Audio Circuit - Hitachi DV-W1U Service Manual
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Also See for DV-W1U:
- Instruction manual (67 pages) ,
- Owner's manual (66 pages) ,
- Service manual (35 pages)
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3-2. AUDIO CIRCUIT
SIGNALS AT IC1501
pins 1, 2, 3, 5 AND
IC1507 pins 40, 41, 45,
SIGNALS AT IC1501
PINS 13, 15 and
IC1507 pins 9-14?
IS IC1501 pin 21
and IC1507 pin 3-6
IS Q1507, Q1501
ARE SIGNALS AT
IC1507, IC1508,
BREAKDOWN OF
Q1305, Q1307-Q1311, Q3503, Q3504
NO SOUND
No
IS THERE
BREAKDOWN BEFORE IC1201
AN IMAGE?
Yes
ARE IC1501
No
pins 8, 9, 15, 20
pin 3 +5V & pin 1 +8V
5V?
Yes
BREAKDOWN OF IC1506
ARE THERE
No
BREAKDOWN OF IC1201
46, 47, 38?
Yes
ARE THERE
No
SIGNALS AT IC1501
IC1507 pins 34, 35, 36?
Yes
IS Q1505
No
BASE VOLTAGE
0V?
BREAKDOWN OF IC1501
Yes
IS Q1505
No
BREAKDOWN OF Q1505 OR
COLLECTOR
Q1506 OR D1504
VOLTAGE
8V?
Yes
No
BREAKDOWN OF
IC1501, IC1507
VOLTAGE 5V?
Yes
No
COLLECTOR
BREAKDOWN OF Q1507, Q1501
VOLTAGE 8V?
Yes
No
BREAKDOWN OF
IC1507, IC1508, IC1509, IC1510
IC1509, IC1510
pins 7, 8?
Yes
Get other manuals https://www.bkmanuals.com
No
ARE IC1505
CHECK IC1505 OR +8V LINE ETC.
Yes
ARE THERE
CHECK IC1101/ IC1601
pins 26,27,28 and
No
1 - 5
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