Luxor LUX204VR User manual

SERVICEMANUAL
VIDEO CASSETTE RECORDER
Sec. 1: Main Section
ISpecifications
IPreparation for Servicing
IAdjustment Procedures
ISchematic Diagrams
ICBA’s
Sec. 2: Deck Mechanism Section
IStandard Maintenance
IAlignment for Mechanism
IDisassembly/Assembly of Mechanism
IAlignment Procedures of Mechanism
Sec. 3: Exploded views
and Parts List Section
IExploded views
IParts List
LUX204VR
PAL

MAIN SECTION
VIDEO CASSETTE RECORDER
LUX204VR
TABLE OF CONTENTS
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1-1
Important Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2-1
Standard Notes for Servicing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3-1
Preparation for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4-1
Cabinet Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5-1
Electrical Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6-1
Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7-1
Function Indicator Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7-11
Schematic Diagrams / CBA’s and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8-1
Waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9-1
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10-1
IC Pin Function Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11-1
Lead Identifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12-1
Sec. 1: Main Section
ISpecifications
IPreparation for Servicing
IAdjustment Procedures
ISchematic Diagrams
ICBA’s

1-1-1 HE450SP
SPECIFICATIONS
Note: Nominal specs represent the design specs. All units should be able to approximate these – some will exceed
and some may drop slightly below these specs. Limit specs represent the absolute worst condition that still might
be considered acceptable; In no case should a unit fail to meet limit specs.
Description Unit Minimum Nominal Maximum Remark
1. Video
1-1. Video Output (PB) Vp-p 0.8 1.0 1.2 FL6A
1-2. Video Output (R/P) Vp-p 0.8 1.0 1.2
1-3. Video S/N Y (R/P) dB 40 45 SP Mode,
W/O Burst
1-4. Video Color S/N AM (R/P) dB 37 41 SP Mode
1-5. Video Color S/N PM (R/P) dB 30 36 SP Mode
1-6. Resolution (PB) Line 230 245 SP Mode
2. Servo
2-1. Jitter Low µsec 0.07 0.12 SP Mode
2-2. Wow & Flutter % 0.3 0.5 SP Mode
3. Normal Audio
3-1. Output (PB) dBV -9 -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 -7 -4 SP Mode
(-20dB ref. 1kHz) at 6kHz dB -10 -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
5. Hi-Fi Audio
5-1. Output dBV -12 -8 -4 SP Mode
5-2. Dynamic Range dB 70 85 SP Mode
5-3. Freq. resp (6dB B.W) Hz 20 ~ 20K SP Mode

1-2-1 H8740SFP
IMPORTANT SAFETY PRECAUTIONS
Product Safety Notice
Some electrical and mechanical parts have special
safety-related characteristics which are often not evi-
dent 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 iden-
tified by a !on schematics and in parts lists. Use of a
substitute replacement that does not have the same
safety characteristics as the recommended replace-
ment part might create shock, fire, and/or other haz-
ards. The Product’s Safety is under review
continuously and new instructions are issued when-
ever 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 impor-
tant 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 block-
ing capacitors, and noise blocking filters, etc.
C. Use specified internal wiring. Note especially:
1)Wires covered with PVC tubing
2)Double insulated wires
3)High voltage leads
D. Use specified insulating materials for hazardous
live parts. Note especially:
1)Insulation tape
2)PVC tubing
3)Spacers
4)Insulators for transistors
E. When replacing AC primary side components
(transformers, power cord, etc.), wrap ends of
wires securely about the terminals before solder-
ing.
F. Observe that the wires do not contact heat produc-
ing parts (heatsinks, oxide metal film resistors, fus-
ible resistors, etc.).
G. Check that replaced wires do not contact sharp
edges or pointed parts.
H. When a power cord has been replaced, check that
5 - 6 kg of force in any direction will not loosen it.
I. Also check areas surrounding repaired locations.
J. Be careful that foreign objects (screws, solder
droplets, etc.) do not remain inside the set.
K. Crimp type wire connector
The power 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 clo-
sure of the tool.
L. When connecting or disconnecting the internal
connectors, first, disconnect the AC plug from the
AC outlet.

1-2-2 H8740SFP
Safety Check after Servicing
Examine the area surrounding the repaired location for
damage or deterioration. Observe that screws, parts,
and wires have been returned to their original posi-
tions. 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 sol-
dered terminals, and between terminals and surround-
ing metallic parts. (See Fig. 1)
Table 1 : Ratings for selected area
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 termi-
nals, 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.
AC Line Voltage Clearance Distance (d) (d’)
230 - 240 V ≥3mm(d)
≥6 mm(d’)
Chassis or Secondary Conductor
dd'
Primary Circuit Terminals
Fig. 1
AC Voltmeter
(High Impedance)
Exposed Accessible Part
BOne side of
Power Cord Plug Prongs
Z
Fig. 2
Table 2: Leakage current ratings for selected areas
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
AC Line Voltage Load Z Leakage Current (i) One side of power cord plug
prongs (B) to:
230 - 240 V
2kΩ RES.
Connected in
parallel i≤0.7mA AC Peak
i≤2mA DC RF or Antenna terminals
50kΩRES.
Connected in
parallel i≤0.7mA AC Peak
i≤2mA DC A/V Input, Output

1-3-1 NOTE_1
STANDARD NOTES FOR SERVICING
Circuit Board Indications
a. The output pin of the 3 pin Regulator ICs is indi-
cated as shown.
b. For other ICs, pin 1 and every fifth pin are indicated
as shown.
c. The 1st pin of every male connector is indicated as
shown.
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.
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)
(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)
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.
Top View
Out In
Bottom View
Input
5
10
Pin 1
Pin 1
FFC Cable
Connector
CBA
* Be careful to avoid a short circuit.
Fig. S-1-1
Hot-air
Flat Pack-IC
Desoldering
Machine
CBA
Flat Pack-IC
Tweezers
Masking
Tape
Fig. S-1-2

1-3-2 NOTE_1
With Soldering Iron:
(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)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)
(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)
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
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.
Flat Pack-IC Desoldering Braid
Soldering Iron
Fig. S-1-3
Fine Tip
Soldering Iron
Sharp
Pin
Fig. S-1-4
To Solid
Mounting Point
Soldering Iron
Iron Wire
or
Hot Air Blower
Fig. S-1-5
Fine Tip
Soldering Iron
CBA
Flat Pack-IC
Tweezers
Fig. S-1-6

1-3-3 NOTE_1
2. Installation
(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.
Instructions for Handling
Semi-conductors
Electrostatic breakdown of the semi-conductors may
occur due to a potential difference caused by electro-
static charge during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a grounding band (1MΩ) that is prop-
erly 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 cloth-
ing will not escape through the body grounding band,
be careful to avoid contacting semi-conductors with
your clothing.
Example :
Pin 1 of the Flat Pack-IC
is indicated by a " " mark.
Fig. S-1-7
Presolder
CBA
Flat Pack-IC
Fig. S-1-8
CBA
< Incorrect >
CBA
Grounding Band
Conductive Sheet or
Copper Plate
1MΩ
1MΩ
< Correct >

1-4-1 HE470PFS
PREPARATION FOR SERVICING
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 TP507 (SENSOR INHIBITION) to GND.
This will stop the function of Tape Start Sensor, Tape
End Sensor and Reel Sensors. (If these TPs are con-
nected 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.
TP507
S-INH
Q504
Q505
Fig. 1

1-5-1 HE450DC
CABINET DISASSEMBLY INSTRUCTIONS
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.
2. Disassembly Method
(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.”
Reference Notes
CAUTION: Locking Tabs (L-1) and (L-2) are fragile.
Be careful not to break them.
1. Remove five Screws (S-2), three Screws (S-3) and
Screw (S-4). Then, slowly lift the VCR Chassis Unit
(Deck Assembly, Jack CBA and Main CBA) up.
2. When reassembling, solder wire jumpers as shown
in Fig. 5.
3. Before installing the Deck Assembly, be sure to
place the pin of LD-SW on Main CBA as shown in
Fig. 6. Then, install the Deck Assembly while align-
ing 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.
ID/
LOC.
No. PART
REMOVAL
Fig.
No.
REMOVE/*UNHOOK/
UNLOCK/RELEASE/
UNPLUG/DESOLDER Note
[1] Top Case 1 7(S-1) -
[2] Front
Assembly 2 *3(L-1),*4(L-2) -
[3] VCR Chassis
Unit 3 5(S-2), 3(S-3), (S-4), 1
[4] Jack CBA 4 Desolder, (S-5) -
[5] Deck
Assembly 5,6 2(S-6), Desolder 2,3
[6] Main CBA 5 *(L-3) -
[7] Cylinder
Shield 52(S-7) -
[8] Jack
Board 5 ---------- -
↓
(1) ↓ (2) ↓ (3) ↓ (4) ↓ (5)
[5] Deck Assembly
[4] Jack CBA
[1] Top Case
[2] Front Assembly
[3] VCR Chassis Unit
[6] Main CBA
[7] Cylinder Shield
[8] Jack Board
(S-1)
(S-1)
(S-1)
[1] Top Case
Fig. 1

1-5-2 HE450DC
(L-2)
(L-1)
[2] Front
Assembly
(L-2)
Fig. 2
(S-2) (S-2)
(S-4)
(S-2)
(S-2)
(S-3)
(S-3)
[3]VCR
Chassis
Unit
(S-3)
Fig. 3
(S-5)
[4] Jack CBA
Desolder
Fig. 4

1-5-3 HE450DC
[6] Main CBA
(S-6)
(S-6)
(S-7)
[5] Deck Assembly
FE Head Cylinder Assembly
AC Head
Assembly
TOPVIEW
From
FE Head
From
Cylinder
Assembly From
AC Head
Assembly
Lead with
blue stripe
Lead with
blue stripe
Desolder
from bottom
Lead with
blue stripe
From
Capstan Motor
Assembly
Lead connections of Deck Assembly and Main CBA
Printing
side
[7] Cylinder Shield
[8] Jack Board
(L-3)
Fig. 5
LD-SW Pin
Hole
Hole
Shaft
Cam Gear
[6] Main CBA
[5] Deck Assembly
[6] Main CBA
SW507
LD-SW
Pin
Fig. 6

1-6-1 HE240EA
ELECTRICAL ADJUSTMENT INSTRUCTIONS
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 com-
pleted. Also, do not attempt these adjustments
unless the proper equipment is available.
2.To perform these alignment / confirmation proce-
dures, make sure that the tracking control is set in
the center position: Press either "L5??" or "K" button
on the remote control unit first, then the "PLAY"
button (Front Panel only).
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.
Reference Notes:
Playback the Alignment tape and adjust VR501 so that
the V-sync front edge of the CH1 video output wave-
form is at the 6.5H(416.0µs) delayed position from the
rising edge of the CH2 head switching pulse wave-
form.
Test point Adj.Point Mode Input
J23(V-OUT)
TP502(RF-SW)
GND
VR501
(Switching Point)
(MAIN CBA) PLAY
(SP) -----
Tape Measurement
Equipment Spec.
FL6A Oscilloscope 6.5H±1H
(416.0µs±60µs)
Connections of Measurement Equipment
Figure 1
Oscilloscope
Main CBA J23
CH1 CH2
Trig. (+)
GND
TP502
EXT. Syncronize Trigger Point
1.0H
CH1
CH2
Switching Pulse
6.5H V-Sync
0.5H

M
M
LOADING
MOTOR
CYLINDER ASSEMBLY CAPSTAN MOTOR
DRUM
MOTOR
PG
SENSOR
CONTROL
HEAD
CL287
5 5CTL(+)
6 6CTL(-)
CL504
AC HEAD ASSEMBLY
MAIN CBA
C-CONT
C-FG
D-PFG
ST-S
T-REEL
C-F/R
REMOCON-IN
CTL(+)
RESET
REC-SAF-SW
PG-DELAY
CTL(-)
D-V-SYNC
D-REC-H
RF-SW
H-A-SW
C-ROTA
END-S
IC561
(FIP DRIVER)
14
90
87
94
95
76
10
4
80
34
78
2
13
15
18
33
16
31
RS501
REMOTE
SENSOR
LM-FWD/REV
81
D-CONT77
(DECK ASSEMBLY)
Servo/System Control Block Diagram
BLOCK DIAGRAMS
T-REEL
Q501
Q562
Q563
Q564
Q565
DRV-DATA
DRV-STB
DRV-CLK
FP561
FIP
RESET
Q503
S-REEL79
SW-POINT
AL+5V
VR501
TIMER+5V
S-REEL
PS503TP505
IIC-BUS SDA
IIC-BUS SDA
IIC-BUS SCL
A-MUTE-H
IIC-BUS SDA
IIC-BUS SCL
Hi-Fi-H-SW
A-MODE
A-MUTE-H
Hi-Fi-H-SW
A-MODE
H-A-COMP
17 V-ENV
6
P-ON-H
C-POW-SW
P-ON-H
C-POW-SW
P-DOWN-L 67
66
P-OFF-H P-OFF-H
73
86 P-DOWN-L
C-SYNC
58
SW506
FROM/TO
VIDEO BLOCK
FROM/TO
Hi-Fi AUDIO
BLOCK
TO
AUDIO BLOCK
1-7-1 1-7-2 HE410BLS
SDA
SDA
SCL
SCL
TU701(TUNER UNIT)
IC503 (MEMORY)
72
32
19
83
IIC-BUS SCL
D-V-SYNC
D-REC-H
RF-SW
H-A-SW
C-ROTA
IIC-BUS SDA
H-A-COMP
V-ENV
C-SYNC
IIC-BUS SCL 71
3
5
SDA
SCL
12
11
CAS-LED
TIMER-LED
REC-LED
G1
G2
G3
G4
G5
G6
S1
S2
S7
S8
S9
S10
26
25
24
POWER-LED 23
D565 REC
D564 TIMER
D563 CAS
D562 POWER
D561 STAND-BY
+5V
LD-SW9
AL+12V/+20.5V
P-ON+15V
AL+5V
AL+5V
SW507
AL+12V
P-ON+5V
LD-SW
AL+5V
D502
S-LED
FROM/TO
POWER
SUPPLY
BLOCK
LINE-MUTE
SENS-INH
CAPSTAN
MOTOR
23
22
21
2
22
1
20
13
14
16
17
19
18
7
8
IC501
(SERVO/SYSTEM CONTROL)
LINE-MUTE 28
5
6
CL502
12 P-ON+15V
11 AL+12V(2)
10 GND
9D-PFG
8D-CONT
7
LM-FWD/REV
6GND
5C-CONT
4C-F/R
3C-FG
2P-ON+5V
1
AL+12V/+20.5V
SENSOR CBA
SENSOR CBA
END-S
ST-S
Q504
Q505
REC-SAFETY
END-S
KEY- 2
KEY- 1
8
7
KEY
SWITCH
KEY
SWITCH
TP507
SW508
RESET Q562
Q563
Q564
Q565
TAPE IN-LED
TIMER-LED
REC-LED 26
25
24
FUNCTION-LED 23
D565 REC
D564 TIMER
D563 TAPE IN
D562 FUNCTION
D561 STANDBY
+5V
M

CYLINDER ASSEMBLY
V(R)-1
V-COM
V(L)-1
CL253
1
2
3
Video Block Diagram
1-7-3 1-7-4 HE410BLV
(DECK ASSEMBLY)
VIDEO (R)-1
HEAD
SP
HEAD
AMP
EP
HEAD
AMP
REC FM
AGC
FROM/TO SERVO/SYSTEM
CONTROL BLOCK
FROM/TO
SERVO/SYSTEM
CONTROL BLOCK
C-SYNC
RF-SW
D-REC-H
C-ROTA
D-V-SYNC
H-A-SW
H-A-COMP
V-ENV
LUMINANCE
SIGNAL
PROCESS
CHROMINANCE
SIGNAL
PROCESS
C-SYNC
V-ENV
H-A-COMP
H-A-SW
D-V-SYNC
C-ROTA/RF-SW
VIDEO (L)-1
HEAD
VIDEO (L)-2
HEAD
VIDEO (R)-2
HEAD
V(L)-2
V-COM
V(R)-2
4
5
6
TU701
IC301
(Y/C SIGNAL PROCESS)
IC501 (OSD)
REC-VIDEO SIGNAL PB-VIDEO SIGNAL MODE: SP/REC
SERIAL
DECORDER
V-OUT1 1
V-IN1
1
3 3
V-OUT2 1
V-IN2 3
1
3
JACK CBA
48
50
52
56
24
6
50
52
19
20
JK101
V-OUT1
V-IN1
19
20
JK102
CL151
CL152
CL101
CL102
V-OUT2
V-IN2
61
63
96
95
93
94
90
89
88
87
CHARA.
INS.
CCD 1H DELAY
SP
BYPASS
MUTE
PB/EE
IN1
TUNER
IN1
TUNER
MUTE
PB/EE
FRT
IN2
FRT
IN2
AGC
PR
R
Y
C
P
R P R P
EP
Y. DELAY
Y/C
MIX
+
21
7978
AGC VXO
OSD
CHARACTER
MIX
FBC
1/2
58 59
65
2928
IIC-BUS SDA
IIC-BUS SCL
69684643
67
84
83
71
62
70
D-REC-H 80
BUFFER
Q101
BUFFER
Q102
TP301
X301
4.433619MHz C-PB
WF2
TU-VIDEO
VIDEO
BUFFER
Q351
MAIN CBA
TP502
RF-SW
WF1
J23
V-OUT
WF3
54
JK756
V-IN
FRONT

Audio Block Diagram
REC
AMP
100 3
AUTO
BIAS
2
1
+5V
+5V
Q401
Q406
BIAS
OSC
Q402
N-A-PB
FROM/TO Hi-Fi
AUDIO BLOCK N-A-REC
Q405
(PB=ON)
Q403
SWITCHING
D-REC-OFF
5EQ
AMP 98
7
LINE
AMP
REC-ON
AUDIO HD-SW
CONTROL
MUTE 11
6
PB-ON
SP/LP-ON
P
TUNER IN2
IN1
R
ALC
DET
ALC
IC301
(AUDIO SIGNAL PROCESS) 1513 17
4 A-PB/REC
CL504
3 A-COM
1 AE-H
2 AE-H/FE-H
A-PB/REC 4
A-COM 3
AE-H 1
AE-H/FE-H 2
CL287
AUDIO
HEAD
AUDIO
ERASE
HEAD
ACE HEAD ASSEMBLY
FE HEAD
2 FE-H
1 FE-H-GND
CL501
1-7-5 1-7-6 HE410BLA
MAIN CBA
PB-AUDIO SIGNAL REC-AUDIO SIGNAL Mode : SP/REC
71
A-MUTE-H
IIC-BUS SCL
IIC-BUS SDA TO SERVO/SYSTEM
CONTROL BLOCK
FULL
ERASE
HEAD
68 69
SERIAL
DECODER
(DECK ASSEMBLY)
12
16
INV
ATT

ENV
DET
LOGIC
R
L
HOLD
PULSE
LIM
OUTPUT
SELECT
Hi-Fi Audio Block Diagram
HE410BLH
REC-AUDIO SIGNALPB-AUDIO SIGNAL Mode : SP/REC
IIC-BUS SDA
IIC-BUS SCL
A-MODE
LINE-MUTE
LINE-MUTE
MUTE-ON
MUTE-ON
Hi-Fi-H-SW
IF SIGNAL
PROCESS
N-A-REC
FROM/TO AUDIO BLOCK N-A-PB
AFV CBA
TU-AUDIO(R)
4
TU-AUDIO(L) 5
4
5
CN701 CN1
SIF 22
CN701
CN1
TU701
AUDIO
SIF
2
22
JACK CBA MAIN CBA
JK101
A-IN1(R)
A-IN1(L)
2
6
2
6
1
3
1
3
JK102
CL151
CL152
CL101
CL102
A-IN2(R)
A-IN2(L)
A-OUT1(R)
A-OUT1(L)
A-OUT2(R)
A-OUT2(L)
A-IN2(R)
(Hi-Fi AUDIO SIGNAL PROCESS)
9
A-IN2(L) 8
9
8
A-OUT2(R) 6
A-OUT2(L) 11
6
11
A-IN1(R) 10
A-IN1(L) 8
10
8
A-OUT1(R) 6
A-OUT1(L) 12
6
12
IC451
1-7-7 1-7-8
Hi-Fi
AUDIO
(R) HEAD
Hi-Fi
AUDIO
(L) HEAD
CYLINDER
ASSEMBLY
Hi-Fi-A(R) 9
Hi-Fi-COM 8
Hi-Fi-A(L) 7
CL253
48
47
14
15
R-CH
INSEL
L-CH
INSEL
ALC
SW
SW
ALC
62
61 71
70
24
26
27
34 33
L-CH
BPF
COMP
SW
NOISE
COMP
SW
NOISE
R-CH
BPF
VCO
LPF
LIM DEV
VCO
LPF
LIM DEV
MIX V/I
NOISE
DET
DO
DET
P
P
R
R
VCO MUTE
73
74
72
76
77
75
37
38
21
53
39
L-CH
PNR
ALC
R-CH
PNR
ALC
67
65
52
56
54
50
60
2
6
10
8
4
78
80
+
FRONT
Q451
FROM/TO SYSTEM
CONTROL BLOCK
JK758
A-IN(R)
JK757
A-IN(L)
JK751
A-OUT
(L)
A-OUT
(R)
SUB JACK CBA
CL509
A-OUT1(L)
2
A-OUT1(R)
1

2
4
16
6
7
Power Supply Block Diagram
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T1.6AL/250V FUSE.
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
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.
HE410BLP1-7-9 1-7-10
COLD
MAIN CBA
HOT CIRCUIT. BE CAREFUL.
HOT
IC001
ERROR
VOLTAGE DET
Q002
Q003
Q001
F001 L003
LINE
FILTER
BRIDGE
RECTIFIER
D001 - D004
1
23
4
Q004
(VOLTAGE DETECTION)
REG
AC001
T001
P-ON+32V
P-ON+15V
12
P-ON-H
(FROM PIN 67 OF IC501)
(FROM PIN 66 OF IC501)
AL+12V/+20.5V
AL+9V
AL+12V
C-POW-SW
AL+5V
TIMER+5V
P-ON+5V
P-DOWN-L
P-OFF-H
Q051
Q053
Q054
Q056
Q052
Q057
Q058
13
15
14
11
17
18
T1.6A L 250V
Q055
Q059
(TO PIN 86 OF IC501)
(TO PIN 73 OF IC501)

1-7-11 HE410FIS
FUNCTION INDICATOR SYMBOLS
Note:
The following symbols will appear on the indicator panel to indicate the current 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
Led Mode Indicator Active
STANDBY Power on = " H "
Power off = " L "
FUNCTION VCR mode = " H "
TV mode = " L "
TAPE IN
1. When reel and capstan mechanism is
not functioning correctly
2. When tape loading mechanism is not
functioning correctly
3. When cassette loading mechanism is
not functioning correctly
4. When the drum is not working properly
Cassette in = " H "
Cassette out = " L "
Cassette in
Cassette in
Cassette in
Cassette in
Blinks at 0.8Hz interval
Blinks at 1.6Hz interval
Blinks at 3.2Hz interval
Blinks at 6.4Hz interval
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
TAPE IN
TIMER
FUNCTION
STANDBY
REC

1-8-1 SCPA1
(Top View) (Bottom View)
(Bottom View)
Electrolytic Capacitor
+
Transistor or Digital Transistor
NPN Transistor PNP Transistor
NPN Digital Transistor PNP Digital
Transistor
(Top View)
(Top View)
E C B
E C B
Digital Transistor
CBA Symbols Schematic Diagram Symbols
E C B
(Top View)
(Top View)
E C B
E C B
SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS
Standard Notes
WARNING
Many electrical and mechanical parts in this chassis
have special characteristics. These characteristics
often pass unnoticed and the protection afforded by
them cannot necessarily be obtained by using replace-
ment components rated for higher voltage, wattage,
etc. Replacement parts that have these special safety
characteristics are identified in this manual and its
supplements; electrical components having such fea-
tures are identified by the mark " !" in the schematic
diagram and the parts list. Before replacing any of
these components, read the parts list in this manual
carefully. The use of substitute replacement parts that
do not have the same safety characteristics as speci-
fied in the parts list may create shock, fire, or other
hazards.
Capacitor Temperature Markings
Notes:
1. Do not use the part number shown on these draw-
ings for ordering. The correct part number is shown
in the parts list, and may be slightly different or
amended since these drawings were prepared.
2. All resistance values are indicated in ohms
(K=103, M=106).
3. Resistor wattages are 1/4W or 1/6W unless other-
wise specified.
4. All capacitance values are indicated in µF
(P=10-6 µF).
5. All voltages are DC voltages unless otherwise
specified.
6. Electrical parts such as capacitors, connectors,
diodes, IC’s, transistors, resistors, switches, and
fuses are identified by four digits. The first two dig-
its are not shown for each component. In each
block of the diagram, there is a note such as shown
below to indicate these abbreviated two digits.
Capacitors and transistors are represented by the following symbols.
Mark Capacity
change rate Standard temperature Temperature range
(B) ±10% 20°C -25~+85°C
(F) +30 - 80% 20°C -25~+85°C
(SR) ±15% 20°C -25~+85°C
(Z) +30 - 80% 20°C -10~+70°C