CrossWood F5000M Service Manual
SERVICE MANUAL
VIDEO CASSETTE RECORDER
F5000M
Sec. 1: Main Section
I Specifications
I Preparation for Servicing
I Adjustment Procedures
I Schematic Diagrams
I CBA’s
I Exploded views
I Parts List
Sec. 2: Deck Mechanism Section
I Standard Maintenance
I Alignment for Mechanism
I Disassembly/Assembly of Mechanism
I Alignment Procedures of Mechanism
I Deck Exploded Views
I Deck Parts List
PAL
MAIN SECTION
VIDEO CASSETTE RECORDER
F5000M
TABLE OF CONTENTS
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1-1
Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2-1
Standard Notes for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3-1
Preparation for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4-1
Cabinet Disassembly Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5-1
Electrical Adjustment Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6-1
Block Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-1
Function Indicator Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-5
Schematic Diagrams / CBA’s and Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8-1
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9-1
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10-1
IC Pin Function Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11-1
Lead Identifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12-1
Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13-1
Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14-1
Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15-1
Sec. 1: Main Section
I Specifications
I Preparation for Servicing
I Adjustment Procedures
I Schematic Diagrams
I CBA’s
I Exploded Views
I Parts L ist
1-1-1 HG240SP
SPECIFICATIONS
Note: Nominal specs represent the design specs. All units should be able to approximate these – some will exceed
and some may drop slight ly below the se specs. Li mit specs represe nt the abs olute worst conditio n that st ill mig ht
be considered acceptable; In no case should a unit fail to meet limit specs.
Description Unit Minimum Nominal Maximum Remark
1. Video
1-1. Video Output (PB) Vp-p 0.8 1.0 1.2 FL6A
1-2. Video Output (R/P) Vp-p 0.8 1.0 1.2
1-3. Video S/N Y (R/P) dB 40 45
SP Mode,
W/O Burst
1-4. Video Color S/N AM (R/P) dB 37 41 SP Mode
1-5. Video Color S/N PM (R/P) dB 30 36 SP Mode
1-6. Resolution (PB) Line 230 245 SP Mode
2. Servo
2-1. Jitter Low µsec 0.07 0.12 SP Mode
2-2. Wow & Flutter % 0.3 0.5 SP Mode
3. Normal Audio
3-1. Output (PB) dBV -9 -6 -3 SP Mode
3-2. Output (R/P) dBV -9 -6 -1.5 SP Mode
3-3. S/N (R/P) dB 36 41 SP Mode
3-4. Distortion (R/P) % 1.0 4.0 SP Mode
3-5. Freq. resp (R/P) at 200Hz dB -7 -4 SP Mode
(-20dB ref. 1kHz) at 6kHz dB -10 -4 SP Mode
4. Tuner
4-1. Video output Vp-p 0.8 1.0 1.2 E-E Mode
4-2. Video S/N dB 39 42 E-E Mode
4-3. Audio output dB -10 -6 -2 E-E Mode
4-4. Audio S/N dB 40 46 E-E Mode
1-2-1 U29PSFP
IMPORTANT SAFETY PRECAUTIONS
Product Safe t y 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 characteri stic s are ide ntified 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 haz ards. 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 produ ct safety and electrical co des of
the countries in which they are to be sold. However, in
order to maintain such com plian ce, it is eq ually impor tant to implement the following precautions when a set
is being serviced.
Precautions during Servicing
A. Parts identified by the ! symbol are critical for
safety. Replace only with part number specified.
B. In addition to safety, other parts and assemblies
are specified for conformance with regulations
applying to spu riou s radiation . These must al so be
replaced only with specified replacements.
Examples: RF converters, RF ca bles, 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 wi res do no t contact heat produc-
ing parts (heat sink s, oxide metal film resisto rs, fusible resistors, etc.).
G. Check that replaced wires do not contact sharp
edges or pointed parts.
H. When a power cord h as been replaced , check tha t
5 - 6 kg of force in any direction will not loosen it.
I. Also check areas surrounding repa ir ed loc at ion s.
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 m m of the insulat ion 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, dis connect the AC plug from the
AC outlet.
1-2-2 U29PSFP
Safety Check after Servicing
Examine the area surrounding the repaired location for
damage or deter ioration. Observe that screws, par ts,
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 clearanc e distance (d) and (d’) between so ldered terminals, and between terminals and surrounding metallic parts. (See Fig. 1)
Table 1 : Ratings for selected area
Note: This table is unofficial and for reference only.
Be sure to confirm the precise values.
2. Leakage Current Test
Confirm the specified (or lower) leakage current
between B (earth ground, power cord plug prongs)
and externally exposed accessible parts (RF 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 ter minals of load
Z. See Fig. 2 and the following table.
AC Line Voltage Clearance Distance (d), (d’)
220 to 240 V
≥ 3mm(d)
≥ 6 mm(d’)
Chassis or Secondary Conductor
dd'
Primary Circuit Terminals
Fig. 1
AC Voltmeter
(High Impedance)
Exposed Accessible Part
B
One side of
Power Cord Plug Prongs
Z
Fig. 2
Table 2: Leakage current ratings for selected areas
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
AC Line Voltage Load Z Leakage Current (i)
One side of power cord plug
prongs (B) to:
220 to 240 V
2kΩ RES.
Connected in
parallel
i≤0.7mA AC Peak
i≤2mA DC
RF or
Antenna terminals
50kΩ RES.
Connected in
parallel
i≤0.7mA AC Peak
i≤2mA DC
A/V Input, Output
1-3-1 NOTE_1
STANDARD NOTES FOR SERVICING
Circuit Board Indications
a. The output pin of th e 3 pin Regulator ICs is indi-
cated as shown .
b. For other ICs, pin 1 and every fifth pin are indicated
as shown.
c. The 1st pin of every male connector is indicate d as
shown.
Instructions for Connectors
1. When you connec t or di scon nect 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.
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)
(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 iro n to center of the flat pack-IC and he at
up. Then remove (glue will be melted). (Fig. S-1-6)
(4) Release the flat pack-IC from the CBA usi ng twee-
zers. (Fig. S-1-6)
Caution:
1. The Flat Pack-IC shape may differ by models. Use
an appropriate hot-air flat pack-IC desoldering
machine, whose shape matches that of the Flat
Pack-IC.
2. Do not supply ho t air to the chip parts a round 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)
T op Vie w
Out
In
Bottom View
Input
5
10
Pin 1
Pin 1
FFC Cable
Connector
CBA
* Be careful to avoid a short circuit.
Fig. S-1-1
1-3-2 NOTE_1
3. The flat pack-IC on the CBA is affixed with glue, so
be careful not to brea k or damage the foil of each
pin or the solder lands under the IC when removing
it.
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 al l pins of the flat pack-IC, you
can remove it easily. (Fig. S-1-3)
(2) Lift each lead of the flat pack-IC upward one by
one, using a shar p pin or wire to which solder will
not adhere (iron w ire). When h eating the p ins, use
a fine tip soldering iron or a hot air desoldering
machine. (Fig. S-1-4)
(3) Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iro n to center of the flat pack-IC and he at
up. Then remove (glue will be melted). (Fig. S-1-6)
(4) Release the flat pack-IC from the CBA usi ng 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 th e 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 iro n to center of the flat pack-IC and he at
up. Then remove (glue will be melted). (Fig. S-1-6)
(5) Release the flat pack-IC from the CBA usi ng twee-
zers. (Fig. S-1-6)
Note:
When using a solder ing iron, care must be taken
to ensure that the flat pack-IC is not be ing held by
glue. When the flat p ack-IC is removed from the
CBA, handle it gently becaus e it may be damaged
if force is applied.
Fig. S-1-2
Hot-air
Flat Pack-IC
Desoldering
Machine
CBA
Flat Pack-IC
Tweezers
Masking
Tape
Fig. S-1-3
Flat Pack-IC
Desoldering Braid
Soldering Iron
Fig. S-1-4
Fine Tip
Soldering Iron
Sharp
Pin
Fig. S-1-5
To Solid
Mounting Point
Soldering Iron
Iron Wire
or
Hot Air Blower
1-3-3 NOTE_1
2. Installation
(1) Using desoldering braid, remove the solder from
the foil of each pin of the flat pack-IC on the CBA so
you can install a replacement flat pack-IC more
easily.
(2)The “ I ” mark on the flat pack-IC indicates pin 1.
(See Fig. S-1-7.) B e sure this mar k matches t he 1
on the PCB when positioning for installation. Then
presolder the four corne rs of the flat pack-IC. (See
Fig. S-1-8.)
(3)Solder all pins of the flat pack-IC. Be sure that none
of the pins have solder bridges.
Instructions for Handling
Semi-conductors
Electrostatic breakdown of the semi-conductors may
occur due to a potential difference caused by 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 electr icity that may
be charged on the body.
2. Ground for Workbench
Be sure to place a conductive sheet or copper pla te
with proper grounding (1MΩ) on the workbench or
other surface, where the semi-conductors are to be
placed. Because the stati c electric ity charge on clothing will not escape throu gh the body grounding ban d,
be careful to avoid contacting semi-conductors with
your clothing.
Fig. S-1-6
Fine Tip
Soldering Iron
CBA
Flat Pack-IC
Tweezers
Fig. S-1-7
Example :
Pin 1 of the Flat Pack-IC
is indicated by a " " mark.
Fig. S-1-8
Presolder
CBA
Flat Pack-IC
<Incorrect>
CBA
Grounding Band
Conductive Sheet or
Copper Plate
1MΩ
1MΩ
<Correct>
CBA
1-4-1 HG240PFS
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 ta pe into the Deck Mecha nism Assembly and
press the PLAY button. The tape will be loaded into
the Deck Mechanism Asse mbly. Make sure the power
is on, connect TP 507 (S-INH) to GND. This will stop
the function of Tape Start Sensor, Tape End Sensor
and Reel Sensors. (If these TPs are conn ected before
plugging in the unit, the function of the sensors will
stay valid.) See Fig. 1.
Note: Because the Tape End Sensors are inacti ve, do
not run a tape all the way to the start or the end of the
tape to avoid tape damage.
Fig. 1
TP507
S-INH
Q504
Q505
1-5-1 HG240DC
CABINET DISASSEMBLY INSTRUCTIONS
1. Disassembly Flowchart
This flowchar t i ndica tes th e disas sembly steps to g ain
access to item(s) to be serviced. When reassembling,
follow the steps in reverse order. Bend, route, and
dress the cables as they were originally.
2. Disassembly Method
(1): Identification (location) No. of parts in the figures
(2): Name of the part
(3): Figure Number for reference
(4): Identification of parts to be removed, unhooked,
unlocked, released, unplugged, unclamped, or
desoldered.
P=Spring, L=Locking Tab, S=Screw,
CN=Connector
*=Unhook, Unlock, Release, Unplug, or Desolder
e.g. 2(S-2) = two Screws (S-2),
2(L-2) = two Locking Tabs (L-2)
(5): Refer to “Reference Notes.”
Reference Notes
CAUTION: Locking Tabs (L-1) and (L-2) are fragile.
Be careful not to break them.
1. Remove five Screws (S-2), 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 reass embling , so lde r wi re jumpers as shown
in Fig. D5.
3. Before installing the Deck Assembly, be sure to
place the pin of LD-SW o n Main CBA as sh own in
Fig. D6. Then, install the Deck Assembly while
aligning the hole of Cam Gear with the pin of LDSW, the shaft of Cam G ear w ith the ho le of LD-SW
as shown in Fig. D6.
ID/
LOC.
No.
PART
REMOVAL
Fig.
No.
REMOVE/*UNHOOK/
UNLOCK/RELEASE/
UNPLUG/DESOLDER
Note
[1] Top Case D1 7(S-1) -
[2]
Front
Assembly
D2 *3(L-1),*4(L-2) -
[3]
VCR
Chassis
Unit
D3 5(S-2), 2(S-3), (S-4), 1
[4] Jack CBA D4 Desolder, (S-5) -
[5]
Deck
Assembly
D5,
D6
2(S-6), Desolder 2,3
[6] Main CBA D5 ---------- -
[7]
Cylinder
Shield
D5 (S-7) -
↓
(1)
↓
(2)
↓
(3)
↓
(4)
↓
(5)
[5] Deck Assembly
[4] Jack CBA
[1] Top Case
[2] Front Assembly
[3] VCR Chassis Unit
[6] Main CBA
[7] Cylinder Shield
1-5-2 HG240DC
Fig. D1
(S-1)
(S-1)
(S-1)
[1] T op Case
Fig. D2
(L-2)
(L-1)
[2] Front
Assembly
(L-2)
Fig. D3
(S-2)
(S-2)
(S-4)
(S-2)
(S-2)
(S-3)
(S-3)
[3] VCR
Chassis Unit
Fig. D4
(S-5)
[4] Jack CBA
Desolder
1-5-3 HG240DC
Fig. D5
(S-7)
[5] Deck
Assembly
FE Head
Cylinder Assembly
ACE Head
Assembly
[7] Cylinder Shield
[6] Main CBA
(S-6)
(S-6)
From
FE Head
From
Cylinder
Assembly
From
ACE Head
Assembly
Lead with
white stripe
Lead with
blue stripe
Desolder
from bottom
Lead with
blue stripe
From
Capstan Motor
Assembly
Lead connections of Deck Assembly and Main CBA
Printing
side
TOP VIEW
Fig. D6
[6] Main CBA
SW507
LD-SW
LD-SW
Pin
Hole
Hole
Shaft
Cam Gear
[6] Main CBA
[5] Deck Assembly
Pin
1-6-1 HG240EA
ELECTRICAL ADJUSTMENT INSTRUCTIONS
General Note: "CBA" is an abbreviation for
"Circuit Board Assembly."
NOTE:
1.Electrica l adjustments a re require d after replac ing
circuit componen ts and certain me chanical parts.
It is impor tant to do these adjustments on ly after
all repairs and replacements have been completed. Also, do not attempt these adjustments
unless the proper equipment is available.
2.To pe rform these alig nment / confirmation procedures, make sure that the tracking control is set in
the center positio n: 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 deter mine the Head Switching po sition during
playback.
Symptom of Misadjustment:
May cause Head Switching noi se or vertical jitter
in the picture.
Reference Notes:
Playback the Alignment tape and adjust VR501 so that
the V-sync front edge of the CH1 vi deo output waveform is at the 6.5H±1H(412.7µs±63.5µs) delayed position from the r ising edge of the CH 2 head switching
pulse waveform.
Test point Adj.Point Mode Input
J23(V-OUT)
TP502(RF-SW)
GND
VR501
(Switching Point)
(MAIN CBA)
PLAY
(SP)
-----
Tape
Measurement
Equipment
Spec.
FL6A Oscilloscope
6.5H±1H
(412.7µs±63.5µs)
Connections of Measurement Equipment
Figure 1
Oscilloscope
Main CBA
J23
CH1 CH2
Trig. (+)
GND
TP502
EXT. Syncronize Trigger Point
1.0H
CH1
CH2
Switching Pulse
6.5H+/-1H (412.7µs+/-63.5µs)
V-Sync
0.5H
BLOCK DIAGRAMS
Servo/System Control Block Diagram
HG232BLS
1-7-1
M
M
LOADING
MOTOR
CAPSTAN MOTOR
CN504
MAIN CBA
KEY- 2
C-CONT
C-FG
D-PFG
ST-S
T-REEL
C-F/R
KEY- 1
REMOCON-IN
CTL(+)
RESET
PG-DELAY
CTL(-)
D-V SYNC
D-REC-H
RF-SW
C-ROTA
END-S
14
90
87
94
95
CTL AMP OUT
97
76
10480
34
78
2
151318
33
31
8
7
RS501
REMOTE
SENSOR
81
D-CONT
77
T-REEL
Q501
Q562
Q563
Q564
Q565
RESET
Q503
S-REEL
79
SW-POINT
AL+5V
VR501
TIMER+5V
S-REEL
PS503
IIC-BUS SDA
IIC-BUS SDA
IIC-BUS SCL
A-MUTE-H
A-MUTE-H
V-ENV
6
P-ON-H
C-POW-SW
P-ON-H
C-POW-SW
P-DOWN-L
67
66
86
P-DOWN-L
SW506
FROM/TO
VIDEO BLOCK
TO
AUDIO BLOCK
SDA
SDA
SCL
SCL
TU701(TUNER UNIT)
IC503 (MEMORY)
72
83
IIC-BUS SCL
D-V-SYNC
D-REC-H
RF-SW
C-ROTA
IIC-BUS SDA
V-ENV
IIC-BUS SCL
71
3
5
SDA
SCL
12
11
CAS-LED
TIMER-LED
REC-LED
26
25
24
POWER-LED
23
D565 REC
D564 TIMER
D563 CAS
D562 POWER
D561 STAND-BY
+5V
LD-SW
9
AL+12V/+20.5V
P-ON+15V
AL+5V
AL+5V
SW507
AL+12V
P-ON+5V
LD-SW
AL+5V
D502
S-LED
FROM/TO
POWER
SUPPLY
BLOCK
KEY
SWITCH
KEY
SWITCH
TP507
SENS-INH
CAPSTAN
MOTOR
IC501
(SERVO/SYSTEM CONTROL)
AUDIO-SW-1
29
AUDIO-SW-2
30
AUDIO-SW-1
AUDIO-SW-2
5
6
CN502
12
P-ON+15V11AL+12V(2)10GND9D-PFG8D-CONT7LM-FWD/REV
6
GND5C-CONT4C-F/R3C-FG2P-ON+5V1AL+12V/+20.5V
SENSOR CBA
SENSOR CBA
END-S
ST-S
Q504
Q505
REC-
SAFETY
LM-
FWD/REV
REC-
SAF-SW
TP506
END-S
CONTROL
HEAD
AC HEAD ASSEMBLY
(DECK ASSEMBLY)
TP501
CTL
2 CTL(+)
1 CTL(-)
C-SYNC
58
C-SYNC
CYLINDER ASSEMBLY
DRUM
MOTOR
PG
SENSOR
M
Video Block Diagram
HG232BLV
1-7-2
CYLINDER ASSEMBLY
V(R)
V-COM
V(L)
CN253
123
VIDEO (R)-1
HEAD
SP
HEAD
AMP
EP
HEAD
AMP
REC FM
AGC
FROM/TO SERVO/SYSTEM
CONTROL BLOCK
FROM
SERVO/SYSTEM
CONTROL BLOCK
RF-SW
D-REC-H
C-ROTA
D-V-SYNC
V-ENV
LUMINANCE
SIGNAL
PROCESS
CHROMINANCE
SIGNAL
PROCESS
V-ENV
D-V-SYNC
C-ROTA/RF-SW
VIDEO (L)-1
HEAD
TU701(TUNER UNIT)
IC301
(Y/C SIGNAL PROCESS)
IC501 (OSD)
REC-VIDEO SIGNAL PB-VIDEO SIGNAL MODE: SP/REC
SERIAL
DECORDER
V-OUT1
1
V-IN1
1
33
V-OUT2
1
V-IN2 3
1
3
JACK CBA
485052
56
24
6
50
52
19
20
JK101
V-OUT1
V-IN1
19
20
JK102
CN151
CN152
CN101
CN102
V-OUT2
V-IN2
61
63
969593
94
CHARA.
INS.
CCD 1H DELAY
SP
BYPASS
MUTE
PB/EE
IN1
TUNER
IN1
TUNER
MUTE
PB/EE
IN2
IN2
AGC
PR
R
Y
C
P
RPRP
EP
Y. DELAY
Y/C
MIX
+
21
7978
AGC VXO
OSD
CHARACTER
MIX
FBC
1/2
58 59
65
2928
IIC-BUS SDA
IIC-BUS SCL
69684643
846270
D-REC-H
80
BUFFER
Q101
BUFFER
Q102
J23
V-OUT
WF1
TP301
X301
4.433619MHz
C-PB
WF3
VIDEO OUT
VIDEO IN
BUFFER
Q351
MAIN CBA
TP502
RF-SW
WF2
(DECK ASSEMBLY)
C-SYNC
C-SYNC
67
Audio Block Diagram
HG232BLA
1-7-3
REC
AMP
100
3
AUTO
BIAS
2
1
+5V
TU701(TUNER UNIT)
+5V
Q401
Q406
(SWITCHING)
BIAS
OSC
Q402
Q405
(PB=ON)
Q403
5
EQ
AMP
98
7
LINE
AMP
REC-ON
AUDIO HD-SW
CONTROL
MUTE
11
6
PB-ON
SP/LP-ON
P
TUNER
IN2
IN1
R
ALC
DET
SW
CTL
ALC
IC301 (AUDIO SIGNAL PROCESS)
IC151 (SWITCHING)
PB/EE
PB/EE
PB/EE
PB/EE
TUNER
TU-AUDIO
AUDIO
IN2
IN1
IN1
151317
3 A-PB/REC
CN504
4 A-COM
6 AE-H
5 AE-H/FE-H
AUDI O
HEAD
AUDI O
ERASE
HEAD
ACE HEAD ASSEMBLY
FE HEAD
2 FE-H
1 FE-H-GND
CN501
MAIN CBA
PB-AUDIO SIGNAL REC-AUDIO SIGNAL
Mode : SP/REC
71
A-MUTE-H
AUDIO-SW-1
AUDIO-SW-2
IIC-BUS SCL
IIC-BUS SDA
TO SERVO/SYSTEM
CONTROL BLOCK
TO SERVO/SYSTEM
CONTROL BLOCK
FULL
ERASE
HEAD
68 69
SERIAL
DECODER
(DECK ASSEMBLY)
12
16
INV
ATT
A-IN1
A-OUT1
7
5
JACK CBA
JK101
CN101
A-IN2
A-OUT2
8
6
7
5
8
6
JK102
CN102
CN151
CN152
2
21
152
4
1214151110
9
3
13
BUFFER
Q151
BUFFER
Q152
A-IN1
A-IN1
261
3
A-OUT1
A-OUT1
A-IN2
A-IN2
261
3
A-OUT2
A-OUT2
Power Supply Block Diagram
HG232BLP
1-7-4
2
4
16
6
7
COLD
MAIN CBA
HOT CIRCUIT. BE CAREFUL.
HOT
IC001
ERROR
VOLTAGE DET
Q002
Q003
Q001
F001 L003
LINE
FILTER
BRIDGE
RECTIFIER
D001 - D004
1
23
4
Q004
AC001
T001
P-ON+44V
P-ON+15V12P-ON-H
AL+12V/+20.5V
AL+12V
AL+5V
TIMER+5V
P-ON+5V
P-DOWN-L
Q051
Q054
Q056
Q052
131514
11
17
18
T1.6A L 250V
Q055
Q059
SHUNT
REGULATOR
AL-5V
C-POW-SW
Q057
Q058
1-7-5 HG232FIS
FUNCTION INDICATOR SYMBOLS
Note:
The following symbols will appear on the indicat or panel to indica te the curre nt mode or operati on of the VCR.
On-screen modes will also be momentarily displayed on the tv screen when you press the operation buttons.
Display panel
" H "= LED Light on, " L "= LED Light off
MODE INDICATOR AC TIVE
STANDBY Power on = " H "
Power off = " L "
FUNCTION VCR mode = " H "
TV mode = " L "
TAPE IN Cassette in = " H "
Cassette out = " L "
TIMER Timer stand by = " H "
One touch recording = " H "
Timer recording = " H "
General mode = " L "
REC REC mode = " H "
REC pause
General mode = " L "
Blinks at 0.8Hz interval
When reel and capstan mechanism is not
functioning correctly
“A R” is displayed on a TV screen. (Refer to Fig. 1.)
When tape loading mechanism is not functioning correctly
“A T” is displayed on a TV screen. (Refer to Fig. 2.)
When cassette loading mechanism is not
functioning correctly
“A C” is displayed on a TV screen. (Refer to Fig. 3.)
When the drum is not working properly
“A D” is displayed on a TV screen. (Refer to Fig. 4.)
P-ON Power safe ty dete ction
“A P” is displayed on a TV screen. (Refer to Fig. 5.)
TAPE IN
TIMER
REC
FUNCTION
STANDBY
1-7-6 HG232FIS
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
correctly
When tape loading mec hanism is not functioning c orrectly
When cassette lo ading mechanism is not functioning
correctly
When the drum is not working properly
P-ON Power safety detection
A
R
Fig. 1
A
T
Fig. 2
A
C
Fig. 3
Fig. 4
A
D
A
P
Fig. 5
1-8-1 SCPA1
SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS
Standard Notes
WARNING
Many electrical and mechanical parts in t his 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 par ts 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 pa rts list in this manual
carefully. The use of substitute replacemen t par ts that
do not have the same safety characteristics as specified in the par ts list may create shock, fire, or other
hazards.
Capacitor Temperature Markings
Notes:
1. Do not us e the part number shown on these d rawings 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=10
3
, M=106).
3. Resistor wattages ar e 1/4W or 1/6W unless otherwise specified.
4. All capacitance values are indicated in µF
(P=10
-6
µF).
5. All voltages are DC voltages unless otherwise
specified.
6. Electrical parts such as capacitors, connectors,
diodes, IC’s, transistors, resistors, switches, and
fuses are identified by four digits. The fi rst 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.
Mark
Capacity
change rate
Standard
temperature
Temperature
range
(B)
±10%
20°C -25~+85°C
(F) +30 - 80% 20°C -25~+85°C
(SR)
±15%
20°C -25~+85°C
(Z) +30 - 80% 20°C -10~+70°C
(Top View) (Bottom View)
(Bottom View)
Electrolytic Capacitor
+
Transistor or Digital Transistor
NPN Transistor
PNP Transistor
NPN Digital Transistor
PNP Digital
Transistor
(Top View)
(Top View)
E C B
E C B
Digital Transistor
CBA Symbols
Schematic Diagram Symbols
E C B
(Top View)
(Top View)
E C B
E C B
1-8-2 SCRK05
LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING
PAGES:
1. CAUTION:
FOR CONTINUED PROTECTION AGAI NST 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 functi on and reliability of repaired units, use only orig inal 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:
6. How to read converged lines
7. Test Point Information
231
5.0
(2.5)
PLAY mode
REC mode
5.0
The same voltage for
both PLAY & REC modes
Unit: Volts
Indicates that the voltage
is not consistent here.
1-D3
Distinction Area
Line Number
(1 to 3 digits)
Examples:
1. "1-D3" means that line number "1" goes to area "D3".
2. "1-B1" means that line number "1" goes to area "B1".
3
2
1
ABCD
1-B1
1-D3
AREA D3
AREA B1
: 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.
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