HTV-SW1, HTV-C1
44
Take off theW131
Short-
circuited
Short-circuit W141 (PRIRY) and W142 (UNREG+9) in
the TANDBY PT assembly.
Short-circuit W215 (SPRY) and W216 (GNDD) in the
AFPS assembly.
[At the time of L/Rch analysis]
Disconnect C6031 in the AFPS assembly and apply the
signal to W251 (L ch IN). [In case of the right channel,
disconnect C6023 and apply the signal to W240 (R ch IN).]
÷
As the gain from L ch IN to L ch SP OUT is about 37 dB
(freq. = 1 kHz), input of 40 mVrms to L ch IN results in
output of 1 W (2.83 Vrms/8
Ω
) at L ch SP OUT.
[At the time of SWch analysis]
Disconnect W131 (SW IN) in the PAMP assembly.
Apply the signal to the plus pole of CI100.
÷
As the gain from CI100 to SWch is about 38 dB
(freq. = 100 Hz), input of 36 mVrms to CI100 results in
output of 1 W (2.83 Vrms/8
Ω
) at SWch SP OUT.
1
1
2
3
4
4
5
5
PAMP ASSY
SIDE A
SIDE A
SIDE A
STANDBY PT ASSY
AFPS ASSY
Short-circuited
Enter an signal input
Take off the C6031
KN101
JACK ASSY
AFPS ASSY
KN1001
2
3
3
7.2.2 INDEPENDENT OPERATION DIAGNOSIS METHOD(HTV-A1)
Enter an
signal input
In principle, the HTV-1 system operates only as a combination
of HTV-C1 and HTV-A1, but analysis from the electronic
volume control (M62419FP) on is possible according to the
following method.
Note: The white numbers in black circles in the drawing
correspond to the following step numbers.
Caution items for diagnosis of the AF
PS assembly after removal from the
chassis
The assembly operates only when the earth
fittings KN101 (AFPS assembly) and KN10
01 (JACK assembly) are connected.
For diagnosis with the AFPS assembly remo
ved from the chassis, perform diagnosis with
these earth fittings short-circuited.
