCR TV/VCR Control
V(L) Video Head (L)
V(R) Video Head (R)
Switch
OSD Blueback Signal
1-7-1 H67T0SNA
Signal Name Description
06/28/2012
World of Free Manuals
V-COM Video Head Common
V-ENV Video Envelope Signal
V-IN Line Video In Rear
V-IN-F Line Video In Front
V-MUTE Video Mute Signal
V-OUT Video Output Signal
YCA/
Hi-Fi-DATA
YCA/
Hi-Fi-CLK
YCA/
Hi-Fi-CS-L
3.58MHZ 3.58MHZ Clock Signal
Video/Audio/Hi-Fi Serial Data
Video/Audio/Hi-Fi Serial Clock
Video/Audio/Hi-Fi Chip Select-Low
1-7-2 H67T0SNA
CABINET DISASSEMBLY INSTRUCTIONS
06/28/2012
World of Free Manuals
1. Disassembl y Flowchart
This flowchart indicates the disassembly steps to gain
access to item(s) to be serviced. When reassembling,
follow the steps in reverse or der. Bend, route, and dress
the cables as they were originally.
[1] Top Case
[2] Front Assembly
[3] Function CBA [4] Deck Assembly
[5] Main CBA
Disassembly Method
REMOVAL
ID/
LOC.
No.
[1] Top Case 1 3(S-1) [2]
[3]
[4]
[5] Main CBA 5 3(S-3), *3(L-4) 3
↓
➀
PART
Front
Assembly
Function
CBA
Deck
Assembly
↓
➁
REMOVE/
Fig.
*UNHOOK/UNLOCK/
No.
RELEASE/UNPLUG/
DESOLDER
2 *3(L-1), *4(L-2)
2, 3 *(L-3), *(CN505)
4 5(S-2), *(CN251,
CN501, CN502,
CN503, CN504)
↓
➂
↓
➃
Note
-
1
2, 4
↓
➄
Reference Notes
CAUTION: Locking T abs (L-1) and (L-2) are fragile. Be
careful not to break them.
1. Disconnect Connector (CN505) to remove Function
CBA. Hold Main CBA while pulling up on the Function CBA. (Fig. 3)
2. Remove five Screws (S-2). Then slowly lift the Deck
Assembly up. Lifting Deck Assembly disconnects
five Connectors (CN251, CN501, CN502, CN503,
CN504). (Fig. 4)
3. When reassembling the unit, always reinsert three
Locking Tabs (L-4), and then reinstall two Screws
(S-3). These screws are c ritical for proper shielding
of the Main CBA. (Fig. 5)
4. Before installing the Deck Assembly, be sure to align
two triangle marks of LD-SW on Main CBA. 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. 6.
(S-1)
[1]Top Case
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, un-
locked, 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."
Fig. 1
1-8-1 H67T0DC
(L-2)
06/28/2012
World of Free Manuals
(S-3)
(L-2)
[3]Function C.B.A.
(L-1)
(L-3)
Lift PCB up and
over tab
[3] Function CBA
[5] Main CBA
(S-2)
[2]Front Assembly
CN505
(S-2)
Fig. 2
Fig. 3
(L-4)
[5]Main C.B.A.
(L-4)
Fig. 5
CN501
[4]Deck Assembly
CN251
CN504
CN502
CN503
Fig. 4
Triangle Marks
[4]Deck Assembly
Shaft
Hole
LD-SW
Cam Gear
Hole
Pin
SW507
LD-SW
[5]Main C.B.A.
[5]Main C.B.A.
Fig. 6
1-8-2 H67T0DC
ELECTRICAL ADJUSTMENT INSTRUCTIONS
06/28/2012
World of Free Manuals
General Note: "CBA" is an abbreviation for "Circuit
Board Assembly".
Notes:
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 unle ss 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 "▼" or "▲"
button first, then the " PLAY " button (VCR’s Front
Panel only).
Test Equipment Required
1.Oscilloscope: Dual-trace with 10:1 probe, V-Range:
0.001~50V/Div., F-F range: AC~DC-20MHz
2.Alignment Tape ( 4822 395 10283 )
1. Head Switching Posi t i on
Adjustment
Purpose: To determine the Head Switching point dur-
ing playback.
Symptom of Misadjustment: May cause Head
Switching noise or vertical jitter in the picture.
Test Point Adj. Point Mode Input
TP751(V-OUT)
TP302(RF-SW)
GND
Tape
4822 395 10283 Oscilloscope
Connections of Measurement Equipment
Main CBA
VR501 (SW-P)
Measurement
Equipment
TP751
GND
PLAY
(SP)
6.5H±1H
(412.7±60µs)
Oscilloscope
CH1 CH2
----
Spec.
TP302
Figure 1
EXT. Synchronize Trigger Point
CH1
6.5H
CH2
Switching Pulse
Reference Note:
TP302, TP751, VR501 : Main CBA
• Play back the test tape and adjust VR501 so that the
V-sync front edge of the CH1 video output waveform is at the 6.5H(412.7µs) delayed position from
the rising edge of the CH2 head switching pulse
waveform.
Trig. (+)
V-Sync
0.5H1.0H
1-9-1 H67T0EA
Adjustment Points and Test Points
06/28/2012
World of Free Manuals
Main CBA Top View
TUNER
BLOCK
TP751
V-OUT
OSD
BLOCK
TP752
A-OUT
TP301
C-PB
VIDEO
BLOCK
VR501 SW-P
TP302
RF-SW
SYSCON/TIMER
SERVO BLOCK
TEST POINT INFORMATION
: Indicates a test point with a jumper wire across a hole in the PCB.
H-AMP
BLOCK
AUDIO
BLOCK
J267
GND
POWER
SUPPLY
BLOCK
POWER
CTL
BLOCK
TP303
CTL
TP502
SENS-INH
TEST POINTS NOT USED IN ELECTRICAL ADJUSTMENTS
Test Point
TP301
TP302
TP303
J267
TP502
Mechanical Alignment Procedures
Mechanical Alignment Procedures
Mechanical Alignment Procedures
Preparation for Servicing
Preparation for Servicing
Used in: Page No.
Main CBA
Audio Out
Audio In
Video Out
Video In
Tuner Unit
Antenna In
Antenna Out
2-3-3, 2-3-4
2-3-3, 2-3-4
2-3-3
1-5-1
1-5-2
1-9-2 H67T0AP
Servo/System Control Block Diagram BLOCK DIAGRAMS
06/28/2012
World of Free Manuals
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.)
" " = SMD
(DECK ASSEMBLY)
AC HEAD ASSEMBLY
CONTROL
HEAD
CYLINDER ASSEMBLY
DRUM
MOTOR
LOADING MOTOR ASSEMBLY
LOADING
MOTOR
CAPSTAN MOTOR
CAPSTAN
MOTOR
M
PG
SENSOR
M
M
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.
CN287
5 8CTL(+)
6 9CTL(-)
1 1D-U
2 2D-V
3 3D-W
4 4D-COM
5 5GND
6 6PG(+)
7 7PG(-)
C-FG
NU
FG-GND
CM-GND
CN504
CN502
CN504
1LD-M(+)
2LD-M(-)
CN503
1C-F/R
2P-ON+5V
3AL+12V
4
5
6C-DRIVE
7
8
MAIN CBA
P-ON+5V
AL+12V
10
9
16
17
18
19
6
15
13
(1/3)
IC503
+
8
-
TP303
CTL
IC611
(DRUM /LOADING MOTOR DRIVE)
DRUM
MOTOR
DRIVE
4
5
+
-
DRIVE
TP506 TP507
ST-S
Q504
ST-S
+
-
LOADING
MOTOR
CONTROL
END-S
Q503
END-S
13
12
PS501
AL+5V
D551
S-LED
+
-
2
8
7
12
11
TP505
T-REEL
T-REEL
TIMER+5V
14
1
7
SW507
LD-SW
IC503
IC503
RESET
AL+5V
RS501
REMOTE
SENSOR
(2/3)
3
(3/3)
5
Q505
VR501
SW-POINT
AL+5V
AL+5V
IC501
(SERVO/SYSTEM CONTROL)
REMOCON
85
REC-CTL(+)
2
REC-CTL(-)
3
PB-CTL
37
LD-SW26
D-CONT51
D-FG
44
D-PG
38
LM-REV
49
LM-FWD
48
C-CONT
50
25
ST-S
24
END-S
T-REEL
34
40
RESET
10
C-F/R
45
C-FG
C-DRIVE
5
PG-DELAY
32
/TEST
KEY-1
KEY-2
REC LED
CAS. LED
TIMER LED 63
TIMER LED 73
BUS SCL-2
BUS SDA-2
A-MUTE-H
D-REC-H
OSD-CLK
OSD-DATA
OSD-CS-L
BUS SCL
BUS SDA
C-SYNC
D-V SYNC
V-ENV
ROTA
RF-SW
DEC-L
KEY
31
SWITCH
27
TP501
GND
62
64
9
8
1
19
81
80
79
92
91
Q508 Q506
36
17
23
12
13
83
TP502
S-INH
AL+5V
P-ON+12V
CN505 CN651
KEY-1
4 4
2 2KEY-2
D510 STANDBY
D511 POWER
D514 REC
D512 CASS
D513 TIMER
IC505
(MEMORY)
6
SCL
5
SDA
TU701
SCL
5
SCL
11
12
SDA
3
SDA
A-MUTE-H
D-REC-H
BUS SCL
BUS SDA
OSD-CLK
OSD-DATA
OSD-CS-L
BUS SCL
BUS SDA
C-SYNC
D-V SYNC
V-ENV
ROTA
RF-SW
BUS SDA
BUS SCL
DEC-L
FUNCTION CBA
KEY SWITCH
KEY SWITCH
TO AUDIO
BLOCK
TO VIDEO
BLOCK
TO JACK
BLOCK
1-10-1 1-10-2 H67T0BLS
Video Block Diagram
06/28/2012
World of Free Manuals
" " = SMD
TP751
V-OUT
JK751
V-OUT
JK752
V-IN
TU701
VIDEO
TU-VIDEO
6
24
WF1
Q305
BUFFER
TO SERVO
/SYSTEM
CONTROL
BLOCK
38
36
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.)
IC851
(OSD)
OSD
/CHARACTER
MAIN CBA
MIC
18
1513
11109
IC301
(Y/C PROCESS)
OSD-CS-L
OSD-CLK
OSD-DATA
D-V SYNC
C-SYNC
ROTA
LINE
32
TUNER
26
28
10
31
C-SYNC
ROTA
EE
AGC
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.
X302
4.43MHz
VXO
AMP
CHARA
INS.
FBC
R P
Y/C
MIX
R
1/2
P
NOISE
CANCEL
PIC-CTL
ANR
Y-LPF
DE EMPA
REC-Y SIGNAL REC-C SIGNAL PB-Y SIGNAL PB-C SIGNAL MODE: SP/REC
Q307
BUFFER
Q304
BUFFER
BUS SDA
BUS SCL
TO
SERVO/SYSTEM
CONTROL BLOCK
43
M
45
CCD 1H
DELAY
DOC YNR Y/C COMB
46 41
CLAMP
CLAMP
DETAIL
ENH
21 24 232029 67 66 49
R P
SERIAL
DECORDER
V/I
CONV
SUB
LPF
FM
DEMOD.
DOUBLE
LIMIT
17
Q302, Q303
W/D
CLIP
FM
MOD
REC
FM-EQ
NL
EMPHA
PEAKING
AMP
19
(DECK ASSEMBLY)
CYLINDER ASSEMBLY
VIDEO (L) HEAD
VIDEO (R) HEAD
1
2
3
CN251
V(L)
V-COM
V(R)
R P
BPF
D.E.
P
R
KIL
C-COMB COMB
AMP
72715759 54 52 51 61
91
90
89
88
BPF
MAPBPF
KILL
B.D.
CCD
LPF
R
P
ACC
4.43MHz
B-UP
AMP
CONV
SUB
CONV
MAIN
R
C-LPF
P
629KHz
L
R
ENV DET
REC FM
AGC
PB FM
AGC
PB
FM-EQ
93 V-ENV
11
TP302
RF-SW
R
P
RF-SW
18
TO
SERVO/SYSTEM
CONTROL BLOCK
WF2
74
TP301
C-PB
WF5
1-10-3 1-10-4 H67T0BLV
Audio Block Diagram
06/28/2012
World of Free Manuals
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.)
" " = SMD
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.
PB-AUDIO SIGNAL REC-AUDIO SIGNAL Mode : SP/REC
A-OUT
A-IN
JK751
JK752
TU701
TU-AUDIO
AUDIO
21
TP752
A-OUT
2
4
3
MAIN CBA
IC301
(AUDIO PROCESS) 76
PB-ON
EQ
AMP
1
98
ALC
R
100
P
LINETUNER
LINE
AMP
MUTE
96
(DECK ASSEMBLY)
ACE HEAD ASSEMBLY
AUDIO
HEAD
AUDIO
ERASE
HEAD
FE HEAD
FULL
ERASE
HEAD
CN287
A-PB/REC 4
A-COM 3
AE-H 1
AE-H/FE-H 2
CN504
7 A-PB/REC
6 A-COM
4 AE-H
5 FE-H
CN501
1 FE-H
2 FE-H-GND
Q402
BIAS
OSC
P-ON+5V
Q404 (PB=ON)
Q403
Q405
(PB=ON)
Q401
SWITCHING
D-REC-OFF
P-ON+5V
99
SP/LP-ON
AUTO
BIAS
2
6
7
REC
AMP
10
SERIAL
DECODER
23 24
98
BUS SDA
BUS SCL
A-MUTE-H
D-REC-H
TO SERVO/SYSTEM
CONTROL BLOCK
1-10-5 1-10-6 H67T0BLA
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