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Readable text and good copy. Very much needed if you wish to do some repairs on this fine old unit.
Text excerpt from page 46 (click to view)
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7.1.3 SINGLE OPERATION METHOD Single operation method and input level.
A Note : Before the diagnosis, discharge the Amp power line. Connect the resistor of 100� or more between W301(VH+), W303(VH�) and GND (CN3003 Pin1) on the E-VOL ASSY. Refer to the next page about the points. The procedure and the input level of a single operation are shown below. 1. Short R84 with 1k� on the PRIMARY ASSY. 2. The power supply of the unit is turned on. 3. The terminal SPCONT (7 pin of CN3002) on the E-VOL ASSY is controlled by the following voltages. The initial state is �SP Relay is OFF� and �Sys. Mute is ON�. Apply DC+12V to SPCONT so that AMP can output to the speaker terminal. [ SPCONT ] CONT SP Relay Sys. Mute 0V OFF ON 5V ON ON 12V ON OFF
B
[ The Signal Input ] Note : This unit has the electric volume and this volume is only controled by U-com in the Receiver. So, please input the signal to the point after the electric volume output. Input Point R3101 R3102 Output Point Speaker Out Speaker Out Speaker Out Gain (1kHz) 36 dB 36 dB 36 dB Input Level(rms) Output Level(rms) 44.6 mV 2.8 V 44.6 mV 2.8 V This is matrix center, so only the phase differential part is outputted.
L ch R ch C ch C
R84 1k� Point
SIDE A
W
NDING
9 H6 W132 W141 W111 1 2 H5
RISK OF FIRE
H R83
G
D
PRIMARY ASSY
FU3
W133
TX WINDING CHK
/YPW WIRE JP
W147
W144 R92
C1
ON/OFF W114
8 PT NK
REPLACE FUSE AS MAR
W115
L1
ALL
W146
BINDER W117
C5
R84 1k� Point
TUBE SIDE
OPEN
D92 Q81 D93 R91 C84
