Aiwa D33 Service User manual

Aiwa
Brand
Aiwa
Model
D33 Service
Category
Cassette players
Type
User manual
m
alluLIra
SERVICE
D33 English
SERVICEMANUAL
VIDEO MECHANISM
TYPEI
P2 LRN 106A
P4 LRN 133A
alluura
S/M Code No. 09-99B-336-8N2
TABLE OF CONTENTS
REMOVING CASSE'FrE MANUALLY ............................. 3
DECK MECHANISM PARTS LOCATIONS
Top View............................................................................ 4
Bottom View ...................................................................... 4
DECK MECHANISM DISASSEMBLY
1. DrumAssembly ........................................................... 5
2. PlateAssemblyTop ..................................................... 7
3. Holder Assembly CST ................................................. 7
4. Guide CST .................................................................. 7
5. BracketSide (L)/Bracket Assembly Door.................... 7
6. ArmAssembly F/I_....................................................... 7
7. LeverAssembly S/W ................................................... 7
8. ArmAssembly Cleaner ................................................ 8
9. Head F/E ..................................................................... 8
10. BaseAssembly A/C Head ........................................... 8
11. BrakeAssembly S ....................................................... 9
12. BrakeAssembly T ....................................................... 9
13, ArmAssembly Tension................................................ 9
14. Reel S & Reel T .......................................................... 9
15. SupportCST ............................................................. 10
16. Base AssemblyP4 .................................................... 10
17. Opener Lid ................................................................ 10
18. ArmAssembly Tlup ................................................... 10
19. ArmAssembly Pinch ................................................. 10
20. BeltCapstan/Motor Capstan ..................................... 11
21.ClutchAssembly D33 ................................................. 11
22. Lever FIR .................................................................. 11
23. Gear AssemblyH-Up/D or Gear Assembly Up/D ...... 11
24. BracketAssemblyJog ............................................... 12
25. GuideRack F/L, Gear Rack F/L ................................ 12
26. BrakeAssembly Capstan .......................................... 12
27. Gear Drive/Gear Cam/Gear Connector .................... 13
28. Bracket Assembly L/D motor ..................................... 13
29. Gear Sector ............................................................... 14
30. Base Tension/Plate Slider/Lever Tension .................. 14
31. Gear Assembly P3/Gear Assembly P2 ..................... 15
32. Base Assembly P3/Base Assembly P2 ..................... 15
33. Arm Assembly Idler Jog or Arm assembly Idler ......... 15
DECK MECHANISM ADJUSTMENT
Tools and Fixtures forservice ......................................... 16
1. MechanismAlignmentPositionCheck ........................ 17
2. PreparationforAdjustment ......................................... 18
3. Checking Torque ......................................................... 18
4. Guide RollerHeightAdjustment.................................. 19
4-1. PreliminaryAdjustment.......................................... 19
4-2. PreciseAdjustment................................................ 19
5. Audio/Control(A/C) Head Adjustment......................... 20
5-1. Preliminary Adjustment .......................................... 20
5-2. Confirm that the Tape Path smoothlybetween
the Take-up Guide and Pinch Roller ..................... 21
5-3. Precise Adjustment (Azimuth Adjustment) ............. 21
6. X-Value Adjustment ..................................................... 21
7. Adjustment after Replacing Drum Assembly
(Video Heads) ............................................................. 22
8. Check the Tape Travel after Reassembling
Deck Mechanism ......................................................... 22
8-1. Checking Audio and RF Locking "13me
during Playback and after CUE or REV ................ 22
8-2. Check for Tape Curling or Jamming ....................... 22
MAINTENANCE/INSPECTION PROCEDURE
I. Check before starting Repairs .................................... 23
2. Required Maintenance ................................................ 24
3. Scheduled Maintenance ............................................. 24
4. Supplies RequiredforInspectionand Maintenance ,.. 24
5. Maintenance Procedure.............................................. 24
5-1. Cleaning ................................................................. 24
5-2, Greasing ................................................................ 25
MECHANISM TROUBLESHOOTING GUIDE
1. Deck Mechanism ........................................................ 26
2. Front Loading Mechanism .......................................... 29
MECHANISM EXPLODED VIEW 1/3 ............................. 32
MECHANISM MAIN PARTS LIST 1/3 ............................ 33
MECHANISM EXPLODED VIEW 2/3 ............................. 34
MECHANISM MAIN PARTS LIST 2/3 ............................ 35
MECHANISM EXPLODED VIEW 3/3 ............................. 36
MECHANISM MAIN PARTS LIST 3/3 ............................ 37
2
REMOVING CASSETTE MANUALLY
1. Remove the loading motor.
3.Turn the capstan belt to take up slacktape.
Capstan belt
, etC.
Fig. 1
Fig. 3
2. Turn the gear connect in the direction ofthe arrow
with youfinger to perform unsledding.
Gear connect
4. Turn the gear connect inthe direction ofthe arrow
withyou finger to performunloading.
Fig. 2
DECK MECHANISM PARTS LOCATIONS
• Top View
_ n_
_4arblla_-
No.
2
_3A
Z3,4
Z3.43_
Z3,4,5
2,3
_1_
Z_1Z14
_13
19
19
Jgre
Part
1 _Drum/,.ssar_
2 FUe_y T_
3 Hdder_mbly CST
4 Gu_eCST
5 _'_et Side(L)
6 Brad_t_e_tlyDo_
7 Atrni_W3y F/L
8 Le_Asser_SW
9 I _n_t_allUy (_eaner
10 HeadF/E
11 Base/L_rn_A_CHead
12 BrakeAssemblyS
13 BrakeAssemt_T
14 Atrn,t_semb!yTens_n
_15RedS
6 RedT
17 Sq0p_tCST
18 Base,kssar_P4
19lOmr_rUd
m (A_nAs_ Tk_o
21IA_m_b_ P_oh
FixingType
3Sae_s,CapFPC
TwoHo_s
Chas_Ho_
2Hod_
l$oew
1Soew
Cha_sHde
Cha.._sHde
Chas_F.mlx_
1Screw
Cl'm_ I-_e
ChassisI-_le
Cl'assisHde
Chasm,91_
Chas_sSh,_t
Chas__
ChasasErr,bossin
Chas_Errbossin
Chassis_
ChasssSh_
• Bottom View
Motor CaP,fan
Gear c_nM¢tor _--
Gut Cam _m
er*ke _._a4y_--
Ca_qztan
Belt Ca_o4tmm
Gear Or_
Guide Rack FA, _--
Lever F/R
NOTE:When if}assembly perform the
procedure in the reverse order.
1) When reassembling, confirm Mechanism and Mode
SwitchAlignment Position(Pefer to Page 17)
2) When disassembling,the Parts for Starting No. Should
be removed first.
Pracedure
Part FixingType
CU:ht_ar_D33
Le_rF_R
a-ad_sar_y_
CtJdeRad__
G_Pad__
Ge_Dr_
GearCam
Ge_Cmns_
_k_rn_LO M_z
Ge_Sa_0r
BaseTerem
Pa_lder
Le_rTmem
Ba_A_ml:_,P2
3,Soe_
l_sha"
IHoek
2Washas
1Screw
ISm_
Ctmds91_
lV_sher
Chas_S_t
Chas_91_
3H_ks
3Washas
1Sony
O:'m_Sla_
ChassisI-k:le
2Hm_
2Hocks
O'e,smHde
O:_mHde
tHo_
Rg-
ure
A-t
_-21
6-21
6-2I
A-2
A-2
A-21
A-3
A..3
A..3
A-4
A.4
A-4
A-4
A4
A-5
A..5
A-5
A-'3
&-5
Rg-
ure
A_
A_
A-6
A..6
A..6
A-7
A-7
A-7
N7
A-8
h8
A_
A,,8
A,.9
N9
N9
A-9
A-10
N10
A-10
A-t0
A-10
DECK MECHANISM DISASSEMBLY
/
b _\, b(Sl)
lit OptiorullParis (Sl)
Holder FPC or Holdl_ FPC or Holder FPC .___< _
(only Ic_ 2HD Models) (only for 4HD_A<_O Models) (only fo_4HD4-1i_i Models)
Fig. A-1
1. Drum Assembly (Fig, A-1-1)
1) Unhook the (H1) on the back side of the Chassis and
separate the Cap FPC,
2) Remove three Screws ($1) and lift up the Drum
Assembly.
3) Remove two Screws ($2) and Separate the Starer of
Drum Motor.
4) Remove two Screws ($3) and Separate the Rotor of
Drum Motor from the Drum Sub Assembly.
NOTE
(1) When reassembling Cap FPC, two Holes of Drum FPC
are inserted to the two Bosses of Holder FPC correctly.
(Refer to Fig. B-l)
(Fig. B-l)
Holder FPC
Cap FPC
Dru_
IFigure in the oppos_e direction I
5
DECK MECHANISM DISASSEMBLY
H1
Plate Assembly Top
(B)
H2
(Fig, A-2-1)
Lever Stopper (L)
/
Holder Assembly CST
Lever Stopper (R)
(Fig. A-2-2)
Arm Assembly F/L
Bracket Side (L)
(Fig. A-2-4)
/
/
H3
($1) /
(Fig. A-2-6)
LeverAssemblyS/W
(Fig. A-2-7)
Groove
Gear Rack F/LGroove
Guide CST
Fig. A-2
(S2)
(Fig. A-2-5)
Bracket
Assembly Door
6
DECK MECHANISM DISASSEMBLY
2. Plate Assembly Top (Fig. A-2-1)
1) Unhook the (H1) and separate the Left S=de
2) Unhook the (H2) and hftupthe Plate Assembly Top
NOTE
(1) When reassembhng, confirm (A),(B) Part of the Plate
Assembly Top is inserted to the (L),(R) Grooves of the
Bracket Side(L) and Bracket Assembly Door
3. Holder Assembly CST (Fig.A-2-2)
1) Push the Lever Stopper(L),(R) in the direction of the
arrows (A), (B), and move the Holder Assembly CST
Plate Assembly Top
Bracket Side (L)
2) Push the Bracket Assembly Door to the right and liftup
the Holder Assembly CST along the Guide Groove of the
Bracket Assembly Door
2) Remove the Screw ($2) and d=sassemblethe Bracket
Assembly Door in the front
6. Arm Assembly F/L (Fig. A-2-6)
1) Push the Arm Assembly F/L to the left and hftup it
NOTE
(1) When reassembhng, confirmthat the Gear(A) of the Arm
F/L and the Gear(B) of the Gear Rack F/L are assembled
as below
7. Lever Assembly S/W (Fig. A-2-7)
Gear(A)
Gear(B)
1) Hook the Spring Lever S/W on (HS)
2) Lift up the left side ofthe Lever S/W from the Groove(A)
of the Chassis
Lever Stopper (R)
Holder Assembly CST
4. Guide CST (Fig.A-2-3)
1) Push two Hooks(H3),(H4) in the d=rectaonof the arrow
and separate the left s=de
2) Unhook (H5),(H6) as above No 1) and disassemble the
Gu=deCST m the directionof the arrow
Bracket Stde (L) Bracket Assembly Door
5. Bracket Side(L) (Fig. A-2-4)/
Bracket Assembly Door (Fig.A-2-5)
1) Remove the Screw ($1) and disassemble the Bracket
Side(L) in the front
Spring
(I-15)
(HS)
NOTE
(1) Place the Spring Lever SNVof the above (No 1) as
onglnal position
(_ Sprin_
Lever (HSA55)_
DECK MECHANISM DISASSEMBLY
Arm Assembly
Cleaner
\\(Fig. A-3-1)
(s,) \
(H1) _ (Fig. A-3-2) _\'_i :\_
Head F/EJ '\\ \, \\
\
Base AssemblyA/C Head
(Fig, A-3-3)
Fig. A-3
8. Arm Assembly Cleaner(Fig. A-3-1)
1) Break away the (A) part shown above Fig, A-3-1 from the
Embossing of the Chassis in the clockwise direction and
lift up the Arm Assembly Cleaner.
9. Head F/E (Fig. A-3-2)
1) Unhook the two Hooks (H1) on the back side of the
Chassis and lift up the Head F/E.
10. Base Assembly AJC Head (Fig. A-3-3)
1) Remove the Screw ($1) and lift up the Base Assembly
A/C Head.
DECK MECHANISM DISASSEMBLY
Spring S Brake
_.-_ . BrakeAssemblyS
_"_"(A) (Fig. A-4-1)
Arm Assembly \,
Tension \
Sprlnl ='C; =, _ __'_ _=_ Reel T
(Fig. A-4 3) _ ',\ ///---- AWnn_ib/Y \\ Spring T Brake
i Reel S \
\
\ "
\ ,_ (Fig. A-4-4),
\
Fig. A-4
11. Brake Assembly S (Fig. A-4-1)
1) Remove the Spnng S Brake
2) Holdthe (A) part shown above Ftg A-4-1 and turn to the
ciockwtsed_recbon,and then hflupthe BrakeAssemblyS
NOTE
(1) When reassembhng, be careful not tochange the Spnng
with below No 12.(Refer to Fig B-2)
12. Brake Assembly T (Fig. A-4-2)
1) Remove the Spnng T Brake
2) Holdthe (B) part shown above Ftg A-4-2 and tum to the
counterclockwtsedirecbon, and then hft up the Brake
AssemblyT
NOTE
(1) When reassembhng, be careful not to change the Spnng
wdh above No 11 (Refer to Fig B-2)
(Difference for Springs) (Fig. B-2)
I ._ Spring T Brake Color(Back_
-":_-_ Sprin_l S Brake |
Spring Tension |
13, Arm Assembly Tension (Fig, A-4-3)
1) Removethe SpnngTenson
2) Holdthe (C) partshownaboveRg A-4-3andtumto_edock-
wee ci_, andthenIdtuptheArmAssmrbtyTenaon
NOTE
(1) When reassembhng, be careful not to change the Spnng
wrthabove No.11,12.(Refer to Fig B-2).
14. Reel S (Fig. A-4-4) & Reel T (Fig. A-4-5)
1) Ltffup the Reef S and Reel T
NOTE
(1) When reassembhng, be careful not to change the Reel S
and Reel T each other
_ Three Holes
Reel S Reel T
(2) Confirm two Shde Washers under the Reel S and Reel T
DECK MECHANISM DISASSEMBLY
SupportCST
(Fig. A-5-1
(D)
•- - \ ,,,, OpenerUd
-\/ (Fig. A-5-3)
"_ _ Spring\ \
_ ArmT/Up\ '1
ArmAssemblyT/up "_, 7 //
_ _ \ Arm
_ \ Assembly
BaseAssemblyP4 i _ \ Pinch
.... , ',
'\ (Fig. A-5-2) \
Fig. A-5
15. Support CST (Fig. A-5-1)
1) Break away the (A) part shownabove Fig A-5-1 fromthe
Embossing of the Chasstsm the clockwisedKrectlon,and
hftup the Support CST
16. Base Assembly P4 (Fig. A-5-2)
I) Break away the (B) part shown above Fg A-5-2 from the
Embossing of the Chassis m the eounterelockwtse direc-
bonand hftup the Base Assembly P4
17. Opener Lid (Fig. A-5-3)
1) Hook the Spring Arm T/up on the Spht dtgged under the
Arm Assembly T/up (Refer to F=gA-5-4(D))
2) Break away the (C) Part of the Opener Lid from the
Embossing of the Chassis m the Clockwtse direction and
hftup the Opener Od
18. Arm Assembly T/up (Fig. A-5-4)
1) Confirm that the Spnng Arm T/up Is placed as above
(No 17 1)
2) Lift upthe Arm AssemblyT/up
NOTE
(1) When reassembling,unhook the Spnng Arm T/up Shown
above (No 17.1) tothe ongmal posibon
Opener Lid_
Arm Assembly T/up
19. Arm Assembly Pinch (Fig. A-5-5)
1) Oft up the ArmAssembly Pinch
10
DECK MECHANISM DISASSEMBLY
(Fig. A-6-1)
(B)..,
..
(A),:_
k
(Fig. A-6-2)
,= Motor Capstan
Washer(W1 )
_ Clutch Assembly 033
(Fig. A-6-3)
, , __ - Washer(W2) ltr Opbonal Parts
1
Lever F/R =. i I _'_;_ . Gear Assembly H-Up/D or Gear Assembly Up/D
II¢;N A.J_I_ _ I_---- {ForH_-RewmdModels_ _(ForNormalModels) I
]
HOOk(H1)
, (c) ___ -_ ,_.
\"' '_,_- (Fig. A'6-5)
/
($1)
Fig. A-6
20. Belt Capstan (Fig. A-6-1 )/
Motor Capstan (Fig. A-6-2)
1) Remove the Belt Capstan
2) Remove three Screws(S1) on the back s_de of the
Chassm and hftup the Motor Capstan
NOTE
(1) When reassembhng,Confirm the (A), (B) parts of Motor
Capstan Is located to the (A'), (B') ofthe Chassis
21. Clutch Assembly D33 (Fig. A-6-3)
1) Remove the Washer(W1) and hftup the ClutchAssembly
D33
22. Lever F/R (Fig. A-6-4)
1) Unhookthe (H1) shown above F=g A-6-4 and hft up the
Lever F/R
NOTE
(1) When reassembling, movethe (C) partof the Lever F/R up
and down, then confirmdrt)s returnedtoongmal posdzon.
23, Gear Assembly H-Up/D or Gear
Assembly Up/D (Fig. A-6-5)
1) Remove the Washer(W2) and hftupthe Gear Assembly
H-up/D
2) Remove the Spnng Up/D
3) Remove the ShdeWasher
NOTE
(1) Gear Assembly H-Up/D =sfor H_-Re_nd Models
(2) Gear Assembly Up/D =sfor Norma] Models except HPRewznd
Models
11
DECK MECHANISM DISASSEMBLY
Brake
Assembly Capstan
Gear Can (H2)
Brake
Assembly Capstan
GuideRackF/L
, Gear Rack F_
Hole
(if1)\
Gear Cam
(Fig. A-7-4)
(st) BracketAssemblyJog
A-7-1)
Fig. A-7
24. Bracket Assembly Jog (Fig. A-7-1)
1) Remove the Screw(S1) and liftup the Bracket Assembly
Jog.
25. Guide Rack F/L (Fig. A-7-2)/
Gear Rack F/L (Fig. A-7-3)
1) Remove the Screw(S2) and liftupthe Guide Rack F/L,
2) Lift up the Gear Rack F/L,
si •
HOOk(H2)
26. Brake Assembly Capstan (Fig. A-7-4)
1) Hook the Spring Capstan on the Hook(H1).
2) Unhook the Hook(H2) and lift up the Brake Assembly
Capstan.(Refer to Fig, to the right)
NOTE
(1) When reassembling, confirm that the Hole(A) of the
Brake Assembly Capstan is aligned to the Hole(B) of the
Gear Cam.
(Refer toabove Fig. A-7-4).
12
DECK MECHANISM DISASSEMBLY
Hole(A')+(A)
Gear Connector
_._,, Washer(W1)
Gear Cam
(Fig. A-8-2)
Gear Connector
(Fig. A-8-3)
.IZS
Chassis
Hole(B')+(B)
I
Gear Cam
Bracket Assembly
L/D Motor
Fig. A-8
27. Gear Drive (Fig. A-8-1)/
Gear Cam (Fig. A-8-2)/
Gear Connector (Fig, A-8-3)
1) Remove the Washer(W1) and lift up the Gear Ddve.
2) Lift up the Gear Cam.
3) Lift up the Gear Connector.
(1) When reassembling, confirm that the Hole (A) of the
Gear Connectoris aligned tothe Hole (A') ofthe Chassis
(Fig. A-8-3).
(2) When reassembling, confirm that the Hole (B) of the
Gear Cam isaligned tothe Hole (B') ofthe Chassis(Fig.
A-8-2).
(3) When reassembling,confirmthatthe (C) partof the Gear
Cam isalignedto the (D) part of the Gear Driveas shown
Fig. B-3
(Fig. B-3)
Gear Cam (C)
_ear Drive (D)
28. Bracket Assembly L/D Motor (Fig. A-8-4)
1) Unhook the three Hooks(H1),(H2) and push down the
Bracket Assembly L/D Motor.
Chassis
_ Hook (H1), (H2)
13
DECK MECHANISM DISASSEMBLY
29. Gear Sector (Fig. A-9-1)
1) Remove the Washer(W1) and liftup the Gear Sector
30. Base Tension (Fig. A-9-2)1
Plate Slider (Fig. A-9-3)/
Lever Tension (Fig, A-9-4)
I) Remove the Screw(S1) and h11up the Base "Tension
2) Liftup the Plate Slider
3) Hold the (A) Part of the Lever Tens=onand turn to the
counterclockwise direction, and then hft up the Lever
Tension
NOTE
(1) When reassembhng,turn the LeverTension tothe clock-
wise d_rect_onm maximum
14
DECK MECHANISM DISASSEMBLY
\
\
(A) '
1_ Optional Parts
ArmAssemblyIdler or ArmAssemblyIdlerJog
(For2HDModels) (For4HDModels) "x
"_ (Fig. A-10-5)
L
(H3) _
(Fig, A-10-3) ,_ _
Base Assembly P3
Fig. A-10
31. Gear Assembly P3 (Rg. A-10-1)/
Gear Assembly P2 (Rg. A-10-2)
1) Unhook the two Hooks(H1) and I_ up 1heGear _ P3
2) _ thetwoHooks(H2)andhftuptheGearAssent_ P2
32. Base Assembly P3 (Rg. A-10-3y
Base Assembly P2 (Rg. A-10-4)
1) _ve U_e_ase _ _ _ 5_ed_ ofU1e_1ow _ 6_e
CTnass,sHOle(A)and pushdown lheBase Assen'W:_yP3
2) Move theBase .assemblyP2 _nthedirec'0onoflhearrowofthe
Chass_ Hole(B) and push down _e Base AssemUy P2
33. Ann Assembly Idler Jog or Ann Assembly
Idler (Rg. A-10-5)
_) UnhooktheHook(H3)andpushdowntheAn-nAssemb_Idler
Jog
NOTE
1) An'nAss_nbly IdlerJog m for4HD Models
2) Arm Assembly Idler_ for2HD Models
NOTE
1) When reassembl=ng,confirm_ 1he (A) Part of the Gear
AssemblyP3 _salK3nedtothe(B)PartoftheGear_ P2
assho_nbelow
(Unloading Condition)
Gear Assembly P3
(
:':-':: ,,il
',. -=./ m _(B)"-'" / I
Gear Assembly P2_
15
DECK MECHANISM ADJUSTMENT
• Tools and Fixtures for Service
1. Cassette Torque meter
SRK-VHT-303(Not SVC part)
4. Torque gauge adaptor
2. Alignment tape
(See figure below)
5. Poet height ad|usting driver
3. Torque gauge
600g.Cm ATG
6. + Type driver (o 5)
Parts No:
SV-TGO-030-000 (SMALL)
SV-TGO-020-000 (LARGE)
ALIGNMENT TAPES FOR ADJUSTMENT
Derivation No.
_SAdjustmentItems_
FM Envelope
Slantness
A/C
Head Height
Azimuth
A
PAL
SP/LP
2/4 Head
D
NTSC
SP
2 Head
B C
PAL NTSC
SP SP/LP/EP
2 Head 2/4 Head
"I-rv-P2 "[-rV-N1
(TTN-N 12)
A commemiall ravailable tape
"[-FV-N1
TTV-PI (TTV-N12)
('I'TV-N1 E)
TTV-P2 TTV-N2
TTV-N2
"I-rV-P2 TTV-N2E
"I-FV-N12
A commercially available tape
SRK-VHT-303
TTV-P2L "I-I-V-N2
"]-I-V-P 1 "I-FV-N1
('T3-V-P1L) ('I-I-V-N 12)
"I-FV-P2 TTV-N2
"I-I'V-P2
X-value TTV-N2
('I-FV-P2L)
RG Post Inclination
Tape Back Tension
The numbers in ( ) parenthesis can be used as the substiture.
16
DECK MECHANISM ADJUSTMENT
1.Mechanism Alignment Position Check
Purpose:To determine if the Mechanism is in the correct position, when a Tape is ejected.
Test Equipment/Fixture Test Conditions (Mechanism
Condition) Check Point
• Blank tape • EjectMode(withCassetteejected) • Mechar_smandModeSwitch
1) Turn the Power SANon and eject the Cassette by press-
ing the Eject Button,
2) Remove the Top Cover and Plate Assembly Top, visual-
ly check if the Gear Cam Hole is aligned with the
Chassis Hole as below Fig. C-2.
3) IF not, rotate the Shaft of the Loading Motor to either
Clockwise or Counterclockwise until the Alignment is
as below Fig. C-2.
4) Remove the Screw which fixes the Deck Mechanism
and Main Frame and confirm if the Gear Cam is aligned
with the Gear Drive as below Fig. C-I(A).
5) Confirm if the Mode S/W on the Main P.C.Board is
aligned as below Fig. C-1(B).
6) Remount the Deck Mechanism on the Main P.C.Board
and check each operation.
CHECK DIAGRAM
BOI-FOM VIEW
ModeS/W
Gear Cam _ ==
..
(.),gP- Ill
3earDrive _
Gear Cam (n) and Gear Drive (o) groove alignment
Fig. C-1
L/DMotorAssembly
Gear Cam
Chassis Hole
Gear Cam Hole
TOP VIEW
I Fig. C-2
I
I
17
DECK MECHANISM ADJUSTMENT
2. Preparation for Adjustment (To set the
Deck Mechanism to the Loading state
without inserting a Cassette Tape).
1) Unplugthe Power Cordfrom the AC Outlet
2) Dtsassemble the TopCoverand PlateAssemblyTop
3) Plugthe Power Cordinto theAC Outlet
4) Turnthe Power S!Wonand pushthe Lever Stopper(L),(R)
of the HolderAssemblyCST to the back for Loadingthe
CassettewithoutTape
Cover the Holesofthe EndSensorSat the bathsalesofthe
BracketS=de(L)and BracketAssembly Door topreventa
light leak
ThenThe DeckMechanismdnvesto theStopMode
In this case.The Deck Mechan=smcan accept=nputsof
each mode,howeverthe Revandand Renew Operahon
can notbe performed for more than a few seconds
becausethe Take-upReelTableB ;nthe StopStateand
cannotbe detec'_ed'theP,eelPulses
3. Checking Torque
Purpose: To insure smooth Transport of the Tape dudng each Mode of O_
If 1he Tape Transport is abnent_, 1hen check the Torque as indicated by the chart below.
Test Conditions (Mechanism
Test Equipment/Fixture Condition) Checking Method
• Torque Gauge(60Og/cm ATG) • Play (FF) or Review (REW) Mode i • Performeach Deck MechanismMode_thout
• Torque Gauge Adaptor mserbnga CassetteTape(Referto aboveNo2
• Cassette Torque Meter PreparabanforAd_s_ent)
SRK-VHT-303 • Readthe Measurementofthe Take-upor Supply
Reelson theCassetteTorqueMeter_FigC-3-2).
• Attachthe TorqueGaugeAdaptorto theTorque
Gaugeand thenread the Value ofrt(FigC-3-1)
Item Mode Test Equipment Measurement Reel Measurement Values
FastForwardTorque Fast Forward Cassette Torque Gauge Take-UpReel More than 400g/cm
Rewind Torque Rewind Cassette TorqueGauge Supply Reel More than 400g/crn
PlayTake-Up Torque P|ay Cassette Torque Meter Take-Up Reel 75-115oJcm
ReviewTorque Rev=ew CassetteTorqueMeter SupplyReel 130~200g/m
NOTE:
The Vatues are measured by using a Torque Gauge and
Torque Gauge Adaptor with the Torque Gauge affixed
• Cassette Torque Meter (SRK-VHT-303)
Fig. C-3-2
NOTE:
The Torque reading to measure occurs when the Tape
abruptly changes direction from Fast Forward of Rewind
Mode, when qu=ck brackmg Is apphed to both Reels
• Torque Gauge (600g.cm ATG)
i __Torque Gauge
_TorqueGauge
Adaptor
<ll-._ReelTable
Fig. C-3-1
i
18
DECK MECHANISM ADJUSTMENT
4.Guide Roller Height Adjustment
Purpose: To regulate the Height of the Tape so that the Bottom of the Tape runs along the
Tape Guide Une on the Lower Drum.
4-1. Preliminary Adjustment
Test Equipment/Fixture
• Post HetghtAdjustmgDnver
Test Conditions(Mechanism Condition) I
• Playor Revrew Mode
Adjustment Point
• Guide Roller Height Adlustment
screws on the Supply and Take-Up
Gutde Rollers
Adjustment Procedure
1) Confirmd the Tape runs along the Tape Guide Line of the
Lower Drum
2) If the Taperunsthe Bottomofthe Gu_e Line.rumthe Guide
RollerHeightAdJustmentScrewtoClockwisedfrec_on
3) Ifit runsthe Top,turnto Counterclockwisedirecton
4) AdjusttheHeightof theGuideRollerto be gutdedto theGuide
Lineof the LowerDrumfTomthe Startingand EndingPointof
the Drum.
ADJUSTMENT DIAGRAM _Guide Holler Height
, _ jttju_tm_t screw
I Upper Flange
_i _ q--Guide Roller
._ Retaining Screw
Fig. C-4-1
4-2. Precise Adjustment
Test Equipment/Fixture TestEquipmentConnectionPoints
• Oscdloscope
• AhgnmentTape
• Post Height Adiustmg
Dnver
• CH-1 PB RF Envelope
• CH-2 NTSC SW 30Hz
PAL SW 25Hz
• Head SwitchingOutput
Pomt
• RF Envelope Output
Point
TestConditionsVCR(VCP)State
• PlayanAhgnmentTape
Waveform Diagrams
P2 POST
ADJUSTMENT
Adjustment Point
•Gutde RollerHetght
AdjustmentScrews
Adjustment Procedure
1) Play an AlignmentTape after connectingthe Probeofthe
Oscilloscopeto the RF Envelope Output Test Porntand
Head SwttchmgOutput Test PomL
2) Trscktng Control(m PB Mode) . Center Posttton(When
thts Adjustment msperformed after the Drum Assembly
has been replaced, set the TrackingControlso that the
RF Output isMaximum).
3) Hetght Ad}ustrnentScrew Ratlen the RF Waveton'n
(Fig C-4-2)
4) Turn(Move) the Tracking Control(m PB Mode)
ADJUSTMENT tof_dtenthe waveform.
Fig. C-4-2
Clockwise and Counterclockwise (Fig C-4-3)
5) Check thatany Dropof RF Output ,s uniformat the
Start and End ofthe Waveform
NOTE
If the adjustment ,s excessive or insufficient the tape
wtll lam or told
- lLIU]lHIIlllll!lll/llillllllIHlI
Turn(Move)the tracking
Trackingcontrol at center control to both directtons
Fig. C-4-3
Connection Diagram
OSC,LLOSCOPE
RFENVELOPEOUTPUTTESTPOINT --
HEADSWITCHINGOUTPUTTEST
POINT
19
DECK MECHANISM ADJUSTMENT
5. Audio/Control (A/C) Head Adjustment
Purpose: To insure that the Tape passes accurately over the Audio and Control Tracks in exact IAlignment in both the Record and Playback Modes.
I
5-1. Preliminary Adjustment (Height and Tilt Adjustment)
Perform the Preliminary Adjustment, when there is no Audio Output Signal with the Alignment Tape.
Test Equipment/Fixture Test Conditions (Mechanism Condition) Adjustment Point
• BlankTape * Tilt AdlustmentScrew(C)
• Screw Driver(+) Type 5mm * Play the blanktape * HeightAdjustmentScrew(B)
• AzimuthAdjustmentScrew(A)
Adjustment ProcedurelDlagrams
1) In,batty adjustthe Base AssemblyA/C Head as shown
Fig C-5-1 by using the HeightAdlustrnentScrew(B)
2) Play a BlankTape and observe# the Tape passes accu-
rately over the NC Head without Tape Cudmg or
Folding
3) If Folding or Cudmg zs occured then adjust the Tilt
Adjustment Screw(C) while the Tape is running to
resemble Fig. C-5-3.
4) Reconfirm the Tape Path after Playbackabout 4~5 sec-
onds.
NOTE
Ideal NC head height occurs, when the tape runs
between 0 2-0.25mm above the bottomedgeofthe NC
head core
Fig. C-5-1
AJCHead -- !
P4
Fig. C-5-3
-- Tape
X-Value Adjustment
Fixed Screw
Azimuth Acljustmeftt Tilt Adjustment
Screw(A} ScrowlC) I
Height Adjustrneflt
Screw(B)
A/C Head Assembly
Fig. C-5-2
2o
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Aiwa D33 Service User manual

Aiwa
Brand
Aiwa
Model
D33 Service
Category
Cassette players
Type
User manual
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