INSTALLATION INSTRUCTIONS MODEL PA635 SIX CHANNEL POWER AMPLIFIER WITH IR CONTROL TABLE OF CONTENTS Section Title Page GENERAL INFORMATION ................................................................................................................................. 2 PA635 PANEL AND FEATURE DESCRIPTIONS................................................................................................. 3 Factory Default Settings, Item #9.....................................................................
Page 2 Model PA635 GENERAL INFORMATION To enhance the ease of installation and obtain optimum performance from the PA635, we recommend that you first become familiar with all its features and special capabilities by studying the descriptions and instructions in this manual. The PA635 was designed to meet the audio power amplifier needs of custom installed multi-room, multi-zoned systems with high sonic quality.
Model PA635 Page 3 Individual ON/OFF of Amp Pairs. Permits Standby ON/OFF control of individual channel pairs. Specifically, it permits the STATUS outputs (12 Volts On/Off) of Xantech ZPR68 zones to switch the Standby of the PA635 channel pairs (CI) On and OFF with zone ON and OFF commands. Remote Master ON/OFF. Allows the entire PA635 to be powered ON and OFF by a positive DC voltage ranging between 5 and 30 volts (16mA @ 12V).
Page 4 Model PA635 NOTE: The PA635 may also be powered ON/OFF with an external AC line switch into which the power cord of the PA635 is plugged (such as the switched AC outlet of a preamp, timer, etc. with a 10A rating). For this type of operation, leave the POWER switch depressed to the MANUAL ON position. 4. Status LED Indicators. These indicators, one for each channel pair, provide the following status information: a) They show Power ON/OFF and Standby ON/OFF conditions.
Model PA635 Page 5 In STEREO mode, the two amplifiers operate independently of each other for 35 Watts of output each, except IR control of Volume, Max-V, Mute, Standby OFF/ON and Balance functions is common to both. In MONO mode, left and right input signals are summed internally for Mono output from each of the two amplifiers. Also, either the Left or Right (item #5) input may be used if the source is already a Mono signal.
Page 6 Model PA635 word "BRIDGED" on the panel above the 4-terminal connector when connecting the 2-conductor wire to the speaker. 13. REMOTE MASTER ON/OFF CONTROL. This 2-terminal connector allows the entire PA635 to be powered ON and OFF by a control voltage ranging between 5 and 30 Volts DC (16mA @ 12 V). Be sure to observe the marked polarity.
Model PA635 Page 7 Applicable RC68+ Button Descriptions 1 10 A 80 2 B 48 C 10 90 1 2 3 4 00 C0 50 D0 5 A ADJ-OFF 6 INPUT 7 01 41 8 40 A0 B0 21 20 E0 30 70 F0 61 TREBLE BASS Z-ADJ VOL 60 88 18 98 9 GLOBAL 09 MUTE 3 08 A8 38 B8 ON OFF 28 E8 78 F8 E-FLAT LAST MAX-V TRIM 68 C8 58 D8 49 OFF 29 8 7 69 C-BAL E1 89 C9 A9 E9 71 19 59 39 79 F1 99 D9 B9 F9 6 5 4 RC68+ PROGRAMMER Figure 4 – The RC68+ Programmer 1. IR Emitter Lens. 2.
Page 8 Model PA635 4. C-BAL Command. Instantly returns the balance to the Center position (equal volume in each channel) from any previous setting. 5. Balance Commands. When the Balance "arrow" buttons are pressed, the audio output will move to the left or right (with a 2 dB/step reduction in the attenuated channel) with each left or right press. NOTE: These commands do not ramp. That is, no change will occur if the BALANCE buttons are held down continuously! 6. MAX-V.
Model PA635 Page 9 INSTALLATION - PHYSICAL LOCATION AND MOUNTING When you mount the PA635, you should plan its location carefully. Pay attention to each of the following factors: Upper shelf, component, wall, etc. PA635 Keep perforations on top cover free of obstructions for max. cooling effect. To maximize air flow, route single large opening in lower shelf. Convection Airflow 2-inch spacing (minimum) Keep perforations on bottom plate free of obstructions. Figure 5 – Horizontal Mounting 1.
Page 10 Model PA635 CONNECTING THE PA635 When making connections to the PA635 be sure the power cord is unplugged. Proceed as follows: Preamp Outputs ZPR68, etc. VIDEO RCA Type Patch Cords L AUDIO R Set MODE Switch to STEREO position 1 PA635 Rear Panel LEFT 1 MODE STEREO MONO BRIDGED RIGHT COMMON CI GROUND STATUS IR IN LOCAL + BRIDGED -- SPEAKER LEFT RIGHT + -- -- + Be sure speakers are connected with correct polarity as shown. + + Wall speakers, shelf speakers, etc.
Model PA635 Page 11 CAUTION: After lead ends are inserted and the screws tightened down, be sure there are no free strands that could cause shorting! Speaker Phasing To obtain stable imaging and full bass response, it is imperative that stereo speakers be connected "in phase" with each other. You can verify this as follows: a) If the "+" (positive) and "–" (negative) terminals on your speakers are correctly marked, and visible, and you have wired the system as shown in Figs.
Page 12 Model PA635 To make connections for the BRIDGED mode, follow the steps given before for stereo connections, but with the following differences: 1. You may connect the RCA-type patch cables from the OUTPUT jacks of the driving preamp or other source to either the LEFT or the RIGHT input jacks of the bridged pair, as shown in Fig. 7. Do this for just the amplifier pairs you wish to run in the bridged mode.
Model PA635 Page 13 CONTROLLED SOURCE COMPONENTS CD Changer L L R Cassette DecK Satellite Receiver AM/FM Tuner R V L L R 286M Dual Blink-IR R Mouse Emitters (2) RCA type Patch Cords 6015900 To Video Distribution (if used) 3 4 RS41AV VIDEO REMOTE SWITCHER IR CONFIRM ® EMITTERS SYLMAR, CA MADE IN U.S.A. AUDIO LEFT RS41AV Power Supply 3.
Page 14 Model PA635 CAUTION: When changing the group numbers, you must connect an IR receiver to each amplifier pair's IR input (item 11, Fig. 3) one at a time. You cannot use the Common IR Input (item 15, Fig. 3) as this will change them all to a different, but same number. 7. After the Code Groups are set up, "teach" volume and other commands from the RC68+ Programmer (Fig. 4) into learning remote controls (and the keypads) dedicated to each room.
Model PA635 Page 15 CONTROLLED SOURCE COMPONENTS CD Changer L L R Cassette DecK Satellite Receiver AM/FM Tuner R V L L R 286M Dual Blink-IR R Mouse Emitters (2) RCA type Patch Cords IR Signal To Video Distribution (if used) 4 RS41AV VIDEO REMOTE SWITCHER ® RS41AV Power Supply AUDIO RIGHT INPUT IR CONFIRM SYLMAR, CA MADE IN U.S.A.
Page 16 Model PA635 Connecting the REMOTE MASTER ON/OFF CONTROL Terminals As mentioned under "PA635 PANEL AND FEATURE DESCRIPTIONS", the REMOTE MASTER ON/OFF CONTROL terminals allow the power to the entire PA635 to be turned ON and OFF by a remotely applied DC Voltage. Fig. 10 is a typical applications using this feature. Using a DC Power Adapter as a Control Voltage Fig. 10 illustrates how a PA635 can be switched ON and OFF via the switched AC outlet on the rear of a preamplifier or other control center.
Model PA635 Page 17 CAUTION: When making this connection, do not use the included 220 Ohm resistor! Refer also to CAUTION notes, Fig. 9. When any one of the zones is turned ON, the common CO goes high (+12V), turning on power to the entire PA635. Similarly, when the last zone is turned OFF, the CO drops to 0 V, turning the PA635 totally OFF. NOTE: No IR control of the PA635 is used in the system shown in Fig. 11. All volume, mute, etc. functions are handled by IR control of the ZPR68-10.
Page 18 Model PA635 TROUBLE SHOOTING If you encounter a problem, please review the items in the following list. Be sure, in addition, to check other system components, such as preamplifiers, CD players, speakers, speaker wiring, etc., that may be at fault. PROBLEM PROBABLE CAUSE AND SOLUTION Front Panel LEDs and rear panel power indicator does not light – no sound. Check line cord for good contact in a live AC outlet. If the REMOTE MASTER ON/OFF CONTROL terminals (item #13, Fig.
Model PA635 Page 19 PA635 SPECIFICATIONS Number of channels 6 Power Output 35 Watts at 8 Ohms Rated continuous power, each channel, all six channels simultaneously driven, 20 Hz to 20kHz, at rated THD Power Output Short term continuous, each channel, 2 channels driven, 1 kHz, at rated THD Bridged Power Output 55 Watts at 8 Ohms 80 Watts at 4 Ohms 150 Watts at 8 Ohms Short term continuous, one pair driven at 1 kHz, at rated THD Rated THD < 0.
Page 20 Model PA635 Part No. 08901150 Rev A 01-02-2002 © 2001 Xantech Corporation.
