Read Sony ICF-CD2000 / ICF-CD2000S Service Manual online
– 11 –
Service Mode (Service program)
The equipment is provided with a service program built in the
microcomputer, like conventional models.
Service program operation methods are described in the follow-
ing.
microcomputer, like conventional models.
Service program operation methods are described in the follow-
ing.
• Step 1 (Service mode setting methods)
1. Connect TP447 (CD TEST 2) to the TP444 (GND).
2. Turn ON the S423 (CD OPEN switch).
3. Insert external power supply.
4. Connect TP453 (RESET) to the TP444 (GND) to make open.
2. Turn ON the S423 (CD OPEN switch).
3. Insert external power supply.
4. Connect TP453 (RESET) to the TP444 (GND) to make open.
(Reset)
• Step 2 (Operation in the service mode)
1. Once the service mode is effected, the LCD displays 18 indi-
cations each of which is repeatedly displayed.
2. By pressing the
>
or
.
key, the optical pick-up is mov-
able inwardly or outwardly. However, if this is activated, track-
ing servo and sled servo are turned OFF, so it can be turned
ON by pressing the
ing servo and sled servo are turned OFF, so it can be turned
ON by pressing the
[BAND]
key if required.
3. Without disk, focus searching is repeated continuously.
4. By pressing the
4. By pressing the
[BAND]
key, tracking servo, sled servo and
CLV-A (servo in PLAY) are turned ON. Then playing begins.
No muting is ON in the service mode.
No muting is ON in the service mode.
• Step 3 (Resetting of service mode)
1. Remove external power supply.
2. Disconnect TP447 (CD TEST 2) and TP444 (GND), and also
2. Disconnect TP447 (CD TEST 2) and TP444 (GND), and also
TP453 (RESET) and TP444 (GND).
SECTION 4
SERVICE MODE
Fig. 3 Location of CD TEST terminal
– LCD Board (Component Side) –
TP444
(GND)
TP447
(CD TEST 2)
TP453
(RESET)
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