MICROFILM
SERVICE MANUAL
GA35ME
GA35PL
GA35PS
GA35SG
GA35TH
GA35TW
All model
names
SLV-
GF85PL
GF85PS
GF85TH
GF85TW
GA55ME
GA55PL
GA55PS
GA55SG
GA55TH
GA65MJ
SP70R
SP100R
E Model
SLV-GA35PS/GA55PS/GF85PS
ME Model
SLV-GA35ME/GA35SG/GA55ME/GA55SG
Middle East Model
SLV-GA65MJ
Philippine Model
SLV-GA35PL/GA55PL/GF85PL
Russian Model
SLV-SP70R/SP100R
Taiwan Model
SLV-CA30TW/GA35TW/GF85TW/SA33TW
Thailand Model
SLV-GA35TH/GA55TH/GF85TH
VIDEO CASSETTE RECORDER
· Refer to the SERVICE MANUAL of VHS MECHANICAL
ADJUSTMENTS VI for MECHANICAL ADJUSTMENTS.
(9-921-647-11)
* The abbreviations of CA30, GA35, GA55, GA65, GF85, SA33, SP70 and SP100 contained in this service
manual are indicated when these models are common to all their corresponding models as given below.
GA35
Abbreviated
model name
GA55
GA65
GF85
RMT-V286/V286A/V286B/V286C
SLV-CA30/GA35/GA55/GA65/
GF85/SA33/SP70/SP100
Photo: SLV-GF85
SP70
SP100
SPECIFICATIONS
Continued on next page
S MECHANISM
CA30TW
CA30
SA33TW
SA33
System
EXCEPT CA30/GA35: PL, TW/GA55PL/
GF85: PL, TW/SA33:
Color system
PAL, MESECAM, NTSC 3.58, NTSC 4.43
RF output signal
UHF channel 30 to 90
(B/G, D/K)
Aerial out
75-ohm asymmetrical aerial socket
CA30/GA35: PL, TW/GA55PL/GF85: PL, TW/
SA33:
Format
VHS NTSC standard
Video recording system
Rotary head helical scanning FM system
Video heads
Double azimuth two heads
Video signal
NTSC color, EIA standards
Maximum recording/playback time
9 hrs. in EP mode (with T-180 tape)
Fast-forward and rewind time
Approx. 4 min. 30 sec. (with T-120 tape)
Tape speed (GA55/GA65/GF85: PL, TW/SP70)
SP: 33.35 mm/s
EP: 11.11 mm/s
LP: 16.67 mm/s, playback only
Tuner section: CA30/GA35: PL, TW/GA55PL/
GF85: PL, TW/SA33
RF output channel
VHF channel 3 or 4
Antenna
75-ohm antenna terminal for VHF/UHF
Inputs and outputs
LINE 1 IN (EXCEPT CA30/GA35/SA33)
VIDEO IN, phono jack (1)
Input signal: 1 Vp-p, 75 ohms,
unbalanced, sync negative
AUDIO IN (MONO), phono jack (1)
(GA55/GA65/SP70)
AUDIO IN, phono jack (2) (GF85/SP100)
Input level: 327 m Vrms
Input impedance: more than 47 kilohms
2
SAFETY CHECK-OUT
1. Check the area of your repair for unsoldered or poorly-sol-
dered 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 transis-
tors, that were installed during a previous repair. Point them
out to the customer and recommend their replacement.
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
4. Look for parts which, though functioning, show obvious signs
of deterioration. Point them out to the customer and recom-
mend their replacement.
5. Check the B+ voltage to see it is at the values specified.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 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 PUB-
LISHED BY SONY.
LINE 1 OUT
VIDEO OUT, phono jack (1)
Output signal: 1 Vp-p, 75 ohms,
unbalanced, sync negative
AUDIO OUT (MONO), phono jack (1)
(EXCEPT GF85/SP100)
AUDIO OUT, phono jack (2)
(GF85/SP100)
Standard output: 327 mVrms
Load impedance: 47 kilohms
Output impedance: less than 10 kilohms
General
Power requirements
110 240 V AC, 50/60 Hz
(EXCEPT CA30/GA35TW/GF85TW/SA33)
110 V AC, 60 Hz
(CA30/GA35TW/GF85TW/SA33)
Power consumption
10 W (CA30/GA35: PL, TW/GA55PL/
GF85: PL, TW/SA33)
12 W
(EXCEPT CA30/GA35: PL, TW/GA55PL/
GF85: PL, TW/SA33)
Operating temperature
5
°C to 40 °C
Storage temperature
20
°C to 60 °C
Dimensions
Approx. 355
× 96 × 293 mm (w/h/d)
Including projecting parts and controls
Mass
Approx. 3.8 kg
Supplied accessories
Remote commander (1)
R6 (Size AA) batteries (2)
Aerial cable (1)
(EXCEPT CA30/GA35: PL, TW/GA55PL/
GF85: PL, TW/SA33)
Audio /video cable (3-phono to 3- phono) (1)
(GF85/SP100)
75-ohm coaxial cable with F type connectors (1)
(CA30/GA35: PL, TW/GA55PL/GF85: PL,TW/
SA33)
Design and specifications are subject to change
without notice.
· Feature Difference
SLV-
CA30TW
GA35ME
GA35PL
GA55ME
GA55PL
GF85PL
GF85PS
GF85TW
SP100R
GA35TW
GA35PS
GA55PS
GF85TH
SA33TW
GA35SG
GA55SG
GA35TH
GA55TH
SP70R
Feature
HEAD/CH
2/2
2/2
2/2
4/4
4/4
6/6
6/6
6/6
4/4
NTSC (3.58) (REC/PB)
×/a
×/××/aa/aa/aa/aa/aa/aa/a
(4.43) (REC/PB)
×/××/a
×/×
a/a
×/××/×
a/a
×/×
a/a
MESECAM (REC/PB)
×/a
×/a
×/aa/aa/a
×/×
a/a
×/×
a/a
REC (NTSC) (SP/EP)
×/××/××/×
a/aa/aa/aa/
×
a/aa/
×
(PAL)
(SP/LP)
×/××/××/×
a/aa/a
×/×
a/
××/×
a/
×
PLAY (NTSC) (SP/EP)
a/aa/aa/aa/aa/aa/aa/
×
a/aa/
×
(PAL)
(SP/LP)
a/aa/aa/aa/aa/a
×/×
a/
××/×
a/
×
RCA LINE IN/OUT
×/a (2P) ×/a (2P) ×/a (2P) a (2P)/
a (2P)/
a (3P)/
a (3P)/
a (3P)/
a (3P)/
a (2P)
a (2P)
a (3P)
a (3P)
a (3P)
a (3P)
MODULATOR
SYSTEM
13ch
G/K
3/4ch
G/K
3/4ch
3/4ch
G/K
13ch
G/K
REMOTE
COMMANDER
RMT-V286C RMT-V286A RMT-V286A RMT-V286 RMT-V286 RMT-V286 RMT-V286 RMT-V286B RMT-V286
3
TABLE OF CONTENTS
Section
Title
Page
Section
Title
Page
Feature Difference ................................................................... 2
SERVICE NOTE ...................................................................... 4
1.
GENERAL
Getting Started .............................................................. 1-1
Basic Operations ........................................................... 1-2
Additional Operations .................................................... 1-3
Additional Information ................................................... 1-6
2.
DISASSEMBLY
2-1.
Upper Case Removal .................................................... 2-1
2-2.
Front Panel Section Removal ........................................ 2-1
2-3.
Rear Panel Removal ..................................................... 2-1
2-4.
Mechanism Deck Removal ............................................ 2-1
2-5.
MA-366 Board Removal ................................................ 2-2
2-6.
Internal Views ................................................................ 2-3
2-7.
Circuit Boards Location ................................................. 2-4
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.
Mode Control Block Diagram ........................................ 3-9
3-6.
Power Block Diagram .................................................... 3-11
4.
PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS
4-1.
Frame Schematic Diagram ............................................ 4-3
4-2.
Printed Wiring Boards and Schematic Diagrams ......... 4-5
MA-366 Printed Wiring Board ....................................... 4-5
MA-366 (Video, Audio) Schematic Diagram ................. 4-9
MA-366 (OSD, Servo/System/Mode Control)
Schematic Diagram ....................................................... 4-13
MA-366 (HiFi Audio, I/O, TUNER)
Schematic Diagram ....................................................... 4-15
MA-366 (Power Supply) Schematic Diagram ............... 4-17
FR-167 Printed Wiring Board and
Schematic Diagram ....................................................... 4-19
5.
INTERFACE, IC PIN FUNCTION DESCRIPTION
5-1.
System Control-Video Block Interface
(MA-366 BOARD IC101) ............................................... 5-1
5-2.
System Control-Servo Peripheral Circuit Interface
(MA-366 BOARD IC101) ............................................... 5-1
5-3.
System Control-Mechanism Block Interface
(MA-366 BOARD IC101) ............................................... 5-2
5-4.
System Control-Audio Block Interface
(MA-366 BOARD IC101) ............................................... 5-3
5-5.
Servo/System Control Microprocessor
Pin Function (MA-366 BOARD IC101) ......................... 5-4
6.
ADJUSTMENTS
6-1.
Mechanical Adjustments ............................................... 6-1
6-2.
Electrical Adjustments ................................................... 6-1
2-1.
Pre-Adjustment Preparations ........................................ 6-1
2-1-1. Instruments to be Used ............................................ 6-1
2-1-2. Connection ............................................................... 6-1
2-1-3. Set-up of Adjustment ............................................... 6-1
2-1-4. Alignment Tapes ....................................................... 6-1
2-1-5. Specified I/O Level and Impedance ......................... 6-1
2-1-6. Adjusting Sequence ................................................. 6-2
2-2.
Power Supply Adjustments ........................................... 6-2
2-2-1. Power Supply Check ................................................ 6-2
2-3.
Servo System Adjustments ........................................... 6-2
2-3-1. RF Switching Position Adjustment ........................... 6-2
2-4.
Audio System Adjustments ........................................... 6-3
2-4-1. Hi-Fi Audio System Adjustment ............................... 6-3
1.
AF Switching Position Adjustment ........................... 6-3
2-4-2. Normal Audio System Adjustment ........................... 6-3
1.
ACE Head Adjustment ............................................. 6-3
2.
E-E Output Level Check ........................................... 6-3
2-5.
Parts Arrangement Diagram for Adjustments ............... 6-4
7.
REPAIR PARTS LIST
7-1.
Exploded Views ............................................................. 7-1
7-1-1. Front Panel and Cabinet Assemblies ....................... 7-1
7-1-2. Chassis Assembly .................................................... 7-3
7-1-3. Mechanism Chassis Assembly (1) ........................... 7-4
7-1-4. Mechanism Chassis Assembly (2) ........................... 7-5
7-1-5. Mechanism Chassis Assembly (3) ........................... 7-6
7-2.
Electrical Parts List ....................................................... 7-7
4
SERVICE NOTE
1. DISASSEMBLY
· This set can be disassembled in the order shown below.
Note: Pages in
indicated pages in the SERVICE MANUAL.
Pages in
indicated pages in the VHS MECHANICAL ADJUSTMENT MANUAL VI.
Set
Upper case
(Page 2-1)
Front Panel
Section
(Page 2-1)
Pinch Press
Block Ass'y
(Page 14)
Ground Shaft
Ass'y
(Page 13)
Mechanism
Deck
(Page 2-1)
FL Complete
Ass'y
(Page 13)
Drum
Ass'y
(Page 13)
Rear
Panel
(Page 2-1)
Rubber
Belt
(Page 15)
Rubber
Belt
(Page 15)
Slider
(Page 26)
Loading
Gear (T, S)
(Page 28)
Retainer
Plate
(Page 22)
MA-366
Board
(Page 2-2)
Rubber
Belt
(Page 15)
Capstan
Motor
(Page 15)
FL Slider
Block Ass'y
(Page 22)
Rotary
Switch
(Page 2-2)
Tuner
Unit
Pully Gear
Ass'y
(Page 29)
Cam Motor
Retainer
(Page 31)
Cam Gear
(Page 23)
Cam Motor
(Page 31)
Reel Direct
Ass'y
(Page 30)
1-1
SECTION 1
GENERAL
This section is extracted from SLV-SP100
instruction manual. (3-867-581-11)
SLV-CA30/GA35/GA55/GA65/GF85/SA33/SP70/SP100