User manual KENWOOD TR-7950 SERVICE MANUAL

[. . . ] NO USER-SERVICEABLE PARTS INSIDE, REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE PRESENCE OF UNINSULATED "DANGEROUS VOLTAGE" WITHIN THE PRODUCT'S ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK TO PERSONS. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE APPLIANCE. Introduction M-A300/A100 (En) Unpacking Unpack the unit carefully and make sure that all accessories are put aside so they will not be lost. If your unit is damaged or fails to operate, notify your dealer immediately. If your unit was shipped to you directly, notify the shipping company without delay. Only the consignee (the person or company receiving the unit) can file a claim against the carrier for shipping damage. [. . . ] 2 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 In case of difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Special features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Controls and indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 System connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Terminal connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Connection of M-A300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Connection of TR-7950 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Special features Power amplifier for surround play This unit is the amplifier designed exclusively for use with the surround speaker, center speaker and subwoofer for the surround system of the SERIES 21. This unit allows you to enjoy the surround play more effectively. New TRAITR transistor adopted in the final stage A new TRAITR transistor which features superior temperature tracking characteristics has been adopted in the final stage of the power amplifier block. The unit can be turned ON and re-used when the temperature drops, but the fundamental solution of the problem is not possible unless the unit installation (heat radiation) condition is corrected. · Connect them properly referring to "System connections". · Connect it properly referring to "System connections". · Connect it properly referring to "System connections". Sound cannot be produced. Sound from the surround speaker is not produced or very low. · The speaker cords are not connected. · One of the speaker cord is not connected. · A speaker cord is not connected. Note Do not use contact cleaners because it could cause a malfunction. Be specially careful against contact cleaners containing oil, for they may deform the plastic components. Specifications M-A300 Caution : Read this section carefully to ensure safe operation. TR-7950 AUDIO section M-A300/A100 (En) 8 AUDIO section Effective output power during STEREO operation [Except for the U. S. A. , Canada and the UK] 1kHz, 10% T. H. D. , at 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 W + 100 W Rated output power during STEREO operation [For the U. S. A. and Canada] 100 watts per channel minimum RMS, both channels driven, at 6 from 20 Hz to 20 kHz with no more than 0. 09 % total harmonic distortion. (FTC) [For the UK] (DIN) 1 kHz, 0. 7% at 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 W + 100 W (IEC) 63 Hz ~ 12. 5 kHz, 0. 7% at 6 . . . . . . . . . . . . . . . . . . . . . 100 W + 100 W [For other countries] 1kHz, 1% T. H. D. , at 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 W + 80 W Effective output power during SURROUND operation [For the U. S. A. , Canada and the UK] FRONT (1kHz, 5% T. H. D. [. . . ] 20 Hz ~ 70 kHz, +0 dB, ­3 dB Signal to noise ratio (IHF'66) LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 dB Input sensitivity / impedance LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 V / 47 k Effective output power during STEREO operation [Except for the U. S. A. , Canada and the UK] 1kHz, 10% T. H. D. , at 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 W + 100 W Rated output power during STEREO operation [For the U. S. A. [. . . ]