Revox B225 Maintenance Instructions Manual

o^Tfp nrmr^rs) R E I / Q X ' . B225
IiILI„OF_CgNTEyTS page
1. GENERAL
1-1 Index of CO olayer controls 1/i
1*1* 1 General controls 1/1
1*1*2 Special controls
1/2
1*1*3 Rear panel connectors 1/3
2.
t
REMOVAL OF ASSEHBLIES
2.1 Removing the top cover 2/1
2*2 Removing tne side panels 2/1
2.3 Removing the individual circuit boards 2/1
2*4 Removing the player mechanism 2/1
2®5 Removing the display
2/2
2*6 Removing the po^er t r ansf or mator 2/2
2*7 Removing the drawer motor
2/1
2*8 Removing tne operating panel 2/3
Z«9 Removing the guide rods 2/3
3* CIRCUIT DESCRIPTIONS
3.1 SERVO 1 PC3 1.759.310 3/1
3.1®1 Stabilization of the supply voltages 3/1
3*1*2 Orawer position detector 3/1
3*1.3 Focus control loop 3/2
3*1*4 Oisc motor control loop 3/2
3.2 Microprocessor PC3 . 1.769.320 3/3
3.2*1 Microprocessor system 3/3
3^2*2 Drawer motor control 3/4
3*3 SERVO- 2 PCP 1.769*330 3/4
3.3^1 Radial control 3/4
3*3.2 Radial control circuit 3/4
3*3*3 Automatic gain control- {AGC-} circuit 3/5
3«3r-4 Offset control circuit. 3/5
3.3.5 Track detecting circuit 3/6
3*4 Preamplifier and laser PCB 1*769*100*35 3/6
3.4.1 Laser control 3/6
3*4^2
Focus and
radial control signals 3/6
3«4*3 HF signal amplifier 3/6
3.5 Decoder PCh l-7o^.300 3/6
3* t > • 1 D i g i t a l s i g n a l p r o c e s s i n g 3/7
3»5«2 Digital sine-wave generator 3/7
3. 5. J
HFL and
0 - J detector 3/7
3*o OAC TC3 1.769.23 3 3/7
3.t».l digital filtering (oversampl ing) and 0/A conversion 3/7
3*6.2 Level adjustment and headphones amplifier 3/3