Teac C-1 Service Manual page 34

TABLE OF CONTENTS
TAPE TRANSPORT SECTION
1 Systemcontro] LS]... 2... ees 3
1=) Introduction; <:s.6..66 643 6 so 6 ee ee RE NA EB ais 3
1-2 Input - output conditions and terminals... .........-....000-. 4
V3; Operation: eiteag ng PSE ee i ia ane eee ae ois Hee Sy 5
1-4 Output signal generating conditions ............-0- 2-0-2 ee eee 6
2. (Control PiG.By ip 0k etree ee Bt he ti Po eee ee 7
2-1 Initial power reset circuit... 0. ee eee 7
2-2 Solenoid drive circuit... 2... ee 8
2=3. Tape loading circuit... ss. sees BE i Bore bee Se eee 10
24. Play and pause sg iddear giao wore Wie 1s eit gee Sarge ence a Hoes eetacle de 11
2-5 Fast forward andrewind.......... 0.0.00. eee eee eee 12
2-6 Recording and record muting. ... 0.0... 0... eee eee eee ee eee 12
2-7 Tapeend ditection circuit... 0... ee eee 13
2-8 Automatic rewind circuit... 2... ee ee 14
2-9 Timer control circuit... 0... es 16
3° -Capstan Motor circuit. 2 eee ee eens Gg ales De RES AE 18
4 Reel motorcontrol P.C.B... 2... eee 19
4-1 Tape loading: 0466 60.4 00% cee hee Me aed Vee eae pe 19
A): (Play Mode. 2,35 ssi auiens OS. aera a ae ab, Vert Nate pulang a 19
4-3 "Pause: mode:: 24 ec seahc cd we ea 6 thee BLOM RE LES 19
4-4 F.Fwdand rewind modes......... 0.20.00 e eee eee ees 20
AMPLIFIER SECTION
Le S [Introduction e235. Agia Macatee ow ee pig Bn a Rea eae Te Ved wes es 21
2 Electronic switching... 2... 0. ee ee 21
21 BER SWitChes: 2 sstietay se, occ hee Chk Ue elena ad Oe SS shea dai 21
2-2 Transistor switches... . 0.0... . ee ee ee ee 21
3. Signal switching circuit. 6... ce eee 22
3-1 NRsystemcircuit 2... . kee eee eee 22
3=2, MONitOrcircuit® <2 ..6 9 dle os ale eons, dee Ok a, Haren aer ota OM 22
4 Playback amplifier P.C.B.. 2... ee ee eee 24
4-1 Playback equalizer amplifier... 2.2... 0... eee ee ee eee 24
4-2 Playback line amplifier... 2.0... ee eee 25
4-3 -Dolby* decoder... Soc. G58 be arate po Ee te ee 25
4-4 Playback output amplifier... 2... ee eee 25
4=5 Phone amplifier... 6.056. cee react eee pee ee ee ele 25
5 Recording amplifier P.C.B. 1.0... 0... ee eee 25
6 (OSCR ©: Biss cs tee iesca ns, Badd Hae Gee LATS ee la tw aides 26
6-1 Bias osc control circuit... 1... ee 26
6-2 Record control circuit... 2... ke ee 26
6=3 -PMM drive units... 5 ibe eke te te eee ee ae ee aera 27
7 Dolby encoder/decoder... ... 0.2... ee et ee 28
GA EnCode tes :2 sce fae hag Zeck d eed ede dae ss AT A Ae at ah Bay BIN 28
TH-2) DOCOd ER ook ah hE ean fod Bhi Gig epee eed Ba an Me 28
8° "Power muting CIRCUIT so 55 coe ed ee pe a es Be as 29
* Noise reduction circuit made under license from Dolby
Laboratories. The word "Dolby" and the Double-D
symbol are trademarks of Dolby Laboratories.