SERVICE MANUAL
Sec. 1: Main Section |
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Sec. 2: Deck Mechanism Section |
I Specifications |
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I Standard Maintenance |
I Preparation for Servicing |
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I Alignment for Mechanism |
I Adjustment Procedures |
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I Disassembly/Assembly of Mechanism |
I Schematic Diagrams |
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I Alignment Procedures of Mechanism |
I CBA’s |
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I Deck Exploded Views |
I Exploded views |
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I Deck Parts List |
I Parts List |
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VIDEO CASSETTE RECORDER
VCR 4500
VCR 4505
PAL
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MAIN SECTION
VIDEO CASSETTE RECORDER
VCR 4500/VCR 4505
Sec. 1: Main Section
ISpecifications
IPreparation for Servicing
IAdjustment Procedures
ISchematic Diagrams
ICBA’s
IExploded Views
IParts 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-7 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
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SPECIFICATIONS
Description |
Unit |
Minimum |
Nominal |
Maximum |
Remark |
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1. Video |
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1-1. Video Output (PB) |
Vp-p |
0.8 |
1.0 |
1.2 |
FL6A |
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1-2. Video Output (R/P) |
Vp-p |
0.8 |
1.0 |
1.2 |
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1-3. Video S/N Y (R/P) |
dB |
40 |
45 |
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SP Mode, |
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W/O Burst |
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1-4. Video Color S/N AM (R/P) |
dB |
37 |
41 |
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SP Mode |
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1-5. Video Color S/N PM (R/P) |
dB |
30 |
36 |
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SP Mode |
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1-6. Resolution (PB) |
Line |
230 |
245 |
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SP Mode |
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2. Servo |
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2-1. Jitter Low |
sec |
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0.07 |
0.12 |
SP Mode |
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2-2. Wow & Flutter |
% |
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0.3 |
0.5 |
SP Mode |
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3. Normal Audio |
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3-1. Output (PB) |
dBV |
-9 |
-6 |
-3 |
SP Mode |
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3-2. Output (R/P) |
dBV |
-9 |
-6 |
-1.5 |
SP Mode |
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3-3. S/N (R/P) |
dB |
36 |
41 |
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SP Mode |
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3-4. Distortion (R/P) |
% |
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1.0 |
4.0 |
SP Mode |
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3-5. Freq. resp (R/P) at 200Hz |
dB |
-7 |
-4 |
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SP Mode |
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(-20dB ref. 1kHz) at 6kHz |
dB |
-10 |
-4 |
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SP Mode |
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4. Tuner |
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4-1. Video output |
Vp-p |
0.8 |
1.0 |
1.2 |
E-E Mode |
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4-2. Video S/N |
dB |
39 |
42 |
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E-E Mode |
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4-3. Audio output |
dB |
-10 |
-6 |
-2 |
E-E Mode |
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4-4. Audio S/N |
dB |
40 |
46 |
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E-E Mode |
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5. Hi-Fi Audio [ VCR 4500 ] |
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5-1. Output |
dBV |
-12 |
-8 |
-4 |
SP Mode |
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5-2. Dynamic Range |
dB |
70 |
85 |
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SP Mode |
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5-3. Freq. resp (6dB B.W) |
Hz |
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20 ~ 20K |
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SP Mode |
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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 |
HG462SP |
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IMPORTANT SAFETY PRECAUTIONS
Product Safety Notice
Some electrical and mechanical parts have special safety-related characteristics which are often not evident from visual inspection, nor can the protection they give necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identified by a ! on schematics and in parts lists. Use of a substitute replacement that does not have the same safety characteristics as the recommended replacement part might create shock, fire, and/or other hazards. The Product’s Safety is under review continuously and new instructions are issued whenever appropriate. Prior to shipment from the factory, our products are carefully inspected to confirm with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.
Precautions during Servicing
A.Parts identified by the ! symbol are critical for safety. Replace only with part number specified.
B.In addition to safety, other parts and assemblies are specified for conformance with regulations applying to spurious radiation. These must also be replaced only with specified replacements.
Examples: RF converters, RF cables, noise blocking capacitors, and noise blocking filters, etc.
C.Use specified internal wiring. Note especially:
1)Wires covered with PVC tubing 2)Double insulated wires
3)High voltage leads
D.Use specified insulating materials for hazardous live parts. Note especially:
1)Insulation tape 2)PVC tubing 3)Spacers
4)Insulators for transistors
E.When replacing AC primary side components (transformers, power cord, etc.), wrap ends of wires securely about the terminals before soldering.
F.Observe that the wires do not contact heat producing 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.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 closure of the tool.
L.When connecting or disconnecting the internal connectors, first, disconnect the AC plug from the AC outlet.
1-2-1 |
U29PSFP |
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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 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’) |
≥ 3mm(d) 230 - 240 V ≥
6 mm(d’)
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
Chassis or Secondary Conductor |
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Primary Circuit Terminals |
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d' |
d |
Fig. 1
Exposed Accessible Part
Z |
AC Voltmeter |
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(High Impedance) |
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BOne side of
Power Cord Plug Prongs
Fig. 2
AC Line Voltage |
Load Z |
Leakage Current (i) |
One side of power cord plug |
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prongs (B) to: |
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2kΩ RES. |
i≤0.7mA AC Peak |
RF or |
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Connected in |
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i≤2mA DC |
Antenna terminals |
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parallel |
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230 - 240 V |
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50kΩ RES. |
i≤0.7mA AC Peak |
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Connected in |
A/V Input, Output |
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i≤2mA DC |
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parallel |
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Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
1-2-2 |
U29PSFP |
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STANDARD NOTES FOR SERVICING
Circuit Board Indications
a.The output pin of the 3 pin Regulator ICs is indicated as shown.
Top View |
Bottom View |
Out |
Input |
In |
b.For other ICs, pin 1 and every fifth pin are indicated as shown.
5
Pin 1
10
c.The 1st pin of every male connector is indicated as shown.
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
Pb (Lead) Free Solder
When soldering, be sure to use the Pb free solder.
How to Remove / Install Flat Pack-IC
1. Removal
With Hot-Air Flat Pack-IC Desoldering Machine:.
(1)Prepare the hot-air flat pack-IC desoldering machine, then apply hot air to the Flat Pack-IC (about 5 to 6 seconds). (Fig. S-1-1)
Fig. S-1-1
(2)Remove the flat pack-IC with tweezers while applying 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 tweezers. (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 Pack-IC.
2.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)
* Be careful to avoid a short circuit.
1-3-1 |
NOTE_1 |
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3.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.
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Hot-air |
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Flat Pack-IC |
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Desoldering |
CBA |
Machine |
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Masking |
Flat Pack-IC |
Tape |
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Tweezers |
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Fig. S-1-2 |
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)
Flat Pack-IC |
Desoldering Braid |
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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)
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 tweezers. (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 tweezers. (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 |
To Solid |
Mounting Point |
Fig. S-1-5 |
1-3-2 |
NOTE_1 |
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CBA |
Fine Tip |
Soldering Iron |
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Flat Pack-IC |
Tweezers |
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Fig. S-1-6 |
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.
Example :
Pin 1 of the Flat Pack-IC |
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is indicated by a " " mark. |
Fig. S-1-7 |
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Presolder |
Flat Pack-IC |
CBA |
Fig. S-1-8 |
Instructions for Handling
Semi-conductors
Electrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electrostatic charge during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a grounding band (1MΩ) that is properly grounded to remove any static electricity that may be charged on the body.
2. Ground for Workbench
Be sure to place a conductive sheet or copper plate with proper grounding (1MΩ) on the workbench or other surface, where the semi-conductors are to be placed. Because the static electricity charge on clothing will not escape through the body grounding band, be careful to avoid contacting semi-conductors with your clothing.
<Incorrect> |
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CBA |
<Correct> |
Grounding Band |
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1MΩ |
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CBA |
1MΩ |
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Conductive Sheet or
Copper Plate
1-3-3 |
NOTE_1 |
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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 |
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TP507 |
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S-INH |
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Fig. 1 |
1-4-1 |
HG240PFS |
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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.
[1] Top Case
[2]Front Assembly
[3]VCR Chassis Unit
[4]Jack CBA
[5]Deck Assembly
[6]Main CBA
[7]Cylinder Shield
[8]Jack Board [ VCR 4500 ]
2.Disassembly Method
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REMOVAL |
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ID/ |
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REMOVE/*UNHOOK/ |
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UNLOCK/RELEASE/ |
Note |
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UNPLUG/DESOLDER |
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[1] |
Top Case |
D1 |
7(S-1) |
- |
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[2] |
Front |
D2 |
*3(L-1),*4(L-2) |
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VCR Chassis |
D3-1 |
5(S-2), (S-4) |
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2(S-3) --- [ VCR 4505 ], |
1 |
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D3-2 |
3(S-3) --- [ VCR 4500 ] |
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[4] |
Jack CBA |
D4 |
Desolder, (S-5) |
- |
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[5] |
Deck |
D5 |
2(S-6), Desolder |
2,3 |
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Assembly |
D6 |
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[6] |
Main CBA |
D5 |
*(L-3) --- [ VCR 4500 ] |
- |
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[7] |
Cylinder |
D5 |
(S-7) |
- |
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Shield |
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[8] |
Jack Board |
D5 |
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[ VCR 4500 ] |
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↓ |
↓ |
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(1) |
(2) |
(3) |
(4) |
(5) |
(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), two 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. D5.
3.Before installing the Deck Assembly, be sure to place the pin of LD-SW on Main CBA as shown in Fig. D6. Then, install the Deck Assembly while aligning the hole of Cam Gear with the pin of LDSW, the shaft of Cam Gear with the hole of LD-SW as shown in Fig. D6.
(S-1)
(S-1)
[1] Top Case
(S-1)
Fig. D1
1-5-1 |
HG462DC |
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(L-2) |
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[ VCR 4500 ] |
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(L-2) |
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(S-2) |
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(S-2) |
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[3]VCR |
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Chassis |
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Unit |
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(S-2) |
[2] Front |
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Assembly |
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(L-1) |
Fig. D2 |
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[ VCR 4505 ] |
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(S-2) |
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[3] VCR |
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Chassis |
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Fig. D3-2 |
[4] Jack CBA |
(S-5) |
Desolder |
Fig. D4 |
Fig. D3-1 |
1-5-2 |
HG462DC |
Downloaded from www.Manualslib.com manuals search engine
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[7] Cylinder Shield |
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Cylinder Assembly |
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FE Head |
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ACE Head |
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SW507 |
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LD-SW |
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Assembly |
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[6] Main CBA |
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[ VCR 4500 ] |
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[8] Jack Board |
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[5] Deck |
[5] Deck Assembly |
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Cam Gear |
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Shaft |
Hole |
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Hole |
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[6] Main CBA |
LD-SW |
Pin |
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[6] Main CBA |
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Fig. D6 |
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TOP VIEW |
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Capstan Motor |
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ACE Head |
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FE Head |
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Lead with |
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blue stripe |
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Printing |
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side |
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blue stripe |
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white stripe |
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Desolder |
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from bottom |
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Lead connections of Deck Assembly and Main CBA |
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Fig. D5 |
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1-5-3 |
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HG462DC |
Downloaded from www.Manualslib.com manuals search engine |
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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 completed. Also, do not attempt these adjustments unless the proper equipment is available.
2.To perform these alignment / confirmation procedures, make sure that the tracking control is set in the center position: Press either "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 position during playback.
Symptom of Misadjustment:
May cause Head Switching noise or vertical jitter in the picture.
Test point |
Adj.Point |
Mode |
Input |
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J23(V-OUT) |
VR501 |
PLAY |
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TP502(RF-SW) (Switching Point) |
----- |
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(SP) |
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GND |
(MAIN CBA) |
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Tape |
Measurement |
Spec. |
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Equipment |
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FL6A |
Oscilloscope |
6.5H±1H |
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(412.7 s±63.5 s) |
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Connections of Measurement Equipment |
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Oscilloscope |
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Main CBA |
J23 |
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GND |
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TP502 |
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CH1 |
CH2 |
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Trig. (+) |
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Figure 1 |
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EXT. Syncronize Trigger Point |
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CH1 |
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0.5H |
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1.0H |
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CH2 |
6.5H+/-1H (412.7 s+/-63.5 s) |
V-Sync |
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Switching Pulse |
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Reference Notes:
Playback the Alignment tape and adjust VR501 so that the V-sync front edge of the CH1 video output waveform is at the 6.5H±1H(412.7 s±63.5 s) delayed position from the rising edge of the CH2 head switching pulse waveform.
1-6-1 |
HG240EA |
Downloaded from www.Manualslib.com manuals search engine
engine search manuals com.Manualslib.www from Downloaded
1-7-1
HG462BLS
Comparison Chart of |
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Models & Marks |
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IC501 |
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Model |
Mark |
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AL+5V |
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TP507 |
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MAIN CBA |
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SW507 |
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(SERVO/SYSTEM CONTROL) |
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VCR 4500 |
A |
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RS501 |
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KEY |
SENS-INH |
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LD-SW |
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KEY- 1 |
7 |
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REMOTE |
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SWITCH |
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VCR 4505 |
B |
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D502 |
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14 |
REMOCON-IN |
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S-LED |
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SENSOR |
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KEY |
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KEY- 2 |
8 |
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AL+5V |
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9 |
LD-SW |
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SWITCH |
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Q504 |
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95 CTL(+) |
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FP562 |
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94 |
CTL(-) |
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IC561 |
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LED DISPLAY |
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ST-S |
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A |
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10 ST-S |
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4 |
END-S |
DRV-DATA 68 |
28 DRV-DATA |
D1 23 |
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80 T-REEL |
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79 S-REEL |
DRV-STB |
69 |
2 |
DRV-STB |
D2 22 |
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TP506 |
Q503 |
PS503 |
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Q501 |
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DRV-CLK 70 |
1 |
DRV-CLK |
D3 21 |
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END-S |
T-REEL |
S-REEL |
TIMER+5V |
RESET |
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34 |
RESET |
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D4 20 |
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a |
17 |
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Q505 |
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TP501 |
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b |
16 |
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END-S |
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D561 |
STAND-BY |
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+5V |
CTL |
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c |
14 |
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97 CTL AMP OUT |
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d |
13 |
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SENSOR CBA |
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12 |
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D562 |
POWER |
Q562 |
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f |
7 |
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TU701(TUNER UNIT) |
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B |
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3 |
SDA |
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j |
11 |
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D563 |
CAS |
Q563 |
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23 |
POWER-LED |
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12 |
SDA |
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24 CAS-LED |
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SCL |
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25 TIMER-LED |
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11 SCL |
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CN504 |
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D564 |
TIMER |
Q564 |
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26 |
REC-LED |
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IC503 (MEMORY) |
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2 |
CTL(+) |
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CONTROL |
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5 |
SDA |
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CTL(-) |
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6 |
SCL |
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D565 |
REC |
Q565 |
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AC HEAD ASSEMBLY |
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AUDIO-SW-1 |
29 |
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AUDIO-SW-1 |
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AUDIO-SW-2 |
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AUDIO-SW-2 |
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TO |
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AL+5V |
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IIC-BUS SDA |
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AUDIO BLOCK |
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VR501 |
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IIC-BUS SCL |
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2 |
PG-DELAY |
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SW-POINT |
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A-MUTE-H |
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AL+5V |
31 REC-SAF-SW |
A-MUTE-H |
83 |
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CYLINDER ASSEMBLY |
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CAPSTAN MOTOR |
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IIC-BUS SDA |
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PG |
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CN502 |
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SW506 |
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A |
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IIC-BUS SCL |
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12 P-ON+15V |
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P-ON+15V |
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FROM/TO |
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SENSOR |
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Hi-Fi-H-SW |
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REC-SAFETY |
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11 AL+12V(2) |
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AL+12V |
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Hi-Fi-H-SW |
19 |
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Hi-Fi AUDIO |
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A-MODE |
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10 GND |
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A-MODE |
32 |
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BLOCK |
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LINE-MUTE |
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9 |
D-PFG |
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90 D-PFG |
LINE-MUTE |
28 |
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DRUM |
M |
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8 |
D-CONT |
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77 D-CONT |
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MOTOR |
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IIC-BUS SDA |
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7 |
LM-FWD/REV |
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81 |
LM-FWD/REV IIC-BUS SDA |
72 |
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IIC-BUS SCL |
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6 |
GND |
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IIC-BUS SCL |
71 |
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D-REC-H |
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5 |
C-CONT |
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76 |
C-CONT |
D-REC-H |
33 |
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CAPSTAN |
M |
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RF-SW |
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4 |
C-F/R |
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78 |
C-F/R |
RF-SW |
18 |
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MOTOR |
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C-ROTA |
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3 |
C-FG |
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87 |
C-FG |
C-ROTA |
15 |
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FROM/TO |
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M |
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D-V-SYNC |
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P-ON+5V |
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LOADING |
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2 |
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P-ON+5V |
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D-V-SYNC |
13 |
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VIDEO BLOCK |
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MOTOR |
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1 |
AL+12V/+20.5V |
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AL+12V/+20.5V |
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A |
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H-A-SW 16 |
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H-A-SW |
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H-A-COMP |
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H-A-COMP 17 |
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FROM/TO |
C-POW-SW |
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66 |
C-POW-SW |
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P-ON-H |
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V-ENV |
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POWER |
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67 |
P-ON-H |
V-ENV |
6 |
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SUPPLY |
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P-DOWN-L |
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C-SYNC |
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P-DOWN-L |
C-SYNC 58 |
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BLOCK |
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86 |
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DIAGRAMS BLOCK
Diagram Block Control Servo/System
engine search manuals com.Manualslib.www from Downloaded
2-7-1
|
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|
REC-VIDEO SIGNAL |
PB-VIDEO SIGNAL |
MODE: SP/REC |
Comparison Chart of |
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Models & Marks |
|
MAIN CBA |
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Model |
Mark |
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FROM |
IIC-BUS SDA |
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VCR 4500 |
A |
|||
|
IC501 (OSD) |
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||||||
|
SERVO/SYSTEM |
IIC-BUS SCL |
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VCR 4505 |
B |
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CONTROL BLOCK |
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OSD |
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52 |
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CHARACTER |
50 |
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MIX |
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IC301 |
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Q351 |
BUFFER |
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(Y/C SIGNAL PROCESS) |
|
65 |
43 |
46 |
68 69 |
78 |
79 |
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SERIAL |
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(DECK ASSEMBLY) |
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Y. DELAY |
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DECORDER |
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CN253 |
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CYLINDER ASSEMBLY |
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LUMINANCE |
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R |
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P |
SP |
96 |
V(R)-1 |
1 |
VIDEO (R)-1 |
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SP |
95 |
V-COM |
2 |
HEAD |
|||
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TU701(TUNER UNIT) |
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SIGNAL |
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HEAD |
|||||||
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93 |
V(L)-2 |
3 |
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PROCESS |
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EP |
AMP |
VIDEO (L)-1 |
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VIDEO-IN |
6 |
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TUNER |
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94 |
V(L)-2 |
4 |
HEAD |
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VIDEO-OUT |
24 |
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48 |
BYPASS |
AGC |
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V-COM |
5 |
VIDEO (L)-2 |
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IN1 |
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50 |
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V(R)-2 |
6 |
HEAD |
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IN2 |
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52 |
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VIDEO (R)-2 |
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FRT |
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JK756 |
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54 |
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90 |
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HEAD |
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FRONT |
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A |
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V-IN |
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56 |
IN2 |
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CHARA. |
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EP |
89 |
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INS. |
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HEAD |
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FRT |
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Y |
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88 |
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CCD 1H DELAY |
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AMP |
WF1 |
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A |
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PB/EE |
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REC FM |
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+ |
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87 |
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AGC |
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TP502 |
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MUTE |
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1/2 |
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C |
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RF-SW |
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TUNER |
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CHROMINANCE |
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IN1 |
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D-REC-H |
80 |
D-REC-H |
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SIGNAL |
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PB/EE |
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RF-SW |
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PROCESS |
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R |
P R |
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P |
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C-ROTA |
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MUTE |
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70 |
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C-ROTA/RF-SW |
D-V-SYNC |
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D-V-SYNC |
62 |
FROM/TO SERVO/SYSTEM |
||
|
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JACK CBA |
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FBC |
Y/C |
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||||
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WF3 |
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CONTROL BLOCK |
||||
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MIX |
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A |
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H-A-SW |
|||
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J23 |
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H-A-SW 71 |
|
|||||
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|||
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V-OUT |
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H-A-COMP |
|
|||
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R |
P |
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|
H-A-COMP 83 |
|
||||
|
JK101 Q101 CN101 |
|
|
CN151 |
|
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|||||||
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|||||||
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|
V-ENV |
84 |
V-ENV |
|
||||||
V-OUT1 |
19 |
BUFFER |
1 |
V-OUT1 |
1 |
|
61 |
|
|
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|
C-SYNC |
|
|||||
|
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AGC |
|
VXO |
|
|
|
|
C-SYNC |
67 |
|
||||||||||||
V-IN1 |
20 |
|
|
3 |
V-IN1 |
|
3 |
|
63 |
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|||||
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|||||||||
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|
JK102 Q102 CN102 |
|
|
CN152 |
|
|
|
58 |
59 |
|
28 |
29 |
25 |
|
21 |
|
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|
|||
V-OUT2 |
19 |
BUFFER |
1 |
V-OUT2 |
1 |
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||
V-IN2 |
20 |
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|
3 |
V-IN2 |
|
3 |
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|
X301 |
TP301 |
|
4.433619MHz |
||
C-PB |
||
|
||
|
WF2 |
Diagram Block Video
HG462BLV
engine search manuals com.Manualslib.www from Downloaded
3-7-1
HG462BLA
Comparison Chart of
Models & Marks
Model |
Mark |
VCR 4500 |
A |
VCR 4505 |
B |
PB-AUDIO SIGNAL |
REC-AUDIO SIGNAL |
Mode : SP/REC |
MAIN CBA
N-A-PB
TO Hi-Fi |
N-A-REC |
AUDIO BLOCK
|
IC301 |
|
|
13 15 |
17 |
|
|
|
|
|
(AUDIO SIGNAL PROCESS) |
|
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|
|
||||
|
|
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|
IN1 |
|
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|
TUNER |
IN2 |
|
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ALC |
|
|
12 |
|
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|
|
DET |
|
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||
|
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|
INV |
|
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||
|
PB-ON |
|
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|
||
|
|
|
R |
|
LINE |
|
|
||
5 |
EQ |
|
|
ALC |
MUTE |
11 |
|||
8 |
9 |
ATT |
AMP |
||||||
6 |
AMP |
|
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|
|||||
|
|
P |
|
|
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|
|||
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|
(DECK ASSEMBLY) |
|
SP/LP-ON |
|
+5V |
7 |
|
|
ACE HEAD ASSEMBLY |
|
|
|
|
|
|
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|
|
CN504 |
Q401 |
|
|
|
REC-ON |
|
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|
||
|
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|
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|
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|
AUDIO |
3 |
A-PB/REC |
Q402 |
|
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|
|
HEAD |
4 |
A-COM |
|
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|
|
|
BIAS |
|
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|
|||
AUDIO |
6 |
AE-H |
|
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|
OSC |
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|
|||
ERASE |
5 |
AE-H/FE-H |
|
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|
|
|
1 |
AUTO |
|
|
REC |
|||
HEAD |
|
|
3 |
100 |
|||
|
|
2 |
BIAS |
AMP |
|||
|
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|
|||
|
|
|
Q406 |
|
|
|
|
|
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|
|
|
SERIAL |
|
|
|
|
|
AUDIO HD-SW |
DECODER |
|
|
|
|
|
|
|
|
|
FE HEAD |
|
|
CONTROL |
|
|
|
CN501 |
Q403 |
16 |
68 69 71 |
|
|
|
|
|
|
|
||
FULL |
|
|
+5V |
|
|
|
2 |
FE-H |
|
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|
||
ERASE |
Q405 |
|
|
|
||
1 FE-H-GND |
|
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|
|||
HEAD |
(PB=ON) |
|
A-MUTE-H |
|
||
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|||
|
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|
|
|
IIC-BUS SDA |
TO SERVO/SYSTEM |
|
|
|
|
|
IIC-BUS SCL |
CONTROL BLOCK |
) A ( Diagram Block Audio
engine search manuals com.Manualslib.www from Downloaded
4-7-1
HG210BLA
Comparison Chart of
Models & Marks
Model |
|
Mark |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
VCR 4500 |
A |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
VCR 4505 |
B |
|
|
|
|
|
|
|
|
PB-AUDIO SIGNAL |
REC-AUDIO SIGNAL |
Mode : SP/REC |
||||
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
JACK CBA |
|
|
|
TU701(TUNER UNIT) |
|
|
|
MAIN CBA |
|
|
|
|
|
|
|
JK101 |
|
|
|
AUDIO 2 |
|
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|
TU-AUDIO 21 |
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||
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|
A-IN1 |
2 |
CN101 |
|
|
CN151 |
|
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|
|
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|
|
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|
|
|
A-IN1 |
6 |
7 |
A-IN1(L) |
|
7 |
|
|
|
|
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|
|
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|
|
|
A-OUT1 |
1 |
5 |
A-OUT1(R) |
5 |
|
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|
|
|
A-OUT1 |
3 |
|
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|
JK102 |
|
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|
|
IC151 (SWITCHING) |
|
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PB/EE |
|
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||
A-IN2 |
2 |
CN102 |
|
|
CN152 |
|
|
|
|
|
1 |
|
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|
|
|
|
|
|
|
|
Q151 |
|
PB/EE |
|
|
|
|
|||||
A-IN2 |
6 |
8 |
A-IN2(L) |
|
8 |
|
|
|
|
5 |
|
|
|
|
||
|
|
|
|
BUFFER |
3 |
PB/EE |
|
|
|
|
||||||
A-OUT2 |
1 |
6 |
A-OUT2(R) |
6 |
|
|
|
2 |
|
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|
|
||||
|
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|
IN2 |
|
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|
|||||||
A-OUT2 |
3 |
|
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|
4 |
|
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|||
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|
|
|
TUNER |
12 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Q152 |
|
PB/EE |
|
|
|
|
|
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|
|
14 |
|
|
|
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||
|
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|
|
BUFFER |
13 |
IN1 |
|
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|
15 |
|
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|||
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|
IN1 |
|
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11 |
|
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|
|
SW |
10 |
AUDIO-SW-1 |
TO SERVO/SYSTEM |
||
|
|
|
|
|
|
|
|
|
|
|
AUDIO-SW-2 |
|||||
|
|
|
|
|
|
|
|
|
|
|
CTL |
9 |
CONTROL BLOCK |
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
IC301 (AUDIO SIGNAL PROCESS) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
13 |
TUNER |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
IN1 |
|
|
|
|
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|
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|
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|
|
|
15 |
|
|
|
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|
IN2 |
|
|
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|
17 |
|
|
|
ALC |
|
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|
|
|
|
|
|
|
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|
12 |
|
||
|
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|
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|
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|
DET |
|
|
|
|
|
|
|
|
|
|
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|
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|
|
INV |
|
|
|
|
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|
|
|
|
|
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|
|
PB-ON |
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
R |
LINE |
|
|
|
|
|
|
|
|
|
|
|
5 |
EQ |
|
|
|
MUTE |
|
11 |
|
||
|
|
|
|
|
|
8 |
9 |
|
ALC |
AMP |
|
|
||||
|
|
|
|
|
|
6 |
AMP |
|
ATT |
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
P |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(DECK ASSEMBLY) |
|
|
|
|
SP/LP-ON |
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
+5V |
|
7 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ACE HEAD ASSEMBLY |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
CN287 |
|
|
CN504 |
Q401 |
|
|
|
|
|
REC-ON |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
AUDIO |
|
A-PB/REC |
3 |
3 |
A-PB/REC |
Q402 |
|
|
|
|
|
|
|
|
|
|
HEAD |
|
A-COM |
4 |
4 |
A-COM |
|
|
|
|
|
|
|
|
|
|
|
|
BIAS |
|
|
|
|
|
|
|
|
|
|
|||||
AUDIO |
|
AE-H |
6 |
6 |
AE-H |
|
|
|
|
|
|
|
|
|
|
|
|
OSC |
|
|
|
|
|
|
|
|
|
|
|||||
ERASE |
|
AE-H/FE-H |
5 |
5 |
AE-H/FE-H |
|
|
|
|
|
|
|
|
|
|
|
|
1 |
AUTO |
|
|
|
REC |
|
|
|
|
|
|||||
HEAD |
|
|
|
|
|
3 |
100 |
|
|
|
|
|
|
|||
|
|
|
|
|
2 |
BIAS |
|
AMP |
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
Q406 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SERIAL |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
AUDIO HD-SW |
DECODER |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
FE HEAD |
|
|
|
Q403 |
|
|
|
|
CONTROL |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
16 |
68 69 |
71 |
|
|
|
|||
|
|
|
CN501 |
(SWITCHING) |
|
|
|
|
|
|
|
|||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
FULL |
|
|
|
|
+5V |
|
|
|
|
|
A-MUTE-H |
|
|
|||
|
|
|
2 |
FE-H |
|
|
|
|
|
|
|
|||||
ERASE |
|
|
Q405 |
|
|
|
|
|
|
IIC-BUS SDA |
TO SERVO/SYSTEM |
|||||
|
|
1 FE-H-GND |
|
|
|
|
|
|
||||||||
HEAD |
|
|
|
(PB=ON) |
|
|
|
|
|
|
IIC-BUS SCL |
CONTROL BLOCK |
||||
|
|
|
|
|
|
|
|
|
|
|
) B ( Diagram Block Audio
.www from Downloaded |
|
|
|
|
|
.Manualslib |
VCR 4500 |
A |
|
|
|
|
Comparison Chart of |
|
|
||
|
Models & Marks |
|
|
||
com |
Model |
Mark |
|
|
|
VCR 4505 |
B |
|
|
||
manuals |
|
|
|||
|
JACK CBA |
|
|
||
|
|
JK101 |
CN101 |
|
CN151 |
|
|
|
|
||
search |
A-IN1(R) |
2 |
9 |
A-IN1(R) |
9 |
A-OUT1(L) |
3 |
11 |
A-OUT1(L) |
11 |
|
|
A-IN1(L) |
6 |
7 |
A-IN1(L) |
7 |
engine |
A-OUT1(R) |
1 |
5 |
A-OUT1(R) |
5 |
|
JK102 |
CN102 |
|
CN152 |
|
|
|
|
|
||
|
A-IN2(R) |
2 |
9 |
A-IN2(R) |
9 |
|
A-IN2(L) |
6 |
8 |
A-IN2(L) |
8 |
|
A-OUT2(R) |
1 |
6 |
A-OUT2(R) |
6 |
|
A-OUT2(L) |
3 |
11 |
A-OUT2(L) |
11 |
5-7-1
JK758
A-IN(R)
FRONT
JK757
A-IN(L)
N-A-REC
TO AUDIO BLOCK N-A-PB
|
|
|
|
|
|
|
|
|
|
|
PB-AUDIO SIGNAL |
REC-AUDIO SIGNAL |
|
Mode : SP/REC |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
CN509 |
|
JK751 |
|
|
|
|
|
|
MAIN CBA |
|
|
|
|
|
2 |
A-OUT1(L) |
|
A-OUT |
|
|
|
|
|
|
|
|
|
|
|
|
1 |
A-OUT1(R) |
|
(L) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
A-OUT |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(R) |
|
|
|
|
|
|
|
|
|
|
|
|
|
SUB JACK CBA |
||
|
|
|
|
|
|
AFV CBA |
|
|
|
|
|
|
|
TU701 |
|
|
|
|
CN701 |
|
CN1 |
|
CN1 |
|
CN701 |
|
|
|
|
(TUNER UNIT) |
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
4 |
TU-AUDIO(R) |
4 |
IF SIGNAL |
2 |
SIF |
2 |
|
|
|
22 SIF OUT |
||
|
|
|
5 |
TU-AUDIO(L) |
5 |
PROCESS |
|
|
|
|
|
|
|
|
|
IC451 (Hi-Fi AUDIO SIGNAL PROCESS) |
|
|
|
|
|
|
|
|
|
|
|
|
|||
67 |
|
|
|
|
|
|
|
|
|
|
MUTE-ON |
73 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
65 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
74 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SW |
|
|
|
|
OUTPUT |
|
|
|
VCO |
MUTE |
72 |
|
2 |
AUDIO IN |
|
|
|
|
|
|
SELECT |
|
|
|
|
|||||
|
|
SW |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
76 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ALC |
ALC |
ALC |
|
|
|
|
|
|
|
MUTE-ON |
77 |
|
|
|
|
|
|
|
|
|
|
|
75 |
|
|
|
||||
|
62 |
70 |
|
|
|
SW |
|
|
|
R-CH |
|
|
IIC-BUS SDA |
|
|
|
|
|
|
|
|
|
COMP |
|
37 |
|
|
||||
|
|
|
|
|
|
NOISE |
|
BPF |
LOGIC |
IIC-BUS SCL |
|
|
|||
|
61 |
71 |
|
R-CH |
|
|
|
|
38 |
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
|
|
Q451 |
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PNR |
P |
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NOISE |
ENV |
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21 |
FROM/TO |
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DET |
DET |
LINE-MUTE |
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R |
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SERVO/SYSTEM |
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52 |
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47 |
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MUTE 53 |
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CONTROL BLOCK |
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56 |
R-CH |
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48 |
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LIM |
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DEV |
VCO |
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54 |
INSEL |
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50 |
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HOLD |
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39 |
Hi-Fi-H-SW |
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60 |
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PULSE |
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LPF |
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2 |
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MIX |
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V/I |
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6 |
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10 |
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L-CH |
14 |
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LPF |
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8 |
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INSEL |
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(DECK ASSEMBLY) |
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4 |
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15 |
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LIM |
DEV |
VCO |
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L-CH |
R |
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CYLINDER |
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DO |
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ASSEMBLY |
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PNR |
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P |
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DET |
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ALC |
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CN253 |
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+ |
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Hi-Fi |
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R |
24 |
Hi-Fi-A(R) |
7 |
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SW |
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L-CH |
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COMP |
LIM |
26 |
Hi-Fi-COM |
8 |
AUDIO |
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78 |
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NOISE |
BPF |
(R) HEAD |
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L |
27 |
Hi-Fi-A(L) |
9 |
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80 |
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Hi-Fi |
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AUDIO |
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34 33 |
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(L) HEAD |
) A ( Diagram Block Audio Fi-Hi
HG462BLH
engine search manuals com.Manualslib.www from Downloaded
6-7-1
Comparison Chart of |
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Models & Marks |
NOTE : |
|
Model |
Mark |
The voltage for parts in hot circuit is measured using |
VCR 4500 |
A |
hot GND as a common terminal. |
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VCR 4505 |
B |
|
HOT CIRCUIT. BE CAREFUL.
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE T1.6AL/250V FUSE.
CAUTION !
Fixed voltage (or Auto voltage selectable ) power supply circuit is used in this unit. If Main Fuse (F001) is blown, check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
MAIN CBA
A
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T001 |
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B |
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F001 |
L003 |
D001 - D004 |
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T1.6A L 250V |
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BRIDGE |
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Q051 |
P-ON+15V |
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LINE |
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AC001 |
2 |
12 |
P-ON+44V |
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FILTER |
RECTIFIER |
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P-ON-H |
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Q052 |
AL+12V/+20.5V |
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Q053 |
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13 |
AL+9V |
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AL+12V |
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Q057 |
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C-POW-SW |
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AL+5V |
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4 |
14 |
TIMER+5V |
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Q058 |
P-ON+5V |
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P-DOWN-L |
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Q055 |
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Q001 |
15 |
AL-5V |
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Q054 |
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16 |
Q059 |
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Q002 |
B |
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11 |
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7 |
17 |
Q056 |
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6 |
18 |
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Q004 |
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SHUNT |
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IC001 |
REGULATOR |
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ERROR |
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Q003 |
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VOLTAGE DET |
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4 |
1 |
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HOT |
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3 |
2 |
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COLD |
Diagram Block Supply Power
HG462BLP
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
[ VCR 4500 ]
MODE |
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INDICATOR ACTIVE |
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POWER ON |
" PWR." |
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ON |
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CASSETTE "IN" |
" |
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" |
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ON |
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CASSETTE "OUT" |
" |
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" |
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OFF |
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CLOCK |
" 88:88 " |
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ON |
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REC |
" REC " |
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ON |
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REC PAUSE |
" REC " |
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Blinks at 0.8Hz interval |
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T-REC,OTR |
" |
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" |
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ON |
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(T-REC OFF,T-REC incomplete |
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Blinks at 0.8Hz interval) |
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RF OUT |
RF out channel number is displayed on the indicator panel. |
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S-INH condition |
All modes |
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Blinks at 0.8Hz interval |
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All lighting mode |
All characters |
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ON |
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When reel and capstan mechanism is not |
“A R” is displayed on a TV screen. (Refer to Fig. 1.) |
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functioning correctly |
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When tape loading mechanism is not func- |
“A T” is displayed on a TV screen. (Refer to Fig. 2.) |
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tioning correctly |
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When cassette loading mechanism is not |
“A C” is displayed on a TV screen. (Refer to Fig. 3.) |
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functioning correctly |
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When the drum is not working properly |
“A D” is displayed on a TV screen. (Refer to Fig. 4.) |
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P-ON Power safety detection |
“A P” is displayed on a TV screen. (Refer to Fig. 5.) |
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1-7-7 |
HG462FIS |
Downloaded from www.Manualslib.com manuals search engine
[ VCR 4505 ]
FUNCTION |
TAPE IN |
TIMER |
STANDBY
REC
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" H "= LED Light on, " L "= LED Light off |
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MODE |
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INDICATOR ACTIVE |
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STANDBY |
Power on = " H " |
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Power off = " L " |
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FUNCTION |
VCR mode = " H " |
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TV mode = " L " |
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TAPE IN |
Cassette in = " H " |
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Cassette out = " L " |
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TIMER |
Timer stand by = " H " |
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One touch recording = " H " |
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Timer recording = " H " |
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General mode = " L " |
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REC |
REC mode = " H " |
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REC pause |
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Blinks at 0.8Hz interval |
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General mode = " L " |
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When reel and capstan mechanism is not |
“A R” is displayed on a TV screen. (Refer to Fig. 1.) |
||
functioning correctly |
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When tape loading mechanism is not func- |
“A T” is displayed on a TV screen. (Refer to Fig. 2.) |
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tioning correctly |
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When cassette loading mechanism is not |
“A C” is displayed on a TV screen. (Refer to Fig. 3.) |
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functioning correctly |
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When the drum is not working properly |
“A D” is displayed on a TV screen. (Refer to Fig. 4.) |
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P-ON Power safety detection |
“A P” is displayed on a TV screen. (Refer to Fig. 5.) |
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1-7-8 |
HG462FIS |
Downloaded from www.Manualslib.com manuals search engine
TV screen
Note:
OSD for mechanical error will be displayed for 5 sec. after the mechanical error occurs.
When reel and capstan mechanism is not functioning |
When the drum is not working properly |
correctly |
|
A R |
A D |
Fig. 1 |
Fig. 4 |
When tape loading mechanism is not functioning cor- |
P-ON Power safety detection |
rectly |
|
A T |
A P |
Fig. 2 |
Fig. 5 |
When cassette loading mechanism is not functioning correctly
A C
Fig. 3
1-7-9 |
HG462FIS |
Downloaded from www.Manualslib.com manuals search engine
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 replacement 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 features 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 specified in the parts list may create shock, fire, or other hazards.
Capacitor Temperature Markings
Mark |
Capacity |
Standard |
Temperature |
|
change rate |
temperature |
range |
||
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(B) |
±10% |
20°C |
-25~+85°C |
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(F) |
+30 - 80% |
20°C |
-25~+85°C |
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(SR) |
±15% |
20°C |
-25~+85°C |
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(Z) |
+30 - 80% |
20°C |
-10~+70°C |
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Notes:
1.Do not use the part number shown on these drawings 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 otherwise specified.
4.All capacitance values are indicated in F (P=10-6 F).
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 digits 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.
CBA Symbols
(Top View) (Bottom View)
+
Electrolytic Capacitor
(Bottom View)
Transistor or Digital Transistor
E C B
(Top View) |
(Top View) |
|
NPN Transistor |
PNP Transistor |
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E C B |
E C B |
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(Top View) |
(Top View) |
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NPN Digital Transistor |
PNP Digital |
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Transistor |
||
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E C B |
E C B |
Schematic Diagram Symbols
Digital Transistor
1-8-1 |
SCPA1 |
Downloaded from www.Manualslib.com manuals search engine
LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES:
1. CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE.
2. CAUTION:
Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F001) is blown, first 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.
3. Note:
(1) Do not use the part number shown on the drawings for ordering. The correct part number is shown in the parts list, and may be slightly different or amended since the drawings were prepared.
(2) To maintain original function and reliability of repaired units, use only original replacement parts which are listed with their part numbers in the parts list section of the service manual.
4. Mode: SP/REC
5. Voltage indications for PLAY and REC modes on the schematics are as shown below:
Unit: Volts |
1 |
2 |
3 |
PLAY mode |
|
REC mode |
|||||
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5.0 |
5.0 |
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(2.5) |
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The same voltage for
both PLAY & REC modes Indicates that the voltage is not consistent here.
6. How to read converged lines |
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1-D3 |
3 |
|
|
1-B1 |
|
Distinction Area |
AREA D3 |
||||
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||||
Line Number |
2 |
|
AREA B1 |
||
(1 to 3 digits) |
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||||
Examples: |
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|
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|
1. "1-D3" means that line number "1" goes to area "D3". |
1 |
1-D3 |
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||
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|||
2. "1-B1" means that line number "1" goes to area "B1". |
A |
B |
C |
D |
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|||||
7. 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. |
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|
|
|
: Used to indicate a test point with a test pin.
1-8-2 |
SCRK05 |
Downloaded from www.Manualslib.com manuals search engine