Servicing Notes - Sony SA-TSLF1H Service Manual

[AMP Board Input Signal Check Procedure]
Note 1:
Connect the SA-WSLF1H to the HCD-LF1H. Set up the system so that the infrared signal from IR transmitter (DIR-T1) can be received by the
rear speaker (SA-TSLF1H).
Note 2: The IR status indicator of this unit (SA-TSLF1H) lights in red when the power of the SA-WSLF1H receiving waiting state (when data is not
transmitted.) When the power of the SA-WSLF1H is turned on and the infrared signal from IR transmitter (DIR-T1) is received by this unit (SA-
TSLF1H), the IR status indicator of this unit (SA-TSLF1H) lights in green.
Check procedure:
1. Connect a spectrum analyzer and an oscilloscope to the connector CN7301 pin-1 of DIAT PD board.
IR transmitter
(DIR-T1)
Subwoofer
(SA-WSLF1H)
2. Confirm that the spectrum is displayed as shown in Fig. 1 on spectrum analyzer. Also confirm that the waveform as shown in Fig. 2
is displayed.
4.5MHz
Fig. 1
• SERVICING POSITION (DIAT AMP BOARD)
Refer to figure, and inspect the DIAT AMP board.
SECTION 1

SERVICING NOTES

Infrared
Transmission
* In the case of DIR-R3 is connected, the connector CN7301 pin-1 of
DIAT PD board is checked.
↓
DIAT AMP board
SA-TSLF1H/SS-CTLF1H/TSLF1H/TSLF1HW
IR receiver diode (D7301-D7304)
DIAT PD board
SPK JACK board
Spectrum analyzer
or Oscilloscope
CN7301 1 pin
Fig. 2
3