Aiwa D33 Service User manual

Brand: Aiwa

Model: D33 Service

Category: Cassette players

Type: User manual

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

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.

_3A

Z3,4

Z3.43_

Z3,4,5

2,3

_1_

Z_1Z14

_13

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-21

A-3

A..3

A-4

A.4

A-4

A-5

A..5

A-5

A-'3

&-5

Rg-

ure

A-6

A..6

A-7

A-8

A,,8

A,.9

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

DECK MECHANISM DISASSEMBLY

Plate Assembly Top

(B)

(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)

($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

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

DECK MECHANISM DISASSEMBLY

(Fig. A-6-1)

(B)..,

(A),:_

(Fig. A-6-2)

,= Motor Capstan

Washer(W1 )

_ Clutch Assembly 033

(Fig. A-6-3)

, , __ - Washer(W2) ltr Opbonal Parts

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

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).

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)

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)

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

DECK MECHANISM DISASSEMBLY

(A) '

1_ Optional Parts

ArmAssemblyIdler or ArmAssemblyIdlerJog

(For2HDModels) (For4HDModels) "x

"_ (Fig. A-10-5)

(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_

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

PAL

SP/LP

2/4 Head

NTSC

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.

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

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

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

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.

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 -- !

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

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Aiwa D33 Service User manual

Brand: Aiwa

Model: D33 Service

Category: Cassette players

Type: User manual

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Aiwa D33 Service User manual

Aiwa D33 Service User manual

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