CCE VCR-505 Diagram
MANUAL TÉCNICO
VCR-505
2
1. Before returning the instrument to the customer always make
a safety check of the entire instrument including but not limited
to the following items.
a. Be sure that no built-in protective devices are defective
and/or have been defeated during servicing (1) Protective
shields are provided on this instrument to protect both the
technician and the customer. Correctly replace all missing
protective shields. including any removed for servicing convenience. (2) When reassembling the instrument be sure to
put back in place all protective device including but not limited to nonmetallic control knobs insulating fishpapers
adjustment and compartment covers/shields and isolation
resistor capacitor networks. Do not operate this instru-
ment or permit it to be operated without all protective
devices correctly installed and functioning. Servicers
who defeat safety features or fail to perform safety
checks may be liable for any resulting damage, and may
expose themselves and others to possible injury.
b. Be sure that there are no cabinet openings through which an
adult or child might be able to insert their fingers and contact a hazardous voltage. Such openings include but are not
limited to (1) excessively wide cabinet ventilation slots and
(2) improperly fitted and/or incorrectly secured cabinet covers.
c. Leakage Cold Check – With the instrument AC plug
removed from any AC source, connect an electrical jumper
across the two AC plug prongs. Place the instrument AC
switch in the on position. Connect one lead of an ohmmeter
to the AC plug prongs tied together and touch the other
ohmmeter lead in turn to each push button/customer control
exposed metal screws, metalized overlays and to each
cable connector. If the measured resistance is less than 1.0
megohm or greater than 5.2 megohm an abnormality exists
that must be corrected before the instrument is returned to
the customer. Repeat this test with the AC switch in the off
position.
AC Leakage Test
d. Leakage Current Hot Check
On completely assembled instrument, plug the AC line cord
directly into a 120V AC outlet. (Do not use an isolation transformer during this test). Use a leakage current tester or a
metering system that complies with American National
Standards Institute (ANSI) C101.1 Leakage Current for
Appliances and Underwriters Laboratories (UL) 1410, (59.7).
Measure for current from a known earth ground (metal
waterpipe, conduit, etc.) to all exposed metal or conductive
parts of the instrument (antenna connections, handle bracket, metal cabinet, screwheads, metallic overlays, push-buttons, control shafts, etc.) especially any exposed metal parts
that ofter an electrical return path to the chassis. Any current
measured must not exceed 0.5 milliamp. Reverse the instrument power cord plug in the outlet and repeat the test.
ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD
THAT MUST BE ELIMINATED BEFORE RETURNING THE
INSTRUMENT TO THE CUSTOMER OR BEFORE CONNECTING TO ANTENNA OR ACCESSORIES.
e. Interconnected Equipment AC Leakage Test
Avoid shock hazards The instrument, accessory or cable(s)
to which this instrument is connected should have the
applicable sections of the leakage resistance cold check
and the leakage current hot check performed Do not connect this instrument to an antenna cable or accessory that
exhibits excessive leakage currents.
2. Read and comply with all caution and safety-related notes on or
inside the instrument cabinet and on the chassis.
3. Design Alteration Warning – Do not alter or add to the mechan-
ical or electrical design of this instrument. Design alterations
and additions, including, but not limited to circuit modifications
and the addition of items such as auxiliary audio output connections cables and accessories etc might alter the safety characteristics of this instrument and create a hazard to the user
Any design alterations or additions will void the manufacturer's
warranty and will make you the servicer responsible for personal injury or property damage resulting therefrom.
4. Observe original lead dress Take extra care to assure correct
lead dress in the following areas a near sharp edges b near
thermally hot parts – be sure that leads and components do not
touch thermally hot parts and c the AC supply Always inspect in
all areas for pinched out-of-place or frayed wiring Do not
change spacing between components and between components and the printed-circuit board Check AC power cord for
damage.
5. Components parts and/or wiring that appear to have overheated
or are otherwise damaged should be replaced with components, parts, or wiring that meet original specifications.
Additionally determine the cause of overheating and/or damage
and if necessary take corrective action to remove any potential
safety hazard.
6. PRODUCT SAFETY NOTICE – Many electrical and mechanical
parts have special safety-related characteristics some of 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 in this service
data by a star (¡ ) on schematics and a (¡ ) in the parts list. Use
of a substitute replacement that does not have the same safety
characteristics as the recommended replacement part in this
service data parts list might create shock, fire, and/or other
hazards. Product Safety is under review continuously and new
instructions are issued whenever appropriate. For the latest
information, always consult the appropriate current service literature.
DEVICE
UNDER
TEST
TEAKAGE
CURRENT
TESTER
TEST ALL
EXPOSED METAL
SURFACES
2WIRE CORD
ALSO TEST WITH
PLUG REVERSED
DSING AC ADAPTER
PCUG AS REOUIRED
EARTH
GROUND
READING SHOULD
NOT BE ABOVE
0.5mA
SAFETY PRECAUTIONS
3
Power Input: 90~260 Volts AC 60Hz
Power Consumption: 14 Watts (4-head Hi-Fi)
13 Watts (4-head)
Operating Temperature: 5 degree C to 35 degree C
(41 degree F to 95 degree F)
Storage Temperature: -20 degree C to 60 degree C
(-4 degree F to 140 degree F)
Weight: 5.5 kg
Dimensions: 360mm Wide X 90mm High X
312mm Deep
Recording System:
4-head Hi Fi: Four video record/playback
heads
Rotary helical scan/luma: FM
recording/chroma: down
converted
subcarrier phase shifted
recording
Two audio record/playback
heads
Rotary helical scan, 2 channels
FM recording
4-head: Four video record/playback
heads
Rotary helical scan/luma: FM
recording/chroma: converted
subcarrier phase shifted recording
Video Signal: PAL-M/NTSC-M
Antenna: 75 ohm input impedance
Video Signal Level: 1Vp-p (140 IRE standard)
Audio Input Impedance: 47k ohms
Audio Output
Impedance: Less than 1.0k ohm
Tape Speed: SP: 33.35mm/sec.
SLP: 11.13mm/sec
Maximum Recording Time: T-60: 3 hours/SLP mode
T120: 6 hours/SLP mode
Fast Forward/Rewind Time: 3 minutes (T-120 tape)
Tuning System: Auto Program/Cable
Compatible/Frequency
Synthesis (FS)
Note: Specifications are subject to change without notice.
SPECIFICATIONS
Cleaning and Lubrication
A. Cleaning the Tape Transport System
The following parts should be cleaned after every 500 hours
of use.
• TENSION POLE
• S-GUIDE POST
• FE HEAD
• S GUIDE ROLLER
• S-SLANT POLE
• VIDEO HEAD/DRUM
• T-SLANT POLE
• T-GUIDE ROLLER
• AC HEAD/AE HEAD
• T-GUIDE POST
• CAPSTAN SHAFT
• PINCH ROLLER
Note: After cleaning with alcohol, allow the parts to dry thor-
oughly before using a cassette tape.
B. Cleaning the Drive System
The following parts should be cleaned after every 500 hours
of use.
• REEL TABLE
• T MAIN BRAKE
• S MAIN BRAKE
• T MAIN BRAKE
• CAPSTAN FLYWHEEL/PULLEY
• REEL PULLEY
C. Lubrication points
The following parts should be cleaned and lubricated after
every 500 hours of use. Apply one (1) or two (2) drops of oil.
Refer to the "Replacement Parts List" for the stock number of
the recommended oil.
• S REEL TABLE POST
• T REEL TABLE POST
• IDLER PULLEY
CLEANING AND LUBRICATION
4
AC Millivolt Meter
Sensitivity: 1.0mVAC–400VAC
Dual-Trace Triggered Oscilloscope–with Lo–Cap (X10)
and Direct Probes.
Response: DC–20MHz
Sensitivity: 5mV/div.
Max. Sweep Rate: 0.1µsec./div.
Frequency Counter–7 digits
Sensitivity: 25mV-5V
Range: 50Hz–100MHz
DVM
Range: 0.1VDC–1000VD
Accuracy: 0.5%
PAL-M/NTSC Video Signal Generator–Must provide 1V p-p
negative sync video across a 75 ohm load and produce standard
PAL-M/NTSC 75% saturated color bars with a 100% white
window.
DC Power Supply
Range: 0-50V, 2A well filtered.
Temperature Controlled Soldering Station–Grounded tip
(Tip temperature: 500°F-600°F).
Note: 500 °F Maximum for leadless components.
AC Variac–Continuously variable.
TEST EQUIPMENT REQUIREMENTS
THE LOCATION OF THE "SSN LABEL"
The Location of the "SSN Label"
THE SERVICE FIXTURE
Cable 1 Cable 2 Cable 3 Path Adj Fixture Special Driver
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FIXTURE ITEM DESCRIPTION
Extension Cable 1 Use for K mecha Drum Motor Connecting Cable
Extension Cable 2 Use for K mecha Capstan Motor connecting Cable
Extension Cable 3 Use for K mecha A/C head and L/C Motor Connecting Cable
Path Adj Fixture Use for X-position adjust/Tape path alignment
Special Driver Use for X-position adjust/Tape path alignment
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EXTENSION CABLE CONNECTION
7
NOTE: PLACING THE UNIT IN THE SERVICE MODE
Service option
For this chassis, the sensors (start/end/reel) are located on the MAIN circuit board, not in the DECK assembly. There is an important
service option that has to be followed to repair the MAIN circuit board with the DECK assembly connected. To imitate the function of
the sensors, insert the SVC Mode Diode wire (D723) on the MAIN circuit board as shown below.
LOGIC PCB (FRONT SIDE)
PATH FIXTURE CONNECTION/TEST POINT IDENTIFICATION
Refer to the adjustment of the tape transporting system.
Connect to PT01,
!pin-^pin of the
MAIN CIRCUIT BOARD.
CTL pulse test point
GND
S/W pulse test point
ENVE pulse test point
!
^
8
Top Cover Removal(Fig. 1)
1. Remove three screws(A) holding the top cover.
2. Remove four screws(B) holding the top/botton cover.
3. Carefully lift the back of the top cover and slide it to the rear
to remove it.
Front Panel Removal(Fig. 2)
1. Continued from (Fig. 1).
2. Remove two screws securing front panel & F/L bracket.
3. Remove the F/L brackat.
4. Release three bottom tabs holding the front panel.
5. Remove the front panel.
Bottom Cover Removal(Fig. 3)
1. Remove top cover and front panel.
2. Remove four screws.
3. Lift out the bottom cover in the direction of the arrow.
F/L Door Removal(Fig. 4)
1. Open the F/L door 90 degrees.
2. Remove the F/L door in the direction of the arrow.
Fig. 1 - Top Cover Removal
Fig. 3 - Bottom Cover Removal
Fig. 2 - Front Panel Removal
Fig. 4 - F/L Door Removal
INSTRUMENT DISASSEMBLY
Perform all disassembly procedures in the order presented. When reassembling, use the renerse procedure. Make sure that all
leads/wiring are routed correctly when reassembling.
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PCB Preamp Assembly Removal(Fig. 5)
1. Remove top cover and front panel.
2. Disconnect connectors (A,B,C).
3. Remove two(2) tabs (B) holding the PCB logic assembly.
4. Tilt the PBC Logic Assembly forward and remove it in the
direction of the arrow.
COVER Preamp Removal(Fig. 6)
1. Remove top cover, bottom cover and front panel.
2. Remove one screw (A).
3. Remove the cover preamp in the direction of the arw.
4. Disconnect the FPC (B).
Deck Assembly Removal(Fig. 7)
1. Remove top cover, bottom cover, front panel.
2. Disconnect three connectors (A) (B) (C).
3. Remove three screws (D).
4. Pull out the Deck Assembly in the direction of the arrow.
Main PCB Assembly Removal(Fig. 8)
1. Remove top cover, bottom cover, front panel.
2.Remove three screws (A).
3. Release three tabs (B) and lift out the Main PCB in the
direction of the arrow.
Fig. 5 - PCB Preamp Assembly Removal
Fig. 6 - COVER Preamp Removal
Fig. 7 - Deck Assembly Removal
Fig. 8 - Main PCB Removal
INSTRUMENT DISASSEMBLY (Continued)
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ELECTRICAL ADJUSTMENT
Fig. 1 - Circuit Board Location
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ELECTRICAL ADJUSTMENTS (Hi-Fi MODEL)
FRONT
A/V JACK
DECK ASSEMBLY
PT01
POWER
SUPPLY
#3
SW30Hz
R199
STEREO
SEPARATION
PG
SHIFTER
R599
Fig. 2 - Main board test point/control location guide (Component)
ƒRConnect the Fixture (6pin) to ! pin–^pin of PT01
ƒR
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