Sony tc 645 schematic

Page 1

TC-645 'I'C-645

SCHEMATIC DIAGRAM

AUDIO AMP CIRCUIT BOAR?

IcIoI TA'IIZZAP IcIoz mam - OIOI 250364 ' _ 030L302 25¢qu _ - 0303 306 2 _ on I A
- leagues mm? c. . nus man 022 " Iev mos 21x 23v Rm 390 I
WI .: m a new 9 6.8K ::2.2I< Io/zsv PLAYBACK 4 v . u am
" 'sz 3 " ' - 3 L-CH rah: $2385 3%? -��=§s'9m $.25 "i? 7%? w m In no.
"9 w -��30 1 Imam-m C 3 >2 C 4 an m m'tu "5 0""
«50v 47/25v stznm 330 om mas m W- w I V cio's l "3 Mn N 43;; 'W .9 "" 347/sz in ' IL)
. . msv £36.,
-1 ' 3m m. 26? t is g; ism era? 3%? 2:03 mm W 05322" ""235 iii) sglrfi )1st a? M R 7
MI JIDl ,moa 252v .sv _ ., 5v '49/754 gag m9 all 9 -c - 2? c307 mz LJ 0305 ./ x a no r . .
ILI am an ans r Inn (1022 now . , 22x I e Um . cm a vane?» -
m Io 5 32* on "5 H} 1" (x) 25v £33 0082 m. L
Iza LJZ Rlol RIB} 5'05 . R 74:59 2 film we as: 1' a? ' 5L5? Lc 1'1??? .Efi' " T 23:8 cm .[L - / m
33°09 1 M l00klN)\ Ll-zlgv = 22?3 IOOHN) 51%, .Em 82x In? :5ng sm-s SIoH "WHZOZ bvfig/(Ngagglzos 3&9 gag 2:23 : 33-: 47)th 7328 III
LINEHIOIT mg m [T- 220] 'I- a IngI: 4- .0_
m I $51M BgARngCH 550' 3 TAPE SPEED swncu7 SIM ' ' SE ' ' sz-I $301: gram"!
. - r;_4 .
- . |_; CIRCUIT BOARD /t'i:;- 35.3
«2 I 25v
I 9 "E r - . CK - - --< a?
RECORD . 3
I R-CH SAME AS L-CH m. SAME AS L-CH 0403 3:?
REFERENCE NUMBERS ARE .. REFERENCE NUMBERS ARE I? no
comm FROM 201 . ' ( )
I? ' CODED FROM 401. or? I I use.
a . mum: ¢
231 3 ' ' smsrmm F
. - cTiéchFrEEatfilfiimc '70 g 1023 9*
LI MIC ' ' :: __
mg R230 (AE35V) sznn um --I 1/ m M
Fuzz _ . I mac-2902 - - m ,
"52 a CEQLHAEQSEEML ____________ *moz 5" L _'
9 G) .._ 'I cm cm -
, um soz-I sroz-z 4 f I}: TAPE SPEED
0 o ' l - CIZSL ' -9de ' - SWITCH
a l "2 55p «-��225 . , CIRCUIT BOARD
m. (an I _ 500v clés D d 2325 5533] -- » .. I
53 9502 ESL, | I/sov E00: I-4
25v I LJ -t» 5&4 : ,
_. I ,- .
JACK I 22m» j V
Em? {arm El _
- 4% :, .9
_ _ . I _ _
T
m imbj 2:551:33
(U Ens-290m
-| mos X
L
-1 arr or; 0;? 05F
R609 newlmn Teéonn 5" W . _
TAPE SPEED - 12° 5? 0605 0601 0602.603 osowsoa New
SWITCH . V I 7 - 250364 250291 25mm SIBOI-OZ {gm m» m '
CIRCUIT BOARD - 60 I '3 I I 0 All capacitors are in uF unless otherwise noted. p: [Jillr
550'1_J -,-:<-l I I Vmfi "50 "0) 0 All resistors are in 9.. V. \V. unless otherwise noted. k= 1,000
' I L L 53.; 2%?ng m m new . not M = 1,000k
1 POWER 32 '5 _ . UGO? , O 7) indicates chassis ground.
f SUPPLY 5&5 J E o (N) indicates a low-noise,
i CIRCUIT 45%| 0v 0 Voltages are DC with respect to ground unless otherwise noted.
i BOARD ' éov L Readings taken under no-signal conditions with a VOM (20kQ/V)i
S7.06 Readings in( ) are in record mode.
' I 4&3 Voltage variations may be noted due to normal production

- f6
_ 800ml
I? f-f- '
' A

tolerances.
T -1 SYSTEM- CONTROL CIRCUIT BOARD 0 AC voltage readings on bias oscillator circuit taken with :I VTVM.
I 1070 am. .4 (J j 51339312 I ' D701~704 -SlBoI-02 r5 II M 0 Switch Mode:
: I I I PINCN ROLLER K Ref No. Switch Moda

. K I 5 ' W02 ' l l t
c712 $3332 fli. cm {Z- 132%; T m ,4 2 5101. m Rec MODE (ON/Ol F) on

we? 400v - Egg: -2 «AW -2 [134--< Ltd-7 - Ieov ' my]; 5102 BIAS (LOW/HIGH) LOW

5 W 7% 1 5103 HQ (NORMAL/SPECIAL) NORMAL

. L_( _ T ' 0705 m 5301 401 MONITOR (SOURCE/TAPE) TAPE

FUNCTION SW'TCH L DTIO - - mi-40319;" 5501 TAPE 5171313309 [95 ) 19 ~
CIRCUIT BOARD I 7 00? I 1.056 5383' cm . cm em
I mmlsw' 351 L °°°?$m ELII-t S701 POWER (ON/OFF) or]:

mgr Hm. w solenoid hold (high Voltage/low voltage)
"javzoo: % 5702 High voltage when the function levers low voltage
>- I T 70 (except stop lever) are depressed.
slos 0)J K m shut-off (ON/OFF)
0- S703. 704 ON when the tape is threaded or the OFF
5 502 91 tension arm is activated.
CAPSIAN Isz-up 909m 5704 S705 function (REC/OFF)
S706 function (rewind/OFF)
S707 function (fonNard/Olil)
_ 26 __ S708 function (fast forward/OFF)