JVC SR-S365U User manual

fs gain “fe pares US ts
This service manual describes only the matters that are different from the SR-S365U.
On servicing, refer to the service manual (No. 9330) for the SR-S365U together with this.
COPYRIGHT © 1998 VICTOR COMPANY OF JAPAN, LTD.
No. 9356
June 1998

SR-S365U has been changed to SR-S365U(A) since the serial No. xx3x7659 and after. The mechanism
assembly has been changed to an aluminum die-cast and the main board assembly has been changed
as well.
To distinguish the new model from the senventional models, a label printed (A) is attached after the
model No. of the rating label (Serial No. label) and the front panel.
This service manual only explains the changed sections, therefore, to carry out the services for the (A)
version, please refer to the manual for the SR-S365U (No. 9330) as well.
Section Title Page Section Title Page
Important Safety Precautions 2.5.4 EP auto tracking CHECK «00... sees eteteteereeiereeeneereetes 2-21
SECTION 1 SERVICE CAUTION 2.5.5 Tension arm position check/adjustMent ....... eee 2-22
2.5.6 Take-up torque CHECK o...... ce ceeeceecceeceenreeerensatenensensane 2-22
1.1
DIFFERENCE
BETWEEN
SR-S365U
AND
SR-S365U(A)
...........
1-1
2.5.7
Tape
transport
system
check/adjustment
........
eee
2-22
SECTION 2 MECHANISM REPAIR/ADJUSTMENT PROCEDURES
2.1 BEFORE MAKING REPAIR/ADJUSTMENT ......ceeeeeeeeerteetereees 2-1
2.1:4 PRECAUTIONS .....vecceesvinescdesetssovescseestcevesteoreeenees 2-1
2.1.2 How to unload the cassette tape manually 2-1
2.1.3 Special implements and Tools Required for Adjustment ........ 2-1
2.1.4 Specifications of alignment tape 2-1
2.2 MAINTENANCE AND CHECK uo... eeeceeeerees 2-2
2.2.1 Location of main mechanical parts 2-2
2.2.2 Maintenance of main parts and periodical
FOTENON COs, ors. aint ote cucssh ideas vender wacet eee vs ote Seat y ena nee 2-3
2.2.3 Cleaning ..... 2-4
2:2:4 > LUDTICATIONS si..cceeedsiesieegaranten an 2-4
2.3 REPLACEMENT OF MAIN PARTS .......... ahs 2-4
2.3.1 Before reMOVING .... ce ececeeseesseseesereceeseeserieerseeneeerseneeenen® 2-4
2.3.2 How to set to the mechanism assembly
POSITION Ae ca ia eee Ra ancl eit Nahas 2-4
2.3.3 Stator Assembly ... 2-4
2.3.4 Rotor Assembly ............ wi 2-
2.3.5 Upper drum assembly .... wide
2.3.6 Head cleaner oe 2
2.3.7 Pinch roller arm assembly . we
2.3.8 Tension band asSeEMbly ........cccceeceeteeeeeeeeeeeeees wide
2.3.9 Capstan motor, Capstan brake arm assembly ... aide
2:38:41 ON DIuM-ASSOMDNY 2.3... isccis,weceesecsecsceetaa viet raupeceresstesdiaovtesd 2-
2.3.11 Clutch unit (S), (T), Control plate, Reel disk (S), (T)......... 2-
2.3.12 Fullerase head 2... lee eceseeceeeceeeeeteesneerseeeensenseseeee 2-10
2.3.13 A/C head assembly . iach Soede sck ae PaaMee 2-10
2.3.14 Belt (LOadING) ..........ccccccssesecssecseserecstsestessesessrsesnceeseeses 2-10
2.3.15 Belt (Capstan, HOUSING) «0... ce celeeseeseeteeeaseeereeteees 2-11
2.3.16 Idler assembly ........... ee Sesh AMOR, 2-11
2.3.17 Sub brake assembly (7) ..... ae we 211
2.3.18 Sub brake assembly (S) ......... Lrbtedeitbewi slvcdee Sees 2-11
2.3.19 Pole base assembly(S), (T) .... ence Ree nee 2-12
2.3.20 Guide flange(S), (T) ...... sEfleiiess Deen ibid 2-12
2.3.21 Guide arm assembly ..........- siledavasedeeseleexstn suas 2-13
2.3.22 Loading motor, Motor pulley wo... cece eseesereereeneenees 2-13
2.3.23 Rotary encoder, Control Cam ......ceccceeeeeeeeeteestseeteeeens 2-13
2.3.24 Slide plate, Main brake assembly(S), (T) «0... eee 2-14
2182 5 SIICGISK(S): (Dic cbsces esac cbevaeass Ave cevatnda vishe en cuce Pies ceeds 2-15
2.3.26 Guide rail, Loading arm assembly ...........:::eesseceeeeeeeeeee 2-15
2.3.27 Pulley AaSSOMDIY 0... cece eecsecseeceerecseeeecnseeseeentoneee 2-16
2.3.28 Worm gear aSSEMbIy .......ceeeeceececsecenceeeeeeneeeeeeeeeseeeneeene 2-17
2.4 HOW TO MOUNT THE MAIN PARTS
(Mechanism Phase Adjustment) .00.....0..cceeeeeeseereeeeeteerenees 2-17
2.4.1 Before parts assembling .......... beast Dod
2.4.2 Loading arm assembly (S), (T) oc. eee eeeeeeseeeseeeeeeeeneeeee 2-17
2.4.3 Rotary encoder, Change lever, Control cam .. we 2718
24.4. “SWS: Plate... sctecseccze cidene sce cesdedeckeceee cna dnadavevecpsodzscstesers 2-18
2:45. Control plate. sie sec sitivdcadeceee tdi ele ees 2-18
2.5 INTERCHANGEABILITY ADJUSTMENT ........eeeeseesesreererneeers 2-19
2.5.1 FM waveform linearity check/adjustment .......... 2-19
2.5.2 A/C head assembly height, Azimuth
CHECK/ACUSTIMISN Tica ssivsses scecesevesssescesenehbeecseccesvss destuesse 2-20
2.5.3 A/C (Audio Control) head phase (X value) check/
AG/USTMEN Ty ote een ele Meera eeu oie, of 2-21
OYUYdhodoa
SECTION 3 ELECTRICAL ADJUSTMENT
3:1 PRECAUTION. nn. echissectn calidon. Hen Ghee ae diane cai iiice
3.1.1 Required test equipment .......
3.1.2 Required adjustment tools ....
3.1.3 About board adress 0... cece seeeeeeseereeemeeenaees
3.1.4 Signals required for video system adjustment .
3.2 SWITCHING REGULATOR CIRCUIT ....
3.2.1 5V DC output voltage ...........
3.3 SERVO CIRCUIT oo... eee ee
3.3.1. PB switching point .........
3.3.2 Slow tracking preset ......
3.4 VIDEO CIRCUIT wee eee
3.4.1 AGC Y level ou. aviuies
3.4.2 White/dark clip (S-VHS/VHS) .
3.4.3. Sub emphasis input level .........
3.4.4 Carrier/deviation (S-VHS/VHS) ..
3.4.5 PB Y level (S-VHS/VHS).....
3.4.6 SP/EP REC color level .......
3.4.7 S-VHS VIDEO EQ. ...........
3.4.8 AFC CLOCK... bout
3.5 PRE/REC CIRCUIT ......
3.5.1 REC-FM level ... fis
3.6 AUDIO CIRCUIT oo. eee
3.6.1 Audio REC FM level .......
3.6.2 Audio EE level
3.7 Y/C SEP CIRCUIT.........
3.7.1 Digital I/O level
BOOONNNYNN SSS 5>
a a
WW WD WD WW WOO WW WW OO WW WW WW WOO AHOdHAROOGEK
SECTION 4 CHARTS AND DIAGRAM
4.1 OVERALL WRING DIAGRAM .....0...ccceccsceeserseeeteeseeeecsersesenaenes 4-1
4.2 MAIN (SYSCON) CIRCUIT BOARD
SCHEMATIC DIAGRAM... cece cece terseneesereneeenetsesasseneeneeess 42
4.3 MAIN (SERVO) CIRCUIT BOARD
SCHEMATIC DIAGRAM uu... eee cece cecenseeerenssensnecnsreeteeneeess 4-3
4.4 MAIN (VIDEO) CIRCUIT BOARD
SCHEMATIC DIAGRAM... cece ee cccecssetseereenseceeseseessseecseneesees 4-4
4.5 MAIN (AUDIO) CIRCUIT BOARD
SCHEMATIC: DIAGRAM ..... oc ceeecccteeteeeecreseesecsereeceeseeeresaneesenaes
4.6 MAIN CIRCUIT BOARD 0.0... .ccecceccccceteetseeteertereeneenes pisetrcedans
4.7 FG AMP CIRCUIT BOARD SCHEMATIC DIAGRAM...
4.8 FG AMP CIRCUIT BOARD .......c ccc cceeeeteereeneeeeenes
4.9 IC BLOCK DIAGRAMS. ....... cscs eesccccteesetsenseseesessetecneeuseneensessnes
SECTION 5 EXPLODED VIEWS AND PARTS LIST
5.1 CABINET AND CHASSIS ASSEMBLY MMI] o.oo. eceteeenees 5-1
5.2 CABINET AND CHASSIS ASSEMBLY PARTS LIST stereetgese DAZ
5.3 MECHANISM ASSEMBLY (MILA) 0... ce ceccecceeeeseeeeesetseeeee we BS
5.4 MECHANISM ASSEMBLY PARTS LISTT MI4) oe 5-3
SECTION 6 ELECTRICAL PARTS LIST
6.1 MAIN BOARD ASSEMBLY PARTS LIST (0113) oe 6-2
6.2 FG AMP BOARD ASSEMBLY PARTS LIST (1I6) oe 6-7

Important Safety Precautions
Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes
of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the
following precautions when a set is being serviced.
@ Precautions during Servicing
1.
Locations requiring special caution are denoted by labels and
inscriptions on the cabinet, chassis and certain parts of the
product. When performing service, be sure to read and com-
ply with these and other cautionary notices appearing in the
Operation and service manuals.
Parts identified by the A\ symbol and shaded (
critical for safety. .
Replace only with specified part numbers.
Note: Parts in this category also include those specified to com-
ply with X-ray emission standards for products using
cathode ray tubes and those specified for compliance
with various regulations regarding spurious radiation
emission.
‘) parts are
Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as specified.
Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
Use specified insulating materials for hazardous live parts.
Note especially:
1) Insulation Tape
2) PVC tubing
3) Spacers 5) Barrier
4) Insulation sheets for transistors
. When replacing AC primary side components (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of
wires securely about the terminals before soldering.
Spode 67
Fig.1
Observe that wires do not contact heat producing parts
(heatsinks, oxide metal film resistors, fusible resistors, etc.)
Check that replaced wires do not contact sharp edged or
pointed parts.
. When a power cord has been replaced, check that 10-15 kg of.
force in any direction will not loosen it.
Power cord
Fig.2
. Also check areas surrounding repaired locations.
. Products using cathode ray tubes (CRTs)
In regard to such products, the cathode ray tubes themselves,
the high voltage circuits, and related circuits are specified for
compliance with recognized codes pertaining to X-ray emission.
Consequently, when servicing these products, replace the cath-
ode ray tubes and other parts with only the specified parts.
Under no circumstances attempt to modify these circuits.
Unauthorized modification can increase the high voltage value
and cause X-ray emission from the cathode ray tube.
12. Crimp type wire connector
In such cases as when replacing the power transformer in sets
where the connections between the power cord and power
transformer primary lead wires are performed using crimp type
connectors, if replacing the connectors is unavoidable, in or-
der to prevent safety hazards, perform carefully and precisely
according to the following steps.
1) Connector part number : E03830-001
2) Required tool : Connector crimping tool of the proper type
which will not damage insulated parts.
3) Replacement procedure
(1) Remove the old connector by cutting the wires at a point
close to the connector.
Important : Do not reuse a connector (discard it).
w
a fe
Ge
cut close to connector
Fig.3
(2) Strip about 15 mm of the insulation from the ends of
the wires. If the wires are stranded, twist the strands to
avoid frayed conductors.
15mm
pas
gar
Fig.4
(3) Align the lengths of the wires to be connected. Insert
the wires fully into the connector.
Metal sleeve
Connector
Fig.5
(4) As shown in Fig.6, use the crimping tool to crimp the
metal sleeve at the center position. Be sure to crimp fully
to the complete closure of the tool.
~— Crimping tool
Fig.6
(5) Check the four points noted in Fig.7.
Crimped at approx. center
Not easily pulled free _ SEnete sieeve
<~_—-
~
t
mil
Wire insulation recessed
more than 4mm
Fig.7
Conductors extended

@ Safety Check after Servicing
Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been
returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compli-
ance with safety standards.
1. Insulation resistance test .
Confirm the specified insulation resistance or greater between power cord plug prongs and
externally exposed parts of the set (RF terminals, antenna terminals, video and audio input
and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
Dielectric strength test
Confirm specified dielectric strength or greater between power cord plug prongs and exposed
accessible parts of the set (RF terminals, antenna terminals, video and audio input and output
terminals, microphone jacks, earphone jacks, etc.}. See table 1 below.
Clearance distance
When replacing primary circuit components, confirm specified clearance distance (d), (d’) be-
tween soldered terminals, and between terminals and surrounding metallic parts. See table 1
below.
Chassis
Power cord,
primary wire
Fig. 8
Leakage current test
Confirm specified or lower leakage current between 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.).
Measuring Method : (Power ON)
Insert load Z between earth ground/power cord plug prongs and externally exposed accessi- Externally
ble parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and exposed
following table 2. accessible part
Fig. 9
Grounding (Class I modei only)
Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in,
Video out, Audio in, Audio out or Fixing screw etc.).
Measuring Method:
Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.
Grounding Specifications
Grounding Impedance (Z)
USA & Canada ZS 0.10hm
Europe & Australia Z S$ 0.5 0hm
O00
AC inlet Exposed accessible part
Milli ohm meter
Fig. 10
Insulation Resistance (R)
100 V R>1Mays00 vp LAC TRV 1 minute
100 to 240 V
110 to 130 V
d 24mm
110
to
130
V
d'
2
8
mm
(Power
cord)
200 to 240 V
d' 2 6mm (Primary wire)
USA & Canada AC 900 V 1 minute
AC 3 kV 1 minute
(Class I)
AC 1.5 kV 1 minute
(Class I}
Europe & Australia} R210 MQ/500 V DC
Table 1 Specifications for each region
AC Line Voltage
Leakage Current (i) a,b, ¢
A
1mArms Exposed accessible parts
USA & Canada HA
110 to 130 V
0.5 mA rms Exposed accessible parts
i S$ 0.7 mA peak :
i<2mAdc Antenna earth terminals
110 to 130 V
220 to 240 V
Europe & Australia
i S$ 0.7 mA peak :
i <9 mA de . Other terminals
Table 2 Leakage current specifications for each region
Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.

SECTION 1
SERVICE CAUTION
1.1 DIFFERENCE BETWEEN SR-S365U AND SR-S365U(A).
This table shows differences only.
Subsection 7.1 Packing [M|[1]
Packing label No (A) mark With (A) mark
Subsection 5.1 Cabinet and chassis assembly M2]
GSCREW SDST2608Z SDSP2606Z
@4 TERMINAL BOARD PRD19003 PRD19003-01-02
SDSF3008Z
With (A) mark
PGD40197
PGS30402A
Fixxing the drum assembly
Design has been changed
Fixxing the FG AMP board
G8)SCREW
GRATING LABEL
@4LABEL
(9)CASSETTE HOUSING ASSEMBLY PUS29724A-5
GIDSCREW SDST2612Z
GB)SCREW SDSP2606Z
Subsection 5.2 Mechanism assembly M4]
@label of Front panel
No interchangeability
Fixxing the cassette housing
Fixxing the cassette housing at left
Fixxing the cassette housing at right
They have no interchangeability, refer to Section 5 Exploded views and parts list and Section 2 Mechanism adjustment.
Section 6 ELECTRICAL PARTS LIST
MAIN BOARD ASSEMBLY WI SLK1036-00A SLK1112-00A No. interchangeability
FG AMP BOARD ASSEMBLY B18 Pe SLK2072-00A Added

SECTION 2
MECHANISM REPAIR/ADJUSTMENT PROCEDURES
2.1 BEFORE MAKING REPAIR/ADJUSTMENT
2.1.1 Precautions
(1) When using the soldering iron, be sure to disconnect the
power cord of the main unit from the AC outlet beforehand.
(2) Pay attention not to damage the wires when connecting/
disconnecting the connectors.
(3) Do not touch the parts around the adjustment point because
of wrongly specifying the defective point.
(4) Pay. special attention not to injure claws, etc. by accident
during the repair operation.
(5) When mounting the cassette housing assembly, set the unit
exclusively to the mechanism assembly position. (Refer to
chapter 2.3.2.)
(6) When remove any slit washers, replace them new one.
2.1.2 How to unload the cassette tape manually
When the unit malfunctions with the cassette tape being left
loaded and the cassette tape cannot be ejected, remove the
cassette tape in the following manner:
(1) Be sure to disconnected the power cord and remove the
top cover.
(2) For unloading, rotate the loading motor in the main deck
assembly manually toward you. At this time, unload the
tape by rotating the capstan motor counterclockwise and
winding the tape so that the grease does not come into con-
tact with the slackened tape.
(3) When the tape comes to the position where the pole base
assemblies (supply side, take—up side) and guide arm as-
sembly are hidden by the cassette shell, stop rotating the
capstan motor, and check that the tape is fully wound up.
(4) When the capstan motor is further rotated counterclockwise,
the cassette housing is ejected, then the cassette tape may
be removed.
Loading motor
Capstan motor
Guide arm assembly
Poll base assembly
Fig. 2-1-1
2-1
2.1.3 Special implements and Tools Required for Adjustment
Alignment tape
Alignment tape (SP)
MHP MBP-X
)
fF
ean
7
Cassette torque meter
PUJ42881
Alignment tape (EP)
MHP-L (Recording CH-1 only)
<<
/
“SS
:
“SX
‘
|
|
A/C
head
position
bit
Roller
driver
PTU94010
PTU94002
;
Grease
Parallel
check
plate
KYODO-SH-P/MD-2000/KANTO-GB-TS-1 PGJO5035 (0.05 mm)
Oir aa
SS>
COSMO-HV56
Table 2-1-1 Special implements and tools required for adjustment °
\
2.1.4 Specifications of alignment tape
¢MHP ~
Video Signal | Audio Signal Applications
VHS SP 7kHz * Interchangeability adjustment
¢ PB switching point adjustment.
Stairstep
¢ MHP-L (Recording CH-1 only)
Audio Signal Applications
¢ Interchangeability adjustment
7
Video Signal
VHS EP
Stairstep
° MBP-X
Video Signal
VHS SP
Audio Signal Applications
¢ X-value adjustment
Stairstep
(1 field per 5 frame does not contain video and audio)

2.2 MAINTENANCE AND CHECK
2.2.1 Location of main mechanical parts
Inertia plate : Guide roller (T)
Inertia roller Uependruly Guide flange (T)
Cleaner roller
Capstan motor
P Loading motor
Motor pulley
Pinch roller arm assembly
J
;
Guide
roller
(S)
|
DL
=
Guide
arm
assembly
Guide
flange
(S)
Pole base assembly (S) a mA : A Belt (Loading)
To]
Lever assembly
Tension arm assembly f= Noe V/ paieteak
Tension band assembly ; :
Pole base
assembly (T)
Clutch unit (S) Clutch unit (T) .
Reel disk (S) Reel disk (T)
Slit disk (S) Slit disk (T)
Idler arm
assembly
Fig. 2-2-1 Main deck top side
Capstan
motor
Belt
(Capstan)
Capstan brake arm
assembly
Drum assembly
Worm gear
assembly
Rotary encoder
Belt (Housing) Pulley assembly
Fig.2-2-2 Main deck bottom side

2.2.2 Maintenance of main parts and periodical reference
Table 2-2-1 Maintenance & Check Schedule is compiled as stand-
ard of main parts replacement on the assumption that the set is
used in ordinary conditions. Therefore, replacing periods indi-
cated in the table greatly differ depending on actual use and
environmental conditions. If the maintenance check is not per-
formed correctly, the service life shown in the following chart
will be greatly reduced and it could affect the other units. How-
ever, it is recommended that rubber parts are replaced every
~ three years as these could be affected by aging.
Cate- ery mere Symbol No. of Part Standard Service Period (Operation Hours) eecus
gory and it appears in | 500 | 1000
TAPE TRANSPORT PART 2
GUIDE FLANGE (S, T) * *
& [3 | FULL ERASE HEAD * *
> POLE BASE ASSEMBLY (S) * *
5 POLE BASE ASSEMBLY (T) M *
@ | 6 | AC HEAD ASSEMBLY Mi4l-108 * *
& [7 | CAPSTAN SHAFT =
[8 | PINCH ROLLER ARM ASSEMBLY | Ml@l-107 x | ox | e@ |
[9 | GUIDE ARM ASSEMBLY Mi4)-106 x | *« | o |
DRUM ASSEMBLY Mz)-23 iw | «x | e | e | 23.
12| CAPSTAN MOTOR Mal-72 oe Eee ae e | 239
ra] TENSION ano ASSEVELY —[mwges | | 0 |e | o | e [2a —~*d
14] CLUTCH UNIT (S) Mia-104 [fo fe To fot [2a
15 | CLUTCH UNIT (7) MEl-105 r [| o | @ [ o | eA | 2311
16| BELT m@s70,7 | | o | @ | o | @ [2siesi |
17| MAIN BRAKE (S) ASSEMBLY _| Mld)-o1 a a ee
18| MAIN BRAKE (T) ASSEMBLY __| AMIL-93 ae ee ee ee
uae [| o |e | o | « |zam sd
zr] caPSTAN Bae anwassenBLy [mize [| |e || e [2a SSS
_ fezppcenanwasseweLy [wires || e | de oad
& |23| REEL DISK (S) MI4}-95, 96, 97,
@ 2.3.11
2 en ee
S fas] surosks Lamas [re [aaa
SLIT DISK (7) | MI4)-36 2.3.25
WORM GEAR ASSEMBLY M)-122 + —} $1} $— 2.3.28
eS ae ie
32] LOADING ARM ASSEMBLY (S) |e | @ | 23.26
33| LOADING ARM ASSEMBLY (T) st @ | 23.26
34| LOADING MOTOR fo | [| e | 2322
35 | MOTOR PULLEY Mu ae ee es a ee ee
; [26] CLEANER ROLLER AssemBLy [m@7 | o | @ | @ | @ | 236
© |37| ROTARY ENCODER Ma@-84 ewes Bs eee @ | 23.23
38 | CASSETTE HOUSING ASSEMBLY | MIZI-19 LE J 1.1/8 000 replacement
*: Cleaning ©: Check and replacement if required
Table 2-2-1 Maintenance & Check Schedule
@Replacement
A\ : Lubrication to the shaft

2.2.3 Cleaning
Periodical cleaning of the tape transport system is desirable.
Therefore, perform cleaning when a set is brought in for repairs
or maintenance. Contamination of the video heads, tape guides
and brush.can reduce playback picture quality and in extreme
cases, even damage the tape.
(1) To clean the video heads, press a quality moistened paper
gently against the upper drum with fingertip and turn the
drum counter clockwise by hand. :
Note: Do not stroke it vertically, as this may damage
the heads.
(2) For cleaning of the tape transport mechanism parts other
than the upper drum, use a close weave cloth or cotton swab
dipped in alcohol.
(3) After cleaning, be sure to check that the cleaned points are
completely dry before loading the video tape.
2.2.4 Lubrication
It is not necessary to periodically lubricate oil or grease, apply
lubrication to the new parts only when replacing them. If there
is oil or grease at points which come into contact with the re-
placed parts, wipe it off and lubricate again.
(1) For the points where oil or grease is to be applied, refer to
the mechanism assembly exploded view diagram [M4]. For
oil/grease to be used, refer to Table 2-2-1.
Classification
Name
Part
No.
Symbol
i
2
Exploded
View
KYODOSH
[0p
Floil GB-TS-1 | |KANTO-GB-TS-1
| _ Oil ___ | Cosmo Hydro HV56 | COSMO-HV56
Table 2-2-1 Greases and Oil used in the Unit
(2) Grease is not required for a replacement cassette housing
assembly, as this has been applied at the factory.
2.3 REPLACEMENT OF MAIN PARTS
Whenever coming across an instruction to refer to Chapter
1.1 on "REMOVAL OF MAIN PARTS” in the section of RE-
PLACEMENT OF MAIN PARTS , refer to SR-S365U Service
Manual (No. 9330).
2.3.1 Before removing
This locates the mechanism assembiy positions where parts
removal and reassembling are performed.
2.3.2 How to set to the mechanism assembly position
Remove the cassette housing assembly (refer to Chapter 1.1
“REMOVAL OF MAIN PARTS”), and rotate the mode motor so
that the control cam positioning hole comes to the chassis hole
on the main deck assembly. In this status, the unit is set at the
mechanism assembly position.
ositioning mark
Control.cam
Fig. 2-3-1
2.3.3 Stator Assembly
(1) Remove the flat cable.
(2) Take out 2 screws (S10).
(3) Raise the stator assembly in the direction indicated by the
arrow to remove it (also remove the inertia roller).
(4) To reinstall, first secure inertia roller and the flat cable, then
insert 2 screws (S10).
(S10)
@ 8
\ 4 PAONUSE
Flat Cable
Fig. 2-3-2
2-4

(5) After reinstalling, be sure to perform PB switching point ad-
justment (See SECTION 3 ELECTRICAL ADJUSTMENT).
NOTE: When refitting the connector, check that the flat wire
is inserted correctly.
2.3.4 Rotor Assembly
@ How to remove
(1) Remove the stator assembly.
(2) Take out 2 screws (S11) and remove the rotor assembly.
Fig. 2-3-3
@) How to reassemble
(1) .Align the upper drum assembly and rotor assembly phase
as indicated in Fig. 2-3-4.
(2) Overlap holes (a) of the upper drum assembly with holes (b)
of the rotor assembly and secure with 2 screws (S11) as
indicated in Fig. 2-3-3.
Hole not in straight
line toward the right
2-5
2.3.5 Upper drum assembly
1. Removal
(1) Remove the stator assembly (see 2.3.3) and rotor assem-
bly. (See 2.3.4)
(2) Use a 1.5 mm hexagonal driver to loosen the collar assem-
bly screw and remove the collar assembly.
(3) Remove the upper drum assembly and use tweezers to re-
move the washer.
Collar Assembly
Upper Drum Assembly Hex diver
(1.5mm)
Fig. 2-3-5 (1)
NOTE: If the Brush is replaced, do not apply the grease to
the contacts. ae
2. Installation
(1) Use an air brush to clean the lower drum assembly and the
coil section of the new upper drum assembly.
(2) Set a new washer on the drum shaft-as indicated in Fig. 2-3-
5(1).
NOTE: Be sure to use the new washer when replace the
upper drum assembly.
Lower Drum
Assembly
Upper Drum
Assembly
Fig. 2-3-5 (2)

(3) Note the top and bottom of the collar assembly and deter-
mine the position as indicated in Fig. 2-3-5(3).
Upper Drum Assembly
Assembly
Fig. 2-3-5 (3)
(4) While pressing the collar assembly evenly from above with
your fingertips, secure the hexagonal screw.
Y
Tighten
Collar Assembly.
Fig. 2-3-5 (4)
(5) After installing, gently turn the upper drum by hand and con-
firm normal rotation.
(6) Install the rotor assembly (see 2.3.4) and stator assembly.
(See 2.3.3)
(7) Clean the upper and lower drum assembly and perform the
following adjustment;
e FM waveform linearity check/adjustment (see 2.5.1)
e A/C head phase (X value). check/adjustment (see 2.5.3)
e PB switching point (see 3.3.1) :
® Slow tracking preset (see 3.3.2)
e SP/EP REC color level (see 3.4.6)
¢ S-VHS VIDEO EQ (see 3.4.7}
e Audio REC FM level (see 3.6.1)
2.3.6 Head cleaner
(1) While releasing the claws (L5) by the driver, remove the head 7
cleaner assembly. !
(2) Replace the new cleaner.
(3) Install the head cleaner assembly for () to face the drum
side.
Be sure to check to clean correctly during loading/unloading
mode.
Head Cleaner assembly
Fig. 2-3-6
2.3.7 Pinch roller arm assembly
@) How to remove
(1) Remove the slit washer.
(2) While pushing aside the pinch plate in the direction of the
arrow, remove the pinch roller arm assembly.
ae Slit washer: MI[3]-45
by|_— Pinch roller arm
assembly
; \_- Pinch plate
ie
@ How to reassemble
(1) Reassemble in the reverse order of removing.
2-6

2.3.8 Tension band assembly
@) How to remove
(1) Remove the cassette housing assembly. (refer to chapter
1.1 “REMOVAL OF MAIN PARTS”)
(2) Remove the screw (3).
(3) Slide part of @ to = left and then while releasing the claws,
remove the tension band assembly. ,
Tension band assembly
Fig. 2-3-8
@) How to reassemble
(1) Reassemble in the reverse order of removing.
(2) After reassembling, check the following adjustment:
© Tension arm position check/adjustment (refer to Chapter
2.5.5)
2.3.9 Capstan motor, Capstan brake arm assembly
@ How to remove
(1) Remove the mechanism assembly. (Refer to Chapter 1. 1
“REMOVAL OF MAIN.PARTS”.)
(2) Remove the slit washer and remove the capstan brake arm
assembly.
(3) Remove the belt.
(4) Remove the three screws @) and remove the capstan mo-
tor from the back of the mechanism assembly.
Capstan motor
Slit washer
:IMI41-75
&
fo) rma]
Capstan brake arm
Belt (Capstan)
assembly
Fig. 2-3-9 (1)
2-7
Fig. 2-3-9 (2)
@ How to reassemble
(1) Reassemble in the reverse order of removing.
2.3.10 Drum assembly
Note: A drum base is installed with the drum assembly in
order to facilitate service maintenance. However, it
is no longer necessary for the SR-S365U(A), so please
remove it.
To remove the drum base, remove the three screws
©. [Refer to the Fig. 2-3-10 (1).]
Drum base
Drum Assembly
Bottom view
Fig. 2-3-10 (1)

@) How to remove
(1) Remove the mechanism assembly. (Refer to Chapter 1. 1
“REMOVAL OF MAIN PARTS”.)
(2) Be carful the drum assembly drop down, remove the three
screws (7) and remove the drum assembly.
Drum assembly
Fig. 2-3-10 (2)
@) How to reassemble
(1) Reassemble in the reverse order of removing.
(2) After replacing the parts, clean the upper drum assembly
and the lower drum assembly, then check the following ad-
justments:
¢ FM waveform linearity check/adjustment (see 2.5.1)
e A/C head phase (X value) check/adjustment (see 2.5.3)
¢ PB switching point (see 3.3.1)
# Slow tracking preset (see 3.3.2)
@ SP/EP REC color level (see 3.4.6)
e S-VHS VIDEO EQ (see 3.4.7)
e Audio REC FM level (see 3.6.1)
2.3.11 Clutch unit (S), (T), Control plate, Reel disk (S), (T)
@) How to remove
(1) Remove the two slit washers and then remove the reel
bracket.
Slit washer: MI[4]-63
Fig. 2-3-11 (1)
(2) Release the claw and then release the tension band assem-
bly from the reel disk (S). (Refer to Fig. 2-3-5.) _
(3) Remove the reel disks (S), (T). The reel disks for SP side and
TU side are different. Make sure to install the correct ones.
(4) Remove the screw @) and remove the control bracket 2.
Reel disk (T)
USB
Control bracket 2
Fig. 2-3-11 (2)
Clutch unit (S)
Reel disk (S)
Fig. 2-3-11 (3)
2-8

(5) Remove the screw @) and screw @0.
(6) Remove the earth plate and the control bracket.
‘black
Earth plate
Control bracket
Fig. 2-3-11 (4)
(7) Remove the slit washer.
(8) Release the hooks at the two points and remove the control
plate.
(9) Remove the clutch units (S), (T).
* Control plate
Slit washer -53
Black
Clutch unit (1)
* When reassembling: Refer to 2.4.5
Fig. 2-3-11 (5)
2-9
@) How to reassemble the reel disk (S), (T)
(1) Reel disk (S)
Reel cap
Spacer
Fits in the
PA spacer
Pee esl
peter
Reel disk (S)
Fig. 2-3-11 (6)
(2) Reel disk (T)
Reel cap
Reel disk (T)
Fig. 2-3-11 (7)
@) How to reassemble
(1) Reassemble in the reverse order of removing.
(2) When mounting the control plate, set the phase of the con-
trol plate appropriately by referring the “How to mount the
main parts”.
(Refer to Chapter 2.4.5.)

2.3.12 Full-erase head
(1) Remove the wire.
(2) Remove the screw 4? and remove the full-erase head for
replacement. oe
Wire
-\
Full erase
head
Fig. 2-3-12
2.3.13 A/C head assembly
@) How to remove
(1) Remove the wire.
(2) Remove the three screws 43) and remove the A/C head as-
sembly.
assembly
A/C head board
aL Spring
Head base
Fig. 2-3-13 (2)
@ How to reassemble
(1) To make the adjustment after reassembling easier, set the
mounting height temporarily, then reassemble in the reverse
order of removing.
A/C head assembly
Head base
Maas
Fig. 2-3-13 (3)
(2) After reassembling, clean the A/C head and perform the fol-
lowing adjustment:
e Interchangeability adjustment (refer to Chapter 2.5)
2.3.14 Belt (Loading)
(1) Remove the belt (loading) from the worm gear and motor
pulley.
Blue
Label
(o— Motor pulley
Loading motor
Worm gear assembly Belt (Loading)
Fig. 2-3-14
2-10

2.3.15 Belt (Capstan, Housing)
@ How to remove
(1) Remove the mechanism assembly. (Refer to Chapter 1. 1
“REMOVAL OF MAIN PARTS”.)
(2) Remove the belts from the pulleys at each point, and re-
place them with new ones.
Belt
(Capstan)
Lath
|
|
(
fl
Sy
SN
~
x6
N\
NE
© SG ow;
AN
nO) ES
poor Oo
ae Ceuta!
©
:
oo = i)
J
ey SS
Cg Zatolo B_ez°
Belt (Housing) Pulley assembly
Fig. 2-3-15
2.3.16 Idler assembly
@) How to remove
(1) Remove the two slit washers and remove the reel bracket.
(Refer to Fig. 2-3-11(1).)
(2) Remove the control plate. (Refer to Chapter 2.3.11.)
(83) Release the idler lever while push the idler assembly, take
out the idler assembly.
Idler lever
Idler assembly
Fig. 2-3-16
@) How to reassemble
(1) Reassemble in the reverse order of removing.
2-11
2.3.17 Sub brake assembly (T)
@ How to remove
(1) Remove the two slit washers and then remove the reel
bracket. (Refer to Fig. 2-3-117 (1).)
(2) Take out the reel disk (T). (Refer to Fig. 2-3-11 (2).)
(3) Remove the spring in the sub-brake assembly, and remove
the sub brake assembly by releasing the hook.
Hook Spring
Fig. 2-3-17
@) How to reassemble
(1) Reassemble in the reverse order of removing.
2.3.18 Sub brake assembly (S)
@ How to remove
(1) Remove the two slit washers and remove the reel bracket.
(Refer to Fig. 2-3-11 (1).}
(2) Release the catch and release the tension band assembly
from the reel disk (S). (Refer to Fig. 2-3-8.)
(3) Take out the reel disk (S).
(4) Remove the spring in the sub brake assembly (S), and take
out the sub brake assembly.
Spring
Sub brake assembly (S)
Fig. 2-3-18
@) How to reassemble
(1) Reassemble in the reverse order of removing.

2.3.19 Pole base assembly (S), (T)
@ How to remove
(1) Remove the head cleaner arm assembly. (Refer to chapter
2.3.6)
(2) Remove the two screws 494.
(3) Rotate the loading motor toward you, and shift the pole base
assembly to near the loading end position. (Refer to Fig. 2-3-
19.)
(4) While releasing the hook of the pole base assembly from
the guide rail and the pin of it from the loading arm , take out
the pole base assembly.
Note: - If the control plate is removed, shift the pole base
assembly by hand.
* A spacer is inserted between the pole base of the
supply side assembly and loading arm assembly.
Care must always be exercised with this spacer.
Pole base assembly (S)
Pole base assembly (T)
Guide
rail
Pole
base
Hook, [po assembly
(supply)
Pin ——
Spacer ——@
————————— — Loading arm
Fig. 2-3-19
@) How to reassemble
(1) Reassemble in the reverse order of removing.
(Be carefull not to touch the drum assembly)
(2) After reassembling, clean the pole base assemblies (S), (T)
and perform the following adjustments:
e Tape transport check/adjustment (Refer to chapter 2.5.6)
e Interchangeability adjustment (Refer to chapter 2.5)
2.3.20 Guide flange (S), (T)
@ How to remove
(1) Remove the two screws (9).
(2) Take out the guide roller (S), (T) and guide flanges (S), (T).
Guide roller (S)
Guide flange (S)
Guide roller (T)
Guide flange (T)
Fig. 2-3-20 (1)
@) How to reassemble
(1) Reassemble in the reverse order of removing.
(2) To make the tape transport adjustment easier after replace-
ment, tighten the screw once until it reaches the end, then
rotate it by the following value in the releasing direction to
set the temporary height.
e Guide flange (S)....... 2.5 turns
© Guide flange (7)....... 1.5 turns
Guide rolier (S) Guide roller (T)
Screw @ an
Cutting surface
of main deck
(bottom reference
surface) =>
Fig. 2-3-20 (2)
(3) After setting the temporary height, check the following ad-
justments:
¢ |nterchangeability adjustment (refer to Chapter 2.5)
ee ee

2.3.21 Guide arm assembly
@) How to remove
(1) While releasing the hook remove the lid guide.
(2) Remove the spring. xy
(8) Remove the Guide arm assembly.
Lid guide
Guide arm Hook Spring
assembly
Fig. 2-3-21
@) How to reassemble
(1) Reassemble in the reverse order of removing.
(2) After replacing the parts, clean the guide arm assembly and
check the following adjustments:
e Interchangeability adjustment (Refer to Chapter 2.5)
2.3.22 Loading motor, Motor pulley
@) How to remove
(1)
Remove
the
belt
from
the
motor
pulley.
i
(2) Remove the connector CN603 from the MAIN board and
remove the wire from the loading motor.
(3) Remove the two screws 46 and remove the loading motor.
(4) De-solder the wire and remove it from the loading motor.
Blue
Label
ise
Loading motor
Belt (Loading)
6.5+0.2mm
Fig. 2-3-22
@) How to reassemble
(1) Mount the loading motor and motor pulley as shown in Fig.
2-3-22.
(2) Reassemble in the reverse order of removing.
2.3.23 Rotary encoder, Control cam
@ How to remove :
(1) Remove the reek disk (T) and the control plate. (Refer to
Chapter 2.3.11.)
(2) Remove the slit washer and remove the lever assembly.
Slit washer: [MI[4]-61
Lever assembly
Se
: DSS C
i@
Fig. 2-3-23 (1)

(3) While releasing the claw of pinch plate, slide it backwards.
(4) While releasing the claw and rotating the guide arm assem-
bly by clockwise, remove the control cam.
*1 When reassembling:
Refer to 2.4.3
*2 When reassembling:
Refer to 2.4.4
*2 Slide plate Claw
Fig. 2-3-23 (2)
(4) Remove the slide plate. (Refer to Chapter 2.3.24.)
(5) Take out the change lever assembly.
(6) While releasing the craws at both sides, take out the rotary
encoder.
* Rotary encoder
Positioning
‘mark
ne OY O-*
|) fey eg eo eo
i ommenmcs i
* When reassembling: Refer to 2.4.3
Fig.2-3-23 (3)
@) How to reassemble
(1) Reassemble in the reverse order of removing.
(2) When mounting the rotary encoder, control cam or control.
plate, set the phases of each part appropriately by referring
to the “How to mount the main parts”. (Refer to Chapter
2.4.3 and Chapter 2.4.5.)
2.3.24 Slide plate, Main brake assembly (S), (T)
@ How to remove i
(1) Remove the mechanism assembly. (Refer to Chapter 1. 1
“REMOVAL OF MAIN PARTS”.) |
(2) Remove the sub brake assembly (T). (Refer to Chapter
2.3.17.)
(3) Remove the sub brake assembly (S). (Refer to Chapter
2.3.18.)
(4) Release the seven craws from the back of the mechanism
assembly, and take out the slide plate from the front surface
of the mechanism assembly.
(5) Remove the slit disk (S). (Refer to Chapter 2.3.25.)
(6) Take out the main brake assembly (7).
(7) While rotating the main brake assembly, take it out.
The back t
Craw
Craw
\
gs
Slide plate r
Fig. 2-3-24 (2)
Main brake assembly (S)
Fig. 2-3-24 (3)
@ How to reassemble
(1) Reassemble in the reverse order of removing.
(2) When mounting the slide plate, set the phases of each part
appropriately by referring the “How to mount the main
parts”. (Refer to Chapter 2.4.4.)

2.3.25 Slit disk (S), (T)
@) How to remove
(1) Remove the reel disks (S), (T), control plate.and clutch units
(S), (T). (Refer to Chapter 2.3.11.)
(2) While releasing the take up head and tension arm lever (See
Fig. 2-3-26 (2)), take out the slit disks (S), (T).
Slit disk (S)
Fig. 2-3-25 (1)
Slit disk (T)
Fig. 2-3-25 (2)
@) How to reassemble
(1) Reassemble in the reverse order of removing.
2-15
2.3.26 Guide rail, Loading arm assembly
@) How to remove ‘ade
(1) Remove the head cleaner assembly and inertia roller. (Re-
fer to Chapter 2.3.3, 2.3.6.)
(2) Remove the reel disk (S), control plate and clutch unit (S).
(Refer to Chapter 2.3.11.)
(3) Remove the slit washer and remove the tension arm .
(4) Take out the take-up lever, tension arm lever and take-up
head.
(5) Remove the pole base assembly. (Refer to 2.3.19.)
Take up lever
Tension arm
assembly
Slit am
:MI4]-32 a
Tension band
assembly
is
Reel disk (S)
Fig. 2-3-26 (1)
Tension arm lever
Insert the pin of take up lever
Fig. 2-3-26 (2)