Emerson EWV601B Schematic
SERVICE MANUAL
Sec. 1: Main Section
I
Specifications
I
Preparation for Servicing
I
Adjustment Procedures
I
Schematic Diagrams
I
CBA’s
Sec. 2: Deck Mechanism Section
I
Standard Maintenance
I
Alignment for Mechanism
I
Disassembly/Assembly of Mechanism
I
Alignment Procedures of Mechanism
Sec. 3: Exploded views
and Parts List Section
I
Exploded views
I
Parts List
VIDEO CASSETTE RECORDER
VIDEO L AUDIO R
EWV601A
POWER
VCR/TV
POWER VCR/TV TAPE IN TIMER REC
CHANNELTAPE SPEED
PLAY
REW
REC
OTR
F.FWD
PAUSE
STILL
S
T
C
T
E
O
J
P
E
/
MENU
VIDEO L AUDIO R
KVS600A
TAPE INPOWER VCR/TV
TIMER
POWER
VCR/TV
REC
TAPE SPEED
PLAY
F.FW D
REW
PAUSE/
REC/
OTR
CHANNEL
STOP/EJECT
STILL
MENU
SSV6001A
V
T
/
R
C
V
R
E
W
O
VIDEO AUDIOLR
P
VCR/TV
POWER
TAPE IN TIMER
PLAY
STOP/EJECT
F.FWD
REW
PAUSE/STILL
T
A
P
E
S
P
E
REC
REC/OTR
E
D
C
H
A
N
N
E
L
MENU
IMPORTANT SAFETY NOTICE
Proper service and repair is important to the safe, reliable operation of all
Funai Equipment. The service procedures recommended by Funai and
described in this service manual are effective methods of performing service
operations. Some of these service special tools should be used when and as
recommended.
It is important to note that this service manual contains various CAUTIONS
and NOTICES which should be carefully read in order to minimize the risk of
personal injury to service personnel. The possibility exists that improper service methods may damage the equipment. It also is important to understand
that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE. Funai could not
possibly know, evaluate and advice the service trade of all conceivable ways
in which service might be done or of the possible hazardous consequences of
each way. Consequently, Funai has not undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by Funai must first use all precautions thoroughly so that neither his safety nor the safe operation of the equipment will be jeopardized by
the service method selected.
MAIN SECTION
VIDEO CASSETTE RECORDER
EWV601A/KVS600A/SSV6001A
Sec. 1: Main Section
I
Specifications
I
Preparation for Servicing
I
Adjustment Procedures
I
Schematic Diagrams
I
CBA’s
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
Operating Controls and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5-1
Cabinet Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6-1
Electrical Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-1
Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8-1
Function Indicator Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8-11
Power Supply Trouble Shooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8-12
Schematic Diagrams / CBA’s and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9-1
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10-1
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11-1
System Control Timing Charts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12-1
IC Pin Function Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13-1
Lead Identifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14-1
SPECIFICATIONS
Description Unit Minimum Nominal Maximum Remark
1. Video
1-1. Video Output (PB) Vp-p 0.8 1.0 1.2 SP Mode
1-2. Video Output (R/P) Vp-p 0.8 1.0 1.2
1-3. Video S/N Y (R/P) dB 40 45
1-4. Video Color S/N AM (R/P) dB 37 41 SP Mode
1-5. Video Color S/N PM (R/P) dB 30 36 SP Mode
1-6. Resolution (PB) Line 230 245 SP Mode
2. Servo
2-1. Jitter Low µsec 0.07 0.12 SP Mode
2-2. Wow & Flutter % 0.3 0.5 SP Mode
3. Normal Audio
3-1. Output (PB) dBV -9 -6 -3 SP Mode
3-2. Output (R/P) dBV -9 -6 -1.5 SP Mode
3-3. S/N (R/P) dB 36 41 SP Mode
3-4. Distortion (R/P) % 1.0 4.0 SP Mode
3-5. Freq. resp (R/P) at 200Hz dB -11 -4 SP Mode
(-20dB ref. 1kHz) at 8kHz dB -14 -4 SP Mode
SP Mode,
W/O Burst
4. Tuner
4-1. Video output Vp-p 0.8 1.0 1.2 E-E Mode
4-2. Video S/N dB 39 42 E-E Mode
4-3. Audio output dB -10 -6 -2 E-E Mode
4-4. Audio S/N dB 40 46 E-E Mode
5. Hi-Fi Audio
5-1. Output dBV -12 -8 -4 SP Mode
5-2. Dynamic Range dB 70 85 SP Mode
5-3. Freq. resp (6dB B.W) Hz 20 ~ 20K SP Mode
: Nominal specs represent the design specs. All units should be able to approximate these – some will exceed
Note
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 HB400SP
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
Parts identified by the # symbol are critical for
A.
safety. Replace only with part number specified.
In addition to safety, other parts and assemblies
B.
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.
Use specified internal wiring. Note especially:
C.
1)Wires covered with PVC tubing
2)Double insulated wires
3)High voltage leads
Use specified insulating materials for hazardous
D.
live parts. Note especially:
1)Insulation tape
2)PVC tubing
3)Spacers
4)Insulators for transistors
When replacing AC primary side components
E.
(transformers, power cord, etc.), wrap ends of
wires securely about the terminals before soldering.
Observe that the wires do not contact heat produc-
F.
ing parts (heatsinks, oxide metal film resistors, fusible resistors, etc.).
Check that replaced wires do not contact sharp
G.
edges or pointed parts.
When a power cord has been replaced, check that
H.
5 - 6 kg of force in any direction will not loosen it.
.
Also check areas surrounding repaired locations.
I.
Be careful that foreign objects (screws, solder
J.
droplets, etc.) do not remain inside the set.
Crimp type wire connector
K.
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:
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.
When connecting or disconnecting the internal con-
L.
nectors, first, disconnect the AC plug from the AC
outlet.
Do not re-use a connector. (Discard it.)
1-2-1 SFTY_03
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’)
120 V
This table is unofficial and for reference only.
Note:
Be sure to confirm the precise values.
≥ 3.2 mm (0.126 inches)
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.
Z
1.5kΩ
Chassis or Secondary Conductor
Primary Circuit Terminals
dd'
Exposed Accessible Part
AC Voltmeter
0.15µF
Earth Ground
B
Power Cord Plug Prongs
(High Impedance)
Fig. 1
Table 2: Leakage current ratings for selected areas
AC Line Voltage Load Z Leakage Current (i) Earth Ground (B) to:
0.15
F CAP. & 1.5kΩ RES.
120 V
This table is unofficial and for reference only. Be sure to confirm the precise values.
Note:
µ
Connected in parallel
i≤0.5mA Peak Exposed accessible parts
1-2-2 SFTY_03
Fig. 2
STANDARD NOTES FOR SERVICING
Circuit Board Indications
a. The output pin of the 3 pin Regulator ICs is indi-
cated as shown.
Top View
Out
b. For other ICs, pin 1 and every fifth pin are indicated
as shown.
Input
In
Pin 1
c. The 1st pin of every male connector is indicated as
shown.
Pin 1
Bottom View
5
10
How to Remove / Install Flat Pack-IC
1. Removal
With Hot-Air Flat Pack-IC Desoldering Machine:
(1) Prepare the hot-air flat pack-IC desoldering
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 apply-
ing the hot air.
(3) Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. S-1-6)
(4) Release the flat pack-IC from the CBA using twee-
zers. (Fig. S-1-6)
.
Instructions for Connectors
1. When you connect or disconnect the FFC (Flexible
Foil Connector) cable, be sure to first disconnect
the AC cord.
2. FFC (Flexible Foil Connector) cable should be
inserted parallel into the connector, not at an angle.
FFC Cable
Connector
CBA
* Be careful to avoid a short circuit.
Caution:
1. Do not supply hot air to the chip parts around the
flat pack-IC for over 6 seconds because damage
to the chip parts may occur. Put masking tape
around the flat pack-IC to protect other parts from
damage. (Fig. S-1-2)
2. The flat pack-IC on the CBA is affixed with glue, so
be careful not to break or damage the foil of each
pin or the solder lands under the IC when removing
it.
Hot-air
Flat Pack-IC
Desoldering
CBA
Masking
Tape
Tweezers
Machine
Flat Pack-IC
Fig. S-1-2
1-3-1 NOTE_1
With Soldering Iron:
(1) Using desoldering braid, remove the solder from all
pins of the flat pack-IC. When you use solder flux
which is applied to all pins of the flat pack-IC, you
can remove it easily. (Fig. S-1-3)
Flat Pack-IC
Desoldering Braid
(4) Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. S-1-6)
(5) Release the flat pack-IC from the CBA using twee-
zers. (Fig. S-1-6)
Note:
When using a soldering iron, care must be taken
to ensure that the flat pack-IC is not being held by
glue. When the flat pack-IC is removed from the
CBA, handle it gently because it may be damaged
if force is applied.
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 twee-
zers. (Fig. S-1-6)
With Iron Wire:
(1) Using desoldering braid, remove the solder from all
pins of the flat pack-IC. When you use solder flux
which is applied to all pins of the flat pack-IC, you
can remove it easily. (Fig. S-1-3)
(2) Affix the wire to a workbench or solid mounting
point, as shown in Fig. S-1-5.
(3) While heating the pins using a fine tip soldering
iron or hot air blower, pull up the wire as the solder
melts so as to lift the IC leads from the CBA contact
pads as shown in Fig. S-1-5
To Solid
Mounting Point
CBA
Tweezers
Hot Air Blower
or
Iron Wire
Soldering Iron
Fig. S-1-5
Fine Tip
Soldering Iron
Flat Pack-IC
Fig. S-1-6
1-3-2 NOTE_1
2. Installation
(1) Using desoldering braid, remove the solder from
the foil of each pin of the flat pack-IC on the CBA
so you can install a replacement flat pack-IC more
easily.
(2) The “ I ” mark on the flat pack-IC indicates pin 1.
(See Fig. S-1-7.) Be sure this mark matches the 1
on the PCB when positioning for installation. Then
presolder the four corners of the flat pack-IC. (See
Fig. S-1-8.)
(3) Solder all pins of the flat pack-IC. Be sure that none
of the pins have solder bridges.
Example :
Pin 1 of the Flat Pack-IC
is indicated by a " " mark.
Fig. S-1-7
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 >
CBA
Presolder
Flat Pack-IC
Fig. S-1-8
CBA
< Correct >
Grounding Band
1MΩ
CBA
1MΩ
Conductive Sheet or
Copper Plate
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, TP502 (SENSOR INHIBITION) 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.
Because the Tape End Sensors are inactive, do
Note:
not run a tape all the way to the start or the end of the
tape to avoid tape damage.
About REC-Safety Switch
Caution:
The REC-Safety Switch is directly mounted on the
Main CBA. When the Deck Mechanism Assembly is
removed from the Main CBA for servicing, this switch
does not work automatically.
What to do for preparation
In order to record, press the Rec button while pushing
REC-SAFETY SW on the Main CBA. See Fig. 1.
Q503
SW506
Q504
TP502
S-INH
(REC-SAFETY SW)
Fig. 1
1-4-1 HB300PFS
Front Panel
Display Window
CHANNEL
TAPE SPEED
TIMER
TAPE INPOWER VCR/TV
VCR/TV
POWER
REC
VIDEO L AUDIO R
REW
PLAY
REC/
OTR
MENU
STOP/EJECT
PAUSE/
STILL
F.FWD
123456
78910111213141516
17 18 19 20 21
TIMER
TAPE INPOWER VCR/TV
REC
Remote Control
POWER
VCR/TV
123
456
CHANNEL
789
MENU
0 +100
SEARCH MODE
DISPLAY SLOW
PLAY
REW F.FWD
STOP
RECORD
PAUSE/STILL
EXIT
COUNTER
MEMORYRESET
EJECT
17
14
13
11
16
15
12
10
9
3
2
1
5
8
7
6
4
Rear Panel
ANT
AUDIO
VIDEO
IN
OUT
OUT IN
CH3 CH4
OUT
L
R
IN
23 24 25 26
272830
29
Front Panel
Display Window
F.FWD
PAUSE
STILL
REW
CHANNELTAPE SPEED
POWER
VIDEO L AUDIO R
VCR/TV
POWER VCR/TV TAPE IN TIMER REC
PLAY
S
T
O
P
/
E
J
E
C
T
REC
OTR
MENU
124563
1314 11 10 9 8 71216 15
17 18 19 20 21
POWER VCR/TV TAPE IN TIMER REC
Remote Control
POWER
VCR/TV
123
456
CHANNEL
789
MENU
0 +100
SEARCH MODE
DISPLAY SLOW
PLAY
REW F.FWD
STOP
RECORD
PAUSE/STILL
EXIT
COUNTER
MEMORYRESET
EJECT
17
14
13
11
16
15
12
10
9
3
2
1
5
8
7
6
4
Rear Panel
ANT
AUDIO
VIDEO
IN
OUT
OUT IN
CH3 CH4
OUT
L
R
IN
22 23 24 25
262729
28
OPERATING CONTROLS AND FUNCTIONS
EWV601A KVS600A
DESCRIPTION OF CONTROLS
1. Cassette Compartment
2. STOP/EJECT button
3. REW button
4. PLAY button
5. F.FWD button
6. PAUSE/STILL button
7. MENU button
8. REC/OTR button
17. POWER indicator
18. VCR/TV indicator
19. TAPE IN indicator
9. CHANNEL buttons
10. TAPE SPEED button
11. Display Window
12. Remote Sensor
13. VCR/TV button
14. POWER button
15. AUDIO Input jacks
16. VIDEO Input jack
20. TIMER indicator
21. REC indicator
DESCRIPTION OF CONTROLS
1. Cassette Compartment
2. STOP/EJECT button
3. REW button
4. PLAY button
5. F.FWD button
6. PAUSE/STILL button
7. MENU button
8. REC/OTR button
17. POWER indicator
18. VCR/TV indicator
19. TAPE IN indicator
9. CHANNEL buttons
10. TAPE SPEED button
11. Display Window
12. Remote Sensor
13. VCR/TV button
14. POWER button
15. AUDIO Input jacks
16. VIDEO Input jack
20. TIMER indicator
21. REC indicator
22. AC Power Cord
23. AUDIO OUT jacks
24. AUDIO IN jacks
25. ANT. IN jack
26. VIDEO OUT jack
27. VIDEO IN jack
28. CH3/CH4 selector switch
29. ANT. OUT jack
1. POWER button
2. NUMBER buttons
3. MENU button
4. DISPLAY button
5. SLOW button
6. REW button
7. STOP button
8. RECORD button
9. PAUSE/STILL button
10. F.FWD button
11. PLAY button
12.
COUNT ER/ MEMO RY
button
13. EXIT/RESET button
14. SEARCH MODE button
15. CHANNEL buttons
16. VCR/TV button
22. AC Power Cord
23. AUDIO OUT jacks
24. AUDIO IN jacks
25. ANT. IN jack
26. VIDEO OUT jack
27. VIDEO IN jack
28. CH3/CH4 selector switch
29. ANT. OUT jack
1. POWER button
2. NUMBER buttons
3. MENU button
4. DISPLAY button
5. SLOW button
6. REW button
7. STOP button
8. RECORD button
9. PAUSE/STILL button
10. F.FWD button
11. PLAY button
12.
COUNT ER/ MEMO RY
button
13. EXIT/RESET button
14. SEARCH MODE button
15. CHANNEL buttons
16. VCR/TV button
1-5-1 HB4J0IB
SSV6001A
Front Panel
Display Window
STOP/EJECT
REC/OTR
F.FWD
PAUSE/STILL
REW
POWER
VIDEO AUDIOLR
PO
W
ER
VCR/TV
VCR/TV
PLAY
REC
C
H
A
N
N
E
L
T
A
P
E
S
P
E
E
D
TAPE IN TIMER
MENU
123456
14 13 9
81116 15 10 712
POWER
VCR/TV
REC
TAPE IN TIMER
17 18 19 20 21
Remote Control
POWER
VCR/TV
123
456
CHANNEL
789
MENU
0 +100
SEARCH MODE
DISPLAY SLOW
PLAY
REW F.FWD
STOP
RECORD
PAUSE/STILL
EXIT
COUNTER
MEMORYRESET
EJECT
17
14
13
11
16
15
12
10
9
3
2
1
5
8
7
6
4
Rear Panel
ANT
AUDIO
VIDEO
IN
OUT
OUT IN
CH3 CH4
OUT
L
R
IN
22 23 24 25
262729
28
DESCRIPTION OF CONTROLS
1. Cassette Compartment
2. REW button
3. STOP/EJECT button
4. PLAY button
5 F.FWD button
6 PAUSE/STILL button
7. MENU button
8. REC/OTR button
17. POWER indicator
18. VCR/TV indicator
19. TAPE IN indicator
22. AC Power Cord
23. AUDIO OUT jacks
24. AUDIO IN jacks
25. ANT. IN jack
9. CHANNEL buttons
10. TAPE SPEED button
11. Display Window
12. Remote Sensor
13. VCR/TV button
14. POWER button
15. AUDIO Input jacks
16. VIDEO Input jack
20. TIMER indicator
21. REC indicator
26. VIDEO OUT jack
27. VIDEO IN jack
28. CH3/CH4 selector switch
29. ANT. OUT jack
1. POWER button
2. NUMBER buttons
3. MENU button
4. DISPLAY button
5. SLOW button
6. REW button
7. STOP button
8. RECORD button
9. PAUSE/STILL button
10. F.FWD button
11. PLAY button
12.
COUNT ER/ MEMO RY
button
13. EXIT/RESET button
14. SEARCH MODE button
15. CHANNEL buttons
16. VCR/TV button
1-5-2 HB4J0IB
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] Function CBA
[5] Deck Assembly
[6] Main CBA
2. Disassembly Method
REMOVAL
ID/
LOC.
No.
PART
REMOVE/*UNHOOK/
Fig.
UNLOCK/RELEASE/
No.
UNPLUG/DESOLDER
Note
(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. Release Locking Tab (L-3) and remove five Screws
(S-2). Then slowly lift the VCR Chassis Unit (Deck
Assembly, Function CBA and Main CBA) up.
2. When reassembling, solder wire jumpers as shown
in Fig. D4.
3. Before installing the Deck Assembly, be sure to
place the pin of LD-SW on Main CBA as shown in
Fig. D5. 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. D5.
[1] Top Case 1 3(S-1) -
Front
[2]
Assembly
VCR
[3]
Chassis
Unit
Function
[4]
CBA
Deck
[5]
Assembly
[6] Main CBA 4,5 ---------- -
↓
(1)
↓
(2)
2 *3(L-1),*4(L-2) -
3 *(L-3), 5(S-2) 1
4 Desolder -
4,5 3(S-3), Desolder 2,3
↓
(3)
↓
(4)
(S-1)
[1] Top Case
↓
(5)
Fig. D1
1-6-1 HB300DC
(L-2)
[2] Front
Assembly
(L-1)
(S-2)
(L-2)
Fig. D2
[5] Deck Assembly
(S-3)
FE Head
(S-3)
Cylinder
Assembly
AC Head
Assembly
[3]VCR
Chassis Unit
(S-2)
Desolder
Desolder
[4] Function C.B.A.
From
FE Head
Lead with
white stripe
Lead connections of Deck Assembly and Main CBA
From
Cylinder
Assembly
Lead with
white stripe
TOP VIEW
From
AC Head
Assembly
[6] Main C.B.A.
(S-3)
From
Capstan Motor
Assembly
Lead with
red stripe
Fig. D4
(L-3)
Fig. D3
1-6-2 HB300DC
Pin
[6]Main C.B.A.
[5]Deck Assembly
SW507
LD-SW
Cam Gear
LD-SW
Shaft
Hole
Hole
Pin
[6]Main C.B.A.
Fig. D5
1-6-3 HB300DC
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).
CH1
CH2
Figure 1
EXT. Syncronize Trigger Point
1.0H
Switching Pulse
6.5H
V-Sync
0.5H
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 (FL8A)
Head Switching Position Adjustment
Purpose:
To determine the Head Switching point during
playback.
Symptom of Misadjustment:
May cause Head Switching noise or vertical jitter
in the picture.
Test point Adj.Point Mode Input
TP751(V-OUT)
TP302(RF-SW)
J177(GND)
Tape
VR501
(Switching Point)
(MAIN CBA)
Measurement
Equipment
PLAY
(SP)
Spec.
-----
Reference Notes:
Play back the Alignment tape and adjust VR501 so
that the V-sync front edge of the CH1 video output
waveform is at the 6.5H(412.7
from the rising edge of the CH2 head switching pulse
waveform.
s) delayed position
µ
FL8A Oscilloscope
Connections of Measurement Equipment
TP751
Main CBA
J177
TP302
6.5H±1H
(412.7µs±60µs)
Oscilloscope
CH1 CH2
Trig. (+)
1-7-1 U25NEA
Servo/System Control Block Diagram BLOCK DIAGRAMS
(DECK ASSEMBLY)
AC HEAD ASSEMBLY
CONTROL
HEAD
CL504
5 CTL(+)
6 CTL(-)
MAIN CBA
TP303
CTL
Q504
ST-S
SENSOR CBA
Q503
END-S
SENSOR CBA
IC301
(Y/C PROCESS)
CONTROL
AMP
9 23 19
18
TP506 TP505
ST-S
T-REEL
Q506
T-REEL
D555
S-LED
AL+5V
SW507
LD-SW
TIMER+5V
VR501
SW-POINT
AL+5V
RS501
REMOTE
SENSOR
Q501
RESET
AL+5V
IC501
(SERVO/SYSTEM CONTROL)
KEY- 1
KEY- 2
REMOCON-IN
1
PB-CTL
54
REC-CTL(-)
20
19
REC-CTL(+)
LD-SW74
75
ST-S
68
END-S
T-REEL
49
RESET
34
PG-DELAY
71
REC LED
TIMER LED
CAS-IN LED
VCR/TV LED 93
I2C-BUS-CLK
I2C-BUS-DATA
Hi-Fi-CLK
Hi-Fi-DATA
Hi-Fi-H-SW
Hi-Fi-CS
Hi-Fi/NOR-IN
ST/SAP-IN
72
73
83
84
88
10
11
12
18
65
67
FUNCTION CBA
TP502
S-INH
KEY
SWITCH
P-ON+9V
9
8
CL507 CN651
3 1KEY 2
D595 P-ON
D596 REC
D597 TIMER
D598 CASS
D599 VCR/TV
WF10
WF11
TU701(TUNER UNIT)
CLOCK
11
DATA
12
Hi-Fi-CLK
Hi-Fi-DATA
Hi-Fi-H-SW
Hi-Fi-CS
NORMAL-H
ST/SAP-MODE
A-MUTE-H
KEY SWITCH
FROM/TO
Hi-Fi AUDIO
BLOCK
CYLINDER ASSEMBLY
PG
SENSOR
DRUM
MOTOR
M
MOTOR
AL+5V
CAPSTAN MOTOR
CAPSTAN
MOTOR
M
CL502
1 C-F/R
2 AL+12V
3 AL+12V
P-ON+5V
4
GND
5
C-FG
6
C-CONT
7
GND
8
D-FG
9
LM-FWD/REV
10
D-CONT
11
D-PG
12
AL+12V
AL+12V
P-ON+5V
SW506
REC SW
MLOADING
REC-SW
25
C-F/R
48
51
C-FG
C-CONT
55
D-FG
52
LM-FWD/REV
59
D-CONT56
D-PG
53
A-MUTE-H
D-REC-H
D-PB-H
INSEL/ST-SL
C-SYNC
D-V SYNC
V-ENV
C-ROTA
RF-SW
TRICK/C-G/APC
SP/LP/SLP
BLUEBACK-ON
H-A-SW
H-A-COMP
PICTURE-SEL
P-ON-L
P-DOWN-L
13
62
61
21
33
70
15
17
47
45
66
16
14
44
60
63
A-MUTE-H
D-REC-H
D-PB-H
D-REC-H
D-PB-H
7
INSEL/ST-SL
C-SYNC
D-V SYNC
V-ENV
C-ROTA
RF-SW
TRICK/C-G/APC
SP/LP/SLP
BLUEBACK-ON
H-A-SW
H-A-COMP
PICTURE-SEL
P-ON-L
P-DOWN-L
TO AUDIO
BLOCK
FROM/TO
VIDEO BLOCK
FROM/TO
POWER
SUPPLY
BLOCK
1-8-1 1-8-2 HB4J0BLS
Video Block Diagram
TP751
WF1
V-OUT
JK751
V-OUT
Q391
BUFFER
NOTE: The Tuner Unit (TU701) is either type A or type B.
Wave Form will be different. It depends on the type
of tuner used on the unit you are servicing.
REC VIDEO SIGNAL PB VIDEO SIGNAL MODE: SP/REC
MAIN CBA
TYPE B
TU701
VIDEO-IN
VIDEO-OUT
TYPE A
TU701
VIDEO-IN
VIDEO-OUT
JK752
REAR V-IN
JK753
FRONT V-IN
FROM/TO
SERVO/SYSTEM
CONTROL BLOCK
18
24
IC301
(Y/C PROCESS)
35
WF9
6
J194
WF14
WF9
6
IC501
OSD-
CHARA-OUT
OSD-
BLUEBACK
30
3131
30
BLUEBACK
6dB
AMP
CHARA
MIX
FBC
45 47 49 44
CCD 1H
DELAY
DOC YNR Y/C COMB
WF14
Y/C
MIX
CHROMINANCE
SIGNAL PROCESS
INSEL/ST-SL
D-PB-H
D-REC-H
TRICK/C-G/APC
C-SYNC
C-ROTA
D-V SYNC
SP/LP/SLP
BLUEBACK-ON
PICTURE-SEL
TUNER
42
REAR
38
40
FRONT
71
16
REC/EE/PB
D-REC-H
11
TRICK/C-G/APC
73
34
C-ROTA
14
D-V SYNC
39
SP/LP/SLP
59
BLUEBACK-ON
41
PICTURE-SEL
36
V-AGC
SYNC
SEPA
R P
R
P
Q301
BUFFER
LUMINANCE
SIGNAL PROCESS
AGC
AMP
(DECK ASSEMBLY)
CYLINDER ASSEMBLY
VIDEO (R)-1 HEAD
VIDEO (L)-1 HEAD
VIDEO (L)-2 HEAD
VIDEO (R)-2 HEAD
CL253
1
2
3
4
5
6
V(R)-1
V-COM
V(L)-1
V(L)-2
V-COM
V(R)-2
91
90
89
88
85
84
83
82
R
L
SP
EP
L
R
HPF
ENV
DET
74
R
P
TP302
RF-SW
FROM/TO
SERVO/SYSTEM
CONTROL BLOCK
WF2
RF-SW
V-ENV
H-A-SW
H-A-COMP
13
93
15
H-A-COMP
94
TP301
C-PB
WF5
1-8-3 1-8-4 HB4J0BLV
Audio Block Diagram
NOTE: The Tuner Unit (TU701) is either type A or type B.
Wave Form will be different. It depends on the type
of tuner used on the unit you are servicing.
PB-AUDIO SIGNAL REC-AUDIO SIGNAL Mode : SP/REC
TYPE B
TYPE A
REAR
FRONT
TU701
SIF OUT
AUDIO-IN
TU701
SIF OUT
AUDIO-IN
A-OUT (R)
A-OUT (L)
A-IN (L)
A-IN (R)
A-IN (L)
A-IN (R)
(DECK ASSEMBLY)
JK751
JK752
JK754
JK755
15
22
J192
WF8
2
WF8
2
TP753
A-OUT(R)
TP754
A-OUT(L)
MAIN CBA
IC301
(AUDIO PROCESS) 76
4
EQ
AMP
SP/LP-ON
3
1
2
100
ALC
R
SIF
N-A-OUT
MOD-A
A-OUT (R)
A-OUT (L)
A-IN (L)
A-IN (R)
A-IN (L)-F
A-IN (R)-F
N-A-IN
LINE
AMP
P
MUTE
96
FROM/TO
Hi-Fi AUDIO
BLOCK
AUDIO
HEAD
AUDIO
ERASE
HEAD
FULL
ERASE
HEAD
AC HEAD ASSEMBLY
FE HEAD
CL504
4 A-PB/REC
3 A-COM
1 AE-H
2 AE-H/FE-H
CL501
1 FE-H
2 FE-H-GND
Q422
BIAS
OSC
Q426
(PB=ON)
Q425
Q421
P-ON+5V
SWITCHING
D-REC OFF
P-ON+5V
99
AUTO
BIAS
6
7
REC
AMP
D-REC-H
11 12
REC/EE/PB
16
98
D-PB-H
A-MUTE-H
D-REC-H
FROM
SERVO/SYSTEM
CONTROL BLOCK
1-8-5 1-8-6 HB4J0BLA
Hi-Fi Audio Block Diagram
SIF
IC451 (MTS/ SAP/ Hi-Fi AUDIO PROCESS/ Hi-Fi HEAD AMP)
NOISE
DET
57
SIF
DEMOD
SAP
FILTER
STEREO
FILTER
PILOT
DET
SAP
DEMOD
PILOT
CANCEL
L-R
DEMOD
MAIN CBA
ST/SAP
SW
DC
dBX
DEC
MATRIX
SERIAL
DATA
DECODER
RIPPLE
FILTER
REC-AUDIO SIGNALPB-AUDIO SIGNAL Mode : SP/REC
37
38
39
54
P-ON+9V
Hi-Fi-CS
Hi-Fi-DATA
Hi-Fi-CLK
FROM/TO
SERVO/ SYSTEM
CONTROL BLOCK
FROM/TO
AUDIO BLOCK
A-IN(R)
A-IN(R)-F
N-A-OUT
A-IN(L)
A-IN(L)-F
69
71
STEREO
PLL
R-CH
PNR
R-CH
INSEL
6
7
9
NOR
SW
L-CH
INSEL
48 47
13 14
P
R
SW
NOISE
LIM DEV
COMP
VCO
HOLD
PULSE
NOISE
DET
LPF
MATRIX
R-CH BPF
OUTPUT
SELECT
COMP
ALC
BO
DET
MUTE
ENV
DET
MODE
OUT
51
23
80
78
77
40
49
26
ST/SAP-MODE
NORMAL-H
4
2
1
N-A-IN
A-OUT (L)
MOD-A
A-OUT (R)
Hi-Fi-H-SW
A-MUTE-H
TO SERVO/SYSTEM
CONTROL BLOCK
TO AUDIO BLOCK
FROM/TO
SERVO/SYSTEM
CONTROL BLOCK
CYLINDER
ASSEMBLY
LPF
L-CH BPF
AGC
AGC
DET
31 30
R
L
24
27
CL253
Hi-Fi-A(R) 7
Hi-Fi-COM 8
Hi-Fi-A(L) 9
Hi-Fi
AUDIO
(R) HEAD
Hi-Fi
AUDIO
(L) HEAD
L-CH
PNR
R
P
LIM DEV
SW
NOISE
VCO
COMP
HB4J0BLH1-8-7 1-8-8
Power Supply Block Diagram
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
HOT CIRCUIT. BE CAREFUL.
F
A V
AC001
F001
1A 250V
L001
LINE
FILTER
D001 - D004
BRIDGE
RECTIFIER
F
A V
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE FUSE.
ATTENTION : POUR UNE PROTECTION CONTINUE LES RISQES
D'INCELE N'UTILISER QUE DES FUSIBLE DE MEMO TYPE.
RISK OF FIRE
"This symbol means fast operating fuse."
"Ce symbole reprèsente un fusible à fusion rapide."
-REPLACE FUSE AS MARKED.
T001
2
4
11
12
18
Q052
CAUTION !
Fixed voltage 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.
AL+12V
AL+44V
AL+12V
P-ON-L
P-ON+9V
TIMER+5V
AL+5V
P-ON+5V
P-DOWN-L
HOT
Q002
Q001
J190
7
6
IC001
ERROR
VOLTAGE DET
4
1
23
13
Q055
14
Q056
Q065
15
16
17
(SHUNT REGULATOR)
Q031
REG
COLD
MAIN CBA
HB4J0BLP1-8-9 1-8-10
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
Model: EWV601A
POWER VCR/TV TAPE IN TIMER REC
Model: SSV6001A
Model: KVS600A
TAPE INPOWER VCR/TV
Led Mode Indicator Active
POWER Power on = " H "
VCR/TV VCR mode = " H "
TAPE IN
1. When reel and capstan mechanism is
not functioning correctly
2. When tape loading mechanism is not
functioning correctly
3. When cassette loading mechanism is
not functioning correctly
4. When the drum is not working properly
TIMER
REC
Power off = " L "
TV mode = " L "
Cassette in = " H "
Cassette out = " L "
Cassette in
Cassette in
Cassette in
Cassette in
POWER
VCR/TV
TAPE IN TIMER
REC
" H "= LED Light on, " L "= LED Light off
Blinks at 0.8Hz interval
Blinks at 1.6Hz interval
Blinks at 3.2Hz interval
Blinks at 6.4Hz interval
TIMER Timer stand by = " H "
One touch recording = " H "
Timer recording = " H "
General mode = " L "
REC REC mode = " H "
REC pause
General mode = " L "
1-8-11 HB4J0FIS
Blinks at 0.8Hz interval
Power Supply Trouble Shooting Guide
It is highly recommended that a variable isolation
transformer which can monitor current be used.
(Alternatively a variable AC source which monitors current will do). Read directions below before
power is added!
Repair method
CHECK
Connect unit to the isolation transformer and slowly increase the AC supply while monitoring the current, if it
draws too much current (Be ware fuse
is rated for 1.0 amps), then turn off
supply and do repair method #1.
NO
Check whether the primary rectifying
DC of the Switching power supply has
an output. (Reading should be about
168V.)
YES
With the primary DC working check
the secondary 5V.
YES
Are the 40V, 12V, -30V, 5V and
filaments lines higher than normal?
NO
Although the secondary 5V is working,
are any of the other voltages higher
than normal (40V, 12V, -30V and
filament voltages)?
NO
There is no problem on the SW power
supply.
YES
NO
NO
YES
YES
#1
#2
#3
#4
#5
Repair method #1
(Power must be off)
Short circuit in the secondary side. check diode D013
and {(FIP display model only: D012, D015, D016 and
D017) or (LED display model only: D014, D015 and
D016)}, switching FET (Q001), control transistor
(Q002), diode (D006), and resistor (R014) replace as
necessary.
Disconnect 40V diode (D013), 12V diode (D015), 5V
diode (D016) and {FIP display model only: -30V diode
(D012) and filament voltage diode (D017)}Check the
load continuity of 40V line, 12V line, 5V line, -30V line
and filament voltage line through a tester (resistance
range).
If the tester indicates a lower resistance value around
0 ohm, the line is short-circuited.
Before repairing the switching power supply, find out
the short-circuited area of such line and repair it.
If the tester does not indicate any low resistance value
(around 0 ohm), no load is short-circuited and there is
no problem.
2] Check for any defective parts while the secondary
rectifying diodes are disconnected (D013, D015, D016
and {FIP display model only: D012 and D017)} perform a diode check in both forward and reverse directions through a tester.
3] Remove the following components and check for
defects: snubber diode (D051), switching FET (Q001),
source resistor (R014), control transistor (Q002).
Repair method #2
Check the fuse 1.0A (F001), primary rectifying diodes
(D001-D004) as possible problems. Remove the
above mentioned parts and check them. The circuit
which turns on switching FET (Q001) may be
regarded as a possible cause, even if the load at the
secondary side is shorted, it can't be detected
because switching FET (Q001) isn't operating. Perform check according to the step 1 and 2 of repair
method #1 and check the following parts:
(Remove the part from PCB)
Switching FET (Q001), source resistor (R014), gate
resistor (R008) and start resistor (R004 and R005).
Repair method #3
A circuit to turn on switching FET (Q001) may not work
and this may be regarded as a cause of trouble. Even
if the load at the secondary side is short-circuited, it
cannot be detected because switching FET (Q001)
does not turn on. Therefore, perform check according
to the steps 1] and 2] of the repair method #1 and execute the under-mentioned parts breakage check.
(Remove the part from PCB.)
switching FET (Q001), source resistor (R014), control
transistor (Q002), gate resistor (R008) and start resistor (R004 and R005).
Repair method #4
The feedback circuit which is monitored by the output
of voltage may not work and this may be regarded as
a possible cause, remove control transistor Q002 and
check for defects. More over, a photo coupler (IC001)
and transistor (Q031) may be defective, replace any
defective parts with factory originals.
Repair method #5
If the output voltage of the secondary side is slightly
high, the line load may be in the "OPEN" state and this
may be regarded as a cause of trouble. If there is no
output voltage on the secondary side, the rectifying
diodes (D013), (D015) and {FIP display model only
only: (D012) and (D017)} may be defective.
1-8-12 U25TRB_4H
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
change rate
Standard
temperature
Temperature
range
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
3
(K=10
3. Resistor wattages are 1/4W or 1/6W unless otherwise specified.
4. All capacitance values are indicated in µF
(P=10
5. All voltages are DC voltages unless otherwise
specified.
, M=106).
-6
µF).
(B)
(F) +30 - 80% 20°C -25~+85°C
(SR)
(Z) +30 - 80% 20°C -10~+70°C
Capacitors and transistors are represented by the following symbols.
±
±
10%
15%
20°C -25~+85°C
20°C -25~+85°C
CBA Symbols
(Top View) (Bottom View)
+
Electrolytic Capacitor
(Bottom View)
Transistor or Digital Transistor
E C B
(Top View)
(Top View)
Schematic Diagram Symbols
Digital Transistor
E C B
(Top View)
E C B
NPN Transistor
NPN Digital Transistor
PNP Transistor
E C B
(Top View)
PNP Digital
Transistor
E C B
1-9-1 SC_03
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.
F
A V
2.
CAUTION:
ATTENTION: POUR UNE PROTECTION CONTINUE LES RISQES D'INCELE N'UTILISER QUE
DES FUSIBLE DE MEMO TYPE.
RISK OF FIRE-REPLACE FUSE AS MARKED.
This symbol means fast operating fuse.
Ce symbole represente un fusible a fusion rapide.
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. Wire Connectors
(1) Prefix symbol "CN" means "connector" (can disconnect and reconnect).
(2) Prefix symbol "CL" means "wire-solder holes of the PCB" (wire is soldered directly).
5. Mode: SP/REC
6. Voltage indications for PLAY and REC modes on the schematics are as shown below:
Unit: Volts
5.0
231
5.0
PLAY mode
REC mode
(2.5)
The same voltage for
both PLAY & REC modes
Indicates that the voltage
is not consistent here.
7. How to read converged lines
1-D3
3
Distinction Area
Line Number
(1 to 3 digits)
2
Examples:
1. "1-D3" means that line number "1" goes to area "D3".
1
2. "1-B1" means that line number "1" goes to area "B1".
ABCD
8. Test Point Information
AREA D3
1-B1
AREA B1
1-D3
: Indicates a test point with a jumper wire across a hole in the PCB.
: Used to indicate a test point with a component lead on foil side.
: Used to indicate a test point with no test pin.
: Used to indicate a test point with a test pin.
1-9-2 SC_09
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