Sony MDX-C7970 User manual

MICROFILM
SERVICE MANUAL
Model Name Using Similar Mechanism MDX-C7900/C7900R
Base Mechanism Type MG-164N-138
Optical Pick-Up Name KMS-241B/J1NP
US Model
Canadian Model
E Model
MDX-C7970
AEP Model
UK Model
MDX-C7970R
SPECIFICATIONS
MDX-C7970/C7970R
Photo: MDX-C7970R
FM/AM(MW/LW) MINIDISC PLAYER
– Continued on next page –
For RM-X4S (Remote Commander),
please refer to RM-X4S Service Manual
(9-925-698-∏) previously issued.

MDX-C7970/C7970R
4-8. SCHEMATIC DIAGRAM – SERVO Board (1/3) –
•See page 67 forWaveforms. •See page 63 for IC Block Diagrams.
– 37 – – 38 –
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark :MD PLAY
∗: Impossible to measure
The components identified by mark !or dotted
line with mark !are critical for safety.
Replaceonly with partnumberspecified.
Lescomposantsidentifiésparune marque !sont
critiques pour la sécurité. Neles remplacer que
par une piéce portant le numéro spécifié.
(Page 39)

MDX-C7970/C7970R
– 39 –
4-9. SCHEMATIC DIAGRAM – SERVO Board (2/3) – • See page 67 forWaveforms. •See page 62 for IC Block Diagrams.
– 40 –
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark :MD PLAY
∗: Impossible to measure
(Page 38) (Page 41)

MDX-C7970/C7970R
– 41 –
4-10. SCHEMATIC DIAGRAM – SERVO Board (3/3) – • See page 67 forWaveform.
– 42 –
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark :MD PLAY
∗: Impossible to measure
(Page 40)
(Page 47)

MDX-C7970/C7970R
– 47 – – 48 –
4-13. SCHEMATIC DIAGRAM – MAIN Board (1/4) – • See page 67 for Waveforms. •See page 65 for IC Block Diagrams.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : AM (MW)
[]:LW
〈〈 〉〉 : MD PLAY
(Page
42)
(Page 52)
(Page 53)
(Page 49)

MDX-C7970/C7970R
– 49 – – 50 –
4-14. SCHEMATIC DIAGRAM – MAIN Board (2/4) –
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : FM
(Page 48)
(Page 54)

MDX-C7970/C7970R
– 51 – – 52 –
4-15. SCHEMATIC DIAGRAM – MAIN Board (3/4) – • See page 67 for Waveforms. •See page 65 for IC Block Diagrams.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : AM (MW)
[]:LW
(Page 48)
(Page 53)

MDX-C7970/C7970R
– 53 – – 54 –
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : FM
( ) : AM (MW)
[]:LW
〈〈 〉〉 : MD PLAY
4-16. SCHEMATIC DIAGRAM – MAIN Board (4/4) – • See page 66 for IC Block Diagrams.
(Page 52)
(Page 48)
(Page 49)
(Page 61)

MDX-C7970/C7970R
– 57 – – 58 –
4-18. SCHEMATIC DIAGRAM – DISPLAY Board – • See page 68 forWaveform.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(Page
61)

– 61 –
4-20. SCHEMATIC DIAGRAM – SUB Board –
MDX-C7970/C7970R
(Page 54) (Page 57)