HTV-SW1, HTV-C1
46
7.4 INDEPENDENT OPERATION DIAGNOSIS METHOD (HTV-C1)
MAIN ASSY
H
SIDE A
AC26V
FRONT
CN501
CN3001
CN503
KN4001
KN501
T2
EARTH METAL FITTING KN501and KN4001at the short-circuit
MAIN ASSY
H
SIDE A
SURR. MODE
Gain (dB)
OFF
-3.0dB
VD (3)
-3.6dB
ST - WIDE
-3.5dB
CAUTION :
• In principle, the HTV-1 system operates only as a combination of
HTV-C1 and HTV-SW1, but operation is possible by applying
AC 26 V at the input side (bettween AC1 and AC2) of the
subtransformer (T2) in the MAIN assembly.
• In this case, it is not possible to check all functions (functions on
the HTV-A1 side).
• The gain from the pin jack [(INPUT 1 (2)] to AL6+ (-) or AR6+
(-) is as shown below.
• With input of -14 dBV (200mV rms) to INPUT 1 (2), -17 dBV
appears at AL6+ (-), AR6+ (-) in case of SURR. OFF.
# In case of independent operation, a DC component appears at
AL6+ (-), AR6+ (-) depending on the signal level.
• Caution and diagnosis method at the time of removal of the MAIN assembly from the chassis.
No operation occurs when the earth plates KN501 and KN4001 are not connected. When diagnosis is to be performed with the
MAIN assembly removed from the chassis, short-circuit the earth plates KN501 and KN4001 before diagnosis.
