Pioneer PL-4 Service Manual page 2

= For the circuit and mechanism descriptions, please refer to the supplement of model PL-7
service manual (ART-768).
CONTENTS
1. SPECIFICATIONS ...........2 000s eee 2
2. FRONT PANEL FACILITIES.............. 3
3. DISASSEMBLY ... 0... eee ee ee eee eee 4
4, TROUBLESHOOTING. ...........00 000 es 6
5. PRECAUTIONS FOR REASSEMBLY........ 10
6. BLOCK DIAGRAM.......... 00ers 12
7. P.C. BOARDS CONNECTION DIAGRAM..... 13
1. SPECIFICATIONS
Motor and Turntable
Drive System 1.0... eee teen eae Direct-drive
IMG BOF sister, ly ecncte te cabin, bes gris Sens Dhansel ROEUE, Cate Hen eee iets DC servo motor
Turntable Platter. .........310mm diam. aluminum alloy die-cast.
SPECS ye 865 suh fisidanctivns elhenttw oem Wamesianace6 Alea 33-1/3 and 45rpm
Wow and Flutter .............02 000 Less than 0.025% (WRMS)
Signal-to-Noise Ratio..............--. More than 78dB (DIN-B)
(with Pioneer cartridge model PC-3MC)
Tonearm
TY Dh are oes Aucune ee ecole Static-balance type, Straight pipe arm
Effective Arm Length ..........2--2 2200-2 eee eee 221mm
Overhang: escaped acess dow ogc Gee ert acs ale de aa 15.5mm
Usable Cartridge Weight ........-.-.. 3g (min.) to 8g (max.)
Subfunctions
Auto-return mechanism, Anti-skating force control, Stylus pressure
direct-readout counterweight, Cueing device, Strobe light, Free
stop hinges
Miscellaneous
Power Requirements. ........... 00 0 ee es AC120V, 60Hz
Power Consumption ...........000 0000 cece OW
Dimensions .............. 420(W) X 108(H) X 367(D)mm
16-1/2(W) X 4-1/4(H) X 14-7/16(D)in.
Weight 0 .'65 5.0. Sg iy ee vslare A gh Bla teen plete 5.8kg/12 ib 12 oz
2
8. SCHEMATIC DIAGRAM...............- 15
9. EXPLODED VIEWS .............-.00.0. 17
10. ELECTRICAL PARTS LIST.............. 22
11. ADJUSTMENTS. ..........00.- 2002 eee 23
REGLAGE. cal tyies cea uae naam 24
AIJUST Eee ie GGA Reh Ae eed Ea ee 25
12.:-PAGKING cc 8d 4s Saas ore whee ee 26
Accessories
EP Adapters 5.3.22 foes Se lense ce ek tee ee he WS Rte SEN ie 1
Operating Instructions... 2... ...0.0.0.00.000. 000 eee ee 1
NOTE:
Specifications and design subject to possible modification without
notice, due to improvements.
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