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SERVICE MANUAL
Sec. 1: Main Section Sec. 2: Deck Mechanism Section
I Specifications I Standard Maintenance
I Preparation for Servicing I Alignment for Mechanism
I Adjustment Procedures I Disassembly/Assembly of Mechanism
I Schematic Diagrams I Alignment Procedures of Mechanism
I CBA's I Deck Exploded Views
I Exploded views I Deck Parts List
I Parts List
VIDEO CASSETTE RECORDER
VR-455
PAL
MAIN SECTION
VIDEO CASSETTE RECORDER
VR-455
Sec. 1: Main Section
I Specifications
I Preparation for Servicing
I Adjustment Procedures
I Schematic Diagrams
I CBA's
I Exploded Views
I Parts List
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-5
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
Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13-1
Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14-1
Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15-1
SPECIFICATIONS
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
SP Mode,
1-3. Video S/N Y (R/P) dB 40 45
W/O Burst
1-4. Video Color S/N AM (R/P) dB 37 41 SP Mode
1-5. Video Color S/N PM (R/P) dB 30 36 SP Mode
1-6. Resolution (PB) Line 230 245 SP Mode
2. Servo
2-1. Jitter Low µsec 0.07 0.12 SP Mode
2-2. Wow & Flutter % 0.3 0.5 SP Mode
3. Normal Audio
3-1. Output (PB) dBV -9 -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
Note: Nominal specs represent the design specs. All units should be able to approximate these some will exceed
and some may drop slightly below these specs. Limit specs represent the absolute worst condition that still might
be considered acceptable; In no case should a unit fail to meet limit specs.
1-1-1 HG240SP
IMPORTANT SAFETY PRECAUTIONS
Product Safety Notice J. Be careful that foreign objects (screws, solder
droplets, etc.) do not remain inside the set.
Some electrical and mechanical parts have special
K. Crimp type wire connector
safety-related characteristics which are often not evi-
The power transformer uses crimp type connectors
dent from visual inspection, nor can the protection they
which connect the power cord and the primary side
give necessarily be obtained by replacing them with
of the transformer. When replacing the transformer,
components rated for higher voltage, wattage, etc.
follow these steps carefully and precisely to prevent
Parts that have special safety characteristics are iden-
shock hazards.
tified by a ! on schematics and in parts lists. Use of a
Replacement procedure
substitute replacement that does not have the same
safety characteristics as the recommended replace- 1)Remove the old connector by cutting the wires at a
ment part might create shock, fire, and/or other haz- point close to the connector.
ards. The Product's Safety is under review Important: Do not re-use a connector. (Discard it.)
continuously and new instructions are issued when- 2)Strip about 15 mm of the insulation from the ends
ever appropriate. Prior to shipment from the factory, of the wires. If the wires are stranded, twist the
our products are carefully inspected to confirm with strands to avoid frayed conductors.
the recognized product safety and electrical codes of 3)Align the lengths of the wires to be connected.
the countries in which they are to be sold. However, in Insert the wires fully into the connector.
order to maintain such compliance, it is equally impor-
4)Use a crimping tool to crimp the metal sleeve at its
tant to implement the following precautions when a set
center. Be sure to crimp fully to the complete clo-
is being serviced.
sure of the tool.
Precautions during Servicing L. When connecting or disconnecting the internal
connectors, first, disconnect the AC plug from the
A. Parts identified by the ! symbol are critical for AC outlet.
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.
1-2-1 U29PSFP
Safety Check after Servicing
Examine the area surrounding the repaired location for Chassis or Secondary Conductor
damage or deterioration. Observe that screws, parts,
and wires have been returned to their original posi- Primary Circuit Terminals
tions. Afterwards, do the following tests and confirm
the specified values to verify compliance with safety d' d
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
AC Line Voltage Clearance Distance (d), (d') Fig. 1
3mm(d)
220 to 240 V
6 mm(d') Exposed Accessible Part
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 AC Voltmeter
between B (earth ground, power cord plug prongs) Z (High Impedance)
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. One side of
B
Measuring Method (Power ON) : Power Cord Plug Prongs
Insert load Z between B (earth ground, power cord Fig. 2
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
One side of power cord plug
AC Line Voltage Load Z Leakage Current (i)
prongs (B) to:
2k RES.
i0.7mA AC Peak RF or
Connected in
i2mA DC Antenna terminals
parallel
220 to 240 V
50k RES.
i0.7mA AC Peak
Connected in A/V Input, Output
i2mA DC
parallel
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
1-2-2 U29PSFP
STANDARD NOTES FOR SERVICING
Circuit Board Indications Pb (Lead) Free Solder
a. The output pin of the 3 pin Regulator ICs is indi- When soldering, be sure to use the Pb free solder.
cated as shown.
Top View Bottom View
How to Remove / Install Flat Pack-IC
Input 1. Removal
Out In
With Hot-Air Flat Pack-IC Desoldering Machine:.
(1) Prepare the hot-air flat pack-IC desoldering
b. For other ICs, pin 1 and every fifth pin are indicated machine, then apply hot air to the Flat Pack-IC
as shown. (about 5 to 6 seconds). (Fig. S-1-1)
5
Pin 1
10
c. The 1st pin of every male connector is indicated as
shown.
Pin 1 Fig. S-1-1
(2) Remove the flat pack-IC with tweezers while apply-
ing the hot air.
Instructions for Connectors
(3) Bottom of the flat pack-IC is fixed with glue to the
1. When you connect or disconnect the FFC (Flexible CBA; when removing entire flat pack-IC, first apply
Foil Connector) cable, be sure to first disconnect soldering iron to center of the flat pack-IC and heat
the AC cord. up. Then remove (glue will be melted). (Fig. S-1-6)
2. FFC (Flexible Foil Connector) cable should be (4) Release the flat pack-IC from the CBA using twee-
inserted parallel into the connector, not at an angle. zers. (Fig. S-1-6)
Caution:
1. The Flat Pack-IC shape may differ by models. Use
an appropriate hot-air flat pack-IC desoldering
machine, whose shape matches that of the Flat
FFC Cable
Pack-IC.
2. Do not supply hot air to the chip parts around the
flat pack-IC for over 6 seconds because damage to
Connector the chip parts may occur. Put masking tape around
the flat pack-IC to protect other parts from damage.
CBA (Fig. S-1-2)
* Be careful to avoid a short circuit.
1-3-1 NOTE_1
3. The flat pack-IC on the CBA is affixed with glue, so (3) Bottom of the flat pack-IC is fixed with glue to the
be careful not to break or damage the foil of each CBA; when removing entire flat pack-IC, first apply
pin or the solder lands under the IC when removing soldering iron to center of the flat pack-IC and heat
it. 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)
Hot-air
Flat Pack-IC With Iron Wire:
Desoldering (1) Using desoldering braid, remove the solder from all
Machine pins of the flat pack-IC. When you use solder flux
CBA
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
Masking Flat Pack-IC
Tape iron or hot air blower, pull up the wire as the solder
melts so as to lift the IC leads from the CBA contact
Tweezers
pads as shown in Fig. S-1-5
Fig. S-1-2 (4) Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
With Soldering Iron: soldering iron to center of the flat pack-IC and heat
(1) Using desoldering braid, remove the solder from all up. Then remove (glue will be melted). (Fig. S-1-6)
pins of the flat pack-IC. When you use solder flux (5) Release the flat pack-IC from the CBA using twee-
which is applied to all pins of the flat pack-IC, you zers. (Fig. S-1-6)
can remove it easily. (Fig. S-1-3)
Note:
When using a soldering iron, care must be taken
Flat Pack-IC Desoldering Braid
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
Soldering Iron
Fig. S-1-3
or
(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 Iron Wire
a fine tip soldering iron or a hot air desoldering
machine. (Fig. S-1-4)
Soldering Iron
To Solid
Mounting Point
Fig. S-1-5
Sharp
Pin
Fine Tip
Soldering Iron
Fig. S-1-4
1-3-2 NOTE_1
Instructions for Handling
Semi-conductors
Fine Tip Electrostatic breakdown of the semi-conductors may
CBA Soldering Iron 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 (1M) that is prop-
erly grounded to remove any static electricity that may
be charged on the body.
Flat Pack-IC
Tweezers 2. Ground for Workbench
Be sure to place a conductive sheet or copper plate
Fig. S-1-6 with proper grounding (1M) on the workbench or
other surface, where the semi-conductors are to be
placed. Because the static electricity charge on cloth-
2. Installation ing will not escape through the body grounding band,
(1) Using desoldering braid, remove the solder from be careful to avoid contacting semi-conductors with
the foil of each pin of the flat pack-IC on the CBA so your clothing.
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.
CBA
Example :
Grounding Band
Pin 1 of the Flat Pack-IC
is indicated by a " " mark.
Fig. S-1-7
1M
Presolder CBA
1M
Conductive Sheet or
Copper Plate
Flat Pack-IC
CBA
Fig. S-1-8
1-3-3 NOTE_1
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 (S-INH) to GND. This will stop
the function of Tape Start Sensor, Tape End Sensor
and Reel Sensors. (If these TPs are connected before
plugging in the unit, the function of the sensors will
stay valid.) See Fig. 1.
Note: Because the Tape End Sensors are inactive, do
not run a tape all the way to the start or the end of the
tape to avoid tape damage.
Q505 Q504
TP507
S-INH
Fig. 1
1-4-1 HG240PFS
CABINET DISASSEMBLY INSTRUCTIONS
1. Disassembly Flowchart (1): Identification (location) No. of parts in the figures
(2): Name of the part
This flowchart indicates the disassembly steps to gain
(3): Figure Number for reference
access to item(s) to be serviced. When reassembling,
follow the steps in reverse order. Bend, route, and (4): Identification of parts to be removed, unhooked,
dress the cables as they were originally. unlocked, released, unplugged, unclamped, or
desoldered.
P=Spring, L=Locking Tab, S=Screw,
[1] Top Case CN=Connector
*=Unhook, Unlock, Release, Unplug, or Desolder
[2] Front Assembly e.g. 2(S-2) = two Screws (S-2),
2(L-2) = two Locking Tabs (L-2)
[3] VCR Chassis Unit (5): Refer to "Reference Notes."
[4] Jack CBA
Reference Notes
CAUTION: Locking Tabs (L-1) and (L-2) are fragile.
[5] Deck Assembly Be careful not to break them.
1. Remove five Screws (S-2), two Screws (S-3) and
[6] Main CBA Screw (S-4). Then, slowly lift the VCR Chassis Unit
(Deck Assembly, Jack CBA and Main CBA) up.
[7] Cylinder Shield 2. When reassembling, solder wire jumpers as shown
in Fig. D5.
3. Before installing the Deck Assembly, be sure to
2. Disassembly Method place the pin of LD-SW on Main CBA as shown in
Fig. D6. Then, install the Deck Assembly while
REMOVAL aligning the hole of Cam Gear with the pin of LD-
ID/ SW, the shaft of Cam Gear with the hole of LD-SW
LOC. PART REMOVE/*UNHOOK/ as shown in Fig. D6.
Fig.
No. UNLOCK/RELEASE/ Note
No.
UNPLUG/DESOLDER
[1] Top Case D1 7(S-1) -
Front
[2] D2 *3(L-1),*4(L-2) -
Assembly
VCR
[3] Chassis D3 5(S-2), 2(S-3), (S-4), 1
Unit
[4] Jack CBA D4 Desolder, (S-5) -
Deck D5,
[5] 2(S-6), Desolder 2,3
Assembly D6
[6] Main CBA D5 ---------- -
Cylinder
[7] D5 (S-7) -
Shield
(1) (2) (3) (4) (5)
1-5-1 HG240DC
(S-1) (S-2)
(S-1) (S-2) (S-3)
(S-2)
(S-4)
[3] VCR
Chassis Unit
(S-3)
(S-2)
[1] Top Case
(S-1)
Fig. D1
(L-2)
(L-2)
Fig. D3
[4] Jack CBA
(S-5)
Desolder
[2] Front
Assembly
(L-1)
Fig. D2
Fig. D4
1-5-2 HG240DC
[7] Cylinder Shield
Cylinder Assembly Pin
FE Head
(S-7)
ACE Head SW507
Assembly LD-SW
[6] Main CBA
[5] Deck
Assembly
[5] Deck Assembly
Cam Gear
[6] Main CBA Hole
Shaft
(S-6)
Hole
LD-SW Pin
[6] Main CBA
(S-6) Fig. D6
TOP VIEW From
From Capstan Motor
Cylinder From Assembly
From ACE Head
Assembly
FE Head Assembly Lead with
blue stripe
Printing
Lead with side
Lead with
blue stripe
white stripe
Desolder
from bottom
Lead connections of Deck Assembly and Main CBA
Fig. D5
1-5-3 HG240DC
ELECTRICAL ADJUSTMENT INSTRUCTIONS
General Note: "CBA" is an abbreviation for Head Switching Position Adjustment
"Circuit Board Assembly."
Purpose:
NOTE:
To determine the Head Switching position during
1.Electrical adjustments are required after replacing
playback.
circuit components and certain mechanical parts.
It is important to do these adjustments only after Symptom of Misadjustment:
all repairs and replacements have been com- May cause Head Switching noise or vertical jitter
pleted. Also, do not attempt these adjustments in the picture.
unless the proper equipment is available.
2.To perform these alignment / confirmation proce- Test point Adj.Point Mode Input
dures, make sure that the tracking control is set in
the center position: Press either "L5? " or "K" button J23(V-OUT) VR501
PLAY
on the remote control unit first, then the "PLAY" TP502(RF-SW) (Switching Point) -----
(SP)
button (Front Panel only). GND (MAIN CBA)
Test Equipment Required Measurement
Tape Spec.
Equipment
1.Oscilloscope: Dual-trace with 10:1 probe,
6.5H±1H
V-Range: 0.001~50V/Div., FL6A Oscilloscope
(412.7µs±63.5µs)
F-Range: DC~AC-20MHz
2.Alignment Tape (FL6A) Connections of Measurement Equipment
Oscilloscope
J23
Main CBA GND
TP502
CH1 CH2
Trig. (+)
Figure 1
EXT. Syncronize Trigger Point
CH1
1.0H 0.5H
CH2 6.5H+/-1H (412.7µs+/-63.5µs) V-Sync
Switching Pulse
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±1H(412.7µs±63.5µs) delayed posi-
tion from the rising edge of the CH2 head switching
pulse waveform.
1-6-1 HG240EA
IC501
MAIN CBA (SERVO/SYSTEM CONTROL)
AL+5V
SW507 TP507
KEY
LD-SW KEY- 1 7 SENS-INH
D502 SWITCH
S-LED
KEY- 2 8 KEY
SWITCH
AL+5V 9 LD-SW
95 CTL(+)
Q504 +5V
94 CTL(-) D561 STAND-BY
ST-S 10 ST-S
4 END-S
SENSOR CBA 80 T-REEL D562 POWER
Q562
79 S-REEL
TP506 Q503 PS503
TIMER+5V
END-S T-REEL S-REEL RESET 34 RESET POWER-LED 23
Q563 D563 CAS
Q505 Q501
END-S
CAS-LED 24 D564 TIMER
Q564
SENSOR CBA
TP501 TIMER-LED 25
Q565 D565 REC
CTL
(DECK ASSEMBLY) 97 CTL AMP OUT
REC-LED 26
CN504
2 CTL(+) TU701(TUNER UNIT)
Servo/System Control Block Diagram
CONTROL
1-7-1
HEAD 1 CTL(-) 3 SDA
12 SDA
5 SCL
AC HEAD ASSEMBLY AL+5V 11 SCL
VR501
2 PG-DELAY RS501
SW-POINT IC503 (MEMORY)
AL+5V 31 REC- REMOTE
REMOCON-IN 14 SENSOR
SAF-SW 5 SDA
SW506
6 SCL
CYLINDER ASSEMBLY CAPSTAN MOTOR REC-
SAFETY
AUDIO-SW-1
AUDIO-SW-1 29
BLOCK DIAGRAMS
AUDIO-SW-2
PG CN502 AUDIO-SW-2 30
IIC-BUS SDA TO
SENSOR 12 P-ON+15V P-ON+15V AUDIO BLOCK
CAPSTAN IIC-BUS SCL
M 11 AL+12V(2) AL+12V
MOTOR A-MUTE-H
10 GND A-MUTE-H 83
DRUM
M 9 D-PFG 90 D-PFG
MOTOR
8 D-CONT 77 D-CONT IIC-BUS SDA
IIC-BUS SDA72
7 LM-FWD/REV 81 LM- IIC-BUS SCL
FWD/REV IIC-BUS SCL71
6 GND D-REC-H
D-REC-H33
5 C-CONT 76 C-CONT RF-SW
RF-SW18
4 C-F/R 78 C-F/R C-ROTA
C-ROTA15
3 C-FG 87 C-FG D-V SYNC
D-V-SYNC 13 FROM/TO
LOADING M 2 P-ON+5V P-ON+5V VIDEO BLOCK
MOTOR 1 AL+12V/+20.5V AL+12V/+20.5V H-A-SW
H-A-SW 16
H-A-COMP
C-POW-SW H-A-COMP 17
FROM/TO 66 C-POW-SW
POWER P-ON-H V-ENV
SUPPLY 67 P-ON-H V-ENV 6
P-DOWN-L C-SYNC
BLOCK 86 P-DOWN-L C-SYNC 58
HG320BLS
REC-VIDEO SIGNAL PB-VIDEO SIGNAL MODE: SP/REC
MAIN CBA
FROM IIC-BUS SDA
IC501 (OSD) SERVO/SYSTEM
CONTROL BLOCK IIC-BUS SCL
OSD
52 CHARACTER 50
MIX
50
Video Block Diagram
IC301
Q351 BUFFER (Y/C SIGNAL PROCESS) 65 43 46 68 69 78 79
(DECK ASSEMBLY)
SERIAL
Y. DELAY DECORDER
CYLINDER ASSEMBLY
CN253
R P 96 V(R)-1 1 VIDEO (R)-1
LUMINANCE SP SP 95 V-COM 2 HEAD
TU701(TUNER UNIT) SIGNAL HEAD
EP AMP 93 V(L)-1 3 VIDEO (L)-1
PROCESS
VIDEO IN 6 94 V(L)-2 4 HEAD
TUNER V-COM 5
VIDEO OUT 24 48 BYPASS AGC VIDEO (L)-2
IN1 V(R)-2 6 HEAD
50
IN2
52 VIDEO (R)-2
HEAD
90
1-7-2
56 IN2 CHARA. EP 89
INS. Y HEAD
CCD 1H DELAY AMP 88
PB/EE REC FM WF1
+ 87
AGC TP502
MUTE 1/2 C
RF-SW
TUNER
IN1 CHROMINANCE D-REC-H
SIGNAL D-REC-H 80
PB/EE RF-SW
PROCESS
MUTE R PR P C-ROTA
C-ROTA/RF-SW 70
D-V-SYNC
D-V-SYNC 62
JACK CBA FBC Y/C
WF3 H-A-SW FROM/TO SERVO/SYSTEM
MIX H-A-SW 71 CONTROL BLOCK
J23 B H-A-COMP
V-OUT H-A-COMP 83
R P
JK101 Q101 CN101 CN151 V-ENV
V-ENV 84
V-OUT1 19 BUFFER 1 V-OUT1 1 61 C-SYNC