Troubleshooting Guide - Sony SDM-HX93 Service Manual
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Also See for SDM-HX93:
- Manual (376 pages) ,
- Instrucciones de operación (25 pages) ,
- Operating instructions manual (27 pages)
Table of Contents
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TROUBLESHOOTING GUIDE
NO POWER
(POWER INDICATOR OFF)
CHECK J705
VOLTAGE
PIN 5, 6, 8(5V)
PIN 1, 2(12V)?
YES
CHECK
U501 PIN 8 Voltage
(5V) ?
YES
CHECK KEY CONTROL
CONNECTOR ROUTINE
IS U201
PIN94 (3.3V), PIN85(2.5V)
VOLTAGE REPEATED
AS PULSE
SHAPE ?
YES
CHECK IIC LINE
CONNECTION
(U501, U502)
1. NO POWER
NO
NO
NO
CHECK U201 VCC,
X501 XTAL CHECK
- 13 -
CHECK POWER
BOARD, AND FIND
OUT A SHORT POINT
AS OPENING
EACH POWER LINE
CHECK 5VS LINE
(OPEN CHECK)
NO PROBLEM
NO PROBLEM
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