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EVO-250
Service Manual
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Service manual
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Sony EVO-250 Service manual

EVO-250
SERVICE MANUAL
B MECHANISM
SPECIFICATIONS
US Model
Canadian Model
MICROFILM
VIDEO CASSETTE RECORDER
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety checks before releasing the set to the customer.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ! LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS P AR SONY.
1. Check the area of your repair for unsoldered or poorly-soldered connections. Check the entire board surface for solder splashes and bridges.
2. Check the interboard wiring to ensure that no wires are "pinched" or contact high-wattage resistors.
3. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair . Point them out to the customer and recommend their replacement.
4. Look for parts which, through functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replace-ment.
5. Check the B+ voltage to see it is at the values specified.
6. Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270˚C during repairing.
• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering or unsoldering.
— 2 —

T ABLE OF CONTENTS

SERVICE MODE
1. Power Supply During Repairs ············································ 6
2. How to Take a Cassette Out When the Main Power Cannot Be Turned ON (Forced Ejected)········································· 6
SELF-DIAGNOSIS FUNCTION
1. Self-diagnosis Function ······················································ 7
2. Self-diagnosis display························································· 7
3. Service Mode Display ························································ 7
3-1. Display Method ·································································· 7 3-2. Switching of Backup No. ··················································· 7 3-3. End of Display···································································· 7
4. Self-diagnosis Code Table ·················································· 8
1. GENERAL
This section is extracted from instruction manual.
Before you begin
Using this manual ··································································1-1 Checking supplied accessories ··············································1-1 Identifying the parts ·······························································1-1
Basic operations
Connecting to a video monitor ··············································1-2 Installing the DC adaptor/charger··········································1-3 Inserting a cassette ·································································1-3 Playing back a tape ································································1-3
Advanced operations
Editing onto another tape·······················································1-4 Recording from a VCR or TV ···············································1-5 Changing the mode settings···················································1-5 Using alternative power sources ············································1-6
Additional information
Charging the vanadium-lithium battery in the VCR ··············1-7 Usable cassettes and playback modes····································1-7 Notes on “InfoLITHIUM” battery pack ································1-8 Maintenance information and precautions·····························1-8 Using your VCR abroad ························································1-9 Trouble check ········································································1-9 Self-diagnosis display ··························································1-10 Warning indicators ·······························································1-10
2. DISASSEMBLY
2-1. CASSETTE LID ASSEMBLY········································2-1 2-2. CABINET (BOTTOM) ASSEMBLY······························2-1 2-3. MD BLOCK ASSEMBLY ··············································2-2 2-4. CONTROL (FK-71) SWITCH BLOCK,
DD-100 BOARD ·····························································2-3
2-5. VC-197 BOARD ····························································· 2-3 2-6. B MECHANISM DECK ·················································2-3 2-7. CABINET (R) BLOCK ASSEMBLY,
FP-571 BOARD ······························································2-4
2-8. EX-34 BOARD ·······························································2-4 2-9. IO-62, IR-29, FP-572, FP-573, FP-574,
FP-575 BOARDS, BUZZER···········································2-4
2-10. CIRCUIT BOARDS LOCATION ···································2-5
3. BLOCK DIAGRAMS
3-1. OVERALL BLOCK DIAGRAM ····································3-1 3-2. VIDEO BLOCK DIAGRAM 1 ·······································3-4 3-3. VIDEO BLOCK DIAGRAM 2 ·······································3-7 3-4. SERVO BLOCK DIAGRAM ········································3-10 3-5. SYSTEM CONTROL BLOCK DIAGRAM ·················3-13 3-6. AUDIO BLOCK DIAGRAM ········································3-15 3-7. MODE CONTROL BLOCK DIAGRAM ·····················3-17 3-8. POWER SUPPLY BLOCK DIAGRAM ·······················3-20
4. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
4-1. FRAME SCHEMATIC DIAGRAM································4-1 4-2. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS ············································4-3
• VC-197 (REC/PB HEAD AMP, TIME CODE, D/A C, VIDEO PROCESS, A/D C, Y/C PROCESS, TBC PROCESSOR/CNR, VIDEO IN/OUT, IR V/A PROCES­SOR, SERVO/SYSTEM CONTROL, SERVO, MODE CONTROL, A UDIO, AFM PROCESSOR)
PRINTED WIRING BOARD ·························4-5
• VC-197 (REC/PB HEAD AMP)
SCHEMATIC DIAGRAM ···························· 4-11
• VC-197 (TIME CODE, D/A C)
SCHEMATIC DIAGRAM ···························· 4-15
• VC-197 (VIDEO PROCESS, A/D C)
SCHEMATIC DIAGRAM ···························· 4-19
• VC-197 (Y/C PROCESS)
SCHEMATIC DIAGRAM ···························· 4-21
• VC-197 (TBC PROCESSOR/CNR)
SCHEMATIC DIAGRAM ···························· 4-27
• VC-197 (VIDEO IN/OUT)
SCHEMATIC DIAGRAM ···························· 4-29
• IR-29 (IR TRANSMITTER)
PRINTED WIRING BOARD ·······················4-33
• VC-197 (IR A/V PROCESSOR)
SCHEMATIC DIAGRAM ···························· 4-34
• VC-197 (SERVO/SYSTEM CONTROL)
SCHEMATIC DIAGRAM ···························· 4-37
• VC-197 (SERVO) SCHEMATIC DIAGRAM ···········4-41
• VC-197 (MODE CONTROL)
SCHEMATIC DIAGRAM ···························· 4-45
• FP-249 (S/T REEL SENSOR), FP-356 (TOP SENSOR), FP-355 (TAPE LED) FLEXIBLE BOARD
PRINTED WIRING BOARD ·······················4-48
• VC-197 (AUDIO, AFM PROCESSOR)
SCHEMATIC DIAGRAM ···························· 4-49
• EX-34 (EASY CONNECTOR)
PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM ···························· 4-53
• IO-62 (AV IN/OUT) SCHEMATIC DIAGRAM ·······4-57
• IO-62 (AV IN/OUT) PRINTED WIRING BOARD ·· 4-61
• DD-100 (POWER SUPPLY)
PRINTED WIRING BOARD ·······················4-63
• DD-100 (POWER SUPPLY)
SCHEMATIC DIAGRAM ···························· 4-65
5. ADJUSTMENT
5-1. PREPARATIONS ····························································5-1 1-1. PREPARATIONS BEFORE ADJUSTMENT·················5-1 1-1-1.List of Service Tools························································ 5-1 5-2. MECHANICAL SECTION ADJUSTMENT ·················5-3 2-1. PREPARATION FOR CHECKING, ADJUSTING
AND REPLACING THE MECHANISM·······················5-3
2-1-1.Cassette Compartment Block Assy ·································5-3
1. Disassembly Procedure ···················································5-3
2. Precautions During Re-Assembling ································ 5-3 2-1-2.How to Operate the Mechanism with the Cassette
Compartment Block Assy Removed ·······························5-4
1. How to load a cassette tape ·············································5-4
2. How to establish RECORD mode ···································5-4
3. How to eject a cassette tape·············································5-4 2-2. PERIODIC CHECK AND MAINTENANCE ITEMS ··· 5-5 2-2-1.Rotary Drum Assy Cleaning············································ 5-5 2-2-2.Tape Path Cleaning ··························································5-5 2-2-3.Periodic Check Items·······················································5-6
— 3 —
2-2-4.Use Of Mode Selector ················································· 5-7 4-1. Outline ·············································································5-7
1. Manual test ······································································5-7
2. Step test ···········································································5-7
3. Auto test ·········································································· 5-7 4-2. Operation ·········································································5-8
1. Operation flow chart························································5-8
2. Turning ON the mode selector ·····································5-8
3. Turning OFF the mode selector ···································5-8
4. Mechanism selection ······················································· 5-9
5. Mode selection ································································ 5-9
6. Manual test ······································································5-9
7. Step test ···········································································5-9
8. Auto test ·········································································· 5-9
9. Battery alarm display·····················································5-10 2-3. CHECKING, ADJUSTING AND REPLACING
THE MECHANISM······················································ 5-11
2-3-1.HC Roller Block Assy ···················································5-11
1. Disassembly Procedure ·················································5-11
2. Precautions During Re-Assembly ·································5-11 2-3-2.Drum Assy ·····································································5-12
1. Disassembly Procedure ·················································5-12
2. Precautions During Re-Assembly ·································5-12 2-3-3.Drum Base Block Assy, Shaft Ground ··························5-13
1. Disassembly Procedure ·················································5-13
2. Precautions During Re-Assembly ·································5-13 2-3-4.Gooseneck Retainer, Gooseneck Gear Assy ·················5-14
1. Disassembly Procedure ·················································5-14
2. Precautions During Re-Assembly ·································5-14 2-3-5.LS Chassis Block Assy, Mechanical Chassis
Block Assy·····································································5-15
1. Disassembly Procedure ·················································5-15
2. Precautions During Re-Assembly ·································5-15 2-3-6.T Reel Table Assy, T Ratchet, T Soft Gear Block Assy 5-17
1. Disassembly Procedure ·················································5-17
2. Precautions During Re-Assembly ·································5-17 2-3-7.Tension Regulator Band Assy, TG1 Arm Assy,
S Reel Table Assy, S Ratchet, S Ratchet Release Plate, R VS Arm ·······································································5-18
1. Disassembly Procedure ·················································5-18
2. Precautions During Re-Assembly ·································5-18 2-3-8.Pinch Arm Assy, TG4 Arm Block Assy ························5-19
1. Disassembly Procedure ·················································5-19
2. Precautions During Re-Assembly ·································5-19 2-3-9.LS Cam Plate, LS Guide Cover, Lid Opener, EJ Arm,
Lock Guide ····································································5-20
1. Disassembly Procedure ·················································5-20
2. Precautions During Re-Assembly ·································5-20 2-3-10.Guide Base (S) and (T) Block Assemblies,
Guide Rail······································································5-21
1. Disassembly Procedure ·················································5-21
2. Precautions During Re-Assembly ·································5-21 2-3-11.DC Motor Assy (Loading) ···········································5-23
1. Disassembly Procedure ·················································5-23
2. Precautions During Re-Assembly ·································5-23 2-3-12.Tension Regulator Plate 2, Relay Gear,
M Slider Assy ································································5-24
1. Disassembly Procedure ·················································5-24
2. Precautions During Re-Assembly ·································5-24 2-3-13.LS Arm, HC Drive Arm, Pinch Press Plate,
Tension Regulator Plate·················································5-25
1. Disassembly Procedure ·················································5-25
2. Precautions During Re-Assembly ·································5-25 2-3-14.Cam Gear ·····································································5-26
1. Disassembly Procedure ·················································5-26
2. Precautions During Re-Assembly ·································5-26 2-3-15.GL Slider Assy, GL Arm··············································5-27
1. Disassembly Procedure ·················································5-27
2. Precautions During Re-Assembly ·································5-27 2-3-16.Rotary Switch ······························································5-28
1. Disassembly Procedure ·················································5-28
2. Precautions During Re-Assembly ·································5-28 2-3-17.Capstan Motor ·····························································5-29
1. Disassembly Procedure ·················································5-29
2. Precautions During Re-Assembly ·································5-29 2-3-18.Tension Regulator Position Adjustment ······················5-30
1. Adjustment Procedure ···················································5-30 5-3-19.FWD Tape Hold-Back Tension Adjustment ················ 5-31
1. Adjustment Procedure ···················································5-31 2-4. TAPE PATH ADJUSTMENT········································5-32 2-4-1.Preparations for Adjustments ········································5-32 2-4-2.Tracking Adjustment ·····················································5-33 2-4-3.No.4 Guide (TG-4) Adjustment·····································5-33 2-4-4.CUE, REV Waveforms Check·······································5-34 2-4-5.Checks After Adjustments ·············································5-34
1. Tracking Check ·····························································5-34
2. Waveform Build-up Check ············································5-35
3. Tape Pass Check ····························································5-35 5-3. ELECTRICAL ADJUSTMENTS ·································5-36 3-1. PREPARATIONS BEFORE ADJUSTMENT···············5-36 3-1-1.Equipments to be Used·················································· 5-36 3-1-2.Precautions in Adjustment·············································5-37 3-1-3.Operating without a Cassette·········································5-37 3-1-4.Connector for Adjustments············································5-37 3-1-5.Connecting the Equipments···········································5-38 3-1-6.Checking the Input Signals············································5-39
1. S VIDEO input ······························································5-39
2. VIDEO input ·································································5-39 3-1-7.Alignment T ape ·····························································5-40 3-1-8.Input/Output Level and Impedance ·······························5-40 3-1-9.Recording Mode (Standard 8/Hi8) switching ···············5-40 3-2. INITIALIZATION OF D, E, F PAGE DATA ················5-41
1. Initialization of D, E, F Page Data ································5-41
2. Modification of D, E, F Page Data ································5-41
3. D Page Table··································································5-41
4. F Page Table ··································································5-42
5. E Page Table ··································································5-45 3-3. SYSTEM CONTROL SYSTEM ADJUSTMENTS ·····5-46
1. Battery End Adjustment (VC-197 board)······················5-46
2. Battery Down Voltage Check ········································5-46 3-4. SERVO SYSTEM ADJUSTMENTS ····························5-47
1. CAP FG Offset Adjustment (VC-197 board) ················5-47
2. SP Mode Switching Position Adjustment (VC-197 board) ·····························································5-47
3. LP Mode Switching Position Adjustment (VC-197 board) ·····························································5-48
3-5. VIDEO SYSTEM ADJUSTMENTS·····························5-48
1. 28 MHz Origin Oscillation Adjustment (VC-197 board) ·····························································5-48
2. Filter f0 Adjustment (VC-197 board)····························5-49
3. Y OUT Level Adjustment (VC-197 board) ···················5-49
4. C OUT Level Adjustment (VC-197 board) ···················5-50
5. RP Filter f
Adjustment (VC-197 board)·······················5-50
0
6. AFC f0 Adjustment (VC-197 board)······························5-51
7. REC Y Current Adjustment (VC-197 board) ················5-51
8. REC L Level Adjustment (VC-197 board)····················5-52
9. REC C Current Adjustment (VC-197 board) ················5-52
3-6. IR Transmitter Adjustments···········································5-53
1. IR Video Carrier Frequency Adjustment (VC-197 board) ·····························································5-53
2. IR Video Deviation Adjustment (VC-197 board) ··········5-53
3. IR Audio Deviation Adjustment (VC-197 board) ·········5-54
3-7. AUDIO SYSTEM ADJUSTMENT·······························5-55
1. 1.5 MHz Deviation Adjustment (VC-197 board) ··········5-56
— 4 —
2. 1.7 MHz Deviation Adjustment (VC-197 board) ·········· 5-56
3. BPF f0 Adjustment (VC-197 board) ·····························5-57 5-4. SERVICE MODE··························································5-58 4-1. ADJUSTMENT REMOTE COMMANDER ················5-58
1. Using the Adjustment Remote Commander··················5-58
2. Precautions Upon Using the Adjustment Remote Commander ···································································5-58
4-2. DATA PROCESS···························································5-59 4-3. SERVICE MODE··························································5-60
1. Test Mode Setting··························································5-60
2. Emergency Memory Address ········································5-61
2-1. EMG code (Emergency code) ······································· 5-61 2-2. MSW codes ···································································5-62
3. Bit V alue Discrimination ··············································· 5-63
4. Input/Output Selection Check ·······································5-63
5. Condensation, Head Clogging Check ··························· 5-64
6. VTR State Check (1) ····················································· 5-64
7. VTR State Check (2) ····················································· 5-64
8. VTR State Check (3) ····················································· 5-65
9. Record of Use Check·····················································5-65
6. REPAIR PARTS LIST
6-1. EXPLODED VIEWS ······················································ 6-1 6-1-1.OUTER CABINET ASSEMBLY···································· 6-1 6-1-2.UPPER CABINET BLOCK ASSEMBLY ······················6-2 6-1-3.MD BLOCK ASSEMBLY ·············································· 6-3 6-1-4.CASSETTE COMPARTMENT BLOCK SECTION······6-4 6-1-5.LS CHASSIS BLOCK SECTION ··································6-5 6-1-6.MECHANISM CHASSIS BLOCK SECTION···············6-6 6-2. ELECTRICAL PARTS LIST ··········································6-7
— 5 —

SERVICE NOTE

k
1. POWER SUPPLY DURING REPAIRS
In this unit, about 5 seconds after power is supplied (8.4V) to the battery terminal using the service power cord (J-6082-223-A), the power is shut off so that the unit cannot operate. This following two methods are av ailable to pre vent this. Take note of which to use during repairs.
Battery terminal
Battery sig terminal
‘
Method 1.
Connect the servicing remote commander RM-95 (J-6082-053-B) to the LANC jack, and set the remote commander switch to the “ADJ” side.
Battery switch
Battery terminal
’
Method 2.
Press the following battery switch using adhesive tape, etc.
2. HOW TO TAKE A CASSETTE OUT WHEN THE MAIN POWER CANNOT BE TURNED ON (FORCED EJECTED)
Procedure:
1. Remove the cassette lid referring to the section “2. DISASSEMBLY, 2-1”.
2. Remove the control switch block (FK-71 board) referring to the section “2. DISASSEMBLY, 2-4”.
3. Remove the VC-197 board referring to section “2. DISASSEMBLY, 2-5”, and remove the FP-220 flexible board from CN105 (8P) on
the VC-197 board.
4. Apply +4.5 V from the regulated power supply to the loading motor terminal as shown below and remove the cassette.
CAUTION: Be careful not contact with the lid frame assembly when applying +4.5 V.
Control switch bloc
Regulated power supply
4.5V GND
Loading motor
Lid frame assembly
— 6 —

SELF-DIAGNOSIS FUNCTION

1. Self-diagnosis Function

When problems occur while the unit is operating, the self-diagnosis function starts working, and displays on the monitor TV (Note) what to do. This function consists of two display; self-diagnosis display and service mode display. Details of the self-diagnosis functions are provided in the Instruction manual.
Blinks at 3.2Hz
3 1C

2. Self-diagnosis display

When problems occur while the unit is operating, the counter of the monitor TV shows a 4-digit display consisting of an alphabet and numbers, which blinks at 3.2 Hz. This 5-character display indicates the “repaired by:”, “block” in which the problem occurred, and “detailed code” of the problem. Note : Set the DISPLA Y in the menu system to V-OUT/LCD only
for the model with LCD screen, and press the DISPLAY button.
monitor TV
1 1
Repaired by:
C : Corrected by customer Indicates the appropriate H : Corrected by dealer step to be taken. E : Corrected by service E.g.
engineer 31 ....Reload the tape.
Block
32 ....Turn on power again.
Detailed Code
Refer to page 8 Self-diagnosis Code Table.

3. Service Mode Display

The service mode display shows up to six self-diagnosis codes shown in the past.
3-1. Display Method
While pressing the “STOP” key , set the po wer switch from OFF to “ON”, and continue pressing the “STOP” k ey for 5 seconds continuousl y . The service mode will be displayed, and the counter will show the backup No. and the 5-character self-diagnosis codes.
C : 3 1 : 1 1[3]
Backup No.
Order of previous errors
3-2. Switching of Backup No.
By rotating the SEL/PUSH EXEC dial, past self-diagnosis codes will be shown in order . The backup No. in the [] indicates the order in which the problem occurred. (If the number of problems which occurred is less than 6, only the number of problems which occurred will be shown.) [1] : Occurred first time [4] : Occurred fourth time [2] : Occurred second time [5] : Occurred fifth time [3] : Occurred third time [6] : Occurred the last time
self-diagnosis codes
3-3. End of Display
Turning OFF the power supply will end the service mode display.
Note: The “self-diagnosis display” data will be backed up by the coin-type lithium battery of FP-571 flexible board. When this
coin-type lithium battery is removed, the “self-diagnosis display” data will be lost by initialization.
— 7 —

4. Self-diagnosis Code T able

Self-diagnosis Code
Block
Function
Repaired by:
C
21
C
22
C
23
C
23
C
31
C
31
C
31
C
31
C
31
C
31
C
31
C
31
C
31
C
31
C
31
C
31
C
32
C
32
C
32
C
32
C
32
C
32
C
32
C
32
C
32
C
32
C
32
C
32
C
32
Detailed
Code
00 00 00 10
11
20 21 22 23 30 31 40 41 42 43 44
10
11
20
21
22
23
30
31
40
41
42
43
44
Symptom/State
Condensation. Video head is dirty. Non-standard battery is used. LOAD direction. Loading does not
complete within specified time UNLOAD direction. Loading does not
complete within specified time T reel side tape slacking when unloading S reel side tape slacking when unloading. T reel fault S reel fault FG fault when starting capstan FG fault during normal capstan operations FG fault when starting drum PG fault when starting drum FG fault during normal drum operations PG fault during normal drum operations Phase fault during normal drum operations LOAD direction loading motor time-
out UNLOAD direction loading motor
time-out T reel side tape slacking when
unloading. S reel side tape slacking when
unloading. T reel fault
S reel fault
FG fault when starting capstan FG fault during normal capstan
operations FG fault when starting drum
PG fault when starting drum FG fault during normal drum
operations PG fault during normal drum
operations Phase fault during normal drum
operations
.
Correction
Remove the cassette, and insert it again after one hour. Clean with the optional cleaning cassette. Use the InfoLITHIUM battery. Load the tape again, and perform operations from the beginning.
Load the tape again, and perform operations from the beginning.
Load the tape again, and perform operations from the beginning. Load the tape again, and perform operations from the beginning. Load the tape again, and perform operations from the beginning. Load the tape again, and perform operations from the beginning. Load the tape again, and perform operations from the beginning. Load the tape again, and perform operations from the beginning. Load the tape again, and perform operations from the beginning. Load the tape again, and perform operations from the beginning. Load the tape again, and perform operations from the beginning. Load the tape again, and perform operations from the beginning. Load the tape again, and perform operations from the beginning. Remove the battery or power cable, connect, and perform
operations from the beginning. Remove the battery or power cable, connect, and perform
operations from the beginning. Remove the battery or power cable, connect, and perform
operations from the beginning. Remove the battery or power cable, connect, and perform
operations from the beginning. Remove the battery or power cable, connect, and perform
operations from the beginning. Remove the battery or power cable, connect, and perform
operations from the beginning. Remove the battery or power cable, connect, and perform
operations from the beginning. Remove the battery or power cable, connect, and perform
operations from the beginning. Remove the battery or power cable, connect, and perform
operations from the beginning. Remove the battery or power cable, connect, and perform
operations from the beginning. Remove the battery or power cable, connect, and perform
operations from the beginning. Remove the battery or power cable, connect, and perform
operations from the beginning. Remove the battery or power cable, connect, and perform
operations from the beginning.
— 8 —
SECTION 1
GENERAL
EVO-250
This section is extracted from instruction manual.
1-1
1-2
1-3
1-4
1-5
1-6
1-7
1-8
1-9
1-10E
SECTION 2
DISASSEMBLY
NOTE : Follow the disassembly procedure in the numerical order given.

2-1. CASSETTE LID ASSEMBLY

1
Screws (M2) lock ace P2
EVO-250
Cassette lid assembly
4
3
Cassette lid assembly
2
Slide the
eject button

2-2. CABINET (BOTTOM) ASSEMBLY

4
Screws (M2) lock ace P2
5
Cabinet (bottom)
assembly
1
Push release button
2
4
Screws (M2) lock ace P2
Jack lid
3
4
Screw (M2)
lock ace P2
2-1

2-3. MD BLOCK ASSEMBLY

1
Battery panel
assembly
4
Screw (M2)
lock ace P2
VC-197
BOARD
5
2
4
Screw (M2) lock ace P2
3
FP-573 flexible board
CN107
3
FP-571 flexible
board CN111
4
Screws (M2)
lock ace P2
3
FP-570 flexible board CN109
3
FP-572 flexible board
CN108
2-2

2-4. CONTROL (FK-71) SWITCH BLOCK, DD-100 BOARD

1
Remove the flexible board from
the VC-197 board CN110 (10P)
3
Control (FK-71) switch block
2
Screw
×
1.6)
(M1.4
2
Screw (M1.4 × 1.6)
3
Shield case
2
DD-100 board

2-5. VC-197 BOARD

4
Screws (M2) lock ace P2
1
Screw (M2)
2
RP shield case
5
VC-197 board
FP-249 flexible board CN102 (From T/S reel sensor)
Flexible board CN103 (From capstan motor)
1
Screws (M2) lock ace P2

2-6. B MECHANISM DECK

2
LID frame assembly
1
Screws (M2)
5
B mechanism
deck
FP-220 flexible board CN105 (From loading motor)
Flexible board CN104 (From drum motor)
Flexible board CN101 (From video head)
1
Screw (M2)
lock ace P2
2
Screw (M2)
lock ace P2
2-3
4
Main frame
assembly
3
Screws (M2)
lock ace P2
2-7. CABINET (R) BLOCK ASSEMBLY,
FP-571 BOARD
1
+KTP 2 × 5
2
Lithium lid
3
FP-571
flexible board

2-8. EX-34 BOARD

2
Tapping screws
EX-34
BOARD
3
EX-34 board
1
FP-570 board
Cabinet (R) block assembly
1
Tapping screws

2-9. IO-62, IR-29, FP-572, FP-573, FP-574, FP-575 BOARDS, BUZZER

1
Tapping screws (2 × 6)
!¢
FR-572 flexible board
3
Screw (M2)
lock ace P2
4
IR-29 board
0
IO-62 board
9
Screws (M2) lock ace P2
!¡
FP-573 flexible board
IR- 29
Jack frame assembly
7
Screw (M2) lock ace P2
1
Tapping screws (2 × 6)
8
FP-575 flexible board
IO-62
6
FP-574 flexible board
5
Screws (M2)
lock ace P2
Remove harness of buzzer from claw
!™
Buzzer
2-4
2
Cabinet (R) assembly

2-10. CIRCUIT BOARDS LOCATION

DD-100 (POWER SUPPLY)
EX-34 (EASY CONNECTOR)
VC-197 MAIN AMP, EVR, VIDEO, TBC, IR DRIVER, SERVO/SYSTEM CONTROL, MODE CONTROL, AUDIO
IO-62 (AV IN/OUT)
IR-29 (IR TRANSMITTER)
FP-575 (LANC JACK)
2-5E

3-1. OVERALL BLOCK DIAGRAM

VC-197 BOARD
(SEE PAGE 4-11,15,19,21,27,29,34,37,41,45,49)
SECTION 3
EVO-250
BLOCK DIAGRAMS
AUDIO
IN
(SEE PAGE 4-57)
J002
SP901
(SPEAKER)
EASY
CONNECTOR
J103
S VIDEO
VIDEO
RFU DC
OUT
L
(MONO)
R
FP-574
(FLEXIBLE)
(SEE PAGE 4-55) (SEE PAGE 4-54)
EX-34
BOARD
(SEE PAGE 4-58)
IO-62
BOARD
J102
16
(SEE PAGE 4-60)
FP-570
(FLEXIBLE)
V/Y IN
C IN
V OUT
EZ AL
EZ AR AUDIO L AUDIO R
LANC SIG
ID 1 ID 2
FP-573
(FLEXIBLE)
Y I/O
C I/O
V I/O
RF DC
AL I/O
AR I/O
HP L
HP R
SP 1 SP 2
IC001
HP/SP
AMP
IC129
Y/C
PROC.
VC SCK,VC SO,VC SI
CURRENT
LIMIT
EZ AL
EZ AR AUDIO L AUDIO R
L R
IR V
HP L
HP/LINE R
Y C
C Y
AFM AUDIO PROC.
IC361
IR
IC111
SERIAL
INTERFASE
IC112
IC206
MCK
VC SCK,VC SO,VC SI
IC203
S/H
AGC
IC114
DIGITAL
ZOOM
TBC/CNR
PROC.
IC109
REC AFM
PB RF
IR-29 BOARD
FP-572
(FLEXIBLE)
(SEE PAGE 4-36) (SEE PAGE 4-36)
IC104
HI SI
HI SCK,HI SO,HI SI,SYS RST,OSD SO,OSD SCK
IC205
CLOCK
DIVIDE
IC204
X1601
C/G
OSD
IC108
EVR
D/A CONV.
IC105
Y
PROC.
Y
10
C
PROC.
REC C
C
VC SCK,VC SO,VC SI
9
8
LED
DRIVER
8
8
IC106
4
4
10
IC102
MOD/
DEMO.
CONTROL
SIGNAL
IC103
8
CONV.
A/D
PCM
MOD.
IC128
REC PCM PCM RFC
REC Y RFC C
PB Y PB C
REC AFM
PB RF
IC101
REC/PB
REC ATF
PB SP DET CLOG DET
EEPROM
AMP
Q1001-1003,
IC120
ATF
SERVO
VC SCK,VC SO,VC SI
IC116
SP2X LP1X SP1X LP2X
Q1008
FLYING ERASE
OSC
REF PILOT ATF ERROR SP DET CLOG DET
HI SCK,HI SO,HI SI,SYS RST,OSD SO,OSD SCK
VC SCK,VC SO,VC SI
FLYING ERASE
SP2X LP1X
D001
T/E LED
B -MECHA
(SEE PAGE 4-44)
SP1XLP2X
Q001
TAPE TOP
SENSOR
Q002
TAPE END
SENSOR
M901 DRUM MOTOR
DRUM FG/PG
CAPSTAN
FG
M
M902
CAPSTAN
MOTOR
M
CC DOWN
SWITCH
M903
LOADING
MOTOR
T REEL FG
SENSEOR
S REEL FG
SENSEOR
CAPSTAN
MOTOR
SHAPER
S001
S002
MODE
H001
H002
DRIVE
WAVE
M
CC DOWN SW
ME/MP HI8 MP REC PRROF
MSW A-C
LOAD,UNLOAD
TAPE TOP
T REEL(+)( )
S REEL(+)( )
TAPE END
IC121
DRUM
MOTOR
DRIVE
(2/2)
IC122
DETECTOR
DETECTOR
LED
DRIVE
D VS
C VS
TAPE TOP
T REEL
T REEL
FG AMP
S REEL
FG AMP
TAPE END
IC501
DRUM DRIVE
CAPSTAN
DRIVE
HI SCK,HI SO,HI SI,SYS RST,OSD SO,OSD SCK
VC SCK,VC SO,VC SI
IC122
LOADING
MOTOR
M903
(2/3)
IC121
WAVE
SHAPER
(1/2)
PWM
PWM
D ERR
C ERR
CONTROL
SIGNAL
CC DOWN SW
ME/MP HI8 MP
REC PRROF
MSW A-C
(1/3)
TAPE TOP
T REEL
S REEL
TAPE END
TAPE LED ON
(1/2)
D PG/FG
IC122
LPF
LPF
CAP FG
REF PILOT
ATF ERROR
SP DET
CLOG DET
(3/3)
D PWM
C PWM
IC117
SERVO/
SYSTEM
CONTROL
SERVO
EEPROM
IC116
CONTROL
SIGNAL
IC1952
MODE
CONTROL
KEY AD0-2
S1952
EJECT
KEY AD3
MENU A,B
KEY AD6
POWER LED ON
SIRCS IN
VTR MODE SW
IC1995
LANC OUT LANC IN
SHOE ID1 ID2
ID2
RESET
BACKUP VCC
LANC
I/O
IC1951
INTIAL
RESET
BACKUP
VCC
(SEE PAGE 4-47)
FK-71
BOARD
S001-010
FUNCTION
KEY
(SEE PAGE 4-60)
FP-573
(FLEXIBLE)
LANC DC LANC SIG
(SEE PAGE 4-60)
FP-571
(FLEXIBLE)
BT001
LITHUM
BATTERY
(SEE PAGE 4-47)
(SEE PAGE 4-58)
IO-62
BOARD
S102
MENU
KEY
S107
CONTROL
DIAL
S101,103-106
FUNCTION
KEY
(SEE PAGE 4-57)
FP-574
(FLEXIBLE)
POWER
ON
IC001
REMOTE
CONTROL
RECEIVER
FP-575
(FLEXIBLE)
S001
POWER
SW
(SEE PAGE 4-60)
J001
LANC
3-1 3-2 3-3
EVO-250

3-2. VIDEO BLOCK DIAGRAM 1

J103
S VIDEO
ACCESSORY
TIRMINAL
16
J102
VIDEO
FROM
SYSTEM
CONTROL
BLOCK (SEE PAGE 3-13)
(SEE PAGE 4-58)
IO-62
BOARD
CN103
(SEE PAGE 4-55)
EX-34
BOARD
CN204
V/Y IN
3
C IN
20
V OUT
1
CN203
IC117
24
IC117
99
IC119
4
IC117
34
IC117
22
4
7 1
10
2
2
19
13
CS I/O
CK CONT
VC SCK
VC SO
DA STB
A3.2V
A4.9V
FP-573
(FLEXIBLE)
CN002
Y I/O
4
7
1
10
2
(FLEXIBLE)
2
19
13
FP-570
5
C I/O
8
S JACK
1
V I/O
11
V JACK
2
CN001
V/Y IN
2
C IN
19
V OUT
13
(FOR CHECK)
EVR D/A CONV.
SCK
2
SI
1
DA STB
3 20
D3.2V(VDD1)
8
A4.9V(VDD2)
31
A4.9V(VCC)
29
VC-197 BOARD
CN107
6
7 1
12
2
CN109
2
19
Q1309
BUFFER
13
CN207
EZ V OUT
9
IC108
IR CONT AGC CONT1 AGC CONT2
SP VOL
1.5M DEV
1.7V DEV AU BPF
AU FADE
CFG DUTY
VREF Y
VREF C REC
VREF C EE
(3V) (5V)
AGC RF CONT
FRQ TUNE
VREF BAD
VREF RF
DOC DET
RF AGC CONT
RP IR
AFC FO ADJ
MT FQ
REC L CONT
REC Y/MT CONT
VIDEO CAR VIDEO DEV AUDIO DEV
V ON
MT Q
SWP
(SEE PAGE 4-15,29,34)
S JACK IN
IC1952
V JACK IN
IC1952
Q1352 Q1354 Q1355
43 12 13 14
EVR
20
EVR
44 46 45 47
21
18 17 16
37 22
28 27 26 25 24 23 36 35 34 33 30
39 40 38
EVR EVR EVR
EVR
EVR EVR EVR
EVR EVR EVR EVR EVR EVR EVR EVR EVR EVR EVR
44
TO
AUDIO
46
BLOCK
45
(SEE PAGE 3-15)
47
TO
SERVO
21
BLOCK
(SEE PAGE 3-10)
18
TO
VIDEO 2
17
BLOCK
16
(SEE PAGE 3-7)
28 27 26 25
TO
24
VIDEO 2
23
BLOCK
36
(SEE PAGE 3-7,8)
35 34 33 30
67
MODE
CONTROL
66
BLOCK
(SEE PAGE 3-18)
Q1350
TO
SIGNAL SELECTOR
62 58 60
51 64
1
Y
25
V
29
C
17
V
27
IC129
CS
AGC
AGC
SCK
8 79
D1602
IC129 %£ REC
0.52Vp-p
H
Q1351,1353 Q1356,1357
TRAP
ADJ
Q1305
49
TRAP
BURST
LOCK
MON DDS B1
0.8Vp-p
EXTAL
3937
X1305
CK Q D Q
1 23 5
(SEE PAGE 3-16)
MON DDS W1
LPF
BPFDDS
DOS
IC205
CLOCK DIVIDE
FROM AUDIO
BLOCK
IC361 $¡ PB
IC109 IC109
Y OUT
C OUT
BCL IN
BPF
IC129 #∞ REC
14.3181MHz
YX
AGC CNT2
6347
IC204
24
X1601
28.636363MHz
53
DOS
XTAL
14.318MHz
LPF
AGC CNT1
IR CONT
SI
61
DOS B
4FSC
Y IN
C IN
Y C
50 52
IC129 $§ REC
46
44
42
22 20 12 35
3
5
15 13
5
2
H
HP L
HP/LINE R
IC206
1Vp-p
0.38Vp-p
H
IC129 $¢ REC
0.3Vp-p
H
...
12 17 33 43
S/H
41 1635
IC111
SERIAL INTERFACE
V DATA
8
SYNC
17
RESET
28
BUSY
29
CS
13
SCK
12
ADI
10
IC361
MIX
DRV
A3.2V
VDD
DRIVE
OSC1 OSC2
SDO
31 32
11
24
22
A/D
CONV.
D0-9
IC112
5
7
Q352,353
LED
DRIVE
IC102 IC101
IC114 IC114 IC106
82 73
8 7
TO/FROM
VIDEO 2
BLOCK
(SEE PAGE 3-7,3-8)
52 50 94
(SEE PAGE 4-39)
CN361
3
IR-29
BOARD
Q365
LED
DRIVE
(SEE PAGE 4-36)
MT5V
F361
D362 D363
2
10
11
3
HI SI
CN108
10
4
AD1-10 IC106
PB/REC PB C
MCK CL FSC
FP-572
(FLEXIBLE)
IR EM
4 3
IC203
S/H,AGC
10BIT A/D CONV.
Q1605
BUFFER
CLK ERR
IC102
71
C IN
IC103
25
VOB1
IC104 IC104 IC104 IC130
Q1203
IC106
IC361 7 REC/PB
3.58MHz
11 12
TO/FROM
VIDEO 2
15
BLOCK
2
(SEE PAGE 3-7,8)
10
TO/FROM
MODE
CONTROL
BLOCK
(SEE PAGE 3-18)
41
35 39
7
46 48
0.2Vp-p
VIDEO
SIGNAL
PROC.
IC1952 IC1952 IC1952
IC1952 IC1952
IC1952
IC1952
IC1952
IC1952
9 68 23
35 34
33
59
36
43
27
AUDIO
SIGNAL
PROC.
45
IC129 3 REC/PB
H
IC129 5 REC/PB
Q1306 Q1307
AMP TRAP
SYS RESET
UVIC BUSY
UVIC CS
HI SCK
HI SO
HI SI
SIRCS ENV
SIRCS CAR
IR ON
HPF
VOW1 VBO 4FSC
Y OUT
C OUT
7
3
6
1
34
36
0.5Vp-p (NTSC)
0.4Vp-p
H
Q1362
BUFFER
14
STBY
AMP
25 16
Q351
15
CLP
CENTER
BIAS
AMP
LINE
PB
AGC
RF CONT REC/PB
Q1360
Q1361
BUFFER
IR TRANSMITTER
18
3-4 3-5 3-6
IC102 @™ REC
IC103 @∞ REC
IC101 7 PB
IC101 5 REC
EVO-250
IC101 3 REC

3-3. VIDEO BLOCK DIAGRAM 2

VC-197 BOARD
(SEE PAGE 4-11,19,21,27)
IC105 ^ª REC/PB
1.0Vp-p
IC114
...
7 8 19 31
71
IY1-8 OY1-8
78
3
IC1-4 OC1-4
6
IFLD
67
IVD
66
IHD
65
MCK
52
CL
50
TBC VD
36
VRSTL
54
SCK
46
44SI45SO55
VC SCK
VC SO
IC105 $¶ REC/PB
H
IC106 $§ REC/PB
V
0.4Vp-p
H
16
TO/FROM
SYSTEM
CONTROL
BLOCK (SEE PAGE 3-13)
(SEE PAGE
3-4,5,6)
H
IC114 ^§ REC/PB
V
3Vp-p
IC114 ^∞ REC/PB
52 11
4 34 33
12 23 21
TBC VD
TBC V RST
VC SCK
VC SO
VC SI
SYS V
CS SYS
RST SYS
2.8Vp-p
H
IC117 IC117
IC119 IC117 IC117
IC117 IC117 IC117
IC106 $º REC/PB
14.318MHz
FROM
VIDEO 1
BLOCK
IC206 IC206
IC203
IC129
IC129
IC129
2.6Vp-p
MCK
3
CL
6
2
10
AD1-10
10
Y OUT
3
C OUT
5
EVR
17
EVR
16
4FSC
35
IC106 !º REC/PB
3-7 3-8 3-9
D3.2V
VDD1-7
TBC/CNR
PROC.
VC SI
IC105 #∞ REC
...
32 51 68
OFLD
OVD OHD
SYS V
RST
11CS45 53
SYS V
RST SYS
CS SYS
2.8Vp-p
7.16MHz
30
8
23
15
4
12
16 17 18
3Vp-p
BUFFER
Q1221
IC106 @ª REC
2V
3Vp-p
FROM
VIDEO 1
BLOCK
(SEE PAGE 3-4)
D3.2V
A3.2V
VC SCK VC SO VC SI
SYS V CS SYS RST SYS
SYS V CS SYS RST SYS
VC SCK VC SO VC SI
MFLD MVD MHD
Q1220Q1203
TRAP
IC130
24
3Vp-p
MCK CL
MCK CL
FROM
VIDEO 1
BLOCK
(SEE PAGE 3-5)
Q1043 Q1045
PR RF
0.4Vp-p
0.5Vp-p
+B
IC203 IC129
Q1351,1353
IC203
PB +BRP4.9V
36 44
41
MCK
PB C
C IN
CLK ERR
PB/REC
IC102
71 25
51
9
43
73
8
80
38
40 41
1
FROM MODE
CONTROL
BLOCK (SEE PAGE 3-18)
FROM MODE
CONTROL
BLOCK
(SEE PAGE 3-18)
VREF RF
I/O1-9 MOD
Y
PROC.
PBO1-8 PBI1-8
AFC
TG
BCK
CK
SWP
MEMHD
VIHD
3
39
58
59 4
VIHD
SWP
MEMO HD
CK CONT
HD CL
D3.2V
IC1952
9
IC1952
24
IC1952
35
IC1952
34
IC1952
33
IC1952 IC1952 IC1952
BCK3.2V
37 72 DVDD
MOD D/A
DEMOD
PLL
FRF2
SCK
62
65SI64SO66
VC SCK
VC SO
VC SI
SYS RST
CS VSC
HI SCK
HI SO
HI SI
OSD SCK
46
CS OSD
44
OSD SO
45
.
V
(FOR CHECK)
16
CN207
AFC FO
Q1201 Q1202
VCO
PDET2
YB1-9
AD1-10
AFCO
CGVDO CGHDO CGCKO
HEAD
CSYNC
MUTE
DOC36VOB
43
DOP
MUTE
VDD1
VDD6
VCCD R VCCD E
VCCA R VCCA E
OUT R
D/A
AUDIO
OFSC
PDET3
JVDI
FLD
VOB
SWP
RF
37
VOW
100
41 49
85 76
57
33 34 35
93 92 90 89 27
94
94 41
53 70 83 96
19
15
64 73
37 30
14
23 27
29 68
26 94
94
Q1223,1224
BUFFER
MECHA FLD
D3.2V
...
..
5
A3.2V
9
10
9
10
CGVD CGHD CGCK
SWP
JOG VD
MECHA VD
CSYNC
8
SWP
1/2 SWP
EVR
23
EVR
18
71 60 62 66 54 55 56
14
DVDD1
40 75
...
DVDD4
99
6
YMO1-8
8
13
59
AVDD1
63
..
68
AVDD3
15
YMI1-8
8
22
A OUT
6769 67
25
MEM FLDI
66
24
MEM VDI MEM HDI
65
23
SCK
97
SI
95
SO
96
SYS V
86
CS
98
RST
100
MCK
87
VCK
91
MCK
40 71
.
VXO
98
SYS V
69
CS
63
RST
62
SCK
64
SI
66
SO
65
58
MFLD MVD
59
MHD
60
ADI
82
1-10
10
73
MEMCI
49
1-4
4
52
MEMCO
54
1-4
4
57
510
6722
OUT E
6710
REXT R
676618
REXT E
6
VTR
673
BCLK
6742
OSCI
VREF
AMPO
OSCO
Y
PROC.
LINE
D/A
LOCK
AFC
SHDO30YCORRY
VIFLDO4VIVDO3VIHDO
5
32
2 46 47 44 45 38
SHD
VIVD
VIHD
VIFLD
IC106
C
PROC.
D/A
PDET1
IC105
MECHA VD
39
YCORRY
ADO1-10
REC I1-8
AGC SLOW
HEAD CHG
IC106 !¢ REC/PB
H
H
DOP
CGVD CGHD CGCK
VOB2 VOW2
DOP
L704
L703
A3.2V
.
23 31 AVDD
PB REC
ADCK CONT
ADCK2
DOP
SYS V
RST
11CS61 60
SYS V
RST SYS
CS SYS
16 14 39
8
59
.
63
.
68
24 27
26 28 30
25
SWP
0.3Vp-p
22
8
13
8
20
AD
11719
6 18
5
SP
10
IC103 @¶ PB
E
9
IC701
PCM MOD
OSC REF MASK
VDD
RAMP CONT CLR CS
SCK SI SO
RF
IC104
CHARACTER GENE.
PCL
4
V SYNC
19
H SYNC
20
OSC
8
VBLK2
13
VC2
14
CLK
1
CS
2
DATA
3
4
16
9
5
0.1µsec
RAMP
COMP COMP
REC
REC
Q1151
BUFFER
VREF BAD
A/D
IC103
8BIT A/D
6 26 17
A4.9V BCK3.2V
AF
45
42
46
44
47
EQ
5 4 7
VDD
5
VBLK1
11
VC1
12
VBLK
15
VR
16
VG
17
VB
18
190mVp-p
H
EVR
27
FROM
VIDEO 1
EVR
28
BLOCK
EVR
25 (SEE PAGE 3-4)
LPF
PB C
7
REC Y
5
3
PBY
11
15
Q1036,1038
RF AGC
SW
Q1136
TIME
CONST
Q702,703
BUFFER
REC C
DOP11AGC TC
12 61
Q1025
Q1034
Q1029Q1037
REC
BUFFER
EQ
23
LINE
PB
Q1139
ME/MP
25
27
SW
0.4Vp-p
Q705
BUFFER
Q1138
BUFFER
Q704
MP/ME
SW
64
AGC
AF
Q701
AMP
RP4.9V
BPF
REC PCM
PCM REC
62
11
28 4
24 26 33 34 35 36
10
RAMP
(SEE PAGE 3-4)
FROM
VIDEO 1
BLOCK
EVR
EVR
EVR
EVR
14
8
6
20
IR CONT
DOC DET
LOW CONT
Y LEVL MTG
DECK
SP/LP
11
22 63
Q1018
PAL ONLY
0.1µsec
EVR
EVR
29
MT Q
MT FQ
GCA
MIX AMP
REC ATF
AFM13AGC
1
IC101 ^¡ REC
0.3Vp-p
D3.2V
SWP
AU IN/OUT Q1493,1494 FSC
SWP FSC VOB1 VOW1 VBO
IC109
29
EVR
30
IC1117IC361
31
IC129
22
IC129
20
IC129
12
TO/FROM
AUDIO
BLOCK
(SEE PAGE 3-15)
TO
VIDEO 1
BLOCK
(SEE PAGE 3-4,5,6)
V
0.4Vp-p
Q1014
RP MODE
SW
Q1041
Q1033,1135
BUFFER
Q1040 Q1044 Q1140
E/L SW
IC101 !¶ PB
IC101 ^™ REC
V
PB RF
PEAKING
V
PB C
9
Q1150
PB C AMP
Q1100
PAL ONLY
IC101 !¡ PB
0.1µsec
Q1030 PB RF
EQ
0.3Vp-p
3.2Vp-p
54
Q1013
MUTE
56
Q1015
MUTE
Q1026 Q1028
TRAP
Q1141
H
0.4Vp-p
53
55
PB PCM
19
PB RF
17
16
PB RF
AMP
6
IC101 @¡ REC/PB
33.3msec
0.32Vp-p
IC101
REC/PB AMP
SW
SW
RP PB MODE
Q1016
BUFFER
PB RF REC AFM
PB RF REC ATF
VCC
REC AMP
REC AMP
REC LP2 REC LP1 REC SP1 REC SP2
SWP
IC109 IC109
(SEE PAGE 3-15)
IC120 IC120
(SEE PAGE 3-10)
22 24
31 13
3Vp-p
46 35 18 26
33 37 44 48
32 38 43 49
27 25 24 23
21
TO/FROM
AUDIO BLOCK
TO/FROM
SERVO BLOCK
L1002
L1005
SWP
IC101 $¢$• PB
RP4.9V
MUTE
Q1004 Q1010
MUTE
Q1005 Q1011
V
NTSC ONLY
Q1007 Q1009
MUTE
MUTE
Q1006 Q1012
2Vp-p
Q1001-1003,
Q1008
FLYING
ERASE
OSC
PB RF
PB PCM
REC RF
SWP
RF AGC IN
RF AGC OUT
FE ON REC LP2 REC LP1 REC SP1 REC SP2
REC PB MODE
MP/ME
SWP 1/2 SWP JOG VD MECHA VD MECHA FLD C SYNC CK CONT
CN101
CN207
2
4
10
12
16
6 1
(FOR CHECK)
2 3 7
15
IC117 IC117 IC117 IC117 IC117
IC117
IC117
IC117 IC117 IC117 IC117 IC117 IC117 IC117
VIDEO
HEAD LP2X
LP1X
SP1X
SP2X
FLYING ERASE
2 94 96 93 95
5
6
4
3 92 51 54 53 99
TO/FROM
SYSTEM
CONTROL
BLOCK (SEE PAGE 3-13)
EVO-250

3-4. SERVO BLOCK DIAGRAM

B-MECHA
(SEE PAGE 4-44)
CAPSTAN FG
IC121 !• REC/PB IC117 %¶ REC/PB
2.78msec
(1/2)
VCC
CFG(+)
CFG( )
IC121 !¡ REC/PB IC117 %§ REC/PB
34msec
IC117 ^¶
DRUM
FG
PG
IC001
CAP FG
WAVE
SHAPER
11.89MHz
RUM FG
FG/PG COM
DRUM PG
(1/2)
3Vp-p
3
2
1
3
12
11
3Vp-p
(FOR CHECK)
1.7Vp-p
VC-197 BOARD
CN104
3
2
1
CN103
3
CAP FG
12
OFFSET ADJ
11
CN207
4
CAP FG
LPF
14
13
D3.2V
CFG DUTY
FROM
VIDEO 1
BLOCK
EVR
(SEE PAGE 3-4)
IC117 %• REC/PB
1.2msec
(SEE PAGE 3-13)
(SEE PAGE 3-9)
(SEE PAGE 4-37)
IC121
(1/2)
DRUM FG/PG
WAVE SHAPER
WAVE
SHAPER
VREF
WAVE
SHAPER
21
EVER 3.15V
TO/FROM
SYSTEM
CONTROL
BLOCK
FROM
VIDEO 2
BLOCK
X1752
11.89MHz (NTSC)
11.72MHz
(PAL)
3Vp-p
IC117 IC119 IC117
IC120(1/2)
IC101
IC101
1815
11
34
4
5
17
63
IC117
SERVO CONTROL
DRUM FG
57
DRUM PWM
DRUM PG
56
CAP PWM
OSC0
68
OSC1
67
ATF ERR AD
REF PILOT
CAP FG
58
CFG HMS
30
DRUM ON
VDD VPP
86
AV REF
76
A VDD
77
CAP ON
VDD
42
VDD
87
CAP FWD
ATF 5.9M
ATF STBY
VC SO
VC SCK
RP PB MODE
29
PBRF
REC ATF
(2/2)
CS ATF
IC117 $¢ REC/PB
26µsec
44
LPF 8
43
LPF
71
66
ATT
1
89
90 69
26 97
3Vp-p
IC122
6
IC117 $£ REC/PB
26µsec
17 5
CLK 5.9M
CS
21
STBY
14
S IN
20
SCLK
19 11
31
13 LPF
LPF
AMP
LPF
(4/4)
FRB
3Vp-p
REF PILOT
MODULATOR
DD-100 BOARD
(SEE PAGE 4-65)
14
CN106
9
10 12
11
0.22V
Q1851
ERROR
7
AMP
DRUM ERROR
9
CAP ERROR
10
CN502
9
10
IC117 ^ª REC/PB
LPF
3Vp-p
6
30
AVDD
5.94MHz
L1753
16kHz
BPF
46kHz
BPF
D3.2V
18
DVDD
23LPF 7
17 16 15
CT
22
LPF
RT
21
10 11 12
9
IC501 ^¢ REC/PB
506kHz
IC120
ATF SERVO
(2/2)
9
8
IC501
DRUM/CAPSTAN
PWM DRIVE
SHORT CIRCUIT
PROTECT
PWM
PWM
SHORT CIRCUIT
PROTECT
VREF
0.7Vp-p
10
(2/2)
SWITCHING
DRIVE
OUTPUT
SWITCHING
DRIVE
FROM
CONTROL
(SEE PAGE 3-18)
7
OUTPUT
DRIVE
BUFFER
R1851-1853
DRUM DRIVE
MODE
BLOCK
IC121
MOTOR DRIVE
OUTPUT
DRIVE
ICOM
DRUM
30
COM
U IN V IN
W IN
(2/2)
U V W
(SEE PAGE 4-44)
(2/2)
M901
28
CN104
26 27 25
1 2
29
4
10
.
9
8
.
7
6
.
5
DRUM COM
DRUM U
DRUM V
DRUM W
4
10
. 9
8
. 7
6
. 5
B-MECHA
DRUM MOTOR
8
CONTROL
LOGIC
LCD DD ON
58
VTR DD ON
29
VTR UNREGD3.2V
VCC2
CURRENT SENS
IC1952 IC1952
29 30
VTR UNREG
64
5,6
63
4
SWITCHING
L505
VTR UNREG
SWITCHING
L504
CN502
Q502
Q501
42 27
4
.
3
2
.
1
LCD DD ON VTR DD ON
DRUM VS
CAP VS
42 27
4 3
2 1
CN106
.
.
VCC1
VS
6
STBY
STBY
3
IC121 12@ª REC/PB
5.6msec
1Vp-p
IC501 4 REC/PB
CN103
506kHz
0.7Vp-p
CAP VS
VTR UNREG
CAP ON
CAP FWD
5
5
.
.
6
6
HE
POWER
VS
M902
CAPSTAN
MOTOR
CAP U
U
CAP V
V
CAP W
W
VH + VH
H1 (+)
H
H1 ( ) H2 (+)
H
H2 ( ) H3 (+)
H
H3 ( )
4
4
10
10
9
9
H1 (+) H1 ( )
H1 (+) H1 ( )
H1 (+) H1 ( )
VCC
STBY
FRC U IN1
U IN2
V IN1 V IN2
W IN1 W IN2
POWER
OFF
120°
LOGIC
16
IC120 #¡
V
0.3Vp-p
IC120 !£ REC
5µsec
0.35Vp-p
IC120 2 REC/PB
V
0.4Vp-p
IC120 3 REC/PB
V
0.4Vp-p
3-10 3-11 3-12

3-5. SYSTEM CONTROL BLOCK DIAGRAM

EVO-250
VC-197 BOARD
FROM
VIDEO 1
BLOCK
(SEE PAGE 3-4)
TO/FROM
VIDEO 2
BLOCK
(SEE PAGE 3-7,3-9)
TO/FROM
AUDIO BLOCK
(SEE PAGE 3-15)
TO/FROM
SERVO BLOCK
(SEE PAGE 3-10)
(SEE PAGE 4-37,41)
IC206
7
IC129
9
IC129
8
IC129
7
EVR
3
IC102
39
IC114
46
IC114
44
IC114
43
IC114
36
IC114
54
IC114
55
IC114
45
IC114
53
Q1008
IC101
27
IC101
25
IC101
24
IC101
23
IC101
21
IC106
68
Q1025
REC PB MODE
IC101
16
IC105
92
IC105
90
IC105
89
IC105
27
IC109
59
IC109
60
IC109
20
IC109
31
IC109
58
IC120
11
IC120
19
IC120
20
Q1751
CK CONT
CS I/O
VC SCK
VC SO
DASTB
CK CONT
VC SCK
VC SO
VC SI
TBC VD
TBC VRST
SYS V
CS SYSTEM
RST SYSTEM
FE ON REC LP2 REC LP1 REC SP1 REC SP2
SWP
1/2 SWP
MP/ME
JOG VD
MECHA VD
MECHA FLD
C SYNC
VC SCK
VC SO
VC SI
SWP
CS AU
RP PB MODE
VC SCK
VC SO
SP IN
VC SCK VC SO VC SI
2 3 4
29
EEPROM
SCK DI DO
IC116
VCC
CS
RST
IC117 (£(∞ REC
33msec
IC120
SP/LP
DET
CLOG
DET
IC119
1,2
4
8 1 6
(1/2)
D3.2V
22
24
3Vp-p
SYSTEM CONTROL
CS EEPROM
37
WE EEPROM
36
CK CONT
99
CS I/O
24
DASTB
22
TBC VD
52
TBC VRST
11
SYS V
12
CS SYSTEM
23
RST SYSTEM
21
FE ON
2
94
REC LP2 REC LP1
96
REC SP1
93 95
REC SP2
SWP
4
1/2 SWP
3
RP PB MODE
5
JOG VD
92
MECHA VD
51
MECHA FLD
54
MECHA HD
53
25
CS AU
SP DET
8
CLOG DET
7
35
VC SCK VC SO
34
VC SI
33
LCD HOLD
91
IC117
LM LMT CONT
LM LIM ON
HI8 MP SW
REC PROOF
TAPE LED ON
S REEL FG AD
T REEL FG AD
REEL HALL ON
(1/2)
VC STBY
RST VC
CS VC
HI SCK
HI SO
HI SI
MSWA MSW B MSW C
VDD
AVREF
AVDD
VDD VPP
LOAD
UNLOAD
ME SW
TAPE TOP
TAPE END
EXTAL
XTAL
SWP SYS V
31 38 59
62 60 61
VC STBY VC RST CS VC
HI SCK HI SO HI SI CC DOWN
IC1952 IC1952
IC1952 IC1952 IC1952
IC1952 IC1952 IC1952 IC1952
63 62
TO/FROM
MODE
11
CONTROL
10
BLOCK
(SEE PAGE 3-18)
22
35 34 33 18
(SEE PAGE 4-44)
B-MECHA
S901
14 15 16
EVER
3.15V
42 76 77 87 86
46 47 98 32
6 28 17
D3.2V
VTR UNREG
VCC1
3
VCC2
4
DEC1
24
DEC2
25
LIMIT ENABLE
26
LIMIT OUT
27
MOTOR DRIVE
IC122
TAPE TOP/END
DETECTOR
49
50
48
83
72
27
41
X1751
20MHz
40
14 13
17 16
Q1854
LED
DRIVE
IC122
WAVE SHAPER
20
23
IC117 $º REC/PB
WAVE
SHAPER
IC122
LOADING
(2/4)
TOP INTOP OUT
END INEND OUT
(3/4)
(1/4)
VM
OUT1
OUT2
18 19
21 22
5
2
29
MT5V
D3.2V
CN105
MT 5V
CN102
MSW A
7
MSW B
6
MSW C
5
LM +
1
LM +
2
LM
3
LM
4
C LOCK SW
2
MP/ME SW
10
HI8 MP SW
13
REC PRF SW
9
TAPE TOP(C)
14
TAPE END(C)
8
TAPE LED(A)
7 7
TAPE LED(K)
2 2
D3.2V
3 3
S REEL( )
12 12
S REEL(+)
11 11
T REEL( )
5 5
T REEL(+)
44
HALL COM
6 6
7 6 5
1 2
3 4
2
10 13
9
14
8
MODE SW
M
CC DOWN SW
Q001
TAPE TOP
SENSOR
Q002
TAPE END
SENSOR
TAPE LED
H
M903
LOADING
MOTOR
S001
S002
D001
H
H002
S REEL
SENSOR
H001
T REEL
SENSOR
20MHz
16
3.2Vp-p
3-13 3-14
EVO-250

3-6. AUDIO BLOCK DIAGRAM

FOR
CHECK
VC-197 BOARD
CN207
BPF MON
14
REC AFM
8
FROM
VIDEO 1
BLOCK
(SEE PAGE 3-4)
FROM
VIDEO2
BLOCK (SEE PAGE 3-8,3-9)
IC109 @™ PB
V
IC109 @¢ REC
1.5MHz
IC109 @ª REC/PB
3.58MHz
TO/FROM
SYSTEM
CONTROL
BLOCK (SEE PAGE 3-13)
EVR
47
EVR
45
1.5M DEV
EVR
44
1.7M DEV
EVR
46
Q1141 IC101 IC106
IC117
IC117 IC117
IC119 IC117
IC109 #¡ REC/PB
94
140msec
0.22Vp-p
0.2Vp-p
33 34
25
REC AFM
1
4
4
33msec
(SEE PAGE 4-49)
AFADE
AU BPF
PB RF
FSC
A4.9V
A3.2V
SWP
VC SI
VC SO
VC SCK
CS AU
3Vp-p
3
26
36 16
22 24 29
54
56 63
31
20 60
59 58
23
PB1.5M
BPF
PB1.7M
FROM
VIDEO 2
BLOCK
(SEE PAGE 3-8)
FROM
VIDEO 1
BLOCK
(SEE PAGE 3-4)
TO/FROM
MODE
CONTROL
BLOCK
(SEE PAGE 3-18)
AFM PROCESSOR
MOD/
DEMOD
ST/MONO
DET
BUS
DECODER
IC106
EVR
IC1952
IC1952
IC1952
IC1952
IC109
26
20
5
6
78
60
NR
MX
MTX
NR
AU IN/OUT
SP VOL
SP SEL
SP ON
HP ON
BEEP
AGC
LINE HP(R)
POWER MUTE
Q1493,1494
Q004
A(L) A(R)
LINE(L)
LINE(R)
HP(L)
LINE(L)
BUFFER
Q003
(SEE PAGE 4-55)
FP-570
23
.
26
6 4
17
15
CN001 CN002CN107
16
AUDIO R I/O
19
(FLEXIBLE)
ADI UNREG
AUDIO L AUDIO R
EZ AL
EZ AR
FP-573
(FLEXIBLE)
AUDIO L I/O
23
.
26
6 4
17
15
14
16
HP L HP/LINE R
62
4
64
2
50
49
52
53
32
ON/OFF
MUTE SW
IC361 IC361
Q1491
Q1492
Q1488
46
VIDEO 1
48
BLOCK
(SEE PAGE 3-5)
Q1487 MUTE
Q1486 MUTE
Q1490 MUTE
Q1489 MUTE
TO
ADI UNREG
CN109
23
.
26
6 4
17
15
15
20
EX-34
BOARD
CN203 CN204
23
ADI UNREG
.
26
AUDIO L
6
AUDIO R
4
EZ AL
17
EZ AR
15
(SEE PAGE 4-58)(SEE PAGE 4-54)
IO-62
BOARD
CN103
14
16
18
.
19
6
5
CONNECTOR
15
14
EASY
L
(MONO)
R
AUDIO
IN
IC001
J002
Q002
Q001
2 4
3
1
12 10
9
8
HP/SP AMP
L IN R IN
MUTE
SP VOL
SP SEL SP ON SP SEL
BEEP
HP L
HP R
SP+ SP
Q010
19
18
20
13 14
LINE AMP
Q007
LINE AMP
AU4.9V
Q009
MUTE
Q008
MUTE
Q1956
43
44
19
40
28 27
44
43
JACK MONO
20
39
27 28
HP L2
HP R2
HP SENS
SP1 SP2
41
41
40
40
17
17
36
36
24
24
25
25
CN104
CN106
CN001
7
2 1
1 2
7
2 1
FP-574
(FLEXIBLE)
SP901
(SPEAKER)
IC1952 IC1952
16
JACK MONO
65 70
HP SENS
3-15 3-16

3-7. MODE CONTROL BLOCK DIAGRAM

S006 S005 S003,004 S002 S001
REW
IO-62 BOARD
S106 S105 S101
VOLUME
J001 LANC
VOLUME
+
FP-575 BLOCK
(FLEXIBLE)
S001
POWER
(SEE PAGE 4-60)
FF REC PLAY
FK-71 BOARD
(SEE PAGE 4-47)
(SEE PAGE 4-58)
S107
SEL/PUSH
EXEC
1
6 2
J102
RFU DC
OUT
CONTROL
DIAL
D3.2V
CN105
1
6 2
S008 S007
SLOW PAUSE
S010
COUNTER
RESET
CN103
S102
MENU
LASER
LINC
D109
S009
DISPLAY
D002
(REC)
D006
(PAUSE)
31
33
34 32
28
22
19 21
12
STOP
CN001
3
4
5
8
10
(SEE PAGE 4-60)
CN002
KEY AD3
31
DIAL A
33
DIAL B
34
KEY AD6
32
IR LED ON
28
VTR MODE SW
22
LANC DC
19
LANC SIG
21
RF DC OUT
12
FP-573
(FLEXIBLE)
KEY AD0
KEY AD1
KEY AD2
REC LED
PAUSE LED
CN001
34
36
37 35
32
25
22 24
13
VC-197 BOARD
CN110
3
4
5
8
10
33
35
38 36
31
26
21 23
14
CN107
Q1961
LED
DRIVE
VTR
UNREG
VCO
S1952
(EJECT)
UNREG
1
LANC DC
14
LANC I/O
11
VCC
8
Q1358,1359
CURRENT
LIMIT
(SEE PAGE 4-45)
IC1995
LANC I/O
POWER
DATA I
DATA O
WAKE
A4.9V
EVO-250
IC1952
MODE CONTROL
KEY AD0
92
KEY AD1
93
KEY AD2
94
REC LED
21
PAUSE LED
7
EJECT SW
17
KEY AD3
95
MENU A
84
MENU B
85
KEY AD6
98
IR LED ON
20
VTR MODE SW
14
LANC ON
3
4 12 10
9
LANC OUT
2
LANC IN
1
LANC PWR ON
19
S JACK IN V JACK IN
SIRCS ENV
SIRCS CARRIER
IR ON
UVIC BUSY
UVIC CS
UVIC BUSY
SYS RST
CS VSC
OSD SCK
CS OSD OSD SO
HI SCK
HI SO
HI SI
SWP
SYS V
VC STBY
VC RST
CS VC
CC DOWN
CS LCD D/A
ALTERNATE
PANEL JOG
LCD DD ON
67 66
59 36 43
68 23
Q1960
64
9
24
46 44 45
35 34 33
63 62
11 10 22
18
27 57 56
58
S JACK IN V JACK IN
SIRCS ENV SIRCS CARRIER IR ON
UVIC BUSY UVIC CS SYS RST
HI SCK HI SO HI SI
SYS RST CS VSC
HI SCK HI SO HI SI
OSD SCK CS OSD OSD SO
HI SCK HI SO HI SI
SWP SYS V
VC STBY VC RST CS VC
CC DOWN
LCD DD ON VTR DD ON
CN107 CN107
Q351 Q351 IC361
IC111 IC111 IC111
IC111 IC111 IC112
IC701 IC701
IC701 IC701 IC701
IC104 IC104 IC104
IC117 IC117 IC117
IC117 IC117
IC117 IC117 IC117
CN102
IC501 IC501
1 2
C B
14
TOFROM
VIDEO 1
29
BLOCK
(SEE PAGE 3-5)
13 28
12 10
3
,IC104
24
27
26
28 30
1 2 3
62
60 61
4
TO/FROM
SYSTEM
12
CONTROL
BLOCK
31
(SEE PAGE 3-14)
38 59
2
TO
29
SERVO
30
BLOCK
(SEE PAGE 3-12)
4
TO/FROM
VIDEO 2
BLOCK
(SEE PAGE 3-8)
3-17
IC001
REMOTE
CONTROL
RECEIVER
D3.2V
FP-574
(SEE PAGE 4-57)
(SEE PAGE 4-36)
CN001 4 1
D001
(POWER ON)
(FLEXIBLE)
12 10
6
EASY
CONNECTOR
IR-29
BOARD
S361
P CLOSE
CN104 CN103
A4.9V
12
SIRCS
10
PWR ON LED
6
IO-62
BOARD
(SEE PAGE 4-58)
CN204 CN203
LANC SIG
8
ID1
11
ID2
17
EX-34
BOARD
(SEE PAGE 4-55)
CN361
5
5 8 8
FP-572
(FLEXIBLE)
45 47
46
8 10 11
CN002 CN001
45 47
PWR ON LED
46
FP-573
(FLEXIBLE)
LANC SIG
8 10 11
FP-570
(FLEXIBLE)
A4.9V
SIRCS
ID1 ID2
CN108
IC1952 %™ REC/PB
A4.9V
48
47
50
49
49
50
CN107
8 10 11
CN109
8 10 11
16
Q1957
LED
DRIVE
IC1952 $¡ REC/PB
20MHz
32.768kHz
1.7Vp-p
2.3Vp-p
X1951
32.768kHz
X1952
20MHz
KEY AD5
97
SIRCS IN
4
POWER LED ON
82
32kHz IN
52
32kHz OUT
53
SHOE ID1
73
ID2
83
20MHz IN
41
20MHz OUT
40
BACKUP VCC
LIPREEND
BATT SENS
VTR DD ON
DC PACK SW
DRY BATT
JACK MONO
BATT IN
RESET
SHOE ON
BATT SI
BATT SO
SP SEL
SP ON HP ON
BEEP
HP SENS
42 51
..
75 77 86
..
87 61
69 38
71
29 32 47 80
48 49
5
6 78 60 65 70
D1956
S1951
(RESET)
Q1959,1963
IF
BLOCK
SP SEL Q004 SP ON Q003 HP ON Q002 BEEP JACK MONO HP SENS
IC1951
BACKUP VCC
INTIAL RESET V OUT7V IN
6
CS
4
PREEND
2
RESET
5
VR O
VBAT
IC001 CN107 CN107
D1955
8 3
TO/FROM
AUDIO
18
BLOCK
(SEE PAGE 3-15)
19 40
Q1951-1954
D1952
VTR UNREG D3.2V
EVER 3.15V
A4.9V VCO
LCD DD ON VTR DD ON
DC PACK SW
SHOE ON BATT SIG
CN111
42 27 34 41 29
1
.
2 3
.
4
LI3V
TO/FROM
DD-100 BOARD
1
.
2 3
.
4
FP-571
(FLEXIBLE)
(SEE PAGE 4-47)
BT001
LITHIUM
BATTRY
3-18 3-19
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