Carver CT6 pre sm

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CARVER

Model CT-6lPSC-6O

SERVICE MANUAL

CONTENTS

Page
SAFETY INFORMATION ............................................................................... 2
SPECIFICATIONS ............................................................................................. 2
ALIGNMENT PROCEDURES I 4
VOLTAGE CONVERSION .................................................................................. 6
BLOCK DIAGRAM .............................................................................................. 7
IC BLOCK DIAGRAM ............... . 9
PCB COMPONENT SIDE VIEWS .................................................................... 15
EXPLODED VIEWS .......................................................................................... 21
PARTS LIST ....................... I 23
DIFFERENT PARTS LIST ................................................................................ 27

SCHEMATIC DIAGRAMS ................................................................................. 29

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SAFETY INFORMATION
WARNING

Any person performing the procedures described in this manual will be exposed to hazardous
voltages and the risk of electric shock.

Carver Corporation assumes that any person who removes the cover from the unit has been properly
trained in protecting against avoidable injury and shock.

Therefore, the procedures described here are to be performed by qualified electronics service
personnel only.

We recommend that the unit be tested only when line isolation is provided by an isolation transformer.
The line cord of the unit must be disconnected and the power supply fully discharged before any
components are replaced. Failure to do so may result in severe damage to the unit and the risk of
electric shock.

The safety tests described in the CAUTlON information located on the schematic diagram must be
performed properly.

SPECIFICATIONS
Preamplifier Section
Frequency Response Phono FllAA+/-1dB
Line level 20Hz-20kHz(+/eo.5dB)
Input Impedance (a 1kHz Phono 47k ohms
Line level 30k ohms
Sensitivity for 1V RMS output Phono 2.5mV (+/*300}1V)
Line level 150mV (+/-20mV)
Maximum input level 1kHz Phono 120mV
Line level >8V
S/N ratio A weighted Phono 80dB below 5mV input level
Line level 95GB below 1V output level
Hologram on BSdB below 1V output level
Maximum output level Preamp out 6V FiMS
Tape out 6V RMS
Headphone out 300mV with 8 ohm load
Headphone output level with 1V at pre out 125mV with 8 ohm load
THD 008% 20Hz-20kHz at 2V RMS out
Output impedance Preamp out 680 ohms
Tape out 1k ohms
Headphone out 150 ohms
Minimum recommended load impedance
Preamp out 2.5K ohms
Tape out 2.5K ohms
Gain Line level in to Tape out 71dB
Channel balance (a max. volume <2dB
Tone controls Bass +/-8dB at 100Hz (+/-2dB)
Treble +/-8dB at 10kHz (+/~2dB)
Loudness +5dB at 100Hz, +3dB at 10kHz
Mute effect 720dB
Channel separation 1kHz 56dB
10kHz 40dB
Sonic Hologram Generator image resolution 5 deg. horiz. 20 deg, vert.