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SERVICE MANUAL
VIDEO CASSETTE RECORDER
This video deck is VHS type video
recorder. For proper operation, only
the VHS type cassette must be
used.
TK
No. 5201E
VT-FX695A
VT-FX695AC
March
2002
VIDEO-IN
AUDIO-IN
LR
CHANNEL
REC/IRT
REW
F.FWD
PLAY
STOP/EJECT
TRACKING
POWER
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
Digital Media Products Division, Tokai


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CONTENTS
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1-1
COMPARISON OF MODELS . . . . . . . . . . . . . . . . . . . . 1-2-1
Comparison of Features . . . . . . . . . . . . . . . . . . . . . . . 1-2-1
Comparison of Main Control ICs . . . . . . . . . . . . . . . . . 1-2-1
FUNCTION INDICATOR SYMBOLS . . . . . . . . . . . . . . 1-3-1
IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . . . . 1-4-1
Product Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . 1-4-1
Precautions during Servicing. . . . . . . . . . . . . . . . . . . . 1-4-1
Safety Check after Servicing . . . . . . . . . . . . . . . . . . . . 1-4-2
STANDARD NOTES FOR SERVICING . . . . . . . . . . . . 1-5-1
Circuit Board Indications . . . . . . . . . . . . . . . . . . . . . . . 1-5-1
Instructions for Connectors . . . . . . . . . . . . . . . . . . . . . 1-5-1
How to Remove/Install Flat Pack-IC . . . . . . . . . . . . . . 1-5-1
Instructions for Handling
Semi-conductors . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5-3
PREPARATION FOR SERVICING . . . . . . . . . . . . . . . . 1-6-1
How to Enter the Service Mode. . . . . . . . . . . . . . . . . . 1-6-1
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 1-7-1
ORERATING CONTROLS AND FUNCTIONS . . . . . . . 1-8-1
CABINET DISASSEMBLY INSTRUCTIONS . . . . . . . . 2-1-1
1. Disassembly Flowchart . . . . . . . . . . . . . . . . . . . . . . 2-1-1
2. Disassembly Method . . . . . . . . . . . . . . . . . . . . . . . . 2-1-1
DISASSEMBLY/ASSEMBLY PROCEDURES OF
DECK MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2-1
ALIGNMENT PROCEDURES OF MECHANISM . . . . . 2-3-1
ELECTRICAL ADJUSTMENT INSTRUCTIONS . . . . . 2-4-1
Test Equipment Required . . . . . . . . . . . . . . . . . . . . . . 2-4-1
Head Switching Position Adjustment. . . . . . . . . . . . . . 2-4-1
FIXTURE AND TAPE FOR ADJUSTMENT . . . . . . . . . 2-5-1
How to Use The Fixtures . . . . . . . . . . . . . . . . . . . . . . . 2-5-1
MECHANICAL ALIGNMENT PROCEDURES . . . . . . . 2-6-1
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6-1
1. Tape Interchangeability Alignment. . . . . . . . . . . . . . 2-6-2
1-A.Preliminary/Final Checking and
Alignment of Tape Path . . . . . . . . . . . . . . . . . . . 2-6-3
1-B.X Value Alignment . . . . . . . . . . . . . . . . . . . . . . . . 2-6-3
1-C.Checking/Adjustment of Envelope Waveform . . . 2-6-4
1-D.Azimuth Alignment of
Audio/Control/Erase Head . . . . . . . . . . . . . . . . . 2-6-4
STANDARD MAINTENANCE . . . . . . . . . . . . . . . . . . . . 2-7-1
Service Schedule Components . . . . . . . . . . . . . . . . . . 2-7-1
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7-2
EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1-1
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1-1
Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1-2
Deck Mechanism View 1 . . . . . . . . . . . . . . . . . . . . . . . 3-1-3
Deck Mechanism View 2 . . . . . . . . . . . . . . . . . . . . . . . 3-1-4
Deck Mechanism View 3 . . . . . . . . . . . . . . . . . . . . . . . 3-1-5
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . 3-2-1
Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . 3-2-1
Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2-3
SCHEMATIC DIAGRAMS/CBA'S AND
TEST POINTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1-1
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1-3
Main 1/4 Schematic Diagram . . . . . . . . . . . . . . . . . . . 4-1-4
Main 2/4 Schematic Diagram . . . . . . . . . . . . . . . . . . . 4-1-5
Main 3/4 Schematic Diagram . . . . . . . . . . . . . . . . . . . 4-1-6
Main 4/4 Schematic Diagram . . . . . . . . . . . . . . . . . . . 4-1-7
Function Schematic Diagram . . . . . . . . . . . . . . . . . . . 4-1-8
Function CBA Top View . . . . . . . . . . . . . . . . . . . . . . . 4-1-8
Function CBA Bottom View . . . . . . . . . . . . . . . . . . . . . 4-1-8
Main CBA Top View . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1-9
Main CBA Bottom View . . . . . . . . . . . . . . . . . . . . . . . 4-1-10
BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2-1
Servo/System Control Block Diagram . . . . . . . . . . . . . 4-2-1
Video Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . 4-2-2
Audio Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . 4-2-3
Hi-Fi Audio Block Diagram . . . . . . . . . . . . . . . . . . . . . 4-2-4
Power Supply Block Diagram . . . . . . . . . . . . . . . . . . . 4-2-5
SYSTEM CONTROL TIMING CHARTS . . . . . . . . . . . . 4-3-1
IC PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . 4-4-1
LEAD IDENTIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . 4-5-1
CHAPTER 1 GENERAL INFORMATION
CHAPTER 2 DISASSEMBLY AND ADJUSTMENT
CHAPTER 3 EXPLODED VIEWS AND PARTS LIST
CHAPTER 4
SCHEMATIC AND BLOCK DIAGRAMS/
CBA'S


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1-1-1
SPECIFICATIONS
VT-FX695A / FX695AC
CHAPTER 1
GENERAL INFORMATION


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1-2-1
COMPARISON OF MODELS
Comparison of Features
: Same as on left
Comparison of Main Control ICs
ITEM
VT-FX695A/FX695AC
VT-FX685A/FX685AC
Video Format
VHS
Y/C Separation
Comb Filter
YNR (Luminance Noise Reduction)
Circuit
VV
(2 lines)
New Synchronise Circuit
[
V
Picture Control
V
(Soft/Normal/Fine)
V
(Normal/Soft)
Video/Audio Input (Rear)
1/1 (IN1)
Video/Audio Input (Front)
1/1 (IN2)
Video/Audio Output (Rear)
1/1 (OUT1)
Remote Controller
V-RM3
VT-RMF1
Tape Navigation Feature
[
Stereo CM Skip Feature
[
V
CM Auto (Advance) Feature
[
Auto Cut Feature
V
Just Clock Feature
V
(Manual Channel Setting)
V
Number of Timer Programming
8 Program/year
Self Diagnosis Funtion
V
(4 Modes)
V
(8 Modes)
Back-up Time
30 s
60 min
SQPB
V
Surge Absorber
V
Auto Power Off Feature
V
Local Broadcast Setting
V
CS Programming
V
(Auto Line Recording)
V
Extending Programming
V
[
Multi Search Feature
V
(Index, Video, Introduction, Skip/
Search)
V
Search Speed
SP: X5
EP: X5/X15
SP: X7/X11
EP: X21/X33
FF/REW Time (T-120 Tape)
FF: approx. 72 s, REW: approx. 72 s
FF: approx. 90 s, REW: approx. 54 s
Head Composition
DA4+Hi-Fi
SP: 2[49/58
µm]
EP: 2[21/21
µm]
Hi-Fi Audio: 2[28/28
µm]
DA4+Hi-Fi
SP: 2[48/56
µm]
EP: 2[19/19
µm]
Hi-Fi Audio: 2[28/28
µm]
Video Head Material
SP: Ferrite
EP: Ferrite
Hi-Fi Audio: Ferrite
VISS
V
(Index Search)
V
ITEM
OPERATION
VT-FX695A/FX695AC
VT-FX685A/FX685AC
Video
Video Signal Process
LA71091M(IC301)
Audio
FM Audio Signal Process
LA72655M(IC451)
LA72653M (IC451)
Linear Audio Signal Process
Included in IC301
System Control
Main Microcomputer
µP
M37765MAA1N0GP(IC501)
M37765MAA1N5GP(IC501)
VCR-EEP ROM
-
BR24C01AF-W(IC505)
Reset
-
Loading Motor Drive
-
BD6655FP(IC506)
Cylinder/Loading Motor Control
-
BD6655FP(IC506)
Power Reset
-
Timer
Display Driver
Included in IC501
Power
Switching Driver
-
-
VIDEO
INPUT/
OUTPUT
OTHER
MECHANISM


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1-3-1
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
LED MODE
INDICATOR ACTIVE
CASSETTE "IN"
CASSETTE "OUT"
"
"
"
"
ON
OFF
VCR/TV VCR MODE
VCR/TV TV MODE
" VCR "
" VCR "
ON
OFF
CLOCK
" 88:88 "
" PM "
ON
ON/OFF
POWER ON
" PWR. "
ON
REC
" REC "
ON
REC PAUSE
" REC "
Blinks at 0.8Hz interval
T-REC, OTR
"
"
ON
(T-REC OFF, T-REC incomplete
Blinks at 0.8Hz interval)
When reel and capstan mechanism is not
functioning correctly
"
"
"
1 "
Blinks at 0.8Hz interval
When tape loading mechanism is not func-
tioning correctly
"
"
"
2 "
Blinks at 0.8Hz interval
When cassette loading mechanism is not
functioning correctly
"
"
"
3 "
Blinks at 0.8Hz interval
When the drum is not working properly
"
"
"
4 "
Blinks at 0.8Hz interval
S-INH condition
All modes
Blinks at 0.8Hz interval