Sony SLV-E325EG User manual

SPECIFICATIONS
SLV-E325EG/E475EG/E570EE/E570EG/E715B/E717VC/E720B/E720BZ/E720EE/
E720EG/E720EX/E720NC/E720NP/E720UX/E720VC/E720VP/E725NC
RMT-V197/V197A/V197B/V198/V198A/V198K/V198J/V199/V199A
East European Model
Greek Model
SLV-E325EG/E475EG/E570EE/
E570EG/E720EE/E720EG
French Model
SLV-E715B/E720B/E720BZ
Irish Model
SLV-E720EX
North European Model
SLV-E720NC/E725NC
Spanish Model
SLV-E720NP
UK Model
SLV-E720UX
Germany Model
SLV-E717VC/E720VC
Austrian Model
Germany Model
SLV-E720VP
SERVICE MANUAL
VIDEO CASSETTE RECORDER
MICROFILM
j
H MECHANISM
• Refer to the SERVICE MANUAL ofVHS MECHANICAL
ADJUSTMENTS for MECHANICAL ADJUSTMENTS.
(9-973-623-11)
Photo : SLV-E720B

— 2 —
1. Check theareaofyourrepair for unsolderedor poorly-soldered
connections. Checkthe entire boardsurface for soldersplashes
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, par-ticularly
transistors, that were installed during a previous repair. Point
them out to the customer and recommend their replacement.
4. Look forparts 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
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer.
[DIFFERENT SPECIFICATIONS ]

— 3 —
TABLE OF CONTENTS
SERVICE NOTE
1. HOW TO RETURN THE PINCH ROLLER, GUIDE
ROLLERAND ELEVATOR CAM TO STOP MODE ······ 4
2. HOW TO RETURNA TAPE INTO CASSETTE HALF···4
3. HOW TO REMOVE A CASSETTE FROM
A MACHINE IF A CASSETTE IS LEFT
IN A MACHINE IN TROUBLE ········································ 4
4. HOW TO REMOVE DRUM ASSEMBLY························ 4
1. GENERAL
Getting Started
Unpacking··············································································1-1
Setting up the remote commander ·········································1-1
Connecting the VCR······························································1-1
Tuning your TV to the VCR ··················································1-2
Setups – Selecting a language················································1-2
Setups – Presetting channels automatically ···························1-3
Setups – Presetting channels manually··································1-3
Setups – Setting up ShowView··············································1-4
Setups – Changing/disabling programme positions ··············1-5
Setups – Setting the clock······················································1-6
Setups – Setting the usage of 2nd Euroconnector
(SLV-E720NP/E725NP/E720VC/E717VC only) ··················1-6
Setting the PAY-TV/Canal Plus decoder
(SLV-E720NP/E725NP/E720VC/E717VC only) ··················1-7
Basic Operations
Playing a tape·········································································1-7
Recording TV programmes ···················································1-8
Recording TV programmes using ShowView ·······················1-8
Setting the timer manually·····················································1-9
Additional Operations
Playing/searching at various speeds ····································1-10
Recording TV programmes using the quick timer···············1-10
Checking/changing/cancelling timer settings ······················1-10
Recording stereo and bilingual programmes ·······················1-11
Searching using the index function······································1-11
Adjusting the picture ···························································1-12
Changing menu options ·······················································1-12
Editing with another VCR ···················································1-12
Index to parts and controls···················································1-13
2. DISASSEMBLY
2-1. CASE AND FRONT ASSEMBLY··································2-1
2-2. FR-119 BOARD (WITH DM-62 BOARD) ····················2-1
2-3. RP-217 BOARD······························································2-2
2-4.
MECHANISM DECK ASSEMBLY (H MECHANISM)···· 2-2
2-5. MA-286 AND PS-385 BOARDS····································2-3
2-6. CIRCUIT BOARDS LOCATION ···································2-3
3. BLOCK DIAGRAMS
3-1. OVERALL BLOCK DIAGRAM ····································3-1
3-2. VIDEO BLOCK DIAGRAM ··········································3-3
3-3. SERVO, SYSTEM CONTROL BLOCK DIAGRAM ····3-5
3-4. AUDIO BLOCK DIAGRAM ·········································3-7
3-5. I/O BLOCK DIAGRAM ·················································3-9
3-6. TUNER BLOCK DIAGRAM ·······································3-11
3-7. MODE CONTROL BLOCK DIAGRAM ·····················3-13
3-8. POWER SUPPLY BLOCK DIAGRAM ·······················3-15
4. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS
4-1. FRAME SCHEMATIC DIAGRAM ·······························4-1
4-2. PRINTED WIRING BOARDS AND SCHEMATIC
DIAGRAMS····································································4-4
•
RP-217 (HEAD AMP) PRINTED WIRING BOARD ··· 4-5
• RP-217 (HEAD AMP) SCHEMATIC DIAGRAM ······4-7
• MA-286 (VIDEO, SERVO/SYSTEM CONTROL,
AUDIO, TUNER) PRINTED WIRING BOARD ·····4-10
•
MA-286 (VIDEO, AUDIO) SCHEMATIC DIAGRAM ·· 4-13
• MA-286 (SERVO/SYSTEM CONTROL)
SCHEMATIC DIAGRAM··········································4-16
• MA-286 (OSD) SCHEMATIC DIAGRAM···············4-19
• MA-286 (TUNER) SCHEMATIC DIAGRAM ·········4-21
• MA-286 (I/O) SCHEMATIC DIAGRAM ·················4-23
•
DM-62 (OPERATION SWITCHES), FR-119 (MODE
CONTROL) PRINTED WIRING BOARDS ············4-25
•
DM-62 (OPERATION SWITCHES), FR-119 (MODE
CONTROL) SCHEMATIC DIAGRAMS ··················4-27
• PS-385 (POWER SUPPLY) PRINTED WIRING
BOARD AND SCHEMATIC DIAGRAM ·················4-30
5. REPAIR PARTS LIST
5-1. EXPLODED VIEWS ······················································5-1
5-1-1.FRONT PANELASSEMBLY AND CASE ····················5-1
5-1-2.CHASSIS ASSEMBLY ···················································5-2
5-1-3.MECHANISM DECK ASSEMBLY-1 ····························5-3
5-1-4.MECHANISM DECK ASSEMBLY-2 ····························5-4
5-1-5.MECHANISM DECK ASSEMBLY-3 ····························5-5
5-1-6.MECHANISM DECK ASSEMBLY-4 ····························5-6
5-2. ELECTRICAL PARTS LIST ··········································5-7
6. INTERFACE, IC PIN FUNCTION
DESCRIPTION
6-1. SYSTEM CONTROL
— SERVO PERIPHERAL CIRCUIT INTERFACE
(MA-286 BOARD IC160)···············································6-1
6-2. SYSTEM CONTROL
— MECHANISM INTERFACE
(MA-286 BOARD IC160)···············································6-2
6-3. SYSTEM CONTROL
— SYSTEM CONTROL PERIPHERAL CIRCUIT
INTERFACE (MA-286 BOARD IC160) ························6-2
6-4. SYSTEM CONTROL
— Hi-Fi AUDIO BLOCK INTERFACE
(MA-286 BOARD IC160)···············································6-2
6-5. SERVO/SYSTEM CONTROL MICROPROCESSOR
PIN FUNCTIONS (MA-286 BOARD IC160)················6-3
6-6. TUNER/TIMER MODE CONTROL PIN FUNCTION
(FR-119 BOARD IC470) ················································6-4
7. ADJUSTMENTS
7-1. MECHANICALADJUSTMENTS ·································7-1
7-2. ELECTRICALADJUSTMENTS ···································7-1
2-1. PREPARATION BEFORE ADJUSTMENT ···················7-1
2-1-1.Equipment Required························································7-1
2-1-2.Equipment Connection ····················································7-1
2-1-3.Input Signal Check ··························································7-1
2-1-4.Alignment Tape ·······························································7-1
2-1-5.Input/Output Levels and Impedance ·······························7-2
2-1-6.Adjustment Sequence ······················································7-2
2-2. POWER SUPPLY CHECK ·············································7-2
2-2-1.Output Voltage Check (MA-286 Board) ·························7-2
2-3. SERVO SYSTEM CHECK ·············································7-3
2-3-1.RF Switching Position Adjustment
(MA-286, RP-217 Boards) ··············································7-3
2-4. VIDEO SYSTEM CHECKS AND ADJUSTMENT·······7-3
2-4-1.X’tal OSC Check (MA-286 Board)·································7-3
2-4-2.SYNC AGC Check (MA-286 Board)······························7-4
2-4-3.White Clip/Dark Clip Check (MA-286 Board) ···············7-4
2-4-4.RecordingY Level Check (MA-286 Board) ···················7-4
2-4-5.Recording Chroma Level Check
(MA-286 Board)······························································7-4
2-4-6.Playback Level Check (MA-286 Board)·························7-5
2-4-7.VCO Frequency Adjustment (MA-286 Board) ···············7-5
2-5. AUDIO SYSTEM ADJUSTMENT ································7-5
2-5-1.ACE Head Adjustment ····················································7-5
2-5-2.E-E Output Level Check ·················································7-5
2-5-3.Overall Output Level and Distortion Factor Check ········7-5
2-5-4.Overall Noise Level Check ·············································7-5
2-6. ADJUSTMENT PARTS LOCATION DIAGRAM·········7-6

— 4 —
1. HOWTO RETURNTHE PINCH
ROLLER, GUIDE ROLLER AND
ELEVATOR CAMTO STOP MODE
1) Remove the VHS MD assembly from the machine. (Refer to
section 2-4. Removal.)
2) Rotate the worm gear-1 of the cam motor beneath the MD
assembly in the direction arrow Ausing a screw driver tip.
Fig. 1
2. HOWTO RETURN ATAPE INTO
CASSETTE HALF
A tape can be rewound into a cassette half by rotating the
flywheel-1 of the capstan motor in the direction of Awith hand.
Fig. 2
Flywheel-1 Timing belt
Front side
3. HOWTO REMOVE A CASSETTE
FROM A MACHINE IF A CASSETTE
IS LEFT IN A MACHINE INTROUBLE
Execute the section 2, and keep rotating the flywheel-1.
When executing section 1 to 3, take care that a tape slack
shouldnot be caught by a mechanism or a tape should not
be damaged.
4. HOWTO REMOVE DRUM
ASSEMBLY
Fig. 3
1Worm gear-1
Front side of the
machine
Cam motor
A
Drum assembly
1Remove connector
CN260 from RP-217
board.
2Screw +P3 ×8
SERVICE NOTE
SLV-E325EG/E475EG/E570EE/E570EG/E620B/E620VC/E720B/E720BZ/E720EE/
E720EG/E720EX/E720NC/E720NP/E720UX/E720VC/E720VP/E725NC

2-1
SECTION 2
DISASSEMBLY
NOTE : Follow the disassembly procedure in the numerical order given.
SLV-E325EG/E475EG/E570EE/E570EG/E715B/E717VC/E720B/E720BZ/E720EE/
E720EG/E720EX/E720NC/E720NP/E720UX/E720VC/E720VP/E725NC
2-1. CASE AND FRONT ASSEMBLY
2-2. FR-119 BOARD (WITH DM-62 BOARD)
Front Panel assembly

1
Tapping screws
3 Claws
5
3
Claws
Case
2
1 Tapping screw
s
4 Flexible flat cable
(from CN441 on DM-62 board)
(
E570 onl
y)
3 Screws
4 Claws
4 Claws
2 Flexible flat cable
(from CN163 on MA-286 board)
1 Connector
(from CN161 on MA-286 board)
Be careful
not to damage
the connector
FR-119 board
(with DM-62 board)
(DM-62 board)

2-2
2-3. RP-217 BOARD
2-4. MECHANISM DECK ASSEMBLY (H MECHANISM)
2 Connector
(from FE head)
3 Screws
RP-217 board
4
3
Screw
2 Connector
(from ACE assembly
)
1 Flexible board (from the drum )
1 Connector
(from CN101 on MA-286 board)
Mechanism deck assembly
(H Mechanism)
2 Screw
2 Screw
2 Screws
3